Motor oil injection hole control structure, motor and motor oil injection control method

Abstract

The present invention discloses a motor oil injection hole control structure, a motor and a motor oil injection control method. The motor oil injection hole control structure includes an oil collecting ring group, and the oil collecting ring group is used to be installed in the housing of the motor. The oil collecting ring group includes a sleeved first oil collecting ring and a second oil collecting ring, the first oil collecting ring is penetrated with a first oil injection hole, the second oil collecting ring is penetrated with a second oil injection hole, and the first oil collecting ring and the second oil collecting ring are relatively movable in the axial direction and / or the circumferential direction, so that the relative area of ​​the first oil injection hole and the second oil injection hole is variable. The motor includes the above-mentioned motor oil injection hole control structure. The technical solution provided by the present invention enables the motor to adjust the cooling effect according to the working needs, and effectively improves the working efficiency of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a motor oil injection hole control structure, a motor and a motor oil injection control method. Background Art

[0002] Lightweight design in motor technology and improving power density are the current development directions of motors. The motor generates heat continuously during operation, and the cooling technology of the motor is one of its core technologies. The cooling method of the motor is also constantly improving, and air-cooled, water-cooled, and oil-cooled motors are constantly appearing. Air-cooled motors are used in industrial motors or new energy automobile industries with small power requirements. Water cooling technology is a relatively mature technology at this stage and is widely used in various motor products; its cooling medium does not directly contact the heating element, and the cooling efficiency is relatively low. With the development of new energy, oil-cooled motors are constantly being introduced. Its advantage is that the medium can directly contact the heating components, directly cool the heating components, and has high efficiency; at the same time, the oil can lubricate the internal bearings of the motor, which can provide support for the design of high-speed motors.

[0003] The design of the cooling circuit of the oil-cooled motor is complex, and the oil circuit needs to consider the control of parameters such as oil pressure, flow rate, and flow rate. In the existing technology, the number of oil injection holes cannot be changed, and the change of oil volume can only be adjusted by the pressure of the external oil pump. The cooling effect of the motor can only be considered under limited working conditions, and the adjustability of the cooling effect is poor. Summary of the invention

[0004] The main purpose of the present invention is to provide a motor oil injection hole control structure, a motor and a motor oil injection control method, aiming to solve the problems that the number of oil injection holes cannot be changed, the change of oil volume can only be adjusted by the pressure of an external oil pump, the cooling effect of the motor can only consider limited working conditions, and the adjustability of the cooling effect is poor.

[0005] To achieve the above-mentioned purpose, the present invention proposes a motor oil injection hole control structure, a motor and a motor oil injection control method, wherein the motor oil injection hole control structure comprises an oil collecting ring group, the oil collecting ring group is used to be installed in the housing of the motor, the oil collecting ring group comprises a sleeved first oil collecting ring and a second oil collecting ring, the first oil collecting ring is provided with a first oil injection hole, the second oil collecting ring is provided with a second oil injection hole, the first oil collecting ring and the second oil collecting ring are relatively movable in the axial direction and / or the circumferential direction, so that the relative area of ​​the first oil injection hole and the second oil injection hole is variable. The motor comprises the above-mentioned motor oil injection hole control structure.

[0006] Optionally, the inner diameter of a single first oil injection hole is greater than or equal to the inner diameter of a single second oil injection hole, and when the first oil collecting ring and the second oil collecting ring move relatively to a preset position, one first oil injection hole corresponds to a plurality of second oil injection holes with different inner diameters in sequence; and / or,

[0007] The inner diameter of a single first oil spray hole is greater than or equal to the inner diameter of a single second oil spray hole. When the first oil collecting ring and the second oil collecting ring move relatively to a preset position, one first oil spray hole corresponds in sequence to multiple second oil spray hole groups consisting of different numbers of the second oil spray holes.

[0008] The present invention also provides a motor, comprising a casing with an oil inlet, the motor oil spray hole control structure as described above, and a stator winding, wherein the oil collecting ring group of the motor oil spray hole control structure is installed in the casing, the oil collecting ring group is sealed and connected to the casing in the axial direction, the oil collecting ring group is spaced apart from the casing in the circumferential direction to form a cooling oil chamber between the outer side of the oil collecting ring group and the casing, the inner area of ​​the oil collecting ring group forms a accommodating chamber, the cooling oil chamber is connected to the oil inlet, and the accommodating chamber is used to connect to the oil collecting tank of the motor; the stator winding is arranged in the accommodating chamber.

[0009] Optionally, the motor includes a stator and two stator windings respectively arranged at both ends of the stator, the motor oil spray hole control structure is provided with two, the two motor oil spray hole control structures include two oil collecting ring groups to form two cooling oil chambers and two accommodating chambers correspondingly, the two stator windings are respectively arranged in the two accommodating chambers, an oil channel is provided in the axial direction of the casing, and the two cooling oil chambers are connected through the oil channel.

[0010] Optionally, the motor further comprises:

[0011] A driving device, driving the first oil collecting ring and / or the second oil collecting ring to move;

[0012] a temperature sensor for collecting the temperature of the stator winding; and

[0013] The controller is electrically connected to the driving device and the temperature sensor respectively.

[0014] Optionally, two axial ends of the second oil collecting ring are provided with control oil chambers for pushing the second oil collecting ring to move axially through the oil pressure difference between the two control oil chambers.

[0015] Optionally, the casing includes a cylindrical shell body and end covers arranged at both ends of the cylindrical shell body, the first oil collecting ring is provided with a mounting groove with an opening, the second oil collecting ring is movably installed in the mounting groove, the opening of the mounting groove faces the end cover and is sealed with the end cover, one of the control oil chambers is formed between the bottom of the mounting groove and the second oil collecting ring, and the other control oil chamber is formed between the second oil collecting ring and the end cover.

[0016] Optionally, the driving device includes a circumferential driving device, which drives the second oil collector to rotate around the axial direction.

[0017] The present invention also provides a motor fuel injection control method based on the above motor, wherein the motor further comprises a driving device and a controller, wherein the driving device drives the first oil collecting ring and / or the second oil collecting ring to move, and the controller is electrically connected to the driving device. The motor fuel injection control method comprises:

[0018] Get the working parameters of the motor;

[0019] According to the working parameters, the driving device is controlled to drive the first oil collecting ring and / or the second oil collecting ring to move.

[0020] Optionally, the motor further includes a temperature sensor, which is used to collect the temperature of the stator winding of the motor. The operating parameters of the motor include the temperature of the stator winding, the rotational speed of the motor and / or the current of the motor.

[0021] In the technical solution of the present invention, the motor oil injection hole control structure includes an oil collecting ring group, the oil collecting ring group is used to be installed in the housing of the motor, the oil collecting ring group includes a sleeved first oil collecting ring and a second oil collecting ring, the first oil collecting ring is provided with a first oil injection hole, the second oil collecting ring is provided with a second oil injection hole, the first oil collecting ring and the second oil collecting ring are relatively movable in the axial direction and / or the circumferential direction, so that the relative area of ​​the first oil injection hole and the second oil injection hole is changed. By relatively movable in the axial direction and / or the circumferential direction, the relative area of ​​the first oil injection hole and the second oil injection hole is changed, so that the oil passing area of ​​the oil collecting ring group is changed, and the flow rate, flow velocity, pressure and other parameters of the cooling oil are adjusted, so as to control the cooling effect of the heat-generating components, so that the motor can adjust the cooling effect according to the working needs, and effectively improve the working efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of an exploded structure of an embodiment of a motor provided by the present invention;

[0024] Figure 2 for Figure 1 A schematic cross-sectional view of the structure of the motor;

[0025] Figure 3 for Figure 2 A magnified schematic diagram of the local A in the middle;

[0026] Figure 4 for Figure 1 A three-dimensional schematic diagram of the structure of the first oil collecting ring;

[0027] Figure 5 for Figure 1 A three-dimensional schematic diagram of the structure of the second oil collecting ring;

[0028] Figure 6 for Figure 1 A three-dimensional schematic diagram of the structure of the stator;

[0029] Figure 7 for Figure 1 A three-dimensional schematic diagram of the structure of the shell body;

[0030] Figure 8 for Figure 1 A three-dimensional schematic diagram of the structure of the end cover;

[0031] Fig. 9 A schematic flow chart of an embodiment of the motor fuel injection control method provided by the present invention.

[0032] Description of Figure Numbers:

[0033] Label name Label name 100 Motor 21 Oil channel 10 Motor oil injection hole control structure 22 Shell body 1 Oil collecting ring 23 End caps 11 First oil collecting ring 24 Oil inlet 111 First injection hole 30 Stator winding 112 Mounting slot 40 Cooling oil chamber 12 Second oil ring 50 Accommodation cavity 121 Second injection hole 60 stator 13 Fuel injection port 70 Control oil chamber 20 chassis

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] Lightweight design in motor technology and improving power density are the current development directions of motors. The motor generates heat continuously during operation, and the cooling technology of the motor is one of its core technologies. The cooling method of the motor is also constantly improving, and air-cooled, water-cooled, and oil-cooled motors are constantly appearing. Air-cooled motors are used in industrial motors or new energy automobile industries with small power requirements. Water cooling technology is a relatively mature technology at this stage and is widely used in various motor products; its cooling medium does not directly contact the heating element, and the cooling efficiency is relatively low. With the development of new energy, oil-cooled motors are constantly being introduced. Its advantage is that the medium can directly contact the heating components, directly cool the heating components, and has high efficiency; at the same time, the oil can lubricate the internal bearings of the motor, which can provide support for the design of high-speed motors.

[0039] The design of the cooling circuit of the oil-cooled motor is complex, and the oil circuit needs to consider the control of parameters such as oil pressure, flow rate, and flow rate. In the existing technology, the number of oil injection holes cannot be changed, and the change of oil volume can only be adjusted by the pressure of the external oil pump. The cooling effect of the motor can only be considered under limited working conditions, and the adjustability of the cooling effect is poor.

[0040] In view of this, the present invention provides a motor oil injection hole control structure, a motor and a motor oil injection control method, so that the motor can adjust the cooling effect according to working needs, and effectively improve the working efficiency of the motor. Figures 1 to 8 This is an embodiment of a motor provided by the present invention. Fig. 9 This is an embodiment of the motor fuel injection control method provided by the present invention.

[0041] In an embodiment of the present invention, please refer to the accompanying drawings. The motor oil injection hole control structure 10 includes an oil collecting ring group 1, and the oil collecting ring group 1 is used to be installed in the casing 20 of the motor 100. The oil collecting ring group 1 includes a first oil collecting ring 11 and a second oil collecting ring 12. The first oil collecting ring 11 is penetrated by a first oil injection hole 111, and the second oil collecting ring 12 is penetrated by a second oil injection hole 121. The first oil collecting ring 11 and the second oil collecting ring 12 are relatively movable in the axial direction and / or the circumferential direction so that the relative areas of the first oil injection hole 111 and the second oil injection hole 121 are variable.

[0042] In the technical solution of the present invention, the first oil collecting ring 11 and the second oil collecting ring 12 are relatively movable in the axial direction and / or the circumferential direction, so that the relative area of ​​the first oil injection hole 111 and the second oil injection hole 121 changes, thereby changing the oil flow area of ​​the oil collecting ring group 1, adjusting the flow rate, flow velocity, pressure and other parameters of the cooling oil, thereby controlling the cooling effect of the heat-generating components, allowing the motor 100 to adjust the cooling effect according to working needs, and effectively improving the working efficiency of the motor 100.

[0043] The present invention does not limit the specific implementation method of the change in the relative area of ​​the first fuel injection hole 111 and the second fuel injection hole 121. The first fuel injection hole 13 and the second fuel injection hole 121 can have the same inner diameter, and the relative area is changed by staggering (partially relative, partially staggered). In this embodiment, the inner diameter of a single first fuel injection hole 111 is greater than or equal to the inner diameter of a single second fuel injection hole 121. When the first oil collecting ring 11 and the second oil collecting ring 12 move relatively to a preset position, one first fuel injection hole 111 corresponds to a plurality of second fuel injection holes 121 with different inner diameters in sequence, that is, the relative area of ​​the first fuel injection hole 111 and the second fuel injection hole 121 is changed by changing the inner diameters of the plurality of second fuel injection holes 121 to control the oil flow area.

[0044] In another embodiment, as shown in the accompanying drawings, the inner diameter of a single first fuel injection hole 111 is greater than or equal to the inner diameter of a single second fuel injection hole 121, and when the first oil collecting ring 11 and the second oil collecting ring 12 move relatively to a preset position, one first fuel injection hole 111 corresponds in sequence to a plurality of second fuel injection hole 121 groups consisting of different numbers of the second fuel injection holes 121, that is, the relative areas of the first fuel injection hole 111 and the second fuel injection hole 121 are changed by changing the number of the second fuel injection holes 121 included in the second fuel injection hole 121 group to control the oil flow area.

[0045] Of course, the above two methods can also be used in combination, and the present invention does not limit it. By making the inner diameter of the first fuel injection hole 111 greater than or equal to the inner diameter of a single second fuel injection hole 121, one first fuel injection hole 111 corresponds to the setting of different inner diameters or different numbers of second fuel injection holes 121. Compared with the first fuel injection hole 111 and the second fuel injection hole 121 being staggered (partially opposite, partially staggered), the oil flow area of ​​the cooling oil in the above two methods is the area of ​​the second fuel injection hole 121, and the control of the oil amount is more accurate and reliable.

[0046] The present invention also provides a motor 100, which includes a casing 20 with an oil inlet 24, the motor oil injection hole control structure 10 as described above, and a stator winding 30. The oil collecting ring group 1 of the motor oil injection hole control structure 10 is installed in the casing 20, and the oil collecting ring group 1 is sealed and connected to the casing 20 in its axial direction. The oil collecting ring group 1 is spaced apart from the casing 20 in its circumferential direction to form a cooling oil chamber 40 between the outer side of the oil collecting ring group 1 and the casing 20, and the inner area of ​​the oil collecting ring group 1 forms a accommodating chamber 50, the cooling oil chamber 40 is connected to the oil inlet 24, and the accommodating chamber 50 is used to connect to the oil collecting pool (not shown in the figure) of the motor 100; the stator winding 30 is arranged in the accommodating chamber 50. The specific structure of the motor oil injection hole control structure 10 refers to the above-mentioned embodiment. Since the motor 100 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here. The cooling oil enters the cooling oil chamber 40 from the oil inlet 24 penetrating the housing 20, and after the oil collecting ring group 1 adjusts the oil passing area, it enters the accommodating chamber 50 and sprays on the stator winding 30, taking away the heat of the stator winding 30. The hot cooling oil flows into the oil collecting pool of the motor 100, and then the temperature drops after the filter filters the impurities and the heat is taken away by the heat exchanger. Under the action of the oil pump, it flows into the oil inlet 24 again to repeat the above-mentioned spray cooling process. It should be noted that the description of the external circulation process of the cooling oil here is only used to assist in understanding the oil cooling process of the motor 100, and the present invention does not make specific limitations on this.

[0047] Furthermore, the motor 100 includes a stator 60 and two stator windings 30 respectively arranged at both ends of the stator 60, the motor oil spray hole control structure 10 is provided with two, the two motor oil spray hole control structures 10 include two oil collecting ring groups 1 to form two cooling oil chambers 40 and two accommodating chambers 50 respectively, the two stator windings 30 are respectively arranged in the two accommodating chambers 50, the casing 20 is provided with an oil channel 21 in the axial direction, and the two cooling oil chambers 40 are connected through the oil channel 21. In this way, the two motor oil injection hole control structures 10 include two oil collecting ring groups 1, and the two oil collecting ring groups 1 respectively have oil injection ports 13 formed by the first oil injection hole 111 and the second oil injection hole 121 facing each other. The cooling oil flows from the oil inlet 24 into one of the two cooling oil chambers 40 through an external oil pump. In the cooling oil chamber 40, the cooling oil is divided into two flow channels. One of the two flow channels is sprayed from the corresponding oil injection port 13 to the corresponding stator winding 30 to cool the stator winding 30 and finally flows back to the oil collecting pool of the motor 100; the other of the two flow channels is sprayed from the corresponding oil injection port 13 to the corresponding stator winding 30 to cool the stator winding 30 and finally flows back to the oil collecting pool of the motor 100. The oil channel 21 flows into another cooling oil chamber 40, is sprayed from the corresponding oil injection port 13 to the corresponding stator winding 30, cools the stator winding 30, and finally flows back to the oil collecting tank of the motor 100. With this arrangement, the two stator windings 30 are cooled at the same time, and only one oil inlet 24 is provided, which has a relatively simple structure. The cooling oil flowing through the oil channel 21 can take away the heat of the stator 60, which is beneficial to the cooling of the stator 60. Of course, generally speaking, the stator winding 30 generates more heat, and the main temperature control of the stator winding 30 can achieve the technical effect of adjusting the cooling effect of the motor 100 according to working needs.

[0048] In this embodiment, the motor 100 further includes a driving device, a temperature sensor and a controller. The driving device drives the first oil collecting ring 11 and / or the second oil collecting ring 12 to move; the temperature sensor collects the temperature of the stator winding 30; and the controller is electrically connected to the driving device and the temperature sensor respectively. In this configuration, the temperature of the two stator windings 30 is monitored in real time, and the monitored winding temperature is fed back to the controller. The controller performs temperature analysis to determine whether the oil injection amount needs to be adjusted. If the oil amount needs to be adjusted, the controller controls the driving device to drive the first oil collecting ring 11 and / or the second oil collecting ring 12 to move so that the relative area of ​​the first oil injection hole 111 and the second oil injection hole 121 reaches a preset value, thereby adjusting the oil injection amount and the oil injection speed, achieving a better cooling effect, and thus improving the working efficiency of the motor 100. The configuration of the driving device, the temperature sensor and the controller makes the oil injection control more efficient and intelligent.

[0049] Furthermore, control oil chambers 70 are provided at both ends of the second oil collecting ring 12 in the axial direction, so as to push the second oil collecting ring 12 to move axially through the oil pressure difference between the two control oil chambers 70. With such a configuration, the second oil collecting ring 12 can move axially in a straight line, with fast starting, smooth movement, small switching shock, and better adjustment performance, which is beneficial to ensuring the accuracy of cooling effect adjustment.

[0050] Specifically, the casing 20 includes a cylindrical casing body 22 and end covers 23 arranged at both ends of the cylindrical casing body 22, the first oil collecting ring 11 is provided with a mounting groove 112 with an opening, the second oil collecting ring 12 is movably installed in the mounting groove 112, the opening of the mounting groove 112 faces the end cover 23 and is sealed and connected to the end cover 23, one of the control oil chambers 70 is formed between the bottom of the mounting groove 112 and the second oil collecting ring 12, and the other control oil chamber 70 is formed between the second oil collecting ring 12 and the end cover 23. In this way, the first oil collecting ring 11 is provided with a mounting groove 112 with an opening, and the second oil collecting ring 12 is movably installed in the mounting groove 112, which is beneficial to the installation and movement guiding of the second oil collecting ring 12. The casing 20 includes a cylindrical casing body 22 and end covers 23 provided at both ends of the cylindrical casing body 22, which is beneficial to the production of the casing 20 and the assembly with the oil collecting ring group 1. One of the control oil chambers 70 is formed between the bottom of the mounting groove 112 and the second oil collecting ring 12, and the other control oil chamber 70 is formed between the second oil collecting ring 12 and the end cover 23. The two control oil chambers 70 are formed by utilizing the assembly gap, and there is no need to add additional structure or open a cavity on the existing structure. The overall structure is simple, which reduces the manufacturing cost of the motor 100 and improves the assembly efficiency.

[0051] In another embodiment, the driving device includes a circumferential driving device, which drives the second oil collecting ring 12 to rotate axially. The present invention does not limit the circumferential driving device. Specifically, a servo motor can be used to drive the servo motor. The servo motor rotates under the control of the controller, and the rotation of the servo motor is converted into the swing of the driving rod through the crank-connecting rod mechanism. The second oil collecting ring 12 is then connected and driven through the driving rod, so as to drive the second oil collecting ring 12 to rotate axially.

[0052] The present invention further provides a motor fuel injection control method based on the motor 100, wherein the motor 100 further includes a driving device and a controller, wherein the driving device drives the first oil collecting ring 11 and / or the second oil collecting ring 12 to move, and the controller is electrically connected to the driving device. The motor fuel injection control method includes:

[0053] Step S100: obtaining the working parameters of the motor 100;

[0054] Step S200: According to the working parameters, controlling the driving device to drive the first oil collecting ring 11 and / or the second oil collecting ring 12 to move.

[0055] In this embodiment, the driving device is controlled according to the working parameters of the motor 100 to drive the first oil collecting ring 11 and / or the second oil collecting ring 12 to move, so that the relative area of ​​the first oil injection hole 111 and the second oil injection hole 121 reaches a preset value, so that the cooling effect of the motor 100 is changed according to the working condition of the motor 100, thereby improving the working efficiency of the motor 100 by adjusting the cooling effect to a more matched state.

[0056] Furthermore, the motor 100 also includes a temperature sensor, which is used to collect the temperature of the stator winding 30 of the motor 100. The operating parameters of the motor 100 include the temperature of the stator winding 30, the rotational speed of the motor 100 and / or the current of the motor 100. The introduction of multiple operating parameters further improves the matching degree between the cooling effect of the motor 100 and the working condition of the motor 100, thereby ensuring the working efficiency of the motor 100.

[0057] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made based on the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A motor oil injection hole control structure, characterized in that: include: An oil collecting ring group is used to be installed in the casing of the motor, and the oil collecting ring group includes a first oil collecting ring and a second oil collecting ring that are sleeved. The first oil collecting ring is penetrated with a first oil spray hole, and the second oil collecting ring is penetrated with a second oil spray hole. The first oil collecting ring and the second oil collecting ring are relatively movable in the axial direction and / or the circumferential direction so that the relative areas of the first oil spray hole and the second oil spray hole are variable.

2. The motor oil injection hole control structure according to claim 1, characterized in that: The inner diameter of a single first oil injection hole is greater than or equal to the inner diameter of a single second oil injection hole, and when the first oil collecting ring and the second oil collecting ring move relatively to a preset position, one first oil injection hole corresponds to a plurality of second oil injection holes with different inner diameters in sequence; and / or, The inner diameter of a single first oil spray hole is greater than or equal to the inner diameter of a single second oil spray hole. When the first oil collecting ring and the second oil collecting ring move relatively to a preset position, one first oil spray hole corresponds in sequence to multiple second oil spray hole groups consisting of different numbers of the second oil spray holes.

3. A motor, characterized in that: The motor comprises: The casing is provided with an oil inlet; The motor oil injection hole control structure according to claim 1 or 2, wherein the oil collecting ring group of the motor oil injection hole control structure is installed in the casing, the oil collecting ring group is sealed and connected to the casing in the axial direction, and the oil collecting ring group is spaced from the casing in the circumferential direction to form a cooling oil cavity between the outer side of the oil collecting ring group and the casing, and the inner area of ​​the oil collecting ring group forms a accommodating cavity, the cooling oil cavity is connected to the oil inlet, and the accommodating cavity is used to connect to the oil collecting tank of the motor; and, The stator winding is arranged in the accommodating cavity.

4. The motor according to claim 3, characterized in that The motor includes a stator and two stator windings respectively arranged at two ends of the stator. The motor oil spray hole control structure is provided with two. The two motor oil spray hole control structures include two oil collecting ring groups to form two cooling oil chambers and two accommodating chambers respectively. The two stator windings are respectively arranged in the two accommodating chambers. An oil channel is provided in the axial direction of the casing, and the two cooling oil chambers are connected through the oil channel.

5. The motor according to claim 3, characterized in that The motor also includes: A driving device, driving the first oil collecting ring and / or the second oil collecting ring to move; a temperature sensor for collecting the temperature of the stator winding; and The controller is electrically connected to the driving device and the temperature sensor respectively.

6. The motor according to claim 5, characterized in that Control oil chambers are provided at both ends of the second oil collecting ring in the axial direction, so as to push the second oil collecting ring to move in the axial direction through the oil pressure difference between the two control oil chambers.

7. The motor according to claim 6, characterized in that The casing includes a cylindrical casing body and end covers arranged at both ends of the cylindrical casing body, the first oil collecting ring is provided with a mounting groove with an opening, the second oil collecting ring is movably installed in the mounting groove, the opening of the mounting groove faces the end cover and is sealed with the end cover, one of the control oil chambers is formed between the bottom of the mounting groove and the second oil collecting ring, and the other control oil chamber is formed between the second oil collecting ring and the end cover.

8. The motor according to claim 7, characterized in that The driving device comprises a circumferential driving device for driving the second oil collector to rotate around an axial direction.

9. A motor fuel injection control method, characterized in that: Based on the motor according to claim 3, the motor further comprises a driving device and a controller, the driving device drives the first oil collecting ring and / or the second oil collecting ring to move, the controller is electrically connected to the driving device, and the motor injection control method comprises: Get the working parameters of the motor; According to the working parameters, the driving device is controlled to drive the first oil collecting ring and / or the second oil collecting ring to move.

10. The motor fuel injection control method according to claim 9, characterized in that: The motor further includes a temperature sensor, which is used to collect the temperature of the stator winding of the motor. The operating parameters of the motor include the temperature of the stator winding, the rotation speed of the motor, and / or the current of the motor.

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