Vacuum pump refrigerating device

Abstract

The utility model belongs to the technical field of vacuum pump refrigeration, and provides a vacuum pump refrigeration device which comprises a vacuum pump host and an end cover, an exhaust filter cavity is fixed at the rear end of the vacuum pump host, a filter element and a small oil tank are mounted at the upper end and the lower end in the exhaust filter cavity respectively, and the vacuum pump host is communicated with the small oil tank; the two cold water inlet and outlet ports enable cold water to circularly flow in the heat dissipation guide pipe in a one-in and one-out mode, heat of lubricating oil is taken away by means of fluidity of the cold water in the heat dissipation guide pipe, the oil temperature can be rapidly and effectively reduced through cold water circulation, the lubricating oil is cooled in the large oil tank, and the refrigeration effect and the heat dissipation capacity of the vacuum pump main machine are improved. A plurality of fine holes formed in the outer surface of the filter can ensure that crude oil of lubricating oil enters the main machine of the vacuum pump along the oil suction pipe on the premise of filtering oxide impurities, faults caused by too high temperature are avoided, and the problems that an existing vacuum pump is too fast in temperature heating, pump oil is prone to high-temperature deterioration and becomes thick, and the service life is shortened are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum pump refrigeration and provides a vacuum pump refrigeration device. Background Art

[0002] A 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 a vacuum in a closed space. The mechanical components of the vacuum pump (such as bearings, screws, holes, cavities, grooves and other structures) need to be lubricated and sealed with lubricating oil. At the same time, the lubricating oil can also prevent rust on the mechanical components, reduce wear and vibration, and improve assembly performance. The vacuum pump will generate heat when working, and a refrigeration device is required to dissipate heat and cool the vacuum pump. The refrigeration device usually uses lubricating oil as an oil-cooling medium to dissipate heat and cool the vacuum pump. On the basis of oil cooling, other heat dissipation and cooling refrigeration technical measures are combined to enhance the cooling effect of the vacuum pump to maintain the temperature of the vacuum pump within the normal working range.

[0003] The lubricating oil is exposed to high temperature inside the vacuum pump for a long time. The high temperature causes the lubricating oil to oxidize and deteriorate inside the vacuum pump to form oxide impurities that are insoluble in the lubricating oil crude oil. The density of the oxide impurities is much higher than the density of the lubricating oil crude oil. The oxide impurities are insoluble in the lubricating oil crude oil. The oxide impurities diffuse in the lubricating oil crude oil as the lubricating oil crude oil flows. The oxide impurities gradually accumulate and increase in the lubricating oil crude oil. The oxide impurities emulsify the lubricating oil, making the lubricating oil viscous. The viscosity of the lubricating oil increases, which reduces the fluidity of the lubricating oil. The oxide impurities will adhere to and clog the mechanical components inside the vacuum pump as the lubricating oil flows. In this case, once the vacuum pump is shut down, the lubricating oil will no longer flow, and the oxide impurities will precipitate inside the lubricating oil crude oil and cause the lubricating oil to stratify. The lubricating oil is completely condensed into a paste-like semi-solid or solid state. When the vacuum pump is started again, the lubricating oil can no longer flow, resulting in lubricating oil failure, reducing the heat dissipation and cooling effect of the vacuum pump, and finally accelerating the damage to the vacuum pump, forming a vicious cycle. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and solve the problems of the existing vacuum pump heating up too quickly, the pump oil easily deteriorating at high temperature and becoming viscous, and reducing the service life.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a vacuum pump refrigeration device, including a vacuum pump main unit and an end cover:

[0006] An exhaust filter cavity is fixed to the rear end of the vacuum pump main unit, and a filter element and a small oil tank are installed at the upper and lower ends of the exhaust filter cavity respectively, and the vacuum pump main unit and the small oil tank are connected;

[0007] A large oil tank is installed at the front lower end of the vacuum pump main unit, a heat dissipation pipe is inserted into the bottom end of the large oil tank, a pair of cold water inlet and outlet ports are provided inside the heat dissipation pipe, the left and right ends of the heat dissipation pipe are respectively detachably connected to the inner ends of the adjacent end covers, and a filter is detachably connected to the top end of the large oil tank and communicates with the inside of the oil suction pipe;

[0008] The left and right sides between the large oil tank and the small oil tank are respectively connected by flanges with an oil drain pipe and a constant pressure pipe passing through the lower end of the exhaust filter cavity, and the large oil tank and the vacuum pump main unit are connected by a flange with an oil suction pipe.

[0009] In a preferred technical solution of the present invention, a connector is detachably connected between the filter element and the small oil tank, and the filter element and the small oil tank are connected to each other through the connector.

[0010] In a preferred technical solution of the present invention, an oil mirror is installed on the upper part of the end cover, and the oil mirror is located on the left and right sides above the heat dissipation pipe, and the cold water inlet and outlet ports are located below the oil mirror.

[0011] In a preferred technical solution of the present invention, both left and right ends of the large oil tank are detachably connected with end covers, and the outer end of the cold water inlet and outlet port passes through the outer end of an adjacent end cover.

[0012] In a preferred technical solution of the present invention, a bracket is installed at the lower end of the vacuum pump main unit, and the large oil tank is fixed at the front end of the bracket.

[0013] In a preferred technical solution of the present invention, a plurality of pores are formed on the outer surface of the filter.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The lubricating oil flows inside the vacuum pump main unit and flows into the small oil tank. The filter element is connected to the upper end of the small oil tank by a connector. The connector allows the filter element to communicate with the inside of the small oil tank. The filter element and the small oil tank are connected to each other through a detachable connector, which can effectively filter the oil in the vacuum pump main unit. The filter element filters the lubricating oil inside the small oil tank and absorbs oxides and other pollutants, reducing the pollution of the lubricating oil by oxide impurities and keeping the lubricating oil clean.

[0016] The bracket installed at the lower end of the vacuum pump main unit allows the large oil tank to be stably installed at the front end of the bracket to optimize the overall installation and layout of the device. The small oil tank flows the lubricating oil from the small oil tank into the large oil tank through the oil drain pipe. The constant pressure pipe is used to balance the oil pressure and air pressure inside the large and small oil tanks. The connection method is reliable and easy to install and disassemble, which facilitates maintenance and repair of the equipment.

[0017] The cold water inlet and outlet ports are located below the oil mirror, which can make the layout of the large oil tank reasonable for connecting to an external cooling water source. The outer end of the cold water inlet and outlet ports passes outward from the outer end of an adjacent end cover for easy connection to an external chiller. A pair of cold water inlet and outlet ports are arranged at one end of the outer surface of the heat dissipation duct. The external chiller can provide cooling medium for the interior of the large oil tank. The chiller enters the heat dissipation duct along the cold water inlet and outlet ports to absorb the heat of the lubricating oil inside the large oil tank. The heat of the lubricating oil is transferred to the cold water along the wall of the heat dissipation duct. The two cold water inlet and outlet ports make the cold water circulate "in and out" inside the heat dissipation duct, relying on the fluidity of the cold water inside the heat dissipation duct to take away the heat of the lubricating oil. The oil temperature can be quickly and effectively reduced through the cold water circulation, and the lubricating oil is cooled inside the large oil tank, thereby improving the cooling effect and heat dissipation capacity of the vacuum pump host, and ensuring that the vacuum pump host will not malfunction due to excessive temperature during long-term operation.

[0018] Oil sight glasses located on both sides of the cooling duct allow operators to observe the oil status and heat dissipation at any time, allowing them to identify and address any problems promptly. Removing the end caps on both ends of the large fuel tank allows for easy access to the cooling duct, filter, and other components inside the tank for maintenance, cleaning, and replacement.

[0019] The filter set at the top of the large oil tank is connected to the inside of the oil suction pipe, which makes it convenient for the vacuum pump host to absorb lubricating oil from the inside of the large oil tank through the oil suction pipe. The multiple fine holes opened on the outer surface of the filter can ensure that the lubricating oil crude oil flows into the interior of the vacuum pump host along the oil suction pipe while filtering out oxide impurities, thereby improving the cleanliness of the oil and allowing the vacuum pump host to obtain clean lubricating oil. The oil suction pipe makes it convenient for the lubricating oil inside the large oil tank to be recycled and reused by the vacuum pump host. The oil suction pipe realizes the effect of recycling lubricating oil for the vacuum pump host, thereby ensuring the normal operation and stable performance of the vacuum pump host, making the product more durable and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a left view of the overall structure of the utility model;

[0021] Figure 2 This is a right side view of the overall structure of the utility model;

[0022] Figure 3 This is a bottom view of the overall structure of the utility model;

[0023] Figure 4 This is a cross-sectional view of the internal structure of the exhaust filter cavity of the present utility model;

[0024] Figure 5 This is a cross-sectional view of the internal structure of the large fuel tank of the present utility model.

[0025] In the figure: 1. Exhaust filter chamber; 2. Vacuum pump main unit; 3. Large oil tank; 4. Bracket; 5. Oil drain pipe; 6. Oil suction pipe; 7. Constant pressure pipe; 8. End cover; 9. Oil mirror; 10. Cold water inlet and outlet ports; 11. Heat dissipation duct; 12. Filter; 13. Filter element; 14. Small oil tank; 15. Connector. DETAILED DESCRIPTION

[0026] For example 1, please refer to Figure 1-5 The utility model provides a technical solution: a vacuum pump refrigeration device, including a vacuum pump main unit 2 and an end cover 8: an exhaust filter cavity 1 is fixed to the rear end of the vacuum pump main unit 2, and a filter element 13 and a small oil tank 14 are installed at the upper and lower ends of the exhaust filter cavity 1, respectively, and the vacuum pump main unit 2 and the small oil tank 14 are connected; a large oil tank 3 is installed at the front lower end of the vacuum pump main unit 2, and a heat dissipation pipe 11 is inserted into the bottom end of the large oil tank 3, and a pair of cold water inlet and outlet ports 10 are provided inside the heat dissipation pipe 11, and the left and right ends of the heat dissipation pipe 11 are connected. They are respectively detachably connected to the inner ends of the adjacent end covers 8, and the top of the large oil tank 3 is detachably connected to a filter 12 that passes through the inside of the oil suction pipe 6; the left and right sides between the large oil tank 3 and the small oil tank 14 are respectively flange-connected with an oil drain pipe 5 and a constant pressure pipe 7 that pass through the lower end of the exhaust filter cavity 1, and the large oil tank 3 is flange-connected to the vacuum pump main unit 2 with an oil suction pipe 6; there is a "channel" for the flow of lubricating oil between the vacuum pump main unit 2 and the exhaust filter cavity 1, and the interior of the small oil tank 14 is "empty" in the initial state. , the oil pressure inside the vacuum pump main unit 2 is higher than the oil inside the small oil tank 14. When the vacuum pump main unit 2 is working, the lubricating oil inside the vacuum pump main unit 2 flows along the "channel" to the inside of the exhaust filter cavity 1. The lubricating oil flowing inside the vacuum pump main unit 2 will flow into the inside of the small oil tank 14. A connector 15 is detachably connected between the filter element 13 and the small oil tank 14. The filter element 13 and the small oil tank 14 are connected to each other through the connector 15. The filter element 13 is connected to the upper end of the small oil tank 14 using the connector 15. The connector 15 makes the filter element 13 The filter element 13 is connected to the inside of the small oil tank 14. In the initial state, the filter element 13 is "empty". A higher oil pressure difference is generated inside the small oil tank 14 than inside the filter element 13. The lubricating oil will flow through the filter element 13 inside the small oil tank 14. The filter element 13 and the small oil tank 14 are connected to each other through a detachable connector 15, which can effectively filter the oil in the vacuum pump host 2. The filter element 13 filters the lubricating oil inside the small oil tank 14 and absorbs oxides and other pollutants, reducing the pollution of the lubricating oil by oxide impurities and keeping the lubricating oil clean.

[0027] Embodiment 2, further supplemented according to the above embodiment: a bracket 4 is installed at the lower end of the vacuum pump main body 2, and the large oil tank 3 is fixed at the front end of the bracket 4. The bracket 4 is installed at the lower end of the vacuum pump main body 2 so that the large oil tank 3 can be stably installed at the front end of the bracket 4, and the bracket 4 firmly installs the exhaust filter chamber 1 to the rear end of the vacuum pump main body 2. Since the large oil tank 3 is located in the front and lower part of the exhaust filter chamber 1, there is a height difference between the small oil tank 14 and the large oil tank 3, and the small oil tank 14 flows the lubricating oil from the small oil tank 14 into the inside of the large oil tank 3 through the oil drain pipe 5. The lubricating oil immerses the heat dissipation pipe 11 inside the large oil tank 3, and the constant pressure pipe 7 connects the large oil tank 3 and the small oil tank 14 to each other. The air flows between the large oil tank 3 and the small oil tank 14 through the constant pressure pipe 7. The constant pressure pipe 7 is used to balance the oil pressure and air pressure inside the large oil tank 3 and the small oil tank 14 to ensure that the lubricating oil can flow smoothly from the small oil tank 14 to the large oil tank 3.

[0028] Embodiment 3, further supplemented according to the above embodiment: both ends of the large oil tank 3 are detachably connected with end covers 8, the outer end of the cold water inlet and outlet port 10 passes outwardly from the outer end of an adjacent end cover 8, an oil mirror 9 is installed on the upper part of the end cover 8, the oil mirror 9 is located on the left and right sides above the heat dissipation pipe 11, the cold water inlet and outlet port 10 is located below the oil mirror 9, the cold water inlet and outlet port 10 is located below the oil mirror 9, which can make the layout of the large oil tank 3 reasonable for connecting to an external cooling water source, the outer end of the cold water inlet and outlet port 10 passes outwardly from the outer end of an adjacent end cover 8 for connection to an external chiller, the two cold water inlet and outlet ports 10 are simultaneously connected to the inside of the heat dissipation pipe 11, one of the cold water inlet and outlet ports 10 is connected to the cold water output end of the chiller through a pipe, and the other cold water inlet and outlet port 10 is connected to the cold water input end of the chiller through a pipe, and the cold water enters the heat dissipation pipe 11 from one of the cold water inlet and outlet ports 10, and the cold water enters the inside of the heat dissipation pipe 11, Water flows out of the heat dissipation pipe 11 from another cold water inlet and outlet port 10, so that the cold water flows from the chiller into the inside of the heat dissipation pipe 11 and then flows out of the heat dissipation pipe 11. A pair of cold water inlet and outlet ports 10 are set at one end of the outer surface of the heat dissipation pipe 11. The external chiller can provide cooling medium for the inside of the large oil tank 3. The cold water in the heat dissipation pipe 11 forms a temperature difference on the wall of the heat dissipation pipe 11 lower than that inside the large oil tank 3. The heat of the lubricating oil is transferred to the cold water along the wall of the heat dissipation pipe 11. The two cold water inlet and outlet ports 10 allow the cold water to circulate "in and out" inside the heat dissipation pipe 11, relying on the fluidity of the cold water inside the heat dissipation pipe 11 to take away the heat of the lubricating oil, and relying on the chiller to enter the heat dissipation pipe 11 along the cold water inlet and outlet ports 10 to absorb the heat of the lubricating oil inside the large oil tank 3. The cold water circulation can quickly and effectively reduce the oil temperature, so that the lubricating oil inside the large oil tank 3 is cooled.

[0029] Embodiment 4, further supplemented according to the above embodiment: the filter 12 arranged at the top end of the large oil tank 3 is connected to the inside of the oil suction pipe 6, so that the vacuum pump main unit 2 can absorb lubricating oil from the inside of the large oil tank 3 through the oil suction pipe 6, and a plurality of fine holes are provided on the outer surface of the filter 12. The plurality of fine holes provided on the outer surface of the filter 12 can ensure that the lubricating oil crude oil flows into the interior of the vacuum pump main unit 2 along the oil suction pipe 6 under the premise of filtering oxide impurities, thereby improving the cleanliness of the oil and allowing the vacuum pump main unit 2 to obtain clean and cooled lubricating oil. The oil suction pipe 6 facilitates the lubricating oil inside the large oil tank 3 to be recycled and reused by the vacuum pump main unit 2. The oil suction pipe 6 realizes the effect of recycling lubricating oil by the vacuum pump main unit 2, improves the cooling effect and heat dissipation capacity of the vacuum pump main unit 2, ensures that the vacuum pump main unit 2 will not malfunction due to excessive temperature during long-term operation, and ensures the normal operation and stable performance of the vacuum pump main unit 2.

[0030] Embodiment 5 is further supplemented based on the above embodiment: the oil mirror 9 is located on the left and right sides above the heat dissipation pipe 11 to facilitate the operator to observe the state of the oil and the heat dissipation at any time, to promptly discover problems and deal with them, and the end covers 8 on the left and right ends of the large oil tank 3 are removed to facilitate the maintenance, cleaning and replacement of the heat dissipation pipe 11, filter 12 and other components inside the large oil tank 3, so as to optimize the overall installation and layout of the device. The connection method is reliable, easy to install and disassemble, and convenient for maintenance and repair of the equipment, making the product more durable and practical.

Claims

1. A vacuum pump refrigeration device, comprising a vacuum pump main unit (2) and an end cover (8), characterized in that: An exhaust filter cavity (1) is fixed to the rear end of the vacuum pump main unit (2), a filter element (13) and a small oil tank (14) are installed at the upper and lower ends of the exhaust filter cavity (1), and the vacuum pump main unit (2) and the small oil tank (14) are connected; A large oil tank (3) is installed at the front lower end of the vacuum pump main unit (2), a heat dissipation pipe (11) is inserted into the bottom end of the large oil tank (3), a pair of cold water inlet and outlet ports (10) are provided inside the heat dissipation pipe (11), the left and right ends of the heat dissipation pipe (11) are respectively connected to the inner ends of the adjacent end covers (8) through detachable connection, and a filter (12) that is connected to the inside of the oil suction pipe (6) is detachably connected to the top end of the large oil tank (3); An oil drain pipe (5) and a constant pressure pipe (7) passing through the lower end of the exhaust filter cavity (1) are respectively connected to the left and right sides of the large oil tank (3) and the small oil tank (14) via flanges, and an oil suction pipe (6) is connected to the large oil tank (3) and the vacuum pump main unit (2) via flanges.

2. A vacuum pump refrigeration device according to claim 1, characterized in that: A connector (15) is detachably connected between the filter element (13) and the small oil tank (14), and the filter element (13) and the small oil tank (14) are interconnected via the connector (15).

3. A vacuum pump refrigeration device according to claim 1, characterized in that: An oil mirror (9) is installed on the upper portion of the end cover (8), and the oil mirror (9) is located on the left and right sides above the heat dissipation pipe (11), and the cold water inlet and outlet port (10) is located below the oil mirror (9).

4. A vacuum pump refrigeration device according to claim 1, characterized in that: The left and right ends of the large oil tank (3) are both detachably connected with end covers (8), and the outer end of the cold water inlet and outlet port (10) extends outwardly through the outer end of an adjacent end cover (8).

5. The vacuum pump refrigeration device according to claim 1, characterized in that: A bracket (4) is installed at the lower end of the vacuum pump main unit (2), and the large oil tank (3) is fixed to the front end of the bracket (4).

6. A vacuum pump refrigeration device according to claim 1, characterized in that: The outer surface of the filter (12) is provided with a plurality of pores.

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