CN1303313C - A sliding rotor type micro-internal combustion engine structure - Google Patents

Abstract

The present invention discloses a novel sliding rotor type micro-internal combustion engine structure, particularly a core member of a high-energy power pack designed by aiming at a portable energy resource, namely a micro heat engine. The present invention is mainly composed of a cylinder body of a combustion chamber, an output shaft perpendicular to the cylinder body, a rotor doing certain radial slide corresponding to the output shaft and rotating around the output shaft, an air inlet and outlet and an isoplanar structure of a front and a back end covers, wherein the cylinder body has a specific profile equation, is divided into two cavities with continuously changing volume through the rotor, works in a two-stroke mode, and mechanical energy of a pure rotary form is output. The present invention has the advantages of small bulk, light weight, high compression ratio, etc. The whole system only has one movable member (rotor), system reliability is greatly improved, and a multilayer plane form structure also provides structural insurance for universal micro mechanical processing to MEMS processing. Thereby, the present invention provides powerful support for the real micromation and practicality of a portable micro high-energy power pack using a micro-internal combustion engine as a base.

Description

A kind of sliding rotor type micro-internal combustion engine structure

Technical field

The invention belongs to the heat engine technical field, relate to a kind of micro internal combustion engine structural design, it is the organization plan that proposes at the micro generation system, be particularly related to a kind of design of sliding rotor type micro-internal combustion engine structure, may be used on also can be used in the middle of the energy supplying system of other micromachines in the power-supply system of portable type electronic product.

Background technique

Along with notebook computer, mobile phone, field work, autonomous mobile robot, the fast development of minute vehicle and military field electronic product can not have been satisfied the requirement harsh day by day to power supply energy density of these products based on the power-supply system of traditional chemical energy-storage battery.The traditional chemical battery mainly exists energy density low, and the operating time is short, and the length consuming time of charging waste product is difficult to handle, and can cause inherent defect such as serious environmental pollution.Therefore develop a kind of energy density height, operating time is long, pollutes little high-energy power-supply system, has and extensive market prospects, (http://www.sciencehuman.com, science man website 2004-02-05 publish an article in U.S.'s Futurist magazine in November, 2003 and December; Http:// news.china.com, the 2004-02-03 of www.china.com), this high-energy micro generation system that may be used for replacing chemical cell was chosen as in the following more than ten years one of the ten big innovative products of tool market prospects.

In the development project of existing abroad high-energy-density micro generation system, the micro generation system schema that with the micro internal combustion engine is core drive is extensively approved, this be because, (1) is that little power generation system of core is a driving source with the hydrocarbon fuel of high-energy-density with the micro internal combustion engine, under the not high situation of conversion ratio, still can obtains to be higher than the energy density of traditional chemical battery; Shortcomings such as (2) waste product with chemical cell is difficult to handle, and is seriously polluted are compared, and the by product of this class power generation system mainly is carbon dioxide and water, does not have environmental pollution problem substantially; (3) the chemical energy-storage battery duration of charge long, efficient is low, and this micro generation system only needs refuelling box where necessary, just can realize long-term stable operation, and is convenient and swift.External micro internal combustion engine structural type to have, mainly be with the microminiaturization of traditional macro internal-combustion engine, as the minitype piston internal-combustion engine, miniature three-apexed rotor internal-combustion engine and miniature turbine internal-combustion engine etc., but microminiaturized traditional combustion engine exists space availability ratio low, and indivedual complicated three-dimensional structures shortcoming (for example the minitype piston internal-combustion engine just needs crank and distribution device, and these structures cause whole internal-combustion engine to be difficult to microminiaturization) such as can't after microminiaturization, run well.

In existing several micro internal combustion engine schemes, the more miniature reciprocating IC engine of miniature rotor internal-combustion engine has bigger advantage, and embody as follows: the rotor internal-combustion engine space availability ratio is than the reciprocating IC engine height; The output of the machine power of rotation form operates steadily, and also is convenient to follow-uply change to electric energy; Can not have distribution and driving mechanism thereof, be convenient to real microminiaturization.External existing miniature three-apexed rotor internal-combustion engine scheme, and domesticly be in blank aspect the research of miniature rotor internal-combustion engine.Even yet still there are following some shortcomings in miniature three-apexed rotor internal-combustion engine, (1) compression ratio is lower, although traditional macro three-apexed rotor compression ratio of internal-combustion engine can reach ideal effect, but after microminiaturization, particularly enter into the MEMS field after, compression ratio is lower; (2) molded lines of firing chamber is complicated outward turning profile line, needs inside and outside gear engagement between stator and rotor, and this is a micromachined, and particularly the little processing based on the MEMS technology brings difficulty, and the cost height just means the difficulty of marketing; (3) outwards the power of output needs a crankshaft structure, and this also is not suitable for the micro-processing technology characteristics.And in the existing at home rotary internal combustion engine scheme, do not have and design proposition at the micro generation system, its structure is generally too complicated, can't realize microminiaturization.

Summary of the invention

In order to overcome the defective and the deficiency of micro internal combustion engine organization plan in little power generation system research, the purpose of this invention is to provide a kind of sliding rotor type micro-internal combustion engine structure and design.

The present invention is mainly by providing following technological scheme to realize: a kind of micro internal combustion engine structure of sliding rotor formula, and its structure mainly comprises the firing chamber cylinder body, igniter plug, output shaft, rotor, the inlet and outlet mouth, front and rear cover and plane institution movement thereof is characterized in that:

Described output shaft is perpendicular to the firing chamber cylinder body, and output shaft has vertical spatial relation with rotor, on rotor, along axial direction, has the slip groove of symmetry; Directly carry out the slide block guide rail formula between rotating shaft top and rotor groove and be connected, with pure rotation formula outputting power;

Rotor has along axis symmetrical structure feature, rotor is divided into two-part that volume constantly changes with the firing chamber, rotor is in rotation process, rotate around output shaft, simultaneously certain radially sliding arranged along output shaft, so that its two ends are in the line style contact condition with sidewall of combustion chamber always, keep the sealing of firing chamber; Molded lines of rotor is determined by required compression ratio;

The molded lines of firing chamber cylinder body is: in any corner, limit, the straight line line segment of two ends on curve are equal to each other excessively; The molded lines equation of firing chamber cylinder body can be expressed as ρ=a*[1-(1-k) * sin θ under polar coordinates], in the formula, θ represents angle of rotor, it is 0 pole axis length when spending that a is illustrated in polar angle, k=b/a, b is at polar angle being 90 pole axis length when spending;

Suction port is opened on cylinder side wall, particular location be angle of rotor when 180 spend, rotor apex and cylinder side wall position contacting.

Adopt the sliding rotor type micro-internal combustion engine of the present invention's design, it is simple in structure, and movable member is few, and space availability ratio is higher, is convenient to microminiaturization; The external form curve is simple relatively, is fit to micromachined; The compression ratio height need not distribution device; And be basic principle with the multilayer planar structure, for MEMS processing and fabricating in the future provides the structure guarantee; Be to be a kind of reliable, the effective scheme of the micro internal combustion engine power generation system of driving source with the hydrocarbon fuel.

Description of drawings

Fig. 1 is the sliding rotor type micro-internal combustion engine structure schematic representation that the present invention designs, and wherein schemes the plan view that a is a sliding rotor type micro-internal combustion engine.Figure b is sliding rotor type micro-internal combustion engine A-A directional profile figure, and the label shown in the figure represents 1 respectively, spark plug, 2, suction port, 3, rotor, 4, the firing chamber cylinder body, 5, output shaft, 6, and bottom head covers;

Fig. 2 is cylinder shaped conductor and rotor shapes curve synoptic diagram.AB wherein, CD are arbitrarily by initial point, the line segment of end points on the cylinder shaped conductor curve, and AB=CD, arc AEB and arc BFA constitute the basic shape of rotor, according to the compression ratio requirement, determine the concrete shape of arc.

Fig. 3,4,5,6 is micro internal combustion engine work cycle schematic representation.

Below in conjunction with accompanying drawing the present invention is described in further detail.

Embodiment

The sliding rotor micro internal combustion engine that the present invention is designed is worked in the two-stroke mode, and the working procedure of two firing chambers is opposite, pure rotary type energy output.

Its structure is mainly by igniter plug, and the firing chamber cylinder body perpendicular to the output shaft of cylinder body, rotates and the rotor that necessarily radially slides, porting arranged around output shaft; Plane structures such as front and rear cover are formed; As shown in Figure 1.

Symbol among the figure is: 1, igniter plug, 2, suction port, 3, rotor, 4, the firing chamber cylinder body, 5, output shaft, 6, bottom head covers;

The firing chamber cylinder shaped conductor is a smooth continuous closed curve, they are available equation ρ=a*[1-(1-k) * sin θ under polar coordinates] expression, as shown in Figure 2, cross limit, the line segment of two ends on curve has isometric feature, be central shaft with this line segment like this, rotor with symplex structure, cylinder body is divided into the firing chamber that two volumes constantly change, and when rotational angle theta=0 or 180 was spent, the combustion chamber volume of horizontal line top reached minimum, it is maximum that the combustion chamber volume of below reaches, and when θ=when 90 degree 270 were spent, two firing chamber bilateral symmetry reached equal volume.Have to slide along rotor centerline and use groove, rotating shaft is by pole location, and is vertical with plane, cylinder body place, firing chamber, and roller end and has slide block and cooperates with chute between rotor groove, and the realization rotor is along the function that radially slides of rotating shaft.Have suction port on the sidewall of cylinder body horizontal position, be higher than an atmospheric inflammable gas for the firing chamber of top provides, the air inlet timing has the rotor rotation position to determine.Spark plug is positioned at cylinder body top, firing chamber, rotational angle theta=90 degree places.

Clockwise turn to the suction port in the structure as described in (as Fig. 2) with rotor, be located at rotor apex when 180 spend and on the sidewall of firing chamber point of contact.

Clockwise turning to example, when angle of rotor θ=0, as shown in Figure 3, firing chamber I gas pressure compression process finishes, plug ignition, gas explosion burning, high temperature and high pressure gas promotes rotor and clockwise rotates, and Dui Ying firing chamber II is in discharge end with it, and air inlet begins.

Promote rotor with pressurized gas and clockwise rotate, rotor overcomes the outside output mechanical energy of resistance, and as shown in Figure 4, firing chamber I is in working stroke, and firing chamber II is in the air inlet compression process,

After rotor slips over the relief opening position, Exhaust Open, the discharging of beginning pressurized gas, as shown in Figure 5, and firing chamber II volume is still reducing.

After rotor forwards the suction port position to, air inlet open, the beginning air inlet, as shown in Figure 6, the air pressure of firing chamber I is very low, is in the exhaust process end.And firing chamber II begins igniting to finish the air inlet compression process, repeats firing chamber I working procedure just now.

Adopt the designed sliding rotor micro internal combustion engine of the present invention, it has following characteristics:

(1), multilayer planar structure, be suitable for micromachined up to the MEMS level, have higher space availability ratio, movable member few (have only rotor movable) has improved system reliability.

(2), the firing chamber, the molded lines curve of rotor is simple, greatly reduce little difficulty of processing and cost, has strengthened the product competition advantage in the process of commercialization in the future.

(3), the output of the energy of pure rotation formula, than the stroke piston combustion engine motion steadily, also be convenient to and being connected of follow-up electricity generating device.

(4), the compression ratio height, its theoretical maximum compression ratio is infinitely great, has improved the thermal efficiency of complete machine greatly.

(5), realize that by the angle of rotor position porting opens and closes, need not distribution and driving mechanism thereof, provide convenience, improved system's degree of reliability for microminiaturization.

Claims (2)

1. the micro internal combustion engine structure of a sliding rotor formula, its structure mainly comprises the firing chamber cylinder body, igniter plug, output shaft, rotor, the inlet and outlet mouth, front and rear cover and plane institution movement thereof is characterized in that:

Described output shaft is perpendicular to the firing chamber cylinder body, and output shaft has vertical spatial relation with rotor, on rotor, along axial direction, has the slip groove of symmetry; Directly carry out the slide block guide rail formula between rotating shaft top and rotor groove and be connected, with pure rotation formula outputting power;

Rotor has along axis symmetrical structure feature, rotor is divided into two-part that volume constantly changes with the firing chamber, rotor is in rotation process, rotate around output shaft, simultaneously certain radially sliding arranged along output shaft, so that its two ends are in the line style contact condition with sidewall of combustion chamber always, keep the sealing of firing chamber; The molded lines of rotor is determined by required compression ratio;

The molded lines of firing chamber cylinder body is: in any corner, limit, the straight line line segment of two ends on curve are equal to each other excessively; The molded lines equation of firing chamber cylinder body can be expressed as ρ=a*[1-(1-k) * sin θ under polar coordinates], in the formula, θ represents angle of rotor, it is 0 pole axis length when spending that a is illustrated in polar angle, k=b/a, b is at polar angle being 90 pole axis length when spending;

Suction port is opened on cylinder side wall, particular location be angle of rotor when 180 spend, rotor apex and cylinder side wall position contacting.

2. the micro internal combustion engine structure of sliding rotor formula as claimed in claim 1 is characterized in that, when rotor turned clockwise, described suction port was located at rotor apex when 180 spend and on the sidewall of firing chamber point of contact.

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