Hybrid vacuum pump structure

Abstract

The utility model discloses a hybrid vacuum pump structure which comprises a first-stage pump, a second-stage pump and a water-steam separator, the second-stage pump is arranged on one side of the first-stage pump, the water-steam separator is arranged on one side of the second-stage pump, the first-stage pump comprises a first motor and a first-stage pump body, the first motor is arranged on one side of the first-stage pump body, and the second-stage pump comprises a second-stage pump body and a second motor. The second motor is arranged on one side of the second-stage pump body, the input end of the second-stage pump body is connected with the output end of the first-stage pump body, and the output end of the second-stage pump body is connected with the input end of the water-steam separator. The first-stage pump and the second-stage pump can be connected to form a two-stage pump, so that the total compression ratio is borne by the two-stage pump, the ultimate vacuum degree can be improved, and the problems that the compression ratio is low, the pressure difference is small and the pumping pressure power is insufficient when a single vacuum pump works can be effectively solved; the water vapor discharged by the secondary pump can be separated, and the gas can be discharged.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a hybrid vacuum pump structure. Background Art

[0002] A vacuum pump is a device that uses various methods to generate, improve and maintain vacuum in a closed space. A vacuum pump can be defined as a device or equipment that uses mechanical, physical, chemical or physicochemical methods to evacuate the container to obtain a vacuum. With the development of vacuum applications, many types of vacuum pumps have been developed, and their pumping speeds range from a few tenths of a liter per second to hundreds of thousands or millions of liters per second. The ultimate pressure (ultimate vacuum) ranges from rough vacuum to extremely high vacuum above 10-12Pa. A pure vacuum pump refers to a device or equipment that uses mechanical, physical, chemical or physicochemical methods to evacuate the container to obtain a vacuum. In layman's terms, a vacuum pump is a device that uses various methods to improve, generate and maintain vacuum in a closed space. Vacuum pumps can basically be divided into two types, namely gas capture pumps and gas transmission pumps. It is widely used in metallurgy, chemical industry, food, electronic coating and other industries;

[0003] However, a single vacuum pump has a large error due to its single working mode, and is limited to a vacuum pump with a single structure, which has a low compression ratio, a small pressure difference, and insufficient pump pressure power. Therefore, it is urgent to design a hybrid vacuum pump structure to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a hybrid vacuum pump structure to solve the above-mentioned deficiencies in the prior art.

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

[0006] A hybrid vacuum pump structure includes a primary pump, a secondary pump and a water vapor separator, wherein the secondary pump is arranged on one side of the primary pump, and the water vapor separator is arranged on one side of the secondary pump. The primary pump includes a first motor and a primary pump body, and the first motor is arranged on one side of the primary pump body. The secondary pump includes a secondary pump body and a second motor, and the second motor is arranged on one side of the secondary pump body. The input end of the secondary pump body is connected to the output end of the primary pump body, and the output end of the secondary pump body is connected to the input end of the water vapor separator.

[0007] An oil chamber and a pump cavity are provided in the first-stage pump body, the oil chamber is located on the upper side of the pump cavity, a rotor is eccentrically installed in the pump cavity, one end of the rotor is fixedly connected to the output end of the first motor, rotor grooves are provided on both sides of the rotor, two rotors are slidably installed in the rotor grooves, a spring is fixedly installed between the two rotors, a first air inlet and a first air outlet are provided on the upper side of the first-stage pump body, the first air inlet is connected to the pump cavity, the first air outlet is connected to the oil chamber, an exhaust hole is provided between the oil chamber and the pump cavity, an exhaust valve is fixedly installed on the upper side of the exhaust hole, and the exhaust valve corresponds to the first air outlet.

[0008] A pump cover is fixedly installed on one side of the secondary pump body, a second air inlet and a second air outlet are arranged on the upper side of the pump cover, an exhaust port and an air intake port are opened on one side of the pump cover, an impeller is eccentrically installed between the inner walls of the secondary pump body, the impeller corresponds to the second air inlet and the second air outlet, one end of the impeller is fixedly connected to the second motor, and a diffuser is fixedly installed between the second air inlet and the first air outlet.

[0009] A refueling port is provided on the upper side of the oil chamber, an oil drain port is provided on one side of the oil chamber, and an oil level indicator is provided on one side of the oil chamber.

[0010] A delivery pipe is fixedly installed between the second air outlet and the input end of the water vapor separator, and a discharge port is arranged on the upper side of the water vapor separator.

[0011] A first bottom plate is fixedly installed on the lower side of the primary pump body and the first motor, and a second bottom plate is fixedly installed between the secondary pump body and the second motor.

[0012] In the above technical solution, the utility model provides a hybrid vacuum pump structure, which has the following beneficial effects:

[0013] (1) By setting up a primary pump and a secondary pump, they can be connected to form a two-stage pump, so that the total compression ratio is borne by the two-stage pump, thereby improving the ultimate vacuum degree and effectively solving the problem of low compression ratio, small pressure difference and insufficient pump pressure power of a single vacuum pump during operation.

[0014] (2) By setting up a water vapor separator, the water vapor discharged by the secondary pump can be separated and the gas can be discharged. At the same time, the separated water can be stored so that the separated water can be reused, thereby reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 The utility model provides a schematic diagram of the overall structure of a hybrid vacuum pump structure embodiment.

[0017] Figure 2 A schematic diagram of the cross-sectional structure of a first-stage pump provided for a hybrid vacuum pump structural embodiment of the utility model.

[0018] Figure 3 A schematic diagram of the cross-sectional structure of a two-stage pump provided for a hybrid vacuum pump structure embodiment of the utility model.

[0019] 1. Primary pump; 2. Secondary pump; 3. Water vapor separator; 4. First base plate; 5. First motor; 7. Primary pump body; 9. First air inlet; 10. Oil drain port; 11. Oil filling port; 12. Oil level indicator; 13. First air outlet; 14. Oil chamber; 15. Pump cavity; 16. Rotor; 17. Rotor slot; 18. Vane; 19. Spring; 20. Exhaust valve; 21. Diffuser; 22. Secondary pump body; 23. Second motor; 24. Second base plate; 25. Liquid filling port; 26. Second air inlet; 27. Second air outlet; 28. Impeller; 29. ​​Exhaust port; 30. Intake port; 31. Discharge port; 32. Pump cover; 33. Delivery pipe. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1-3As shown, a hybrid vacuum pump structure provided by an embodiment of the utility model includes a primary pump 1, a secondary pump 2 and a water vapor separator 3, the secondary pump 2 is arranged on one side of the primary pump 1, the water vapor separator 3 is arranged on one side of the secondary pump 2, the primary pump 1 includes a first motor 5 and a primary pump body 7, the first motor 5 is arranged on one side of the primary pump body 7, the secondary pump 2 includes a secondary pump body 22 and a second motor 23, the second motor 23 is arranged on one side of the secondary pump body 22, the input end of the secondary pump body 22 is connected to the output end of the primary pump body 7, the output end of the secondary pump body 22 is connected to the input end of the water vapor separator 3, an oil chamber 14 and a pump cavity 15 are arranged in the primary pump body 7, the oil chamber 14 is located on the upper side of the pump cavity 15, a rotor 16 is eccentrically installed in the pump cavity 15, one end of the rotor 16 is fixedly connected to the output end of the first motor 5, rotor grooves 17 are provided on both sides of the rotor 16, and a Two rotors 18, a spring 19 is fixedly installed between the two rotors 18, a first air inlet 9 and a first air outlet 13 are arranged on the upper side of the primary pump body 7, the first air inlet 9 is connected to the pump chamber 15, the first air outlet 13 is connected to the oil chamber 14, an exhaust hole is opened between the oil chamber 14 and the pump chamber 15, an exhaust valve 20 is fixedly installed on the upper side of the exhaust hole, the exhaust valve 20 corresponds to the first air outlet 13, a pump cover 32 is fixedly installed on one side of the secondary pump body 22, a second air inlet 26 and a second air outlet 27 are arranged on the upper side of the pump cover 32, an exhaust port 29 and an air intake port 30 are opened on one side of the pump cover 32, an impeller 28 is eccentrically installed between the inner walls of the secondary pump body 22, the impeller 28 corresponds to the second air inlet 26 and the second air outlet 27, one end of the impeller 28 is fixedly connected to the second motor 23, and a diffuser pipe 21 is fixedly installed between the second air inlet 26 and the first air outlet 13.

[0022] Specifically, in the present embodiment, the diffuser 21 can reduce the pressure of the gas discharged from the primary pump 1 to the secondary pump 2. By setting the exhaust valve 20 in the oil chamber 14 and immersing the exhaust valve 20 in oil, the gas can be prevented from flowing back into the pump. At the same time, in order to prevent the vacuum pump oil from flowing back into the vacuum container due to a sudden power outage, an electromagnetic valve can be installed on the first air inlet 9. Once the power is off, the electromagnetic valve blocks the first air inlet 9. When the power is on again, the electromagnetic valve is sucked up, so that the first air inlet 9 is opened.

[0023] The utility model provides a hybrid vacuum pump structure, wherein an oil filling port 11 is provided on the upper side of an oil chamber 14, an oil drain port 10 is provided on one side of the oil chamber 14, an oil level display 12 is provided on one side of the oil chamber 14, a delivery pipe 33 is fixedly installed between the second air outlet 27 and the input end of a water vapor separator 3, a discharge port 31 is provided on the upper side of the water vapor separator 3, a first base plate 4 is fixedly installed on the lower side of a primary pump body 7 and a first motor 5, and a second base plate 24 is fixedly installed between a secondary pump body 22 and the second motor 23.

[0024] In another embodiment of the present invention, the oil filling port 11 and the oil level display 12 are provided so that the staff can check the oil volume in the oil chamber 14 , and the staff can add oil through the oil filling port 11 .

[0025] Working principle: through the first-stage pump 1 and the second-stage pump 2, the two rotors 18 divide the crescent-shaped space surrounded by the rotor 16 and the pump chamber 15 into three parts A, B, and C. By starting the first motor 5 to drive the rotor 16 to rotate, the volume of the space A connected to the first air inlet 9 gradually increases, and the suction process is carried out. The volume of the space C connected to the first air outlet 13 will gradually decrease, and it is in the exhaust process, and the volume of the space B in the middle will also gradually decrease, and it will be in the compression process. As the volume of space A gradually increases and the gas pressure decreases, the external gas pressure at the entrance of the first air inlet 9 is greater than the pressure in space A, so the gas is sucked in. At this time, the volume of space B is gradually reduced, so the gas sucked in the previous cycle will be compressed. When the gas pressure is high enough and greater than the sum of the gravity of the oil in the oil chamber 14 and the elastic force of the exhaust valve 20, the pumped gas will push open the exhaust valve 20, pass through the oil layer and be discharged from the first air outlet 13, and then the gas enters the diffuser 21, and then the second motor is started. The impeller 28 is driven to rotate by the impeller 23, and water of a certain height is injected into the secondary pump body 22 through the liquid filling port 25 as the working fluid. When the impeller rotates, the water is subjected to the centrifugal force to form a rotating closed water ring on the inner wall of the secondary pump body 22. The upper inner surface of the water ring is tangent to the hub of the impeller 28, and the lower inner surface of the water ring is just in contact with the top of the blades of the impeller 28. At this time, a crescent-shaped space is formed between the hub of the impeller 28 and the water ring, and this space is divided into a number of equal small cavities by the number of blades of the impeller 28. When the impeller 28 Assuming that the upper 0° of the impeller 28 is the starting point, the volume of the small cavity will change from small to large when the impeller 28 rotates 180° before, and it will be connected to the suction port 30 on the pump cover 32. As the gas pressure in the space decreases, the gas in the diffuser 21 will be sucked in. When the suction ends, the small cavity is isolated from the suction port 30. When the impeller rotates from 180° to 360°, the inner surface of the water ring gradually approaches the hub of the impeller 28, causing the small cavity to change from large to small, and the gas pressure in its space increases. When it is higher than the exhaust port pressure, and the small cavity is connected to the exhaust port, the pressure of the gas in the small cavity increases. When the two ports are connected, the gas will be discharged and work continuously through several small cavities, and so on. The secondary pump body 22 will continuously suck or pressurize the gas, and then the discharged gas will contain a part of the working fluid, and then enter the water vapor separator 3 through the delivery pipe 33. The gas containing the working fluid will be separated by the water vapor separator 3, and the gas will be discharged through the exhaust port 31, and the working fluid will remain in the water vapor separator 3. By adding cold water to the water vapor separator 3, the temperature of the working fluid can be reduced, so that the working fluid can be reused.

[0026] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hybrid vacuum pump structure, comprising a primary pump (1), a secondary pump (2) and a water vapor separator (3), characterized in that: The secondary pump (2) is arranged on one side of the primary pump (1), and the water vapor separator (3) is arranged on one side of the secondary pump (2). The primary pump (1) comprises a first motor (5) and a primary pump body (7), and the first motor (5) is arranged on one side of the primary pump body (7). The secondary pump (2) comprises a secondary pump body (22) and a second motor (23), and the second motor (23) is arranged on one side of the secondary pump body (22). The input end of the secondary pump body (22) is connected to the output end of the primary pump body (7), and the output end of the secondary pump body (22) is connected to the input end of the water vapor separator (3).

2. A hybrid vacuum pump structure according to claim 1, characterized in that: An oil chamber (14) and a pump chamber (15) are provided in the primary pump body (7). The oil chamber (14) is located on the upper side of the pump chamber (15). A rotor (16) is eccentrically rotatably installed in the pump chamber (15). One end of the rotor (16) is fixedly connected to the output end of the first motor (5). Rotor slots (17) are provided on both sides of the rotor (16). Two rotor vanes (18) are slidably installed in the rotor slots (17). A fixedly mounted rotor vane (18) is provided between the two rotor vanes (18). A spring (19) is installed, and a first air inlet (9) and a first air outlet (13) are arranged on the upper side of the primary pump body (7); the first air inlet (9) is connected to the pump chamber (15), and the first air outlet (13) is connected to the oil chamber (14); an exhaust hole is opened between the oil chamber (14) and the pump chamber (15); an exhaust valve (20) is fixedly installed on the upper side of the exhaust hole, and the exhaust valve (20) corresponds to the first air outlet (13).

3. A hybrid vacuum pump structure according to claim 2, characterized in that: A pump cover (32) is fixedly mounted on one side of the secondary pump body (22), a second air inlet (26) and a second air outlet (27) are arranged on the upper side of the pump cover (32), an exhaust port (29) and an air intake port (30) are opened on one side of the pump cover (32), an impeller (28) is eccentrically mounted between the inner walls of the secondary pump body (22), the impeller (28) corresponds to the second air inlet (26) and the second air outlet (27), one end of the impeller (28) is fixedly connected to the second motor (23), and a diffuser pipe (21) is fixedly mounted between the second air inlet (26) and the first air outlet (13).

4. A hybrid vacuum pump structure according to claim 2, characterized in that: The oil chamber (14) is provided with a refueling port (11) on the upper side, an oil drain port (10) is provided on one side of the oil chamber (14), and an oil level display (12) is provided on one side of the oil chamber (14).

5. A hybrid vacuum pump structure according to claim 3, characterized in that: A delivery pipe (33) is fixedly installed between the second air outlet (27) and the input end of the water vapor separator (3), and an exhaust port (31) is arranged on the upper side of the water vapor separator (3).

6. A hybrid vacuum pump structure according to claim 1, characterized in that: A first base plate (4) is fixedly mounted on the lower side of the primary pump body (7) and the first motor (5), and a second base plate (24) is fixedly mounted between the secondary pump body (22) and the second motor (23).

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