Pump head shell of double-screw air compressor

Abstract

The utility model discloses a double-screw air compressor pump head shell which comprises a shell body, a first positioning disc and a second positioning disc, the circumferential face of the middle of the shell body is provided with the first positioning disc in an outward protruding mode, a protruding screw cavity is formed in front of the first positioning disc, the circumferential face of the tail of the shell body is provided with the second positioning disc, and the second positioning disc is parallel to the first positioning disc. The first positioning disc and the second positioning disc can position and fix the shell in the horizontal direction; a plurality of longitudinal positioning holes are formed in the bottom of the first positioning disc and the bottom of the second positioning disc, the longitudinal positioning holes are parallel to one another, and the longitudinal positioning holes can position and fix the shell in the vertical direction; the shell can be kept stable in the horizontal direction and the vertical direction and can resist horizontal twisting force at the same time, and therefore the pump head has excellent installation stability, is not prone to shaking and damage after being used for a long time, and has a very strong protection effect on an internal screw rod.

Description

Technical Field

[0001] The utility model belongs to the technical field of air compressor accessories, and in particular relates to a pump head shell of a twin-screw air compressor. Background Art

[0002] Air compressors are essential equipment for various factories, road construction, mining and construction industries. They are mainly used to provide a steady supply of compressed air with a certain pressure, such as supplying air to pneumatic valves and providing air sources for process flows that require a certain pressure of gas. Twin-screw air compressors are a type of double-shaft positive displacement rotary air compressor. They consist of a pair of parallel, intermeshing rotors. When working, one rotor rotates counterclockwise. During the intermeshing process, the air is compressed to the required pressure. Twin-screw air compressors have the advantages of long life, low noise, and more energy saving. They are currently the air compressors with the highest market share.

[0003] The pump head of a twin-screw air compressor is also called the main engine. It is the core structure of the twin-screw air compressor. One end of the pump head is connected to the motor and the other end is connected to the oil-gas separation tank. The motor provides power for the pump head, and the compressed air output by the pump head is stored in the oil-gas separation tank. Since the motor and the twin screws in the pump head will generate strong vibrations during operation, in order to resist vibration, the pump head housing should be kept as stable as possible. The existing pump head is mainly fixed on the oil-gas separation tank by supporting it with a steel pipe and tightened with screws. The steel pipe support has poor stability and cannot resist vibration. The screw setting position is also relatively simple. When the equipment is working, the vibration of the pump head includes both horizontal and vertical directions. After long-term vibration in multiple directions, a single screw is also easy to loosen and fall off, making the vibration resistance of the pump head worse and affecting the operation of the internal twin screws. Utility Model Content

[0004] In view of the above problems and technical requirements, the utility model provides a twin-screw air compressor pump head housing. By improving the housing, the vibration resistance of the pump head is improved, and the pump head is fixed from multiple directions so that the pump head can remain stable during long-term use.

[0005] The technical solution of the utility model is as follows: a twin-screw air compressor pump head housing, including a shell, a first positioning plate and a second positioning plate, a first positioning plate protruding outwardly on the circumference of the middle part of the shell, a protruding screw cavity in front of the first positioning plate, a second positioning plate provided on the circumference of the rear part of the shell, the second positioning plate is parallel to the first positioning plate, and the first positioning plate and the second positioning plate can position and fix the shell in the horizontal direction; a plurality of longitudinal positioning holes are provided on the bottom of the first positioning plate and the second positioning plate, and the longitudinal positioning holes are parallel to each other, and the longitudinal positioning holes can position and fix the shell in the vertical direction. In the above scheme, the longitudinal positioning holes position the shell in the vertical direction, and the first positioning plate and the second positioning plate position the shell in the horizontal direction, so the shell has the effect of resisting vibration in both vertical and horizontal directions, and the pump head is not easy to shake after long-term use.

[0006] Furthermore, the shell between the first positioning plate and the second positioning plate is an air inlet cavity, and an air inlet is provided on the top of the air inlet cavity, and the air inlet introduces external air into the air inlet cavity.

[0007] Furthermore, the bottom of the air inlet cavity and the first positioning plate and the second positioning plate enclose a U-shaped positioning groove, which can be embedded in a base for placing the shell, so that the horizontal support and limitation of the shell are strengthened.

[0008] Furthermore, two longitudinal positioning holes are provided at the bottom of the second positioning plate, a longitudinal positioning hole is provided on the front plate surface of the first positioning plate, and the three longitudinal positioning holes are arranged in an acute-angle triangle structure. The three longitudinal positioning holes are connected by a triangle structure, and when the shell receives a side collision or pressure, the triangle structure provides a stable supporting force to keep the shell stable.

[0009] Furthermore, an air outlet pipe leading to the outside is provided at the bottom of the screw cavity, and the air outlet pipe outputs the compressed air from the shell. The above-mentioned air inlet cavity inhales clean air, and the inside of the shell is two meshing and rolling twin screws, which continuously pressurize the air, and the compressed air is finally output through the air outlet pipe in front.

[0010] Furthermore, the first positioning plate is circular, and a circle of horizontal connection holes is provided on the edge of the first positioning plate.

[0011] Furthermore, the outer periphery of the second positioning plate is provided with a plurality of connecting ears, each connecting ear is provided with a fixing screw hole. The rear side of the second positioning plate is connected to the housing of the motor, and the fixing screw hole is used for fastening and connecting with the motor.

[0012] Furthermore, a screw input shaft extends outward from the rear end of the shell, and the screw output shaft is connected to an external power device to transmit power to the inside of the shell.

[0013] Furthermore, the air inlet cavity, the first positioning plate and the second positioning plate are an integrally formed part.

[0014] The beneficial effects of the utility model are as follows: the first positioning plate, the U-shaped positioning groove and the second positioning plate are arranged on the pump head shell in the horizontal direction. When the shell is installed, the base matched therewith can be engaged and connected with the U-shaped positioning groove, so that the U-shaped positioning groove and the two positioning plates can horizontally position the shell, and the horizontal connecting hole on the first positioning plate can lock the shell, so that when the shell is subjected to horizontal vibration, it can remain stable; the three longitudinal positioning holes arranged at the bottom of the first positioning plate and the second positioning plate are locked with the external base, and the three longitudinal positioning holes form an acute triangle, which can resist the side impact force, so that the shell can not only remain stable in the vertical direction, but also resist the horizontal torsional force. Therefore, the pump head has excellent installation stability, is not easy to shake and be damaged during long-term use, and has a strong protection effect on the internal screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The three-dimensional structure of the pump head shell of the utility model twin-screw air compressor Figure 1 ;

[0016] Figure 2 The three-dimensional structure of the pump head shell of the utility model twin-screw air compressor Figure 1 ;

[0017] Marked in the figure are: shell 1, air inlet cavity 11, air inlet 111, screw cavity 12, air outlet pipe 121, screw input shaft 13, first positioning plate 2, horizontal connecting hole 21, second positioning plate 3, connecting ear 31, fixing screw hole 32, U-shaped positioning groove 4, longitudinal positioning hole 5. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1-2 The figure shows the pump head housing of the twin-screw air compressor of the utility model, which includes a shell 1, a first positioning plate 2 and a second positioning plate 3. The first positioning plate 2 is protruding outward from the circumferential surface of the middle part of the shell 1, and a protruding screw cavity 12 is in front of the first positioning plate 2. A second positioning plate 3 is provided on the circumferential surface of the rear part of the shell 1. The second positioning plate 3 is parallel to the first positioning plate 2. The first positioning plate 2 and the second positioning plate 3 can position and fix the shell 1 in the horizontal direction.

[0020] A U-shaped positioning groove 4 is formed between the bottom of the air inlet cavity 11 and the first positioning disk 2 and the second positioning disk 3. The air inlet cavity 11, the first positioning disk 2 and the second positioning disk 3 are an integrally formed part. The first positioning disk 2 is circular, and a circle of horizontal connecting holes 21 is provided on the edge of the first positioning disk 2. A plurality of connecting ears 31 are provided on the outer periphery of the second positioning disk 3, and each connecting ear 31 is provided with a fixing screw hole 32. A screw input shaft 13 extends outward from the rear end of the shell 1, and the screw output shaft 13 is connected to an external power device to transmit power to the inside of the shell. The rear side of the second positioning disk 3 is connected to the casing of the motor, and the fixing screw hole 32 is used to fasten it to the motor.

[0021] The bottom of the first positioning plate 2 and the second positioning plate 3 is provided with a plurality of longitudinal positioning holes 5, and the longitudinal positioning holes 5 are parallel to each other. The longitudinal positioning holes 5 can vertically position and fix the shell 1. Specifically, two longitudinal positioning holes 5 are provided at the bottom of the second positioning plate 3, and a longitudinal positioning hole 5 is provided on the front side of the first positioning plate 2. The three longitudinal positioning holes 5 are arranged in an acute triangle structure. The three longitudinal positioning holes are connected by a triangular structure. When the shell is subjected to a side collision or pressure, the triangular structure provides a stable support force to keep the shell stable.

[0022] The shell between the first positioning plate 2 and the second positioning plate 3 is an air inlet chamber 11, and an air inlet port 111 is provided at the top of the air inlet chamber 11, and the air inlet port 111 introduces external air into the air inlet chamber 11. An air outlet pipe 121 leading to the outside is provided at the bottom of the screw chamber 12, and the air outlet pipe 121 outputs the compressed air from the shell 1. The above-mentioned air inlet chamber 11 inhales clean air, and the inside of the shell is two meshing and rolling twin screws, which continuously pressurize the air, and the compressed air is finally output through the front air outlet pipe 121.

[0023] The application principle of the utility model is as follows: when the shell 1 is installed, the rear of the shell is connected to the motor, and the bottom surface of the front of the shell is connected to gas storage equipment such as the oil-gas separation tank. Therefore, the air inlet chamber 11 in the middle of the shell is matched and connected with the external base; the external base can be set on the top of the oil-gas separation tank, and can also be set separately, and the shape of the external base must correspond to the U-shaped positioning groove 4; when installing, the U-shaped positioning groove 4 is correspondingly embedded in the base, so that the first positioning plate 2 and the second positioning plate 3 clamp the base from both sides, the horizontal connecting hole 21 locks the base and the shell 1 in the horizontal direction, and the longitudinal positioning hole 5 locks the base and the shell 1 in the vertical direction. The fixing screw hole 32 on the second positioning plate 3 is connected to the motor at the rear, and the motor provides mechanical power to the shell through the screw input shaft 13.

[0024] The above are only several preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes and substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A twin-screw air compressor pump head housing, characterized in that: It includes a shell, a first positioning plate and a second positioning plate. The first positioning plate is protruding outward from the circumferential surface of the middle part of the shell. The front of the first positioning plate is a protruding screw cavity. The second positioning plate is provided on the circumferential surface of the rear part of the shell. The second positioning plate is parallel to the first positioning plate. The first positioning plate and the second positioning plate can position and fix the shell in the horizontal direction. The bottom of the first positioning plate and the second positioning plate is provided with a plurality of longitudinal positioning holes, which are parallel to each other, and the longitudinal positioning holes can position and fix the shell in the vertical direction.

2. A twin-screw air compressor pump head housing according to claim 1, characterized in that: The shell between the first positioning plate and the second positioning plate is an air inlet cavity, and an air inlet is provided on the top of the air inlet cavity, and the air inlet introduces external air into the air inlet cavity.

3. A twin-screw air compressor pump head housing according to claim 2, characterized in that: The bottom of the air inlet cavity and the first positioning plate and the second positioning plate form a U-shaped positioning groove.

4. A twin-screw air compressor pump head housing according to claim 3, characterized in that: The second positioning plate has two longitudinal positioning holes at the bottom, and the front surface of the first positioning plate has one longitudinal positioning hole. The three longitudinal positioning holes are arranged in an acute triangle structure.

5. A twin-screw air compressor pump head housing according to claim 4, characterized in that: An air outlet pipe leading to the outside is arranged at the bottom of the screw cavity, and the air outlet pipe outputs the compressed air from the shell.

6. A twin-screw air compressor pump head housing according to claim 5, characterized in that: The first positioning plate is circular, and a circle of horizontal connection holes is arranged on the edge of the first positioning plate.

7. A twin-screw air compressor pump head housing according to claim 6, characterized in that: A plurality of connecting ears are arranged on the outer periphery of the second positioning plate, and each connecting ear is provided with a fixing screw hole.

8. A twin-screw air compressor pump head housing according to claim 7, characterized in that: A screw input shaft extends outward from the rear end of the shell, and the screw output shaft is connected to an external power device to transmit power to the inside of the shell.

9. A twin-screw air compressor pump head housing according to claim 8, characterized in that: The air inlet cavity, the first positioning plate and the second positioning plate are an integrally formed part.

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