Motor stator and motor having the same

Abstract

The present invention relates to the technical field of motors, and specifically discloses a motor stator and a motor having the same; the motor stator comprises a stator body and a liquid inlet and distribution mechanism, a liquid confluence and outlet mechanism, a plurality of first cooling channels and a plurality of second cooling channels arranged on the stator body; the liquid inlet and distribution mechanism distributes the cooling liquid to the first cooling channel and the second cooling channel, and the first cooling channel and the second cooling channel are both installed on the stator body at intervals along the axial direction of the stator, that is, the cooling paths of the first cooling channel and the second cooling channel are not arranged along the axial direction of the stator, but are arranged along the circumferential direction of the stator, and the cooling liquid is collected and discharged through the liquid confluence and outlet mechanism after cooling, and the structure can ensure that the temperature difference at the two axial ends of the stator after cooling is similar or the same, thereby improving the cooling effect and ensuring the motor performance.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a motor stator and a motor having the same. Background Art

[0002] After running for a period of time, the motor will generate heat, which will affect the working efficiency of the motor. Therefore, the motor is generally cooled by air or water. The structure of the existing water-cooled motor is usually to insert a shell with a groove on the outside of the motor stator core, and the groove on the shell is annular or spiral. Then, a wrapping shell is inserted on the outside of the shell, and an annular or spiral cooling channel is formed in the groove between the two shells; the cooling channel is used to circulate the coolant, and the coolant inlet end is set at one end of the stator, and the outlet end is set at the other end of the stator.

[0003] Although there are many structural forms of the cooling channel of the existing stator, its essence is that the coolant flows axially from the liquid inlet end to the liquid outlet end in the cooling channel, and has a very long flow path. During the flow of the coolant, the temperature gradually increases and the cooling capacity gradually decreases, making the temperature of the motor outlet end much higher than the temperature of the water inlet end, resulting in a large temperature difference between the two ends of the motor stator, poor cooling effect, and affecting the motor performance. Summary of the invention

[0004] The first purpose of the present invention is to provide a motor stator to solve the problem that the existing motor stator has poor cooling effect and affects the motor performance.

[0005] To achieve the above purpose, the technical solution proposed by the present invention is as follows:

[0006] A motor stator comprises a stator body, on which a liquid inlet and distribution mechanism, a liquid confluence and outlet mechanism, a first cooling channel and a second cooling channel are arranged; the length directions of the liquid inlet and distribution mechanism and the liquid confluence and outlet mechanism are consistent with the axial direction of the stator body, and a preset distance is provided between the liquid inlet and distribution mechanism and the liquid confluence and outlet mechanism; two ends of the first cooling channel are respectively connected to the liquid inlet and distribution mechanism and the liquid confluence and outlet mechanism, and a plurality of the first cooling channels are arranged at intervals along the axial direction of the stator body on one side of the stator body; two ends of the second cooling channel are respectively connected to the liquid inlet and distribution mechanism and the liquid confluence and outlet mechanism, and a plurality of the second cooling channels are arranged at intervals along the axial direction of the stator body on the other side of the stator body.

[0007] According to the motor stator provided by the present invention, the liquid inlet distribution mechanism distributes the cooling liquid to the first cooling channel and the second cooling channel. The first cooling channel and the second cooling channel are both installed on the stator body along the axial direction of the stator at intervals, that is, the cooling paths of the first cooling channel and the second cooling channel are not arranged along the axial direction of the stator, but along the circumferential direction of the stator. After cooling, the cooling liquid is collected and discharged through the liquid converging mechanism. This structure can ensure that the temperature difference at the two axial ends of the stator after cooling is similar or the same, thereby improving the cooling effect and ensuring the motor performance.

[0008] In addition, the motor stator according to the above embodiment of the present invention may also have the following additional technical features:

[0009] According to an example of the present invention, the liquid inlet and distribution mechanism includes a first tube body and a second tube body arranged side by side, and the first tube body and the second tube body are both provided with a liquid inlet; one end of the first cooling channel is connected to the first tube body, and the other end is connected to the liquid confluence and discharge mechanism; one end of the second cooling channel is connected to the second tube body, and the other end is connected to the liquid confluence and discharge mechanism.

[0010] According to an example of the present invention, the liquid inlet is provided in the middle of the first tube body, and / or the liquid inlet is provided in the middle of the second tube body.

[0011] According to an example of the present invention, the liquid confluence and discharge mechanism includes a third tube body and a fourth tube body arranged side by side, and the third tube body and the fourth tube body are both provided with a liquid outlet; one end of the first cooling channel is connected to the first tube body, and the other end is connected to the third tube body; one end of the second cooling channel is connected to the second tube body, and the other end is connected to the fourth tube body.

[0012] According to an example of the present invention, the liquid outlet is provided in the middle of the third tube body, and / or the liquid outlet is provided in the middle of the fourth tube body.

[0013] According to an example of the present invention, the liquid inlet distribution mechanism and the liquid outlet confluence mechanism are arranged relative to the axis of the stator body.

[0014] According to an example of the present invention, the plurality of first cooling channels and the plurality of second cooling channels are symmetrically arranged with respect to an axis of the stator body.

[0015] According to an example of the present invention, a plurality of the first cooling channels are arranged at even intervals, and / or a plurality of the second cooling channels are arranged at even intervals.

[0016] According to an example of the present invention, a plurality of first cooling pipes are installed on one side of the stator body, and the first cooling channel is provided in the first cooling pipe; and / or a plurality of second cooling pipes are installed on the other side of the stator body, and the second cooling channel is provided in the second cooling pipe.

[0017] According to an example of the present invention, the stator body includes a plurality of first iron cores and a plurality of second iron cores; the radial dimension of the first iron cores is greater than the radial dimension of the second iron cores; at least one second iron core is provided between two adjacent first iron cores, and two adjacent first iron cores and the second iron core therebetween form a receiving groove, and the first cooling tube and the second cooling tube are installed in the receiving groove.

[0018] According to an example of the present invention, in the axial direction of the stator body, a plurality of the first cores and a plurality of the second cores are alternately arranged, and adjacent first cores and second cores are connected.

[0019] According to an example of the present invention, a first platform is provided on the outer edge of one side of the first iron core, and a plurality of first platforms are arranged side by side to form a first mounting platform, and the liquid inlet distribution mechanism is installed on the first mounting platform; and / or, a second platform is provided on the outer edge of the other side of the first iron core, and a plurality of second platforms are arranged side by side to form a second mounting platform, and the liquid confluence and discharge mechanism is installed on the second mounting platform.

[0020] The second object of the present invention is to provide a motor having a motor stator as described in any one of the above technical solutions.

[0021] The advantages of the above additional aspects will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a motor stator according to an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the coolant flow of the motor stator according to an embodiment of the invention (I);

[0024] Figure 3 Schematic diagram of the coolant flow of the motor stator according to the embodiment of the invention (II);

[0025] Figure 4 An exploded diagram of a motor stator according to an embodiment of the present invention;

[0026] Figure 5 Schematic diagram of the internal structure of the motor stator according to an embodiment of the present invention (I);

[0027] Figure 6Schematic diagram of the internal structure of the motor stator according to an embodiment of the present invention (II);

[0028] Figure 7 Schematic diagram of the structure of the stator body according to an embodiment of the present invention.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 100, stator body; 110, first iron core; 111, first platform; 112, second platform; 120, second iron core; 200, liquid inlet and distribution mechanism; 210, first tube body; 220, second tube body; 230, liquid inlet; 300, liquid confluence and outlet mechanism; 310, third tube body; 320, fourth tube body; 330, liquid outlet; 400, first cooling pipe; 410, first cooling channel; 500, second cooling pipe; 510, second cooling channel. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] Combined with Figure 1-6 As described above, this embodiment provides a motor stator, including a stator body 100 and a liquid inlet distribution mechanism 200 , a converging liquid storage mechanism 300 , a plurality of first cooling channels 410 , and a plurality of second cooling channels 510 disposed on the stator body 100 .

[0033] The liquid inlet distribution mechanism 200 of this embodiment is used to connect the liquid inlet pipeline (not shown in the figure) and distribute the coolant to the above-mentioned first cooling channel 410 and second cooling channel 510; the confluence storage mechanism 300 of this embodiment is used to converge the coolant after completing the cooling work and discharge it to the coolant discharge pipeline or the coolant recovery pipeline (not shown in the figure).

[0034] The length directions of the liquid inlet distribution mechanism 200 and the confluence liquid storage mechanism 300 of this embodiment are consistent with the axial direction of the stator body 100, ensuring that the first cooling channel 410 and the second cooling channel 510 located in the liquid inlet distribution mechanism 200 and the confluence liquid storage mechanism 300 can be arranged along the axial direction of the stator body 100 and directly connected to the above two.

[0035] In this embodiment, there is a preset distance between the liquid inlet distribution mechanism 200 and the confluence liquid storage mechanism 300. Preferably, the liquid inlet distribution mechanism 200 and the confluence liquid storage mechanism 300 are arranged relative to the axis of the stator body 100. It can be understood that the liquid inlet distribution mechanism 200 is arranged on one of the two opposite sides of the stator body 100, and the confluence liquid storage mechanism 300 is arranged on the other side of the two opposite sides of the stator body 100. This structure can ensure that the lengths of the first cooling channel 410 and the second cooling channel 510 located between the liquid inlet distribution mechanism 200 and the confluence liquid storage mechanism 300 are the same or similar, thereby making the cooling paths on both sides of the stator body 100 consistent, and can extremely shorten the cooling path of the cooling pipe, thereby improving the cooling effect.

[0036] In the present embodiment, a plurality of first cooling channels 410 are installed at intervals along the axial direction of the stator body 100 on one side of the stator body 100, and opposite ends of the first cooling channels 410 are respectively connected to the liquid inlet distribution mechanism 200 and the confluence liquid storage mechanism 300; similarly, a plurality of second cooling channels 510 in the present embodiment are installed at intervals along the axial direction of the stator body 100 on the other side of the stator body 100, and opposite ends of the second cooling channels 510 are respectively connected to the liquid inlet distribution mechanism 200 and the confluence liquid storage mechanism 300; it should be noted that the structures of the first cooling channels 410 and the second cooling channels 510 in the present embodiment can be the same or similar, and the two together cover the stator body 100 for cooling, and based on the above-mentioned arrangement of the liquid inlet distribution mechanism 200 and the confluence liquid storage mechanism 300, the first cooling channels 410 and the second cooling channels 510 in the present embodiment have the same cooling path, which is approximately half of the circumference of the stator body 100, thereby ensuring the same cooling effect on both sides of the stator body 100.

[0037] In combination with the above structural description, it can be known that the motor stator of this embodiment distributes the coolant to the first cooling channel 410 and the second cooling channel 510 through the liquid inlet distribution mechanism 200. The first cooling channel 410 and the second cooling channel 510 are both installed on the stator body 100 along the axial direction of the stator at intervals, that is, the cooling paths of the first cooling channel 410 and the second cooling channel 510 are not arranged along the axial direction of the stator, but along the circumferential direction of the stator. After cooling, the coolant is collected and flows out through the converging liquid storage mechanism 300. This structure can ensure that the temperature difference at the two axial ends of the stator after cooling is similar or the same, thereby improving the cooling effect and ensuring the motor performance.

[0038] Based on the above structure, the inventors found that the existing motor cooling structure is generally to insert a shell with a groove on the outside of the motor stator core, the groove on the shell is annular or spiral, and then insert a wrapping shell on the outside of the shell, and form a cooling channel in the groove between the two shells to flow the coolant through. Therefore, a sealing design is required between the two shells. The sealing design generally uses an O-ring, which will increase the difficulty of assembly between the two shells, and the sealing effect is not easy to guarantee. Due to the aging of the sealing ring, there is also a problem of long-term reliability of the sealing effect.

[0039] Therefore, this embodiment also makes improvements to the structures of the liquid inlet distribution mechanism 200 , the converging liquid storage mechanism 300 , the first cooling channel 410 , and the second cooling channel 510 .

[0040] First, the liquid inlet distribution mechanism 200 of the present embodiment is designed to include a first tube body 210 and a second tube body 220 arranged side by side, and the first tube body 210 and the second tube body 220 are both provided with a liquid inlet 230; the confluence liquid storage mechanism 300 of the present embodiment is designed to include a third tube body 310 and a fourth tube body 320 arranged side by side, and the third tube body 310 and the fourth tube body 320 are both provided with a liquid outlet 330.

[0041] Furthermore, a plurality of first cooling pipes 400 are installed on one side of the stator body 100, and the first cooling channels 410 are provided in the first cooling pipes 400; and a plurality of second cooling pipes 500 are installed on the other side of the stator body 100, and the second cooling channels 510 are provided in the second cooling pipes 500. The first cooling pipes 400 and the second cooling pipes 500 are arc-shaped pipes, and the plurality of first cooling pipes 400 are parallel to each other, and the plurality of second cooling pipes 500 are parallel to each other, and the curvature thereof is adapted to the outer circumference of the stator body 100, and specifically, the curvature of the first cooling pipes 400 and the second cooling pipes 500 is approximately a semicircle.

[0042] By designing the liquid inlet distribution mechanism 200, the converging liquid storage mechanism 300, the first cooling channel 410 and the second cooling channel 510 as tube bodies, a sealing design is avoided, and the reliability of the cooling structure is greatly improved.

[0043] Moreover, in this structure, since the first tube body 210 and the second tube body 220 are not connected, and similarly, the third tube body 310 and the fourth tube body 320 are not connected, it can be regarded that the first tube body 210, the first cooling tube 400 and the third tube body 310 form a cooling pipeline, and the second tube body 220, the second cooling tube 500 and the fourth tube body 320 form another cooling pipeline. The two cooling pipelines can be disassembled for easy installation on the stator core, and its installation convenience is better than the entire sleeve-type structure being mounted on the stator core.

[0044] Specifically, one end of each first cooling tube 400 of this embodiment is connected to the first tube body 210 , and the other end is connected to the third tube body 310 ; one end of each second cooling tube 500 is connected to the second tube body 220 , and the other end is connected to the fourth tube body 320 .

[0045] Preferably, a liquid inlet 230 is provided in the middle of the first tube body 210 of this embodiment, and a liquid inlet 230 is provided in the middle of the second tube body 220, which not only facilitates the uniform distribution of the coolant to each first cooling tube 400 and each second cooling tube 500, but also ensures that the time for the coolant to flow to the axial ends of the stator body 100 is basically the same, ensuring that the cooling effect at both ends of the stator body 100 is basically the same.

[0046] More preferably, a liquid outlet 330 is provided in the middle of the third tube body 310 of the present embodiment, and a liquid outlet 330 is provided in the middle of the fourth tube body 320 of the present embodiment, to ensure that the two liquid inlets 230 and the two liquid outlets 330 can be symmetrically arranged with respect to the stator body 100, respectively, and the coolant in each cooling tube has the same flow path and outflow time at both ends of the stator, further ensuring that the cooling effect at both ends of the stator body 100 is the same.

[0047] In this embodiment, the multiple first cooling channels 410 and the multiple second cooling channels 510 are symmetrically arranged about the axis of the stator body 100, or in other words, the multiple first cooling tubes 400 and the multiple second cooling tubes 500 are symmetrically arranged about the axis of the stator body 100, that is, the two are the same in number and correspond to each other in space, thereby ensuring the uniformity of the cooling effect on both sides of the stator body 100.

[0048] In order to ensure that each position of the stator body 100 can have a uniform and good cooling effect, the present embodiment arranges the multiple first cooling channels 410 at uniform intervals, and the multiple second cooling channels 510 at uniform intervals, or the first cooling tubes 400 at uniform intervals, and the multiple second cooling tubes 500 at uniform intervals.

[0049] The flow of the coolant on the stator body 100 of the above structure is as follows: Figure 2 and 3 As shown by the arrows in , first, the coolant enters the first tube body 210 and the second tube body 220 through the liquid inlet 230, and is evenly distributed to each of the first cooling tubes 400 and the second cooling tubes 500. The coolant then flows circumferentially in the first cooling tube 400 and the second cooling tube 500. The coolant after cooling in the first cooling tube 400 eventually converges into the third tube body 310. Similarly, the coolant after cooling in the second cooling tube 500 eventually converges into the fourth tube body 320, and is finally discharged through the liquid outlets 330 of the third tube body 310 and the fourth tube body 320, completing the entire cooling process.

[0050] Based on the above pipeline structure, in order to facilitate the installation of the first cooling pipe 400 and the second cooling pipe 500 , the present embodiment further improves the structure of the stator body 100 .

[0051] Combined with Figure 5-7 As shown, the stator body 100 of this embodiment includes multiple first iron cores 110 and multiple second iron cores 120; the radial dimension of the first iron core 110 is greater than the radial dimension of the second iron core 120; at least one second iron core 120 is provided between two adjacent first iron cores 110, and the two adjacent first iron cores 110 and the second iron core 120 therebetween form a receiving groove, and the first cooling tube 400 and the second cooling tube 500 are installed in the receiving groove.

[0052] Preferably, in the axial direction of the stator body 100 , the plurality of first cores 110 and the plurality of second cores 120 of this embodiment are alternately arranged, and adjacent first cores 110 and second cores 120 are connected to ensure the uniformity of the number and size of the accommodating grooves.

[0053] In order to facilitate the installation of the first tube body 210, the second tube body 220, the third tube body 310 and the fourth tube body 320, in this embodiment, a first platform 111 is provided on the outer edge of one side of the first iron core 110, and a plurality of first platforms 111 are arranged side by side to form a first mounting platform, and the liquid inlet distribution mechanism 200 (the first tube body 210 and the second tube body 220) is installed on the first mounting platform; similarly, a second platform 112 is provided on the outer edge of the other side of the first iron core 110, and a plurality of second platforms 112 are arranged side by side to form a second mounting platform, and the confluence liquid storage mechanism 300 (the third tube body 310 and the fourth tube body 320) is installed on the second mounting platform. The first platform 111 and the second platform 112 are the first iron core 110.

[0054] This embodiment further provides a motor having the above motor stator. The specific structure and working principle of the motor are well known to those skilled in the art, and will not be described in detail in this embodiment.

[0055] In the description of the present invention, it is necessary to understand that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred mechanism must have a specific orientation, be constructed and operated in a specific orientation, and should not be understood as a limitation on the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A motor stator, comprising a stator body (100), characterized in that: The stator body (100) is provided with a liquid inlet distribution mechanism (200), a liquid outlet converging mechanism (300), a first cooling channel (410) and a second cooling channel (510); The length directions of the liquid inlet distribution mechanism (200) and the liquid converging and discharging mechanism (300) are consistent with the axial direction of the stator body (100), and there is a preset distance between the liquid inlet distribution mechanism (200) and the liquid converging and discharging mechanism (300); The two ends of the first cooling channel (410) are respectively connected to the liquid inlet distribution mechanism (200) and the liquid converging and discharging mechanism (300), and a plurality of the first cooling channels (410) are arranged at intervals along the axial direction of the stator body (100) on one side of the stator body (100); the two ends of the second cooling channel (510) are respectively connected to the liquid inlet distribution mechanism (200) and the liquid converging and discharging mechanism (300), and a plurality of the second cooling channels (510) are arranged at intervals along the axial direction of the stator body (100) on the other side of the stator body (100); A plurality of first cooling pipes (400) are installed on one side of the stator body (100), and the first cooling pipes (400) are provided with the first cooling channels (410); and / or a plurality of second cooling pipes (500) are installed on the other side of the stator body (100), and the second cooling pipes (500) are provided with the second cooling channels (510); The first cooling tube (400) and the second cooling tube (500) are arc-shaped tubes, and a plurality of the first cooling tubes (400) are parallel to each other, and a plurality of the second cooling tubes (500) are parallel to each other, and their arcs are adapted to the outer circumference of the stator body (100); The stator body (100) comprises a plurality of first iron cores (110) and a plurality of second iron cores (120); at least one second iron core (120) is provided between two adjacent first iron cores (110); two adjacent first iron cores (110) and the second iron core (120) therebetween form a receiving groove; the first cooling tube (400) and the second cooling tube (500) are installed in the receiving groove; A first platform (111) is provided at the outer edge of one side of the first iron core (110); a plurality of first platforms (111) are arranged side by side to form a first mounting platform; and the liquid inlet distribution mechanism (200) is mounted on the first mounting platform; And / or, a second platform (112) is provided on the outer edge of the other side of the first iron core (110), a plurality of second platforms (112) are arranged side by side to form a second mounting platform, and the liquid confluence and discharge mechanism (300) is mounted on the second mounting platform.

2. The motor stator according to claim 1, characterized in that: The liquid inlet distribution mechanism (200) comprises a first tube body (210) and a second tube body (220) arranged side by side, and the first tube body (210) and the second tube body (220) are both provided with a liquid inlet (230); One end of the first cooling channel (410) is in communication with the first tube body (210), and the other end is in communication with the liquid converging and effluent mechanism (300); one end of the second cooling channel (510) is in communication with the second tube body (220), and the other end is in communication with the liquid converging and effluent mechanism (300).

3. The motor stator according to claim 2, characterized in that: The liquid inlet (230) is provided in the middle of the first tube body (210), and / or the liquid inlet (230) is provided in the middle of the second tube body (220).

4. The motor stator according to claim 2 or 3, characterized in that: The liquid converging and discharging mechanism (300) comprises a third tube body (310) and a fourth tube body (320) arranged side by side, and the third tube body (310) and the fourth tube body (320) are both provided with a liquid outlet (330); One end of the first cooling channel (410) is in communication with the first tube body (210), and the other end is in communication with the third tube body (310); one end of the second cooling channel (510) is in communication with the second tube body (220), and the other end is in communication with the fourth tube body (320).

5. The motor stator according to claim 4, characterized in that: The liquid outlet (330) is provided in the middle of the third tube body (310), and / or the liquid outlet (330) is provided in the middle of the fourth tube body (320).

6. The motor stator according to claim 1, characterized in that: The liquid inlet distribution mechanism (200) and the liquid outlet converging mechanism (300) are arranged relative to the axis of the stator body (100).

7. The motor stator according to claim 1, characterized in that: The plurality of first cooling channels (410) and the plurality of second cooling channels (510) are symmetrically arranged about an axis of the stator body (100).

8. The motor stator according to claim 1, characterized in that: A plurality of the first cooling channels (410) are arranged at even intervals, and / or a plurality of the second cooling channels (510) are arranged at even intervals.

9. The motor stator according to claim 8, characterized in that: The radial dimension of the first iron core (110) is greater than the radial dimension of the second iron core (120).

10. The motor stator according to claim 9, characterized in that: In the axial direction of the stator body (100), a plurality of the first iron cores (110) and a plurality of the second iron cores (120) are alternately arranged, and adjacent first iron cores (110) and second iron cores (120) are connected.

11. A motor, characterized in that: The invention comprises a motor stator as claimed in any one of claims 1 to 10.

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