CN104034506B - A kind of bearing bore oil-gas two-phase flow moves and heat exchange test device - Google Patents
A kind of bearing bore oil-gas two-phase flow moves and heat exchange test device Download PDFInfo
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- CN104034506B CN104034506B CN201410298539.XA CN201410298539A CN104034506B CN 104034506 B CN104034506 B CN 104034506B CN 201410298539 A CN201410298539 A CN 201410298539A CN 104034506 B CN104034506 B CN 104034506B
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Abstract
The present invention proposes a kind of bearing bore oil-gas two-phase flow moves and heat exchange test device, design the straight nested structure of test bearing and axle, and designed oil transportation hole or groove on axle and test bearing inner ring, under guarantee test bearer ring, under lubricating condition, simplify test bearing lubrication system. Design the cavity heating arrangement of electrothermal, compared with the tap water heating type of cooling, simplified the structure to reduce costs. The axial distance collar of replacing different size and radially distance collar can be realized the bearing bore geometry of different size fast, and have reduced the cost of manufacturing cavity. Set up scavenge oil pump and made oil return smoothness, lubricating oil can be in chamber inner accumulated. Steam vent connects oil return case by oil circuit and avoids blast pipe to discharge contaminated with oil mist environment and avoid lubricating oil waste. Arrange oil gas state in high-speed camera shooting bearing bore, realize the synchronous recording at computer of oil gas status image and pressure and temp signal.
Description
Technical field
The present invention relates to a kind of experimental rig, be specially a kind of bearing bore oil-gas two-phase flow and move and heat exchange test device.
Background technology
Bearing bore is one of aero-engine component of lubrication system, for the lubricating oil of lubrication and cooling rolling bearing with anti-Only the sealing air of oil leak has formed the moving lubricating condition of oil-gas two-phase flow in bearing bore. Engine lubrication system andThe design dependency of secondary ventilation system, in the correct understanding of and heat exchange moving to bearing bore oil-gas two-phase flow and accurately calculating, is carried out axleHolding the moving and heat transfer experiments of chamber oil-gas two-phase flow is the important process of bearing bore engineering design and theory analysis, therefore needs to design phaseThe experimental rig of answering.
Document " Influenceofhighrotationalspeedsonheattransferandoilfilmthicknessinaero-enginebearingchambers.S.Wittig,etal.JournalofEngineeringforGasTurbinesandPower.1994,116 (2): 395-401 " a kind of bearing bore oil is disclosedGas two-phase flow and heat exchange test device, according to the elaboration of this paper, under its experimental rig test bearing ring, lubrication system adoptsThe form of the nested connections of multiple lassos, the higher and multiple lassos assembling centerings of the difficulty of processing of the each lasso of this structure areBe difficult to ensure card; The external side of its experimental rig bearing bore installs form that running water contains secondary chamber additional with heating or cooling cavity in addition, thisPlant structure and make experimental rig body numerous and jumbled on the one hand, running water supply and heating system cost are remarkable on the other hand. It tests dressPut motor and be connected rotating shaft by coupling with driving-belt, make experimental rig body numerous and jumbled with the mode of transmission.
Document " Aero-engine Bearing chamber oil gas two-phase lubricant medium flows and heat exchange research. and old thin. Northwestern Polytechnical UniversityDoctorate paper " a kind of bearing bore pilot system is disclosed, according to the elaboration of this paper, fuel feeding subsystem in its pilot systemSystem, air feed subsystem and bearing bore exerciser are all without heater, and therefore in bearing bore, lubricating oil, air and bearing bore chamber wall are equalWork approaching under room temperature state, in its chamber between oil gas medium and actual poor with the heat exchange situation of chamber wall and the engineering of bearing boreDifferent very large, be difficult to obtain reflecting the result of the test of bearing bore engineering reality. In its oil supply subsystem, return line passes through oil return pipeThe design that is directly communicated with oil feeding reservoirs causes bearing bore lubricating oil return not smooth, and lubricating oil is in bearing bore inner accumulated, and oil return pipeA large amount of bubbles that adulterate in lubricating oil in road, air enters fuel tank affects the physical propertys such as lubricating oil density viscosity, this design withIt is also widely different that in the negative pressure oil return of Aero-engine Bearing chamber and fuel tank, lubricating oil avoids existing the engineering reality of air as far as possible. ItsTwo exhaust outlets of bearing bore exerciser are open design, and the mist of oil that bearing bore exhaust outlet flows out, discharged to atmosphere, causes waste lubricatedOil and contaminated environment. In its data acquisition subsystem, many group pressure sensors, the direct connection data collector of thermal resistance, causeLine connects chaotic, and in wire, the signal of telecommunication disturbs each other, has reduced the quality of measuring-signal, pressure sensor, thermal resistance andData acquisition unit is without plug independently, therefore can not connect neatly and disconnect. Its power sub-system high speed motor passes through postPin shaft coupling connection rotating shaft, pin coupler is easily delivered to motor oscillating the rotating shaft in bearing bore, causes bearing bore testDevice vibration and affect the stably measured of oil gas media flow state and pressure and temp signal.
In above-mentioned two documents, all need to change a whole set of cavity and end cap when the width of experimental rig cavity and Level ChangeDeng parts, reduce on the one hand the convenience of changing, process on the other hand the parts costs such as multiple cavitys and end cap higher;In addition in experimental rig, lubricating oil is contained in a fuel tank, makes in fuel tank lubricating oil temperature wayward, in fuel tank oil return andFuel feeding blending is also unfavorable for separating out of air in lubricating oil. Two kinds of experimental rig right end caps are monoblock lucite, and right cover plate is strongDegree is not enough, in the time that cavity vibrate the distortion of right cover plate very large, while causing pilot system work, seal clearance is inhomogeneous, affects and enters axleHold the stability of chamber Air Flow. In bearing bore corresponding to pressure and temperature that other two kinds of experimental rigs all cannot obtain gatheringOil-gas two-phase flow moves status image information, cannot meet the need that fully understand oil gas medium state in engineering design and theory analysisAsk.
Summary of the invention
The technical problem solving
Move and heat transfer experiments in order to manufacture and design bearing bore oil-gas two-phase flow under compact conformation cost savings conditionDevice, and ensure that in fuel tank, lubricating oil temperature is easy to control and reduce dilution air, promote bearing cavity configuration dimension modifying justVictory, the quality of the pressure and temperature signal that enhancing gathers, oil gas media flow image and pressure temperature in synchronization gain bearing boreDegree signal, the present invention proposes a kind of bearing bore oil-gas two-phase flow and moves and heat exchange test device.
Technical scheme
Technical scheme of the present invention is:
Described a kind of bearing bore oil-gas two-phase flow moves and heat exchange test device, it is characterized in that: comprise power and supporting systemSystem, bearing bore basic machine, oil circulation system, air supply system and measurement camera system;
Power and supporting system comprise support platform and power set, support platform supporting power set and bearing bore machineryBody; Power set drive the axle in bearing bore basic machine to rotate;
Bearing bore basic machine comprises bearing bore parts and left cavity support unit, left cavity support unit block bearing chamberParts, and left cavity support unit is fixedly connected with support platform; Bearing bore parts comprise left cavity, block bearing, left end cap,Axle, test bearing, bearing branch, right cavity, right cover plate, right end cap; Bearing branch and the coaxial interference fit of test bearing; BearingBranch left side card and left cavity right-hand member flange face sealing secure fit, left cavity left end and left end cap secure fit; Bearing props upDish right side card and right cavity left end by a pair of axial distance collar and radially distance collar coordinate, right cavity right-hand member passes through that another is rightAxial distance collar and radially distance collar coordinate with right cover plate; Right cavity excircle cover has metal guide hot jacket, metal guide hot jacket overcoatThere is net with heating function; Left cavity right-hand member flange face, bearing branch, right cover plate flange face are by the coaxial secure fit of stay bolt; Right cover plateOn have stepped hole, in stepped hole, be fixed with window glass; Right cover plate right side and right end cap secure fit;
Axle is through in left cavity and right cavity and is arranged on block bearing and test bearing, and wherein block bearing is arranged onIn left cavity, by left end cap axial compression block bearing; Axle left end passes left end cap and coordinates with power set; Axle right-hand member passesRight end cap coordinates with oil circulation system; There is central pipeline road at Zhou Youbanduan center; Axle central authorities' pipeline road left end and examinationTest bearing alignment, and on axle, have multiple radially pipeline roads and be communicated with central pipeline road, on the lateral wall of axle, have oil transportationCircumferential groove radially pipeline road is communicated with, and oil transportation circumferential groove aligns with test bearing radial position, and test bearing inner ring is rightClaim to have in the both sides of roller radially oil transportation hole to be communicated with the oil transportation circumferential groove on axle;
Left cavity and right cavity are communicated with oil circulation system by oil exit pipe and blast pipe respectively separately; On right cavityAlso have pressure sensor that tapped through hole, thermal resistance installation through hole are installed;
Oil circulation system is divided into lubricating oil and supplies with oil circuit and lubricating oil recovery oil circuit; Lubricating oil is supplied with oil circuit uniform temperature is providedLubricating oil input central pipeline road; Lubricating oil reclaims oil circuit two loops, and a loop receives blast pipe oil return, anotherLoop receives oil exit pipe oil return;
Air supply system provides source of the gas by air compressor, and air flow circuit passes through appendix after air compressor is drawnConnect gas treatment equipment, be then divided into two points of gas circuits, pass into respectively left cavity and right cavity;
Measure camera system high speed camera lens and take the moving state of oil-gas two-phase flow in bearing bore by window glassImage is also recorded in storage device; Measuring the change of camera system send the input of case to pass by 37 core DB plug Bonding pressuresSensor and thermal resistance, become and send case that pressure, temperature data are passed through to 37 core DB plug connection data collectors of output.
Further preferred version, described a kind of bearing bore oil-gas two-phase flow moves and heat exchange test device, it is characterized in that:In oil circulation system, flow of lubrication and temperature can be controlled respectively, in air supply system, air stream can be controlled respectivelyAmount and temperature, rotating speed that can Control experiment bearing in power and supporting system.
Further preferred version, described a kind of bearing bore oil-gas two-phase flow moves and heat exchange test device, it is characterized in that:Between left cavity left end and left end cap, there is rubber blanket, by regulating rubber blanket thickness, regulate the axial installation site of block bearing.
Further preferred version, described a kind of bearing bore oil-gas two-phase flow moves and heat exchange test device, it is characterized in that:Pressure sensor is installed tapped through hole and on right cavity excircle, is symmetrical in oil exit pipe and blast pipe installation screwed hole axis both sidesUniform; Thermal resistance install through hole in pressure sensor install between screwed hole, pressure sensor installs screwed hole and oil exit pipeBetween installing hole and between blast pipe installing hole; Thermal resistance is installed through hole and is in a row arranged in the axial direction.
Further preferred version, described a kind of bearing bore oil-gas two-phase flow moves and heat exchange test device, it is characterized in that:Lubricating oil is supplied with oil feeding reservoirs in oil circuit and is loaded with lubricating oil, and oil feeding reservoirs is provided with filter, liquid level gauge, thermometer; In oil feeding reservoirs, go backHeater, thermocouple and oil circuit temperature controller are installed, and heater is communicated with AC electric-heating lubricating oil, and oil circuit temperature controller connects thermoelectricityLubricating oil temperature auto controlled heater switch are known in random thoughts; Lubricating oil supply with in oil circuit oil pipe connect successively oil feed pump, stop valve,Pressure gauge, overflow valve, check valve, pressure-reducing valve, flowmeter, flow control valve, digital display thermometer, lubricating oil is supplied with oil circuit end and is passed throughSwivel joint accesses central pipeline road.
Further preferred version, described a kind of bearing bore oil-gas two-phase flow moves and heat exchange test device, it is characterized in that:Lubricating oil reclaims a loop in oil circuit and receives blast pipe oil return, and blast pipe oil return is by oil inlet and oil return case after filter; Another returnsRoad receives oil exit pipe oil return, and oil exit pipe oil return is successively by stop valve, filter, scavenge oil pump, stop valve, Pressure gauge, direction controlValve processed, direction valve is then divided into two-way, a road oil inlet and oil return case, the filter of oil circuit is entered to supply with in another road.
Further preferred version, described a kind of bearing bore oil-gas two-phase flow moves and heat exchange test device, it is characterized in that:Air flow circuit connects successively cooler, air accumulator, water trap, pressure reducer, pressure by appendix after air compressor is drawnAfter table, oil sprayer, drier, air heater, be divided into two points of gas circuits; Every point of gas circuit connects gas circuit successively by appendixAfter choke valve, gas circuit flowmeter, air passage one-way valve, gas circuit thermometer, Pressure gauge, access left cavity or the right side by ventilating joint againCavity.
Beneficial effect
The present invention has designed test bearing and the straight nested structure of axle, and has designed oil transportation hole on axle and test bearing inner ringOr groove, under guarantee test bearer ring, under lubricating condition, simplify test bearing lubrication system. The cavity that has designed electrothermal addsHeat structure, compared with the tap water heating type of cooling, simplifies the structure to reduce costs. Change the axial distance collar of different sizeRadially distance collar can be realized the bearing bore geometry of different size fast, and has reduced the cost of manufacturing cavity. Set upScavenge oil pump make oil return smoothness, lubricating oil can be in chamber inner accumulated. Steam vent connects oil return case by oil circuit and avoids blast pipeDischarge contaminated with oil mist environment and avoid lubricating oil waste. Oil feeding reservoirs and oil return case are set respectively, and by directional control valve controlOil return case, to oil feeding reservoirs fuel feeding, is conducive to the fully cooling and bubbing of lubricating oil after reclaiming. Set up to become and sent case, realizedThe neat layout of temperature and pressure multiplexed signal sampling circuit, has reduced current signal interference, and data acquisition circuit installs additional multiple37 core DB plugs, realize Fast Installation and the dismounting of data acquisition circuit. High-speed induction motor is better by absorbing performanceThe direct connecting axle of diaphragm coupling, had not only reduced the interference of high-speed induction motor to bearing bore oil gas media flow but also had made testApparatus structure compactness. Under the prerequisite that does not affect oil gas state in observation chamber, changing right cover plate is that metal material has effectively increasedThe intensity of right cover plate, has promoted the stability that seals air inlet. Arrange oil gas state in high-speed camera shooting bearing bore, realize oilThe synchronous recording at computer of gaseity image and pressure and temp signal.
Brief description of the drawings
Accompanying drawing 1 is structural representation of the present invention;
Accompanying drawing 2 is middle (center) bearing of the present invention chamber basic machine cutaway views;
Accompanying drawing 3 is oil circulation system schematic diagrames in the present invention;
Accompanying drawing 4 is air supply system schematic diagrames in the present invention;
Accompanying drawing 5 is in the present invention, to measure camera system schematic diagram;
Accompanying drawing 6 is left cavity support unit schematic diagrames in the present invention;
Accompanying drawing 7 is left cavity body structure schematic diagrames in the present invention;
Accompanying drawing 8 is right cavity body structure schematic diagrames in the present invention;
Accompanying drawing 9 is metal heat-conducting nested structure schematic diagrames in the present invention;
Accompanying drawing 10 is middle shaft structure schematic diagrames of the present invention;
Accompanying drawing 11 is in the present invention, to test bearing inner race structural representation;
Accompanying drawing 12 is net with heating function structural representations in the present invention;
Accompanying drawing 13 is right cover plate structure schematic diagrames in the present invention;
Accompanying drawing 14 is right end cap structural representations in the present invention;
Accompanying drawing 15 is to become and send case schematic diagram in the present invention;
Accompanying drawing 16 is thermal resistance and pressure sensor line graphs in the present invention.
Wherein:
1.T shape groove workbench 2. motor bearing seat 3. bearing bore supporting base 4. high-speed induction motors
5. diaphragm coupling 6. bearing plates 7. support the left floor of riser 8.
9. left cavity 11. block bearing 12. rubber blankets of right floor 10.
13. left end cap 14. round nut 15. stop back-up ring 16. loose ribs
17. axle 18. test bearing 19. bearing branch 20. sealing rings
21. left sealing rings 22. are the right cavity of distance collar 23. axial distance collar 24. radially
25. spring collar 26. metal guide hot jacket 27. net with heating function 28. taper bolts
29. right sealing ring 30. right cover plate 31. window glass 32. right end caps
33. blast pipe 34. oil exit pipe 35. frequency converter 36. air switches
37. oil feeding reservoirs 38. heater 39. thermocouple 40. filters
41. liquid level gauge 42. thermometer 43. oil feed pump 44. oil feed pump motors
45. stop valve 46. overflow valve 47. check valve 48. pressure-reducing valves
49. flowmeter 50. Pressure gauge 51. flow control valve 52. digital display thermometers
53. swivel joint 54. oil return case 55. choke valve 56. scavenge oil pumps
57. scavenge oil pump motor 58. directional control valve 59. thermal resistance 60. pressure sensors
61. changes send case 62. temperature transmitter 63.37 core DB plug 64. data acquisition units
65. computer 66. high-speed camera 67. air compressor 68. coolers
69. air accumulator 70. water trap 71. pressure reducer 72. gas circuit Pressure gauges
73. oil sprayer 74. drier 75. air heater 76. air temperature controllers
77. gas circuit choke valve 78. gas circuit flowmeter 79. air passage one-way valve 80. gas circuit thermometers
81. oil circuit temperature controller 82. tracheae 83. oil pipe 84. connector heads
85. resistance 86. power and supporting system 87. bearing bore basic machine 88. oil circulation systems
89. air supply systems 90. are measured camera system
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described:
With reference to accompanying drawing 1, the moving and heat exchange test device of bearing bore oil-gas two-phase flow described in the present embodiment comprise power andHold system 86, bearing bore basic machine 87, oil circulation system 88, air supply system 89 and measure camera system 90.
With reference to accompanying drawing 1, power and supporting system 86 are used for supporting high-speed induction motor 4 and bearing bore basic machine on the one hand87, for regulating the rotating speed of high-speed induction motor 4, regulate the rotating speed of test bearing 18 on the other hand. In the present embodiment, powerParts comprise high-speed induction motor, diaphragm coupling, frequency converter and air switch, and frequency converter 35 upstreams connect air switch 36,Air switch 36 is as the start and stop of master switch control high-speed induction motor 4. Frequency converter 35 downstreams connect high-speed induction motor 4, becomeFrequently the rotating speed of the frequency of the adjustable output AC electricity of device 35 and then control high-speed induction motor 4. Diaphragm coupling 5 two ends connect highThe speed rotating shaft of variable-frequency motor 4 and the axle of bearing bore 17, realize high-speed induction motor 4 and be with moving axis 17 to rotate.
With reference to accompanying drawing 1, in power and supporting system 86, support unit comprises T-slot workbench 1, motor bearing seat 2, bearingChamber supporting base 3. Motor bearing seat 2 is divided into upper and lower two parts: the latter half is two sections of channel-section steels of the back-to-back layout in the left and right sides, grooveSteel is pressed on T-slot workbench 1 with bolt and pressing plate by T-slot; The first half is the motor cabinet that Plate Welding becomes, and bolt is by heightSpeed variable-frequency motor 4 and motor bearing seat 2 connect firmly. Bearing bore supporting base 3 is two sections of channel-section steels of the back-to-back layout in the left and right sides, channel-section steelBe pressed on T-slot workbench 1 with bolt and pressing plate by T-slot, in bearing bore basic machine 87, bearing plate 6 connects firmly by boltOn bearing bore supporting base 3.
Bearing bore basic machine 87 is divided into bearing bore parts and left cavity support unit, with reference to accompanying drawing 2, and bearing bore parts bagDraw together left cavity 10, block bearing 11, rubber blanket 12, left end cap 13, round nut 14, stop back-up ring 15, loose rib 16, axle 17, examinationTest bearing 18, bearing branch 19, sealing ring 20, left sealing ring 21, radially distance collar 22, axially distance collar 23, right cavity 24, bulletSpring collar 25, metal guide hot jacket 26, net with heating function 27, taper bolt 28, right sealing ring 29, right cover plate 30, window glass 31, right end cap32, blast pipe 33 and oil exit pipe 34. Bearing branch 19 is embedded in test bearing 18 and test bearing 18 outer ring external cylindrical surface and axlesHold branch 19 inner cylinder face interference fit. The oil transportation hole of test bearing 18 inner rings is communicated with the oil transportation channel of axle 17, spring collar25 are stuck in the interior axial restraint test bearing of groove and the axle of axle. Left cavity 10 and right cavity 24 are enclosed within respectively bearing branch 19 left and rightOn the step surface of both sides, right cover plate 30 step surfaces embed in right cavity 24, and left cavity, bearing branch and right cover plate have coaxial lineBolt mounting holes, stay bolt is through after left cavity, bearing branch and right cover plate, and nut compresses left cavity, bearing branch and right coverPlate, and then form bearing bore in test bearing 18 both sides. Axle 17 left ends are supported by block bearing 11, and block bearing 11 embeds left chamberThe interior also interference fit of cylindrical hole of body 10, round nut 14 is spun on axle 17 and compresses stop back-up ring 15 and loose rib 16, thereby realThe axial location of existing block bearing 11 and axle 17. Overlap respectively and have left end cap 13 and right end cap 32, left and right end at axle 17 two ends, left and rightLid connects firmly respectively on left cavity 10 and right cover plate 30 by bolt, and left end cap 13 and right end cap 32 embed respectively left sealing ring 21With right sealing ring 29, sealing ring is enclosed within and on axle 17, realizes bearing bore and extraneous sealing. Right cavity 24 two ends, left and right inner ring and end facesHave respectively radially distance collar 22 and axially distance collar 23, radially distance collar 22 connects firmly at bearing branch 19 and right cover plate by screwOn 30, taper bolt 28 penetrates in right cover plate 30, axially distance collar 23 and right cavity 24, realizes three's circumferential location. Change footpathTo the size of distance collar 22, axially distance collar 23 and supporting right cavity 24, can combine and realize test bearing 18 right side bearingsThe width that chamber is different and height. Right cavity 24 overcoats have metal guide hot jacket 26 and net with heating function 27, and in net with heating function, the close heating wire of knitting leads toThere is electrothermal wire heating after alternating current, be embodied as the heating of right cavity. Sealing ring 20 embeds in the groove of left cavity 10, seals left cavity10 and the mating surface of bearing branch 19. Rubber blanket 12 is flexible and be clipped between left end cap 13 and left cavity 10 and regulate block bearing11 axial installation site.
Left and right cavity is connected with respectively blast pipe 33 and oil exit pipe 34, and blast pipe 33 is connected lubrication oil circulation system with oil exit pipe 34System 88. Axle 17 right-hand members are installed swivel joint 53, and swivel joint 53 connects oil circulation system 88. With reference to accompanying drawing 7 and accompanying drawing 14,Left cavity 10 and right end cap 32 have ventilation screwed hole, and the gas path joint of air supply system 89 spins into ventilation screwed hole, are axleHold chamber air feed.
With reference to accompanying drawing 8 and accompanying drawing 9, on the right cavity excircle of bearing bore basic machine, be symmetrical in oil exit pipe and blast pipe peaceDress screwed hole axis both sides have uniform pressure sensor that tapped through hole is installed, install between screwed hole at pressure sensor andBetween pressure sensor installation screwed hole and oil exit pipe installing hole, blast pipe installing hole, there is thermal resistance that through hole is installed, thermal resistance peaceDress through hole in a row arranges on right cavity excircle, there is F shape thermal resistance metallic channel in the axial direction. Metal heat-conducting put corresponding toRight cavity also has oil exit pipe that through hole is installed, blast pipe is installed through hole and pressure sensor installation through hole. Metal guide hot jacket inner circle postFace also has corresponding thermal resistance metallic channel corresponding to the thermal resistance metallic channel on right cavity outer circumference surface, when right cavity and metal guideWhen hot jacket assembles together, thermal resistance metallic channel overlaps. Thermal resistance 59 and the pressure sensor 60 of measuring camera system 90 are contained in right chamberOn body 24, measure the moving temperature and pressure of oil-gas two-phase flow in bearing bore.
With reference to accompanying drawing 10, there is central pipeline road at axle 17You Banduan center, and central pipeline road right-hand member has screwed hole, and revolvesThe oil circuit joint external screw thread of adapter 53 coordinates realizes connection oil transportation channel. Axle central authorities' pipeline road left end and test bearing pairTogether, in test bearing inner ring place axial positions, axle have four radially pipeline road be communicated with the central pipeline road of axle, axleOn excircle in test bearing inner ring, have and be communicated with the radially oil transportation circumferential groove of pipeline road. Symmetrical on test bearing inner ringThere is radially oil transportation hole to be communicated with the oil transportation circumferential groove on axle in roller both sides.
With reference to accompanying drawing 11, on test bearing 18 inner rings, there is two of left and right layout to arrange radially oil transportation hole, every row's oil transportation hole has fourIndividual radially oil transportation hole and uniform in a circumferential direction.
With reference to accompanying drawing 12, net with heating function 27 has the radial direction through hole of wearing blast pipe, oil exit pipe and pressure sensor, and net with heating function 27 hasHeating wire in sending and receiving heat supply network in two binding post external ACs.
With reference to accompanying drawing 13, right cover plate 30 has fan-shaped stepped hole, in conjunction with Fig. 2 and Fig. 1, pressing close in right cavity one side steps holeBe bonded with window glass 31, can have an X-rayed the moving state of oil-gas two-phase flow in bearing bore from window glass 31. Measure camera system 90High-speed camera 66 alignment windows glass 31 can take the moving state of oil-gas two-phase flow in bearing bore.
With reference to accompanying drawing 6, the left cavity support unit of bearing bore basic machine 87 comprises bearing plate 6, supporting riser 7, a left sideFloor 8 and right floor 9. Bearing plate 6 has bolt hole, connects firmly on bearing bore supporting base 3 by bolt. Supporting riser 7 is embedded inIn the groove of bearing plate 6 and and bearing plate 6 welding connect firmly, floor welding in left and right connects firmly bearing plate 6 and supports riser 7. ?Hold left cavity 10 external cylindrical surfaces of riser 7 top cylindrical surface adhesive, and welding connects firmly left cavity 10.
With reference to accompanying drawing 3, oil circulation system 88 is divided into lubricating oil and supplies with oil circuit and lubricating oil recovery oil circuit. Lubricating oil is supplied with oil circuitMiddle oil feeding reservoirs 37 is loaded with lubricating oil, and oil feeding reservoirs 37 is provided with filter 40, liquid level gauge 41, thermometer 42. The interior peace of oil feeding reservoirs 37Heater 38, thermocouple 39 and oil circuit temperature controller 81 are housed, and heater 38 is communicated with AC electric-heating lubricating oil, oil circuit temperature controller 81Connect thermocouple 39 perception lubricating oil temperatures auto controlled heater 38 switches. Lubricating oil is supplied with oil pipe 83 in oil circuit and is connected successivelyOil feed pump 43, stop valve 45, Pressure gauge 50, overflow valve 46, check valve 47, pressure-reducing valve 48, flowmeter 49, flow control valve 51,Digital display thermometer 52, lubricating oil is supplied with oil circuit end and is connected swivel joint 53, and the threaded oil circuit joint of swivel joint 53 screws in axleHold one end of chamber basic machine axis 17 and to supplying lubricating oil in axle.
With reference to accompanying drawing 3, oil circulation system 88 lubricating oil reclaim oil circuit two oil circuits. Wherein two of an oil circuit endBlast pipe 33 in the basic machine 87 of individual oil circuit joint connection bearing chamber on the cavity of left and right, oil pipe 83 one end connect oil circuit joint,The other end connects the rear connection oil return of filter 40 case 54. Two oil circuit joint connection bearing chamber machineries of another oil circuit end originallyOil exit pipe 34 in body 87 on the cavity of left and right, the oil pipe 83 of then drawing from oil circuit joint connects successively along oil flow directionStop valve 45, filter 40, scavenge oil pump 56, stop valve 45, Pressure gauge 50, directional control valve 58, directional control valve 58 is drawnTwo branch oil pipes 83 connect respectively oil return case 54 and supply with the filter 40 of oil circuit. Filter 40, liquid level are installed on oil return case 54Meter 41 and thermometer 42. Scavenge oil pump 56 oil-ins also pass through from oil return case except connecting the oil return oil pipe of drawing from bearing bore in addition54 filters of drawing 40 and choke valve 55 oil circuit oil suctions.
The oil feed pump 43 of oil circulation system 88 is connected respectively oil feed pump motor 44 and scavenge oil pump motor with scavenge oil pump 5657, under the driving of motor, pump is inhaled lubricating oil.
With reference to accompanying drawing 4, air supply system 89 provides source of the gas by air compressor 67, and air flow circuit is connected by tracheae 82,After air compressor 67 is drawn, connect successively cooler 68, air accumulator 69, water trap 70, pressure reducer 71, press by tracheae 82After power table 72, oil sprayer 73, drier 74, air heater 75, be divided into two points of gas circuits, two points of gas circuit Connection Elements are identical,Be that every point of gas circuit connects gas circuit choke valve 77, gas circuit flowmeter 78, air passage one-way valve 79, gas circuit temperature successively by tracheae 82After meter 80, gas circuit Pressure gauge 72, branch out again two ventilating joints, for the ventilating joint of left cavity air feed is threaded connection a left sideGas transmission screwed hole on cavity 10, for the ventilating joint of right cavity air feed is threaded connection the gas transmission screw thread on right end cap 32Hole. Air heater 75 connects air temperature controller 76, and air temperature controller 76 regulates the temperature of air.
With reference to accompanying drawing 5, accompanying drawing 15 and accompanying drawing 16, measure camera system 90 and comprise computer 65, high-speed camera 66, dataCase 61, thermal resistance 59, pressure sensor 60 are sent in collector 64, change. Measure in camera system 90 and become and send case 61 outer walls to be provided with 37Core DB plug 63 and connector head 84, become and send 37 core DB plugs 63 of case 61 signal output parts by data wire linking numberAccording to collector 64, data acquisition unit 64 is connected computer 65 and is transmitted and record pressure and temp data by data wire; Become and send case61 inputs have two 37 core DB plugs 63: wire Bonding pressure sensor 60 is passed through in 37 core DB plug 63 one end, left side,The other end send 37 core DB plugs 63 of case signal output part to be communicated with change; 37 core DB plug 63 one end, right side connect by wireConnect thermal resistance 59, the other end is connected with temperature transmitter 62. Temperature transmitter 62 connects change by wire and send case signal output part37 core DB plugs 63 transmit temperature signal. The rear connection temperature transmitter 62 of connector head 84 series resistance 85 is also temperatureTransmitter 62 is powered, and connector head 84 also connects left side 37 core DB plugs 63 and powers for pressure sensor 60.
Measuring in camera system send the case pressure sensor pressure sensitive end that 37 core DB plugs are drawn outside to have spiral shell from becomingLine, and be screwed in the pressure sensor threaded mounting hole of right cavity. Send the case part heat that 37 core DB plugs are drawn from becomingThe thermal resistance that some resistance is embedded between metal guide hot jacket and right cavity is installed the right cavity wall surface temperature of measurement in the line of rabbet joint, another part heatResistance is reached and in bearing bore, is measured oil gas temperature in chamber by the radially small through hole on right cavity excircle.
Adjust flow of lubrication by flow control valve 51 and flowmeter 49, by being installed on the oil circuit temperature control of oil feeding reservoirs 37Instrument 81 is adjusted the temperature of lubricating oil; Adjust air mass flow by gas circuit choke valve 77 and gas circuit flowmeter 78, by air temperature controlInstrument 76 is adjusted the temperature of air; Adjust the rotating speed of test bearing 18 by frequency converter 35. Combined lubrication oil and not homogeneous turbulence of airAmount and temperature and the different rotating speed of test bearing 18, it is moving that experimental rig is realized various working parameter lower bearing chamber oil-gas two-phase flowAnd heat transfer experiments.
Can be combined into bearing bore not by adjusting the radially size of distance collar 22, axially distance collar 23 and right cavity 24Same height and width dimensions, experimental rig is realized various structures parameter lower bearing chamber oil-gas two-phase flow and is moved and heat transfer experiments.
The lubricating oil that directional control valve 58 can select scavenge oil pump 56 to pump flows to oil return case 54 or flows to oil feeding reservoirs 37, examinationWhen experiment device work, can look temperature and the gassiness degree of lubricating oil in oil return case 54 selects scavenge oil pump 56 to oil return case 54 or suppliesFuel tank 37 pump oil, ensure in oil feeding reservoirs 37 suitable the and non-impurity-doped air of lubricating oil temperature.
Claims (7)
1. bearing bore oil-gas two-phase flow moves and a heat exchange test device, it is characterized in that: comprise power and supporting system, bearingChamber basic machine, oil circulation system, air supply system and measurement camera system;
Power and supporting system comprise support platform and power set, and support platform supporting power set and bearing bore machinery are originallyBody; Power set drive the axle in bearing bore basic machine to rotate;
Bearing bore basic machine comprises bearing bore parts and left cavity support unit, left cavity support unit block bearing chamber portionPart, and left cavity support unit is fixedly connected with support platform; Bearing bore parts comprise left cavity, block bearing, left end cap,Axle, test bearing, bearing branch, right cavity, right cover plate, right end cap; Bearing branch and the coaxial interference fit of test bearing; BearingBranch left side card and left cavity right-hand member flange face sealing secure fit, left cavity left end and left end cap secure fit; Bearing props upDish right side card and right cavity left end by a pair of axial distance collar and radially distance collar coordinate, right cavity right-hand member passes through that another is rightAxial distance collar and radially distance collar coordinate with right cover plate; Right cavity excircle cover has metal guide hot jacket, metal guide hot jacket overcoatThere is net with heating function; Left cavity right-hand member flange face, bearing branch, right cover plate flange face are by the coaxial secure fit of stay bolt; Right cover plateOn have stepped hole, in stepped hole, be fixed with window glass; Right cover plate right side and right end cap secure fit;
Axle is through in left cavity and right cavity and is arranged on block bearing and test bearing, and wherein block bearing is arranged on left chamberIn body, by left end cap axial compression block bearing; Axle left end passes left end cap and coordinates with power set; Axle right-hand member passes right-hand memberLid coordinates with oil circulation system; There is central pipeline road at Zhou Youbanduan center; Axle central authorities pipeline road left end and test axleHonour together, and on axle, have multiple radially pipeline roads and be communicated with central pipeline road, on the lateral wall of axle, have oil transportation circumferenceGroove radially pipeline road is communicated with, and oil transportation circumferential groove aligns with test bearing radial position, and test bearing inner ring is being symmetrical inThe both sides of roller have radially oil transportation hole to be communicated with the oil transportation circumferential groove on axle;
Left cavity and right cavity are communicated with oil circulation system by oil exit pipe and blast pipe respectively separately; On right cavity, also havePressure sensor is installed tapped through hole, thermal resistance is installed through hole;
Oil circulation system is divided into lubricating oil and supplies with oil circuit and lubricating oil recovery oil circuit; Lubricating oil is supplied with oil circuit provides the profit of uniform temperatureLubricating oil is inputted central pipeline road; Lubricating oil reclaims oil circuit two loops, and a loop receives blast pipe oil return, another loopReceive oil exit pipe oil return;
Air supply system provides source of the gas by air compressor, and air flow circuit connects by appendix after air compressor is drawnGas treatment equipment, is then divided into two points of gas circuits, passes into respectively left cavity and right cavity;
Measure camera system high speed camera lens and take the moving status image of oil-gas two-phase flow in bearing bore by window glassAnd be recorded in storage device; Measuring the change of camera system send the input of case by 37 core DB plug Bonding pressure sensorsAnd thermal resistance, become and send case that pressure, temperature data are passed through to 37 core DB plug connection data collectors of output.
2. a kind of bearing bore oil-gas two-phase flow moves and heat exchange test device according to claim 1, it is characterized in that: lubricating oilIn the circulatory system, flow of lubrication and temperature can be controlled respectively, in air supply system, air mass flow and temperature can be controlled respectivelyDegree, rotating speed that can Control experiment bearing in power and supporting system.
3. a kind of bearing bore oil-gas two-phase flow moves and heat exchange test device according to claim 1, it is characterized in that: left cavityBetween left end and left end cap, there is rubber blanket, by regulating rubber blanket thickness, regulate the axial installation site of block bearing.
4. a kind of bearing bore oil-gas two-phase flow moves and heat exchange test device according to claim 1, it is characterized in that: pressure passesSensor installation tapped through hole on right cavity excircle, is symmetrical in oil exit pipe and blast pipe installation screwed hole axis both sides are uniform; HeatResistance install through hole in pressure sensor install between screwed hole, pressure sensor is installed screwed hole and oil exit pipe installing hole itBetween and pressure sensor install between screwed hole and blast pipe installing hole; It is in a row in the axial direction that thermal resistance is installed through holeArrange.
5. a kind of bearing bore oil-gas two-phase flow moves and heat exchange test device according to claim 2, it is characterized in that: lubricating oil suppliesBe loaded with lubricating oil to oil feeding reservoirs in oil circuit, oil feeding reservoirs is provided with filter, liquid level gauge, thermometer; In oil feeding reservoirs, be also provided withHeater, thermocouple and oil circuit temperature controller, heater is communicated with AC electric-heating lubricating oil, and oil circuit temperature controller connects thermocouple perceptionLubricating oil temperature auto controlled heater switch; Lubricating oil is supplied with oil pipe in oil circuit and is connected successively oil feed pump, stop valve, pressureTable, overflow valve, check valve, pressure-reducing valve, flowmeter, flow control valve, digital display thermometer, lubricating oil is supplied with oil circuit end by rotationJoint accesses central pipeline road.
6. a kind of bearing bore oil-gas two-phase flow moves and heat exchange test device according to claim 2, it is characterized in that: lubricating oil returnsReceive a loop in oil circuit and receive blast pipe oil return, blast pipe oil return is by oil inlet and oil return case after filter; Another loop receivesOil exit pipe oil return, oil exit pipe oil return successively by stop valve, filter, scavenge oil pump, stop valve, Pressure gauge, directional control valve andAfter be divided into two-way, a road oil inlet and oil return case, the filter of oil circuit is entered to supply with in another road.
7. a kind of bearing bore oil-gas two-phase flow moves and heat exchange test device according to claim 2, it is characterized in that: air streamRoad connects successively cooler, air accumulator, water trap, pressure reducer, Pressure gauge, mist of oil by appendix after air compressor is drawnAfter device, drier, air heater, be divided into two points of gas circuits; Two points of gas circuits connect gas circuit throttling successively by appendix respectivelyAfter valve, gas circuit flowmeter, air passage one-way valve, gas circuit thermometer, Pressure gauge, access left cavity and right cavity by ventilating joint again.
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