Air conditioner compressor screw structure with lubricating structure

Abstract

The utility model discloses an air conditioner compressor screw structure with a lubricating structure, which comprises a shell, a cavity is arranged in the shell, a male rotor and a female rotor which are meshed with each other are connected in the cavity, a first rotating shaft is connected onto the male rotor, a second rotating shaft is connected onto the female rotor, and the first rotating shaft and the second rotating shaft are meshed with each other. A first connecting hole and a second connecting hole are formed in the left side and the right side of the shell correspondingly. The first rotating shaft is rotationally connected with the first connecting hole; the second rotating shaft is rotationally connected with the second connecting hole; a first lubricating groove is formed in the first connecting hole; the shell is provided with an oil inlet channel communicated with the first lubricating groove. A second lubricating groove is formed in the second connecting hole; the shell is further provided with an oil outlet channel communicated with the second lubricating groove. The oil inlet channel and the oil outlet channel are arranged on the two sides of the shell, so that lubricating oil can conveniently lubricate the screw structure of the air conditioner compressor after entering from the oil inlet channel, and oil accumulation in the shell can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning compressors, in particular to a screw structure of an air-conditioning compressor with a lubricating structure. Background Art

[0002] A screw air compressor is a type of positive displacement compressor. The compression of air is achieved by the volume change of the tooth grooves of the male and female rotors that mesh with each other in the machine housing. The male and female rotors rotate in the machine housing that fits precisely with them, causing the gas between the rotor tooth grooves to continuously undergo periodic volume changes, and being pushed from the suction side to the discharge side along the rotor axis to complete the three working processes of suction, compression, and exhaust.

[0003] There will be a gap between the shaft rods at both ends of the male and female rotors and the surface of the equipment main body. Dust is likely to accumulate in this gap. After the male and female rotors are installed, lubricating oil needs to be frequently injected at the connection position of the shaft rods to prevent tight jamming. However, during actual use, after the shaft rods are connected to the equipment main body, when lubricating oil is drop-in lubricated, it is very difficult for the lubricating oil to enter the connection position between the shaft rods and the equipment main body, and the lubrication work after installation cannot be achieved. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problems in the prior art, and a screw structure of an air-conditioning compressor with a lubricating structure is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A screw structure of an air-conditioning compressor with a lubricating structure includes a housing. A cavity is provided inside the housing. A male rotor and a female rotor that mesh with each other are connected inside the cavity. A first rotating shaft is connected to the male rotor, and a second rotating shaft is connected to the female rotor. A first connection hole and a second connection hole are respectively provided on the left and right sides of the housing; the first rotating shaft is rotatably connected to the first connection hole; the second rotating shaft is rotatably connected to the second connection hole; a first lubricating groove is provided at the first connection hole; an oil inlet channel that communicates with the first lubricating groove is provided on the housing; a second lubricating groove is provided at the second connection hole; an oil outlet channel that communicates with the second lubricating groove is further provided on the housing; a number of balls are connected in both the first lubricating groove and the second lubricating groove; windows are provided on the inner sides of both the first lubricating groove and the second lubricating groove; and the diameter size of the window is smaller than the diameter size of the ball. Preferably, one end of both the oil inlet channel and the oil outlet channel extends to the outside of the housing; the other end of the oil inlet channel communicates with the inner side of the first lubricating groove; the other end of the oil outlet channel communicates with the inner side of the second lubricating groove.

[0007] Preferably, both the first lubricating groove and the second lubricating groove are inclined circular rings.

[0008] Preferably, a number of ball bearings are connected in both the first lubricating groove and the second lubricating groove; the diameter of the ball bearings is larger than the diameter of the window; one side of the ball bearings extends into the connecting hole through the window.

[0009] Preferably, an extrusion groove is connected to one end of the oil inlet passage close to the first lubricating groove; the extrusion groove is frustum-shaped; the diameter of one end of the extrusion groove is the same as the diameter of the oil inlet passage; the diameter of the other end of the extrusion groove is smaller than the diameter of the oil inlet passage.

[0010] Preferably, the end with a smaller diameter of the extrusion groove faces the first lubricating groove; and the diameter of the end of the extrusion groove close to the first lubricating groove is smaller than the diameter of the first lubricating groove.

[0011] Preferably, the cross-section of the oil outlet passage is oval; and the longitudinal diameter of the oil outlet passage is smaller than the diameter of the second lubricating groove; the transverse diameter of the oil outlet passage is larger than the diameter of the second lubricating groove.

[0012] Compared with the prior art, the present utility model provides a screw structure of an air-conditioning compressor with a lubricating structure, having the following beneficial effects:

[0013] For the screw structure of the air-conditioning compressor with a lubricating structure, by arranging an oil inlet passage and an oil outlet passage on both sides of the housing, lubricating the shaft connection of the male and female rotors, controlling the shape and size of the oil inlet passage and the oil outlet passage, and at the same time cooperating with the negative pressure generated after the rotation of the male and female rotors, so that after the lubricating oil enters from the oil inlet passage, lubricates the male and female rotors and their shafts, and then discharges from the oil outlet passage, which is convenient for lubricating the screw structure of the air-conditioning compressor and can prevent oil accumulation in the housing.

[0014] Parts not involved in this device are the same as or can be implemented by using the prior art. The structure of the present utility model is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the connecting hole in the present utility model;

[0017] Figure 3 is a schematic structural diagram of the first lubricating groove in the present utility model;

[0018] Figure 4 is a schematic structural diagram of the second lubricating groove in the present utility model.

[0019] In the figure: 10 housing, 11 cavity, 12 male rotor, 13 female rotor, 14 first rotating shaft, 15 second rotating shaft, 21 first lubricating groove, 22 second lubricating groove, 23 ball, 24 oil inlet passage, 25 extrusion groove, 26 oil outlet passage, 27 first connection hole, 28 window, 29 second connection hole. Specific embodiments

[0020] The following will refer to Figures 1-4 to introduce the specific embodiments of the screw structure of the air conditioner compressor with a lubrication structure in the present utility model, including a housing 10, a cavity 11 is provided in the housing 10, a male rotor 12 and a female rotor 13 that mesh with each other are connected in the cavity 11, a first rotating shaft 14 is connected to the male rotor 12, a second rotating shaft 15 is connected to the female rotor 13, a first connection hole 27 and a second connection hole 29 are respectively provided on the left and right sides of the housing 10; the first rotating shaft 14 is rotatably connected to the first connection hole 27; the second rotating shaft 15 is rotatably connected to the second connection hole 29;

[0021] A first lubricating groove 21 is provided at the first connection hole 27; an oil inlet passage 24 communicating with the first lubricating groove 21 is provided on the housing 10; a second lubricating groove 22 is provided at the second connection hole 29; an oil outlet passage 26 communicating with the second lubricating groove 22 is further provided on the housing 10; a number of balls 23 are connected in both the first lubricating groove 21 and the second lubricating groove 22; windows 28 are provided on the inner sides of the first lubricating groove 21 and the second lubricating groove 22; and the diameter size of the window 28 is smaller than the diameter size of the ball 23, ensuring that while the ball 23 is rotatably connected to the first rotating shaft 14 and the second rotating shaft 15, the ball 23 is clamped to the inner sides of the first lubricating groove 21 and the second lubricating groove 22.

[0022] One ends of the oil inlet passage 24 and the oil outlet passage 26 both extend to the outside of the housing 10; the other end of the oil inlet passage 24 communicates with the inner side of the first lubricating groove 21; the other end of the oil outlet passage 26 communicates with the inner side of the second lubricating groove 22; during use, after injecting lubricant through the oil inlet passage 24 to lubricate the first rotating shaft 14, the lubricating oil enters the cavity, and when the male rotor 12 and the female rotor 13 rotate.

[0023] To increase the lubrication effect, both the first lubricating groove 21 and the second lubricating groove 22 are inclined circular rings.

[0024] To prevent oil return at the oil inlet passage 24, an extrusion groove 25 is connected to one end of the oil inlet passage 24 close to the first lubricating groove 21; the extrusion groove 25 is frustum-shaped; the diameter dimension of one end of the extrusion groove 25 is the same as the diameter dimension of the oil inlet passage 24; the diameter dimension of the other end of the extrusion groove 25 is smaller than the diameter dimension of the oil inlet passage 24; the end with the smaller diameter dimension of the extrusion groove 25 faces the first lubricating groove 21; and the diameter dimension of the end of the extrusion groove 25 close to the first lubricating groove 21 is smaller than the diameter dimension of the first lubricating groove 21, preventing the ball 23 from moving outside the first lubricating groove 21.

[0025] The cross-section of the oil outlet passage 26 is elliptical; and the longitudinal diameter dimension of the oil outlet passage 26 is smaller than the diameter dimension of the second lubricating groove 22; the transverse diameter dimension of the oil outlet passage 26 is larger than the diameter dimension of the second lubricating groove 22, increasing the channel size of the oil outlet passage 26 while preventing the ball 23 from moving outside the first lubricating groove 21.

[0026] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. An air-conditioning compressor screw structure with a lubrication structure, comprising a housing (10), wherein a cavity (11) is provided in the housing (10), wherein a male rotor (12) and a female rotor (13) meshing with each other are connected in the cavity (11), wherein a first rotating shaft (14) is connected to the male rotor (12), and a second rotating shaft (15) is connected to the female rotor (13), wherein: The housing (10) is provided with a first connection hole (27) and a second connection hole (29) on the left and right sides respectively; the first rotating shaft (14) is rotatably connected to the first connection hole (27); and the second rotating shaft (15) is rotatably connected to the second connection hole (29); A first lubrication groove (21) is provided at the first connection hole (27); an oil inlet passage (24) communicating with the first lubrication groove (21) is provided on the housing (10); a second lubrication groove (22) is provided at the second connection hole (29); an oil outlet passage (26) communicating with the second lubrication groove (22) is also provided on the housing (10); a plurality of balls (23) are connected to the first lubrication groove (21) and the second lubrication groove (22); windows (28) are provided on the inner sides of the first lubrication groove (21) and the second lubrication groove (22); and the diameter of the window (28) is smaller than the diameter of the ball (23).

2. The air-conditioning compressor screw structure with a lubrication structure according to claim 1, characterized in that: One end of the oil inlet channel (24) and the oil outlet channel (26) both extend to the outside of the housing (10); the other end of the oil inlet channel (24) communicates with the inside of the first lubrication groove (21); and the other end of the oil outlet channel (26) communicates with the inside of the second lubrication groove (22).

3. The air-conditioning compressor screw structure with a lubrication structure according to claim 1, characterized in that: The first lubrication groove (21) and the second lubrication groove (22) are both in the shape of an inclined circular ring.

4. The air-conditioning compressor screw structure with a lubrication structure according to claim 1, characterized in that: An end of the oil inlet channel (24) close to the first lubrication groove (21) is connected to an extrusion groove (25); the extrusion groove (25) is truncated cone-shaped; the diameter of one end of the extrusion groove (25) is the same as the diameter of the oil inlet channel (24); the diameter of the other end of the extrusion groove (25) is smaller than the diameter of the oil inlet channel (24).

5. The air-conditioning compressor screw structure with a lubrication structure according to claim 4, characterized in that: The end of the extrusion groove (25) with a smaller diameter faces the first lubrication groove (21); and the diameter of the end of the extrusion groove (25) close to the first lubrication groove (21) is smaller than the diameter of the first lubrication groove (21).

6. The air-conditioning compressor screw structure with a lubrication structure according to claim 1, characterized in that: The cross section of the oil outlet channel (26) is elliptical; the longitudinal diameter of the oil outlet channel (26) is smaller than the diameter of the second lubrication groove (22); and the transverse diameter of the oil outlet channel (26) is larger than the diameter of the second lubrication groove (22).

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