Cooling device for oil seal type mechanical pump

Abstract

The cooling device for the oil seal type mechanical pump comprises an oil liquid pipeline and a liquid cooling pipeline, and the oil liquid pipeline is configured to guide pump oil in an oil tank into a pump body; the liquid cooling pipeline is configured to allow cooling liquid to circulate and is used for cooling pump oil in the oil liquid pipeline; wherein a supporting column is arranged in the oil liquid pipeline, the liquid cooling pipeline comprises a first cooling pipe, and the first cooling pipe is spirally arranged around the supporting column, so that the volume of the first cooling pipe in the oil liquid pipeline is increased, the flowing time of cooling liquid in the oil liquid pipeline is prolonged, and the cooling effect of the cooling liquid on pump oil in the oil liquid pipeline is improved; therefore, the pump oil temperature can be quickly reduced to a proper temperature, and the influence of high-temperature pump oil on the pump body is avoided. The water cooling technology is adopted, pump oil can be rapidly cooled, the temperature of the pump oil can be rapidly reduced to the proper temperature, and accuracy is improved.

Description

Technical Field

[0001] This application relates to the field of vacuum pump technology, specifically to a cooling device for an oil-sealed mechanical pump. Background Technology

[0002] Oil-sealed mechanical pumps require vacuum pump oil for lubrication and heat dissipation during operation. The pump oil circulates between the pump body and the oil tank. As the pump body compresses and performs work, the temperature of the pump oil rises when it is discharged from the pump body into the oil tank. If the pump oil temperature continues to rise, the pump will operate under high temperature conditions for a long time, which will reduce the pump's performance and lifespan.

[0003] In the prior art, a cooling device is installed to cool the pump oil, thereby reducing the temperature of the pump oil circulating into the pump body and preventing high-temperature damage to the pump body.

[0004] However, most existing cooling devices use air cooling technology to cool the pump oil. Air cooling efficiency is low, and air cooling is affected by environmental factors, making it impossible to quickly and accurately reduce the temperature of the pump oil, thus failing to quickly lower the pump oil to the appropriate temperature and meet the usage requirements.

[0005] Therefore, there is room for further improvement in the oil cooling device of the existing oil-sealed mechanical pump. Utility Model Content

[0006] In view of this, and addressing the technical problem that existing pump oil cooling devices are greatly affected by environmental factors and cannot quickly reduce the pump oil temperature to an appropriate temperature, this application provides a cooling device for an oil-sealed mechanical pump, which uses water cooling technology to cool the pump oil, enabling the pump oil temperature to be quickly reduced to an appropriate temperature and improving accuracy.

[0007] This application provides a cooling device for an oil-sealed mechanical pump, comprising:

[0008] Oil pipeline, configured to guide pump oil from the oil tank to the pump body;

[0009] Liquid cooling pipes are configured to supply cooling liquid for cooling the pump oil in the oil pipeline;

[0010] The oil pipeline is equipped with a support column, and the liquid cooling pipeline includes a first cooling pipe, which is spirally arranged around the support column.

[0011] Compared with the prior art, the cooling device for the oil-sealed mechanical pump of this application includes an oil pipeline and a cooling pipeline. The oil pipeline can guide the oil in the oil tank to the pump body. The cooling pipeline provides cooling liquid for circulation and includes a first cooling pipe. A support column is provided inside the oil pipeline. The first cooling pipe is spirally wound around the support column, thereby increasing the volume of the first cooling pipe in the oil pipeline, thereby increasing the flow time of the cooling liquid in the oil pipeline, and increasing the cooling effect of the cooling liquid on the pump oil in the oil pipeline. This allows the pump oil temperature to be quickly reduced to an appropriate temperature, avoiding the impact of high-temperature pump oil on the pump body.

[0012] Preferably, the liquid cooling pipe further includes a second cooling pipe, which is sleeved outside the oil pipe;

[0013] The second cooling pipe is provided with an inlet and an outlet, which are spaced apart along the axial direction.

[0014] In this embodiment, a second cooling pipe is provided outside the oil pipeline. The second cooling pipe is used to supply cooling liquid. The cooling liquid in the second cooling pipe can directly contact the outer wall of the oil pipeline, thereby exchanging heat with the oil pipeline and indirectly cooling the pump oil in the oil pipeline, thus improving the cooling efficiency of the pump oil.

[0015] Preferably, the first cooling pipe is arranged in a two-layer spiral structure;

[0016] The inlet and outlet are located on the side wall of the second cooling pipe, and the projections of the axis of the inlet and the axis of the outlet on the same plane do not overlap.

[0017] In this embodiment, the first cooling pipe has a two-layer spiral structure, which can further increase the flow time of the cooling liquid in the oil pipe, increase the coverage area of ​​the first cooling liquid, and improve the cooling effect on the pump oil; while the projections of the axis of the inlet and the axis of the outlet on the same plane do not overlap, which can increase the flow path of the pump oil in the oil pipe, increase the contact time between the pump oil and the first cooling pipe, and improve the cooling effect.

[0018] Preferably, the oil pipeline includes a sealing plate and an oil cylinder, one end of the oil cylinder has an opening, and the sealing plate is used to seal the opening;

[0019] The first cooling pipe is installed inside the oil cylinder, and the inlet and outlet ends of the first cooling pipe are exposed outside the oil pipeline through the sealing plate.

[0020] In this embodiment, the inlet and outlet of the first cooling pipe are uniformly set at the open end of the oil cylinder and exposed to the outside of the oil pipeline, which facilitates the delivery of cooling liquid to the first cooling pipe by the operator. At the same time, setting the inlet and outlet on the same side can balance the temperature difference in the oil pipeline as much as possible, ensuring the cooling balance and efficiency of the pump oil.

[0021] Preferably, the axial length of the support column is less than the axial length of the oil cylinder, and the outer diameter of the support column is less than the inner diameter of the oil cylinder;

[0022] The distance between the inner wall of the oil cylinder and the outer wall of the support column is greater than the outer diameter of the first cooling pipe.

[0023] In this embodiment, the length of the support column is less than the length of the oil cylinder, which facilitates the placement of the first cooling pipe; and the distance between the inner wall of the oil cylinder and the outer wall of the support column is greater than the outer diameter of the first cooling pipe, so that the first cooling pipe can be inserted.

[0024] Preferably, the oil pipeline includes an oil inlet and an oil outlet, the oil outlet being used to connect to the pump body, and the oil inlet being used to connect to the oil tank;

[0025] The oil inlet and oil outlet are distributed at intervals along the axial direction.

[0026] In this embodiment, the oil inlet and outlet of the oil pipeline are spaced apart along the axial direction, which can increase the flow path of the pumped oil and increase the contact area between the pumped oil and the first cooling pipe.

[0027] Preferably, the oil inlet and oil outlet are located on the side wall of the oil pipeline;

[0028] The projections of the axis of the oil inlet and the axis of the oil outlet onto the same plane do not overlap.

[0029] In this embodiment, the oil inlet and outlet are located on the side wall of the oil pipeline. The axes of the oil inlet and outlet are perpendicular to the axis of the oil cylinder, and the projections of the axes of the oil inlet and outlet on the same plane do not overlap. This increases the flow path of the pumped oil in the oil cylinder, thereby increasing the contact area and time between the pumped oil and the first cooling pipe and improving the cooling efficiency.

[0030] Preferably, the axial length of the oil pipe is greater than the axial length of the second cooling pipe;

[0031] The projections of the axis of the oil inlet and the axis of the water inlet onto the same plane do not overlap, and the projections of the axis of the oil outlet and the axis of the water outlet onto the same plane do not overlap.

[0032] In this embodiment, the length of the second cooling pipe is less than the length of the oil pipe, thereby avoiding interference between the second cooling pipe and the oil inlet and outlet; and the oil inlet, water inlet, oil outlet, and water outlet are staggered from each other, which can reduce interference on the one hand and increase the flow path of the cooling liquid and pump oil on the other hand, thereby improving the cooling effect.

[0033] Preferably, the oil inlet is located close to the opening of the oil cylinder;

[0034] The water outlet is located near the oil inlet, and the water inlet is located near the oil outlet.

[0035] or,

[0036] The water outlet is located near the oil outlet, and the water inlet is located near the oil inlet.

[0037] In this embodiment, the oil inlet is positioned close to the opening of the oil cylinder, that is, the oil inlet is positioned close to the water inlet of the first cooling pipe, so that the higher temperature pump oil comes into contact with the lower temperature part of the first cooling pipe, thereby enabling the pump oil temperature to drop rapidly and improving the cooling efficiency.

[0038] Preferably, the oil cylinder opening end is provided with a connecting plate, and the connecting plate is sealed to the sealing plate;

[0039] The connecting plate has a sealing groove on the side facing the sealing plate, and a sealing ring is provided in the sealing groove;

[0040] The sealing plate is provided with an axially penetrating mounting hole, which is used to seal and install the first cooling pipe.

[0041] In this embodiment, a sealing groove is provided on the connecting plate, which can increase the sealing performance between the connecting plate and the sealing plate and prevent pump oil leakage. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the connection structure between the cooling device for an oil-sealed mechanical pump, the pump body, and the oil tank, according to an embodiment of this application.

[0043] Figure 2 This is an exploded structural diagram of a cooling device for an oil-sealed mechanical pump provided in an embodiment of this application;

[0044] Figure 3 This is a cross-sectional structural schematic diagram of a cooling device for an oil-sealed mechanical pump according to an embodiment of this application;

[0045] Figure 4 This is a cross-sectional structural schematic diagram of an oil pipeline provided in an embodiment of this application;

[0046] Figure 5This is a three-dimensional structural schematic diagram of a cooling device for an oil-sealed mechanical pump provided in an embodiment of this application;

[0047] Figure 6 This is a schematic cross-sectional view of a cooling device for an oil-sealed mechanical pump according to an embodiment of this application. Figure 2 .

[0048] Reference numerals: 1. Cooling device for oil-sealed mechanical pumps; 2. Pump body; 3. Oil tank;

[0049] 11. Oil pipe; 12. First cooling pipe; 13. Second cooling pipe;

[0050] 111. Oil inlet; 112. Oil outlet; 113. Oil cylinder; 114. Sealing plate; 115. Connecting plate; 116. Sealing groove; 117. Support column;

[0051] 121. Water inlet; 122. Water outlet;

[0052] 131. Inlet; 132. Outlet. Detailed Implementation

[0053] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0054] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0055] Those skilled in the art should understand that in the disclosure of this application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0056] The present application will now be described in further detail with reference to the accompanying drawings, see below. Figures 1 to 6 illustrate.

[0057] Example 1

[0058] This application provides a cooling device for an oil-sealed mechanical pump (hereinafter referred to as cooling device 1), which is used to cool the circulating pump oil in the oil-sealed mechanical pump. This allows the pump oil in the oil tank 3 to be cooled before entering the pump body 2, thus preventing the pump oil temperature in the pump body 2 from becoming too high and preventing the pump body 2 from operating at high temperatures. This can effectively extend the service life of the oil-sealed mechanical pump.

[0059] Among them, such as Figure 1 As shown, the cooling device 1 is externally located between the pump body 2 and the oil tank 3, facilitating disassembly and maintenance, reducing the impact of the environment of the pump body 2 or the oil tank 3 on the cooling device 1, improving cooling efficiency and accuracy. Furthermore, cooling the oil in the oil tank 3 before it enters the pump body 2 allows the filter components within the oil tank 3 to filter the pump oil before cooling, preventing impurities carried out by the pump body 2 after using the pump oil from affecting the cooling device 1.

[0060] In this application, the cooling device 1 includes an oil pipe 11 and a liquid cooling pipe. The oil pipe 11 supplies pump oil, with one end connected to the oil tank 3 and the other end connected to the pump body 2, so that the pump oil in the oil tank 3 can be cooled by the cooling device 1 and then flow into the pump body 2. The cooling pipe supplies cooling liquid, which can exchange heat with the pump oil to reduce the pump oil temperature. In this application, liquid cooling is used, which is more stable and can effectively reduce the influence of the external environment on the cooling liquid, quickly and stably cool the pump oil, and improve the accuracy of reducing the pump oil temperature, so that the pump oil temperature can be quickly reduced to an appropriate temperature.

[0061] Specifically, such as Figures 2 to 4 As shown, the oil pipeline 11 has a cylindrical structure, allowing pumped oil to enter. The oil pipeline 11 includes a sealing plate 114 and an oil cylinder 113. The oil cylinder 113 has a cylindrical structure, and one end of the oil cylinder 113 has an opening along its axial direction. The sealing plate 114 is used to seal the opening. The opening end of the oil cylinder 113 has an outwardly extending connecting plate 115, which provides a connection point for the sealing plate 114. The connecting plate 115 and the sealing plate 114 are connected by bolts, so that the sealing plate 114 can be connected to the connecting plate 115. This avoids the connecting bolts from contacting the pumped oil, thereby sealing the opening of the oil cylinder 113 with the sealing plate 114 and preventing pumped oil from leaking out of the opening.

[0062] like Figure 4As shown, the connecting plate 115 has a sealing groove 116 on its side facing the sealing plate 114. The sealing groove 116 is recessed in the direction away from the sealing plate 114 and has an annular structure. The sealing groove 116 is concentrically arranged with the opening of the oil cylinder 113, and the inner diameter of the sealing groove 116 is larger than the opening diameter. The sealing groove 116 is used to accommodate the sealing ring to enhance the sealing effect between the sealing plate 114 and the connecting plate 115. Furthermore, no connecting holes are provided inside the inner ring of the sealing groove 116, that is, no bolts or other connecting parts are provided inside the sealing ring, to avoid contact between the pump oil and bolts or other connecting parts and reduce the impact of impurities on the pump oil.

[0063] like Figure 2 As shown, the sealing plate 114 is provided with two mounting holes for installing the first cooling pipe 12. The two mounting holes are spaced apart and respectively accommodate the water inlet 121 and the water outlet 122 of the first cooling pipe 12. The water inlet 121 and the water outlet 122 of the first cooling pipe 12 pass through the two mounting holes and are exposed to the outside of the sealing plate 114. The water inlet 121 and the water outlet 122 of the first cooling pipe 12 are uniformly set at the open end of the oil cylinder 113 and exposed to the outside of the oil pipeline 11, which facilitates the delivery of cooling liquid to the first cooling pipe 12 by the operator. At the same time, the water inlet 121 and the water outlet 122 are spaced apart on the same side to balance the temperature difference in the oil pipeline 11 as much as possible, ensuring the cooling balance and efficiency of the pump oil. In addition, the mounting holes seal the first cooling pipe 12 to prevent the pump oil in the oil cylinder 113 from leaking out from the mounting holes.

[0064] like Figures 2 to 4 As shown, the oil pipeline 11 also includes a support column 117. The support column 117 is a hollow columnar structure and is disposed inside the oil cylinder 113. The axis of the support column 117 is on the same straight line as the axis of the oil cylinder 113. The end of the support column 117 away from the opening of the oil cylinder 113 is connected to the oil cylinder 113. The first cooling pipe 12 is spirally wound around the support column 117 to provide support for the first cooling pipe 12, so that the first cooling pipe 12 can be stably disposed inside the oil cylinder 113. On the one hand, the support column 117 can provide stable support for the first cooling pipe 12. On the other hand, the support column 117 is connected to the oil cylinder 113. When the first cooling pipe 12 is wound around the support column 117, it can cool the support column 117. The support column 117 can generate heat exchange with the oil cylinder 113, thereby accelerating the cooling of the pump oil in the oil cylinder 113 and improving the cooling efficiency of the pump oil.

[0065] Among them, such as Figure 3 , Figure 4 , Figure 6As shown, the outer diameter of the support column 117 is smaller than the inner diameter of the oil cylinder 113, and the distance between the inner wall of the oil cylinder 113 and the outer wall of the support column 117 is greater than the outer diameter of the first cooling pipe 12, so that the space between the support column 117 and the oil cylinder 113 can accommodate the first cooling pipe 12. In this embodiment, the distance between the outer wall of the support column 117 and the inner wall of the oil cylinder 113 is greater than twice the outer diameter of the first cooling pipe 12, so that the first cooling pipe 12 can be coiled around the support column 117 in a two-layer spiral structure inside the oil cylinder 113, and the two spiral parts are coaxially arranged. The spiral part of the first cooling pipe 12 can further increase the flow time of the cooling liquid in the oil pipe 11, increase the laying area of ​​the first cooling liquid, and improve the cooling effect on the pump oil.

[0066] Of course, in actual use, the outer diameter of the first cooling pipe 12 can be adjusted according to specific needs so that the first cooling pipe 12 can be spirally wound on the support column 117 in multiple layers.

[0067] In addition, the length of the support column 117 is less than the length of the oil cylinder 113, so as to provide support for the first cooling pipe 12 and also provide additional installation space for the first cooling pipe 12, which facilitates the installation of the first cooling pipe 12 in the oil cylinder 113.

[0068] It should be noted that, as Figure 3 As shown, the length of the spiral portion of the first cooling pipe 12 is the same as the length of the support column 117, so as to support the spiral portion of the first cooling pipe 12.

[0069] like Figures 2 to 4 As shown, the oil cylinder 113 includes an oil chamber, an oil inlet 111, and an oil outlet 112. The oil chamber has a cylindrical structure, with the support column 117 and the first cooling pipe 12 located inside the oil chamber, which provides space for pump oil. The oil inlet 111 and the oil outlet 112 are axially spaced at opposite ends of the oil cylinder 113. The oil inlet 111 is used to connect the oil chamber to the oil tank 3, and the oil outlet 112 is used to connect the oil chamber to the pump body 2. That is, the pump oil in the oil tank 3 can flow into the oil cylinder 113 through the oil inlet 111. After cooling, it flows into the pump body 2 from the oil outlet 112, so that the pump body 2 can use the cooled pump oil. The pump oil used by the pump body 2 flows into the oil tank 3, and the pump oil in the oil tank 3 flows back into the oil cylinder 113 for cooling, thereby circulating and cooling the pump oil.

[0070] Among them, such as Figure 4 As shown, the oil inlet 111 and oil outlet 112 are located on the side wall of the oil pipeline 11, and the axes of the oil inlet 111 and oil outlet 112 are perpendicular to the axis of the oil cylinder 113. For example... Figure 3As shown, there is a gap between the free end of the support column 117 and the oil inlet 111 along the axial direction, so that when the pump oil flows into the oil chamber, it can fall into the non-spiral part of the first cooling pipe 12 to provide a buffer space for the pump oil. After the pump oil in the oil tank 3 flows into the oil chamber from the oil inlet 111, it flows along the axial direction toward the oil outlet 112. During the flow, the pump oil passes through the first cooling pipe 12 and exchanges heat with the first cooling pipe 12, so that the pump oil is cooled down. The cooled pump oil flows out from the oil outlet 112 and then flows into the pump body 2.

[0071] In this embodiment, the oil inlet 111 is located on the side of the oil cylinder 113 near the opening, that is, the oil inlet 111 is located close to the water inlet 121 of the first cooling pipe 12, so that the pump oil with a higher temperature comes into contact with the lower temperature part of the first cooling pipe 12 as soon as possible, thereby enabling the pump oil temperature to drop rapidly and improving the cooling efficiency.

[0072] Of course, the oil inlet 111 can also be set close to the water outlet 122. The positions of the water inlet 121 and the water outlet 122 can be selected according to actual needs, and there are no restrictions here.

[0073] Furthermore, such as Figures 2 to 4 As shown, the projections of the axis of the oil inlet 111 and the axis of the oil outlet 112 onto the same plane do not overlap, that is, the orientation of the oil inlet 111 is different from that of the oil outlet 112. This makes the orientations of the oil inlet 111 and the oil outlet 112 staggered. On the one hand, it can avoid interference with the pipelines connected to the oil inlet 111 and the oil outlet 112. On the other hand, it can increase the flow path of the pumped oil in the oil cylinder 113, so that the oil inlet 111 and the oil outlet 112 are not on the same straight line, thereby prolonging the flow time of the pumped oil in the oil chamber and thus increasing the cooling effect.

[0074] In this embodiment, such as Figure 3 , Figure 4 As shown, the oil inlet 111 and the oil outlet 112 are respectively located at the upper and lower ends of the oil cylinder 113. The opening direction of the oil inlet 111 is completely opposite to that of the opening direction of the oil outlet 112, so that the overall flow path of the oil in the oil chamber is roughly S-shaped, which further increases the flow path of the pump oil, increases the contact area and contact time between the pump oil and the first cooling pipe 12, thereby improving the cooling effect.

[0075] Example 2

[0076] This embodiment is a further improvement upon Embodiment 1; such as... Figure 5 , Figure 6As shown, the liquid cooling pipeline also includes a second cooling pipe 13, which is sleeved outside the oil pipeline 11. The second cooling pipe 13 allows for the flow of cooling liquid, and the cooling liquid inside the second cooling pipe 13 directly contacts the outer wall of the oil pipeline 11, thereby cooling the oil pipeline 11. The cooled oil pipeline 11 can then cool the pump oil. With the cooperation of the first cooling pipe 12 and the second cooling pipe 13, dual-effect cooling is achieved inside and outside the oil pipeline 11, thereby accelerating the cooling speed of the pump oil to meet the requirements of rapid oil cooling, so that the pump oil can be quickly reduced to an appropriate temperature.

[0077] Specifically, such as Figure 5 , Figure 6 As shown, the second cooling pipe 13 is an annular structure. The inner diameter of the second cooling pipe 13 is larger than the outer diameter of the oil cylinder 113, so that a space for liquid flow is created between the inner wall of the second cooling pipe 13 and the outer wall of the oil cylinder 113. The second cooling pipe 13 is provided with an inlet 131 and an outlet 132. The inlet 131 and the outlet 132 are axially spaced at opposite ends of the second cooling pipe 13. The inlet 131 is used to allow the cooling liquid to flow into the second cooling pipe 13, and the outlet 132 is used to allow the cooling liquid to flow out of the second cooling pipe 13. The inlet 131 and the outlet 132 are axially spaced.

[0078] Among them, such as Figure 5 , Figure 6 As shown, the inlet 131 and outlet 132 are located on the side wall of the second cooling pipe 13. The axes of the inlet 131 and outlet 132 are perpendicular to the axis of the oil cylinder 113. The projections of the axes of the inlet 131 and outlet 132 on the same plane do not overlap, that is, the orientation of the inlet 131 and the outlet 132 are different. This offsets the orientations of the inlet 131 and outlet 132. On the one hand, it avoids interference with the pipes connected to the inlet 131 and outlet 132. On the other hand, it increases the flow path of the coolant in the second cooling pipe 13, so that the inlet 131 and outlet 132 are not on the same straight line, thereby extending the flow time of the coolant in the second cooling pipe 13 and thus increasing the cooling effect on the pump oil.

[0079] like Figure 5 , Figure 6 As shown, the opening orientation of the water inlet 131 is completely opposite to that of the water outlet 132. The water inlet 131 opens upwards, and the water outlet 132 opens downwards. The oil inlet 111 opens outwards, and the oil outlet 112 opens inwards. This makes the overall flow path of the cooling liquid in the second cooling pipe 13 complex, further increasing the contact area and contact time between the liquid and the oil cylinder 113 in the second cooling pipe 13, thereby improving the cooling effect.

[0080] Among them, such as Figure 5As shown, the water inlet 121, water outlet 122, oil inlet 111, water inlet 131, water outlet 132, and oil outlet 112 of the first cooling pipe 12 are distributed sequentially along the axial direction. The oil inlet 111, water inlet 131, oil outlet 112, and water outlet 132 are staggered to reduce interference between the connecting pipes.

[0081] Furthermore, such as Figure 5 , Figure 6 As shown, the axial length of the oil pipe 11 is greater than the axial length of the second cooling pipe 13, and the length of the second cooling pipe 13 is less than the length of the oil pipe 11, thereby avoiding interference between the second cooling pipe 13 and the oil inlet 111 and the oil outlet 112.

[0082] Furthermore, such as Figure 5 , Figure 6 As shown, the outlet 132 of the second cooling pipe 13 is located near the oil inlet 111, and the inlet 131 is located near the oil outlet 112. This allows the cooling liquid in the second cooling pipe 13 to have a greater effect on the pump oil temperature near the oil outlet 112, which can further cool the pump oil to be discharged, thus ensuring a better cooling effect and a better pump oil cooling balance effect.

[0083] Of course, the outlet 132 of the second cooling pipe 13 can be set close to the oil outlet 112, and the inlet 131 can be set close to the oil inlet 111, so that after the pump oil enters the oil cylinder 113, the temperature can drop rapidly under the action of the first cooling pipe 12 and the second cooling pipe 13, thereby improving the cooling rate.

[0084] The specific locations of the inlet 131 and outlet 132 of the second cooling pipe 13 can be set according to the oil temperature requirements of oil-sealed mechanical pumps with different performance characteristics to meet different usage needs.

[0085] It should be noted that the various embodiments of this application can be arbitrarily combined into new embodiments, provided that the solutions do not conflict and the technical solutions can coexist.

[0086] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A cooling device for an oil-sealed mechanical pump, characterized in that, include: Oil pipeline (11) is configured to guide the pump oil in the oil tank (3) to the pump body (2); Liquid cooling pipes are configured to supply cooling liquid for cooling the pump oil in the oil pipe (11); The oil pipe (11) is provided with a support column (117), and the liquid cooling pipe includes a first cooling pipe (12), which is spirally arranged around the support column (117).

2. The cooling device for an oil-sealed mechanical pump according to claim 1, characterized in that, The liquid cooling pipeline also includes a second cooling pipe (13), which is sleeved outside the oil pipeline (11); The second cooling pipe (13) is provided with an inlet (131) and an outlet (132), and the inlet (131) and the outlet (132) are distributed axially at intervals.

3. The cooling device for an oil-sealed mechanical pump according to claim 2, characterized in that, The first cooling pipe (12) is arranged in a two-layer spiral structure; The inlet (131) and outlet (132) are located on the side wall of the second cooling pipe (13), and the projections of the axis of the inlet (131) and the axis of the outlet (132) on the same plane do not overlap.

4. The cooling device for an oil-sealed mechanical pump according to claim 1, characterized in that, The oil pipeline (11) includes a sealing plate (114) and an oil cylinder (113). One end of the oil cylinder (113) is provided with an opening, and the sealing plate (114) is used to seal the opening. The first cooling pipe (12) is located inside the oil cylinder (113), and the water inlet (121) and water outlet (122) of the first cooling pipe (12) pass through the sealing plate (114) and are exposed to the outside of the oil pipe (11).

5. The cooling device for an oil-sealed mechanical pump according to claim 1, characterized in that, The axial length of the support column (117) is less than the axial length of the oil cylinder (113), and the outer diameter of the support column (117) is less than the inner diameter of the oil cylinder (113). The distance between the inner wall of the oil cylinder (113) and the outer wall of the support column (117) is greater than the outer diameter of the first cooling pipe (12).

6. The cooling device for an oil-sealed mechanical pump according to any one of claims 1 to 5, characterized in that, The oil pipeline (11) includes an oil inlet (111) and an oil outlet (112). The oil outlet (112) is used to connect to the pump body (2), and the oil inlet (111) is used to connect to the oil tank (3). The oil inlet (111) and the oil outlet (112) are distributed axially at intervals.

7. The cooling device for an oil-sealed mechanical pump according to claim 6, characterized in that, The oil inlet (111) and oil outlet (112) are located on the side wall of the oil pipeline (11); The projections of the axis of the oil inlet (111) and the axis of the oil outlet (112) on the same plane do not overlap.

8. The cooling device for an oil-sealed mechanical pump according to claim 6, characterized in that, The axial length of the oil pipe (11) is greater than the axial length of the second cooling pipe (13); The projections of the axis of the oil inlet (111) and the axis of the water inlet (131) on the same plane do not overlap, and the projections of the axis of the oil outlet (112) and the axis of the water outlet (132) on the same plane do not overlap.

9. The cooling device for an oil-sealed mechanical pump according to claim 8, characterized in that, The oil inlet (111) is located near the opening of the oil cylinder (113); The water outlet (132) is located near the oil inlet (111), and the water inlet (131) is located near the oil outlet (112). or, The water outlet (132) is located near the oil outlet (112), and the water inlet (131) is located near the oil inlet (111).

10. The cooling device for an oil-sealed mechanical pump according to claim 4, characterized in that, The oil cylinder (113) has a connecting plate (115) at its open end, and the connecting plate (115) is sealed to the sealing plate (114). The connecting plate (115) has a sealing groove (116) on its side facing the sealing plate (114), and a sealing ring is provided in the sealing groove (116). The sealing plate (114) is provided with an axially penetrating mounting hole, which is used to seal and install the first cooling pipe (12).

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