Water-cooled screw vacuum pump

Abstract

The utility model belongs to the technical field of screw vacuum pumps, and relates to a water-cooled screw vacuum pump which comprises a pump body and a motor, and an upper cover plate, a lower cover plate, a left cover plate and a right cover plate respectively cover the upper side face, the lower side face, the left side face and the right side face of the pump body. An upper cooling channel, a left cooling channel and a right cooling channel are defined by the upper cover plate, the left cover plate and the right cover plate and the corresponding side faces of the pump body respectively, a front cooling channel is defined by the lower cover plate and the front side of the lower side face of the pump body, and a rear cooling channel is defined by the lower cover plate and the rear side of the lower side face of the pump body. The front cooling channel, the left cooling channel, the upper cooling channel, the right cooling channel and the rear cooling channel are sequentially communicated to form a pump body cooling flow channel, the motor is a water-cooled motor, a water inlet of the motor cooling flow channel is connected with a water inlet pipe, and a water outlet of the pump body cooling flow channel is connected with a water outlet pipe. A water outlet of the motor cooling flow channel is connected with a water inlet of the pump body cooling flow channel through a water passing pipe. The water-cooled screw vacuum pump provided by the utility model has a better cooling effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of screw vacuum pumps and relates to a water-cooled screw vacuum pump. Background Art

[0002] A screw vacuum pump is a pumping device that uses a pair of screws to generate suction and exhaust effects by rotating synchronously and at high speed in a pump body. The screw vacuum pump includes a pump body and a motor, and the driving screw in a pair of screws is driven by the motor. When the screws of the screw vacuum pump rotate, a large amount of heat will be generated. At the same time, heat will also be generated when the motor is working. The existing screw vacuum pumps generally use a water-cooling system to cool the pump body, while the motor uses natural cooling or air-cooling, and its heat dissipation efficiency is limited. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a water-cooled screw vacuum pump with better cooling effect.

[0004] To solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:

[0005] A water-cooled screw vacuum pump includes a pump body and a motor. The upper, lower, left, and right sides of the pump body are respectively covered with an upper cover plate, a lower cover plate, a left cover plate, and a right cover plate. The upper cover plate, the left cover plate, and the right cover plate respectively form an upper cooling channel, a left cooling channel, and a right cooling channel with the corresponding sides of the pump body. The lower cover plate forms a front cooling channel with the front side of the lower side of the pump body and a rear cooling channel with the rear side of the lower side of the pump body. The front cooling channel, the left cooling channel, the upper cooling channel, the right cooling channel, and the rear cooling channel are sequentially connected to form a pump body cooling flow path. The motor is a water-cooled motor. The water inlet of the motor cooling flow path is connected to a water inlet pipe, and the water outlet of the pump body cooling flow path is connected to a water outlet pipe. The water outlet of the motor cooling flow path and the water inlet of the pump body cooling flow path are connected through a water pipe.

[0006] In the above water-cooled screw vacuum pump, the water-cooled motor refers to a motor provided with a water-cooling flow path. The water-cooling flow path can be arranged on a water-cooling sleeve outside the motor or directly arranged in the motor housing.

[0007] In the above water-cooled screw vacuum pump, the upper cooling channel, the left cooling channel, the right cooling channel, the front cooling channel, and the rear cooling channel are all labyrinth channels. In the utility model, the labyrinth channel refers to a channel structure with multiple bent shapes.

[0008] In the above-mentioned water-cooled screw vacuum pump, the upper cover plate, lower cover plate, left cover plate and right cover plate are all of planar structure. Maze grooves are provided on the upper, lower, left and right sides of the pump body, and the maze grooves and the planar structure enclose a maze channel. Further, annular sealing grooves are provided on the outer edges of the upper, lower, left and right sides of the pump body, and sealing rings for sealing connection with each cover plate are arranged in the sealing grooves.

[0009] In the above-mentioned water-cooled screw vacuum pump, a gear box is provided at the rear end of the pump body, a transmission cooling pipe is arranged in the gear box, and two ends of the transmission cooling pipe are respectively connected to the water outlet of the pump body cooling flow channel and the water outlet pipe. Preferably, the transmission cooling pipe is made of stainless steel pipe.

[0010] In the above-mentioned water-cooled screw vacuum pump, the transmission cooling pipe is arranged at the bottom of the cavity of the gear box, and the transmission cooling pipe includes a plurality of horizontally distributed bends.

[0011] In the above-mentioned water-cooled screw vacuum pump, a pipe fitting mounting plate is provided on the pump body, and the pipe joints of the water inlet pipe and the water outlet pipe are both mounted on the pipe fitting mounting plate. Preferably, the pipe fitting mounting plate is an L-shaped plate, and the pipe joints of the water inlet pipe and the water outlet pipe are distributed vertically; preferably, the pipe fitting mounting plate is arranged on the left cover plate.

[0012] In the above-mentioned water-cooled screw vacuum pump, a pressure reducing valve is provided at the water inlet end of the water inlet pipe.

[0013] Compared with the prior art, the present utility model has the following beneficial effects:

[0014] 1. The present utility model provides a water-cooled screw vacuum pump, which integrates the pump body cooling system and the motor cooling system into one system. Without adding too many additional accessories, the cooling efficiency of the motor can be greatly improved. In view of the relatively low heat generation of the motor, the cooling system of the present utility model first flows through the cooling flow channel of the motor, and then sequentially flows through the cooling flow channels on the four sides of the pump body, which can produce a good cooling effect on both the motor and the pump body.

[0015] 2. The pump body cooling flow channel of the present utility model adopts the form of bottom inlet and bottom outlet, which can make the cooling water more fully fill the entire flow channel and improve the cooling effect. Further, the present utility model aggregates the water inlet pipe and the water outlet pipe at one place for pipe connection, which can make the installation more convenient.

[0016] 3. The present utility model further arranges a transmission cooling pipe in the gear box and connects it to the cooling system, which can improve the heat dissipation effect of the transmission components in the gear box. Description of the Drawings

[0017] Figure 1 is the perspective view of the present utility model;

[0018] Figure 2 is another perspective view of the present utility model;

[0019] Figure 3 is Figure 1 the internal structure diagram after removing the cover plate;

[0020] Figure 4 is Figure 2 the internal structure diagram after removing the cover plate;

[0021] Reference numerals: 1, pump body; 11, upper cover plate; 12, lower cover plate; 13, left cover plate; 14, right cover plate; 15, upper cooling channel; 16, left cooling channel; 17, right cooling channel; 18, front cooling channel; 19, rear cooling channel; 2, motor; 3, water inlet pipe; 4, water outlet pipe; 5, water bypass pipe; 6, gear box; 7, drive cooling pipe; 8, pipe fitting mounting plate; 9, pressure reducing valve. Detailed implementation manners

[0022] The present utility model will be further described below with reference to the accompanying drawings in specific embodiments. Refer to Figures 1 - 4 :

[0023] A water-cooled screw vacuum pump includes a pump body 1 and a motor 2. The upper, lower, left, and right sides of the pump body 1 are respectively covered with an upper cover plate 11, a lower cover plate 12, a left cover plate 13, and a right cover plate 14. The upper cover plate 11, the left cover plate 13, and the right cover plate 14 respectively form an upper cooling channel 15, a left cooling channel 16, and a right cooling channel 17 with the corresponding sides of the pump body 1. The lower cover plate 12 forms a front cooling channel 18 with the front side of the lower side of the pump body 1 and a rear cooling channel 19 with the rear side of the lower side of the pump body 1. The front cooling channel 18, the left cooling channel 16, the upper cooling channel 15, the right cooling channel 17, and the rear cooling channel 19 are sequentially connected to form a cooling flow channel of the pump body 1. The motor 2 is a water-cooled motor. The water inlet of the motor 2 cooling flow channel is connected to the water inlet pipe 3, and the water outlet of the pump body 1 cooling flow channel is connected to the water outlet pipe 4. The water outlet of the motor 2 cooling flow channel and the water inlet of the pump body 1 cooling flow channel are connected through the water bypass pipe 5.

[0024] In this embodiment, the water inlet pipe 3 is connected to an external cooling water system. The cooling water enters the cooling system of the screw vacuum pump through the water inlet pipe 3, first enters the water inlet of the cooling flow path of the motor 2, flows through the cooling flow path of the motor 2 to cool the motor 2, then flows out from the water outlet of the cooling flow path of the motor 2, and then flows into the water inlet of the cooling flow path of the pump body 1 (i.e., the inlet of the front cooling channel 18) through the water pipe 5. The cooling water flows through the front cooling channel 18, the left cooling channel 16, the upper cooling channel 15, the right cooling channel 17, and the rear cooling channel 19 in sequence to cool the pump body 1, and finally flows into the water outlet pipe 4 from the water outlet of the cooling flow path of the pump body 1 (i.e., the outlet of the rear cooling channel 19), and then flows into the return water pipe of the external cooling water system.

[0025] Contrast the attached Figure 3 and the attached Figure 4 , the upper cooling channel 15, the left cooling channel 16, the right cooling channel 17, the front cooling channel 18, and the rear cooling channel 19 are all labyrinth channels. In this embodiment, the labyrinth channel refers to a channel structure with multiple curved shapes. By setting the labyrinth channel, the flow area of the cooling water can be increased, and the cooling effect can be improved.

[0026] In this embodiment, the specific formation structure of each channel is: the upper cover plate 11, the lower cover plate 12, the left cover plate 13, and the right cover plate 14 are all planar structures, and labyrinth grooves are provided on the upper, lower, left, and right side surfaces of the pump body 1. The labyrinth grooves and the planar structures enclose the labyrinth channels. Further, annular sealing grooves are provided on the outer edges of the upper, lower, left, and right side surfaces of the pump body 1, and sealing rings for sealing connection with each cover plate are provided in the sealing grooves.

[0027] A gearbox 6 is provided at the rear end of the above-mentioned pump body 1, and a transmission cooling pipe 7 is provided in the gearbox 6. The two ends of the transmission cooling pipe 7 are respectively connected to the water outlet of the cooling flow path of the pump body 1 and the water outlet pipe 4. Preferably, the transmission cooling pipe 7 is made of stainless steel pipe. Through the transmission cooling pipe 7, heat dissipation can be provided for the transmission component.

[0028] Further, the transmission cooling pipe 7 is arranged at the bottom of the cavity of the gearbox 6, and the transmission cooling pipe 7 includes a plurality of horizontally distributed bends.

[0029] In order to further facilitate installation, a pipe fitting mounting plate 8 is provided on the pump body 1, and the pipe fittings of the water inlet pipe 3 and the water outlet pipe 4 are both mounted on the pipe fitting mounting plate 8. Preferably, the pipe fitting mounting plate 8 is an L-shaped plate, and the pipe fittings of the water inlet pipe 3 and the water outlet pipe 4 are distributed vertically; preferably, the pipe fitting mounting plate 8 is arranged on the left cover plate 13.

[0030] In order to reduce the pressure of the cooling water and make the equipment operate more safely, a pressure reducing valve 9 is provided at the water inlet end of the water inlet pipe 3.

[0031] The above embodiments are only preferred embodiments of the present utility model, and do not limit the protection scope of the present utility model accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model shall be covered within the protection scope of the present utility model.

Claims

1. A water-cooled screw vacuum pump, comprising a pump body (1) and a motor (2), characterized in that, The upper, lower, left and right sides of the pump body (1) are respectively covered with an upper cover plate (11), a lower cover plate (12), a left cover plate (13) and a right cover plate (14). The upper cover plate (11), the left cover plate (13) and the right cover plate (14) respectively form an upper cooling channel (15), a left cooling channel (16) and a right cooling channel (17) with the corresponding sides of the pump body (1). The lower cover plate (12) forms a front cooling channel (18) with the front side of the lower side of the pump body (1) and a rear cooling channel (19) with the rear side of the lower side of the pump body (1). The front cooling channel (18), the left cooling channel (16), the upper cooling channel (15), the right cooling channel (17) and the rear cooling channel (19) are sequentially connected to form a pump body cooling flow path. The motor (2) is a water-cooled motor. The water inlet of the motor (2) cooling flow path is connected to a water inlet pipe (3), and the water outlet of the pump body (1) cooling flow path is connected to a water outlet pipe (4). The water outlet of the motor (2) cooling flow path and the water inlet of the pump body (1) cooling flow path are connected through a bypass pipe (5).

2. The water-cooled screw vacuum pump according to claim 1, wherein The upper cooling channel (15), the left cooling channel (16), the right cooling channel (17), the front cooling channel (18) and the rear cooling channel (19) are all labyrinth channels.

3. The water-cooled screw vacuum pump according to claim 2, wherein, The upper cover plate (11), the lower cover plate (12), the left cover plate (13) and the right cover plate (14) are all planar structures. Labyrinth grooves are provided on the upper, lower, left and right sides of the pump body (1). The labyrinth grooves and the planar structures form labyrinth channels.

4. The water-cooled screw vacuum pump according to claim 1, wherein, A gear box (6) is provided at the rear end of the pump body (1). A transmission cooling pipe (7) is provided inside the gear box (6). The two ends of the transmission cooling pipe (7) are respectively connected to the water outlet of the pump body (1) cooling flow path and the water outlet pipe (4).

5. The water-cooled screw vacuum pump according to claim 4, characterized in that, The transmission cooling pipe (7) is arranged at the bottom of the cavity of the gear box (6). The transmission cooling pipe (7) includes a plurality of horizontally distributed bends.

6. The water-cooled screw vacuum pump according to claim 1, wherein A pipe fitting mounting plate (8) is provided on the pump body (1). The pipe joints of the water inlet pipe (3) and the water outlet pipe (4) are both mounted on the pipe fitting mounting plate (8).

7. The water-cooled screw vacuum pump according to claim 1, characterized in that A pressure reducing valve (9) is provided at the water inlet end of the water inlet pipe (3).

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