Motor pump housing assembly and motor pump

Abstract

The utility model relates to the technical field of hydraulic equipment, and specifically discloses a motor pump shell assembly and motor pump. The motor pump shell assembly comprises a shell, the shell is equipped with air inlet hole group and oil discharge hole group, the air inlet hole group is located above the oil discharge hole group, the air inlet hole group comprises air inlet hole, air passage and two communication holes that are connected, the air passage extends along the length direction of the shell, the motor assembly is installed in the inside of the shell, the two communication holes are communicated at the two sides of the motor assembly respectively, in the forced discharge process of the cooling oil at the two sides of the motor assembly, the pressure at the two sides of the motor assembly is balanced through the two communication holes and the air passage to eliminate the pressure difference at the two sides of the motor assembly, avoid the movement of the cooling oil in the gap between the stator and the rotor, and reduce the power loss.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic equipment technology, and in particular to a motor pump housing assembly and a motor pump. Background Technology

[0002] High-speed, high-pressure integrated motor pumps typically require additional cooling for their dry casings. Cooling oil is used to cool the stator and rotor inside the casing, and the oil is then discharged via a jet pump. This allows the internal components to operate in an oil-free environment, significantly reducing oil churning losses during rotor rotation and increasing overall power and maximum operating speed. However, during forced oil discharge, a pressure difference exists across the rotor. This pressure difference causes the cooling oil to move through the gap between the rotor and stator, overcoming resistance and resulting in some power loss. Utility Model Content

[0003] The purpose of this invention is to provide a motor pump housing assembly and a motor pump to prevent cooling oil from moving in the gap between the rotor and stator, thereby reducing power loss.

[0004] This utility model provides a motor pump housing assembly, including a housing. The housing has an air inlet group and an oil drain group. The air inlet group is located above the oil drain group and is used to drain oil from inside the housing. The air inlet group includes a connected air inlet, a vent, and at least two connecting holes. The vent extends along the length of the housing. The interior of the housing is used to install a motor assembly. The at least two connecting holes are respectively connected to both sides of the motor assembly. A first end cap and a second end cap are respectively provided at both ends of the housing. The first end cap and the second end cap are respectively provided with a first oil supply group and a second oil supply group. Both the first oil supply group and the second oil supply group are used to supply oil to the interior of the housing.

[0005] As a preferred technical solution for the motor pump housing assembly, the oil drain hole group includes a connected oil discharge hole, an oil collection channel, and two oil collection holes. The oil collection channel extends along the length direction of the housing, and the two oil collection holes are spaced apart along the length direction of the oil collection channel. The oil collection holes are used to connect the oil collection channel and the interior of the housing, and the two oil collection holes are respectively located on both sides of the motor assembly.

[0006] As a preferred technical solution for the motor pump housing assembly, the axis of the oil collection channel is parallel to the centerline of the housing and located directly below the centerline of the housing.

[0007] As a preferred technical solution for the motor pump housing assembly, the air inlet and the oil discharge port are located on the same side of the housing.

[0008] As a preferred technical solution for the motor pump housing assembly, the first oil supply hole group includes a first oil inlet hole, a first oil inlet channel and a first oil injection hole that are connected to each other. The first oil inlet channel has an annular structure and the first oil injection hole is used to spray oil into the housing.

[0009] The second oil supply hole group includes a second oil inlet hole, a second oil inlet channel, and a second oil injection hole that are connected to each other. The second oil inlet channel has an annular structure, and the second oil injection hole is used to spray oil into the housing.

[0010] As a preferred technical solution for the motor pump housing assembly, the axis of the first oil injection hole is parallel to the center line of the first end cover, and the axis of the second oil injection hole is parallel to the center line of the second end cover.

[0011] As a preferred technical solution for the motor pump housing assembly, the first oil injection hole is configured as a plurality of holes, and all of the plurality of first oil injection holes are connected to the first oil inlet channel; the second oil injection hole is configured as a plurality of holes, and all of the plurality of second oil injection holes are connected to the second oil inlet channel.

[0012] As a preferred technical solution for the motor pump housing assembly, one of the first end cover and the second end cover is provided with a jet hole group, which is used to install an ejector and is connected to the oil drain hole group.

[0013] This utility model provides a motor pump, including a main shaft and a motor assembly, the motor assembly driving the main shaft to rotate, and also including a motor pump housing assembly of any of the above-mentioned schemes, the motor assembly being disposed inside the housing and dividing the internal space of the motor pump housing assembly into a first cavity and a second cavity, the two connecting holes respectively communicating with the first cavity and the second cavity.

[0014] As a preferred technical solution for the motor pump, it also includes an ejector, wherein the suction port of the ejector is connected to the oil discharge port group.

[0015] The beneficial effects of this utility model are as follows:

[0016] This utility model provides a motor pump housing assembly. By setting a vent and two connecting holes in the housing, and connecting the two connecting holes to the two sides of the motor assembly respectively, the pressure on the two sides of the motor assembly is balanced through the two vents and connecting holes during the forced discharge of cooling oil from the two sides of the motor assembly. This eliminates the pressure difference on the two sides of the motor assembly, prevents the cooling oil from moving in the gap between the stator and rotor, and reduces power loss.

[0017] This invention provides a motor pump. By setting the motor pump housing assembly of this invention, there is no pressure difference on both sides of the rotor during the forced discharge of cooling oil. This avoids the cooling oil moving in the gap between the stator and the rotor to overcome resistance and do work, thereby reducing power loss and increasing the maximum operating speed. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the motor pump from a first-view perspective in an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the motor pump from a second perspective in an embodiment of this utility model;

[0020] Figure 3 This is one of the schematic diagrams of the internal structure of the motor pump in the embodiments of this utility model;

[0021] Figure 4 for Figure 3 A magnified view of part A in the middle;

[0022] Figure 5 This is the second schematic diagram of the internal structure of the motor pump in this embodiment of the present invention;

[0023] Figure 6 This is a cross-sectional view of the motor pump in an embodiment of this utility model;

[0024] Figure 7 This is a cross-sectional view of the first end cap in an embodiment of the present utility model;

[0025] Figure 8 This is a cross-sectional view of the second end cap in an embodiment of the present invention.

[0026] In the picture:

[0027] 1. Housing; 11. Air inlet; 12. Vent; 13. Connecting hole; 14. Oil collection hole; 15. Oil collection channel; 16. Oil discharge hole;

[0028] 2. First end cap; 21. First oil inlet; 22. First oil inlet passage; 23. First injection hole; 24. Jet inlet; 25. Jet outlet;

[0029] 3. Second end cap; 31. Second oil inlet; 32. Second oil inlet passage; 33. Second oil injection hole;

[0030] 4. Stator; 5. Rotor; 6. Main shaft; 10. First cavity; 20. Second cavity. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for 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, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] like Figures 1-8As shown, this utility model relates to a motor pump housing assembly, which is applied to a motor pump, specifically a dry-type motor pump. The motor pump housing assembly includes a housing 1, a first end cover 2, and a second end cover 3. The housing 1 has an open structure at both ends, with the first end cover 2 and the second end cover 3 respectively located at both ends to form an internal space. The motor assembly and main shaft 6 are disposed within this internal space. The motor assembly includes a stator 4 and a rotor 5. The housing 1 has an air inlet group and an oil drain group. The air inlet group is located above the oil drain group. The oil drain group is used to drain oil from inside the housing 1. The air inlet group includes a connected air inlet 11, a vent 12, and at least two connecting holes 13. The air inlet 11 communicates with the atmosphere or an air source, the vent 12 extends along the length of the housing 1, and the at least two connecting holes 13 communicate with the interior of the housing 1. The interior of the housing 1 is used to install the motor assembly, and the at least two connecting holes 13 connect to both sides of the motor assembly. The first end cover 2 and the second end cover 3 are respectively provided with a first oil supply hole group and a second oil supply hole group, both of which are used to supply oil to the inside of the housing 1. By providing a vent 12 and two connecting holes 13 in the housing 1, and making the two connecting holes 13 connect to both sides of the motor assembly, the cooling oil is discharged through the oil drain hole group after completing heat exchange. During the discharge process, the pressure on both sides of the motor assembly is balanced through the two vent 12 and the connecting holes 13 to eliminate the pressure difference on both sides of the motor assembly, prevent the cooling oil from moving in the gap between the stator 4 and the rotor 5, and reduce power loss.

[0036] Furthermore, such as Figure 3 , Figure 5 and Figure 6 As shown, the oil drain hole assembly includes a connected oil drain hole 16, an oil collecting channel 15, and two oil collecting holes 14. The oil collecting channel 15 extends along the length of the housing 1, and the two oil collecting holes 14 are spaced apart along the length of the oil collecting channel 15, connecting the oil collecting channel 15 to the interior of the housing 1. Both oil collecting holes 14 are connected to the interior of the housing 1, and the distance between the two oil collecting holes 14 is greater than the length of the motor assembly. The two oil collecting holes 14 are respectively connected to both sides of the motor assembly. Cooling oil from both sides of the motor assembly flows into the oil collecting channel 15 through the two oil collecting holes 14, flows along the oil collecting channel 15 to the oil drain hole 16, and is discharged through the oil drain hole 16 to the heat exchanger or oil tank.

[0037] Specifically, the axis of the oil collecting channel 15 is parallel to the center line of the housing 1 and located directly below the center line of the housing 1, and both oil collecting holes 14 extend upward perpendicularly to the oil collecting channel 15. With this configuration, the cooling oil at the lowest point inside the housing 1 can also enter the oil collecting channel 15 through the oil collecting holes 14, avoiding residue.

[0038] Optionally, the air inlet 11 is perpendicular to the vent 12, and is used to connect to the atmosphere or an air supply connector. A filter is installed at the corresponding position to filter the incoming air. The oil drain hole 16 is perpendicular to the oil collection channel 15, and an oil pipe is connected to the oil drain hole 16. The oil pipe is connected to the heat exchanger or oil tank. The air inlet 11 and the oil drain hole 16 are located on the same side of the housing 1, reducing space occupation, making the pipeline route more regular, and facilitating installation and maintenance.

[0039] Furthermore, such as Figures 6-8 As shown, the first oil supply hole group includes a first oil inlet hole 21, a first oil inlet channel 22, and a first oil spray hole 23 that are connected. The first oil inlet channel 22 has an annular structure, and the first oil spray hole 23 is used to spray oil into the housing 1. Cooling oil enters the first oil inlet channel 22 through the first oil inlet hole 21, diffuses, and is sprayed into the housing 1 through the first oil spray hole 23. The second oil supply hole group includes a second oil inlet hole 31, a second oil inlet channel 32, and a second oil spray hole 33 that are connected. The second oil inlet channel 32 has an annular structure, and the second oil spray hole 33 is used to spray oil into the housing 1. Cooling oil enters the second oil inlet channel 32 through the second oil inlet hole 31, diffuses, and is sprayed into the housing 1 through the second oil spray hole 33. The first end cap 2 and the second end cap 3 can be manufactured by separate manufacturing followed by welding, lost foam casting, or powder metallurgy to meet the shape requirements of the oil spray hole and the annular structure of the oil inlet channel.

[0040] Furthermore, the axis of the first oil injection hole 23 is parallel to the center line of the first end cover 2, and the axis of the second oil injection hole 33 is parallel to the center line of the second end cover 3. This arrangement allows for a longer spray distance of the cooling oil, ensuring that the sprayed cooling oil falls onto the motor assembly to cool it down, thus achieving better heat dissipation efficiency. Multiple first oil injection holes 23 are provided, each connected to the first oil inlet channel 22. Similarly, multiple second oil injection holes 33 are provided, each connected to the second oil inlet channel 32. By providing multiple first oil injection holes 23 and second oil injection holes 33, the cooling oil covers a larger area on the motor assembly, further improving heat dissipation. Specifically, in this embodiment, two first oil injection holes 23 and two second oil injection holes 33 are each provided, with the two first oil injection holes 23 symmetrically arranged on the first oil inlet channel 22 and the two second oil injection holes 33 symmetrically arranged on the second oil inlet channel 32. The first oil injection hole 23 and the second oil injection hole 33 are both set to two. While improving the heat dissipation effect, it ensures that the cooling oil has a high injection pressure, ensuring that the cooling oil can fall on the motor assembly. After the cooling oil falls on the motor assembly, it can quickly diffuse or splash, increasing the heat exchange area and improving the heat exchange efficiency.

[0041] Furthermore, please refer to Figure 2As shown, both the vent 12 and the oil collecting channel 15 are arranged to extend through the length of the shell 1 to reduce the processing difficulty of the shell 1. To meet the installation requirements of the ejector, one of the first end cover 2 and the second end cover 3 is provided with an ejector hole group, which is used to install the ejector and is connected to the oil drain hole group. In this embodiment, the first end cover 2 is provided with an ejector hole group. Specifically, the ejector hole group includes an ejector inlet 24 and an ejector outlet 25. The inlet section and outlet section of the ejector (not shown in the figure) are respectively installed in the ejector inlet 24 and the ejector outlet 25. One end of the oil collecting channel 15 is directly connected to the ejector hole group, and the suction port of the ejector is connected to the oil collecting channel 15. Under the negative pressure of the ejector, the cooling oil inside the shell 1 quickly gathers towards the oil collecting hole 14 and enters the oil collecting channel 15. Finally, the cooled oil after heat exchange is quickly discharged through the oil drain hole 16, improving the heat exchange efficiency and avoiding excessive accumulation of cooling oil and resulting oil churning loss.

[0042] This invention provides an electric motor pump, including a main shaft 6 and a motor assembly, the motor assembly driving the main shaft 6 to rotate. The motor assembly includes a stator 4 and a rotor 5, the rotor 5 driving the main shaft 6 to rotate. The electric motor pump also includes the electric motor pump housing assembly of this embodiment. The motor assembly is disposed inside the housing 1, dividing the internal space of the electric motor pump housing assembly into a first cavity 10 and a second cavity 20. Two connecting holes 13 are respectively connected to the first cavity 10 and the second cavity 20, and two oil collecting holes 14 are respectively connected to the first cavity 10 and the second cavity 20. By setting the electric motor pump housing assembly of this invention, during the forced discharge of cooling oil, there is no pressure difference on both sides of the rotor 5, avoiding the cooling oil moving against resistance and doing work in the gap between the stator 4 and the rotor 5, thereby reducing power loss and increasing the maximum operating speed.

[0043] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A motor pump housing assembly, characterized in that, include: The housing (1) is provided with an air inlet group and an oil drain group. The air inlet group is located above the oil drain group. The oil drain group is used to discharge the oil inside the housing (1). The air inlet group includes a connected air inlet (11), a vent (12) and at least two connecting holes (13). The vent (12) extends along the length of the housing (1). The interior of the housing (1) is used to install a motor assembly. The at least two connecting holes (13) are respectively connected to both sides of the motor assembly. The housing (1) is provided with a first end cap (2) and a second end cap (3) at both ends. The first end cap (2) and the second end cap (3) are respectively provided with a first oil supply hole group and a second oil supply hole group. The first oil supply hole group and the second oil supply hole group are both used to supply oil to the inside of the housing (1).

2. The motor pump housing assembly according to claim 1, characterized in that, The oil drain hole group includes a connected oil drain hole (16), an oil collection channel (15), and two oil collection holes (14). The oil collection channel (15) extends along the length direction of the housing (1), and the two oil collection holes (14) are spaced apart along the length direction of the oil collection channel (15). The oil collection holes (14) are used to connect the oil collection channel (15) and the interior of the housing (1). The two oil collection holes (14) are respectively on both sides of the motor assembly.

3. The motor pump housing assembly according to claim 2, characterized in that, The axis of the oil collection channel (15) is parallel to the center line of the housing (1) and is located directly below the center line of the housing (1).

4. The motor pump housing assembly according to claim 2, characterized in that, The air inlet (11) and the oil discharge port (16) are located on the same side of the housing (1).

5. The motor pump housing assembly according to claim 1, characterized in that, The first oil supply hole group includes a first oil inlet hole (21), a first oil inlet channel (22) and a first oil spray hole (23) that are connected to each other. The first oil inlet channel (22) has an annular structure and the first oil spray hole (23) is used to spray oil into the housing (1). The second oil supply hole group includes a second oil inlet hole (31), a second oil inlet channel (32), and a second oil spray hole (33) that are connected to each other. The second oil inlet channel (32) has an annular structure, and the second oil spray hole (33) is used to spray oil into the housing (1).

6. The motor pump housing assembly according to claim 5, characterized in that, The axis of the first injection hole (23) is parallel to the center line of the first end cap (2), and the axis of the second injection hole (33) is parallel to the center line of the second end cap (3).

7. The motor pump housing assembly according to claim 5, characterized in that, The first injection hole (23) is configured to be multiple, and the multiple first injection holes (23) are all connected to the first oil inlet channel (22); the second injection hole (33) is configured to be multiple, and the multiple second injection holes (33) are all connected to the second oil inlet channel (32).

8. The motor pump housing assembly according to any one of claims 1-6, characterized in that, One of the first end cap (2) and the second end cap (3) is provided with a jet hole group, which is used to install an ejector and is connected to the oil drain hole group.

9. An electric pump, comprising a main shaft (6) and a motor assembly, the motor assembly driving the main shaft (6) to rotate, characterized in that, It also includes the motor pump housing assembly according to any one of claims 1-8, wherein the motor assembly is disposed inside the housing (1) and divides the internal space of the motor pump housing assembly into a first cavity (10) and a second cavity (20), and the two connecting holes (13) are respectively connected to the first cavity (10) and the second cavity (20).

10. The electric pump according to claim 9, characterized in that, It also includes an ejector, the suction port of which is connected to the oil discharge port group.

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