A balancing plate, a rotor and a motor
By setting up oil barriers on the balance plate, centrifugal force is used to promote oil cooling, and simplify assembly by cooperating with the pressure ring, the problems of uneven cooling and complex assembly in the motor are solved, achieving more efficient cooling and more convenient assembly.
Patent Information
- Application Number
- CN202421501413.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-06-27
AI Technical Summary
In existing motors, the cooling of the stator end wire pack is uneven, and the difference in oil volume leads to uneven cooling. High-speed spraying of the oil outlet hole of the rotor hollow shaft may cause the line pack to be impregnated paint film and copper enameled wire to fall off, and it is troublesome to assemble the balance plate and the motor shaft intersect.
Multiple oil barrier sheets are installed on the balance plate. The oil barrier sheet throws the oil back to the stator wire bag under the action of centrifugal force to promote cooling; at the same time, the oil barrier sheet buffers and reduces the impact on the wire bag; the balance plate cooperates with the pressure ring to improve assembly convenience.
Faster and even cooling of the stator wire pack is achieved, reducing the risk of wire pack impregnation and enameled wire falling off, and simplifying the assembly process of the balance board.
Smart Images
Figure CN222750289U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and in particular to a balancing plate, a rotor and a motor. Background Art
[0002] During the cooling process of the existing stator end coil, the oil on the coil is gathered and then flows to the bottom of the motor in the direction of its own gravity. In the direction of gravity and at different heights, there are differences in oil volume and uneven cooling. In addition, the oil dripping flow rates of the oil holes of the front / rear oil guide rings of the stator in the direction of gravity are different, and there may be no dripping at the bottom in the direction of gravity, further leading to uneven oil cooling at various parts of the coil.
[0003] In addition, in the rotor assembly, there is also a vertical axis hole on the oil outlet hole of the hollow shaft, which sprays and cools the wire package during high-speed rotation. When the impact force is large, the wire package impregnation paint film and copper enameled wire are at risk of falling off.
[0004] In addition, the existing balance plate and the motor shaft have an interference fit, which makes assembly difficult and causes aluminum cutting problems at the chamfered corners when the balance plate is inserted into the shaft. Summary of the invention
[0005] In order to solve the above problems, the first purpose of the utility model is to provide a balancing plate. By arranging an oil baffle on the balancing plate, the oil baffle can be thrown back onto the stator winding package under the action of centrifugal force, so that the stator winding package can be fully cooled; at the same time, the oil thrown out of the oil outlet on the motor shaft is buffered and decelerated by the oil baffle to reduce the impact on the stator winding package; the second purpose of the utility model is to provide a rotor having the above-mentioned balancing plate, and the balancing plate is assembled on the pressure ring, thereby improving the assembly convenience of the balancing plate; the third purpose of the utility model is to provide a motor having the above-mentioned rotor equipped with a balancing plate.
[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:
[0007] A balancing plate, characterized in that: the balancing plate is an annular plate body, and a plurality of oil baffles are extended outwardly from one end surface of the balancing plate, and the plurality of oil baffles are arranged along the same circumferential line; an angle γ is formed between the line connecting the bottom outer end of the oil baffle and the axis of the motor shaft and the oil baffle, and the γ=20~70°, and oil ports are formed between adjacent oil baffles.
[0008] In the above technical solution, a plurality of oil baffles are arranged on the end face of the balance plate between the oil outlet and the stator winding package. The cooling oil on the stator winding package drips onto the outer surface of the oil baffle in the direction of its own gravity. The centrifugal force generated by the oil baffle when rotating at high speed with the motor shaft causes the oil to splash onto the winding package again. This cycle is repeated until the oil reaches the bottom of the winding package in the direction of gravity, thereby promoting faster and more uniform cooling of the winding package. In addition, the gravity direction is dripping, and the circulating oil density of the trajectory of the circular winding package on the winding package is relatively low, which results in a long individual circulation time. The above structure can increase the trajectory oil density of the circular winding package, fully lubricate and reduce the flow resistance of the winding package R, and accelerate the oil iterative cycle more efficiently.
[0009] In addition, the oil coming out of the oil outlet hole is gathered on the inner side of the oil baffle and thrown out for the second time on the inner side of the oil baffle to cool the wire package and play an intermediate buffering role. The close distance to the wire package greatly reduces the impact on the wire package impregnation paint film and copper enameled wire.
[0010] The oil baffle is set at a certain angle so that the outer side and inner side of the oil baffle can respectively play a good role in the oil dripping from the stator coil and the oil spraying from the oil outlet. The displacement of the oil baffle is represented by the angle γ formed between the line between the bottom outer end of the oil baffle and the motor shaft center and the oil baffle. The effect is acceptable when γ is between 20 and 70 degrees.
[0011] Preferably, the plurality of oil baffles are integrally formed with the balance plate. In this technical solution, the plurality of oil baffles are integrally formed with the balance plate, so that the structure of the plurality of oil baffles is stable and not easily damaged.
[0012] Preferably, the cross section of the oil baffle is in the shape of an equilateral trapezoid, and the width of the oil baffle gradually decreases from the lower end to the upper end. In this technical solution, the width of the oil baffle gradually decreases from the lower end to the upper end, so that the lower end of the oil baffle is wider and more stable, and the upper end is narrower, which is not easy to shake when rotating, and is stable and not easy to break.
[0013] Preferably, the outer end of the oil baffle is constructed as an oil-conducting cambered surface. In this technical solution, the oil from the oil outlet hole on the motor shaft can be thrown onto the stator coil package through the oil-conducting cambered surface after passing through the inner side of the oil baffle. The oil is discharged in a certain arc to avoid linear impact and further play a certain buffering role.
[0014] Preferably, the bottom of the oil baffle plate and the balance plate have an arc transition. In this technical solution, the arc transition between the bottom of the oil baffle plate and the balance plate makes the structural strength of the two higher when they are formed, further improving the structural stability of the oil baffle plate.
[0015] Preferably, the oil baffles are arranged with 15 pieces. In this technical solution, 15 pieces of oil baffles are arranged in this case, so that the oil cooling in this case can achieve the expected effect, and the number of oil baffles can be changed according to conditions such as the actual motor size.
[0016] A rotor comprises a motor shaft and a rotor core sleeved on the motor shaft, characterized in that it also comprises a balancing plate as described in any one of the above, the balancing plate is sleeved on the motor shaft and adhered to both sides of the rotor core.
[0017] Preferably, a pressure ring is sleeved on the motor shaft, which is interference-connected with the motor shaft and is located between the outer end face of the balance plate and the oil outlet hole; a gap is formed between the center hole of the balance plate and the motor shaft, and a number of bosses are axially formed between the center hole of the balance plate and the multiple oil baffles, and the pressure ring fits the outer end face of the balance plate and a number of mounting holes are opened on the pressure ring, which are respectively tightly connected with the bosses. In this technical solution, the balance plate and the motor shaft are no longer interference-fitted, and the bosses on the balance plate cooperate with the assembly holes on the original pressure ring, so that the balance plate can rotate with the motor shaft and the pressure ring, so that the center hole on the balance plate does not need to be processed by precision turning, but can be realized by casting blanks, which reduces costs, and at the same time solves the problem of aluminum cutting edges at the chamfer when the pressure ring and the motor shaft are inserted into the shaft during the interference fit assembly process, thereby improving cleanliness.
[0018] A motor, including a stator, characterized in that: it is also a rotor as described above, the rotor is arranged inside the stator, the stator includes a stator core and a stator winding package installed on the stator core, the two ends of the stator winding package extend out of the outer end surfaces of the balance plates on both sides, and the axial outer end of the oil baffle extends out of the axial outer end of the stator winding package; the two axial ends of the stator core are provided with oil guide rings located at the outer periphery of the two ends of the stator winding package, and the oil guide ring is provided with oil guide holes that communicate with the oil channel on the stator core; the motor shaft is provided with a plurality of oil outlet holes on the outer side of the balance plate. In an oil-cooled motor, the oil channel on the stator core sprays the stator winding package to the oil guide holes on the oil guide ring, and the oil outlet holes on the motor shaft of the rotor spray the stator winding package. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of a motor.
[0020] Figure 2 Schematic diagram of the arrangement of the oil baffle in the motor.
[0021] Figure 3 Schematic diagram of the position of the stator winding package, oil outlet hole and oil baffle.
[0022] Figure 4 A schematic diagram of the three-dimensional structure of a rotor.
[0023] Figure 5 This is a schematic diagram of the assembly of the balance plate and the motor shaft.
[0024] Figure 6 Schematic diagram of the three-dimensional structure of the balance board.
[0025] Figure 7 Schematic diagram of the top view of the balance board.
[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the pressure ring. DETAILED DESCRIPTION
[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.
[0030] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Embodiment 1:
[0032] like Figure 6-7 A balancing plate is shown, wherein the balancing plate 3 is an annular plate body, and a plurality of oil baffles 9 are extended outwardly from one end surface of the balancing plate 3, and the axial outer end of the oil baffle 9 extends out of the axial outer end of the stator winding 5; the plurality of oil baffles 9 are arranged along the same circumferential line; an angle γ is formed between the line connecting the bottom outer end of the oil baffle 9 and the axis of the motor shaft 1 and the oil baffle 9, and the γ=20~70°, and an oil port 10 is formed between adjacent oil baffles 9.
[0033] In the above technical scheme, a plurality of oil baffles are axially arranged on the outer end surface of the balance plate, which are located between the oil outlet and the stator winding package. The cooling oil on the stator winding package drips onto the outer surface of the oil baffle in the direction of its own gravity. The centrifugal force generated by the oil baffle when rotating at high speed with the motor shaft causes the oil to splash onto the winding package again, and this reciprocating cycle is repeated until the oil reaches the bottom of the winding package in the direction of gravity, thereby promoting faster and more uniform cooling of the winding package. In addition, the gravity direction is dripping, and the circulating oil density of the trajectory of the circular winding package on the winding package is relatively low, which results in a long individual circulation time. The above structure can increase the trajectory oil density of the circular winding package, fully lubricate and reduce the flow resistance of the winding package R, and accelerate the oil iterative cycle more efficiently.
[0034] In addition, the oil coming out of the oil outlet hole is gathered on the inner side of the oil baffle and thrown out for the second time on the inner side of the oil baffle to cool the wire package and play an intermediate buffering role. The close distance to the wire package greatly reduces the impact on the wire package impregnation paint film and copper enameled wire.
[0035] The oil baffle is set at a certain angle so that the outer side and inner side of the oil baffle can respectively play a good role in the oil dripping from the stator coil and the oil spraying from the oil outlet. The displacement of the oil baffle is represented by the angle γ formed between the line between the bottom outer end of the oil baffle and the motor shaft center and the oil baffle. The effect is acceptable when γ is between 20 and 70 degrees.
[0036] Furthermore, the plurality of oil baffles 9 are integrally formed with the balance plate 3. In this technical solution, the plurality of oil baffles 9 are integrally formed with the balance plate so that the structure of the plurality of oil baffles is stable and not easily damaged.
[0037] Furthermore, the cross section of the oil baffle 9 is in the shape of an equilateral trapezoid, and the width of the oil baffle 9 gradually decreases from the lower end to the upper end. In this technical solution, the width of the oil baffle 9 gradually decreases from the lower end to the upper end, so that the lower end of the oil baffle is wider and more stable, and the upper end is narrow, which is not easy to shake when rotating, and is stable and not easy to break.
[0038] Furthermore, the outer end of the oil baffle 9 is constructed as an oil guide arc surface 11. In this technical solution, the oil from the oil outlet hole on the motor shaft can be thrown onto the stator coil package through the oil guide arc surface after passing through the inner side of the oil baffle. The oil is discharged in a certain arc to avoid linear impact and further play a certain buffering role.
[0039] Furthermore, there is an arc transition between the bottom of the oil baffle 9 and the balance plate 3. In this technical solution, the arc transition between the bottom of the oil baffle and the balance plate makes the structural strength of the two higher during molding, further improving the structural stability of the oil baffle.
[0040] Furthermore, there are 15 oil baffles 9. In this technical solution, 15 oil baffles are arranged in this case, so that the oil cooling in this case can achieve the expected effect, and the number of oil baffles can be changed according to conditions such as the actual motor size. Embodiment 2:
[0041] like Figure 4 , 5 A rotor of and 8, comprising a motor shaft 1 and a rotor core 2 sleeved on the motor shaft 1, characterized in that: it also includes a balancing plate of implementation one, the balancing plate 3 is sleeved on the motor shaft 1 and adheres to both sides of the rotor core 2.
[0042] Furthermore, a pressing ring 12 is sleeved on the motor shaft 1, and the pressing ring 12 is interference-connected with the motor shaft 1 and is located between the outer end surface of the balance plate 3 and the oil outlet hole 8; a gap 13 is formed between the center hole 14 of the balance plate and the motor shaft 1, and a plurality of bosses 15 are axially formed between the center hole 14 of the balance plate and the plurality of oil baffles 9, and the pressing ring 12 fits the outer end surface of the balance plate 3 and a plurality of mounting holes 16 are provided on the pressing ring 12, which are respectively tightly connected with the plurality of bosses 15. In this technical solution, the balance plate and the motor shaft are no longer interference-fitted, and the bosses on the balance plate are matched with the assembly holes on the original pressing ring, so that the balance plate can rotate with the motor shaft and the pressing ring, so that the center hole on the balance plate does not need to be processed by precision turning, but can be realized by casting blanks, which reduces costs, and at the same time solves the aluminum cutting problem at the chamfer when the pressing ring and the motor shaft are inserted into the shaft during the interference-fit assembly process, thereby improving cleanliness. Embodiment three:
[0043] like Figures 1 to 3 A motor shown includes a stator and a rotor in the second embodiment, wherein the rotor is arranged inside the stator, and the stator includes a stator core 4 and a stator coil 5 mounted on the stator core 4, wherein both ends of the stator coil 5 extend out of the outer end surfaces of the balance plates 3 on both sides, and the axial outer ends of the oil baffles 9 extend out of the axial outer ends of the stator coil 5; both axial ends of the stator core 4 are provided with oil guide rings 6 located at the outer periphery of both ends of the stator coil 5, and the oil guide rings 6 are provided with oil guide holes communicating with the oil passages 7 on the stator core 4; and a plurality of oil outlet holes 8 are opened on the motor shaft 1 on the outer side of the balance plate 3. In an oil-cooled motor, the oil passages on the stator core to the oil guide holes on the oil guide rings spray cool the stator coil, and the oil outlet holes on the motor shaft of the rotor discharge oil to spray cool the stator coil.
[0044] In this specific embodiment, in order to solve the problems of uneven cooling of the stator winding in the existing oil-cooled motor and the high-speed impact of the oil outlet holes on the motor shaft on the stator winding, which easily causes the winding impregnation paint film and the shedding of the copper enameled wire, the above scheme arranges a circle of oil baffles axially on the balance plate, and the cooling oil on the stator winding drips onto the outer surface of the oil baffles in the direction of its own gravity. The centrifugal force generated by the oil baffles when rotating at high speed with the motor shaft causes the oil to splash onto the winding again, and this cycle is repeated until the oil reaches the bottom of the winding in the direction of gravity, so that the winding cooling is faster and more uniform; and the gravity direction is dripping, and the circulating oil density of the track around the circular winding on the winding is relatively low, which leads to a long individual cycle time; the above structure can increase the track oil density of the circular winding, fully lubricate and reduce the flow resistance of the winding R, and accelerate the oil iterative cycle more efficiently.
[0045] In addition, the oil coming out of the oil outlet hole is gathered on the inner side of the oil baffle and thrown out for the second time on the inner side of the oil baffle to cool the wire package and play an intermediate buffering role. The close distance to the wire package greatly reduces the impact on the wire package impregnation paint film and copper enameled wire.
[0046] In addition, the boss on the balance plate cooperates with the assembly hole on the pressure ring, so that the center hole on the balance plate does not need to be processed by fine turning, but can be realized by casting a blank, which reduces costs. At the same time, it solves the problem of aluminum cutting edges at the chamfer when the pressure ring and the motor shaft are inserted into the shaft during the interference fit assembly process, thereby improving cleanliness.
[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.
Claims
1. A balance board, characterized in that: The balancing plate (3) is an annular plate body, and a plurality of oil baffles (9) are provided on one end surface of the balancing plate (3) extending outward, and the plurality of oil baffles (9) are arranged along the same circumferential line; an angle γ is formed between a line connecting the bottom outer end of the oil baffle (9) and the axis of the motor shaft (1) and the oil baffle (9), and the angle γ is 20-70°; and an oil port (10) is formed between adjacent oil baffles (9).
2. A balance board according to claim 1, characterized in that: The plurality of oil baffle plates (9) are integrally formed with the balance plate (3).
3. A balance board according to claim 2, characterized in that: The cross section of the oil baffle (9) is in the shape of an equilateral trapezoid, and the width of the oil baffle (9) gradually decreases from the lower end to the upper end.
4. A balance board according to claim 3, characterized in that: The outer end of the oil baffle plate (9) is constructed as an oil guiding arc surface (11).
5. The balance board according to claim 1, characterized in that: There is an arc surface transition between the bottom of the oil baffle (9) and the balance plate (3).
6. A balance board according to claim 5, characterized in that: The oil baffle plates (9) are arranged in 15 pieces.
7. A rotor, comprising a motor shaft (1) and a rotor core (2) sleeved on the motor shaft (1), characterized in that: It also comprises a balancing plate as claimed in any one of claims 1 to 6, wherein the balancing plate (3) is sleeved on the motor shaft (1) and is attached to both sides of the rotor core (2).
8. A rotor according to claim 7, characterized in that: The motor shaft (1) is sleeved with a pressing ring (12), which is interference-connected with the motor shaft (1) and is located between the outer end surface of the balancing plate (3) and the oil outlet hole (8); a gap (13) is formed between the center hole (14) of the balancing plate and the motor shaft (1), and a plurality of protruding columns (15) are axially formed between the center hole (14) of the balancing plate and the plurality of oil baffle plates (9); the pressing ring (12) fits the outer end surface of the balancing plate (3), and a plurality of mounting holes (16) are provided on the pressing ring (12) and are respectively tightly connected to the plurality of protruding columns (15).
9. A motor, comprising a stator, characterized in that: It also includes a rotor as claimed in claim 8, wherein the rotor is arranged on the inner side of the stator, and the stator includes a stator core (4) and a stator coil (5) mounted on the stator core (4), the two ends of the stator coil (5) extend out of the outer end surfaces of the balance plates (3) on both sides, and the axial outer ends of the oil baffle (9) extend out of the axial outer ends of the stator coil (5); the axial ends of the stator core (4) are provided with oil guide rings (6) located at the outer periphery of the two ends of the stator coil (5), and the oil guide rings (6) are provided with oil guide holes that communicate with the oil channels (7) on the stator core (4); and the motor shaft (1) is provided with a plurality of oil outlet holes (8) on the outer side of the balance plate (3).