CN201778838U - Pneumatic automobile engine power system with single-screw expander - Google Patents
Pneumatic automobile engine power system with single-screw expander Download PDFInfo
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- CN201778838U CN201778838U CN2010201686241U CN201020168624U CN201778838U CN 201778838 U CN201778838 U CN 201778838U CN 2010201686241 U CN2010201686241 U CN 2010201686241U CN 201020168624 U CN201020168624 U CN 201020168624U CN 201778838 U CN201778838 U CN 201778838U
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Abstract
The utility model discloses a pneumatic automobile engine power system. An original pneumatic automobile piston power system is easy to wear, large in noise and complicated in a link mechanism. The pneumatic automobile engine power system mainly comprises a high-pressure air cylinder (1) as a power source, an adjusting valve (2) for realizing control, a heater (3) and a single-screw engine (4), and is characterized in that a single-stage single-screw expander or a multi-stage single-screw expander set is used as a pneumatic engine. The pneumatic automobile engine power system is simple in structure, low in noise, long in service life and is simple in control of an engine system link mechanism, an output shaft (5) is continuously stable in operation, the single-screw engine includes a single-stage expansion means and a multi-stage expansion means, connection means of the multi-stage system further includes a series form, a parallel form and a series and parallel mixed form, the arrangement means is flexible and varied, and the engine is wider in working range, and is easy in realization of connection and control. Because of the characteristics of the system, the pneumatic automobile engine power system has great advantages in application to pneumatic automobile engine systems.
Description
Technical field
The utility model relates to a kind of novel air motor power system, belongs to new and high technology automobile power field.
Background technique
Along with the raising of people's quality of life, automobile has progressively become means of transportation from luxury goods, though this has embodied social progress, has satisfied the demand of people on material, also makes people be absorbed in two hang-ups of resource-constrained and environmental pollution simultaneously.So people have begun to pay close attention to more the dependence of how eliminating mineral fuel, thirsting for the appearance of new " green car " and automobile green energy resource always.
From the thirties in 20th century with EV electric motor car till now HEV composite power electric vehicle and the substitute fuel automobile of storage battery as power, automobile never is interrupted with the research and development of the energy, but every research all exists a difficult problem of failing to capture.The substitute fuel automobile still has exhaust emission and thermal effect as gas-fueled vehicles, alcohols automobile, dimethyl ether automobile etc., and some fuel is also toxic, some fuel combustion control difficulty; Non-pollution discharge in the electric automobile during traveling, noise is low, energy conversion efficiency is high, but battery-driven electric vehicle is limited by on-vehicle battery, the degree that is difficult to reach practicality at aspects such as specific power, cycle life, charge-discharge performance, cost and Securities for the moment, simultaneously, also there is serious secondary pollution in battery itself; Hybrid-power electric vehicle has the advantage of cell electric vehicle and internal-combustion engines vehicle, but still has emission problem, because two cover power plant are arranged, its driving and control system are more complicated; Fuel cell electric vehicle can be realized zero-emission, and the energy conversion rate height is simple in structure, but the manufacture cost of fuel cell is than higher, and the safety storing of hydrogen, preparation and can all have many problems, have restricted its development and practicability.So people wait in expectation a kind ofly not to be had to pollute, the appearance of the nexhaustible novel automobile power energy, compressed air energy sources has just in time satisfied this demand.
French engineer NEGRE proposed the notion of air motor first from 1991, owing to be the acting medium with pressurized air only, atmosphere environment was not polluted, so be subjected to people's attention immediately.Method, English, U.S., Korea Spro, medium state have all carried out relevant research.But up to now, the research of all relevant Pneumatic automobiles both at home and abroad all is based on original traditional cylinder engine basis basically, that adopts is the reciprocating engine structure, it is technical still to exist very big problem: because its power directly comes from the high-pressure air energy that physical method stores, sealing requirements height to cylinder, friction between piston and the cylinder belongs to kinetic friction, be unfavorable for sealing between the two, in actual applications, cylinder leakage tester is more serious, causes engine efficiency low; Reciprocating piston type compressed air engine low speed is good, but along with rotating speed rising output torque reduces, power reduction, air consumption increase, capacity usage ratio descends; Because the restriction of finite energy on reciprocating piston type compressed air engine volume of cylinder and the car, engine power is little; The design of reciprocating piston type compressed air engine distribution device and decompression control mechanism is perfect inadequately, exists bigger high-pressure air energy loss in the course of conveying.
Summary of the invention
The purpose of this utility model is the efficient feasible engine power system that design one cover is applicable to Pneumatic automobile, overcomes the complex structure of original piston air motor, the shortcoming of control difficulty.The characteristics of this system are: adopt single-screw expander as air motor (as shown in Figure 1), simple in structure, engine system link mechanism is controlled simple; Because single-screw expander is selected nonmetal-metal screw star wheel rotor pair for use, and stress balance on the structure, so have the advantage that wearing and tearing are little, noise is low, the life-span is long; Because single-screw expander is a kind of total flow expander that is applicable to the vapour-liquid two-phase, can adapt to the operating mode that produces drop in the compressed air to do work process because of temperature drop, efficient is higher.
The air motor power system of the utility model design comprises the high pressure air bottle 1 as power source, the modulating valve 2 that is used for operating mode control, heater 3 and single screw-rod engine 4, it is characterized by: after the air that flows out in the high pressure air bottle 1 reaches certain working condition by modulating valve 2 compressed-air actuated flows of control and pressure, entering heater 3 heats, to improve compressed-air actuated acting temperature, the gain output work, be with the super pressure-high temperature air to enter single screw-rod engine 4 acting of expanding afterwards, because single screw-rod engine belongs to the rotary displacement decompressor, along with pressurized air expands, drive the screw rod running and export mechanical works by mechanical work output shaft 5, can finish the air-breathing and exhaust of order of different screw rod conduits simultaneously in the operation process, working procedure is more continuous, acting steadily be easy to control, and distribution device is simple.
In the air motor power system of the utility model design, heater 3 is still selected heating working medium commonly used now, utilize high-temperature-hot-water, air or combustion gas to heat, heater is provided with fin and carries out forced heat exchanging, and pressurized air flows through heater by self overbottom pressure and realizes the heating of flowing.
In the air motor power system of the utility model design, nonmetal-metal screw star wheel rotor pair that single screw-rod engine 4 is selected for use is vibrated for a short time, and the life-span is long.Its engine system can be single-stage expansion form or multistage expansion form according to the Demand Design of actual power, the multistage expansion system can be designed to structures such as series, parallel or series-parallel connection, its mode of heating can adopt pressurized air (being the chopped-off head heating) and the heating before only heating enters the chopped-off head decompressor to enter two kinds of forms of the preceding air of every grade of decompressor (being the classification heating), though the classification heating has increased the complexity of system, output power is higher.
Description of drawings
Fig. 1, the single-screw expander structure diagram;
Fig. 2, the novel pneumatic engine power system schematic of the heating of employing chopped-off head, single-stage expansion;
Fig. 3, the novel pneumatic engine power system schematic that adopts chopped-off head heating, double stage tandem to expand;
Fig. 4 adopts classification heating, three grades of novel pneumatic engine power system schematic that series connection is expanded;
Label is described as follows in the accompanying drawing:
1 high pressure air bottle group; 2 modulating valve; 3 heaters; 4 single screw-rod engines; 5-mechanical work output shaft.
Embodiment
Also in conjunction with the preferred embodiments the technical solution of the utility model is further described according to Figure of description below.
The disclosed air motor power system of the utility model is particularly useful for the short distance traffic instrument, and the utility model adopts single-stage single-screw expander or multistage single-screw expander group as air motor.Be illustrated in figure 1 as the single-screw expander structure diagram, it forms engagement pair by the plane star-wheel of a cylindrical screw and two balanced configurations, is contained in the casing, and screw channel, casing inner wall and star-wheel Topland constitute the element volume of sealing.During running, power passes on the screw axis, drive the star-wheel rotation by screw rod, gas is entered in the screw channel by air aspiration cavity, discharged by exhaust cavity by the vent ports on the cylinder after expanding, the effect of star-wheel is equivalent to the piston of reciprocating expansion engine, when star-wheel relatively moves in screw channel, the element volume of sealing will increase gradually, forms gas expansion for doing work.
The disclosed air motor power system of the utility model, embodiment is: with the carbon fiber high pressure air bottle by vehicle-mounted intensity experiment as power source, the gas cylinder outlet port is provided with the control that modulating valve carries out pressure and flow, make it to satisfy actual working condition requirement, its pressure is mainly recently determined according to the expansion of single-screw expander, expansion ratio is big more, the pressure that modulating valve is controlled is then high more, and flow is mainly decided according to the power demand of motor, power is big more, desired mass flow rate is also big more, in order to improve compressed-air actuated acting ability, need before expanding by heater heats, the mode of heating here can adopt existing hot water heating more freely, air heating, the combustion gas heating means.According to adiabatic expansion acting process analysis, the expansion ratio of single-screw expander is big more, the continuation of the journey mileage that pressurized air produced of limited vehicle-mounted volume is long more, and in fact because the restriction of mechanical technology, the expansion ratio of single-stage single-screw expander can not be too big, therefore, in order to satisfy the demand of high power engine, single screw-rod engine need adopt the form of multistage expansion, through initial theory analysis, during for the heating of employing chopped-off head, when the progression of multistage expansion surpassed 2, it is also few that output work increases, on the contrary complex structure, and when adopting the classification heating, 3 grades are expanded to the best.Connecting mode in the multistage expansion system between single-screw expander has series, parallel and three kinds of forms of series-parallel connection.Thereby at different engine demand, specific embodiments is also different, describes preferred embodiment of the present utility model in detail below in conjunction with accompanying drawing.
The scheme system is referring to Fig. 2, and present embodiment adopts single-stage expansion machine form, and mode of heating can be selected hot water heating, air heating, combustion gas heating means for use, and this system and device is fairly simple, in the vehicular engine that be mainly used in that volume is little, light weight, power is little.
This air motor power system comprises the high pressure air bottle 1 that is used as power source, modulating valve 2, heater 3 and the single screw-rod engine 4 that is used for operating mode control, after the air that flows out in the high pressure air bottle 1 reaches predetermined working condition by modulating valve 2 compressed-air actuated flows of control and pressure, entering heater 3 heats, to improve compressed-air actuated acting temperature, the gain output work, be with the super pressure-high temperature air to enter single screw-rod engine 4 acting of expanding afterwards, by mechanical work output shaft 5 output mechanical works.
The scheme system is referring to Fig. 3, and the system of present embodiment adopts the form that twin-stage expands, chopped-off head heats, and mode of heating can be selected hot water heating, air heating, combustion gas heating means for use.Because two-bed system has optimum expansion ratio under different heating-up temperatures, so need to select the single-screw expander of corresponding optimum expansion ratio coupling.Twin-stage expands and does work, can improve overall expansion ratio, increase power output, the connecting mode of double expansion machine is designed to the series connection form, promptly utilize the air inlet of the exhaust of first order decompressor, and realize coaxial output, make more compact structure as second level decompressor, be easy to control, this system schema is mainly used in the motor of mid power.
This air motor power system comprises the high pressure air bottle 1 as power source, the modulating valve 2 that is used for operating mode control, heater 3 and single screw-rod engine 4, after the air that flows out in the high pressure air bottle 1 reaches predetermined working condition by modulating valve 2 compressed-air actuated flows of control and pressure, entering heater 3 heats, to improve compressed-air actuated acting temperature, the gain output work, enter the acting of expanding in the air motor of forming by the two-stage single-screw expander 4 successively with the super pressure-high temperature air afterwards, the exhaust of previous stage decompressor is as the air inlet of next stage decompressor, and the double expansion machine is realized coaxial connection, jointly by mechanical work output shaft 5 output mechanical works.
The scheme system is referring to Fig. 4, and the system of present embodiment adopts the form of three grades of expansions, classification heating, and mode of heating can be selected hot water heating, air heating, combustion gas heating means for use.To consider the inter-stage allocation problem, need to select three grades of optimum expansion ratio couplings, and in order increasing work efficiency, pressurized air all to heat before entering each grade decompressor, promptly realizes the mode of classification heating.This system schema can be realized bigger power output, is applicable in the more powerful motor car engine.
This air motor power system comprises the high pressure air bottle 1 as power source, the modulating valve 2 that is used for operating mode control, heater 3 and single screw-rod engine 4, after the air that flows out in the high pressure air bottle 1 reaches predetermined working condition by modulating valve 2 compressed-air actuated flows of control and pressure, entering heater 3 heats, to improve compressed-air actuated acting temperature, the gain output work, enter the acting of expanding in the air motor of forming by three grades of single-screw expanders 4 successively with the super pressure-high temperature air afterwards, the acting process is: band super pressure-high temperature air at first expands in first order decompressor and does work, in inflation process owing to produce temperature drop, therefore after the air of being discharged by first order decompressor will enter heater 3 and further heat, the air inlet that is re-used as the second level decompressor acting that reexpands is re-used as the air inlet of third level decompressor after exhaust is still heated by heater 3.Adopt serial fashion to realize three grades of actings of expanding, output work is designed to coaxial form, jointly by mechanical work output shaft 5 output mechanical works.
Should be appreciated that the foregoing description does not limit the utility model in any form, all employings are equal to the technological schemes that form obtained such as alternative or equivalent transformation, all drop within the protection domain of the present utility model.
Claims (8)
1. power system of single-screw expansion engine as pneumatic automobile engine, adopt single-screw expander to replace existing piston formula air motor, described air powered engine power system comprises high pressure air bottle (1), modulating valve (2), heater (3), single screw-rod engine (4) and mechanical work output shaft (5), it is characterized in that:
The high pressure air bottle (1) that high-pressure air is housed is as power source, after the air that flows out in the described high pressure air bottle (1) is controlled compressed-air actuated flow and pressure and is reached predetermined working condition by modulating valve (2), entering heater (3) heats, be with the super pressure-high temperature air to enter single screw-rod engine (4) acting of expanding afterwards, drive the screw rod running also by mechanical work output shaft (5) output mechanical work.
2. power system of single-screw expansion engine as pneumatic automobile engine according to claim 1 is characterized in that: described single screw-rod engine is preferably nonmetal-and metal screw star wheel rotor pair.
3. power system of single-screw expansion engine as pneumatic automobile engine according to claim 2 is characterized in that: described single screw-rod engine adopts the form of single-stage expansion or multistage expansion.
4. power system of single-screw expansion engine as pneumatic automobile engine according to claim 3 is characterized in that: adopt the inter-stage bind mode of multistage expansion single screw-rod engine to comprise series, parallel or three kinds of forms of series-parallel connection.
5. power system of single-screw expansion engine as pneumatic automobile engine according to claim 4 is characterized in that: described heater (3) adopts chopped-off head heating or classification mode of heating to the mode of heating of described single screw-rod engine (4).
6. power system of single-screw expansion engine as pneumatic automobile engine according to claim 5 is characterized in that: when adopting the classification mode of heating, and the preferred 3 grades of expansions of described single screw-rod engine (4); When adopting the chopped-off head mode of heating, the multistage expansion progression of described single screw-rod engine (4) preferably is no more than 2 grades.
7. power system of single-screw expansion engine as pneumatic automobile engine according to claim 1 is characterized in that: described heater (3) adopts the mode of hot water heating, air heating or combustion gas heating.
8. power system of single-screw expansion engine as pneumatic automobile engine according to claim 7 is characterized in that: described heater (3) adopts chopped-off head heating or classification mode of heating to the mode of heating of described single screw-rod engine (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201686241U CN201778838U (en) | 2010-04-23 | 2010-04-23 | Pneumatic automobile engine power system with single-screw expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201686241U CN201778838U (en) | 2010-04-23 | 2010-04-23 | Pneumatic automobile engine power system with single-screw expander |
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| Publication Number | Publication Date |
|---|---|
| CN201778838U true CN201778838U (en) | 2011-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201686241U Expired - Fee Related CN201778838U (en) | 2010-04-23 | 2010-04-23 | Pneumatic automobile engine power system with single-screw expander |
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| Country | Link |
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| CN (1) | CN201778838U (en) |
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2010
- 2010-04-23 CN CN2010201686241U patent/CN201778838U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: GUOCAI GREEN ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: MA ZHONGFANG Effective date: 20111209 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100124 CHAOYANG, BEIJING TO: 100010 DONGCHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20111209 Address after: 100010, 1 floor, building 288, 801 Chaoyangmen Avenue, Dongcheng District, Beijing, 7 Patentee after: China Cailv Energy Technology Co Ltd Address before: 100124 School of environment and energy engineering, Beijing University of Technology, Chaoyang District 100, Beijing Patentee before: Ma Zhongfang |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110330 Termination date: 20130423 |
|
| DD01 | Delivery of document by public notice |
Addressee: China mining investment limited financial accessibility Document name: Notification of Approving Refund |