Motor stator core sealing structure and motor
By setting cooling channels and seals between the motor stator core and the housing, combined with interference fit and turbulence column design, the problems of motor sealing leakage and high cost are solved, achieving effective cooling and sealing, and extending the service life of the motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-08
- Publication Date
- 2026-03-27
AI Technical Summary
The existing sealing structure between the stator core and the housing of electric motors has the problems of high leakage risk and high production cost.
The design adopts a cooling channel connected to the oil inlet. The end iron core is sealed to the shell through a seal. Multiple first protrusions are interference-fitted with the shell. The outer periphery of the middle iron core is provided with a turbulence column to form an interlaced cooling channel. The oil holes are unevenly distributed along the direction of gravity to achieve effective flow and sealing of the coolant.
It effectively prevents coolant leakage, reduces production costs, improves cooling efficiency, avoids the impact of coolant turbulence on the motor, ensures normal motor operation, and extends the service life.
Smart Images
Figure CN224053989U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor field especially relates to a motor stator core sealing structure and motor. BACKGROUND
[0002] The sealing of the stator core of the motor is an important measure to ensure the normal operation of the motor and prolong the service life.
[0003] The sealing between the current motor shell and the stator core is mainly formed by the interference fit of the core and the shell of multiple punched sheets, so that the type of the stator punched sheet is multiple, the production cost is high, and the sealing leakage risk of the stator core and the shell is high. SUMMARY
[0004] The utility model discloses a motor stator core sealing structure and motor can prevent the leakage between the shell and the stator core.
[0005] To solve the above technical problem, the embodiment of the utility model discloses a kind of motor stator core sealing structure, comprising:
[0006] Shell, oil inlet is equipped on the shell;
[0007] Stator core, the shell is circumferentially around the stator core, the stator core includes end core and middle core, along the axial direction, the end core is located at the two sides of the middle core;
[0008] Cooling channel is equipped between the middle core and the shell, and the cooling channel is communicated with the oil inlet;
[0009] The end core is equipped with a plurality of oil holes, the plurality of oil holes are spaced apart along the circumferential direction, and are communicated with the cooling channel, and the outer periphery of the end core is sealedly connected with the shell by a sealing element.
[0010] Using the above technical scheme, there is a cooling channel between the middle core and the shell, the cooling channel is communicated with the oil inlet on the shell, and the oil hole on the end core is communicated with the cooling channel, so that the cooling liquid (for example, cooling oil) enters the cooling channel between the middle core and the shell from the oil inlet of the shell, and then flows out from the oil hole of the end core and flows into the heat generating components (i.e., stator winding) of the end core to cool them. In this process, since the outer periphery of the end core is sealedly connected with the shell by a sealing element, the cooling liquid will only flow from the cooling channel to the oil hole, and will not flow out from the gap between the shell and the end core, preventing the leakage of the cooling liquid between the shell and the end core, avoiding the waste of the cooling liquid and preventing the impact of the chaotic flow of the cooling liquid on the motor.
[0011] According to another specific embodiment of the utility model, the utility model discloses a motor stator core sealing structure, along the radial, the upper and lower sides of the sealing piece are equipped with first protrusion, first protrusion is personally experienced sth, difference with the end portion core fit.
[0012] Adopt the technical scheme, through first protrusion personally experienced sth, difference with the end portion core fit, make the sealing effect between the shell and the end portion core better, prevent the leakage of cooling liquid between the shell and the end portion core, avoid the waste of cooling liquid and prevent the influence that cooling liquid turbulence brings to motor.
[0013] According to another specific embodiment of the utility model, the utility model discloses a motor stator core sealing structure, along the circumference, the first protrusion of the upper and lower sides of the sealing piece all includes a plurality, the plurality of first protrusions are spaced apart along the axial direction.
[0014] Adopt the technical scheme, through setting up a plurality of first protrusions, make the contact of shell and end portion core all seal, strengthen the sealing effect between the shell and the end portion core, prevent the leakage of cooling liquid between the shell and the end portion core, avoid the waste of cooling liquid and prevent the influence that cooling liquid turbulence brings to motor.
[0015] According to another specific embodiment of the utility model, the utility model discloses a motor stator core sealing structure, along the circumference, the outer periphery of the middle portion core is equipped with a plurality of turbulence column, the plurality of turbulence column extends along the radial direction, the plurality of turbulence column and the shell abut to form the cooling channel between the middle portion core and the shell.
[0016] Adopt the technical scheme, the plurality of turbulence column and the shell abut to form the cooling channel between the shell and the middle portion core, make the cooling liquid flow in the cooling channel, take away the heat of middle portion core.
[0017] According to another specific embodiment of the utility model, the utility model discloses a motor stator core sealing structure, the middle portion core is by including a plurality of core pieces, and each core piece is by a plurality of punching sheet superposition, along the circumference, the outer periphery of each punching sheet is equipped with a plurality of second protrusion, the plurality of punching sheet superposition to make the plurality of second protrusion superposition form the turbulence column.
[0018] According to another specific embodiment of the utility model, the utility model discloses a motor stator core sealing structure, the core piece rotates first angle along the circumference, to make the turbulence column of the plurality of core portions staggered arrangement along the axial direction.
[0019] According to the technical scheme, the iron core part is rotated by a first angle along the circumference, the plurality of spoiler columns are arranged in the axial direction, the cooling channels are also arranged in the axial direction, the iron core part is not rotated, the spoiler columns are attached in the axial direction, and the cooling channels are arranged in parallel, so that the local temperature rise caused by the cooling of the part of the stator core is avoided.
[0020] According to another specific embodiment of the utility model, the utility model discloses a motor stator core sealing structure, the oil hole is unevenly arranged along the circumference, along the direction of gravity, the number of the oil hole on the upper side is greater than the number of the oil hole on the lower side.
[0021] According to the technical scheme, under the action of gravity, the cooling liquid flowing out of the upper oil hole can flow to the stator winding to cool it.
[0022] The utility model discloses an electric machine, including stator winding and the motor stator core sealing structure of any one in above -mentioned embodiment, the stator core is equipped with a plurality of wire slots, the plurality of wire slots are arranged along the circumference interval, the stator winding is along the radial interval and is arranged in wire slot.
[0023] According to the technical scheme, the cooling liquid (for example, cooling oil) flows into the cooling channel from the oil inlet of the shell, and then flows to the oil hole from the cooling channel. The oil hole is distributed on the outer periphery of the end core. Under the action of gravity, the cooling liquid flows to the wire slot from the oil hole to cool the stator winding in the wire slot. In this process, since the shell and the end core are sealed by the sealing element, the cooling liquid only has the above-mentioned flow path, and will not flow out of the gap between the shell and the end core, preventing leakage. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 An exploded view of the stator core and the sealing element is shown.
[0025] Figure 2 A perspective view of the stator core and the sealing element is shown.
[0026] Figure 3 A partial cross-sectional view of the motor stator core sealing structure is shown.
[0027] Figure 4 A local enlarged view of the sealing element and the end core is shown.
[0028] Figure 5 A structural schematic view of the end core is shown.
[0029] Figure 6A structure schematic diagram of the punching sheet is shown.
[0030] Wherein, the reference numerals: 100, the shell; 101, the oil inlet; 102, the cooling channel; 200, the stator core; 201, the end core; 202, the middle core; 203, the oil hole; 204, the core piece; 205, the second protrusion; 206, the punching sheet; 207, the spoiler column; 208, the wire slot; 300, the sealing element; 301, the first protrusion. DETAILED DESCRIPTION
[0031] The other advantages and effects of the present application can be easily understood by those skilled in the art from the content disclosed in the specification. Although the description of the present application will be introduced in combination with the preferred embodiments, this does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the present application in combination with the embodiments is to cover other options or modifications that can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details will be included in the following description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.
[0032] It should be noted that in the present specification, similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0033] In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the present application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0034] The terms "first", "second", and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.
[0035] In the description of the embodiments, it should also be noted that unless specifically defined and limited, the terms "set", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments can be understood according to the specific circumstances.
[0036] In order to make the purpose, technical scheme and advantages of the utility model clearer, the embodiments of the utility model will be further described in detail below with reference to the drawings.
[0037] Reference Figures 1 to 3 The embodiment of the application discloses a motor stator core sealing structure, comprising: a shell 100 and a stator core 200, the shell 100 is provided with an oil inlet 101; the shell 100 surrounds the stator core 200 along the circumferential direction (i.e. Figure 2 The stator core 200 comprises an end core 201 and a middle core 202, and the end core 201 is arranged on both sides of the middle core 202 along the axial direction (i.e. Figure 2 A cooling channel 102 is arranged between the middle core 202 and the shell 100, and the cooling channel 102 is communicated with the oil inlet 101; the end core 201 is provided with a plurality of oil holes 203, and the plurality of oil holes 203 are arranged at intervals along the circumferential direction (i.e. Figure 2 The outer periphery of the end core 201 is sealingly connected with the shell 100 through a sealing element 300.
[0038] Exemplarily, the middle core 202 and the shell 100 have the cooling channel 102 therebetween, the cooling channel 102 is communicated with the oil inlet 101 on the shell 100, and the oil hole 203 on the end core 201 is communicated with the cooling channel 102, so that the cooling liquid (for example, cooling oil) enters the cooling channel 102 between the middle core 202 and the shell 100 from the oil inlet 101 of the shell 100, and then flows out from the oil hole 203 of the end core 201 and flows into the heat generating components (i.e. stator windings) of the end core 201 to cool them. In this process, since the outer periphery of the end core 201 is sealingly connected with the shell 100 through the sealing element 300, the cooling liquid only flows from the cooling channel 102 to the oil hole 203, and does not flow out from the gap between the shell 100 and the end core 201, thereby preventing the leakage of the cooling liquid between the shell 100 and the end core 201, avoiding the waste of the cooling liquid and preventing the influence of the cooling liquid turbulence on the motor.
[0039] It should be noted that the number of oil holes 203 is not limited in the embodiments of the present application, and can be fifteen, twenty-one, thirty, etc.
[0040] Exemplarily, referring to Figure 4 , along the radial direction (i.e. Figure 4 X direction shown in the figure), the upper and lower sides of the seal 300 are each provided with two first protrusions 301, and the upper and lower first protrusions 301 are arranged axially and are in interference fit with the shell 100 and the end core 201, respectively.
[0041] By adopting the above technical solution, the interference fit of the first protrusions 301 with the shell 100 and the end core 201 respectively makes the sealing effect between the shell 100 and the end core 201 better, prevents the leakage of the cooling liquid between the shell 100 and the end core 201, and avoids the waste of the cooling liquid and the influence of the turbulent flow of the cooling liquid on the motor. By arranging a plurality of first protrusions 301, the contact between the shell 100 and the end core 201 is sealed, the sealing effect between the shell 100 and the end core 201 is strengthened, the leakage of the cooling liquid between the shell 100 and the end core 201 is prevented, and the waste of the cooling liquid and the influence of the turbulent flow of the cooling liquid on the motor are avoided.
[0042] It should be noted that the number of first protrusions 301 is not limited in the embodiments of the present application, and can be one, three, four, etc.
[0043] Exemplarily, referring to Figure 2 and Figure 6 , the middle core 202 is formed by eleven core pieces 204, and the eleven core pieces 204 are arranged along the axial direction (i.e. Figure 2 Y direction shown in the figure) to form the middle core 202. Each core piece 204 is formed by stacking a plurality of punching sheets 206, and along the circumferential direction (i.e. Figure 6 A direction shown in the figure), the outer periphery of each punching sheet 206 is provided with a plurality of second protrusions 205, and the plurality of second protrusions 205 are arranged along the circumferential direction at uneven intervals. The plurality of punching sheets 206 are stacked to form a plurality of turbulence columns 207, and the core piece 204 is rotated by a first angle along the circumferential direction, so that the turbulence columns 207 of the plurality of cores are arranged at intervals along the axial direction.
[0044] It should be noted that the number of core pieces 204 and punching sheets 206 is not limited in the embodiments of the present application, and can be fifteen, twenty-one, thirty, etc. Similarly, the number of second protrusions 205 is not limited in the embodiments of the present application, and can be ten, fifteen, twenty-one, thirty, etc.
[0045] Exemplarily, by rotating the core piece 204 along the circumferential direction by a first angle, the plurality of spoiler columns 207 are arranged in axial staggered manner, and the cooling channels 102 are also arranged in axial staggered manner, so that the local temperature rise caused by the partial stator core 200 unable to be cooled due to the non-rotation of the core piece 204, the axial adhesion of the spoiler columns 207 and the parallel arrangement of the cooling channels 102 can be avoided.
[0046] That is, along the circumferential direction, the outer periphery of the middle core 202 is provided with a plurality of spoiler columns 207, the plurality of spoiler columns 207 extend along the radial direction, and the plurality of spoiler columns 207 abut against the shell 100 to form the cooling channel 102 between the middle core 202 and the shell 100, so that the cooling liquid flows in the cooling channel 102 to take away the heat of the middle core 202.
[0047] Exemplarily, referring to Figure 2 and Figure 5 , the middle core 202 and the end core 201 are provided with a plurality of wire slots 208, the plurality of wire slots 208 are arranged in spaced apart manner along the circumferential direction (i.e. the A direction shown in Figure 5 ), and each wire slot 208 contains a plurality of stator windings (not shown in the figure), and the plurality of stator windings are arranged in spaced apart manner along the radial direction (i.e. the X direction shown in Figure 5 ). It should be noted that the specific number of wire slots 208 and stator windings is not limited in the embodiments of the present application, and can be thirty wire slots 208, thirty-four wire slots 208, forty wire slots 208, etc., and can be three stator windings, four stator windings, five stator windings, etc.
[0048] Exemplarily, referring to Figure 5 , the oil holes 203 of the end core 201 are arranged in non-uniform spaced apart manner along the circumferential direction, and along the direction of gravity, the number of the upper oil holes 203 is greater than the number of the lower oil holes 203. That is, the oil holes above the ab line along the radial direction (i.e. the X direction shown in Figure 5 ) are the upper oil holes 203, and the oil holes below the ab line are the lower oil holes 203, the number of the upper oil holes 203 is 25, and the number of the lower oil holes 203 is 23, and the number of the upper oil holes 203 is greater than the number of the lower oil holes 203, but is not limited thereto, and the number of the upper oil holes 203 and the number of the lower oil holes 203 are not limited in the embodiments of the present application, and can also be 30 upper oil holes 203 and 20 lower oil holes 203, etc. Moreover, the distance between each oil hole 203 is different, that is, the oil holes 203 are arranged in non-uniform spaced apart manner along the circumferential direction (i.e. the A direction shown in Figure 5 ).
[0049] Under the action of gravity, the cooling liquid flowing out of the upper oil hole 203 can flow to the stator winding to cool it. The shape of the oil hole 203 is circular, but the shape of the oil hole 203 is not limited in the embodiment of the application, and can also be square or other shapes. The shape of each oil hole 203 can be the same or different, and the circumferential angle of each oil hole 203 is 360° / n, where n is the number of slots. A plurality of oil holes 203 are arranged in a row along the circumferential direction (i.e. the A direction shown in the figure), and the distance between adjacent two oil holes 203 can be the same or different. Figure 5
[0050] The oil channel of the stator core 200 in the embodiment of the application is composed of a plurality of groups of staggered oil paths, the oil channel is designed to have oil entering from the middle core 202 and oil exiting from both ends (end core 201), the oil flow enters from the circumferential direction position, the oil flow is converted from one path to a plurality of paths by the spoiler column 207 to change the direction of the oil flow and slow down the flow rate, so that the cooling oil can continuously contact the core, enhance heat conduction, and form a continuous cooling effect on the surface. The oil flow is finally accelerated by the oil hole 203 of the end core 201 and sprayed to the stator winding, so as to slow down the temperature rise of the stator winding. The end part is designed to have one type of core (i.e. the end core 201) and one type of sealing member 300, the end core 201 forms the oil hole 203 facing the stator winding, and the sealing member 300 forms the seal between the end core 201 and the shell 100, so as to have better cooling effect and smaller influence on the electromagnetic magnetic circuit.
[0051] The cooling liquid (such as cooling oil) enters from the position of the middle core 202, the oil flow is converted from one path to a plurality of paths by the spoiler column 207 to change the direction of the oil flow and slow down the flow rate, so as to increase the contact area with the core and increase the heat dissipation efficiency. Then, the oil flow passes through the oil hole 203 of the end core 201 and is sprayed on the stator winding at a certain angle to cool the stator winding.
[0052] The embodiment of the application forms a plurality of groups of oil paths by two types of core punching sheets 206 (end core 201 and middle core 202) and one type of sealing member 300, the middle core 202 forms the spoiler column 207 to increase the contact area and cool the stator core 200, the end core 201 realizes axial sealing and forms the oil hole 203 facing the stator winding, and the series structure is used to realize the cooling of the stator core 200 and the stator winding at the same time with smaller flow rate.
[0053] The outer annular oil channel structure design of the stator core 200 in the embodiment of the application can at least achieve the following effects:
[0054] 1. Theoretical calculation is sufficient and the design maturity is high;
[0055] 2. The material and process cost is reduced;
[0056] 3. The sealing is reliable, the cooling effect is good, the number of parts is small, and the design cost is reduced.
[0057] Exemplarily, the end core 201 forms an oil hole 203 towards the direction of the stator winding, the outer diameter of the oil hole 203 is smaller than the inner diameter of the shell 100, so that the cost is lower, the arrangement of the position of the oil hole 203 is more flexible, then the sealing member 300 is in interference fit with the end core 201 and the inner wall of the shell 100, forming a seal to the oil, so that the oil can only be injected to the direction of the stator winding through the oil hole 203, thereby preventing the leakage of the cooling liquid between the shell 100 and the end core 201, avoiding the waste of the cooling liquid and preventing the influence of the cooling liquid turbulent flow on the motor.
[0058] Although the utility model has been illustrated and described with reference to certain preferred embodiments thereof, it should be understood by those skilled in the art that the above content is further detailed description of the utility model in combination with specific embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. Those skilled in the art can make various changes in form and details, including making a number of simple inferences or substitutions, without departing from the spirit and scope of the utility model.
Claims
1. A sealing structure of a stator core of an electric machine, characterized by, include: A housing, wherein an oil inlet is provided on the housing; A stator core, wherein the housing surrounds the stator core circumferentially, the stator core comprising end cores and a middle core, and the end cores being disposed on both sides of the middle core along the axial direction; A cooling channel is provided between the central iron core and the shell, and the cooling channel is connected to the oil inlet. The end core is provided with a plurality of oil holes, which are spaced apart along the circumference and connected to the cooling channel. The outer periphery of the end core is sealed to the housing by a sealing element.
2. The motor stator core sealing structure of claim 1, wherein, Along the radial direction, the seal has a first protrusion on both the upper and lower sides, and the first protrusion is respectively interference-fitted with the housing and the end iron core.
3. The motor stator core sealing structure of claim 2, wherein, Along the circumferential direction, the first protrusions on both the upper and lower sides of the seal include multiple protrusions, and the multiple first protrusions are spaced apart along the axial direction.
4. The motor stator core sealing structure of claim 1, wherein, Along the circumferential direction, a plurality of baffles are provided on the outer periphery of the central iron core. The plurality of baffles extend radially and abut against the housing to form the cooling channel between the central iron core and the housing.
5. The motor stator core sealing structure of claim 4, wherein The central core comprises multiple core components, each of which is formed by stacking multiple laminations. Along the circumferential direction, each lamination has multiple second protrusions on its outer periphery. The multiple laminations are stacked to form the multiple second protrusions to create the turbulence column.
6. The motor stator core sealing structure of claim 5, wherein, The iron core is rotated by a first angle along the circumference so that the turbulence columns of the plurality of iron cores are staggered along the axial direction.
7. The motor stator core sealing structure of claim 1, wherein The oil holes are spaced unevenly along the circumference, and the number of oil holes on the upper side is greater than the number of oil holes on the lower side along the direction of gravity.
8. An electric machine characterized by include: The stator winding and the motor stator core sealing structure as described in any one of claims 1 to 7, wherein the stator core is provided with a plurality of slots, the plurality of slots are spaced apart along the circumferential direction, and the stator winding is spaced apart along the radial direction in the slots.