High-performance slide valve vacuum pump

Abstract

The utility model discloses a high-performance slide valve vacuum pump which comprises a pump body and a driving source, a main shaft and a slide valve eccentric wheel mechanism are arranged in the pump body, the driving source drives the main shaft to rotate so as to drive the slide valve eccentric wheel mechanism to work, the driving source comprises a motor and a transmission assembly, and the transmission assembly comprises a belt wheel and a belt. The belt wheels are arranged on an output shaft of the motor and the main shaft respectively and connected through a belt, a gap exists between the pump body and the transmission assembly to form an interval cavity, an air supplementing pipe is arranged on the side, facing the transmission assembly, of the pump body, a one-way valve and an on-off valve are arranged on the air supplementing pipe, one end of the air supplementing pipe is communicated with the interior of the pump body, and the other end of the air supplementing pipe is bent and extends out of the interval cavity. When the sliding valve vacuum pump works, external air is supplemented into the pump body through the air supplementing pipe, the exhaust valve in the pump body is opened in advance by mixed gas to exhaust the mixed gas, the situation that water vapor is mixed into oil liquid is reduced, the vacuum degree in the sliding valve vacuum pump is improved, and a worker can operate the opening and closing valve more conveniently and safely.

Description

Technical Field

[0001] The utility model relates to the field of vacuum pumps, in particular to a high-performance sliding valve vacuum pump. Background Art

[0002] The sliding valve vacuum pump is a variable volume gas transmission pump that uses a sliding valve mechanism to change the volume of the suction chamber. It is one of the vacuum pumping equipment that removes general gases or gases containing a small amount of condensable vapor. The vacuum pumping speed is very sensitive to dust and water vapor in the extracted gas. The sliding valve vacuum pump is widely used in aerospace, biomedicine, vacuum metallurgy, vacuum welding, vacuum heat treatment, vacuum drying, pharmaceutical chemicals, optoelectronics, solar photovoltaic and other industries.

[0003] The gas extracted by the sliding valve vacuum pump during actual operation contains water vapor. As the pressure in the pump continues to increase during operation, when the pressure increases to a certain level, water vapor is likely to mix into the pump oil. When the pump oil contains water vapor, it will ultimately affect the vacuum pump in the pump and affect the performance of the sliding valve vacuum pump. Utility Model Content

[0004] In order to further improve the vacuum degree of the pump body, the present application provides a high-performance sliding valve vacuum pump.

[0005] The present application provides a high-performance sliding valve vacuum pump, which adopts the following technical solution:

[0006] A high-performance sliding valve vacuum pump comprises a pump body and a driving source, wherein a main shaft and a sliding valve eccentric wheel mechanism are arranged in the pump body, wherein the driving source drives the main shaft to rotate and the main shaft rotates to drive the sliding valve eccentric wheel mechanism to work, wherein the driving source comprises a motor and a transmission assembly, wherein the transmission assembly comprises a pulley and a belt, wherein the pulleys are respectively arranged on the output shaft and the main shaft of the motor and are connected by a belt, wherein a spacing is formed between the pump body and the transmission assembly, wherein an air supply pipe is arranged on the side of the pump body facing the transmission assembly, wherein a one-way valve and an opening and closing valve are arranged on the air supply pipe, wherein one end of the air supply pipe is connected to the inside of the pump body, and the other end is bent and extends out of the spacing cavity, wherein the opening and closing valve is located outside the spacing cavity.

[0007] Optionally, the width of the transmission assembly is smaller than the width of the pump body and is in an empty area on one side of the transmission assembly. The opening and closing valve is a ball valve, which includes a valve body and a handle. The handle is located on a side of the valve body away from the pump body, and the handle is located in the empty area.

[0008] Optionally, the transmission assembly is wrapped with an outer shell, which includes a shell and end plates on both sides, and a through hole for the main shaft to pass through is opened at the bottom of the end plate close to the pump body.

[0009] Optionally, a connection assembly is provided between the pump body and the shell to connect the two, and the connection assembly includes a connection column and a stud, one end of the connection column is fixed to the pump body, and the stud passes through the shell and is threadedly connected to the connection column.

[0010] Optionally, the motor is installed on the top of the pump body, the top of the pump body has a mounting column, the bottom of the motor has a base, the mounting column has a threaded column vertically passing through the base, the threaded column is threaded with a nut, the nuts are respectively located on the upper and lower sides of the base and abut against the surface of the base.

[0011] Optionally, the bottom of the pump body has a seat body detachably connected thereto, and a concave groove is provided on the bottom wall of the seat body, and two sides of the groove pass through two opposite side walls of the seat body.

[0012] Optionally, the pulley includes a driving wheel and a driven wheel, the driving wheel is connected to the output shaft of the motor, the driven wheel is connected to the main shaft, and the outer diameter of the driving wheel is smaller than the outer diameter of the driven wheel.

[0013] Optionally, the stud is staggered with the belt, and the part of the stud located inside the housing has a tensioning portion for abutting against and in line contact with the belt.

[0014] In summary, the present application includes at least one of the following beneficial technical effects:

[0015] 1. Through the setting of the air supply pipe and the one-way valve, the outside air can be supplied to the pump body through the air supply pipe during the working process, thereby increasing the mixed gas pressure in the pump body, so that the mixed gas opens the exhaust valve in the pump body in advance to discharge the gas, reducing the mixing of water vapor into the oil, achieving the purpose of increasing the vacuum degree in the slide valve vacuum pump and improving the overall performance of the slide valve vacuum pump;

[0016] 2. The end of the air supply pipe is bent and extends out of the partition cavity, and the opening and closing valve is located outside the partition cavity, which makes it easier for the staff to operate the opening and closing valve, improves the convenience of operation, and also prevents the staff from reaching into the partition cavity to operate and being easily injured by the transmission components, effectively improving the safety of operation and use;

[0017] 3. The setting of the one-way valve allows the gas to flow only from the outside to the inside of the air supply pipe, and the air supply pipe will not spray oil out when it is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall structural diagram of an embodiment of the present application.

[0019] Figure 2 It is a structural diagram of the air supplement pipe in the embodiment of the present application.

[0020] Figure 3 It is a structural diagram of the connection of the transmission component in the embodiment of the present application.

[0021] Figure 4 It is a diagram of the internal structure of the transmission assembly in the embodiment of the present application.

[0022] Description of reference numerals:

[0023] 1. Pump body; 3. Main shaft; 4. Air inlet; 5. Exhaust port; 6. Motor; 7. Transmission assembly; 8. Partition chamber; 9. Air supply pipe; 10. One-way valve; 11. Opening and closing valve; 12. Belt; 13. Driving wheel; 14. Driven wheel; 15. Shell; 16. Shell; 17. End plate; 18. Perforation; 19. Empty area; 20. Valve body; 21. Handle; 22. Connecting column; 23. Stud; 24. Base; 25. Mounting column; 26. Threaded column; 27. Nut; 28. Seat; 29. ​​Groove; 30. Screw; 31. Tensioning part. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-4 This application is described in further detail.

[0025] The embodiment of the present application discloses a high-performance sliding valve vacuum pump.

[0026] A high performance sliding valve vacuum pump, such as Figure 1-Figure 3 As shown, it includes a pump body 1 and a driving source. The pump body 1 has a pump chamber inside and a sliding valve eccentric wheel mechanism is arranged in the pump chamber. A main shaft 3 is rotatably connected in the pump body 1, and the sliding valve eccentric wheel mechanism is connected to the main shaft 3. The driving source is used to drive the main shaft 3 to rotate so as to drive the sliding valve eccentric wheel mechanism to rotate. An air inlet 4 and an exhaust port 5 connected to the pump chamber are also arranged on the pump body 1. Through the continuous rotation of the sliding valve eccentric wheel mechanism, the air inlet 4 inhales external air and then discharges it from the exhaust valve after internal supercharging, and finally discharges it from the exhaust port 5. In this embodiment, the sliding valve eccentric wheel mechanism has multiple sliding valve eccentric wheel mechanisms along the axial direction of the main shaft 3 and is arranged in an integrated manner, which can effectively improve the working efficiency of the sliding valve vacuum pump.

[0027] like Figure 1-Figure 3As shown, the driving source includes a motor 6 and a transmission component 7, the transmission component 7 connects the motor 6 and the main shaft 3, the transmission component 7 is arranged on one side of the pump body 1, the transmission component 7 transmits the output power of the motor 6 to the main shaft 3 to drive it to rotate, there is a distance between the transmission component 7 and the pump body 1 and a spacing cavity 8 is formed, and an air supply pipe 9 is arranged at the pump body 1 corresponding to the spacing cavity 8, one end of the air supply pipe 9 is connected to the pump cavity inside the pump body 1, and the other end is bent and extends out of the spacing cavity 8 to communicate with the outside atmosphere, and a one-way valve 10 and an opening and closing valve 11 are arranged on the air supply pipe 9 in sequence, the one-way valve 10 allows the air supply pipe 9 to only allow outside air to enter the pump cavity, so that the air supply pipe 9 will not flow out during specific use. The phenomenon of oil spraying; in this way, during the operation, the external air can be supplemented into the pump body 1 through the air supply pipe 9, thereby increasing the mixed gas pressure in the pump body 1, so that the mixed gas opens the exhaust valve in the pump body 1 in advance to discharge the gas, and reduces the mixing of water vapor into the oil, thereby achieving the purpose of increasing the vacuum degree in the sliding valve vacuum pump and improving the overall performance of the sliding valve vacuum pump. Moreover, the end of the air supply pipe 9 is bent and extends out of the partition cavity 8 and the opening and closing valve 11 is located outside the partition cavity 8, which makes it easier for the staff to operate the opening and closing valve 11, thereby improving the convenience of operation. At the same time, it also avoids the situation where the staff puts their hands into the partition cavity 8 for operation and is easily injured by the transmission component 7, thereby effectively improving the safety of operation and use.

[0028] like Figure 3 and Figure 4 As shown, the transmission assembly 7 includes a pulley and a belt 12, and the pulley includes a driving wheel 13 and a driven wheel 14, wherein the driving wheel 13 is installed on the output shaft of the motor 6, and the driven wheel 14 is installed on the main shaft 3, and the driving wheel 13 and the driven wheel 14 are connected by the belt 12 to realize transmission, and the transmission assembly 7 also includes an externally wrapped shell 15, the shell 15 includes a shell 16 and end plates 17 on both sides, the end plates 17 and the shell 16 are detachably connected by screws 30, and a through hole 18 for the main shaft 3 to pass through is provided at the bottom of the end plate 17 close to the pump body 1 side, and the main shaft 3 passes through the through hole 18 to facilitate connection with the driven wheel 14 located in the shell 16, and the setting of the shell 16 and the end plate 17 can shield and protect the driving wheel 13, the driven wheel 14 and the belt 12 inside the transmission assembly 7 to avoid accidental touch and collision, thereby further improving the safety of use and operation.

[0029] like Figure 1 and Figure 3 As shown, in this embodiment, the width of the transmission assembly 7 is smaller than the width of the pump body 1 and an empty area 19 is formed on one side of the transmission assembly 7. The opening and closing valve 11 adopts a ball valve, which includes a valve body 20 and a handle 21. The handle 21 is located on the side of the valve body 20 away from the pump body 1, and the handle 21 is located in the empty area 19. In this way, the empty area 19 provides the handle 21 with corresponding operating space, which facilitates the turning of the handle 21 to realize the opening and closing operation.

[0030] like Figure 1-Figure 3 As shown, a connecting assembly is provided between the pump body 1 and the outer shell 15 to fix the two together. The connecting assembly includes a connecting column 22 and a stud 23. The connecting column 22 is fixedly mounted on the outer wall of the pump body 1. The stud 23 passes through the two end plates 17 of the outer shell 15 and the ends are threadedly connected to the stud 23 to achieve connection and fixation. There are multiple groups of connecting assemblies arranged above and below to achieve stability of the transmission assembly 7 during operation, reduce vibration and reduce noise.

[0031] like Figure 1 and Figure 3 As shown, the motor 6 is fixedly installed on the top of the pump body 1, and the bottom of the motor 6 has a base 24. The top of the pump body 1 has a vertically fixed mounting column 25, and the mounting column 25 has a threaded column 26 that vertically passes through the base 24. Two nuts 27 are threadedly connected to the threaded column 26, and the nuts 27 are respectively located on the upper and lower side surfaces of the base 24. In this way, by rotating the position of the nut 27 on the threaded column 26, the height position of the motor 6 can be fine-tuned, thereby achieving a change in the height of the driving wheel 13 to ensure that the belt 12 can always maintain a tensioned and good use state.

[0032] like Figure 3 and Figure 4 As shown, a seat body 28 detachably connected to the pump body 1 is provided at the bottom thereof, and the bottom wall of the seat body 28 has an inwardly concave groove 29, and the two sides of the groove 29 penetrate the two opposite side walls of the seat body 28. The seat body 28 and the pump body 1 are detachably connected by a screw 30, and the head of the screw 30 is located in the groove 29 and does not contact the ground. The screw 30 is well concealed, and the setting of the groove 29 reserves space for rotating the screw 30, which is convenient for disassembly and assembly operations. In this way, a suitable seat body 28 can be selected as needed to adapt to the installation and fixation needs of the pump body 1 in different occasions.

[0033] like Figure 4 As shown, in this embodiment, the outer diameter of the driving wheel 13 is smaller than the outer diameter of the driven wheel 14, so that it can play a certain deceleration role in the power transmission process, and the position of the stud 23 is offset from the belt 12 so that the two will not interfere with each other. The part of the stud 23 located inside the shell 16 has a tensioning portion 31 that abuts and contacts the belt 12 in a line. The tensioning portion 31 abuts against the belt 12 to partially bend it to tension it, ensuring the good performance of the belt 12 transmission and not prone to loosening, thereby realizing the multi-purpose of the stud 23.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-performance sliding valve vacuum pump, comprising a pump body (1) and a driving source, wherein a main shaft (3) and a sliding valve eccentric wheel mechanism are arranged in the pump body (1), and the driving source drives the main shaft (3) to rotate to drive the sliding valve eccentric wheel mechanism to work, characterized in that: The driving source comprises a motor (6) and a transmission assembly (7), the transmission assembly (7) comprises a pulley and a belt (12), the pulleys are respectively arranged on the output shaft of the motor (6) and the main shaft (3) and are connected via the belt (12), a spacing is provided between the pump body (1) and the transmission assembly (7) to form a spacing cavity (8), an air supply pipe (9) is provided on the side of the pump body (1) facing the transmission assembly (7), a one-way valve (10) and an on-off valve (11) are provided on the air supply pipe (9), one end of the air supply pipe (9) is connected to the inside of the pump body (1), and the other end is bent and extends out of the spacing cavity (8), and the on-off valve (11) is located outside the spacing cavity (8).

2. A high performance sliding valve vacuum pump according to claim 1, characterized in that: The width of the transmission assembly (7) is smaller than the width of the pump body (1) and is located in an empty area (19) on one side of the transmission assembly (7). The on-off valve (11) is a ball valve, and the ball valve comprises a valve body (20) and a handle (21). The handle (21) is located on a side of the valve body (20) away from the pump body (1), and the handle (21) is located in the empty area (19).

3. A high performance sliding valve vacuum pump according to claim 1, characterized in that: The transmission assembly (7) is wrapped with an outer shell (15), and the outer shell (15) includes a shell (16) and end plates (17) on both sides. A through hole (18) for the main shaft (3) to pass through is provided at the bottom of the end plate (17) close to the pump body (1).

4. A high performance sliding valve vacuum pump according to claim 3, characterized in that: A connection assembly is provided between the pump body (1) and the housing (15) to connect the two. The connection assembly comprises a connection column (22) and a stud (23). One end of the connection column (22) is fixed to the pump body (1), and the stud (23) passes through the housing (15) and is threadedly connected to the connection column (22).

5. A high performance sliding valve vacuum pump according to claim 1, characterized in that: The motor (6) is mounted on the top of the pump body (1). The top of the pump body (1) is provided with a mounting column (25). The bottom of the motor (6) is provided with a base (24). The mounting column (25) has a threaded column (26) vertically passing through the base (24). A nut (27) is threadedly connected to the threaded column (26). The nut (27) is respectively located on the upper and lower sides of the base (24) and abuts against the surface of the base (24).

6. A high performance sliding valve vacuum pump according to claim 1, characterized in that: The bottom of the pump body (1) has a seat body (28) detachably connected thereto, and a concave groove (29) is provided on the bottom wall of the seat body (28), and two sides of the groove (29) penetrate two opposite side walls of the seat body (28).

7. A high performance sliding valve vacuum pump according to claim 1, characterized in that: The pulley comprises a driving wheel (13) and a driven wheel (14), wherein the driving wheel (13) is connected to the output shaft of the motor (6), and the driven wheel (14) is connected to the main shaft (3), and the outer diameter of the driving wheel (13) is smaller than the outer diameter of the driven wheel (14).

8. A high performance sliding valve vacuum pump according to claim 4, characterized in that: The stud (23) and the belt (12) are arranged in a staggered manner, and the part of the stud (23) located inside the housing (16) has a tensioning portion (31) for abutting against and in line contact with the belt (12).

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