Rotary piston type gas compression device

Abstract

The invention relates to a compressor, in particular to a rotary piston type gas compression device which solves the problems that an existing compressor is complex in structure and high in machining cost, the rotary piston type gas compression device comprises a driving shaft and a piston assembly, and the piston assembly comprises a piston cylinder, a piston and N baffle assemblies arranged on the cylinder wall in the circumferential direction; n is an integer greater than or equal to 1; the piston is fixedly arranged on the driving shaft in a sleeving mode and located in a cavity of the piston cylinder. The baffle assembly comprises a hinge column, an elastic reset structure and a hinge baffle connected with the peripheral face of the hinge column. The hinge column is hinged to the cylinder wall. The elastic reset structure is used for providing elastic force for the hinge baffle. The hinge baffle can swing back and forth around the hinge column under the action of the elastic force of the elastic reset structure and the pressure of the side wall of the piston, an air inlet channel and an air outlet channel are formed in the positions, corresponding to the baffle assembly, of the cylinder wall, and an air inlet space and an air compression space with variable volumes are formed between the piston and the piston cylinder through rotation of the piston, so that external low-pressure air is sucked, compressed and exhausted.

Description

TECHNICAL FIELD

[0001] The present application relates to a compressor, in particular to a rotary piston gas compression device. BACKGROUND

[0002] At present, air conditioners mainly compress gas through a compressor to realize refrigeration. Common compressors include swash plate compressors, scroll compressors, and rotary compressors. The swash plate compressor and the scroll compressor commonly used in new energy vehicles have complex structures and large volumes. Household air conditioners commonly use double or triple rotary compressors. The rotors of the double or triple rotary compressors are connected by a crankshaft in the axial direction, and the rotors are eccentric rotors. When the two or three eccentric rotors rotate, the excess torque can be offset by each other, so that excess vibration is not generated. However, this requires that the machining precision, matching precision, and counterweight of the eccentric rotors and the crankshaft all reach a very high level, otherwise excess vibration will still be generated, affecting the user experience. Because of the requirement for machining precision, the machining cost of these components has been high. SUMMARY

[0003] The present application aims to solve the technical problems of the existing compressor, such as complex structure and high machining cost, and provides a rotary piston gas compression device.

[0004] In order to achieve the above-mentioned application purpose, the present application provides the following technical solutions:

[0005] A rotary piston gas compression device, characterized in that it comprises a driving shaft and a piston assembly.

[0006] The piston assembly comprises a piston cylinder, a piston, and N baffle assemblies; N is an integer greater than or equal to 1.

[0007] The cylinder wall of the piston cylinder is a cylindrical cavity structure.

[0008] The piston is fixed on the driving shaft and located in the cavity of the piston cylinder. The cross section of the piston has N end portions, and each end portion abuts against the inner side of the cylinder wall of the piston cylinder.

[0009] The N baffle assemblies are arranged circumferentially on the cylinder wall of the piston cylinder. The baffle assembly comprises a hinge column (51), an elastic reset structure, and a hinge baffle connected with the outer circumferential surface of the hinge column.

[0010] The hinge column is hinged to the cylinder wall of the piston cylinder. The elastic reset structure is used to provide an elastic force to the hinge baffle. The hinge baffle can swing back and forth around the hinge column under the action of the elastic force of the elastic reset structure and the pressure of the piston side wall.

[0011] Corresponding to the N shutter assemblies, the piston cylinder wall is provided with corresponding intake passages and exhaust passages, the intake passages being used for the communication between the external low-pressure gas and the piston cylinder cavity, and the exhaust passages being used for the communication between the piston cylinder cavity and the external high-pressure gas equipment;

[0012] When the piston rotates to the abutment between the hinge shutter and the end of the piston, the hinge shutter is completely pressed into the piston cylinder wall, the exhaust passage is closed by the hinge shutter, and the intake passage is communicated with the intake space;

[0013] When the piston continues to rotate to the abutment between the hinge shutter and the adjacent end of the piston, the hinge shutter is popped out of the piston cylinder wall; the piston side wall, the piston cylinder and the side of the hinge shutter away from the piston form a gradually reduced compression space, which is communicated with the exhaust passage; the piston side wall, the piston cylinder and the side of the hinge shutter close to the piston form an intake space with a corresponding increased volume, which is communicated with the intake passage.

[0014] Further, the N ends of the piston are provided with elastic structures for abutting and sealing with the piston cylinder wall;

[0015] The elastic structure includes a flexible outer wall located at the end of the piston and integrated with the piston;

[0016] Alternatively, the elastic structure includes a sealing piece mounting groove provided at the end of the piston, a sealing block provided in the sealing piece mounting groove, and an elastic piece located between the sealing piece mounting groove and the sealing block.

[0017] Alternatively, the elastic structure includes a sealing piece mounting groove provided at the end of the piston and an elastic piece provided in the sealing piece mounting groove.

[0018] Further, the cross section of the piston is a regular polygon with N sides, and N is greater than or equal to 3.

[0019] Further, the shutter assembly further includes a wear-resistant head provided at the abutting end of the hinge shutter.

[0020] Further, the elastic reset structure includes a reset plate connected to the outer peripheral surface of the hinge column and a reset spring; the reset spring is located between the piston cylinder and the reset plate, and is used to provide elastic force to the reset plate.

[0021] Alternatively, the elastic reset structure includes a reset spring, which is located between the piston cylinder and the hinge shutter, and is used to provide elastic force to the hinge shutter.

[0022] Further, a one-way valve is further provided on the exhaust passage.

[0023] Further, the piston cylinder includes a cylinder wall and an upper shutter and a lower shutter provided at the top and bottom of the cylinder wall, respectively.

[0024] Further, the cylinder wall is integrally provided with the upper baffle plate or the lower baffle plate.

[0025] Further, the cylinder wall includes two upper and lower split half cylinder walls, and each half cylinder wall is integrally provided with the upper baffle plate or the lower baffle plate.

[0026] Further, the inlet of the gas inlet channel is located on the lower baffle plate or the upper baffle plate, and the outlet of the gas outlet channel is located on the upper baffle plate or the lower baffle plate.

[0027] Further, the inner side surface of the piston cylinder wall is a cylindrical surface.

[0028] Compared with the prior art, the beneficial effects of the present application are:

[0029] (1) The rotating piston type gas compression device provided by the present application has the following advantages: the piston is fixedly sleeved on the driving end and located in the inner cavity of the piston cylinder, the piston is driven to make a concentric rotary motion by the driving shaft, the volume change between the piston and the piston cylinder is achieved by the rotation of the piston, the intake, compression and discharge of external low-pressure gas are achieved, compared with the traditional double or triple rotor type compressor, the piston does not need to be eccentric, and one piston can be used, and a crankshaft is not needed, thereby reducing the structural complexity and processing cost.

[0030] (2) The rotating piston type gas compression device provided by the present application is provided with an elastic structure at the end of the piston for abutting and sealing against the cylinder wall of the piston cylinder, the elastic structure includes a flexible outer wall located at the end of the piston and integrated with the piston; or the elastic structure includes a sealing piece mounting groove arranged at the end of the piston, a sealing block arranged in the sealing piece mounting groove, and an elastic piece located between the sealing piece mounting groove and the sealing block; or the elastic structure includes a sealing piece mounting groove arranged at the end of the piston and an elastic piece arranged in the sealing piece mounting groove. In this way, the gap between the piston and the cylinder wall of the piston cylinder can be self-adaptively adjusted, the end of the piston can be ensured to always abut against the cylinder wall of the piston cylinder, and the sealing effect can be ensured, so that the machining precision of the piston and the cylinder wall of the piston cylinder can be reduced, and the cost can be saved.

[0031] (3) The piston cylinder of the rotating piston type gas compression device provided by the present application includes a cylinder wall and upper and lower baffle plates arranged at the top and bottom of the cylinder wall, respectively, or the cylinder wall is integrally provided with the upper baffle plate or the lower baffle plate; or the cylinder wall includes two upper and lower split half cylinder walls, and each half cylinder wall is integrally provided with the upper baffle plate or the lower baffle plate. In this way, the machining and assembly processes can be saved, and the cost can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a three-dimensional structure diagram of an embodiment of the rotating piston type gas compression device of the present application Figure 1 ;

[0033] Figure 2 A schematic view of a three-dimensional structure of an embodiment of the present application Figure 2 (not shown with the upper baffle and the one-way valve);

[0034] Figure 3 A top view of Figure 2

[0035] Figure 4 A schematic view of the structure in which the cylinder wall of the piston cylinder and the lower baffle are integrally arranged in an embodiment of the present application;

[0036] Figure 5 A schematic view of the structure in which the half cylinder wall is integrally arranged with the upper baffle or the lower baffle in an embodiment of the present application;

[0037] Figure 6 A schematic view of the structure in which the elastic structure is a flexible outer wall integrated with the piston in an embodiment of the present application.

[0038] The reference signs are explained as follows:

[0039] 1 - drive shaft, 2 - piston, 21 - weight-reducing hole; 3 - piston cylinder, 31 - air inlet, 32 - air outlet, 33 - upper baffle, 34 - lower baffle; 4 - sealing block, 5 - baffle assembly, 51 - hinged column, 52 - reset plate, 53 - hinge baffle, 54 - wear-resistant head; 6 - one-way valve, 7 - reset spring. DETAILED DESCRIPTION

[0040] The present application is further described below in conjunction with the drawings and exemplary embodiments.

[0041] With reference to Figures 1-6 , a rotary piston gas compression device of the present application comprises a drive shaft 1 and a piston assembly, the piston assembly comprising a piston cylinder 3, a piston 2 and N baffle assemblies 5 arranged circumferentially on the cylinder wall of the piston cylinder 3, N being an integer greater than or equal to 1.

[0042] The cylinder wall of the piston cylinder 3 is a cylindrical cavity structure, and the inner side of the cylinder wall of the piston cylinder 3 is a cylindrical surface. The piston 2 is fixedly sleeved on the drive shaft 1 and located in the cavity of the piston cylinder 3. The drive shaft 1 is connected with an external power source, thereby driving the piston 2 to rotate in the cavity of the piston cylinder 3. In order to reduce the weight, a weight-reducing hole 21 is also formed on the piston 2. The cross section of the piston 2 has N end portions, and each of the N end portions abuts against the inner side of the cylinder wall of the piston cylinder 3. In this embodiment, the cross section of the piston 2 is a regular polygon with N sides, N is greater than or equal to 3, and three baffle assemblies 5 are arranged circumferentially on the cylinder wall of the piston cylinder 3. In order to facilitate manufacturing, N is 3 in this embodiment, and the cross section of the piston 2 is a regular triangle with three end portions.

[0043] ​The baffle assembly 5 includes a hinge post 51, a hinge baffle 53 connected to the outer peripheral surface of the hinge post 51, and an elastic reset structure. The hinge post 51 is hinged to the cylinder wall of the piston cylinder 3. The elastic reset structure provides elastic force to the hinge baffle 53. A wear-resistant head 54 is provided at the contact end between the hinge baffle 53 and the outer wall of the piston 2 to improve the service life of the hinge baffle 53. In this way, the hinge baffle 53 can swing back and forth around the hinge post 51 under the elastic force of the elastic reset structure and the pressure of the side wall of the piston 2. In this embodiment, the elastic reset structure includes a reset plate 52 connected to the outer peripheral surface of the hinge post 51 and a reset spring 7. The reset spring 7 is located between the piston cylinder 3 and the reset plate 52 and is used to provide elastic force to the reset plate 52, and then transmit the elastic force to the hinge baffle 53 through the hinge post 51. The structure is simple. Alternatively, the elastic reset structure may only include a reset spring 7, which is located directly between the piston cylinder 3 and the hinge baffle 53. The reset spring 7 directly provides elastic force to the hinge baffle 53. Different elastic reset structures can be selected according to the actual situation.

[0044] In order to cooperate with the hinge baffle 53 and make the rotation smoother, the cross-section of the piston 2 in this embodiment is a special equilateral triangle-Leno triangle, with all three sides being arc-shaped. When the abutting end of the hinge baffle 53 slides on the outer wall of the piston 2, it is smoother and will not hinder the rotation of the piston 2.

[0045] In this embodiment, the piston cylinder 3 includes a cylinder wall and an upper baffle 33 and a lower baffle 34 respectively disposed at the top and bottom of the cylinder wall, as shown in the figure. Figure 1 As shown; to save on machining and assembly processes and reduce costs, the cylinder wall and the upper baffle 33 or lower baffle 34 can be integrated as one piece, such as... Figure 4 As shown, this is the case where the cylinder wall and the lower baffle 34 are integrally formed; or, as... Figure 5 As shown, the cylinder wall includes two upper and lower half-cylinder walls, and each half-cylinder wall is integrally formed with the upper baffle 33 or the lower baffle 34.

[0046] On the cylinder wall of piston cylinder 3, corresponding air inlet ducts 31 and air outlet ducts 32 are provided for the three baffle assemblies 5. Air inlet duct 31 is used for communication between external low-pressure gas and the inner cavity of piston cylinder 3, and air outlet duct 32 is used for communication between the inner cavity of piston cylinder 3 and external high-pressure gas-using equipment. The outlet of air inlet duct 31 and the inlet of air outlet duct 32 are both located on the inner side of piston cylinder wall 3. The inlet of air inlet duct 31 is located on the lower baffle 34 or on the upper baffle 33, and the outlet of air outlet duct 32 is located on the upper baffle 33 or on the lower baffle 34, which can be selected according to the actual situation. In this embodiment, the inlet of air inlet duct 31 is located on the lower baffle 34, and the outlet of air outlet duct 32 is located on the upper baffle 34. A one-way valve 6 is correspondingly provided on the air outlet duct 32. In this embodiment, the one-way valve 6 is located at the outlet position of air outlet duct 32 on the upper baffle 34.

[0047] When piston 2 rotates to the point where hinge baffle 53 abuts against the end of piston 2, hinge baffle 53 is completely pressed into the cylinder wall of piston cylinder 3. At this time, the inlet of air outlet 32 ​​can be set corresponding to the side of hinge baffle 53 away from piston 2 or corresponding to the outer end face of hinge baffle 53. In this way, when hinge baffle 53 is completely pressed into the cylinder wall of piston cylinder 3, it can seal air outlet 32. In this embodiment, in order to ensure the sealing effect, such as Figure 3 As shown, the inlet of the exhaust duct 32 corresponds to the side of the hinge baffle 53 away from the piston 2, while the intake duct 31 is connected to the intake space at this time; when the piston 2 continues to rotate until the outer wall between the hinge baffle 53 and the adjacent end of the piston 2 abuts, the hinge baffle 53 pops out of the cylinder wall of the piston cylinder 3; the side wall of the piston 2, the piston cylinder 3 and the side of the hinge baffle 53 away from the piston 2 form a compressed air space with a gradually decreasing volume, which is connected to the exhaust duct 32; the side wall of the piston 2, the piston cylinder 3 and the side of the hinge baffle 53 near the piston 2 form an intake space with a correspondingly increasing volume, which is connected to the intake duct 31.

[0048] To ensure sealing performance while reducing the machining precision of the cylinder wall of piston cylinder 3 and the side wall of piston 2, elastic structures for sealing against the cylinder wall of piston cylinder 3 are provided at the three ends of piston 2. These elastic structures come in three forms, the first being... Figure 3 As shown, it includes a seal mounting groove at the end of piston 2, a sealing block 4 disposed within the seal mounting groove, and an elastic element located between the seal mounting groove and the sealing block 4. The elastic force of the elastic element ensures that the sealing block 4 always abuts against the cylinder wall of piston cylinder 3, and a sealing strip is provided between the sealing block 4 and the side wall of the seal mounting groove to ensure that gas does not leak from the seal mounting groove. Alternatively, as Figure 6 As shown, the elastic structure includes a flexible outer wall located at the end of piston 2 and integrally formed with piston 2; or, the elastic structure includes a seal mounting groove located at the end of piston 2 and an elastic element located within the seal mounting groove, using the elastic force of the elastic element to achieve sealing. The elastic element can be made of high-temperature resistant rubber. This allows for adaptive adjustment of the gap between piston 2 and the cylinder wall of piston cylinder 3, eliminating the need for high machining and fitting precision to ensure a sealing effect, and significantly reducing processing costs.

[0049] When in use, external low-pressure gas enters through the inlet of the air intake duct 31 and enters the intake space inside the piston cylinder 3 through the outlet of the air intake duct 31. As the drive shaft 1 drives the piston 2 to rotate, the low-pressure gas enters the compression space. As the piston 2 rotates further, the volume of the compression space gradually shrinks, the low-pressure gas is compressed, and finally discharged from the outlet duct 32 into the external high-pressure gas-using equipment.

[0050] The embodiments described above are merely illustrative of specific implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A rotary piston gas compression device, characterized by: The rotary piston gas compression device comprises a driving shaft (1) and a piston assembly; The piston assembly comprises a piston cylinder (3), a piston (2) and N baffle assemblies (5); N is an integer greater than or equal to 1; The cylinder wall of the piston cylinder (3) is a cylindrical cavity structure; The piston (2) is fixedly sleeved on the driving shaft (1) and located in the cavity of the piston cylinder (3); the cross section of the piston (2) has N end portions, and each of the N end portions abuts against the inner side of the cylinder wall of the piston cylinder (3); The N baffle assemblies (5) are circumferentially arranged on the cylinder wall of the piston cylinder (3); the baffle assembly (5) comprises a hinge column (51), an elastic reset structure and a hinge baffle (53) connected with the outer circumferential surface of the hinge column (51); The hinge column (51) is hinged with the cylinder wall of the piston cylinder (3); the elastic reset structure is used for providing elastic force to the hinge baffle (53); the hinge baffle (53) can swing back and forth around the hinge column (51) under the action of the elastic force of the elastic reset structure and the side wall pressure of the piston (2); The cylinder wall of the piston cylinder (3) is provided with corresponding gas inlet passages (31) and gas outlet passages (32) corresponding to the N baffle assemblies (5); the gas inlet passages (31) are used for the communication between the external low-pressure gas and the inner cavity of the piston cylinder (3); the gas outlet passages (32) are used for the communication between the inner cavity of the piston cylinder (3) and the external high-pressure gas equipment; When the piston (2) rotates to the abutment between the hinge baffle (53) and the end portion of the piston (2), the hinge baffle (53) is completely pressed into the cylinder wall of the piston cylinder (3), the gas outlet passage (32) is closed by the hinge baffle (53), and the gas inlet passage (31) is communicated with the gas inlet space; When the piston (2) continues to rotate to the abutment between the hinge baffle (53) and the outer wall between the adjacent end portions of the piston (2), the hinge baffle (53) is popped out of the cylinder wall of the piston cylinder (3); the side wall of the piston (2), the piston cylinder (3) and the side of the hinge baffle (53) away from the piston (2) form a compression gas space with a gradually decreasing volume, which is communicated with the gas outlet passage (32); the side wall of the piston (2), the piston cylinder (3) and the side of the hinge baffle (53) close to the piston (2) form a gas inlet space with a corresponding increased volume, which is communicated with the gas inlet passage (31).

2. The rotary piston gas compression device of claim 1, wherein: The N end portions of the piston (2) are provided with elastic structures for abutting and sealing against the cylinder wall of the piston cylinder (3); The elastic structure comprises a flexible outer wall located at the end portion of the piston (2) and integrated with the piston (2); Alternatively, the elastic structure comprises a sealing piece mounting groove arranged at the end portion of the piston (2), a sealing block (4) arranged in the sealing piece mounting groove and an elastic piece located between the sealing piece mounting groove and the sealing block (4); Alternatively, the elastic structure comprises a sealing piece mounting groove arranged at the end portion of the piston (2) and an elastic piece arranged in the sealing piece mounting groove.

3. The rotary piston gas compression device of claim 1 or 2, characterized in that: The cross section of the piston (2) is a regular polygon with N sides, and N is greater than or equal to 3.

4. The rotary piston gas compression device of claim 3, wherein: The baffle assembly (5) further comprises a wear-resistant head (54) arranged at the abutting end of the hinge baffle (53).

5. The rotary piston gas compression device according to claim 4, characterized in that: The elastic reset structure comprises a reset plate (52) connected to the outer circumferential surface of the hinge column (51) and a reset spring (7); the reset spring (7) is located between the piston cylinder (3) and the reset plate (52) and is used to provide elastic force to the reset plate (52); Alternatively, the elastic reset structure comprises a reset spring (7) located between the piston cylinder (3) and the hinge baffle (53) and used to provide elastic force to the hinge baffle (53).

6. The rotary piston gas compression device of claim 5, wherein: A one-way valve (6) is further arranged on the gas outlet (32).

7. The rotary piston gas compression device according to claim 6, characterized in that: The piston cylinder (3) comprises a cylinder wall and an upper baffle (33) and a lower baffle (34) arranged at the top and bottom of the cylinder wall respectively; Alternatively, the cylinder wall and the upper baffle (33) or the lower baffle (34) are integrally arranged; Alternatively, the cylinder wall comprises two upper and lower split half cylinder walls, and each half cylinder wall is integrally arranged with the upper baffle (33) or the lower baffle (34) respectively.

8. The rotary piston gas compression device according to claim 7, characterized in that: The inlet of the gas inlet (31) is located on the lower baffle (34) or on the upper baffle (33), and the outlet of the gas outlet (32) is located on the upper baffle (33) or on the lower baffle (34).

9. The rotary piston gas compression device of claim 1, wherein: The inner side surface of the cylinder wall of the piston cylinder (3) is a cylindrical surface.

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