Isolation sleeve, water pump, thermal management system and vehicle

Abstract

The utility model relates to the technical field of water pumps, and provides an isolation sleeve, a water pump, a heat management system and a vehicle, the isolation sleeve is applied to the water pump, the water pump is provided with a pump shell, the isolation sleeve is of a cylindrical structure and comprises a heat dissipation piece and a mounting piece which are distributed in the axial direction, and the heat dissipation piece is connected with the mounting piece; the heat dissipation piece is used for being connected with a to-be-cooled assembly to achieve heat exchange, and the installation piece is used for being connected with the pump shell in a sealed mode. According to the spacer sleeve, heat transfer can be achieved through the heat dissipation piece so that the water cooling performance of the spacer sleeve can be met, the assembly process can be simplified through sealed connection of the installation piece and the pump shell, the assembly reliability of the spacer sleeve is improved, and finally the effect of improving the use performance of the spacer sleeve is achieved.

Description

Technical Field

[0001] This application belongs to the field of water pump technology, and more specifically, relates to an isolation sleeve, a water pump, a thermal management system, and a vehicle. Background Technology

[0002] Electronic water pumps are key components in automotive thermal management systems. They are a new type of water pump that uses an integrated electronic system to fully control liquid transport, thereby achieving adjustable and precise liquid delivery. When applied to vehicles, they can transfer heat to critical components such as battery packs by driving liquid flow, keeping the battery packs within a suitable operating temperature range and improving battery safety and lifespan.

[0003] Electric water pumps include an isolation sleeve, which seals the motor and isolates the coolant. Traditionally, during assembly, a metal isolation sleeve requires bolts and a sealing ring between the sleeve and pump housing to ensure a proper seal and prevent liquid ingress. With increasing demands for lightweight vehicles in the automotive industry, electric water pump designs are increasingly favoring lighter materials and more compact structures. For example, to reduce weight, the isolation sleeve is sometimes made of plastic instead of metal. This adjustment not only achieves a lighter design for both the isolation sleeve and the pump but also simplifies the assembly process and improves reliability. However, this method can lead to a decrease in the water-cooling efficiency of the isolation sleeve, affecting its performance. Utility Model Content

[0004] The purpose of this application is to provide an isolation sleeve, a water pump, a thermal management system, and a vehicle to improve the technical problem of poor performance of isolation sleeves in related technologies.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, this application provides an isolation sleeve for use in a water pump. The water pump has a pump casing, and the isolation sleeve has a cylindrical structure. The isolation sleeve includes a heat dissipation component and a mounting component distributed along the axial direction. The heat dissipation component and the mounting component are connected. The heat dissipation component is used to connect with the component to be cooled to achieve heat exchange, and the mounting component is used to seal the connection with the pump casing.

[0007] Optionally, a first mounting portion is provided at one axial end of the heat sink, and a second mounting portion is provided at one axial end of the mounting component;

[0008] The component to be cooled is connected to the heat sink via the first mounting part, and the pump housing is connected to the mounting part via the second mounting part.

[0009] Optionally, the other end of the heat dissipation member in the axial direction is provided with a first connecting part, and the other end of the mounting member in the axial direction is provided with a second connecting part.

[0010] The heat dissipation member and the mounting member are fixedly connected through the first connecting part and the second connecting part, and the inner side wall of the heat dissipation member and the inner side wall of the mounting member are smoothly connected.

[0011] Optionally, the radial thickness of the first connecting part is less than or equal to the radial thickness of the heat dissipation member.

[0012] The second connecting part is sleeved on the first connecting part to seal the first connecting part, or the first connecting part is sleeved on the second connecting part to seal the second connecting part.

[0013] Optionally, the first connecting part is provided with an annular groove in at least one of the radial inner side and the radial outer side, and the second connecting part is provided with an annular protrusion matched with the annular groove, and the number of the annular protrusions is the same as and one-to-one corresponds to the number of the annular grooves.

[0014] Optionally, the number of the annular grooves is at least two and is arranged in the axial direction of the heat dissipation member.

[0015] And / or, at least part of the surface of the annular groove is a curved surface.

[0016] Optionally, a sealing ring is arranged at the connection between the first connecting part and the second connecting part, and the sealing ring is a rubber sealing ring vulcanized to the first connecting part.

[0017] In a second aspect, the application provides a water pump, comprising a pump shell and the isolation sleeve.

[0018] In a third aspect, the application provides a thermal management system, comprising the water pump.

[0019] In a fourth aspect, the application provides a vehicle, comprising the water pump.

[0020] Compared with the prior art, the application has at least the following beneficial effects:

[0021] The isolation sleeve provided by the embodiments of the application has the heat dissipation member and the mounting member arranged in sequence in the axial direction, heat can be transferred through the heat dissipation member to meet the water cooling performance of the isolation sleeve, the mounting member is sealingly connected with the pump shell to simplify the assembly process, improve the assembly reliability, and finally improve the use performance of the isolation sleeve.

[0022] The water pump provided by the embodiments of the present application comprises the isolation sleeve, and therefore has the beneficial effects of any one or more of the isolation sleeves, which will not be repeated here. The heat management system and the vehicle provided by the embodiments of the present application comprise the water pump, and therefore have the beneficial effects of any one or more of the water pumps, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0024] Figure 1 A structural schematic diagram of a water pump provided in the related art;

[0025] Figure 2 A structural schematic diagram of the isolation sleeve provided by the embodiments of the present application;

[0026] Figure 3 A structural schematic diagram of the isolation sleeve provided by the embodiments of the present application; Figure 2 An enlarged view of a structure in region A in FIG. 1;

[0027] Figure 4 A structural schematic diagram of the isolation sleeve provided by another embodiment of the present application;

[0028] Figure 5 A structural schematic diagram of the isolation sleeve provided by another embodiment of the present application; Figure 4 An enlarged view of a structure in region B in FIG. 1.

[0029] In the drawings, various reference signs represent:

[0030] 10, isolation sleeve; 20, pump housing; 30, component to be cooled; 40, pump shaft; 50, rotor; 60, stator; 100, water pump;

[0031] 1, cooling member; 11, first mounting portion; 12, first connecting portion; 121, annular groove; 2, mounting member; 21, second mounting portion; 22, second connecting portion; 221, annular protrusion; 3, sealing ring. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects of the present application more clear, the present application will be further described in detail in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0033] It should be noted that, when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0036] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0038] In this application, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," and so forth indicate that the particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The

[0039] Embodiments of the present application provide an isolation sleeve 10 and a water pump 100, a thermal management system, and a vehicle. The vehicle can be an electric vehicle, a hybrid vehicle, a fuel vehicle, and the like, which are not listed one by one. The vehicle has a thermal management system therein, which is used to ensure that various components inside the vehicle work in an appropriate temperature range. The thermal management system mainly acts on the engine, the battery, and the motor of the vehicle, and is used to cool the above-mentioned key components to ensure their performance and safety, and can also create a comfortable temperature environment in the vehicle. The thermal management system includes the water pump 100, which is used to drive the cooling liquid (such as cooling oil) to circulate between the heat generating components and the heat dissipating components, and to ensure the heat dissipation efficiency by controlling the flow of the cooling liquid.

[0040] Taking the electronic water pump 100 as an example, the electronic water pump 100 includes a pump shaft 40, a rotor 50, a stator 60, a pump shell 20, an isolation sleeve 10, and a heat dissipation component 30 (for example, a circuit board used to control the working state of the electronic water pump 100, and the like), please refer to Figure 1 , Figure 1 is a structural schematic diagram of the water pump 100 provided in the related art. In Figure 1In the embodiment, one end of the isolation sleeve 10 is connected with the pump shell 20, and the other end is arranged in the pump shell 20. The inner wall of the isolation sleeve 10 encloses a containing space for placing the pump shaft 40, the rotor 50 is connected with the pump shaft 40, and the outer wall of the isolation sleeve 10 and the pump shell 20 can enclose a containing space for placing the stator 60 and the component to be cooled 30. At this time, the isolation sleeve 10 can divide the space in the pump shell 20 to make the above two containing spaces independent of each other and realize the dry-wet separation of the stator 60 and the rotor 50, and also prevent the cooling liquid from entering the space where the stator 60 is located, avoiding the leakage of the cooling liquid. When the isolation sleeve 10 is made of metal material, the weight of the isolation sleeve 10 is relatively heavy at this time, which is not conducive to the lightweight design of the water pump 100, and the assembly process between the metal isolation sleeve 10 and the pump shell 20 is relatively complex, which needs to be connected by bolts and a sealing ring 3 is additionally arranged when necessary to prevent liquid leakage, and the assembly reliability is low; when the isolation sleeve 10 is made of plastic material and the like, although it is conducive to the lightweight design of the water pump 100 and can simplify the assembly process, the heat conduction effect of the isolation sleeve 10 is poor at this time, which affects the water cooling performance.

[0041] In order to improve the use performance of the isolation sleeve 10 to some extent and make it better balance the water cooling performance and assembly reliability, the structure of the isolation sleeve 10 is improved in the embodiment.

[0042] Figure 2 The structure diagram of the isolation sleeve 10 provided in the embodiment, Figure 3 The structure diagram of the isolation sleeve 10 provided in the embodiment, Figure 2 The structure enlarged view of the A area in the embodiment, Figure 4 The structure diagram of the isolation sleeve 10 provided in another embodiment of the application, Figure 5 The structure diagram of the isolation sleeve 10 provided in the embodiment, Figure 4 The structure enlarged view of the B area in the embodiment.

[0043] Please refer to Figure 2-5 The isolation sleeve 10 applied to the water pump 100 provided in the embodiment is in a whole cylindrical structure (having a central axis and having a hollow internal space), the isolation sleeve 10 includes the heat dissipation piece 1 and the mounting piece 2 distributed in the axial direction, the heat dissipation piece 1 and the mounting piece 2 are connected, wherein the heat dissipation piece 1 is used to be connected (such as thermally connected) with the component to be cooled 30 to realize heat exchange, and the mounting piece 2 is used to be sealingly connected with the pump shell 20 of the water pump 100.

[0044] The heat-conducting connection refers to a connection between two or more objects so that heat is transferred between them. This connection can achieve effective utilization or heat dissipation. In the embodiment, the heat-conducting connection between the heat-dissipating member 1 and the component to be cooled 30 can transfer the heat on the component to be cooled 30 to the heat-dissipating member 1, and further transfer the heat through the cooling liquid flowing through the heat-dissipating member 1, so as to avoid the accumulation of heat on the component to be cooled 30. Correspondingly, the mounting member 2 can achieve the sealed connection between the isolation sleeve 10 and the pump shell 20 through the welding connection with the pump shell 20, so that the assembly process of the two is simplified, the assembly difficulty of the water pump 100 is reduced, and the assembly reliability of the connection between the two is improved compared with the traditional bolt assembly.

[0045] In other similar embodiments, the sealed connection between the mounting member 2 and the pump shell 20 can also be achieved by using a glue bonding connection or a hot-pressing connection.

[0046] In order to achieve the heat-conducting connection, the heat-dissipating member 1 and the component to be cooled 30 can be directly contacted or abutted by an external force. Of course, a certain gap can be provided between the two, and the gap can be filled with an appropriate amount of heat-conducting medium such as heat-conducting silicone grease or heat-conducting glue. The heat generated on the component to be cooled 30 can be effectively transferred to the heat-dissipating member 1 through the heat-conducting medium, and further transferred out through the cooling liquid. The heat-conducting medium has good thermal conductivity, which can help to improve the problem of local heat accumulation, and make the heat distribution between the heat-dissipating member 1 and the component to be cooled 30 more uniform. In addition, the heat-conducting medium also has a certain sealing performance, which can fill the gap between the isolation sleeve 10 and the component to be cooled 30, so as to prevent foreign matters such as dust and moisture from entering the space between the two.

[0047] Please refer to Figure 2 and Figure 4 The component to be cooled 30 in the embodiment can be a circuit board, and the arrows in the figure represent the direction of heat flow. In some embodiments, the circuit board can be used to control the working state of the water pump 100. The structure of the circuit board and the assembly method in the pump shell 20 will not be described here. Of course, in other similar embodiments, the component to be cooled 30 can also be other components.

[0048] From the structure, one end of the heat-dissipating member 1 away from the mounting member 2 in the axial direction is provided with a first mounting portion 11, one end of the mounting member 2 away from the heat-dissipating member 1 is provided with a second mounting portion 21, the circuit board is connected with the heat-dissipating member 1 through the first mounting portion 11, and the pump shell 20 is connected with the mounting member 2 through the second mounting portion 21.

[0049] Specifically, taking the component to be cooled 30 as the circuit board for example, the side surface of the circuit board facing the first mounting portion 11 can be a smooth plane, or can be provided with a plurality of protrusions.

[0050] Specifically, the second mounting portion 21 extends radially outward to form a ring-shaped sealing lip, and the second mounting portion 21 can be welded to the pump shell 20 through the sealing lip to seal the connection between the pump shell 20 and the mounting member 2.

[0051] The sealing lip can have a certain thickness, and one side of the sealing lip in the axial direction is used to contact and fixedly connect with the pump shell 20.

[0052] In the embodiment, the mounting member 2 is made of plastic material to reduce the weight of the isolating sleeve 10 and achieve lightweight processing of the water pump 100. The mounting member 2 and the pump shell 20 can be assembled by ultrasonic welding. The heat dissipation member 1 is made of a material (for example, metal) having good heat conduction performance.

[0053] Referring to Figure 2 and Figure 4 , the heat dissipation member 1 and the mounting member 2 are fixedly connected.

[0054] The isolating sleeve 10 formed by the fixed connection of the heat dissipation member 1 and the mounting member 2 has a columnar or columnar-like structure. The heat dissipation member 1 is made of a heat-conducting material, which can be a heat-conducting metal such as copper or aluminum or other non-metallic material having good heat conduction performance, so that it can effectively transfer heat to achieve heat exchange. The mounting member 2 is made of plastic material and is used to realize the welding assembly between the isolating sleeve 10 and the pump shell 20. The heat dissipation member 1 and the mounting member 2 are connected in sequence along the axial direction and jointly form a complete isolating sleeve 10 structure, and are fixedly connected at the connection and kept sealed to prevent the cooling liquid from leaking at the connection.

[0055] The mounting member 2 made of plastic material not only helps to reduce the weight of the isolating sleeve 10, but also reduces the processing cost of the isolating sleeve 10 to some extent. Most importantly, the mounting member 2 made of plastic material can be directly fixedly connected with the pump shell 20 by welding when assembled, without the need for bolts and O-rings, which can further reduce the processing cost.

[0056] In the axial direction of the isolating sleeve 10, the axial dimensions of the heat dissipation member 1 and the mounting member can be adaptively adjusted according to the lightweight requirements of the water pump 100. When the water pump 100 has high cooling performance requirements, the axial dimension of the heat dissipation member 1 can be appropriately increased, and the axial dimension of the mounting member 2 can be appropriately reduced. When the water pump 100 has high lightweight requirements, the axial dimension of the mounting member 2 can be appropriately increased, and the axial dimension of the heat dissipation member 1 can be appropriately reduced.

[0057] In some embodiments, the heat dissipation member 1 is provided with a first mounting portion 11 at one end in the axial direction and a first connecting portion 12 at the other end, and the mounting member 2 is provided with a second mounting portion 21 at one end in the axial direction and a second connecting portion 22 at the other end. The heat dissipation member 1 and the mounting member 2 are fixedly connected through the first connecting portion 12 and the second connecting portion 22.

[0058] In some embodiments, the inner side wall of the heat dissipation member 1 and the inner side wall of the mounting member 2 are smoothly transitioned.

[0059] Specifically, the connection between the heat dissipation member 1 and the mounting member 2 is in a smooth transition form on the inner wall of the isolation sleeve 10, without protrusions, recesses, edges or steps, etc. This smooth transition form can make the connection interface between the heat dissipation member 1 and the mounting member 2 smooth and in a natural continuous state, thereby reducing the frictional resistance that may occur during the flow of the cooling liquid as much as possible, and helping to maintain a stable cooling liquid flow.

[0060] It should be noted that the free end faces of the first connecting portion 12 and the second connecting portion 22 provided on the heat dissipation member 1 and the mounting member 2, respectively, can be directly contacted and fixedly connected by pasting, or can be fixedly connected by clamping or embedding, etc.

[0061] For example, in some embodiments, the inner diameters of the first connecting portion 12 and the second connecting portion 22 are consistent, and the end of the first connecting portion 12 can be connected with the end of the second connecting portion 22. At this time, the first connecting portion 12 and the second connecting portion 22 can be connected by pasting.

[0062] Specifically, the radial thickness of the first connecting portion 12 is the same as the radial thickness of the second connecting portion 22, and the radial thickness of the first connecting portion 12 is the same as the radial thickness of the heat dissipation member 1.

[0063] In some embodiments, the heat dissipation member 1 and the mounting member 2 can be connected by pasting. In order to ensure the sealing effect, a sealing agent with good temperature change resistance and good hydrolysis resistance can be selected to bond the joint between the two. For example, polyurethane sealant, silicone sealant, etc. can be selected to bond the heat dissipation member 1 and the mounting member 2 to ensure that the connection between the two can remain sealed.

[0064] Specifically, after the ends of the first connecting portion 12 and the second connecting portion 22 are spliced together, the splicing gap formed is extremely small and can be filled and sealed by a sealing agent to ensure the sealing performance and reliability of the isolation sleeve 10 at the joint.

[0065] In some embodiments, the end of the first connecting portion 12 opposite to the first mounting portion 11 can be configured as a ring-shaped plane, and the end of the second connecting portion 22 configured to mate with the first connecting portion 12 can be configured as a ring-shaped plane matching the first connecting portion 12. In other similar embodiments, the end of the first connecting portion 12 opposite to the first mounting portion 11 can be configured as a surface with a unique irregular geometric shape (e.g. protrusions, recesses, curved profile, etc.), which can be composed of multiple bent planes or at least partially include curved surfaces. The end of the second connecting portion 22 configured to mate with the first connecting portion 12 can be configured with a matching irregular shape. The details of the end shapes of the first connecting portion 12 and the second connecting portion 22 can form a complementary relationship, so that when the heat dissipation member 1 and the mounting member 2 are assembled together, the first connecting portion 12 can be precisely inserted into the corresponding position of the second connecting portion 22, and the assembly can be achieved in a manner similar to a jigsaw. For the assembly gap between the two, the sealing can be achieved by pasting adhesive.

[0066] Alternatively, please refer to Figure 2 and Figure 4 The radial thickness of the first connecting portion 12 is less than the radial thickness of the second connecting portion 22, and the radial thickness of the first connecting portion 12 is less than the radial thickness of the heat dissipation member 1.

[0067] Specifically, the second connecting portion 22 can be configured to cover at least one of the axial end of the first connecting portion 12 and the radial inner side and the radial outer side of the first connecting portion 12 to seal the first connecting portion 12.

[0068] To ensure the assembly firmness of the heat dissipation member 1 and the mounting member 2, in the present embodiment, the second connecting portion 22 can be configured to cover both sides of the first connecting portion 12 in the radial direction to seal the first connecting portion 12. When the heat dissipation member 1 and the mounting member 2 are assembled together, the first connecting portion 12 is embedded in the second connecting portion 22.

[0069] Of course, in other similar embodiments, the radial thickness of the first connecting portion 12 can be greater than the radial thickness of the second connecting portion 22, and the radial thickness of the second connecting portion 22 can be less than the radial thickness of the mounting member 2. In this case, the first connecting portion 12 can be configured to cover and seal the second connecting portion 22. The relative size relationship between the first connecting portion 12 and the second connecting portion 22 can be adjusted as needed, and will not be described here.

[0070] The present embodiment takes the second connecting portion 22 covering the first connecting portion 12 as an example to specifically describe the structure of the connecting portion of the heat dissipation member 1 and the mounting member 2.

[0071] Please refer to Figure 2 and Figure 3The first connecting part 12 is provided with annular grooves 121 on at least one of the inner side and the outer side in the radial direction, and the second connecting part 22 is provided with annular protrusions 221 which are matched with the annular grooves 121, and the number of the annular protrusions 221 is the same as that of the annular grooves 121 and is arranged one by one.

[0072] In some embodiments, the number of the annular grooves 121 is at least two and is arranged in the axial direction of the heat dissipation member 1.

[0073] Specifically, the first connecting part 12 is provided with annular grooves 121 on both the inner side and the outer side in the radial direction, and the number of the annular grooves 121 on any one side is three. The three annular grooves 121 are arranged in the axial direction of the first connecting part 12 in sequence. The second connecting part 22 is provided with annular protrusions 221 which are matched with the above-mentioned annular grooves 121 on the corresponding positions. The above-mentioned annular grooves 121 and annular protrusions 221 are matched with each other, so as to realize the firm connection between the first connecting part 12 and the second connecting part 22.

[0074] The matched structure of the above-mentioned multiple annular protrusions 221 and annular grooves 121 forms multiple seals between the first connecting part 12 and the second connecting part 22, so as to enhance the sealing reliability between the heat dissipation member 1 and the mounting member 2.

[0075] In some embodiments, at least part of the surface of the annular groove 121 is curved.

[0076] For example, the cross-sectional shape of the annular groove 121 which is formed around the first connecting part 12 in the circumferential direction can be a semicircular groove with a specific radius, or can be a trapezoidal structure or other similar structures, please refer to Figure 3 The cross-sectional shape of the annular protrusion 221 is matched with that of the annular groove 121.

[0077] It should be noted that the structure design of the first connecting part 12 and the second connecting part 22 provides a certain compensation space for the expansion of the material. Because the materials of the mounting part 2 and the heat dissipation part 1 are different, the materials of the first connecting part 12 and the second connecting part 22 are also different, and thus there is a certain difference in the expansion degree when they are heated and expanded. With the cooperation of the plurality of annular protrusions 221 and the annular grooves 121 arranged at intervals, when the protrusion part is heated and expanded, the groove part on the corresponding other member can provide additional accommodation space for the expansion of the protrusion part, so as to avoid deformation and damage of the connecting part due to the heat expansion. Moreover, the plurality of annular grooves 121 and the annular protrusions 221 arranged at intervals can disperse the expansion in each local area, so as to avoid the case that the local pressure is too large; when cooling and shrinking, the volumes of the first connecting part 12 and the second connecting part 22 are both reduced, and the annular protrusions 221 and the annular grooves 121 arranged at intervals also help to maintain the sealing. Even if the shrinkage degrees of different materials are different, each annular protrusion 221 can still be in the corresponding annular groove 121 and maintain a certain contact. Because the plurality of protrusions and grooves are arranged at intervals, even if a slight gap appears between a certain protrusion and groove due to the shrinkage, the adjacent protrusion and groove can still contact each other and play a sealing role, so as to maintain the overall sealing effect. This dispersed structure design makes the first connecting part 12 and the second connecting part 22 not appear a large-area sealing gap due to the shrinkage of a certain place, can effectively improve the adaptability of the first connecting part 12 and the second connecting part 22 to the temperature change, reduce the influence of thermal expansion and cold contraction on the sealing performance of the isolation sleeve 10, and make the isolation sleeve 10 still maintain relatively reliable sealing performance under the complex working conditions of thermal expansion and cold contraction.

[0078] In other similar embodiments, a sealing ring 3 is arranged at the connecting part of the first connecting part 12 and the second connecting part 22.

[0079] The sealing ring 3 can be located on the inner side and / or the outer side of the first connecting part 12 in the radial direction, and can also be located on the end part of the first connecting part 12 in the axial direction.

[0080] Please refer to Figure 4 and Figure 5 The sealing ring 3 is arranged on the inner side of the first connecting part 12 in the radial direction, and the sealing ring 3 is an O-ring.

[0081] The number of the sealing ring 3 is at least one. When the number of the sealing ring 3 is two or even more, the plurality of sealing rings 3 can be arranged in sequence and at intervals in the axial direction of the first connecting part 12.

[0082] The first connecting part 12 is provided with an annular clamping groove for accommodating the sealing ring 3 on one of the inner side and the outer side in the radial direction. In Figure 4 and Figure 5In the above, the annular clamping groove is arranged at the radially inner side of the first connecting portion 12 and has a size matched with that of the sealing ring 3, so as to facilitate the installation of the sealing ring 3 on the first connecting portion 12 and realize the axial positioning of the sealing ring 3.

[0083] In some embodiments, the sealing ring 3 can also be fixedly connected with the heat dissipation member 1 by vulcanization of the sealing ring 3.

[0084] Specifically, the sealing ring 3 is made of rubber material and can be chemically modified by vulcanization to be fixedly connected with the heat dissipation member 1 made of metal material. The sealing ring 3 is vulcanized and fixed on the first connecting portion 12 of the heat dissipation member 1.

[0085] In order to realize the firm combination of the first connecting portion 12 and the second connecting portion 22, the heat dissipation member 1 and the mounting member 2 can be injection molded to be connected, at this time, the heat dissipation member 1 can be taken as a pre-embedded member, and the isolation sleeve 10 can be prepared by overmolding.

[0086] Specifically, the heat dissipation member 1 made of heat-conductive metal material constitutes a part of the isolation sleeve 10 and is used to provide certain structural support function and good heat conduction path, and the mounting member 2 having the second connecting portion 22 is formed by covering the first connecting portion 12 of the heat dissipation member 1 with high-temperature-resistant plastic.

[0087] In preparation, the heat dissipation member 1 can be taken as a pre-embedded member and placed in a corresponding injection mold, and appropriate plastic raw materials are selected, melted and injected into a mold cavity of the injection mold, so that the plastic is formed outside the first connecting portion 12 of the heat dissipation member 1 and forms the mounting member 2 which is tightly connected with the first connecting portion 12 and has the second connecting portion 22. After injection molding, demolding is performed to obtain the isolation sleeve 10. The heat dissipation member 1 can be provided with the sealing ring 3 according to sealing needs.

[0088] The heat dissipation member 1 and the mounting member 2 can be integrally formed by the above structure and combined with the injection molding process to prepare the isolation sleeve 10.

[0089] The injection molding process can refer to the description in the prior art, which will not be described here.

[0090] It can be understood that the isolation sleeve 10 provided by the embodiment of the present application can be prepared by the heat dissipation member 1 and the mounting member 2 which are sequentially distributed and fixedly connected in the axial direction, wherein the heat dissipation member 1 is prepared from a metal material or the like with good heat conduction performance, and the mounting member 2 is prepared from a plastic material or the like which can be welded and connected with the pump shell 20, so that the isolation sleeve 10 can take into account the water cooling performance and the assembly reliability, and the purpose of improving the use performance of the isolation sleeve 10 is achieved, and meanwhile the processing cost of the water pump 100 can be effectively reduced. In the isolation sleeve 10, the heat dissipation member 1 and the mounting member 2 can be fixedly connected through the first connecting portion 12 and the second connecting portion 22, and the influence of thermal expansion and cold shrinkage on the sealing performance of the isolation sleeve 10 can be overcome, so that the heat dissipation member 1 and the mounting member 2 prepared from different materials can still maintain the relatively optimal sealing performance when the temperature changes.

[0091] In the second aspect, the embodiment of the present application further provides a water pump 100, which comprises a pump shell 20 and the isolation sleeve 10 according to any one of the above.

[0092] In addition to the pump shell 20 and the isolation sleeve 10, the water pump 100 further comprises a pump shaft 40, a stator 60, a rotor 50 and a component to be cooled 30, wherein one end of the isolation sleeve 10 is connected with the pump shell 20, and the other end is arranged in the pump shell 20, at this time, the inner wall of the isolation sleeve 10 encloses to form a containing space for placing the pump shaft 40, the rotor 50 is connected with the pump shaft 40, and the outer wall of the isolation sleeve 10 and the pump shell 20 can enclose to form a containing space for placing the stator 60 and the component to be cooled 30.

[0093] The water pump 100 has the beneficial effects of the above-mentioned isolation sleeve 10, which will not be repeated here.

[0094] In the third aspect, the embodiment of the present application further provides a thermal management system, which can specifically comprise the above-mentioned water pump 100 and also has the above-mentioned beneficial effects, which will not be repeated here.

[0095] In the fourth aspect, the embodiment of the present application further provides a vehicle, which comprises the above-mentioned water pump 100 and / or comprises the above-mentioned thermal management system, and also has the above-mentioned beneficial effects, which will not be repeated here.

[0096] In the case that the above-mentioned vehicle is a fuel vehicle, the water pump 100 is usually arranged in front of the engine and close to the engine and the radiator. This position is convenient for the circulation of the coolant. Under the driving of the water pump 100, the coolant circulates and carries away the heat generated by the engine during operation, so as to maintain the engine in the appropriate working temperature range. The heat carried away by the water pump 100 can be dissipated through the radiator, or can be used for temperature control of other components such as the transmission, the air conditioning system and the like, so as to ensure the cooperative work of the systems of the vehicle and improve the reliability and comfort of the vehicle.

[0097] In the case that the vehicle is a new energy vehicle, the arrangement position of the water pump 100 is more flexible, which can be installed in the engine compartment (in the case that the vehicle has an engine, the water pump 100 can be arranged adjacent to the engine; in other cases, the water pump 100 can also be arranged adjacent to other heat generating components such as a motor, a controller, etc.), or arranged on a support of a vehicle longitudinal beam and a rear floor, etc. Under the driving of the water pump 100, the coolant circulates and carries away the heat generated by the engine, the motor, the controller and other heat generating components during operation, so as to avoid overheating and damage of the above components. The coolant carries the heat to the radiator under the driving of the water pump 100, and then returns to the above heat generating components, forming a circulating cooling system, so as to ensure that these key components always work in an appropriate temperature range, thereby ensuring the power performance of the vehicle and the stability of the electrical system. For the air conditioning system arranged on the vehicle, the water pump 100 can be used to improve the comfort of the vehicle: in the heating mode, the water pump 100 can drive the coolant to obtain heat from the heat pump system or the electric heating device of the vehicle, and transfer the heat to the heat exchanger in the vehicle cabin, and then the fan blows the hot air into the vehicle cabin to provide a warm environment for the passengers; in the cooling mode, the water pump 100 can transfer the heat in the vehicle to the condenser outside the vehicle to dissipate heat, thereby reducing the temperature in the vehicle.

[0098] The above description of the various embodiments is intended to emphasize the differences between the various embodiments, and the same or similar parts can be referred to each other, which will not be described herein for the sake of brevity.

[0099] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An isolation sleeve applied to a water pump, the water pump having a pump casing, characterized in that, The isolation sleeve has a cylindrical structure and includes a heat dissipation component and a mounting component distributed along the axial direction. The heat dissipation component and the mounting component are connected. The heat dissipation component is used to connect with the component to be cooled to achieve heat exchange, and the mounting component is used to seal the connection with the pump housing.

2. The isolation sleeve according to claim 1, characterized in that, The heat sink is provided with a first mounting part at one axial end, and the mounting part is provided with a second mounting part at one axial end. The component to be cooled is connected to the heat sink via the first mounting part, and the pump housing is connected to the mounting part via the second mounting part.

3. The isolation sleeve according to claim 2, characterized in that, The heat sink is provided with a first connecting part at the other end of its axial direction, and the mounting part is provided with a second connecting part at the other end of its axial direction. The heat sink and the mounting component are fixedly connected by the first connecting part and the second connecting part, and the inner wall of the heat sink and the inner wall of the mounting component are smoothly connected.

4. The isolation sleeve according to claim 3, characterized in that, The radial thickness of the first connecting portion is less than or equal to the radial thickness of the heat sink; The second connecting part is sleeved on the first connecting part to seal the first connecting part, or the first connecting part is sleeved on the second connecting part to seal the second connecting part.

5. The isolation sleeve according to claim 3, characterized in that, The first connecting part has an annular groove on at least one of its radial inner side and radial outer side, and the second connecting part has an annular protrusion that mates with the annular groove. The number of the annular protrusions is the same as the number of the annular grooves and they are arranged in a one-to-one correspondence.

6. The isolation sleeve according to claim 5, characterized in that, The number of the annular grooves is at least two and they are arranged at intervals along the axial direction of the heat sink. And / or, at least a portion of the surface of the annular groove is curved.

7. The isolation sleeve according to any one of claims 3-6, characterized in that, A sealing ring is provided at the connection between the first connecting part and the second connecting part. The sealing ring is a rubber sealing ring that is vulcanized and fixed to the first connecting part.

8. A water pump, characterized in that, It includes a pump housing and an isolation sleeve, wherein the isolation sleeve is the isolation sleeve according to any one of claims 1-7.

9. A thermal management system, characterized in that, Includes the water pump as described in claim 8.

10. A vehicle, characterized in that, Includes the water pump as described in claim 8.

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