Horizontal two-stage rolling rotor compressor

Abstract

The utility model discloses a horizontal two-stage rolling rotor compressor which comprises an outer shell, an air inlet and an air outlet are formed in the outer shell, a pump body is arranged in the outer shell and divides the interior of the outer shell into a high-pressure cavity and a medium-pressure cavity, the high-pressure cavity is connected with the air outlet, and the medium-pressure cavity is connected with the air outlet. The pump body is provided with a first-stage air cylinder hole and a second-stage air cylinder hole, the first-stage air cylinder hole is in butt joint with the air inlet, the first-stage air cylinder hole is provided with a first-stage air cylinder outlet communicated with the medium-pressure cavity, and the second-stage air cylinder hole is provided with a second-stage air cylinder inlet communicated with the medium-pressure cavity. A second-stage air cylinder outlet communicated with the high-pressure cavity is formed in the second-stage air cylinder hole; the device has the advantages of being high in working efficiency, stable in working and simple in structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and particularly relates to a horizontal two-stage rolling rotor compressor. Background Art

[0002] Rotary compressors are divided into two categories, one is the fixed vane type, and the other is the sliding vane type. In the fixed vane rotary compressor, the rotor is installed on the eccentric shaft. When rotating, it generates a volume change and relies on the fixed vane to separate the cylinder. This type of compressor must be equipped with a one-way valve on the exhaust or suction pipeline to prevent the refrigerant from flowing back from the condenser to the evaporator when the machine stops. The sliding vane rotary compressor is very similar to a vane pump. Without a sealing ring, relying on centrifugal force, lubricating oil, and the eccentricity of the rotor to the cylinder, it achieves the tight fit between the vane and the cylinder. Whether it is good or not has a great relationship with the supply of lubricating oil.

[0003] The components of a rolling rotor compressor mainly include a rolling rotor, a cylinder, a sliding vane, a cylinder end cover, an eccentric shaft, a motor assembly, and a compressor assembly. The rolling rotor and the cylinder are the core components of the rolling rotor compressor. The rolling rotor is installed on the rotating shaft, and the cylinder provides the compression space. The sliding vane is installed in the cylinder and works with the rolling rotor to assist the compression process. The cylinder end cover is used to seal the cylinder to ensure the tightness of the compression process. The eccentric shaft is connected to the rolling rotor. Through the rotation of the eccentric shaft, the rolling rotor slides in the cylinder to achieve gas compression. The motor assembly includes a stator and a rotor, which provides power for the entire compressor. The compressor assembly includes a crankshaft, an upper bearing, a lower bearing, and an exhaust valve plate. These components work together to ensure the normal operation of the compressor.

[0004] The problem of the prior art is that when the existing rolling rotor compressor works, it directly sucks gas into the cylinder for compression and then discharges it into the compressor housing. Since the gas density at the intake end is small, the suction efficiency is low, and the space at the outlet end is large, resulting in a relatively low overall working efficiency of the compressor. Since the overall air pressure in the compressor housing is relatively high, the requirements for the thickness and strength of the entire housing are relatively high, resulting in an increase in cost and an increased risk of leakage, affecting the working stability. Summary of the Invention

[0005] The purpose of the utility model is to provide a horizontal two-stage rolling rotor compressor aiming at the problems existing in the prior art, which has the advantages of high working efficiency, stable operation, and simple structure.

[0006] To achieve the above object, the technical solution adopted by the present utility model is as follows: a horizontal two-stage rolling rotor compressor, including a housing body, an air inlet and an air outlet are provided on the housing body, a pump body is arranged inside the housing body, and the pump body divides the inside of the housing body into a high-pressure cavity and a medium-pressure cavity. The high-pressure cavity is connected to the air outlet. The pump body is provided with a first-stage cylinder hole and a second-stage cylinder hole. The first-stage cylinder hole is docked with the air inlet, a first-stage cylinder outlet communicating with the medium-pressure cavity is provided at the first-stage cylinder hole, a second-stage cylinder inlet communicating with the medium-pressure cavity is provided at the second-stage cylinder hole, and a second-stage cylinder outlet communicating with the high-pressure cavity is provided at the second-stage cylinder hole.

[0007] In the above solution, the air inlet and the air outlet are provided on the housing body to realize air intake and exhaust. The pump body is installed inside the housing body and divides the inside of the housing body into a high-pressure cavity and a medium-pressure cavity. The low-pressure gas at the air inlet is directly introduced into the first-stage cylinder hole for compression. The compressed gas is discharged into the medium-pressure cavity from the first-stage cylinder outlet. The gas in the medium-pressure cavity enters the second-stage cylinder hole through the second-stage cylinder inlet for compression. The compressed gas is discharged from the second-stage cylinder outlet into the high-pressure cavity and finally discharged from the air outlet of the compressor. The suction efficiency during the second-stage compression is improved through the structure of the second-stage compression, and at the same time, the pressure borne by the housing body at the medium-pressure cavity is reduced, which can reduce the thickness of the housing and the leakage risk.

[0008] Further, a connecting groove is arranged inside the housing body. A circular connecting portion is arranged in the middle of the connecting groove. The pump body is provided with a first mounting portion for snap-fitting connection with the connecting groove. A first sealing ring is arranged between the first mounting portion and the connecting groove. The pump body is provided with a second mounting portion for snap-fitting connection with the circular connecting portion. A second sealing ring is arranged between the second mounting portion and the circular connecting portion. The high-pressure cavity is formed among the connecting groove, the circular connecting portion, and the pump body.

[0009] The connecting groove is snap-fitted with the first mounting portion, and the sealing connection is realized by cooperating with the first sealing ring. The second mounting portion is snap-fitted with the circular connecting portion, and the sealing connection is realized by cooperating with the second sealing ring, thereby forming a sealed circular high-pressure cavity structure.

[0010] Further, annular clamping grooves are respectively arranged on the outer circles of the first mounting portion and the second mounting portion. The first sealing ring and the second sealing ring are respectively arranged in the annular clamping grooves.

[0011] The annular clamping grooves are arranged to position the first sealing ring and the second sealing ring to ensure the sealing performance of the connection.

[0012] Further, the pump body includes a crankshaft and a first cylinder head, a first cylinder part, a middle partition plate, a second cylinder part, and a second cylinder head that are sequentially connected by a first fastener. The crankshaft is rotatably connected to the middle parts of the first cylinder head, the first cylinder part, the middle partition plate, the second cylinder part, and the second cylinder head. Rolling pistons are arranged in the first cylinder part and the second cylinder part, and the rolling pistons are rotatably connected to the crankshaft.

[0013] The assembly of the first cylinder head, the first cylinder part, the middle partition plate, the second cylinder part, and the second cylinder head by the first fastener is simple and the structure is stable. The rolling pistons are driven to rotate by the eccentric part of the crankshaft to compress the gas. A first-stage cylinder hole is opened in the middle of the first cylinder part, and a second-stage cylinder hole is opened in the middle of the second cylinder part.

[0014] Further, the second cylinder head includes a first installation part and a second installation part, and the first cylinder head is connected to the outer shell by a second fastener.

[0015] The first installation part and the second installation part are integrally provided with the second cylinder head, with a simple structure and convenient installation. The first cylinder head is connected to the outer shell by the second fastener to fasten the pump body part.

[0016] Further, a docking pipeline is arranged between the air inlet and the first-stage cylinder hole.

[0017] The docking pipeline is provided to achieve a sealed connection between the air inlet and the first-stage cylinder hole, avoiding the leakage of the medium-pressure gas in the medium-pressure cavity.

[0018] Further, the outer shell includes a shell part and a cover part, and the shell part and the cover part are connected by a third fastener.

[0019] The connection and disassembly between the shell part and the cover part are facilitated by the third fastener, and the manufacturing is simple.

[0020] Further, a motor is arranged inside the outer shell, and the crankshaft is connected to the motor rotor.

[0021] The rotation of the motor rotor drives the crankshaft and the rolling pistons to move, realizing the function of compressing the gas.

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0023] 1. By providing a first-stage cylinder hole and a second-stage cylinder hole on the pump body to cooperate with the crankshaft and the rolling pistons to perform two-stage compression on the gas, the medium-pressure gas after the first compression is discharged into the inner part of the outer shell and then enters the second-stage cylinder hole for the second compression, compressing the medium-pressure gas into high-pressure gas. The high-pressure gas is discharged from the compressor through the high-pressure cavity and the exhaust port. Through the two-stage compression method, the intake efficiency during the second compression is improved, thereby improving the overall working efficiency of the compressor;

[0024] 2. By partitioning and arranging a medium-pressure cavity and a high-pressure cavity inside the outer shell, the high-pressure end is concentrated, which is beneficial to reducing the thickness and strength of the outer shell corresponding to the medium-pressure cavity, facilitating cost savings; reducing the corresponding gas leakage risk and having good working stability;

[0025] 3. By adopting a two-stage compression method, it is beneficial to reducing the compression ratio during each compression, making the compressor work stably. By separately arranging a high-pressure cavity for exhaust, it avoids the oil being carried out from the high-pressure cavity, and the compressor works stably;

[0026] 4. Through a single pump body structure, two consecutive compressions of the gas can be achieved, with good compression effect and simple structure. Description of the Drawings

[0027] Figure 1 It is the main structural view of a horizontal two-stage rolling rotor compressor according to Embodiment 1 of the present utility model;

[0028] Figure 2 is Figure 1 the sectional view at A-A in

[0029] Figure 3 is Figure 1 the sectional view at B-B in

[0030] Figure 4 It is the structural schematic diagram of the annular card slot in Embodiment 1 of the present utility model;

[0031] Figure 5 It is the three-dimensional structural view of a horizontal two-stage rolling rotor compressor according to Embodiment 1 of the present utility model;

[0032] In the figure: 1. Housing part; 2. Cover part; 3. Exhaust port; 4. Intake port; 5. High-pressure cavity; 6. Medium-pressure cavity; 7. First-stage cylinder hole; 8. Second-stage cylinder hole; 9. First-stage cylinder outlet; 10. Second-stage cylinder inlet; 11. Second-stage cylinder outlet; 12. Connection groove; 13. Annular connection part; 14. First installation part; 15. Second installation part; 16. First sealing ring; 17. Second sealing ring; 18. Annular card slot; 19. First fastener; 20. Second fastener; 21. Third fastener; 22. First cylinder head; 23. First cylinder part; 24. Middle partition board; 25. Second cylinder part; 26. Second cylinder head; 27. Crankshaft; 28. Rolling piston; 29. Docking pipeline; 30. Motor; 31. Oil hole. Detailed Implementation Modes

[0033] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model. In the description of the present utility model, it should be noted that the terms such as front, back, left, and right indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship when the product of the present utility model is normally placed. It is only for the convenience of describing the present utility model or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. Embodiment 1

[0034] As Figures 1-5 shown, a horizontal two-stage rolling rotor compressor includes a housing body. An air inlet 4 and an air outlet 3 are provided on the housing body. A pump body is arranged inside the housing body. The pump body divides the inside of the housing body into a high-pressure cavity 5 and a medium-pressure cavity 6. The high-pressure cavity 5 is connected to the air outlet 3. The pump body is provided with a first-stage cylinder hole 7 and a second-stage cylinder hole 8. The first-stage cylinder hole 7 is docked with the air inlet 4. A first-stage cylinder outlet 9 communicating with the medium-pressure cavity 6 is provided at the first-stage cylinder hole 7. A second-stage cylinder inlet 10 communicating with the medium-pressure cavity 6 is provided at the second-stage cylinder hole 8. A second-stage cylinder outlet 11 communicating with the high-pressure cavity 5 is provided at the second-stage cylinder hole 8.

[0035] In the above solution, the air inlet 4 and the air outlet 3 are provided on the housing body to achieve air intake and exhaust. The pump body is installed inside the housing body and divides the inside of the housing body into a high-pressure cavity 5 and a medium-pressure cavity 6. The low-pressure gas at the air inlet 4 is directly introduced into the first-stage cylinder hole 7 for compression. The compressed gas is discharged into the medium-pressure cavity 6 from the first-stage cylinder outlet 9. The gas in the medium-pressure cavity 6 enters the second-stage cylinder hole 8 through the second-stage cylinder inlet 10 for compression. The compressed gas is discharged into the high-pressure cavity 5 from the second-stage cylinder outlet 11 and finally discharged from the air outlet 3 of the compressor. The structure of two-stage compression is adopted to improve the suction efficiency during two-stage compression, and at the same time, the pressure borne by the housing body at the medium-pressure cavity 6 is reduced, which can reduce the thickness of the housing and the leakage risk.

[0036] Further, a connection groove 12 is provided inside the housing body. An annular connection part 13 is provided in the middle of the connection groove 12. An installation part one 14 for engaging and connecting with the connection groove 12 is provided on the pump body. A sealing ring one 16 is provided between the installation part one 14 and the connection groove 12. An installation part two 15 for engaging and connecting with the annular connection part 13 is provided on the pump body. A sealing ring two 17 is provided between the installation part two 15 and the annular connection part 13. The high-pressure cavity 5 is formed among the connection groove 12, the annular connection part 13, and the pump body.

[0037] It is engaged and connected with the installation part one 14 through the connection groove 12, and the sealing connection is realized by cooperating with the sealing ring one 16. It is engaged and connected with the annular connection part 13 through the installation part two 15, and the sealing connection is realized by cooperating with the sealing ring two 17, so as to form a sealed annular high-pressure cavity 5 structure.

[0038] A groove body is opened in the middle of the annular connection part 13 for connecting with the installation part two 15. A connection hole is opened in the middle of the installation part two 15 for connecting with the crankshaft 27. An oil hole 31 for the oil to flow at the end of the crankshaft 27 is opened between the groove body and the medium-pressure cavity. The cross-sections of the connection groove 12 and the annular connection part 13 are both circular, and the connection groove 12 and the annular connection part 13 are concentrically arranged.

[0039] Further, annular clamping grooves 18 are respectively provided on the outer circles of the installation part one 14 and the installation part two 15. The sealing ring one 16 and the sealing ring two 17 are respectively arranged in the annular clamping grooves 18.

[0040] The sealing ring one 16 and the sealing ring two 17 are positioned by setting the annular clamping grooves 18 to ensure the sealing of the connection.

[0041] The sealing ring two 17 can be arranged on the inner side, end face or outer side of the annular connection part 13 according to requirements.

[0042] Further, the pump body includes a crankshaft 27 and a cylinder head one 22, a cylinder part one 23, a middle partition 24, a cylinder part two 25, and a cylinder head two 26 that are sequentially connected by a fastener one 19. The crankshaft 27 is rotatably connected to the middle parts of the cylinder head one 22, the cylinder part one 23, the middle partition 24, the cylinder part two 25, and the cylinder head two 26. Rolling pistons 28 are arranged in the cylinder part one 23 and the cylinder part two 25, and the rolling pistons 28 are all rotatably connected to the crankshaft 27.

[0043] The cylinder head one 22, the cylinder part one 23, the middle partition 24, the cylinder part two 25, and the cylinder head two 26 are sequentially connected by the fastener one 19, which is simple in assembly and stable in structure. The rolling pistons 28 are driven to rotate by the eccentric part of the crankshaft 27 to realize the compression of gas. A primary cylinder hole 7 is opened in the middle of the cylinder part one 23, and a secondary cylinder hole 8 is opened in the middle of the cylinder part two 25.

[0044] A spring and a sliding piece are arranged on the first cylinder part 23 and the second cylinder part 25 to cooperate with the rolling piston 28. One-way opening exhaust valve pieces are arranged on the first cylinder head 22 and the second cylinder head 26 to prevent gas from flowing back. The positions of the exhaust valve pieces correspond to the outlet of the first-stage cylinder 9 and the outlet of the second-stage cylinder 11. The first fastener 19, the second fastener 20, and the third fastener 21 include bolts, and three first fasteners 19 are arranged along the circumferential direction.

[0045] Further, the second cylinder head 26 includes a first installation part 14 and a second installation part 15, and the first cylinder head 22 is connected to the outer shell through the second fastener 20.

[0046] The first installation part 14 and the second installation part 15 are integrally arranged with the second cylinder head 26, with a simple structure and convenient installation. The first cylinder head 22 is connected to the outer shell through the second fastener 20 to realize the fastening of the pump body part.

[0047] Threaded holes are arranged inside the outer shell to cooperate with the second fastener 20.

[0048] Further, a docking pipeline 29 is arranged between the air inlet 4 and the first-stage cylinder hole 7.

[0049] By arranging the docking pipeline 29, the sealing connection between the air inlet 4 and the first-stage cylinder hole 7 is realized, and the medium-pressure gas in the medium-pressure cavity 6 is prevented from leaking.

[0050] The docking pipeline 29 and the first cylinder part 23 can be fixedly connected or connected by clamping with a sealing ring. The docking pipeline 29 and the air inlet 4 can be fixedly connected or detachably connected.

[0051] Further, the outer shell includes a shell part 1 and a cover part 2, and the shell part 1 and the cover part 2 are connected through the third fastener 21.

[0052] The connection and disassembly between the shell part 1 and the cover part 2 are facilitated through the third fastener 21, and the manufacturing is simple.

[0053] A sealing ring can be arranged between the shell part 1 and the cover part 2 for sealing.

[0054] Further, a motor 30 is arranged inside the outer shell, and the crankshaft 27 is connected to the rotor of the motor 30.

[0055] The rotation of the rotor of the motor 30 drives the crankshaft 27 and the rolling piston 28 to move, realizing the gas compression function.

[0056] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A horizontal two-stage rolling rotor compressor, comprising an outer shell, an air inlet and an air outlet are provided on the outer shell, a pump body is arranged in the outer shell, and the compressor is characterized in that: The pump body divides the interior of the outer shell into a high-pressure cavity and a medium-pressure cavity. The high-pressure cavity is connected to the exhaust port. A primary cylinder hole and a secondary cylinder hole are opened on the pump body. The primary cylinder hole is connected to the air inlet. A primary cylinder outlet connected to the medium-pressure cavity is opened at the primary cylinder hole. A secondary cylinder inlet connected to the medium-pressure cavity is opened at the secondary cylinder hole. A secondary cylinder outlet connected to the high-pressure cavity is opened at the secondary cylinder hole.

2. The horizontal two-stage rolling rotor compressor according to claim 1, characterized in that: A connecting groove is provided in the outer shell, an annular connecting part is provided in the middle of the connecting groove, a mounting part 1 for engaging with the connecting groove is provided on the pump body, a sealing ring 1 is provided between the mounting part 1 and the connecting groove, a mounting part 2 for engaging with the annular connecting part is provided on the pump body, a sealing ring 2 is provided between the mounting part 2 and the annular connecting part, and the high-pressure cavity is formed between the connecting groove, the annular connecting part and the pump body.

3. The horizontal two-stage rolling rotor compressor according to claim 2, characterized in that: The outer rings of the mounting part 1 and the mounting part 2 are respectively provided with an annular groove, and the sealing ring 1 and the sealing ring 2 are respectively arranged in the annular groove.

4. The horizontal two-stage rolling rotor compressor according to claim 2, characterized in that: The pump body includes a crankshaft and a cylinder head 1, a cylinder part 1, a middle partition, a cylinder part 2, and a cylinder head 2 which are connected in sequence by a fastener 1. The crankshaft is rotatably connected to the middle parts of the cylinder head 1, the cylinder part 1, the middle partition, the cylinder part 2, and the cylinder head 2. Rolling pistons are arranged in the cylinder part 1 and the cylinder part 2, and the rolling pistons are both rotatably connected to the crankshaft.

5. The horizontal two-stage rolling rotor compressor according to claim 4, characterized in that: The cylinder cover 2 comprises a mounting portion 1 and a mounting portion 2, and the cylinder cover 1 is connected to the outer shell through a fastener 2.

6. The horizontal two-stage rolling rotor compressor according to claim 1, characterized in that: A butt joint pipe is arranged between the air inlet and the first-stage cylinder hole.

7. The horizontal two-stage rolling rotor compressor according to claim 1, characterized in that: The outer shell comprises a shell part and a cover part, and the shell part and the cover part are connected by fasteners.

8. The horizontal two-stage rolling rotor compressor according to claim 4, characterized in that: A motor is arranged in the outer shell, and the crankshaft is connected to the motor rotor.

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