Scroll compressor body

Abstract

The scroll compressor body comprises a cylindrical shell, a motor stator mounting hole is formed in one end of the shell, a bearing mounting hole is formed in the other end of the shell, the motor stator mounting hole and the bearing mounting hole are coaxially formed, and a back pressure cavity is formed in the side, away from the motor stator mounting hole, of the bearing mounting hole; a backpressure control valve mounting hole communicated with the backpressure cavity is formed in the shell, a backpressure control valve air inlet is formed in the shell, one end of the backpressure control valve air inlet extends to the end face of the shell, and the other end of the backpressure control valve air inlet is communicated with the backpressure control valve mounting hole. The motor stator is installed on a motor stator installation hole, the eccentric shaft rotates through a bearing, the eccentric shaft is installed on the bearing, and the bearing is installed in a bearing installation hole in the shell, so that the concentricity of the motor stator and the eccentric shaft is guaranteed, and a part of compressed gas enters a back pressure cavity to apply pressure to a dynamic vortex plate. The end faces of the orbiting scroll and the static scroll are tightly attached, and gas leakage is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and in particular relates to a scroll compressor body. Background Art

[0002] As a new type of high-efficiency positive displacement compressor, the scroll compressor is widely recognized as a technologically advanced third-generation compressor, following reciprocating, rotary, and screw compressors. Its unique structure and motion give it excellent thermal and mechanical properties, making it widely used in a variety of fields. The core components of a scroll compressor are the orbiting scroll and the stationary scroll. These two scrolls typically consist of two meshing scrolls with a double-function equation profile. During the intake, compression, and exhaust processes, the stationary scroll is fixed to the frame. Driven by an eccentric shaft and restrained by an anti-rotation mechanism, the orbiting scroll rotates in a planar manner around the center of the stationary scroll's base circle within a very small radius. Gas is drawn into the periphery of the stationary scroll through an air filter. As the eccentric shaft rotates, the gas is gradually compressed within the crescent-shaped compression chambers formed by the meshing of the orbiting and stationary scrolls before being discharged continuously through the axial hole in the center of the stationary scroll. The motor stator and eccentric shaft of the existing compressor are installed on two workpieces, which easily leads to installation errors. During operation, the end faces of the movable scroll and the static scroll are not firmly fitted, resulting in gas leakage. Utility Model Content

[0003] Therefore, the present invention aims to solve the problem in the prior art that the motor stator and eccentric shaft of the compressor are installed on two workpieces, which easily leads to installation errors. During operation, the end faces of the movable scroll and the static scroll are not firmly fitted, resulting in gas leakage.

[0004] To this end, the technical solution adopted is that the utility model provides a scroll compressor body, comprising: an outer shell, the outer shell is cylindrical, a motor stator mounting hole is provided at one end of the outer shell, a bearing mounting hole is provided at the other end of the outer shell, the motor stator mounting hole and the bearing mounting hole are coaxially arranged, a back pressure cavity is provided on the side of the bearing mounting hole away from the motor stator mounting hole, a back pressure control valve mounting hole connected to the back pressure cavity is provided on the outer shell, a back pressure control valve air inlet hole is provided on the outer shell, one end of the back pressure control valve air inlet hole extends to the end face of the outer shell, and the other end of the back pressure control valve air inlet hole is connected to the back pressure control valve mounting hole.

[0005] Preferably, a plurality of bolt holes are provided on the left end surface of the housing along the circumferential direction.

[0006] Preferably, an air intake is provided on the left end surface of the shell.

[0007] Preferably, a plurality of screw holes and pin holes are circumferentially arranged on the right end surface of the shell.

[0008] Preferably, a bearing oil return hole and a bearing oil return cavity are provided on the end surface of the housing where the back pressure cavity is provided, and a bearing oil inlet hole is provided on the circumferential outer wall of the housing.

[0009] Preferably, the motor stator mounting hole and the bearing mounting hole are connected in sequence through the eccentric shaft bridge hole and the oil seal mounting hole.

[0010] The technical solution of the utility model has the following advantages: the motor stator is mounted on the motor stator mounting hole, the eccentric shaft rotates through the bearing, the eccentric shaft is mounted on the bearing, and the bearing is mounted in the bearing mounting hole on the outer shell, thereby ensuring the concentricity of the motor stator and the eccentric shaft. During the operation of the compressor, a part of the compressed gas will enter through the air inlet hole of the back pressure control valve, and then enter the back pressure chamber, applying pressure to the movable scroll, so that the end faces of the movable scroll and the static scroll fit tightly to prevent gas leakage.

[0011] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0012] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 It is a left view of the utility model;

[0016] Figure 3 It is a right side view of the utility model;

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the internal structure of the compressor in the present utility model;

[0019] Figure 6 It is a schematic diagram of the external structure of the utility model;

[0020] Figure 7 This is a schematic diagram of the meshing of the orbiting scroll and the stationary scroll in the present invention;

[0021] Among them, 1. Housing; 2. Motor stator mounting hole; 3. Bearing mounting hole; 4. Back pressure chamber; 5. Back pressure control valve mounting hole; 6. Back pressure control valve air inlet hole; 7. Bolt hole; 8. Air intake port; 9. Screw hole; 10. Pin hole; 11. Bearing oil return hole; 12. Bearing oil return chamber; 13. Bearing oil inlet hole; 14. Eccentric shaft bridge hole; 15. Oil seal mounting hole; 16. Electronic control board back cover; 17. Exhaust end cover; 18. Motor stator; 19. Motor rotor; 20. Eccentric shaft; 21. Bearing; 22. Orbital scroll; 23. Static scroll; 24. Exhaust port; 25. Air intake interface; 26. Exhaust interface. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] It should be noted that when a component is referred to as being “fixed to” or “disposed on” another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being “connected to” another component, it can be directly or indirectly connected to the other component.

[0024] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0026] The utility model provides a scroll compressor body, such as Figure 1-7As shown, the housing 1 comprises a cylindrical housing 1 with a motor stator mounting hole 2 at one end and a bearing mounting hole 3 at the other end. The motor stator mounting hole 2 and the bearing mounting hole 3 are coaxially arranged. A backpressure chamber 4 is provided on the side of the bearing mounting hole 3 away from the motor stator mounting hole 2. The housing 1 is provided with a backpressure control valve mounting hole 5 connected to the backpressure chamber 4. The housing 1 is provided with a backpressure control valve air inlet 6. One end of the backpressure control valve air inlet 6 extends to the end surface of the housing 1, and the other end of the backpressure control valve air inlet 6 is connected to the backpressure control valve mounting hole 5. A backpressure control valve is installed in the backpressure control valve air inlet 6 to control the flow rate of the airflow.

[0027] The working principle and beneficial technical effects of the above technical solution are as follows: the motor stator is installed on the motor stator mounting hole 2, the eccentric shaft rotates through the bearing, the eccentric shaft is installed on the bearing, and the bearing is installed in the bearing mounting hole 3 on the outer casing 1, thereby ensuring the concentricity of the motor stator and the eccentric shaft. During the operation of the compressor, a part of the compressed gas will enter through the back pressure control valve inlet hole 6, and then enter the back pressure chamber 4, applying pressure to the movable scroll, so that the end faces of the movable scroll and the static scroll fit tightly to prevent gas leakage.

[0028] In one embodiment, Figure 1-7 As shown, a plurality of bolt holes 7 are provided along the circumference on the left end face of the housing 1, and the housing 1 is connected to the rear cover 16 of the electric control board by bolts. An air intake port 8 is provided on the left end face of the housing 1 for inhaling the gas to be compressed. A plurality of screw holes 9 and pin holes 10 are provided along the circumference on the right end face of the housing 1, so that the pins on the exhaust end cover 17 can be inserted into the pin holes 10 for positioning, and the exhaust end cover 17 can be installed on the right end of the housing 1 by screws. A bearing oil return chamber 11 and a bearing oil return hole 12 are provided on the end face of the housing 1 where the back pressure chamber 4 is provided, and a bearing oil inlet hole 13 is provided on the circumferential outer wall of the housing 1. The lubricating oil enters the bearing 21 from the bearing oil inlet hole 13 and flows out from the bearing oil return hole 12, which can lubricate the bearing and reduce friction. The motor stator mounting hole 2 and the bearing mounting hole 3 are connected in sequence through the eccentric shaft bridge hole 14 and the oil seal mounting hole 15. The eccentric shaft bridge hole 14 is used for the eccentric shaft 20 to pass through, and the oil seal mounting hole 15 is used to install the oil seal to improve the sealing performance.

[0029] The left end of the housing 1 is connected to the rear cover 16 of the electric control board by bolts, and the right end of the housing 1 is connected to the exhaust end cover 17 by screws. The motor stator 18 is installed in the motor stator mounting hole 2, and the motor rotor 19 is coaxially arranged in the motor stator 18. The motor rotor 19 is connected to one end of the eccentric shaft 20, and the eccentric shaft 20 is installed in the bearing mounting hole 3 through a bearing 21. The other end of the eccentric shaft 20 is connected to the movable scroll 22, and the fixed scroll 23 is installed in the exhaust end cover 17. An air inlet interface 25 is provided on the rear cover 16 of the electric control board for connecting the compressor to the air inlet pipe, and an exhaust interface 26 is provided on the exhaust end cover 17 for connecting to the exhaust pipe to discharge the compressed gas.

[0030] The working principle and beneficial technical effects of the above technical solution are as follows: after the compressor is started, the motor rotor 19 drives the movable scroll 22 to rotate, and the movable scroll 22 and the static scroll 23 engage with each other, so that the gas enters the periphery of the static scroll 23 through the air inlet 6, and is gradually compressed and discharged through the exhaust port 24. The exhaust port 24 is connected to the air inlet 6 of the back pressure control valve. The incoming air flow flows into the back pressure chamber and applies pressure to the movable scroll 22, so that the movable scroll 22 fits tightly on the static scroll 23, and the end faces of the vortex disk fit tightly to prevent gas leakage.

[0031] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A scroll compressor body, characterized in that: include: The housing (1) is cylindrical, one end of the housing (1) is provided with a motor stator mounting hole (2), the other end of the housing (1) is provided with a bearing mounting hole (3), the motor stator mounting hole (2) and the bearing mounting hole (3) are coaxially arranged, a back pressure cavity (4) is provided on the side of the bearing mounting hole (3) away from the motor stator mounting hole (2), the housing (1) is provided with a back pressure control valve mounting hole (5) communicating with the back pressure cavity (4), the housing (1) is provided with a back pressure control valve air inlet hole (6), one end of the back pressure control valve air inlet hole (6) extends to the end face of the housing (1), and the other end of the back pressure control valve air inlet hole (6) is communicated with the back pressure control valve mounting hole (5).

2. A scroll compressor body according to claim 1, characterized in that: A plurality of bolt holes (7) are arranged on the left end surface of the housing (1) along the circumferential direction.

3. The scroll compressor body according to claim 1, characterized in that: An air intake (8) is provided on the left end surface of the housing (1).

4. The scroll compressor body according to claim 1, characterized in that: A plurality of screw holes (9) and pin holes (10) are arranged on the right end surface of the housing (1) along the circumferential direction.

5. The scroll compressor body according to claim 1, characterized in that: A bearing oil return hole (11) and a bearing oil return cavity (12) are provided on the end surface of the housing (1) on which the back pressure cavity (4) is provided, and a bearing oil inlet hole (13) is provided on the circumferential outer wall of the housing (1).

6. The scroll compressor body according to claim 1, characterized in that: The motor stator mounting hole (2) and the bearing mounting hole (3) are connected in sequence through the eccentric shaft bridge hole (14) and the oil seal mounting hole (15).

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