CN113864193A - Crankshaft assembly, pump body assembly and compressor - Google Patents
Crankshaft assembly, pump body assembly and compressor Download PDFInfo
- Publication number
- CN113864193A CN113864193A CN202111265808.9A CN202111265808A CN113864193A CN 113864193 A CN113864193 A CN 113864193A CN 202111265808 A CN202111265808 A CN 202111265808A CN 113864193 A CN113864193 A CN 113864193A
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- Prior art keywords
- crankshaft
- assembly
- transmission
- pump body
- diaphragm
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0021—Systems for the equilibration of forces acting on the pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/60—Shafts
- F04C2240/601—Shaft flexion
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The application provides a crankshaft assembly, pump body subassembly and compressor. The crankshaft assembly comprises a crankshaft, a first crankshaft and a second crankshaft, wherein the first crankshaft is provided with a first eccentric part, and the second crankshaft is provided with a second eccentric part; when the crankshaft operates, the rotating directions of the first eccentric part and the second eccentric part are opposite. The structure of two crankshaft sections is adopted, each crankshaft section comprises an eccentric part, and the rotating directions of the two eccentric parts are opposite when the crankshaft operates; therefore, the two rollers matched with the two eccentric parts can operate in opposite directions, the state that only a single rotating direction revolving moment exists in the pump body is changed, the two rotating direction revolving moments are utilized to offset balance, and a series of adverse effects caused by unbalanced moment can be obviously improved.
Description
Technical Field
The application belongs to the technical field of compressors, and particularly relates to a crankshaft assembly, a pump body assembly and a compressor.
Background
In the existing double-cylinder compressor, because the upper and lower rollers in the upper and lower cylinders have the same rotating direction, the inside of the pump body only has the rotating moment with a single rotating direction, although the existing double-cylinder compressor adopts a balance block or sets the phase difference of the upper eccentric circle and the lower eccentric circle of a crankshaft to be 180 degrees to offset and balance a part of the rotating moment, the rotating moment with the single rotating direction still exists. The single rotary direction rotary moment in the pump body is difficult to offset balance through the existing double-cylinder compressor pump body structure, so the existing double-cylinder compressor generally has unbalanced pump body rotary moment. Such unbalanced gyroscopic moments can have a periodic adverse effect on the compressor itself and on the external structure of the compressor. For the compressor itself, the unbalanced turning moment can make the internal vibration of the compressor become large, and the stability of the operation of the compressor is influenced. For the external structure of the compressor, the unbalanced rotation moment can cause the connection part with the compressor to be subjected to periodical unbalanced force, and the reliability of the connection part is influenced. It can be seen that the unbalanced gyroscopic moment has a large influence on the service life of the compressor.
Disclosure of Invention
Therefore, the application provides a crankshaft assembly, pump body subassembly and compressor, can solve the problem that unbalanced turning moment brings harmful effects to the compressor among the prior art.
In order to solve the above problem, the present application provides a crankshaft assembly, including:
the crankshaft comprises a first crankshaft and a second crankshaft, wherein the first crankshaft is provided with a first eccentric part, and the second crankshaft is provided with a second eccentric part;
when the crankshaft operates, the rotating directions of the first eccentric part and the second eccentric part are opposite.
Optionally, the first crankshaft and the second crankshaft are provided in segments and on the same axis.
Optionally, the crankshaft assembly further comprises a transmission part, and the first crankshaft is in transmission connection with the second crankshaft through the transmission part.
Optionally, the transmission part comprises a transmission shaft, and two ends of the transmission shaft are in transmission connection with the first crankshaft and the second crankshaft through a gear set; the gear set comprises a first gear set and a second gear set which are arranged at two ends of the transmission shaft respectively, wherein one of the first gear set and the second gear set is in gear engagement transmission, and the other one is in gear belt transmission.
According to another aspect of the present application, there is provided a pump body assembly including a crankshaft assembly as described above.
Optionally, the pump body assembly further comprises a first cylinder assembly and a second cylinder assembly, the first cylinder assembly comprises a first roller, and the first roller is sleeved on the first eccentric portion; the second cylinder assembly comprises a second roller, and the second roller is sleeved on the second eccentric part.
Optionally, the pump body assembly further comprises a partition plate assembly, and the partition plate assembly is arranged between the first cylinder assembly and the second cylinder assembly; the crankshaft assembly comprises a transmission part, and the transmission part is arranged on the partition plate assembly.
Optionally, the partition plate assembly includes a first partition plate and a second partition plate, and the transmission part is erected between the first partition plate and the second partition plate; the first crankshaft penetrates through the first partition plate, and the second crankshaft penetrates through the second partition plate.
Optionally, the partition plate assembly further comprises a third partition plate, and the third partition plate is arranged between the first partition plate and the second partition plate; the end parts of the first crankshaft and the second crankshaft are erected on the third partition plate.
Optionally, the end face gap width of the first crankshaft and the second crankshaft is 1-3 mm.
According to yet another aspect of the present application, there is provided a compressor including the crankshaft assembly as described above or the pump body assembly as described above.
Optionally, the compressor further comprises a housing, the crankshaft assembly comprises a transmission part, and the width of a gap between the transmission part and the housing is 1-5 mm.
The application provides a crankshaft assembly includes: the crankshaft comprises a first crankshaft and a second crankshaft, wherein the first crankshaft is provided with a first eccentric part, and the second crankshaft is provided with a second eccentric part; when the crankshaft operates, the rotating directions of the first eccentric part and the second eccentric part are opposite.
The structure of two crankshaft sections is adopted, each crankshaft section comprises an eccentric part, and the rotating directions of the two eccentric parts are opposite when the crankshaft operates; therefore, the two rollers matched with the two eccentric parts can operate in opposite directions, the state that only a single rotating direction revolving moment exists in the pump body is changed, the two rotating direction revolving moments are utilized to offset balance, and a series of adverse effects caused by unbalanced moment can be obviously improved.
Drawings
FIG. 1 is a schematic structural view of a pump body assembly according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a first crankshaft of an embodiment of the present application;
FIG. 3 is a schematic illustration of a second crankshaft according to an embodiment of the present application;
FIG. 4 illustrates a gear set configuration for a toothed belt in accordance with an embodiment of the present application;
fig. 5 is a schematic structural diagram of a compressor according to an embodiment of the present application.
The reference numerals are represented as:
1. a first crankshaft; 11. a first eccentric portion; 2. a second crankshaft; 21. a second eccentric portion; 3. a drive shaft; 31. a first gear set; 32. a second gear set; 33. a gear belt; 41. a first separator; 42. a second separator; 43. a third partition plate; 5. a housing.
Detailed Description
Referring collectively to fig. 1-5, in accordance with an embodiment of the present application, a crankshaft assembly includes:
the crankshaft comprises a first crankshaft 1 and a second crankshaft 2, wherein a first eccentric part 11 is arranged on the first crankshaft 1, and a second eccentric part 21 is arranged on the second crankshaft 2;
when the crankshaft is operated, the rotation directions of the first eccentric portion 11 and the second eccentric portion 21 are opposite.
The structure of two crankshaft sections is adopted, each crankshaft section comprises an eccentric part, and the rotating directions of the two eccentric parts are opposite when the crankshaft operates; therefore, the two rollers matched with the two eccentric parts can operate in opposite directions, the state that only a single rotating direction revolving moment exists in the pump body is changed, the two rotating direction revolving moments are utilized to offset balance, and a series of adverse effects caused by unbalanced moment can be obviously improved.
In some embodiments, the first crankshaft 1 and the second crankshaft 2 are provided in segments and on the same axis.
The two axes of the first crankshaft 1 and the second crankshaft 2 which are arranged in sections are arranged on the same axis, and when the two crankshafts rotate in opposite directions, the rotating moment in the whole pump body can be greatly offset.
In some embodiments, the crankshaft assembly further comprises a transmission portion, and the first crankshaft 1 is in transmission connection with the second crankshaft 2 through the transmission portion.
The first crankshaft 1 and the second crankshaft 2 are in transmission connection through the transmission part, so that the same power mechanism is adopted to drive the first crankshaft 1 and the second crankshaft 2 to run, and the structures of the power mechanisms required by the first crankshaft 1 and the second crankshaft 2 are simplified.
In some embodiments, the transmission part comprises a transmission shaft 3, and both ends of the transmission shaft 3 are in transmission connection with the first crankshaft 1 and the second crankshaft 2 through a gear set; the gear set comprises a first gear set 31 and a second gear set 32 which are respectively arranged at two ends of the transmission shaft 3, wherein one of the first gear set 31 and the second gear set 32 is in gear engagement transmission, and the other one is in gear transmission through a gear belt 33.
The transmission part adopts the transmission shaft 3 combined with a gear set, so that the transmission efficiency is high; one gear set is a gear belt 33, and the other gear set is in tooth meshing, so that the first crankshaft 1 and the second crankshaft 2 achieve the purpose of opposite rotating directions under the action of the same power mechanism.
According to another aspect of the present application, there is provided a pump body assembly including a crankshaft assembly as described above.
In some embodiments, the pump body assembly further comprises a first cylinder assembly and a second cylinder assembly, the first cylinder assembly comprises a first roller, and the first roller is sleeved on the first eccentric portion 11; the second cylinder assembly comprises a second roller, and the second roller is sleeved on the second eccentric part 21.
In the pump body assembly structure, the rollers in the two cylinders are respectively sleeved on the first eccentric part 11 and the second eccentric part 21, so that the revolving moment of the pump body assembly is greatly weakened in the compression process, and the stability of the pump body assembly is improved.
In some embodiments, the pump body assembly further comprises a diaphragm assembly disposed between the first cylinder assembly and the second cylinder assembly; the crankshaft assembly comprises a transmission part, and the transmission part is arranged on the partition plate assembly.
The crankshaft assembly is arranged on the partition plate assembly between the two cylinders, and the transmission part is fixed by the partition plate assembly, so that the whole structure is compact, the transmission torque is reduced, and the transmission efficiency is improved.
In some embodiments, the partition plate assembly includes a first partition plate 41 and a second partition plate 42, and the transmission part is erected between the first partition plate 41 and the second partition plate 42; the first crankshaft 1 is disposed through the first partition plate 41, and the second crankshaft 2 is disposed through the second partition plate 42.
Preferably, the baffle plate assembly further comprises a third baffle plate 43, wherein the third baffle plate 43 is arranged between the first baffle plate 41 and the second baffle plate 42; the end portions of the first crankshaft 1 and the second crankshaft 2 are both erected on the third partition plate 43.
The pump body assembly is divided by a third partition plate 43, and the main parts of the first crankshaft 1 and the second crankshaft 2 are respectively arranged at two sides of the third partition plate 43 and respectively do rotary motion; the first clapboard 41 supports the first crankshaft 1, and the combination of the third clapboard 43 and the first clapboard 41 is beneficial to the stable operation of the gear set at the end of the transmission part; similarly, the second partition plate 42 supports the second crankshaft 2, and the combination of the second partition plate 42 and the third partition plate 43 is beneficial to the stable operation of the gear set at the end of the transmission part.
In some embodiments, the end gap width of the first crankshaft 1 and said second crankshaft 2 is 1-3 mm.
According to yet another aspect of the present application, there is provided a compressor including the crankshaft assembly as described above or the pump body assembly as described above.
This application compressor adopts foretell bent axle subassembly or pump body subassembly, and the gyroscopic moment equilibrium obtains improving, can not make the inside vibration grow of compressor, has improved the stability of compressor operation. And for the external structure of the compressor, the rotary moment balance is good, the part connected with the compressor can not be subjected to the action of periodic unbalanced force, and the reliability of the connected part is improved.
In some embodiments, the compressor further comprises a housing 5, and the crankshaft assembly comprises a transmission part, and the width of a gap between the transmission part and the housing 5 is 1-5 mm.
The specific structure is as shown in fig. 1, in order to enable the first roller and the second roller in the pump body assembly to simultaneously perform opposite rotary motions on the same axis, the crankshaft is divided into a first crankshaft 1 and a second crankshaft 2, so that the first crankshaft 1 and the second crankshaft 2 can independently perform rotary motions, the first roller and the second roller are respectively sleeved on eccentric parts of the first crankshaft 1 and the second crankshaft 2, and then a gear and a gear belt 33 are added for transmission, so that the first crankshaft 1 and the second crankshaft 2 perform opposite rotary motions through the transmission of the gear and the gear belt 33, and the first roller and the second roller are driven to perform opposite rotary motions.
The power transmission route shown in fig. 1 is: the motor rotor (forward rotation) → the first crankshaft 1 (forward rotation) → the second gear group 32 → the gear belt 33 (forward rotation) → the propeller shaft 3 (forward rotation) → the first gear group 31 → the second crankshaft 2 (reverse rotation).
The long shaft part of the first crankshaft 1 is closely matched with a rotor in a compressor motor, after the rotor is electrified, the rotor rotates and drives the first crankshaft 1 to rotate, at the moment, a first roller closely matched with the eccentric part of the first crankshaft 1 rotates along with the first crankshaft, and the first roller rotates in a first cylinder to compress gas. The short shaft part of the first crankshaft 1 connects the gear of the second gear set 32 to the first crankshaft 1 by flat key: the first crankshaft 1 rotates to drive the gear to rotate, the gear drives the gear on the transmission shaft 3 to rotate through the gear belt 33, and the rotation directions of the two gears are consistent due to the transmission through the gear belt 33.
The rotation of the first crankshaft 1 is transmitted to the second crankshaft 2 through the transmission shaft 3, and the transmission gear on the second crankshaft 2 is directly meshed with the gear on the transmission shaft 3, so that the rotation directions of the two gears are opposite. Therefore, if the rotation direction of the first crankshaft 1 is normal, the rotation direction of the second crankshaft 2 is reverse through the transmission of the gear and the gear belt 33, and the purpose of realizing the simultaneous normal and reverse rotation of the upper and lower crankshafts is achieved.
Three partition plates are provided between the two cylinders, and a first partition plate 41 is installed and provided at a short shaft portion of the first crankshaft 1 between the gear and the eccentric portion of the first crankshaft 1. The third partition plate 43 is installed and disposed at the outermost side of the short shaft portion of the first crankshaft 1. The second partition 42 is provided between the gear and the second cylinder on the second crankshaft 2, wherein the transmission shaft 3 and the gear are fixed by the first partition 41, the third partition 43 and the second partition 42.
Particularly preferably, the gap between the gear belt 33 and the shell 5 is set to be 1-5 mm; the short shaft part of the first crankshaft 1 and the short shaft part of the second crankshaft 2 are both arranged in the third partition plate 43, and the axial gap between the end surfaces of the first crankshaft and the second crankshaft is set to be 1-3 mm.
Furthermore, the long shaft parts of the first crankshaft 1 and the second crankshaft 2 are provided with tail grooves, the angles of the tail grooves are consistent with those of the eccentric parts, and the phase difference of the angles of the tail grooves of the upper crankshaft and the lower crankshaft can be 0 by using corresponding tools in the assembling process, so that the purpose of 0 phase difference of the upper eccentric circle and the lower eccentric circle is achieved.
Furthermore, according to different sizes of compressors, the transmission ratio is 1 by changing the parameters of each transmission gear, so that the purpose of consistent rotating speed of the first crankshaft 1 and the second crankshaft 2 is achieved.
It is not hard to see this application novel pump body simple structure, the gear of adoption is small in quantity, gear drive mechanism occupation space is little, the assembly is simple, easy design and input production to with the high degree of generalization of series, design, manufacturing cost are lower, realize easily and reduce unbalanced moment and have apparent effect.
It is easily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (12)
1. A crankshaft assembly, comprising:
the crankshaft comprises a first crankshaft (1) and a second crankshaft (2), wherein a first eccentric part (11) is arranged on the first crankshaft (1), and a second eccentric part (21) is arranged on the second crankshaft (2);
when the crankshaft is operated, the rotating directions of the first eccentric part (11) and the second eccentric part (21) are opposite.
2. The crankshaft assembly according to claim 1, characterized in that the first crankshaft (1) and the second crankshaft (2) are arranged in segments and on the same axis.
3. The crankshaft assembly as claimed in claim 2, further comprising a transmission portion, wherein the first crankshaft (1) is in transmission connection with the second crankshaft (2) via the transmission portion.
4. The crankshaft assembly as claimed in claim 3, characterized in that the transmission part comprises a transmission shaft (3), both ends of the transmission shaft (3) are in transmission connection with the first crankshaft (1) and the second crankshaft (2) through a gear set; the gear set comprises a first gear set (31) and a second gear set (32) which are respectively arranged at two ends of the transmission shaft (3), wherein one of the first gear set (31) and the second gear set (32) is in transmission through tooth meshing, and the other one is in transmission through a gear belt (33).
5. A pump body assembly, including a crankshaft assembly according to any one of claims 1 to 4.
6. The pump body assembly according to claim 5, further comprising a first cylinder assembly and a second cylinder assembly, wherein the first cylinder assembly comprises a first roller, and the first roller is sleeved on the first eccentric portion (11); the second air cylinder assembly comprises a second roller, and the second roller is sleeved on the second eccentric part (21).
7. The pump body assembly of claim 6, further comprising a diaphragm assembly disposed between the first cylinder assembly and the second cylinder assembly; the crankshaft assembly comprises a transmission part, and the transmission part is arranged on the partition plate assembly.
8. The pump body assembly according to claim 7, characterized in that the diaphragm assembly comprises a first diaphragm (41) and a second diaphragm (42), the transmission portion being bridged between the first diaphragm (41) and the second diaphragm (42); the first crankshaft (1) penetrates through the first partition plate (41), and the second crankshaft (2) penetrates through the second partition plate (42).
9. The pump body assembly according to claim 8, characterized in that said diaphragm assembly further comprises a third diaphragm (43), said third diaphragm (43) being interposed between said first diaphragm (41) and said second diaphragm (42); the end parts of the first crankshaft (1) and the second crankshaft (2) are erected on the third partition plate (43).
10. The pump block assembly according to claim 9, characterized in that the end gap width of the first crankshaft (1) and the second crankshaft (2) is 1-3 mm.
11. A compressor comprising a crankshaft assembly according to any one of claims 1 to 4 or a pump body assembly according to any one of claims 5 to 10.
12. The compressor of claim 11, further comprising a housing (5), wherein the crankshaft assembly includes a transmission portion, and a gap between the transmission portion and the housing (5) is 1-5mm in width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111265808.9A CN113864193A (en) | 2021-10-28 | 2021-10-28 | Crankshaft assembly, pump body assembly and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111265808.9A CN113864193A (en) | 2021-10-28 | 2021-10-28 | Crankshaft assembly, pump body assembly and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113864193A true CN113864193A (en) | 2021-12-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111265808.9A Pending CN113864193A (en) | 2021-10-28 | 2021-10-28 | Crankshaft assembly, pump body assembly and compressor |
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| CN (1) | CN113864193A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5877197A (en) * | 1981-10-31 | 1983-05-10 | Matsushita Electric Ind Co Ltd | Sealed type compressor |
| JPH11117997A (en) * | 1997-10-15 | 1999-04-27 | Otics Corp | Balance shaft device |
| CN1264453A (en) * | 1997-07-15 | 2000-08-23 | 新动力概念有限公司 | Cantilever crank stirling cycle machine set |
| EP1806475A1 (en) * | 2006-01-09 | 2007-07-11 | Samsung Electronics Co., Ltd. | Rotary compressor |
| CN103016613A (en) * | 2012-12-20 | 2013-04-03 | 中国船舶重工集团公司第七一一研究所 | Contra-rotating balance method and structure for removing vibrating moment of mechanical equipment |
| CN103671704A (en) * | 2012-09-26 | 2014-03-26 | 重庆长安汽车股份有限公司 | Three-cylinder engine balance shaft system |
| WO2014162144A1 (en) * | 2013-04-05 | 2014-10-09 | Osp Engines Limited | Opposed piston engine |
| CN109281835A (en) * | 2018-10-24 | 2019-01-29 | 中北大学 | A kind of automatic balancing rotor group based on slide valve pump |
| CN111425558A (en) * | 2020-04-21 | 2020-07-17 | 江苏大学 | Concentric shaft balancing device of three-cylinder engine |
-
2021
- 2021-10-28 CN CN202111265808.9A patent/CN113864193A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5877197A (en) * | 1981-10-31 | 1983-05-10 | Matsushita Electric Ind Co Ltd | Sealed type compressor |
| CN1264453A (en) * | 1997-07-15 | 2000-08-23 | 新动力概念有限公司 | Cantilever crank stirling cycle machine set |
| JPH11117997A (en) * | 1997-10-15 | 1999-04-27 | Otics Corp | Balance shaft device |
| EP1806475A1 (en) * | 2006-01-09 | 2007-07-11 | Samsung Electronics Co., Ltd. | Rotary compressor |
| CN103671704A (en) * | 2012-09-26 | 2014-03-26 | 重庆长安汽车股份有限公司 | Three-cylinder engine balance shaft system |
| CN103016613A (en) * | 2012-12-20 | 2013-04-03 | 中国船舶重工集团公司第七一一研究所 | Contra-rotating balance method and structure for removing vibrating moment of mechanical equipment |
| WO2014162144A1 (en) * | 2013-04-05 | 2014-10-09 | Osp Engines Limited | Opposed piston engine |
| CN109281835A (en) * | 2018-10-24 | 2019-01-29 | 中北大学 | A kind of automatic balancing rotor group based on slide valve pump |
| CN111425558A (en) * | 2020-04-21 | 2020-07-17 | 江苏大学 | Concentric shaft balancing device of three-cylinder engine |
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