US 1605830 A
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Description (OCR text may contain errors)
J. B. GARBER El AL Nov. 2 1926.
PUMP Fild Sept. 22, 1923 4 Sheets-Sheet 1 Ndv. 2 1926.
- 1,605,830 J. B. GARBER ET AL I PUMP Filed Sept. 22
' 4 Sheets-Sheet JSkK EMT RS Nov. 2 ,'19z6,
4 Sheets-Sheet 5 J GARBER El A L PUMP Flled Sept 22 1923 EL EN T0125 7 Patented No 2, 192
UNITED STATES PATENT OFFICE.
JESSE B. GARBER AND CHARLES CORNWALL, F SALEM,OHIO, ASSIGNORS- TO THE DEMING COMPANY, OF SALEM, OHIO, A CORPORATION OF OHIO.
Application filed September 22, 1923. Serial No. 664,162.
This invention relates to pumps and an essential object of the present invention is to eliminate some of the objectionable features of vertically operable pressure pumps.
Some of these objectionable features are, the subjection of the main casting which forms'the suction chamber to discharge pressure; the loss of prime when the pump. is
cover'plate being removed for clearness of illustration; Fig.2 isa vertical transverse section through the pump; Figs. 3 and i are sections taken onthe correspondingly mum bered lines in Fig. 2 Fig. 5 is a longitudinal section through the upper part of the pump and Fig. 6 is a sectional elevation of I a portion of the pump showing the accessi-.
bility of the connection between the plunger .and the cross head; Fig. 7 is a section similar to the section of Fig, 6 taken on a plane parallel to the :drive shaft and wrist pin and showing a modified form of cross head and connections. A v v The pump illustrated in the drawings, is a triplex p mp and comprises a base 10, and
cross heads, and partly by a cover plate 25 which carries a stufling box 27 and is adapted to close the lower end of the suction chamher. The hollow portions are shown as connected by upright frame arms 18, adjacent the ends of the pump. 6
The dischar e housin or casing 13 is the only castingw ich is su jected to discharge pressure. Accordingly, this casting may be made sufliciently heavy to withstand anypredetermined pressure, while the castings for the base and intermediate housing need be only sufficiently strong to withstand the Weight of the parts and to provide sufiicient rigidity for supporting the moving elements. The discharge housing preferably rests upon the top of the intermediate housing and is provided with. openings 28 iii the top thereof which are arranged to be closed by cover plates 22. To hold this housing in locked position, We have shown cross bars 21 which engage the top of the cover plates 22 and which are adapted to be clamped to the intermediate casing by securing members 20. To obtam an intermediate. housing which we employ a cylinder 23' which extendsinis to be subjected only to suction pressure,
to the suction chamber 12 and is open at the bottom thereof to provide communication with the space intermediate the walls of the cylinder and the walls of the housing In the preferred form, the cylinder is threaded as at 24 so as to be removablyconnected to the housing (13. This construction peran mterme iate frame orv bearing housing mits the removal of the cylinder whenever the housing 13 is lifted from the housing 11. Moreover, the replacement of the cylinder may be. readily effected,- while the size thereof may be" varied in accordance withthe ressure. The inlets, to the suction. cham er- 12 are indicated at 19' as vbeing above the bottom of the cylinder wherefore, the cylinder is always provided'with a liquidv seal and the loss of prime is prevented'. J
v To permit-examination and repair of the valve members'without dismantling'the en-'- tire ump, we have shown a discharge valve 60 o the balland cage type, as having a lower ends 7 ed to the cross heads 16. 'Each cross head shank'61, which is threaded to engage a correspondingly threaded portion within the cover 22. Thusthe discharge valve may be readily removed merely by removal of theacking such as a cupin turn is reciprocatedby mechanism mount ed within the lower portion of the housing 11. Since the chamber 12 is subjected only to suction pressure, then the packing in the stuffing-box 27 need exert only suflicient pressure on the rod '8 to prevent the entrance of air into the suction chamber. When the pump is inactive however, the packing. functions to prevent the leakage of water downwardly along the piston rod.
To prevent leakage into the lubricant chamber, we'utilize a flange 37 on the crosshead which serves to collect any leakage water flowing along the rod. Any sur lus liquid within the cup-shaped .portion 0 the cross-head may be led away by a conduit 38 into a space within the housing 11 formed by transverse walls 39. A waste or drain 60. driven by a pinion 52 on a drive shaft 50.
The shafts 15 andv50 are mounted in bearconduit 40 may be connected to carry the liquid from thebase.
A convenient means for connecting the piston rod to the cross-head is illustrated by a threaded member 33 which engages the rod 8 and abuts a transverse wall 29 in the cross-head. An opening 34; in the cross-head permits the member 33 to be moved relativel to the rodwhenever the cross-head is in the uppermost osition, as shown in Fig. 6. When themem er 33 is removed, then the piston rod and plunger may be lifted out of the cylinder which necessitates merely removal of the cover plate 22.
To operate each cross-head, we have shown a connecting;rod 55 which engages a wrist pin 56 in thecross-head and is mounted at the other end on'an eccentric drum 54, asv
shown in- Figs. 2, 3 and 6. Each drum is rigidly connected or is integral with a gear 53 which in turn is loosely-mounted on a stationary shaft 15. Each gear is shown as ings 14 and 51 respectiyely in the housing 11. These bearings are above the plane of separation between the housing and the base plunger pum 10 and are formed all integral with the intermediate housing 11, wherefore alignment between the shaftsv andthe cross-head is effectively maintained. Moreover, since each gear is rotatably mounted on .the shaft 15, and is individually driven-by a pinion 52, such gears may be adjusted and positioned relatively to each other to position each eccentric at the proper angle for timing the P- In orderthat all moving parts may be in an enclosed case, we find it desirable to provide closely fitting flatplates and 71 as shown in Fig. 2. These extend across from laterally projecting flanges'of the arms 18 and may be: secured byv any suitable. form of screws 73 preferably extending through both plates and being provided with wing or thumb nuts 72. 1 q,
As noted, the base 10 forms an oil cham-' her, and suitable drainage and venting may be provided by the passage indicated at 67 from which rises-a cap on its upper en provided with a small opening as shown at 69.
(gauge pipe 68 having a Lubricatlon of the wrist pins and crossheads also by the splash system may be facil itated by the use of grooves in the crosshead guides 35, as shown at 8 0, Fig. 7, terminating in an annular groove 81 limiting the upward splash and flow of the oil. These grooves also communicate with the, spaces .at the end of the wrist pin which in this form is shown with axial and radial oil passages 82 and 83. In the modification shown in Fig. 7 is illustrated another method of securing the piston rod 8 to the cross-head 16?, that isby the. use of a lock pin 85 fitted in a transverse hole in the head and engaging the end of the rod, as shown. A plate shown at as covering an opening in the gear housing may be provided if desired to afford convenient access thereto for inspec tion. adding oil, etc.
The construction above set forth provides a pump wherein the entrance to the cylinder, that is to the suction chamber, is always below the inlet conduit, so that the plungers are at all times submerged in liquid trapped in the chamber below the suction opening and the pump cannot lose the priming. Moreover, the difiiculties of disposing of leakage is eliminated while the entrance of leakage intothe oil chamber is prevented. A further important characteristic of a pump made in accordance with our invention is the-exclusion of discharge pressure on any part of the housing, other than the discharge housing, which is specifically designed to hold the discharge pressure. An advantage of this arrangement is that the main casting may be oflight construction-while the discharge casting may. be'varied to suit the pressure for which the pump is designed to operate. A further important feature of this invention is the independent connection between the driving and driven shafts for adjusting the angular position of each driving unit with relation to the adjacent unit,
wherefore the units employed are interchangeably used op single or multiple plunger pumps.
It will be noted that our construction pro- .vides for the simplest possible form of cylinders which may be made of anymaterial described, for the reason that each is a separate tube individually fastened to the discharge chamber. It will also be seen from the foregoing description that we avoid one of the principal diificulties of an inverted vertical pump,
that is, apump where the yvogkin plungers Summarizing other advanta es resulting from our construction, it will e seen that all moving parts are splash-oiled except the plungers operating in the fluid being pumped. It is convenient 'to provide all parts in an enclosed case and make all bearings of ample size. each eccentric rigid with its gear but capa ble of individual adjustment upon the main drive shaft makes possible the setting of the eccentrics and correspondingly the plungers, in any desired relation to each other. It will be noted that the eccentric gears and driving pinions are by our construction'mounted on parallel shafts having bearingsin the same casting, which is obviously advanta- 1 eous and which also allows for lubrication main casting including as it does all transverse and vertical bearing members for the moving parts, provides permanent and assured proper alignment, not only for the shafts, but for the cross-heads and plunger members as described. The accessibility .to the valves'as well as to theother parts proves itself very valuable 'in the course of years of operation of such pumps.
We claim 1. In a pump, the combination with an inlet housing of a dischargehousing, a cylinder carried by the discharge housing and projecting into the inlet housing and an inlet passageway in the first housing above the bottom of the cylinder, whereby the primin when t e pump 1s .inactiv hich dif:
The arrangement of of -the,'pump may be maintained 2. In a pump, the combination with a suction housmg of a a discharge housing positioned thereon and having an opening therein,'a closure for said opening and a discharge valve depending "from said closure.
. 3. In a pump, the combination with a suction housmg of a discharge housing positionedthereon and having an opening there in, a closure for said opertn a. cylinder within the suction housinggan a discharge valve carried by said closure and extending within said cylinder.
4. In a pump, the combin'aionwith a air of casings one superimposed upon the ot er, of .a cylin er carried by the upper casing and rojectinginto 'the lower casing and havmg the bottom thereof open, an inlet passageway in the lower'casin above'the entrance to the cylinder, 9. p unger movable within said cylinder an inlet valveon said plunger, and a discharge valve associated with the upper casing and extending across the upper end of said cylinder.
5. In a pump, the combination with a pair ofcasin one superimposed upon the other, of a cy inder carried by the upper casingr'and projecting into the lower casing so as 'to be held in spaced relation thereto, a
plunger movable withinthe cylinder, said upper casin having an opening in the top thereof, a c osure for saidopening, an inlet valve carried by the plun er and a discharge valve carried by said c osure, said valves being in vertical alignment to permit access thereto when the closure is removed. I
6. In a pump, the combination with a pair of casings, one su erimposed upon the other,
'a cylinder carrie by the upper casing and projecting into the lower casing so as to be disposed'in spaced relation thereto, an inlet passageway in the'lower casing, the bottom of said cylinder terminating short .of the'bottom of the lower casing and also being disposed below said passageway, a plunger epera'ble within said cylinder an inlet valve mounted onsaid plunger, the upper casing having an opening opposite said cylinder, a closure for said opening, a dischargevalve depending from said closure and projecting into said c linder, and means engaging the top of sai closure for holding the casing in clamped position.
7'. In a pump, the combination with a air of casings, one superim osed on-the ot er, ofa cylinder carried by t e upper casing and projecting into the lower casing, a cover plate mounted on the upper casing, a discharge valve removably secured to said cover plate and extendin within said .cylinder,-a plunger movable w1th the cylinder and having an inlet valve" mounted thereon, and
means within said lower'c'asing for operat ing said plun er. v n
8. The com ination with a pair of casings,
; one superimposed uponthe other, the lower casing comprising an inlet chamber and the discharge valve in threaded engagement with upper casing comprising a discharge chamsaid cover, said valve serving partially as her, a cylinder in threaded engagement with a head for said cylinder. 10 the discharge casing and projecting within In testimony whereof, We hereunto affix the suction chamber, the discharge casing our signatures. having an opening opposite the end of the JESSE B. GARBER. 7 cylinder, a closure for said opening and a CHARLES CORNWALL.