CN118040938A - Oil injection ring for spraying stator with cooling oil distribution function - Google Patents

Abstract

The application relates to the technical field of motor cooling, in particular to an oil spraying ring for spraying a stator and distributing cooling oil, which comprises a fixing part, an extrusion part, a cooling oil separation part and an oil spraying part, wherein the fixing part is in a circular ring shape; the cooling oil separator uniformly divides the oil injection part into a plurality of oil injection grids at intervals, and a plurality of oil injection holes are formed in the oil injection grids; in the application, the cooling oil separator is divided into a plurality of equal oil spraying grids, so that cooling liquid can be quantitatively distributed into the oil spraying grids, and then sprayed out through a plurality of oil spraying holes in the oil spraying grids, so that the oil quantity distribution of the cooling oil is more scientific, the cooling effect of the cooling oil on the motor is improved, and the power of the motor is improved.

Description

Oil injection ring for spraying stator with cooling oil distribution function

Technical Field

The application relates to the technical field of motor cooling, in particular to an oil spraying ring for spraying a stator and distributing cooling oil.

Background

At present, in the use process of various motors, for the safety and the protection of the use of the motors, the temperature in the working process of the motors needs to be detected or controlled, if the temperature in the working process of the motors reaches a certain value, the power of the motors needs to be reduced for forced cooling, the safety and the effective service life of products are ensured, and the high-power continuous output of the motors and the upward expansion of the power are limited.

In the case of conventional motor designs, there are two common cooling modes for motors: the design scheme is that the outer surface of the motor is provided with a large enough radiating surface or the motor is an open design scheme, and the radiating purpose is achieved by heat exchange between an air medium and the motor; the other is forced air cooling, and the design scheme is that the motor rotor is integrated with fan blades or the motor is externally integrated with a fan to accelerate the air circulation inside/outside the motor, so that the heat exchange between the motor temperature and the air is accelerated, and a better heat dissipation effect is achieved.

In order to further improve the temperature rise problem of the motor, the torque/power of the motor is expanded to the maximum extent, various single water cooling, single oil cooling and even mixed cooling (cooling modes with coexisting cooling means) motors are developed in the market through continuous design improvement, and compared with the traditional motor cooling scheme, the water cooling, single oil cooling or mixed cooling motor greatly improves the cooling power.

But install the ring of spouting on the motor on the market at present, in the oil-cooled motor of reuse spouting ring blowout coolant liquid and cooling, the unable effective control of accomplishing of the injection quantity of spouting the ring of spouting leads to spouting ring spun coolant liquid and distributes unevenly, can't cool down the motor uniformly, leads to the cooling effect to the motor to reduce, can't exert the higher performance of motor. Thus, further improvements can be made.

Disclosure of Invention

In order to increase the cooling effect on the motor and thus the power of the motor, the application provides an oil spray ring for spraying a stator, which oil spray ring is used for distributing cooling oil.

The application provides an oil injection ring for a spray stator, which is used for distributing cooling oil mass, and adopts the following technical scheme:

The oil spraying ring for spraying the stator to distribute the cooling oil quantity comprises a fixing part, an extrusion part, a cooling oil separation part and an oil spraying part, wherein the fixing part is in a ring shape, the extrusion part is arranged on the fixing part, the extrusion part is arranged at one end, close to a motor end cover, of the oil spraying ring when the oil spraying ring is installed, the cooling oil separation part and the oil spraying part are arranged at the radial inward position of the fixing part, and the cooling oil separation part and the oil spraying part are close to the end face of a motor stator core when the oil spraying ring is arranged; the cooling oil separator is used for uniformly dividing the oil injection part into a plurality of oil injection grids at intervals, and a plurality of oil injection holes are formed in the oil injection grids.

Through the technical scheme, when the oil injection ring is arranged in the motor, the circumferentially-arranged fixing part is attached to the inner wall of the engine base, the bottom of the oil injection part is attached to the end face of the motor stator core, and cooling oil enters the oil injection grid after entering the oil injection ring through the oil groove of the stator core and is injected onto the stator winding wire package through the oil injection holes on the oil injection grid for cooling; the installation position of the oil injection ring is limited in the installation process, so that the fixing part and the oil injection part are arranged at positions corresponding to the motor, and a plurality of equal oil injection grids are divided by the cooling oil separating piece, so that cooling liquid can be quantitatively distributed into the oil injection grids and then sprayed out through a plurality of oil injection holes in the oil injection grids; meanwhile, oil quantity distribution of the cooling oil is more scientific by designing oil spray holes with different sizes and numbers, the cooling effect of the cooling oil on the motor is improved, and therefore the power of the motor is improved.

Optionally, when the fixing part is installed, the outer circular surface of the fixing part is tightly attached to the inner circular surface of the motor base, and the outer circular surface of the oil injection part is tightly attached to the inner circular surface of the fixing part.

By adopting the technical scheme, when the fixing part is installed, the outer circular surface of the fixing part is tightly attached to the inner circular surface of the motor base, and the outer circular surface of the oil injection part is installed on the inner circular surface of the fixing part, so that the inner circular surface of the fixing part is tightly attached to the outer circular surface of the oil injection part, and after cooling oil enters the oil injection ring through the oil groove of the stator core, the cooling oil can only be sprayed out from the oil injection hole of the oil injection part.

Optionally, the cooling oil separator includes a plurality of cooling oil separators, and the plurality of cooling oil separators are uniformly distributed in a ring shape at intervals to divide the oil injection part into a plurality of oil injection grids.

By adopting the technical scheme, the cooling oil in different areas is separated by utilizing the plurality of cooling oil separators, so that the cooling oil separators are not communicated with each other, and each oil spraying grid is ensured to have enough pressure to spray the cooling oil from the oil spraying holes.

Optionally, the oil spraying portion is provided with a circumference positioning portion, the circumference positioning portion is close to the motor stator core terminal surface when installing, the circumference constant head tank that is used for grafting circumference positioning portion is seted up to motor stator core terminal surface.

Through adopting above-mentioned technical scheme, set up circumference location portion, in the actual installation, circumference location portion is connected with the circumference constant head tank on the motor stator core terminal surface, ensures that the position between the two is accurate to it, improves the precision of installation, reduces assembly error, increases the stability between oil spray ring and the motor for install between oil spray ring can be better and the motor, ensure that the oil spout portion installs the position on corresponding motor correct, make oil spray ring installation back no angle skew, guarantee normal cooling work.

Optionally, the holding part, the extrusion part, the cooling oil separating part, the oil spraying part and the circumferential positioning part are all integrally formed by materials with good toughness.

Through adopting above-mentioned technical scheme, through the material integrated into one piece that has good toughness between fixed part, extrusion piece, cooling oil separator, oil spout portion, the circumference location portion, improved the wholeness of spouting the oil ring, make it have good toughness and elasticity.

Optionally, the extrusion has certain toughness and can take place elastic deformation, the extrusion has a plurality ofly, a plurality of the extrusion is circumference evenly distributed on the fixed part, the extrusion includes two first extrusion portions, two first extrusion portions set up side by side, two the one end that is close to the fixed part of first extrusion portion all is connected with the fixed part, two the one end that keeps away from the fixed part of first extrusion portion all extends towards another first extrusion portion direction mutual tilt up, two first extrusion portion forms open-top's trapezium structure, two form first recess between the first extrusion portion, can press deformation in the first recess when first extrusion portion receives the pressure of motor end cover.

Through adopting above-mentioned technical scheme, set up first recess, when spouting oil ring and motor and assemble, extrusion piece and motor end cover contact, receive axial pressure for two first extrusion portions take place elastic bending in the first recess simultaneously, and through the elastic deformation of first extrusion portion, not only make spouting oil ring ability self-adaptation installation space, realize quick assembly in place, improve spouting oil ring assembly precision, but also can convert partial axial pressure into the elastic potential energy of two first extrusion portions, can effectively prevent because of the too big and damage to spouting oil ring or motor of axial pressure when assembling.

Optionally, the fixing part, the cooling oil separating part, the oil spraying part and the circumferential positioning part are all made of a material with high strength and hard texture and are integrally formed by die casting.

Through adopting above-mentioned technical scheme, through having the integrative die casting shaping of the material that intensity is high, the texture is hard between fixed part, cooling oil separator, oil spout portion, the circumference location portion, the connected mode of integrative die casting makes a plurality of spare parts integrate into a structure, has reduced the waste of material for integrated structure is compacter, can also reduce defect and the material fatigue of junction through integrative die casting, improves the bulk strength and the stability of oil spout ring.

Optionally, the extrusion has certain toughness and can take place elastic deformation, the extrusion has a plurality ofly, a plurality of the extrusion is circumference evenly distributed on the fixed part, the extrusion is for having good toughness and elastic elasticity knock pin, a plurality of installation counter bores have been seted up along its circumferencial direction on the fixed part, installation counter bore quantity with elasticity knock pin quantity is unanimous, elasticity knock pin realizes being connected with the fixed part through with installation counter bore interference fit.

Through adopting above-mentioned technical scheme, elasticity knock pin through installation counter bore and the removable installation of fixed part, elasticity knock pin and fixed part are mutually independent promptly to elasticity knock pin and fixed part can adopt different materials to make respectively, and fixed part can adopt structural strength high, the material that the texture is hard to make, and elasticity knock pin selects to have good toughness, elasticity and oil resistance's material to make, can make fixed part have good bearing capacity, and fixed part produces crackle even fracture when preventing the assembly pressurized, also can make the extrusion piece have good toughness and elasticity simultaneously to the extrusion piece takes place elastic deformation.

Optionally, the holding part, the extrusion part and the cooling oil separating part are molded by materials with good toughness, and the oil spraying part and the circumferential positioning part are integrally molded by materials with wide temperature resistance range, oil resistance and good strength; the fixing part, the extrusion part, the cooling oil separating part, the oil injection part and the circumferential positioning part are assembled into an integral oil injection ring structure in an embedded matching mode.

By adopting the technical scheme, the fixing part, the extrusion part, the cooling oil separating part, the oil spraying part and the circumferential positioning part are respectively made of different materials, materials with good toughness are adopted among the fixing part, the extrusion part and the cooling oil separating part, and the oil spraying part and the circumferential positioning part are made of materials with wide temperature resistant range, oil resistance and good strength, so that the fixing part, the extrusion part and the cooling oil separating part have good toughness and elastic capability, and the oil spraying part and the circumferential positioning part have good bearing capability.

Optionally, the extrusion has certain toughness and can take place elastic deformation, the extrusion has a plurality ofly, a plurality of the extrusion is circumference evenly distributed on the fixed part, the extrusion includes boss, two second extrusion portions, on the fixed part is installed to boss bottom, two the bottom of second extrusion portion sets up in the both sides at boss top side by side, two the both ends that keep away from the fixed part of second extrusion portion all upwards incline each other towards another second extrusion portion direction and extend, two second extrusion portion forms open-top's trapezium structure, two form the second recess between the second extrusion portion, can press deformation in the second recess towards when second extrusion portion receives axial direction's pressure.

Through adopting above-mentioned technical scheme, set up the second recess, when spouting oil ring and motor and assembling, extrusion piece and motor end cover contact, receive axial pressure for two second extrusion portions take place elastic bending in the second recess simultaneously, and through the elastic deformation of second extrusion portion, not only make the oil ring can self-adaptation installation space, realize quick assembly in place, improve oil ring assembly precision, but also can turn into the elastic potential energy of two second extrusion portions with partial axial pressure, can effectively prevent because of the too big and damage to oil ring or motor of axial pressure when assembling.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the oil injection ring is arranged in the motor, the fixedly-holding part arranged on the circumference is attached to the inner wall of the motor base, the bottom of the oil injection part is attached to the end face of the stator core of the motor, and cooling oil enters the oil injection grid after entering the oil injection ring through the oil groove of the stator core and is injected onto the stator winding wire package through the oil injection holes on the oil injection grid for cooling; the installation position of the oil injection ring is limited in the installation process, so that the fixing part and the oil injection part are arranged at positions corresponding to the motor, and a plurality of equal oil injection grids are divided by the cooling oil separating piece, so that cooling liquid can be quantitatively distributed into the oil injection grids and then sprayed out through a plurality of oil injection holes in the oil injection grids; meanwhile, oil quantity distribution of cooling oil is more scientific by designing oil spray holes with different sizes and numbers, and the cooling effect of the cooling oil on the motor is improved, so that the power of the motor is improved;

2. The elastic ejector pin is detachably arranged through the mounting counter bore and the fixing part, namely the elastic ejector pin and the fixing part are mutually independent, so that the elastic ejector pin and the fixing part can be respectively made of different materials, the fixing part can be made of materials with high structural strength and hard texture, and the elastic ejector pin is made of materials with good toughness, elasticity and oil resistance, so that the fixing part has good bearing capacity, the fixing part is prevented from cracking or even breaking when being assembled and pressed, and meanwhile, the extrusion part has good toughness and elasticity, so that the extrusion part is elastically deformed;

3. The second groove is formed, when the oil spraying ring is assembled with the motor, the extrusion piece is in contact with the motor end cover and receives axial pressure, so that the two second extrusion parts are elastically bent towards the second groove at the same time, and the oil spraying ring can be self-adaptively installed in space through elastic deformation of the second extrusion parts, so that the quick assembly is in place, the assembly precision of the oil spraying ring is improved, the partial axial pressure can be converted into elastic potential energy of the two second extrusion parts, and damage to the oil spraying ring or the motor due to overlarge axial pressure during assembly can be effectively prevented.

Drawings

Fig. 1 is a schematic overall structure of a first embodiment of the present application.

Fig. 2 is a partial cross-sectional view of a first embodiment of the application.

Fig. 3 is an enlarged view of the part a of fig. 1.

Fig. 4 is a schematic view of a structure integrally installed in a motor according to a first embodiment of the present application.

Fig. 5 is a schematic overall structure of a second embodiment of the present application.

Fig. 6 is an enlarged view of the part B of fig. 5.

Fig. 7 is a partial cross-sectional view of a second embodiment of the present application.

Fig. 8 is a schematic overall structure of a third embodiment of the present application.

Fig. 9 is an exploded view of the structure of a third embodiment of the present application.

Fig. 10 is a cross-sectional view of a third embodiment of the present application.

Fig. 11 is an enlarged view of the C portion structure in fig. 8.

Reference numerals illustrate:

1. A holding portion; 11. installing a counter bore; 2. an extrusion; 21. a first pressing part; 22. a second pressing part; 23. a first groove; 24. a second groove; 25. an elastic ejector pin; 26. a boss; 3. a cooling oil separator; 31. a cooling oil partition; 4. an oil injection part; 41. a fuel injection grid; 42. an oil injection hole; 5. a circumferential positioning portion; 100. and an oil injection ring.

Detailed Description

The application is described in further detail below with reference to fig. 1-11.

The embodiment of the application discloses an oil injection ring for a spray stator, which is used for distributing cooling oil.

Example 1:

Referring to fig. 1, 2 and 3, an oil spray ring for a spray stator with a cooling oil distribution comprises a holding part 1, an extrusion part 2, a cooling oil partition 3, an oil spray part 4 and a circumferential positioning part 5, wherein the holding part 1, the extrusion part 2, the cooling oil partition 3, the oil spray part 4 and the circumferential positioning part 5 are integrally formed by materials with good toughness.

The fixing part 1 is annular, the extrusion part 2 is positioned at the top of the fixing part 1, and when the oil injection ring 100 is installed, the oil injection part 4 is annular, the cooling oil separating piece 3 is installed on the oil injection part 4, the cooling oil separating piece 3 and the oil injection part 4 are both arranged at the radial inward position of the fixing part 1, the outer circular surface of the fixing part 1 is tightly attached to the inner circular surface of the motor base when the fixing part 1 is installed, and the cooling oil separating piece 3 and the oil injection part 4 are tightly attached to the inner circular surface of the fixing part 1, so that the cooling oil separating piece 3 and the oil injection part 4 are close to the end surface of the motor stator core when the oil injection ring 100 is assembled; the circumference positioning part 5 is positioned on one side of the oil spraying part 4, which is far away from the extrusion part 2, when the oil spraying ring 100 is assembled on the motor, the circumference positioning part 5 is close to the end face of the motor stator core, and the end face of the motor stator core is provided with a circumference positioning groove for inserting the circumference positioning part 5; the circumferential positioning part 5 is used for ensuring the position accuracy between the oil spraying ring 100 and the motor.

The cooling oil separator 3 comprises a plurality of cooling oil separating parts 31, the plurality of cooling oil separating parts 31 are uniformly distributed on the oil spraying part 4 at intervals, a plurality of oil spraying grids 41 are separated on the oil spraying part 4, and a plurality of oil spraying holes 42 are formed in the oil spraying grids 41; the cooling oil in different areas is separated by a plurality of cooling oil separators 3 so as not to be communicated with each other, and each oil spraying grid 41 is ensured to have enough pressure to spray the cooling oil from the oil spraying holes 42; when the oil spray ring 100 is assembled into the motor, the cooling oil can uniformly spray and cool the stator iron core and windings in the motor through the oil spray part 4, so that the motor is cooled, and the motor power is increased.

Referring to fig. 1 and 4, specifically, in this embodiment, the extrusion 2 has a certain toughness and can be elastically deformed, the extrusion 2 has a plurality of extrusion 2, the plurality of extrusion 2 is installed at the top of the fixing portion 1 at uniform intervals along the circumferential direction, the extrusion 2 includes two first extrusion portions 21, wherein the two first extrusion portions 21 are arranged side by side, one ends of the two first extrusion portions 21, which are close to the fixing portion 1, are connected with the fixing portion 1, one ends of the two first extrusion portions 21, which are far away from the fixing portion 1, extend obliquely upwards towards each other in the direction of the other first extrusion portion 21, the two first extrusion portions 21 form a trapezoid structure with an open top, a first groove 23 is formed between the two first extrusion portions 21, when the first extrusion portions 21 are subjected to the pressure of the motor end cover, the two first extrusion portions 21 can be elastically bent towards the inner sides of the first groove 23, that is, the extrusion 2 is elastically deformed, so that the self-adaptive installation space is performed on the extrusion ring 100, rapid assembly is realized, and the pressure of the motor end cover is buffered and absorbed by the bending deformation of the first extrusion portions 21.

The implementation principle of the embodiment 1 is as follows: in the actual assembly process, the circumferentially-mounted fixing part 1 is attached to the inner wall of the engine base, the bottom of the oil injection part 4 is attached to the end face of the motor stator core, and cooling oil enters the oil injection grid 41 after entering the oil injection ring 100 through the oil groove of the stator core, and is injected onto the stator winding coil through the oil injection holes 42 on the oil injection grid 41 for cooling; in the installation process of the oil spraying ring 100, the installation position needs to be limited, so that the fixing part 1 and the oil spraying part 4 are installed at the positions corresponding to the motors, and then a plurality of equal oil spraying grids 41 are divided by the cooling oil separating piece 3, so that the cooling liquid can be quantitatively distributed into the oil spraying grids 41 and sprayed out through a plurality of oil spraying holes 42 in the oil spraying grids 41; meanwhile, through the design of the oil spray holes 42 with different sizes and numbers, the oil mass distribution of the cooling oil is more scientific, the cooling effect of the cooling oil on the motor is improved, and therefore the power of the motor is improved.

Example 2:

Referring to fig. 5,6, 7, the present embodiment is different from embodiment 1 in the mounting manner among the holding portion 1, the cooling oil partition 3, the oil injection portion 4, the circumferential positioning portion 5, and the structure of the extrusion 2.

Specifically, in the present embodiment, the holding portion 1, the cooling oil separator 3, the oil injection portion 4, and the circumferential positioning portion 5 are all made of a material having high strength and hard texture, and are integrally die-cast; through having the integrative die-casting shaping of the material that intensity is high, the texture is hard, the connected mode of integrative die-casting makes a plurality of spare parts integrate into a structure, has reduced the waste of material for integrated structure is compacter, can also reduce defect and the material fatigue of junction through integrative die-casting, improves the bulk strength and the stability of spout the ring 100.

Referring to fig. 5, 6 and 7, in this embodiment, the extrusion 2 is an elastic knock pin 25 with good toughness and elasticity, and correspondingly, the holding portion 1 is provided with a plurality of mounting counter bores 11 along the circumferential direction thereof, the number of the mounting counter bores 11 is consistent with that of the elastic knock pins 25, the elastic knock pin 25 is connected with the holding portion 1 through interference fit with the mounting counter bores 11, and the elastic knock pin 25 is detachably mounted with the holding portion 1 through the mounting counter bores 11, that is, the elastic knock pin 25 and the holding portion 1 are mutually independent, so that the elastic knock pin 25 and the holding portion 1 can be respectively made of different materials, the holding portion 1 can be made of materials with high structural strength and hard texture, and the elastic knock pin 25 is made of materials with good toughness, elasticity and oil resistance, so that the holding portion 1 has good bearing capacity, and can prevent the holding portion 1 from cracking or even breaking when the extrusion 2 is pressed, and the extrusion 2 can be elastically deformed.

Example 3:

Referring to fig. 8, 9, 10, the present embodiment is different from embodiment 1 in the mounting manner among the holding portion 1, the cooling oil partition 3, the oil injection portion 4, the circumferential positioning portion 5, and the structure of the extrusion 2.

Specifically, in the embodiment, the holding part 1, the extrusion part 2 and the cooling oil separating part 3 are molded by materials with good toughness, and the oil spraying part 4 and the circumferential positioning part 5 are integrally molded by materials with wide temperature resistant range, oil resistance and good strength; the fixing part 1, the extrusion part 2, the cooling oil separating part 3, the oil injection part 4 and the circumferential positioning part 5 are assembled into an integral oil injection ring 100 structure in an embedded matching mode, and the sealing performance and the size deviation compatibility of the oil injection ring 100 are improved due to the embedded design. The fixing part 1, the extrusion part 2, the cooling oil separating piece 3, the oil spraying part 4 and the circumferential positioning part 5 are respectively made of different materials, materials with good toughness are adopted among the fixing part 1, the extrusion part 2 and the cooling oil separating piece 3, and the oil spraying part 4 and the circumferential positioning part 5 are made of materials with wide temperature resistant range, oil resistance and good strength, so that the fixing part 1, the extrusion part 2 and the cooling oil separating piece 3 have good toughness and elastic capability, and the oil spraying part 4 and the circumferential positioning part 5 have good bearing capability.

Referring to fig. 8 and 11, specifically, in this embodiment, the extrusion 2 includes a boss 26 and two second extrusion portions 22, wherein the bottom of the boss 26 is mounted on the fixing portion 1, the bottoms of the two second extrusion portions 22 are disposed side by side on two sides of the top of the boss 26, two ends of the two second extrusion portions 22, which are far away from the fixing portion 1, extend obliquely upward toward each other in the direction of the other second extrusion portion 22, the two second extrusion portions 22 form a trapezoid structure with an open top, a second groove 24 is formed between the two second extrusion portions 22, and when the second extrusion portions 22 are under pressure of the motor end cover, the two second extrusion portions 22 can be elastically bent toward the inner side of the second groove 24, that is, the extrusion 2 is elastically deformed, so that the oil injection ring 100 is self-adaptively mounted in place, and the pressure of the motor end cover is buffered and absorbed by the bending deformation of the second extrusion portions 22.

The embodiments of the present application are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, wherein like reference numerals are used to refer to like elements throughout. Therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (10)

1. An oil spray ring for a spray stator having an amount of distributed cooling oil, characterized by: the motor stator core oil injection device comprises a fixing part (1), an extrusion part (2), a cooling oil separating piece (3) and an oil injection part (4), wherein the fixing part (1) is in a circular ring shape, the extrusion part (2) is arranged on the fixing part (1), the extrusion part (2) is arranged at one end, close to a motor end cover, of the oil injection ring (100) during installation, the cooling oil separating piece (3) and the oil injection part (4) are arranged at the radial inward position of the fixing part (1), and the cooling oil separating piece (3) and the oil injection part (4) are close to the end face of the motor stator core when the oil injection ring (100) is arranged; the cooling oil separator (3) is used for uniformly dividing the oil injection part (4) into a plurality of oil injection grids (41) at intervals, and a plurality of oil injection holes (42) are formed in the oil injection grids (41).

2. A spray ring for a spray stator having a distribution of cooling oil as set forth in claim 1 wherein: when the fixing part (1) is installed, the outer circular surface of the fixing part is tightly attached to the inner circular surface of the motor base, and the outer circular surface of the oil spraying part (4) is tightly attached to the inner circular surface of the fixing part (1).

3. A spray ring for a spray stator having a distributed amount of cooling oil as claimed in claim 2 wherein: the cooling oil separator (3) comprises a plurality of cooling oil separating parts (31), and the plurality of cooling oil separating parts (31) are distributed in a uniformly-spaced annular shape to divide the oil spraying part (4) into a plurality of oil spraying grids (41).

4. A spray ring for a spray stator having a distributed amount of cooling oil as claimed in claim 3, wherein: the oil spraying part (4) is provided with a circumferential positioning part (5), the circumferential positioning part (5) is close to the end face of the motor stator core during installation, and the end face of the motor stator core is provided with a circumferential positioning groove for inserting the circumferential positioning part (5).

5. A spray ring for a spray stator having a distributed amount of cooling oil as defined in claim 4 wherein: the fixing part (1), the extrusion part (2), the cooling oil separating piece (3), the oil spraying part (4) and the circumferential positioning part (5) are integrally formed by materials with good toughness.

6. A spray ring for a spray stator having a distributed amount of cooling oil as defined in claim 5 wherein: extrusion piece (2) have certain toughness and can take place elastic deformation, extrusion piece (2) have a plurality ofly, a plurality of extrusion piece (2) are circumference evenly distributed on fixed part (1), extrusion piece (2) include two first extrusion portion (21), two first extrusion portion (21) set up side by side, two the one end that is close to fixed part (1) of first extrusion portion (21) all is connected with fixed part (1), two the one end that keeps away from fixed part (1) of first extrusion portion (21) all extends towards another first extrusion portion (21) direction mutual tilt up, two first extrusion portion (21) form open-top's trapezium structure, two form first recess (23) between first extrusion portion (21), can extrude deformation in first recess (23) towards when first extrusion portion (21) receive the pressure of motor end cover.

7. A spray ring for a spray stator having a distributed amount of cooling oil as defined in claim 4 wherein: the fixing part (1), the cooling oil separating piece (3), the oil spraying part (4) and the circumference positioning part (5) are made of materials with high strength and hard texture into a whole in a die-casting mode.

8. A spray ring for a spray stator having a distributed amount of cooling oil as defined in claim 7 wherein: the extrusion piece (2) has certain toughness and can elastically deform, the extrusion piece (2) has a plurality of, a plurality of extrusion pieces (2) are circumference evenly distributed on the fixed part (1), the extrusion piece (2) is an elastic ejector pin (25) with good toughness and elasticity, a plurality of installation counter bores (11) are formed in the fixed part (1) along the circumferential direction of the extrusion piece, the number of the installation counter bores (11) is consistent with the number of the elastic ejector pins (25), and the elastic ejector pins (25) are connected with the fixed part (1) through interference fit with the installation counter bores (11).

9. A spray ring for a spray stator having a distributed amount of cooling oil as defined in claim 4 wherein: the fixing part (1), the extrusion part (2) and the cooling oil separating piece (3) are molded by materials with good toughness, and the oil spraying part (4) and the circumferential positioning part (5) are integrally molded by materials with wide temperature resistance range, oil resistance and good strength; the fixing part (1), the extrusion part (2), the cooling oil separating piece (3), the oil spraying part (4) and the circumferential positioning part (5) are assembled into an integral oil spraying ring (100) structure in an embedded matching mode.

10. A spray ring for a spray stator having a distribution of cooling oil as set forth in claim 9 wherein: extrusion piece (2) have certain toughness and can take place elastic deformation, extrusion piece (2) have a plurality ofly, a plurality of extrusion piece (2) are circumference evenly distributed on fixed part (1), extrusion piece (2) include boss (26), two second extrusion portion (22), on fixed part (1) is installed to boss (26) bottom, two the bottom of second extrusion portion (22) sets up in the both sides at boss (26) top side by side, two the both ends that keep away from fixed part (1) of second extrusion portion (22) all upwards slope each other towards another second extrusion portion (22) direction extension, two second extrusion portion (22) form open-top trapezium structure, two form second recess (24) between second extrusion portion (22), extrusion deformation in second extrusion portion (22) can be oriented second recess (24) when receiving axial direction's pressure.