Motor pump cooling structure, motor pump and vehicle

Abstract

The utility model belongs to vehicle technical field discloses motor pump cooling structure, motor pump and vehicle. The motor pump cooling structure includes motor shell and two end covers, and the motor shell is equipped with main flow channel, two end covers are connected in the motor shell along the axial direction one -to -one and are surrounded between the motor shell and form the installation space, at least one end cover is equipped with first liquid cooling flow channel, first injection hole group and second injection hole group, first liquid cooling flow channel is communicated with main flow channel, and first injection hole group's first injection hole and second injection hole group's second injection hole all are communicated with first liquid cooling flow channel, and first injection hole and second injection hole all are communicated with installation space, and first injection hole is used for the axial end surface injection liquid to motor pump's stator, and second injection hole is used for the axial end surface injection liquid to motor pump's rotor body, and the axial direction of motor shell is parallel with the axial direction of stator. Can effectively promote the cooling effect of liquid cooling cooling of stator and rotor, and simple structure.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a motor pump cooling structure, a motor pump, and a vehicle. Background Technology

[0002] An electric motor pump is a liquid conveying device driven by an electric motor. It is widely used in many fields such as industry, agriculture, construction, and municipal engineering. It consists of two parts: an electric motor and a pump. The electric motor is the power source that drives the pump, while the pump is used to deliver the liquid to the target location at a certain pressure.

[0003] Currently, motor pumps in related technologies typically have a cooling jacket installed on the outer periphery of the stator, forming a first coolant flow path on the cooling jacket to liquid cool the stator of the motor pump. A second liquid cooling channel is also provided in the rotor shaft, which is axially connected, to liquid cool the rotor shaft. Although this can achieve liquid cooling of the motor, the structure is complex, and the cooling effect on the rotor needs to be improved. Utility Model Content

[0004] The purpose of this invention is to provide a cooling structure for an electric motor pump, an electric motor pump, and a vehicle, so as to solve the above-mentioned problems existing in the electric motor pump of the prior art.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] The motor pump cooling structure includes:

[0007] The motor housing has a main channel, and the inlet of the main channel extends to the outer peripheral wall of the motor housing and is used to communicate with the pump oil source.

[0008] Two end caps are connected one-to-one to the two ends of the motor housing along the axial direction and form an installation space between them. At least one end cap is provided with a first liquid cooling channel, a first group of injection holes, and a second group of injection holes. The first liquid cooling channel is connected to the main channel. The first injection hole of the first group of injection holes and the second injection hole of the second group of injection holes are both connected to the first liquid cooling channel and are also connected to the installation space. The first injection hole is used to spray liquid onto the axial end face of the stator of the motor pump, and the second injection hole is used to spray liquid onto the axial end face of the rotor body of the motor pump. The axial direction of the motor housing is parallel to the axial direction of the stator.

[0009] As an optional solution for the above-mentioned motor pump cooling structure, the first liquid cooling channel includes a first sub-liquid cooling channel and a second sub-liquid cooling channel that are connected to each other. The first sub-liquid cooling channel is connected to the main channel and to the first injection hole of the first injection hole group. The second sub-liquid cooling channel is connected to the second injection hole of the second injection hole group. Along the axial direction of the motor housing, the second sub-liquid cooling channel is closer to the rotor body than the first sub-liquid cooling channel.

[0010] As an optional embodiment of the above-mentioned motor pump cooling structure, the first sub-liquid cooling channel is an annular channel, and a plurality of first liquid cooling outlets are provided on the first sub-liquid cooling channel at circumferential intervals. The plurality of first liquid cooling outlets are connected one-to-one with a plurality of first injection holes of the first injection hole group, and the plurality of first injection holes of the first injection hole group are distributed at circumferential intervals along the first sub-liquid cooling channel; and / or,

[0011] The second sub-liquid cooling channel is an annular channel, and multiple second liquid cooling outlets are provided on the second sub-liquid cooling channel at intervals along the circumference. The multiple second liquid cooling outlets are connected to the multiple second injection holes of the second injection hole group in a one-to-one correspondence, and the multiple second injection holes of the second injection hole group are distributed at intervals along the circumference of the second sub-liquid cooling channel.

[0012] As an alternative to the above-mentioned motor pump cooling structure, the spray direction of the first spray hole is inclined away from the central axis of the motor housing.

[0013] As an alternative to the above-mentioned motor pump cooling structure, along the radial direction of the motor housing, the output end of the second injection hole is located between the inner and outer peripheral walls of the rotor body, and the distance between the output end of the second injection hole and the inner peripheral wall of the rotor body is smaller than the distance between the output end of the second injection hole and the outer peripheral wall of the rotor body.

[0014] As an alternative to the above-mentioned motor pump cooling structure, the spray direction of the second spray hole is inclined towards the central axis of the motor housing.

[0015] As an optional solution to the above-mentioned motor pump cooling structure, the motor pump cooling structure further includes a cooling sleeve fixedly disposed on the motor housing and used to be sleeved on the outer periphery of the stator. The cooling sleeve is provided with a second liquid cooling channel, which is connected to the main channel, and the outlet of the second liquid cooling channel extends to the inner peripheral wall of the cooling sleeve.

[0016] The motor pump includes a stator and a rotor. The rotor includes a rotor shaft and a rotor body fixedly sleeved on the outer periphery of the rotor shaft. The motor pump also includes the aforementioned motor pump cooling structure. The stator is fixedly disposed inside the motor housing and sleeved on the outer periphery of the rotor body. The rotor shaft is rotatably connected to the two end caps.

[0017] As an alternative to the above-mentioned motor pump, the motor pump further includes two plunger pumps, which are respectively disposed on the two end covers, and the main shafts of the two plunger pumps are respectively connected to the two ends of the rotor shaft for transmission.

[0018] The rotor shaft is provided with a third liquid-cooled flow channel that runs through its own axial direction, and the main shafts of the two plunger pumps are each provided with a fourth liquid-cooled flow channel. The two ends of the third liquid-cooled flow channel are connected to the fourth liquid-cooled flow channels of the two main shafts in a corresponding manner, and the fourth liquid-cooled flow channels of the two main shafts are also connected to the main flow channel.

[0019] Vehicles, including the aforementioned motor pump.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a motor pump cooling structure, a motor pump, and a vehicle. The motor pump cooling structure includes a motor housing and two end caps. The motor housing has a main flow channel, the inlet of which extends to the outer peripheral wall of the motor housing and is used to communicate with the pump oil source. The two end caps are connected to the two ends of the motor housing along the axial direction, forming an installation space between them. At least one end cap has a first liquid cooling channel, a first group of injection holes, and a second group of injection holes. The first liquid cooling channel communicates with the main flow channel. The first injection hole of the first group of injection holes and the second injection hole of the second group of injection holes are both connected to the first liquid cooling channel and to the installation space. The first injection hole is used to spray liquid onto the axial end face of the stator of the motor pump, and the second injection hole is used to spray liquid onto the axial end face of the rotor body of the motor pump. The axial direction of the motor housing is parallel to the axial direction of the stator.

[0022] This liquid-cooling structure for an electrolytic pump features a main channel on the motor housing, a first liquid-cooling channel on at least one end cover, and a first and second group of injection holes on the end cover with the first liquid-cooling channel. When liquid-cooling the stator and rotor of the electrolytic pump, the liquid flowing into the main channel passes sequentially through the main channel and the first liquid-cooling channel, and is then sprayed from the first injection hole of the first group of injection holes onto the axial end face of the stator, thus liquid-cooling the stator. Simultaneously, the liquid is sprayed from the second injection hole of the second group of injection holes onto the axial end face of the rotor, thus liquid-cooling the rotor. This significantly improves the cooling effect on the stator and rotor of the electrolytic pump compared to existing technologies. Furthermore, the main channel of this liquid-cooling structure is connected to the pump oil source. This means that the liquid used for liquid-cooling the stator and rotor, as well as the liquid pumped by the electrolytic pump, both originate from the pump oil source. This simplifies the structure of the electrolytic pump and reduces its production cost compared to existing technologies.

[0023] Therefore, the cooling structure of this motor pump can effectively improve the cooling effect of liquid cooling of the stator and rotor, and the structure is simple. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the motor pump provided in a specific embodiment of this utility model.

[0025] In the picture:

[0026] 1. The mainstream path;

[0027] 21. First liquid cooling channel; 211. First sub-liquid cooling channel; 212. Second sub-liquid cooling channel; 213. Connecting channel; 22. First injection hole; 23. Second injection hole;

[0028] 3. Cooling jacket; 31. Second liquid cooling channel;

[0029] 100. Stator;

[0030] 200, Rotor; 210, Rotor body; 220, Rotor shaft; 221, Third liquid cooling channel. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] This utility model provides a cooling structure for an electric motor pump, such as... Figure 1 As shown, the motor pump cooling structure includes a motor housing and two end caps. The motor housing has a main channel 1, the inlet of which extends to the outer peripheral wall of the motor housing and is used to communicate with the pump oil source. The two end caps are connected to the two ends of the motor housing along the axial direction and form an installation space between them. At least one end cap has a first liquid cooling channel 21, a first injection hole group, and a second injection hole group. The first liquid cooling channel 21 is connected to the main channel 1. The first injection hole 22 of the first injection hole group and the second injection hole 23 of the second injection hole group are both connected to the first liquid cooling channel 21. The first injection hole 22 and the second injection hole 23 are both connected to the installation space. The first injection hole 22 is used to spray liquid onto the axial end face of the stator 100 of the motor pump, and the second injection hole 23 is used to spray liquid onto the axial end face of the rotor body 210 of the motor pump. The axial direction of the motor housing is parallel to the axial direction of the stator 100.

[0036] The liquid cooling structure of this motor pump features a main flow channel 1 on the motor housing, a first liquid cooling channel 21 on at least one end cover, and a first injection hole group and a second injection hole group on the end cover with the first liquid cooling channel 21. When the stator 100 and rotor 200 of the motor pump are liquid cooled, the liquid flowing into the main flow channel 1 passes sequentially through the main flow channel 1 and the first liquid cooling channel 21, and is then sprayed from the first injection hole 22 of the first injection hole group onto the axial end face of the stator 100 of the motor pump, thus liquid cooling the stator 100. Simultaneously, the liquid is sprayed from the second injection hole of the second injection hole group... 23 is sprayed onto the axial end face of the rotor body 210 of the electric motor pump to perform liquid cooling of the rotor body 210. Compared with the prior art, this can effectively improve the cooling effect of liquid cooling of the stator 100 and rotor body 210 of the electrolytic pump. Secondly, the liquid cooling structure of the electric motor pump is set with the main channel 1 connected to the pump oil source. It can be understood that the liquid used by the electric motor pump to liquid cool the stator 100 and rotor 200 and the liquid pumped by the electric motor pump both come from the pump oil source. Compared with the prior art, this can effectively simplify the structure of the electric motor pump and reduce the production cost of the electric motor pump.

[0037] Therefore, the cooling structure of this motor pump can effectively improve the cooling effect of liquid cooling of stator 100 and rotor 200, and the structure is simple.

[0038] Optionally, in this embodiment, as Figure 1 As shown, the first liquid cooling channel 21 includes a first sub-liquid cooling channel 211 and a second sub-liquid cooling channel 212 that are connected to each other. The first sub-liquid cooling channel 211 is connected to the main channel 1 and to the first injection hole 22 of the first injection hole group. The second sub-liquid cooling channel 212 is connected to the second injection hole 23 of the second injection hole group. Along the axial direction of the motor housing, the second sub-liquid cooling channel 212 is closer to the rotor body 210 than the first sub-liquid cooling channel 211. Since the axial length of the rotor body 210 is usually less than the axial length of the stator 100 along the axial direction of the rotor 200, and the rotor body 210 is located between the two ends of the stator 100 along the axial direction, the second sub-liquid cooling channel 212 is positioned closer to the rotor body 210 than the first sub-liquid cooling channel 211 along the axial direction of the motor housing. This effectively reduces the distance between the second injection hole 23 and one of the two axial end faces of the rotor body 210 that are close to each other, thereby effectively improving the reliability of liquid cooling by spraying liquid onto the axial end face of the rotor body 210 through the second injection hole 23.

[0039] Furthermore, in this embodiment, by way of example, the distance between the first injection hole 22 and one of the two axial end faces of the stator 100 that are close to each other is set as a first distance along the axial direction of the motor housing, and the distance between the second injection hole 23 and one of the two axial end faces of the rotor body 210 that are close to each other is set as a second distance. The first distance is approximately equal to the second distance, which can effectively improve the reliability of liquid cooling by spraying liquid onto the axial end face of the rotor body 210 through the second injection hole 23, and can also improve the consistency of liquid spraying onto the axial end face of the stator 100 through the first injection hole 22 and liquid spraying onto the axial end face of the rotor body 210 through the second injection hole 23.

[0040] In other embodiments, the first sub-liquid cooling channel 211 and the second sub-liquid cooling channel 212 may be located at the same position along the axial direction of the motor housing.

[0041] Specifically, in this embodiment, as Figure 1 As shown, the first liquid cooling channel 21 also includes a connecting channel 213, which connects the first sub-liquid cooling channel 211 and the second sub-liquid cooling channel 212.

[0042] Specifically, in this embodiment, the first sub-liquid cooling channel 211 is sealed and connected to the main channel 1. The specific structure of the sealed connection is prior art, so it will not be described in detail here.

[0043] Optionally, in this embodiment, the first sub-liquid cooling channel 211 is an annular channel, and a plurality of first liquid cooling outlets are provided on the first sub-liquid cooling channel 211 at intervals along the circumference. The plurality of first liquid cooling outlets are connected to a plurality of first injection holes 22 of the first injection hole group in a one-to-one correspondence, and the plurality of first injection holes 22 of the first injection hole group are distributed at intervals along the circumference of the first sub-liquid cooling channel 211. This arrangement allows liquid to be sprayed synchronously and approximately uniformly to various parts of the axial end face of the stator 100 along the circumference, so that the axial end face of the stator 100 can be cooled by liquid cooling in a approximately uniform manner.

[0044] Alternatively, in this embodiment, a plurality of first injection holes 22 are evenly spaced along the circumference of the first sub-liquid cooling channel 211. This further enhances the ability of the stator 100 to be liquid-cooled at approximately uniform intervals along the circumference of the stator 100, at various points on the axial end face of the stator 100.

[0045] Optionally, in this embodiment, the second sub-liquid cooling channel 212 is an annular channel, and a plurality of second liquid cooling outlets are provided on the second sub-liquid cooling channel 212 at intervals along the circumference. The plurality of second liquid cooling outlets are connected to a plurality of second injection holes 23 of the second injection hole group in a one-to-one correspondence, and the plurality of second injection holes 23 of the second injection hole group are distributed at intervals along the circumference of the second sub-liquid cooling channel 212. This arrangement allows liquid to be sprayed synchronously and approximately uniformly on all parts of the axial end face of the rotor body 210 along the circumference, so that all parts of the axial end face of the rotor body 210 can be cooled by liquid cooling in a approximately uniform manner.

[0046] Alternatively, in this embodiment, a plurality of second injection holes 23 are evenly spaced along the circumference of the second sub-liquid cooling channel 212. This further enhances the ability of the rotor body 210 to be liquid-cooled at approximately uniform intervals along the circumference of the rotor body 210, and the axial end face of the rotor body 210 to be cooled by liquid cooling in a substantially uniform manner.

[0047] In other embodiments, the shapes of the first sub-liquid cooling channel 211 and / or the second sub-liquid cooling channel 212 can be adaptively adjusted according to actual working conditions.

[0048] In this embodiment, as Figure 1 As shown, each end cap is provided with a first liquid cooling channel 21, a first injection hole group and a second injection hole group; the first liquid cooling channel 21, the first injection hole group and the second injection hole group on the two end caps are symmetrically distributed in a one-to-one correspondence.

[0049] Specifically, the first injection hole 22 of the first injection hole group is divided into a first sub-injection hole group located above the dividing line, and a second sub-injection hole group located below the dividing line, with the central axis of the motor housing as the dividing line. Figure 1 The first injection hole 22 located above the central axis of the motor housing forms the first sub-injection hole group, and the first injection hole 22 located above the central axis of the motor housing forms the second sub-injection hole group.

[0050] Optionally, in this embodiment, as Figure 1As shown, along the radial direction of the motor housing, the first injection hole 22 in the first sub-injection hole group is located between the outer peripheral wall and the inner peripheral wall of the stator 100, and the distance between the output end of the first injection hole 22 in the first sub-injection hole group and the outer peripheral wall of the stator 100 is smaller than the distance between the output end of the first injection hole 22 in the first sub-injection hole group and the inner peripheral wall of the stator 100. Since the stator 100 is fixed, the first injection hole 22 in the first sub-injection hole group is arranged radially close to the outer periphery of the stator 100, so that the liquid sprayed onto the upper axial end face of the stator 100 above the dividing line flows downward under its own gravity, thereby allowing the liquid sprayed onto the upper axial end face of the stator 100 to approximately cover the entire upper axial end face of the stator 100, thereby further improving the effect of approximately uniform liquid cooling of the axial end face of the stator 100.

[0051] Further, optionally, in this embodiment, such as Figure 1 As shown, along the radial direction of the motor housing, the first injection hole 22 in the second sub-injection hole group is located between the outer peripheral wall and the inner peripheral wall of the stator 100, and the distance between the output end of the first injection hole 22 in the second sub-injection hole group and the inner peripheral wall of the stator 100 is smaller than the distance between the output end of the first injection hole 22 in the second sub-injection hole group and the outer peripheral wall of the stator 100. The first injection hole 22 in the second sub-injection hole group is positioned radially close to the inner periphery of the stator 100, so that the liquid sprayed onto the lower axial end face of the stator 100 below the dividing line flows downward under its own gravity. This allows the liquid sprayed onto the lower axial end face of the stator 100 to approximately cover the entire lower axial end face of the stator 100, thereby further improving the effect of approximately uniform liquid cooling of the axial end face of the stator 100.

[0052] Further, optionally, in this embodiment, such as Figure 1 As shown, the spray direction of the first spray hole 22 is inclined away from the central axis of the motor housing. This further improves the ability of the liquid sprayed onto the axial end face of the stator 100 to substantially cover the entire axial end face of the stator 100, thereby further improving the effect of approximately uniform liquid cooling of the axial end face of the stator 100.

[0053] In other embodiments, the first injection hole 22 in the first sub-injection hole group may be located between the outer and inner peripheral walls of the stator 100 along the radial direction of the motor housing, and the distance between the output end of the first injection hole 22 in the first sub-injection hole group and the outer peripheral wall of the stator 100 is greater than or equal to the distance between the output end of the first injection hole 22 in the first sub-injection hole group and the inner peripheral wall of the stator 100. In other embodiments, the first injection hole 22 in the first sub-injection hole group may be located at a position outside the outer periphery or inside the inner periphery of the stator 100 along the radial direction of the motor housing. The goal is to ensure that the first injection hole 22 in the first sub-injection hole group can spray liquid onto the circumferential end face of the rotor body 210.

[0054] In other embodiments, the first injection hole 22 in the second sub-injection hole group may be located between the outer and inner peripheral walls of the stator 100 along the radial direction of the motor housing, and the distance between the output end of the first injection hole 22 in the second sub-injection hole group and the inner peripheral wall of the stator 100 is greater than or equal to the distance between the output end of the first injection hole 22 in the second sub-injection hole group and the outer peripheral wall of the stator 100. In other embodiments, the first injection hole 22 in the second sub-injection hole group may be located at a position outside the outer periphery or inside the inner periphery of the stator 100 along the radial direction of the motor housing. The goal is to ensure that the first injection hole 22 in the second sub-injection hole group can spray liquid onto the circumferential end face of the rotor body 210.

[0055] In other embodiments, the spray direction of the first spray hole 22 may also be set to be parallel to the axial direction of the motor housing.

[0056] Optionally, in this embodiment, as Figure 1 As shown, along the radial direction of the motor housing, the output end of the second injection hole 23 is located between the inner and outer peripheral walls of the rotor body 210, and the distance between the output end of the second injection hole 23 and the inner peripheral wall of the rotor body 210 is smaller than the distance between the output end of the second injection hole 23 and the outer peripheral wall of the rotor body 210. During the rotation of the rotor body 210 around its central axis, the liquid sprayed onto the axial end face of the rotor body 210 flows outward under the centrifugal force of the rotor body 210, thereby allowing the liquid sprayed onto the axial end face of the rotor body 210 to approximately cover the entire axial end face of the rotor body 210, thus further improving the effect of approximately uniform liquid cooling of the rotor body 210.

[0057] Further, optionally, in this embodiment, such as Figure 1As shown, the spray direction of the second spray hole 23 is inclined towards the central axis of the motor housing. This causes the liquid sprayed from the second spray hole 23 onto the rotor body 210, which is approximately positioned near the inner circumference of the axial end face of the rotor body 210. Under the centrifugal force of the rotor body 210, the liquid sprayed onto the axial end face of the rotor body 210 flows outward, thereby allowing the liquid sprayed onto the axial end face of the rotor body 210 to further cover approximately the entire axial end face of the rotor body 210, thus further improving the effect of the rotor body 210 being cooled by liquid cooling in a relatively uniform manner.

[0058] In other embodiments, the output end of the second injection hole 23 may be located between the inner and outer peripheral walls of the rotor body 210 along the radial direction of the motor housing, and the distance between the output end of the second injection hole 23 and the inner peripheral wall of the rotor body 210 is greater than or equal to the distance between the output end of the second injection hole 23 and the outer peripheral wall of the rotor body 210. In other embodiments, the second injection hole 23 may also be located at a position outside the outer periphery or inside the inner periphery of the rotor body 210 along the radial direction of the motor housing. The goal is to ensure that the second injection hole 23 can spray liquid onto the circumferential end face of the rotor body 210.

[0059] In other embodiments, the injection direction of the second injection hole 23 may also be set to be parallel to the axial direction of the motor housing.

[0060] Among them, such as Figure 1 As shown, the motor pump cooling structure also includes a cooling sleeve 3 fixedly mounted on the motor housing and used to cover the outer periphery of the stator 100. The cooling sleeve 3 has a second liquid cooling channel 31, which is connected to the main channel 1. The outlet of the second liquid cooling channel 31 extends to the inner peripheral wall of the cooling sleeve 3. By setting the second liquid cooling channel 31 to also be connected to the main channel 1, when liquid cooling is performed on the stator 100 and rotor 200 of the motor pump, a portion of the liquid in the main channel 1 flows synchronously into the second liquid cooling channel 31 and then flows from the second liquid cooling channel 31 to the outer peripheral wall of the stator 100, thereby further improving the liquid cooling effect on the stator 100. The specific structure of the cooling sleeve 3 is prior art and will not be described in detail here.

[0061] Specifically, in this embodiment, the second liquid cooling channel 31 is sealed and connected to the main channel 1. The specific structure of the sealed connection is prior art, so it will not be described in detail here.

[0062] This utility model also provides an electric motor pump, such as Figure 1As shown, the motor pump includes a stator 100 and a rotor 200. The rotor 200 includes a rotor shaft 220 and a rotor body 210 fixedly sleeved on the outer periphery of the rotor shaft 220. The motor pump also includes the aforementioned motor pump cooling structure. The stator 100 is fixedly installed inside the motor housing and sleeved on the outer periphery of the rotor body 210. The rotor shaft 220 is rotatably connected to two end caps.

[0063] By adopting the above-mentioned motor pump cooling structure, the liquid cooling effect of the motor pump can be effectively improved, and the structure of the motor pump can be effectively simplified, reducing the production cost of the motor pump.

[0064] Specifically, the motor pump also includes two plunger pumps, each mounted on a corresponding end cover, and the main shafts of the two plunger pumps are connected to the two ends of the rotor shaft 220 in a corresponding manner. The rotor shaft 220 drives the main shafts of the two plunger pumps to rotate, enabling the two plunger pumps to work together to pump liquid. The specific structure of the plunger pumps and the specific structure of the transmission connection between the plunger pumps and the rotor shaft 220 are existing technologies and will not be described in detail here.

[0065] More specifically, such as Figure 1 As shown, the rotor shaft 220 is provided with a third liquid-cooled flow channel 221 that runs through its own axial direction. Both main shafts of the two plunger pumps are provided with a fourth liquid-cooled flow channel. The two ends of the third liquid-cooled flow channel 221 are connected to the fourth liquid-cooled flow channels of the two main shafts, and the fourth liquid-cooled flow channels of the two main shafts are also connected to the main flow channel 1. It can be understood that the rotor shaft 220 is a hollow shaft. During the pumping process of the plunger pump, a portion of the liquid is simultaneously sent into the fourth liquid-cooled flow channel. The liquid flows from the fourth liquid-cooled flow channel to the third liquid-cooled flow channel 221 to liquid-cool the rotor shaft 220, thereby further improving the liquid-cooling effect on the motor pump. More specifically, the liquid in the fourth liquid-cooled flow channel can flow out through the lubricating oil passage at the connection between the rotor shaft 220 and the main shaft and finally flow to the bottom of the installation space. The specific structure is prior art and will not be described in detail here. More specifically, the third liquid cooling channel 221 is sealed and connected to the main channel 1, and the third liquid cooling channel 221 is sealed and connected to the fourth liquid cooling channel. The specific structure of the sealed connection belongs to the prior art, so it will not be described in detail here.

[0066] It is understandable that, such as Figure 1 As shown, when the stator 100 and rotor 200 of the motor pump are cooled by liquid cooling, the first part of the liquid flowing into the main flow channel 1 flows to the first liquid cooling channel 21, the second part flows to the second liquid cooling channel 31, the third part flows to the third liquid cooling channel 221, and the remaining part is pumped to the downstream connected structure by two plunger pumps. Specifically, the downstream connected structure is a hydraulic pump or motor, etc.

[0067] This invention also provides a vehicle including the aforementioned motor pump. By employing the aforementioned motor pump, the working performance of the vehicle can be effectively improved, and the production cost of the vehicle can be reduced.

[0068] 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 various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments 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 cooling structure for an electric motor pump, characterized in that, include: The motor housing is provided with a main channel (1), the inlet of which extends through to the outer peripheral wall of the motor housing and is used to communicate with the pump oil source; Two end caps are connected one-to-one to the two ends of the motor housing along the axial direction and form an installation space between them. At least one end cap is provided with a first liquid cooling channel (21), a first injection hole group and a second injection hole group. The first liquid cooling channel (21) is connected to the main channel (1). The first injection hole (22) of the first injection hole group and the second injection hole (23) of the second injection hole group are both connected to the first liquid cooling channel (21). The first injection hole (22) and the second injection hole (23) are both connected to the installation space. The first injection hole (22) is used to spray liquid onto the axial end face of the stator (100) of the motor pump. The second injection hole (23) is used to spray liquid onto the axial end face of the rotor body (210) of the motor pump. The axial direction of the motor housing is parallel to the axial direction of the stator (100).

2. The motor pump cooling structure according to claim 1, characterized in that, The first liquid cooling channel (21) includes a first sub-liquid cooling channel (211) and a second sub-liquid cooling channel (212) that are connected to each other. The first sub-liquid cooling channel (211) is connected to the main channel (1). The first sub-liquid cooling channel (211) is connected to the first injection hole (22) of the first injection hole group. The second sub-liquid cooling channel (212) is connected to the second injection hole (23) of the second injection hole group. Along the axial direction of the motor housing, the second sub-liquid cooling channel (212) is closer to the rotor body (210) than the first sub-liquid cooling channel (211).

3. The motor pump cooling structure according to claim 2, characterized in that: The first sub-liquid cooling channel (211) is an annular channel, and a plurality of first liquid cooling outlets are provided on the first sub-liquid cooling channel (211) at intervals along the circumference. The plurality of first liquid cooling outlets are connected to a plurality of first injection holes (22) of the first injection hole group in a one-to-one correspondence, and the plurality of first injection holes (22) of the first injection hole group are distributed at intervals along the circumference of the first sub-liquid cooling channel (211); and / or, The second sub-liquid cooling channel (212) is an annular channel. The second sub-liquid cooling channel (212) is provided with a plurality of second liquid cooling outlets that are spaced apart along the circumference. The plurality of second liquid cooling outlets are connected to the plurality of second injection holes (23) of the second injection hole group in a one-to-one correspondence. The plurality of second injection holes (23) of the second injection hole group are spaced apart along the circumference of the second sub-liquid cooling channel (212).

4. The motor pump cooling structure according to any one of claims 1-3, characterized in that, The spray direction of the first spray hole (22) is inclined away from the central axis of the motor housing.

5. The motor pump cooling structure according to any one of claims 1-3, characterized in that, Along the radial direction of the motor housing, the output end of the second injection hole (23) is located between the inner and outer peripheral walls of the rotor body (210), and the distance between the output end of the second injection hole (23) and the inner peripheral wall of the rotor body (210) is less than the distance between the output end of the second injection hole (23) and the outer peripheral wall of the rotor body (210).

6. The motor pump cooling structure according to any one of claims 1-3, characterized in that, The spray direction of the second spray hole (23) is inclined toward the central axis of the motor housing.

7. The motor pump cooling structure according to any one of claims 1-3, characterized in that, The motor pump cooling structure further includes a cooling sleeve (3) fixedly disposed on the motor housing and used to be sleeved on the outer periphery of the stator (100). The cooling sleeve (3) is provided with a second liquid cooling channel (31), which is connected to the main channel (1). The outlet of the second liquid cooling channel (31) extends to the inner peripheral wall of the cooling sleeve (3).

8. An electric pump, comprising a stator (100) and a rotor (200), the rotor (200) comprising a rotor shaft (220) and a rotor body (210) fixedly sleeved on the outer periphery of the rotor shaft (220), characterized in that, The motor pump further includes the motor pump cooling structure according to any one of claims 1-7, wherein the stator (100) is fixedly disposed inside the motor housing and sleeved on the outer periphery of the rotor body (210), and the rotor shaft (220) is rotatably connected to the two end caps.

9. The electric pump according to claim 8, characterized in that, The motor pump also includes two plunger pumps, which are respectively disposed on the two end covers, and the main shafts of the two plunger pumps are respectively connected to the two ends of the rotor shaft (220). The rotor shaft (220) is provided with a third liquid cooling channel (221) that runs through its own axial direction. The main shafts of the two plunger pumps are each provided with a fourth liquid cooling channel. The two ends of the third liquid cooling channel (221) are connected to the fourth liquid cooling channels of the two main shafts in a corresponding manner. The fourth liquid cooling channels of the two main shafts are also connected to the main channel (1).

10. A vehicle, characterized in that, Includes the motor pump as described in claim 8 or 9.

Images