Stator sealing device and motor

Abstract

The utility model relates to a stator sealing device and a motor, and the stator sealing device is used for sealing a stator groove defined by a stator yoke part, a stator tooth part and stator pole shoes, the stator sealing device comprises a sealing member which is used for being arranged at a notch formed between the two stator pole shoes, the sealing member is provided with a clamping part, and the clamping part is used for clamping the stator yoke part, the stator tooth part and the stator pole shoes; the clamping part is used for being connected with the stator pole shoe in a clamped mode, and the sealing piece is of a sealing structure which can deform at the preset temperature so as to be attached to the stator pole shoe. The sealing element is arranged at the notch of the stator groove to seal the stator groove, the sealing element is clamped with the stator pole shoes on the two sides through the clamping part, the sealing element is prevented from falling off, the sealing element can deform at the preset temperature to be attached to the stator pole shoes, in this way, the sealing element can be fixed more firmly, the sealing performance can be improved, and the service life of the motor is prolonged. The cooling medium is prevented from flowing out of the stator slots.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of motor stator, in particular to a stator sealing device and a motor. BACKGROUND

[0002] With the development of new energy vehicles, motors gradually develop towards small size and high power density, which puts higher requirements on the heat dissipation capacity of the motor. There are various existing motor cooling methods, among which the cooling effect of stator winding oil cooling is the best. After the winding is assembled into the stator, the cooling medium passes through the stator slot and the gap between the winding in the stator slot to directly contact and exchange heat, so the stator slot needs to be sealed. The sealing structure in the related art is not fixed and is easy to fall out, and the sealing is not tight and is easy to leak. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present disclosure is to provide a stator sealing device and a motor which can solve the above technical problems.

[0004] In order to achieve the above purpose, the present disclosure provides a stator sealing device for sealing the stator slot formed by the stator yoke, the stator tooth and the stator pole shoe, the stator sealing device comprising: a sealing member arranged at the slot opening formed between two stator pole shoes, the sealing member being provided with a clamping portion for clamping with the stator pole shoe, and the sealing member being configured as a sealing structure capable of deforming at a predetermined temperature to fit the stator pole shoe.

[0005] Optionally, the cross section of the sealing member is configured as an I-shaped structure, and the notches arranged on the opposite sides of the I-shaped structure are configured as the clamping portion.

[0006] Optionally, the sealing member is inserted into the slot opening along the length direction of the slot opening and cooperates with the gap of the stator pole shoe, and the sealing member is configured as a heat shrinkable sealing structure to fit the opposite sides of the pole shoe with the two horizontal sections of the I-shaped structure after heating.

[0007] Optionally, the outer surface of the sealing member is provided with a sealing soft layer or a sealing glue layer.

[0008] Optionally, the length of the sealing member is greater than the length of the slot opening so that the sealing member extends out of the slot opening.

[0009] Optionally, the sealing member is configured as a strip-shaped structure.

[0010] Optionally, the stator slot sealing device further comprises a connecting ring aligned with the slot opening, the sealing member is arranged on the same side of the connecting ring in the circumferential direction, and the number of the sealing members is the same as the number of the stator slots.

[0011] Optionally, the stator sealing device further comprises connecting rings aligned with the notches, the sealing members are arranged on the same side of the connecting rings in the circumferential direction, and two connecting rings are provided, and the two connecting rings are inserted into the notches along opposite sides of the notches, and the total number of the sealing members on the two connecting rings is the same as the number of the stator slots.

[0012] Optionally, the connecting rings are provided with sockets corresponding to the sealing members on the connecting rings on the opposite sides to enable the two connecting rings to be inserted and connected.

[0013] Another object of the present disclosure is to provide an electric machine comprising the above stator sealing device.

[0014] According to the above technical solution, the sealing members are arranged at the notches of the stator slots to seal the stator slots, the sealing members are clamped with the stator pole shoes on both sides through the clamping portions, the sealing members are prevented from falling off, and the sealing members can be deformed and combined with the stator pole shoes at a predetermined temperature, so that the sealing members can be fixed more firmly, and the sealing performance can be improved to prevent the cooling medium from flowing out of the stator slots.

[0015] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following specific embodiments to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0017] Figure 1 is a partial schematic view of the installation of the sealing member in the present disclosure;

[0018] Figure 2 is a structural schematic view of one of the embodiments of the sealing member in the present disclosure;

[0019] Figure 3 is Figure 2 the installation schematic view of the embodiment in the present disclosure;

[0020] Figure 4 is a structural schematic view of another embodiment of the sealing member in the present disclosure;

[0021] Figure 5 is Figure 4 the installation schematic view of the two connecting rings of the embodiment in the present disclosure;

[0022] Figure 6 is Figure 4 the installation schematic view of the embodiment in the present disclosure.

[0023] EXPLANATION OF REFERENCE NUMERALS

[0024] 1, stator yoke; 2, stator tooth; 3, stator slot; 31, slot opening; 4, sealing member; 41, clamping portion; 5, connecting ring; 51, socket; 6, stator pole shoe. DETAILED DESCRIPTION

[0025] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0026] In the present disclosure, the orientation words such as "upper, lower, top, bottom" used herein generally refer to the upper, lower, top, bottom of the corresponding components in the direction of gravity in the use state, and "inner, outer" refers to the inner, outer relative to the outline of the component or structure itself. In addition, in the description with reference to the drawings, the same reference signs in different drawings represent the same elements.

[0027] The present disclosure provides a stator sealing device for sealing the stator slot 3 enclosed by the stator yoke 1, the stator tooth 2 and the stator pole shoe 6, the stator sealing device comprising: a sealing member 4 arranged at the slot opening 31 formed between two stator pole shoes 6, the sealing member 4 being provided with a clamping portion 41 for clamping with the stator pole shoe 6, and the sealing member 4 being configured as a sealing structure that can be deformed at a predetermined temperature to fit the stator pole shoe 6.

[0028] Through the above technical solution, the sealing member 4 is arranged at the slot opening 31 of the stator slot 3 to seal the stator slot 3, and the sealing member 4 is clamped with the stator pole shoes 6 on both sides through the clamping portion 41 to prevent the sealing member 4 from falling off, and the sealing member 4 can be deformed at a predetermined temperature to fit the stator pole shoe 6, so that the sealing member 4 can be fixed more firmly, and the sealing performance can be improved to prevent the cooling medium from flowing out of the stator slot 3.

[0029] As an optional embodiment, the cross section of the sealing member 4 is configured as an I-shaped structure, the notches on both sides of the I-shaped structure are configured as the clamping portion 41, the end of the stator pole shoe 6 extends into the clamping portion 41 to clamp with the sealing member 4, and a receiving groove is provided at the slot opening 31 to accommodate the part of the I-shaped structure located outside the stator slot 3, preventing the I-shaped structure from protruding outside the slot opening 31 and interfering with other components.

[0030] Optionally, the sealing member 4 is inserted into the slot 31 along the length direction of the slot 31 and is in gap fit with the stator pole shoe 6, the sealing member 4 is configured as a heat shrink sealing structure to fit the two transverse sections of the I-shaped structure with the opposite sides of the pole shoe after heating, the sealing member 4 is in gap fit with the stator pole shoe 6, for example, the gap is 1-100 filaments, which is easier to install, the sealing member 4 is a heat shrink material, that is, a material that shrinks and deforms in a high temperature environment and does not change the shrinkage rate after returning to room temperature, for example, polyvinylidene fluoride, polytetrafluoroethylene, fluororubber, silicone heat shrink material, polyimide, and polyethylene terephthalate, etc., for example, the predetermined temperature is 200°, according to different materials and temperatures, after shrinking, the vertical section in the middle of the I-shaped structure shrinks and separates from the fit with the inner wall of the slot 31, and the two transverse sections shrink towards the center and fit with the two sides of the stator pole shoe 6 to complete the sealing.

[0031] Optionally, the outer surface of the sealing member 4 is provided with a sealing soft layer or a sealing glue layer, for example, the sealing soft layer is a silicone layer, which can tightly fit the top and bottom positions of the stator slot 3 after heat shrink sealing to form a seal; the sealing glue layer is a hot melt glue, which can be bonded with the stator slot 3 after heat shrink sealing to enhance the sealing performance.

[0032] Optionally, the length of the sealing member 4 is greater than the length of the slot 31 so that the sealing member 4 extends out of the slot 31, preventing the end of the sealing member 4 from shrinking after heat shrink forming and being located inside the end side of the stator slot 3, causing the coolant to leak at the end side, and the part of the sealing member 4 protruding out of the stator slot 3 after heat shrink forming is removed and flattened to prevent structural interference with other components.

[0033] As an embodiment, the sealing member 4 is configured as a strip structure, that is, the sealing member 4 is a single strip structure, during assembly, the sealing member 4 is inserted into the slot 31 between the stator pole shoes 6 in gap fit, and then the entire stator assembly is heated to allow the sealing member 4 to heat shrink and form, completing the sealing of the stator slot 3.

[0034] As a second embodiment, the stator slot 3 port sealing device further comprises a connecting ring 5 aligned with the slot 31, the sealing member 4 is arranged on the same side of the connecting ring 5 in the circumferential direction, and the number of sealing members 4 is the same as the number of stator slots 3, the connecting ring 5 is used to connect multiple sealing members 4, which can simplify the assembly process, and pressure needs to be applied between the connecting ring 5 and the stator during heat shrink forming to make them tightly fit to prevent leakage points. In addition, the connecting ring 5 protrudes outside the stator end face and can form a flow channel with the stator slot 3.

[0035] As a third embodiment, the stator sealing device further comprises connecting rings 5 aligned with the notches 31, the sealing members 4 are arranged on the same side of the connecting rings 5 in the circumferential direction, two connecting rings 5 are provided, the two connecting rings 5 are inserted into the notches 31 along opposite sides of the notches 31, the total number of the sealing members 4 on the two connecting rings 5 is the same as the number of the stator slots 3, the connecting rings 5 are provided with sockets 51 corresponding to the sealing members 4 on the connecting rings 5 on the opposite sides to enable the two connecting rings 5 to be inserted and fitted, the connecting rings 5 on the two sides are inserted into each other to simplify the assembly process, and the process of scraping the ends of the sealing members 4 can also be omitted, the sealing members 4 and the sockets 51 can be arranged in any suitable form, and in the present disclosure, the sealing members 4 and the sockets 51 are arranged at equal intervals, and the number of the sealing members 4 on one connecting ring 5 is half the number of the stator slots 3.

[0036] Another object of the present disclosure is to provide an electric machine comprising the above-mentioned stator sealing device, the sealing members 4 are clamped with the stator pole shoes 6 on the two sides through the clamping portions 41, and the sealing members 4 can be deformed at a predetermined temperature to fit the stator pole shoes 6, so that the sealing members 4 can be fixed more firmly, and the sealing performance can be improved to prevent the cooling medium from flowing out of the stator slots 3.

[0037] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0038] In addition, it should be noted that various specific technical features described in the above-described specific embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present disclosure will not further describe various possible combination manners.

[0039] In addition, various different embodiments of the present disclosure can also be combined in any manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed by the present disclosure.

Claims

1. A stator sealing device for sealing a stator slot formed by a stator yoke portion, a stator tooth portion, and a stator pole shoe, characterized by, The stator sealing device comprises: a sealing member arranged at the gap between two stator pole shoes, the sealing member being provided with a clamping portion for clamping with the stator pole shoes, and the sealing member being configured as a sealing structure capable of being deformed at a predetermined temperature to fit the stator pole shoes.

2. The stator seal arrangement of claim 1, wherein, The cross section of the sealing member is configured as an I-shaped structure, and the notches on the opposite sides of the I-shaped structure are configured as the clamping portions.

3. The stator seal arrangement of claim 2, wherein, The sealing member is inserted into the gap along the length direction of the gap and fits the stator pole shoes with a gap, and the sealing member is configured as a heat-shrinkable sealing structure to fit the two lateral segments of the I-shaped structure to the opposite sides of the pole shoes after being heated.

4. The stator seal arrangement of claim 3, wherein, The outer surface of the sealing member is provided with a sealing soft layer or a sealing glue layer.

5. The stator seal of claim 3, wherein, The length of the sealing member is greater than the length of the gap so that the sealing member extends out of the gap.

6. The stator seal of claim 1, wherein, The sealing member is configured as a strip-shaped structure.

7. The stator seal of claim 6, wherein, The stator gap sealing device further comprises a connecting ring aligned with the gap, and the sealing members are arranged on the same side of the connecting ring in a circumferential direction, and the number of the sealing members is the same as the number of the stator slots.

8. The stator seal of claim 6, wherein, The stator sealing device further comprises a connecting ring aligned with the gap, and the sealing members are arranged on the same side of the connecting ring in a circumferential direction, and the connecting ring is provided with two, and the two connecting rings are inserted into the gap along the opposite sides of the gap, and the total number of the sealing members on the two connecting rings is the same as the number of the stator slots.

9. The stator seal of claim 8, wherein, The connecting ring is provided with a socket corresponding to the sealing member on the connecting ring on the opposite side to enable the two connecting rings to be inserted and fitted.

10. An electric machine characterized by The stator sealing device of any one of claims 1-9. The stator sealing device of any one of claims 1-9.

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