CN103790700B - For the piston-engined power transfering device of birotor - Google Patents
For the piston-engined power transfering device of birotor Download PDFInfo
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- CN103790700B CN103790700B CN201410030125.9A CN201410030125A CN103790700B CN 103790700 B CN103790700 B CN 103790700B CN 201410030125 A CN201410030125 A CN 201410030125A CN 103790700 B CN103790700 B CN 103790700B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
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Abstract
The invention discloses a kind of for the piston-engined power transfering device of birotor, assembly is driven including internal rotor module, two outer rotor module, torque transfer member and differential, two outer rotor module lay respectively at the both sides composition power cylinder of internal rotor module, and described torque transfer member is connected with line shaft and is positioned at the outside of power cylinder；Described differential drives assembly to be installed in power cylinder, described differential drives assembly to include two set planet fork modules, two tache motorices are included in each described planet fork module, one of them tache motorice is connected with internal rotor module and rotates with internal rotor module, and extending to rotate with torque transfer member in torque transfer member, another one tache motorice is connected with outer rotor module and rotates with outer rotor module.This is used for the piston-engined power transfering device of birotor and has saving space, simple in construction, device reliability height and acting advantage often.
Description
Technical field
Present invention relates generally to Stirling engine field, refer in particular to a kind of for the piston-engined power transfering device of birotor.
Background technology
Stirling engine comprises the plant equipment such as piston engine, compressor, pump, is specifically related to the improvement of engine power hop, and involved method and structure are modified slightly also being adapted for the improvement of the equipment such as pneumatic motor, compressor, pump.
Piston-mode motor mainly has conventional engine and rotary engine two class.Mostly utilize toggle to carry out power transmission on conventional engine, there is the inherent shortcomings such as inertia loading, lateral pressure, movement dead due to it, fail fundamentally to change the present situation that engine power density is low.Rotary engine development application success are the three-apexed rotor rotary piston engines invented by German's wankel (Wankel) nineteen fifty-seven, this engine power density is relatively large, but rotor shapes is complicated, cause manufacturing cost high, and there is the problems such as poor, the fuel economy difference of power performance when sealing difficulty, low speed, so far, the theoretic superiority of rotary engine fails to be not fully exerted.
In order to improve the characteristic of conventional piston formula engine, birotor piston engine becomes study hotspot, but existing birotor piston engine exists following three problem:
First, the box of tricks of engine is placed in outside cylinder body, not only increases axial dimension, causes mechanism itself bulky, and meanwhile, cylinder body and box of tricks junction, axle and axle are nested and cause mechanism's difficulty of processing big, and coupling design between the two installs complexity；The more important thing is, there is a large amount of cantilever beam in external box of tricks, when power transfering device is in the working condition of complexity, external in-house cantilever beam will cause its strength and stiffness can not meet requirement；
Secondly, it is difficult to realize the work done number of times of line shaft every revolution more than 10 times, it is ensured that the not high power density of engine.
Again, the differential of constraint rotor motion drives assembly complicated.Existing differential drives assembly typically to utilize the difficult process component such as elliptic gear, change-speed gearing, non-circular gear, oval gear to realize differential and drives rotor, not only cost is high, and poor reliability, especially require for realizing engine high power density line shaft often transfer to merit number of times more time, the shape of these special type parts can become complicated, difficulty of processing is big；Using the unconventional parts such as isolator, ratchet, spring to realize differential and drive rotor, practical value is poor, and when non-uniform rotation made by rotor, impact is big, and running noises is big；Use the conventional components such as gear, connecting rod to realize differential and drive rotor, have that component number is more, structure is asymmetric, complete machine is difficult to the problems such as balance.
Summary of the invention
The technical problem to be solved in the present invention is: the technical problem existed for prior art, the present invention provide a kind of save that space, mechanism simplifying, device motion credibility be high and acting often for the piston-engined power transfering device of birotor.
For solving above-mentioned technical problem, the technical scheme that the present invention proposes is:
A kind of for the piston-engined power transfering device of birotor, assembly is driven including internal rotor module, two outer rotor module, torque transfer member and differential, two outer rotor module lay respectively at the both sides composition power cylinder of internal rotor module, and described torque transfer member is connected with line shaft and is positioned at the outside of power cylinder；Described differential drives assembly to be installed in power cylinder, described differential drives assembly to include two set planet fork modules, two tache motorices are included in each described planet fork module, one of them tache motorice is connected with internal rotor module and rotates with internal rotor module, and extending to rotate with torque transfer member in torque transfer member, another one tache motorice is connected with outer rotor module and rotates with outer rotor module.
Further improvement as technique scheme:
One end of matching with torque transfer member in described planet fork module is provided with the cam for controlling movement locus.
Described cam is provided with cam curve slot, and the described tache motorice being connected with internal rotor module is slidedly arranged in cam curve slot.
Described cam curve slot be pole electrical path length be periodically variable curve or variation pattern curve groove.
Described torque transfer member and cam are two, lay respectively at the both sides outside power cylinder, and the described tache motorice being connected with internal rotor module stretches out power cylinder and torque transfer member and cam engagement.
Described torque transfer member includes transmitting body, the middle part of described transmission body offers the first centre bore passed for line shaft, centered by the first centre bore, symmetry offers two moment of torsion transmission grooves, and each described planet fork module matches with torque transfer member, and one end is corresponding to be arranged in a moment of torsion transmission groove.
Described internal rotor module and outer rotor module are annular frame-shaped, floor diametrically it is provided with in ring frame, the center of described floor offers the second centre bore passed for line shaft, being symmetrical arranged two rotor connecting holes centered by the second centre bore position, each described planet fork module is connected with one of them rotor connecting hole.
The tache motorice being connected with internal rotor module of each described planet fork module includes that the first rotating shaft, described first rotating shaft are connected in internal rotor module by the first connector, and the end of described first rotating shaft extends to coordinate with torque transfer member；Another one tache motorice includes the second rotating shaft, and described second rotating shaft is supported in the first rotating shaft by connecting plate and is connected with outer rotor module.
Two described first rotating shafts, two described second rotating shafts, internal rotor module, outer rotor module constitute six-bar mechanism.
Described internal rotor module includes internal rotor profile and along internal rotor profile circumferentially spaced internal rotor piston, described outer rotor module includes outer rotor profile and along outer rotor profile circumferentially spaced outer rotor piston, and described internal rotor piston and outer rotor piston are in being crisscross arranged.
Compared with prior art, it is an advantage of the current invention that:
1, the box of tricks of the present invention is built in power cylinder, two rod members of the rotor module of power cylinder inherently six-bar mechanism, changes the general layout that existing box of tricks is arranged apart with power cylinder, is effectively simplified apparatus structure, reduces installation weight；Meanwhile, realize engine high power density and require line shaft often transfer to merit number of times more time, six-bar mechanism of the present invention effectively ensure that the motion credibility of power transfering device with the simple cooperation that coordinates of cam；
2, the structure arrangement that the power cylinder of the present invention, torque transfer member, cam are full symmetric, balance is good, effectively reduce the inertia force shock and vibration of engine, make the stable working of engine, effectively reduce the abrasion of each machine components, improve the service life of engine, meanwhile, effectively reduce the stiffness and strength of cantilever beam.
3, the engine of present invention working chamber number in a cylinder body is the twice of lobe number of curved groove, during line shaft rotates a circle, the blast work done number of times of each working chamber is the half of lobe number, namely the number of times of work done altogether of line shaft each rotation be lobe number square times.On the premise of not significantly changing engine overall dimensions, weight and manufacturing cost, it is achieved that line shaft rotate a circle work done number of times with lobe number become square times change, be effectively improved the power density of engine, power per liter；
4, the mean speed of rotor of the present invention is identical with line shaft, i.e. line shaft often rotates a circle, rotor also completes a gyration, often there is in a flash the working chamber of more than 2 to be in power stroke simultaneously, work done frequency is high, the course of work is steady, effectively reduces the abrasion between machine components, is effectively increased the service life of engine；
5, the number of parts of the present invention is few, working chamber is easy to seal, without complicated valve actuating mechanism.
Accompanying drawing explanation
Fig. 1 is the present invention decomposition texture schematic diagram for the piston-engined power transfering device of birotor；
Fig. 2 is the present invention perspective view for the piston-engined power transfering device of birotor；
Fig. 3 is the motion principle schematic diagram of six-bar mechanism of the present invention；
Fig. 4 is the perspective view of planet fork module of the present invention；
Fig. 5 is the perspective view of outer rotor module of the present invention.
In figure, each label represents:
1, internal rotor module；11, internal rotor profile；12, internal rotor piston；2, outer rotor module；21, outer rotor profile；22, outer rotor piston；3, planet fork module；31, the first rotating shaft；32, the first connector；33, the second rotating shaft；34, connecting plate；4, torque transfer member；41, moment of torsion transmission groove；42, transmission body；5, cam；51, cam curve slot；6, floor.
Detailed description of the invention
As shown in Figures 1 to 5, the present embodiment for the piston-engined power transfering device of birotor, assembly is driven including 1, two outer rotor module 2 of internal rotor module, torque transfer member 4 and differential, two outer rotor module 2 lay respectively at the both sides composition power cylinder of internal rotor module 1, and torque transfer member 4 is connected with line shaft and is positioned at the outside of power cylinder；Differential drives assembly to be installed in power cylinder, differential drives assembly to include two set planet fork modules 3, two tache motorices are included in each planet fork module 3, one of them tache motorice is connected with internal rotor module 1 and rotates with internal rotor module 1, and extending to rotate with torque transfer member 4 in torque transfer member 4, another one tache motorice is connected with outer rotor module 2 and rotates with outer rotor module 2.The differential of the present invention drives assembly to be built in power cylinder, the internal rotor module 1 of power cylinder, outer rotor module 2 form six bar drive mechanisms with two tache motorices in planet fork module 3, change the general layout that existing box of tricks is arranged apart with power cylinder, eliminate bindiny mechanism's (shaft coupling) of box of tricks and power cylinder, it is effectively simplified apparatus structure, reduces installation weight；
In the present embodiment, one end of matching with torque transfer member 4 in planet fork module 3 is provided with cam 5, cam 5 is fixed in differential and drives on the cylinder body of assembly, cam 5 is provided with cam curve slot 51, the tache motorice being connected with internal rotor module 1 is slidedly arranged in cam curve slot 51, described cam curve slot 51, for controlling the movement locus of planet fork module 3, has been effectively ensured the robust motion of planet fork module 3；Meanwhile, effectively achieved the differential motion of rotor by the simple combination of cam 5 and linkage, the motion credibility of power transfering device has been effectively ensured；
In the present embodiment, cam curve slot 51 be pole electrical path length be periodically variable curve, cam curve slot 51 has the ability producing widely varied non-homogeneous operation, the characteristics of motion of rotor can be controlled more broadly, to adapt to the engine requirement to differential driving assembly under different occasion, it it is the inlet chamber volume of more than three times as the volume of guarantee expansion chamber can be realized, it is achieved energy-efficient thermodynamic cycle.In the present embodiment, the variation being shaped as curve of cam curve slot 51, specifically can be described by equation, in the party's formula, for the lobe number of curved groove, take positive integer, the present embodiment is equal to 6, for the constant more than zero, r is roller radius of cam mechanism.In other embodiments, cam curve slot 51 can be the pole such as elliptic curve, cycloid electrical path length be periodically variable all kinds of curve or variation pattern curve groove.
In the present embodiment, torque transfer member 4 and cam 5 are two, lay respectively at the both sides outside power cylinder, the tache motorice being connected with internal rotor module 1 stretches out power cylinder and coordinates with torque transfer member 4 and cam 5, the structure arrangement that torque transfer member 4, cam 5 are full symmetric, balance is good, effectively reduce the inertia force shock and vibration of engine, make the stable working of engine, effectively reduce the abrasion of each machine components, improve the service life of engine, meanwhile, effectively reduce the stiffness and strength of cantilever beam.
In the present embodiment, torque transfer member 4 includes transmitting body 42, the middle part of transmission body 42 offers the first centre bore passed for line shaft, line shaft and the fixing connection of the first centre bore, centered by the first centre bore, symmetry offers two moment of torsion transmission grooves 41, and each planet fork module 3 matches with torque transfer member 4, and one end is corresponding to be arranged in a moment of torsion transmission groove 41.Moment of torsion transmission groove 41 controls the differential drive mechanism reciprocating motion relative to line shaft, and differential drive mechanism sends power to line shaft by torque transfer member 4.
In the present embodiment, internal rotor module 1 and outer rotor module 2 are annular frame-shaped, floor 6 diametrically it is provided with in ring frame, the center of floor 6 offers the second centre bore passed for line shaft, being symmetrical arranged two rotor connecting holes centered by the second centre bore position, each planet fork module 3 is connected with one of them rotor connecting hole.
In the present embodiment, the tache motorice being connected with internal rotor module 1 of each planet fork module 3 includes the first rotating shaft 31, first rotating shaft 31 is articulated with in the rotor connecting hole of internal rotor module 1 by the first connector 32, mandrel, to be connected with internal rotor module 1, the end of the first rotating shaft 31 extends to coordinate with torque transfer member 4 and cam 5；Another one tache motorice includes the second rotating shaft 33, second rotating shaft 33 is supported in the first rotating shaft 31 by connecting plate 34, and be articulated with in the rotor connecting hole of outer rotor module 2 by alignment pin, to be connected with outer rotor module 2, two the first rotating shafts 31, two the second rotating shafts 33, internal rotor module 1, outer rotor module 2 constitute six-bar mechanism.
In the present embodiment, internal rotor module 1 includes internal rotor profile 11 and along internal rotor profile 11 circumferentially spaced internal rotor piston 12, outer rotor module 2 includes outer rotor profile 21 and along outer rotor profile 21 circumferentially spaced outer rotor piston 22, internal rotor piston 12 and outer rotor piston 22 are in being crisscross arranged, on the one hand rotor module is connected with piston and forms power cylinder, is on the other hand two connecting rods in six-bar mechanism.
The general principle of the present invention is to control the change of its interior angle by quadrangle catercorner length in change quadrilateral connecting rod mechanism, and the change of quadrangle catercorner length is controlled by the curve shape of the cam curve slot 51 on cam 5.Each rod member length is the most equal, depending on concrete structure size can require according to design.The catercorner length of this quadrangle is by the shape constraining of cam curve slot 51 and in cyclically-varying, thus the angle between the first rotating shaft 31 and the second rotating shaft 33 the most periodically becomes greatly, diminishes.The enforcement curve of cam curve slot 51 shape is various, and the curve shape of cam curve slot 51 constrains the cyclically-varying of quadrangle interior angle size, and the angle between two rotors is relevant to quadrangle interior angle.Combining, at cam 5 and multi-bar linkage, the differential constituted and drive under component constraint, two rotors are made speed change with the angular speed of cyclic fluctuation and are rotated, and realize working chamber volume and repeat to change repeatedly during line shaft rotates a circle.The change of working chamber volume obviously can be utilized to complete the working cycles of engine.
The operation principle of the present invention: when the line shaft (being connected with torque transfer member 4) at the uniform velocity driving engine rotates a circle, torque transfer member 4 drives planet fork module 3 along the track of the cam curve slot 51 of cam 5, non-uniform rotation centered by main shaft one week, planet pendulum does periodically swing time simultaneously, assume=4, the process that then angular speed between the first rotating shaft 31 and the second rotating shaft 33 changes from small to big the most again will be carried out 4 times, the i.e. rotor process that its angular speed changes from small to big the most again that rotates a circle is also carried out 4 times, so the differential that is made up of cam 5 and multi-bar linkage drives what assembly can retrain two rotor cycle to make variable-speed motion.
As further illustrating of inventive engine operation principle, during the line shaft uniform rotation of engine, under the differential that the free degree is 1 drives the constraint of motion, two rotors are all made speed change with the angular speed of cyclic fluctuation and are rotated so that the working chamber volume between two rotors periodically increases, reduces.Otherwise, fuel explodes in working chamber, and blast pressure promotes two rotors to rotate, and under differential drives the constraint of motion, the differential of rotor is converted into the uniform rotation of line shaft.The engine that the present invention is applied working chamber number in a cylinder body is the twice of the lobe number of aforementioned cam 5 overhead cam curved groove 51, and the blast work done number of times of each working chamber is the half of the lobe number of aforementioned cam curved groove 51 during line shaft rotates a circle, namely rotor rotate a circle inventive engine blast work done number of times be cam curve slot 51 lobe number square times, therefore engine overall dimensions can not significantly changed, on the premise of weight and manufacturing cost, it is capable of line shaft to rotate a circle, work done number of times becomes a square times change with lobe number, thus under identical design weight, power density, power per liter etc. have greatly improved, this characteristic has a wide range of applications.
Engine is a kind of complex machines being made up of many mechanisms and system.Energy to be completed is changed, it is achieved working cycles, it is ensured that the most normal long-time work, it is necessary to possess some mechanisms and the system of indispensability.Inventive engine belongs to piston-mode motor, general principle other piston-mode motors similar.Therefore, in addition to the power train portion of present invention amendment emphatically, must also configure fuel feed system, lubricating system, cooling system, start system etc., the technology of these systems can be entirely by reference to existing reciprocating-piston or the technology of three-apexed rotor rotary engine.
Although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention.Any those of ordinary skill in the art, in the case of without departing from technical solution of the present invention scope, technical solution of the present invention is made many possible variations and modification by the technology contents that all may utilize the disclosure above, or is revised as the Equivalent embodiments of equivalent variations.Therefore, every content without departing from technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments, equivalent variations and modification, all should fall in the range of technical solution of the present invention is protected.
Claims (10)
1. one kind be used for the piston-engined power transfering device of birotor, it is characterised in that include internal rotor module (1), two
Individual outer rotor module (2), torque transfer member (4) and differential drive assembly, two outer rotor module (2) to turn in laying respectively at
The both sides composition power cylinder of submodule (1), described torque transfer member (4) is connected with line shaft and is positioned at outside power cylinder
Side；Described differential drives assembly to be installed in power cylinder, and described differential drives assembly to include two sets planet fork module (3),
Include that two tache motorices, one of them tache motorice are connected also with internal rotor module (1) on each described planet fork module (3)
Rotate with internal rotor module (1), and extend to rotate with torque transfer member (4) in torque transfer member (4), other one
Individual tache motorice is connected with outer rotor module (2) and rotates with outer rotor module (2).
The most according to claim 1 for the piston-engined power transfering device of birotor, it is characterised in that described row
The upper one end of matching with torque transfer member (4) of star fork module (3) is provided with the cam (5) for controlling movement locus.
The most according to claim 2 for the piston-engined power transfering device of birotor, it is characterised in that described convex
Wheel (5) is provided with cam curve slot (51), and the described tache motorice being connected with internal rotor module (1) is slidedly arranged on cam curve slot (51)
In.
The most according to claim 3 for the piston-engined power transfering device of birotor, it is characterised in that described convex
Wheel curved groove (51) be pole electrical path length be periodically variable curve or variation pattern curve groove.
The most according to claim 2 for the piston-engined power transfering device of birotor, it is characterised in that described torsion
Square transferring member (4) and cam (5) are two, lay respectively at the both sides outside power cylinder, described and internal rotor module (1)
The tache motorice being connected stretches out power cylinder and coordinates with torque transfer member (4) and cam (5).
6. according to described in claim 1 to 5 any one for the piston-engined power transfering device of birotor, its feature
Being, described torque transfer member (4) includes transmitting body (42), and the middle part of described transmission body (42) offers for power
The first centre bore that axle passes, centered by the first centre bore, symmetry offers two moment of torsion transmission grooves (41), and each described planet is put
The upper one end of matching with torque transfer member (4) of bar module (3) is corresponding to be arranged in a moment of torsion transmission groove (41).
7. according to described in claim 1 to 5 any one for the piston-engined power transfering device of birotor, its feature
Being, described internal rotor module (1) and outer rotor module (2) are annular frame-shaped, are diametrically provided with in ring frame
Floor (6), the center of described floor (6) offers the second centre bore passed for line shaft, in the second centre bore position being
The heart is symmetrical arranged two rotor connecting holes, and each described planet fork module (3) is connected with one of them rotor connecting hole.
8. according to described in claim 1 to 5 any one for the piston-engined power transfering device of birotor, its feature
Being, the tache motorice being connected with internal rotor module (1) of each described planet fork module (3) includes the first rotating shaft (31),
Described first rotating shaft (31) is connected in internal rotor module (1) by the first connector (32), described first rotating shaft (31)
End extend to coordinate with torque transfer member (4)；Another one tache motorice includes the second rotating shaft (33), described second rotating shaft
(33) it is supported on the first rotating shaft (31) by connecting plate (34) above and to be connected with outer rotor module (2).
The most according to claim 8 for the piston-engined power transfering device of birotor, it is characterised in that two institutes
State the first rotating shaft (31), two described second rotating shafts (33), internal rotor module (1), outer rotor module (2) constitute six bar machines
Structure.
10. according to described in claim 1 to 5 any one for the piston-engined power transfering device of birotor, it is special
Levying and be, described internal rotor module (1) includes internal rotor profile (11) and circumferentially spaced along internal rotor profile (11)
Internal rotor piston (12), described outer rotor module (2) includes outer rotor profile (21) and along outer rotor profile (21) circumference
Spaced outer rotor piston (22), described internal rotor piston (12) and outer rotor piston (22) are in being crisscross arranged.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410030125.9A CN103790700B (en) | 2014-01-22 | 2014-01-22 | For the piston-engined power transfering device of birotor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410030125.9A CN103790700B (en) | 2014-01-22 | 2014-01-22 | For the piston-engined power transfering device of birotor |
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| CN103790700A CN103790700A (en) | 2014-05-14 |
| CN103790700B true CN103790700B (en) | 2016-08-17 |
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| CN201410030125.9A Active CN103790700B (en) | 2014-01-22 | 2014-01-22 | For the piston-engined power transfering device of birotor |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179570B (en) * | 2014-07-09 | 2017-05-17 | 中国人民解放军国防科学技术大学 | Microminiature thermo-motive power generating set |
| CN104314675B (en) * | 2014-09-25 | 2016-09-07 | 中国人民解放军国防科学技术大学 | The power transfering device that a kind of cycloidal cam combines with pendulum disk mechanism |
| CN111664006A (en) * | 2019-03-08 | 2020-09-15 | 方保林 | Reciprocating piston type rotor engine |
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| US5433179A (en) * | 1993-12-02 | 1995-07-18 | Wittry; David B. | Rotary engine with variable compression ratio |
| US5501182A (en) * | 1995-07-17 | 1996-03-26 | Kull; Leo | Peristaltic vane device for engines and pumps |
| US5537973A (en) * | 1995-07-19 | 1996-07-23 | Wittry; David B. | Rotary engine with glow ignition system |
| CN102140960A (en) * | 2011-03-24 | 2011-08-03 | 中国人民解放军国防科学技术大学 | Method for eliminating torsion inertia force of double-rotor piston engine |
| CN202065059U (en) * | 2011-03-24 | 2011-12-07 | 中国人民解放军国防科学技术大学 | Power transmission device for positive displacement machine |
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2014
- 2014-01-22 CN CN201410030125.9A patent/CN103790700B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5433179A (en) * | 1993-12-02 | 1995-07-18 | Wittry; David B. | Rotary engine with variable compression ratio |
| US5501182A (en) * | 1995-07-17 | 1996-03-26 | Kull; Leo | Peristaltic vane device for engines and pumps |
| US5537973A (en) * | 1995-07-19 | 1996-07-23 | Wittry; David B. | Rotary engine with glow ignition system |
| CN102140960A (en) * | 2011-03-24 | 2011-08-03 | 中国人民解放军国防科学技术大学 | Method for eliminating torsion inertia force of double-rotor piston engine |
| CN202065059U (en) * | 2011-03-24 | 2011-12-07 | 中国人民解放军国防科学技术大学 | Power transmission device for positive displacement machine |
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