Stator liquid cooling flow channel, liquid cooling stator and liquid cooling motor

Abstract

The utility model discloses a stator liquid cooling flow channel, a liquid cooling stator and a liquid cooling motor, the liquid cooling flow channel comprises an annular pipe, one end of which is provided with a flow channel inlet pipe; one end of the winding pipe is connected with the annular pipe, and the other end of the winding pipe is provided with a runner outlet; the winding pipe passes through a plurality of stator slots which are distributed along the circumference; the liquid cooling flow channel can cool the winding and the iron core at the same time, and the problem of heating caused by copper loss and iron loss of the motor is solved. According to the utility model, a complex flow channel does not need to be additionally designed, and the heat dissipation structure does not occupy the design space of other parts. The cooling flow channel is closer to a heat source, the heat conduction path is short, the heat resistance is reduced, the heat conductivity coefficient is improved, and the cooling efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of liquid-cooled motors, and in particular to a stator liquid-cooled flow channel. Background Technology

[0002] Liquid-cooled motors encompass various types, including water-cooled and oil-cooled motors. Water-cooling involves designing flow channels in the casing structure to allow water to flow and exchange heat. This method requires additional cooling structures, which negatively impacts manufacturing costs, strength imbalances, and maintenance costs. It also results in a complex mechanical structure and requires consideration of sealing issues. Oil-cooling, on the other hand, involves directly inserting oil into the ends of the motor windings. This leads to a complex oil circuit structure. An improperly designed oil circuit can cause uneven distribution of cooling oil within the motor, resulting in uneven temperature rise and localized overheating. This requires significant design and manufacturing complexity, and ensuring proper sealing is challenging. These solutions are unsuitable for applications such as electrically driven legged robots, where extremely lightweight and miniaturized motors are required. Utility Model Content

[0003] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of this section, the abstract and the title of this utility model. Such simplifications or omissions shall not be used to limit the scope of this utility model.

[0004] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0005] Therefore, the technical problem to be solved by this utility model is that the existing heat dissipation method requires the addition of a cooling structure, which will adversely affect the processing cost, strength imbalance, maintenance cost, etc.

[0006] To solve the above-mentioned technical problems, in a first aspect, the present invention provides the following technical solution: a stator liquid cooling channel, comprising an annular tube, one end of which is provided with a channel inlet pipe;

[0007] A spiral tube, one end of which is connected to the annular tube, and the other end of which is provided with a flow channel outlet;

[0008] The winding tube passes through several stator slots distributed along the circumference.

[0009] As a preferred embodiment of the stator liquid cooling channel of this utility model, the winding tube includes a plurality of short tubes arranged in a ring array, and the plurality of short tubes are distributed in each stator slot;

[0010] The short pipes are connected end to end to form a flow channel, except for one end connected to the annular pipe and one end provided with a flow channel outlet.

[0011] As a preferred scheme of the stator liquid cooling flow channel, the annular pipe is arranged around the iron core.

[0012] As a preferred scheme of the stator liquid cooling flow channel, the short pipes are connected by the bent pipes.

[0013] As a preferred scheme of the stator liquid cooling flow channel, the bent pipes are bent towards the direction of the stator shaft center.

[0014] As a preferred scheme of the stator liquid cooling flow channel, the flow channel outlet is connected with an outlet pipe, and the outlet pipe is arranged in parallel with the inlet pipe.

[0015] In a second aspect, the utility model provides the following technical scheme: a liquid cooling stator, wherein:

[0016] Further comprising a plurality of stator iron cores, a stator slot is formed between two adjacent stator iron cores, and the winding pipe passes through a plurality of circumferentially distributed stator slots.

[0017] As a preferred scheme of the liquid cooling stator, further comprising a heat-conducting pouring sealant, and the heat-conducting pouring sealant pours and seals the above liquid cooling flow channel at the outer periphery of the stator.

[0018] As a preferred scheme of the stator liquid cooling flow channel, the annular pipe is located at one end surface of the iron core of the liquid cooling stator.

[0019] In a third aspect, the utility model provides the following technical scheme: a liquid cooling motor comprising the liquid cooling stator.

[0020] The utility model has the advantages of:

[0021] 1. The winding and the iron core can be cooled simultaneously, and the heating problem caused by copper loss and iron loss of the motor is solved.

[0022] 2. No additional complex flow channel needs to be designed, and the heat dissipation structure does not occupy the design space of other components.

[0023] 3. The cooling flow channel is closer to the heat source, the heat conduction path is short, the thermal resistance is reduced, the heat conduction coefficient is improved, and the cooling efficiency is improved.

[0024] 4. The cooling mode is easier to ensure the sealing property compared with other cooling modes, and the production and manufacturing difficulty is low. BRIEF DESCRIPTION OF DRAWINGS

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0026] Figure 1 A schematic diagram of the stator liquid cooling channel according to an embodiment of this utility model;

[0027] Figure 2 A schematic diagram of the stator liquid cooling channel according to another embodiment of this utility model;

[0028] Figure 3 A top view schematic diagram of the stator liquid cooling channel according to an embodiment of this utility model;

[0029] Figure 4 A schematic diagram of the structure of a liquid-cooled stator according to an embodiment of this utility model;

[0030] Figure 5 A schematic diagram of the inlet and outlet direction views of the liquid-cooled stator flow channel according to an embodiment of this utility model;

[0031] Figure 6 A schematic diagram of the back side of the liquid-cooled stator according to another embodiment of this utility model;

[0032] Figure 7 A schematic diagram of the structure of a liquid-cooled stator according to an embodiment of this utility model;

[0033] Figure 8 A schematic diagram of the structure of the motor according to another embodiment of the present invention;

[0034] Figure 9 This is an exploded structural diagram of the motor according to one embodiment of the present invention. Detailed Implementation

[0035] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Second, the utility model is described in detail in combination with the schematic diagram, in the detailed description of the utility model embodiment, for the convenience of illustration, the section view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of the utility model protection here. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0038] Thirdly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the utility model. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0039] Referring to Figure 1 , the stator liquid cooling flow channel is a complete pipeline, which is formed by bending a whole copper pipe, and some other materials can also achieve similar effects, which are not limited here.

[0040] It should be noted that the inner rotor motor is taken as an example in the embodiment, but it is not limited to the inner rotor motor, and the motor with stator slots can also use the stator liquid cooling flow channel, such as the outer rotor motor, which is not limited here.

[0041] In some embodiments, referring to Figure 1 , the stator liquid cooling flow channel includes a ring pipe 100 and a winding pipe 200, and the ring pipe 100 and the winding pipe 200 are formed by bending a whole copper pipe, which reduces the number of parts, simplifies the processing flow, and reduces the strength risk caused by part connection.

[0042] Among them, the ring pipe 100 is provided with a flow channel inlet pipe 101 at one end, and the inlet pipe 101 can be one end of the ring pipe 100 or an external pipeline, which is not limited here. That is, the ring pipe 100 makes the liquid cooling flow channel inlet first wrap around the core to preliminarily cool the motor as a whole, and then further cool in the motor slot, so as to avoid too large temperature difference of the liquid cooling inlet and outlet and fully cool the winding.

[0043] Among them, the winding pipe 200 is connected with the ring pipe 100 at one end, and the other end is provided with a flow channel outlet 201, and the flow channel outlet 201 can be one end of the winding pipe 200 or an external pipeline, which is not limited here.

[0044] The winding pipe 200 passes through a plurality of stator slots distributed along the circumference. The stator slot is a gap between a plurality of stator cores on the stator motor, and the cores have windings; that is, the winding pipe 200 is wound in an S shape or a snake shape, and the cooling flow channel is closer to the heat source and has a short heat conduction path. The liquid cooling flow channel is snakelike in the stator slot, so that the distance between the cooling flow channel and the heat source (winding and core) is significantly shortened. According to the principle of heat conduction, the shorter the heat conduction path, the smaller the thermal resistance, and the faster the heat transfer. This design maximizes the loss of heat in the transmission process, improves the thermal conductivity, and enables the motor to dissipate heat more efficiently.

[0045] In some embodiments, for the convenience of understanding, the structure of the winding pipe 200 is exploded and divided, and the winding pipe 200 includes a plurality of annular arrays of short pipes 202, and a plurality of short pipes 202 are distributed in each stator slot; a plurality of short pipes 202 are connected end to end except one end connected to the annular pipe 100 and one end provided with the flow channel outlet 201, that is, the short pipes 202 are connected end to end and not form a closed loop of the winding pipe 200, but the winding pipe 200 is connected end to end except one end and the other end is connected to the annular pipe 100 and the flow channel outlet 201 respectively.

[0046] In some embodiments, referring to Figure 2 , the annular pipe 100 is arranged around the core. The cage type liquid cooling flow inlet is wound around the core once to preliminarily cool the motor as a whole, and then deeply into the motor slot for cooling, so as to avoid too large temperature difference of the liquid cooling inlet and outlet and also to sufficiently cool the winding.

[0047] In some embodiments, referring to Figures 2-3 , the short pipes 202 are connected by the bent pipes 203 between the short pipes 202, and the bent pipes 203 are bent towards the stator axis, so that the liquid cooling flow channel is lengthened, and the area covered by the winding and the time flowing through the winding are both increased.

[0048] In some embodiments, referring to Figure 2 , the flow channel outlet 201 is connected with an outlet pipe 201a, the outlet pipe 201a is arranged parallel to the inlet pipe 101, and the outlet pipe 201a is connected with a pipeline outside the motor.

[0049] In some embodiments, referring to Figures 4-6 , a liquid-cooled stator includes the above-mentioned stator liquid cooling flow channel; wherein the liquid-cooled stator includes a plurality of stator cores 300, the core 300 includes an annular structure and a winding core distributed along the circumference of the annular structure, a stator slot 301 is formed between two adjacent stator cores 300, the winding pipe 200 passes through a plurality of stator slots 301 distributed along the circumference, and deeply into the motor slot for cooling.

[0050] In some embodiments, a heat-conducting potting glue 400 is further included, which fills the liquid cooling flow channel in the outer periphery of the stator, that is, the whole copper tube is bent to form a cage type liquid cooling flow channel, and then the heat-conducting potting glue is injected into the whole stator, which is easy to process and has good sealing performance. The liquid cooling flow channel of the stator effectively plans the flow path of the cooling liquid, and ensures that the cooling liquid is uniformly distributed in the motor, and the windings and the core are comprehensively and evenly cooled.

[0051] In some embodiments, referring to Figure 7 The flow channel is combined with the stator, and the heat-conducting potting glue is injected after combination, so that the three form an organic whole. The heat-conducting potting glue plays multiple key roles here: it fills the small gaps that may exist between the flow channel and the stator, greatly improves the heat conduction efficiency, and ensures that heat can be quickly transferred from the heat-emitting stator and windings to the cooling liquid in the flow channel; at the same time, the potting glue can also enhance the structural strength of the stator after solidification, prevent the parts from loosening or being damaged due to factors such as vibration, thermal expansion and contraction during motor operation, and improve the overall stability and reliability of the motor; such integrated design not only optimizes the heat dissipation performance, but also enhances the structural strength of the motor without adding too much additional weight, and well balances the demand for light weight and high strength.

[0052] In some embodiments, the annular tube 100 is located at one end surface of the core of the liquid-cooled stator. The cooling liquid is first wound around the core to preliminarily cool the whole motor, and then deeply enters the motor slot to avoid too large temperature difference when the cooling liquid enters and exits the liquid cooling port and can also fully cool the windings; the unique step-by-step cooling path, that is, the flow channel inlet is first wound around the core and then deeply enters the motor slot. This way considers the heating characteristics and heat dissipation demand of different parts inside the motor. The core is an important part of the magnetic circuit of the motor, and a large amount of heat is generated during the operation of the motor. Preliminary cooling of the core can effectively reduce the overall temperature and create more favorable conditions for subsequent deep cooling of the windings.

[0053] At the same time, this step-by-step cooling method avoids too large temperature difference of the cooling liquid when it enters and exits the liquid cooling port, thereby improving the utilization efficiency of the cooling liquid and ensuring the stability and effectiveness of the whole cooling process.

[0054] In some embodiments, referring to Figures 8-9 A liquid-cooled motor includes the above-mentioned liquid-cooled stator, which has simple structure, simple production and manufacturing, can maintain light weight while maintaining strength, and has long service life.

[0055] In addition, in order to provide a brief description of the exemplary embodiments, all features of the actual embodiments (i.e., those unrelated to the currently considered best mode of carrying out the present application, or those unrelated to the implementation of the present application) can not be described.

[0056] It is to be understood that the development of the particular implementations described herein was not determined merely by the availability of certain items or materials. Rather and more generally, specific implementations were developed to provide implementations that are functionally, economically, and / or esthetically practical, in light of ongoing technological changes having economic, business, and / or social consequences.

[0057] It should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application. They should be covered in the scope of the claims of the present application.

Claims

1. A stator liquid cooling runner characterized by: Comprising, a ring pipe (100) provided with a flow passage inlet pipe (101) at one end thereof; a winding pipe (200) connected with the ring pipe (100) at one end thereof and provided with a flow passage outlet (201) at the other end thereof; the winding pipe (200) passes through a plurality of stator slots distributed along the circumference.

2. The stator liquid cooling runner of claim 1, wherein: the winding pipe (200) comprises a plurality of annular arrays of short pipes (202), and a plurality of the short pipes (202) are distributed in each stator slot; a plurality of the short pipes (202) are connected end to end to form a flow passage except for the end connected with the ring pipe (100) and the end provided with the flow passage outlet (201).

3. The stator liquid cooling gallery of claim 2, wherein: the ring pipe (100) is arranged around the core.

4. The stator liquid cooling gallery of claim 3, wherein: the short pipes (202) are connected with each other through bent pipes (203).

5. The stator liquid cooling channel of claim 4, wherein: the bent pipes (203) are bent towards the stator axis.

6. The stator liquid cooling channel according to any one of claims 2, 4, 5, characterized in that: the flow passage outlet (201) is connected with an outlet pipe (201a) arranged in parallel with the inlet pipe (101).

7. A liquid-cooled stator characterized by: it comprises the stator liquid cooling flow passage according to any one of claims 1-6; it further comprises a plurality of stator cores (300), and a stator slot (301) is formed between two adjacent stator cores (300), and the winding pipe (200) passes through a plurality of stator slots (301) distributed along the circumference.

8. The liquid-cooled stator of claim 7, wherein: it further comprises a heat-conducting pouring sealant (400) for pouring and sealing the liquid cooling flow passage around the stator.

9. Liquid-cooled stator according to claim 7 or 8, characterized in that: the ring pipe (100) is located at one end surface of the core of the liquid cooling stator.

10. A liquid-cooled electric machine characterized by: it comprises the liquid cooling stator according to any one of claims 7-9.

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