New energy permanent magnet synchronous motor
By installing a flexible sleeve on the rotor and setting guide bars, through holes and oil drainage channels, the problem of viscous resistance caused by cooling oil penetration is solved, achieving efficient cooling oil discharge and improving motor efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-24
- Publication Date
- 2026-04-07
AI Technical Summary
In existing high-efficiency motors, the penetration of cooling oil between the stator and rotor leads to increased viscous resistance and frictional loss, affecting mechanical efficiency and energy consumption.
A flexible sleeve is installed around the rotor, and V-shaped guide bars and through holes are set on its outer periphery. Combined with oil inlet and oil outlet channels, the cooling oil is discharged by inertia and centrifugal force, reducing oil film thickness and friction loss.
By optimizing the flow path of the cooling oil, the viscous resistance during rotor rotation is reduced, thereby improving motor efficiency and oil discharge efficiency and reducing frictional losses.
Smart Images
Figure CN121813740A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of motor equipment, in particular to a new energy permanent magnet synchronous motor. BACKGROUND
[0002] As the core equipment of industrial energy saving and green development, the operation efficiency of high-efficiency motor directly relates to the energy utilization effect. In order to improve the heat dissipation efficiency, the high-efficiency motor often uses cooling oil to dissipate heat for the stator, and the specific way is to set the cooling oil path on the outer periphery of the stator. However, the stator is usually stacked by multiple silicon steel sheets, and the structural characteristics of the stator cause the cooling oil to easily penetrate into the small gap between the stator and the rotor when flowing, forming an oil film.
[0003] When the rotor rotates, a large viscous resistance will be generated due to the oil film, and the rotating friction will be increased. This friction loss not only reduces the mechanical efficiency of the motor, but also increases the energy consumption and heat generation, forming a vicious cycle. Especially when the motor operates at high speed, the loss caused by the oil film is more significant, which seriously restricts the full play of the performance of the high-efficiency motor. SUMMARY
[0004] The purpose of the present application is to reduce the friction loss of the rotor and improve the efficiency of the motor.
[0005] In particular, the present application provides a new energy permanent magnet synchronous motor, comprising: a shell, which is cylindrical and is arranged horizontally along its axis, and end covers are arranged at both ends thereof, and an oil inlet pipe and an oil outlet pipe are arranged on the upper and lower sides thereof, respectively; a stator arranged in the shell, and an annular cooling oil path is formed between the stator and the shell, and the cooling oil path is communicated with the oil inlet pipe and the oil outlet pipe; a rotor arranged in the stator, and an output shaft is arranged at the rotating center of the rotor, and one end of the output shaft extends out of the end cover; a flexible sleeve sleeved on the rotor and capable of rotating synchronously with the rotor; a plurality of V-shaped guide bars are arranged on the outer side wall of the flexible sleeve in a circumferential direction, and the tips of the guide bars are directed to the rotating direction of the rotor.
[0006] Further, a plurality of through holes are arranged on the flexible sleeve, and a plurality of oil inlet holes are arranged on the outer side wall of the rotor, the oil inlet holes are communicated with an oil discharge channel arranged in the rotor, the oil discharge channel penetrates in the axial direction of the rotor, and the oil discharge channel gradually approaches the axis of the rotor from both ends.
[0007] Further, the output shaft is sleeved with a rotatable mounting ring at each end, and a plurality of blocking rods that are movable along the radial direction of the mounting ring are arranged on each mounting ring; a cross bar is connected between every two blocking rods opposite to each other with respect to the rotor, and the cross bar is located at the outer periphery of the flexible sleeve; the cross bar is configured to drive the blocking rod to switch from a first position close to the mounting ring to a second position away from the mounting ring when the cross bar is subjected to a radial outward thrust greater than an initial radial inward constraint force; when the blocking rod is in the first position, the cross bar is close to the rotor and presses against the flexible sleeve to rotate synchronously with the rotor; when the blocking rod is in the second position, the cross bar is away from the rotor and drives the flexible sleeve to be fixed with respect to the stator; the flexible sleeve comprises a plurality of first sections and a plurality of second sections arranged in a staggered manner in the circumferential direction, wherein the flexibility of the first sections is higher than that of the second sections; the plurality of cross bars correspond to the plurality of first sections one by one, and each cross bar is located on the side of the corresponding first section away from the rotation direction of the rotor; when the cross bar presses against the flexible sleeve close to the rotor, the first section protrudes outward in the radial direction of the rotor.
[0008] Further, three blocking rods are arranged on the mounting ring, and the three blocking rods are uniformly distributed along the circumferential direction of the mounting ring.
[0009] Further, a spring is arranged at the position opposite to each first section and the cross bar, and the spring and the cross bar are connected.
[0010] Further, a plurality of blocking pieces are arranged on the inner side of the flexible sleeve, the plurality of blocking pieces are close to the flexible sleeve and correspond to the plurality of through holes one by one; a blocking strip is connected to the side of the blocking piece away from the rotation direction, and the blocking strip is fixedly connected to the flexible sleeve.
[0011] Further, an installation hole is arranged at the end of the blocking rod facing the mounting ring, a first compression spring and a billiard ball are arranged in the installation hole; the end of the billiard ball is tapered, and the billiard ball partially protrudes out of the blocking rod under the thrust of the first compression spring and abuts against the mounting ring; a counterbore is arranged on the mounting ring for the movement of the blocking rod, a first limiting hole and a second limiting hole adapted to the tapered end of the billiard ball are arranged on the hole wall of the counterbore, the first limiting hole and the second limiting hole are arranged in the axial direction of the counterbore and are spaced apart, and the first limiting hole is closer to the hole bottom of the counterbore; a blocking ring is arranged on the blocking rod, a second compression spring is sleeved on the blocking rod, and an annular protrusion protruding inward in the radial direction is arranged at the hole opening of the counterbore; the second compression spring is located in the counterbore, one end of the second compression spring abuts against the blocking ring, and the other end of the second compression spring abuts against the annular protrusion.
[0012] Further, a limiting assembly is arranged on the housing for abutting against the blocking rod after the blocking rod moves to the second position.
[0013] Further, the limiting assembly comprises a fixed plate fixedly arranged on the shell, a third compression spring having one end arranged on a side wall of the fixed plate away from the rotation direction of the rotor and the other end connected to a limiting plate, a limiting block arranged on the limiting plate for abutting against the stop lever, and a limiting ring arranged on the fixed plate and sleeved on the limiting block and abutting against the limiting plate.
[0014] Further, the flexible sleeve is provided with elastic edges at two ends thereof, and the edges are close to the axis of the rotor in the radial direction.
[0015] The present application has the following beneficial effects: The new energy permanent magnet synchronous motor of the present application is provided with a flexible sleeve sleeved on the rotor and rotating synchronously with the rotor, and V-shaped guide bars are arranged on the outer periphery of the flexible sleeve, so that the cooling oil permeating to the outer periphery of the flexible sleeve is moved to both ends along the guide bars under the action of inertia when the flexible sleeve rotates synchronously with the rotor. The reduction of the amount of cooling oil between the flexible sleeve and the stator can reduce the thickness of the oil film, thereby reducing the viscous resistance when the rotor rotates, and further reducing the friction loss and improving the motor efficiency.
[0016] Further, the new energy permanent magnet synchronous motor of the present application is provided with a through hole arranged on the flexible sleeve, an oil inlet hole arranged on the rotor, and an oil discharge channel communicated with the oil inlet hole, so that when the amount of cooling oil between the flexible sleeve and the stator is large, the cooling oil can enter the oil discharge channel after partially passing through the through hole and the oil inlet hole. The oil discharge channel penetrates the rotor in the axial direction and gradually approaches the axis of the rotor from both ends, so that the cooling oil entering the oil discharge channel can be discharged from both ends along the oil discharge channel under the action of centrifugal force generated when the rotor rotates, thereby improving the oil discharge efficiency, further reducing the friction loss, and improving the motor efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0017] Hereinafter, some specific embodiments of the present application will be described in detail with reference to the accompanying drawings in an exemplary and non-limiting manner. The same reference signs in the drawings indicate the same or similar components or parts. In the drawings: Figure 1 is a structural schematic diagram of a new energy permanent magnet synchronous motor according to an embodiment of the present application; Figure 2 is a structural schematic diagram of another angle of a new energy permanent magnet synchronous motor according to an embodiment of the present application; Figure 3 is a structural schematic diagram of another angle of a new energy permanent magnet synchronous motor according to an embodiment of the present application; Figure 4 is a schematic sectional view taken along the section line A-A in Figure 2 ; Figure 5 is a schematic enlarged view of the region D in Figure 4 ; Figure 6 It is along Figure 3 A schematic cross-sectional view taken by the cutting line BB in the diagram; Figure 7 yes Figure 6 A schematic enlarged view of region E in the middle; Figure 8 It is along Figure 3 A schematic cross-sectional view cut off by the section line CC; Figure 9 yes Figure 8 A schematic enlarged view of the central region F; Figure 10 yes Figure 6 A schematic cross-sectional view of the flexible sleeve when it has bulged but has not moved far away from the rotor; Figure 11 yes Figure 10 A schematic enlarged view of region G in the middle; Figure 12 yes Figure 6 A schematic cross-sectional view of the flexible sleeve as it moves away from the rotor; Figure 13 yes Figure 12 A schematic enlarged view of region H in the middle; Figure 14 yes Figure 8 A schematic cross-sectional view of the flexible sleeve as it moves away from the rotor; Figure 15 yes Figure 14 A schematic enlarged view of region I in the middle; Figure 16 This is an exploded view of a new energy permanent magnet synchronous motor according to an embodiment of the present invention; Figure 17 yes Figure 16 A schematic enlarged view of region J in the middle; Figure 18 This is a schematic diagram of the structure of a flexible sleeve according to an embodiment of the present invention; Figure 19 This is a schematic diagram of the flexible sleeve from another angle according to an embodiment of the present invention; Figure 20 This is a schematic diagram of the rotor structure according to an embodiment of the present invention; Figure 21 This is an exploded view of a stop lever according to an embodiment of the present invention; Figure 22 This is a schematic cross-sectional view of a mounting ring according to an embodiment of the present invention.
[0018] in: 100. Outer casing; 110. End cap; 120. Oil inlet pipe; 130. Oil outlet pipe; 140. Annular groove; 150. Oil inlet groove; 160. Oil outlet groove; 170. Limiting assembly; 171. Fixing plate; 172. Third compression spring; 173. Limiting plate; 174. Limiting block; 175. Limiting ring; 200. Stator; 210. Cooling oil passage; 300. Rotor; 310. Output shaft; 311. Bearing; 320. Oil inlet hole; 321. Annular groove; 322. Oil drain channel; 33. 0. Mounting ring; 331. Countersunk hole; 332. First limiting hole; 333. Second limiting hole; 334. Annular protrusion; 340. Stop bar; 341. Mounting hole; 342. First compression spring; 343. Ball; 344. Retaining ring; 345. Second compression spring; 350. Crossbar; 360. Permanent magnet; 400. Flexible sleeve; 410. Guide bar; 420. Through hole; 430. Spring piece; 440. Baffle; 450. Stop bar; 460. Edge; L1. First section; L2. Second section. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
[0020] The terms "first" and "second" used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically stated, this indicates that other features are not excluded and may be further included.
[0021] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0022] The following reference Figures 1 to 22 This invention describes a new energy permanent magnet synchronous motor.
[0023] The scheme of the embodiment provides a new energy permanent magnet synchronous motor. The new energy permanent magnet synchronous motor can generally comprise a shell 100, a stator 200, a rotor 300, and a flexible sleeve 400.
[0024] The shell 100 is in a cylindrical shape and is arranged horizontally along its axis. Two end covers 110 are arranged at two ends of the shell 100. An oil inlet pipe 120 and an oil outlet pipe 130 are arranged on the upper and lower sides of the shell 100, respectively. The stator 200 is arranged in the shell 100. An annular cooling oil passage 210 is formed between the stator 200 and the shell 100. The cooling oil passage 210 is in communication with the oil inlet pipe 120 and the oil outlet pipe 130. The rotor 300 is arranged in the stator 200. An output shaft 310 is arranged at the rotation center of the rotor 300. One end of the output shaft 310 extends out of the end cover 110. The flexible sleeve 400 is sleeved on the rotor 300 and can rotate synchronously with the rotor 300. A plurality of V-shaped guide bars 410 are arranged on the outer side wall of the flexible sleeve 400 in a circumferential direction. The tips of the guide bars 410 are directed to the rotation direction of the rotor 300.
[0025] As shown in Figure 16 , a plurality of annular grooves 140 are formed on the inner wall surface of the shell 100 in an axial direction. An oil inlet groove 150 and an oil outlet groove 160 are arranged on the inner wall surface of the shell 100 in an axial direction and are in communication with the oil inlet pipe 120 and the oil outlet pipe 130, respectively. The inner wall surface of the shell 100 cooperates with the outer wall surface of the stator 200 to form the cooling oil passage 210. The cooling oil flows into the oil inlet groove 150 from the oil inlet pipe 120 above the shell 100, flows to the plurality of annular grooves 140, respectively, and then flows downward along the annular grooves 140. Finally, the cooling oil is collected in the oil outlet groove 160 and is discharged from the oil outlet pipe 130. The annular grooves 140, the oil inlet groove 150, and the oil outlet groove 160 are arranged in an interval. The arrangement not only makes the cooling oil flow more uniformly and comprehensively along the outer periphery of the stator 200, but also makes the flow of the cooling oil more smooth, thereby improving the cooling efficiency.
[0026] As shown in Figure 18 , in the scheme of the embodiment, the rotor 300 rotates clockwise, and the guide bars 410 are arranged in a counterclockwise direction from the middle to the two ends. The flexible sleeve 400 is made of a non-metallic material, such as plastic, which has high bending flexibility and low tensile ductility. Bearings 311 are arranged at the two ends of the output shaft 310. A plurality of permanent magnets 360 are arranged in the rotor 300.
[0027] The scheme of the embodiment is that a flexible sleeve 400 which can rotate synchronously with the rotor 300 is sleeved on the rotor 300, and a V-shaped guide strip 410 is arranged on the outer periphery of the flexible sleeve 400, so that when the flexible sleeve 400 rotates synchronously with the rotor 300, the cooling oil permeating to the outer periphery of the flexible sleeve 400 moves to both ends along the guide strip 410 under the action of inertia and is discharged. The reduction of the amount of cooling oil between the flexible sleeve 400 and the stator 200 can reduce the oil film thickness, thereby reducing the viscous resistance when the rotor 300 rotates, further reducing the friction loss, and improving the motor efficiency.
[0028] In a further embodiment, a plurality of through holes 420 are arranged on the flexible sleeve 400, and a plurality of oil inlet holes 320 are arranged on the outer side wall of the rotor 300, the oil inlet holes 320 opening into an oil discharge channel 322 arranged in the rotor 300, the oil discharge channel 322 penetrating in the axial direction of the rotor 300, and the oil discharge channel 322 gradually approaching the axis of the rotor 300 from both ends.
[0029] The scheme of the embodiment is that a plurality of through holes 420 are arranged on the flexible sleeve 400, and a plurality of oil inlet holes 320 are arranged on the outer side wall of the rotor 300, the oil inlet holes 320 opening into an oil discharge channel 322 arranged in the rotor 300, the oil discharge channel 322 penetrating in the axial direction of the rotor 300, and the oil discharge channel 322 gradually approaching the axis of the rotor 300 from both ends.
[0030] As shown in Figure 18 The plurality of through holes 420 are uniformly distributed on the flexible sleeve 400, and the distance between the through holes 420 between the adjacent two guide strips 410 is different from the distance to the same guide strip 410. When the flexible sleeve 400 rotates, the cooling oil falling to the outer periphery of the flexible sleeve 400 will adhere to the side of the guide strip 410 facing the rotation direction due to the action of inertia. When the oil discharge speed of the guide strip 410 is lower than the penetration speed of the cooling oil, the cooling oil will continuously accumulate on the guide strip 410. The different distance between the through holes 420 and the guide strips 410 is arranged so that the more the amount of cooling oil accumulated between the guide strips 410, the more the number of through holes 420 covered by the cooling oil, that is, the more the amount of cooling oil flowing into the flexible sleeve 400 through the through holes 420, passing through the oil inlet holes 320 and the oil discharge channel 322, thereby improving the oil discharge efficiency and ensuring the oil discharge effect.
[0031] As shown in Figure 20As shown, the outer side wall of the rotor 300 can be provided with an annular groove 321 at a position opposite to the oil inlet hole 320, so as to facilitate the cooling oil to enter the oil inlet hole 320.
[0032] In a further embodiment, the output shaft 310 is sleeved with a rotatable mounting ring 330 at each end, and each mounting ring 330 is provided with a plurality of blocking rods 340 movable in the radial direction of the mounting ring 330. A crossbar 350 is connected between every two opposite blocking rods 340 with respect to the rotor 300, and the crossbar 350 is located at the outer periphery of the flexible sleeve 400. The crossbar 350 is configured to drive the blocking rod 340 to switch from a first position close to the mounting ring 330 to a second position away from the mounting ring 330 when the radial outward thrust force acting on the crossbar 350 is greater than the initial radial inward restraining force; wherein when the blocking rod 340 is in the first position, the crossbar 350 is close to the rotor 300 and presses the flexible sleeve 400 to rotate synchronously with the rotor 300; when the blocking rod 340 is in the second position, the crossbar 350 is away from the rotor 300 and drives the flexible sleeve 400 to be fixed with respect to the stator 200. The flexible sleeve 400 includes a plurality of first sections L1 and a plurality of second sections L2 arranged in a staggered manner in the circumferential direction, wherein the flexibility of the first section L1 is higher than that of the second section L2. The plurality of crossbars 350 correspond one-to-one to the plurality of first sections L1, and each crossbar 350 is located at the side of the corresponding first section L1 away from the rotation direction of the rotor 300. When the crossbar 350 presses the flexible sleeve 400 close to the rotor 300, the first section L1 protrudes outward in the radial direction of the rotor 300.
[0033] When the centrifugal force generated by the cooling oil inside the flexible sleeve 400 is small (i.e., the amount of cooling oil accumulated inside the flexible sleeve 400 is small and / or the rotation speed of the rotor 300 is low), the blocking rod 340 remains in the first position close to the mounting ring 330 when the crossbar 350 presses the flexible sleeve 400 to rotate synchronously with the rotor 300. The crossbar 350 pushes the flexible sleeve 400 close to the rotor 300, and the first section L1 of the flexible sleeve 400 protrudes (as shown in Figure 7 ).
[0034] As the amount of cooling oil accumulated inside the flexible sleeve 400 gradually increases and / or the rotation speed of the rotor 300 increases, the centrifugal force generated by the cooling oil gradually increases, and the radial outward thrust force acting on the crossbar 350 through the flexible sleeve 400 also gradually increases. The second section L2 of the flexible sleeve 400 protrudes under the pressing of the cooling oil. The first section L1, the second section L2, and the outer side wall of the rotor 300 form a cavity with one end larger and one end smaller (as shown in Figure 11 ).
[0035] With the centrifugal force of the cooling oil between the flexible sleeve 400 and the rotor 300 further increasing, after the radial outward thrust on the crossbar 350 is greater than the radial inward initial constraint force on the crossbar 350, the crossbar 350 drives the stopper 340 to move radially outward, so that the stopper 340 moves to the second position away from the mounting ring 330. The cavity between the first section L1, the second section L2 and the outer side wall of the rotor 300 between the two connected crossbars 350 still maintains the special shape of one end being larger than the other end (as shown in Figure 13 ), and the cooling oil outside the flexible sleeve 400 is squeezed into the inside of the flexible sleeve 400. The cooling oil entering the inside of the flexible sleeve 400 is squeezed into the oil inlet hole 320 by the special shape of the flexible sleeve 400 when rotating with the rotor 300, and then is discharged through the oil discharge channel 322.
[0036] After the cooling oil between the flexible sleeve 400 and the rotor 300 is discharged, the centrifugal force of the cooling oil decreases. The crossbar 350 will reset under the action of the initial constraint force, and press the flexible sleeve 400 to tightly adhere to the rotor 300 and rotate synchronously (as shown in Figure 7 ). The flexible sleeve 400 changes from static to motion, so that the cooling oil outside the flexible sleeve 400 is better discharged along the guide strip 410 under the action of inertia.
[0037] The scheme of the embodiment utilizes the centrifugal force generated when the cooling oil between the flexible sleeve 400 and the rotor 300 rotates, so that when the amount of cooling oil between the flexible sleeve 400 and the rotor 300 is large and / or the rotating speed of the rotor 300 is high, the crossbar 350 moves away from the rotor 300 and drives the stopper 340 to move to the second position, so that the stopper 340, the crossbar 350 and the flexible sleeve 400 move away from the rotor 300 while being fixed relative to the stator 200, thereby making the rotor 300 change from the state of driving the flexible sleeve 400 to rotate synchronously to the state of rotating alone. When the amount of cooling oil between the flexible sleeve 400 and the rotor 300 decreases and / or the rotating speed of the rotor 300 decreases, the crossbar 350 moves close to the rotor 300 and drives the stopper 340 to reset to the first position, so that the rotor 300 drives the flexible sleeve 400 to rotate synchronously again.
[0038] The flexible sleeve 400 is provided with a plurality of first sections L1 and second sections L2 arranged alternately, and the flexibility of the first sections L1 is higher than that of the second sections L2, so that the first sections L1 are bent preferentially to the second sections L2, and the amount of bending of the first sections L1 is greater than that of the second sections L2, so that the flexible sleeve 400 forms a special shape in which one end is away from the rotor 300 and the other end is close to the rotor 300 periodically after being away from the rotor 300. The flexible sleeve 400 is fixed relative to the stator 200 after being away from the rotor 300, and the rotation of the rotor 300 drives the cooling oil attached to the surface of the rotor 300 to move from the first sections L1 to the second sections L2, and the cooling oil adsorbed inside the flexible sleeve 400 also moves from the first sections L1 to the second sections L2 under the action of inertia. The cooling oil between the flexible sleeve 400 and the rotor 300 is squeezed and discharged into the oil inlet hole 320, thereby improving the oil discharge efficiency, reducing the friction loss of the rotor 300, and improving the efficiency of the motor.
[0039] In some preferred embodiments, the mounting ring 300 is provided with three stop rods 340, and the three stop rods 340 are uniformly distributed along the circumference of the mounting ring 300, thereby improving the structural stability.
[0040] In further embodiments, the opposite positions of each first section L1 and the cross rod 350 are provided with elastic sheets 430, and the elastic sheets 430 and the cross rod 350 are clamped.
[0041] As shown in Figure 7 the two sides of the elastic sheet 430 are fixedly connected with the flexible sleeve 400, and the inside of the flexible sleeve 400 forms a curved shape protruding radially inward. The elastic sheet 430 is provided with a clamping block, and the cross rod 350 is provided with a corresponding clamping groove.
[0042] The scheme of the present embodiment avoids dislocation of the flexible sleeve 400 and the cross rod 350 by providing the elastic sheet 430 and clamping the elastic sheet 430 and the cross rod 350, so that the cross rod 350 always remains relative to the first section L1 of the flexible sleeve 400 when the flexible sleeve 400 is close to or away from the rotor 300.
[0043] In further embodiments, the inside of the flexible sleeve 400 is provided with a plurality of stop sheets 440, the plurality of stop sheets 440 are attached to the flexible sleeve 400, and the plurality of stop sheets 440 are in one-to-one correspondence with the plurality of through holes 420. The side of the stop sheet 440 away from the rotation direction is connected with a stop strip 450, and the stop strip 450 is fixedly connected with the flexible sleeve 400.
[0044] The scheme of the present embodiment allows the cooling oil to flow from the outside of the flexible sleeve 400 to the inside of the flexible sleeve 400 in one direction only by providing the stop sheet 440 on the inside of the flexible sleeve 400. When the cooling oil between the flexible sleeve 400 and the rotor 300 is squeezed, the cooling oil can be smoothly squeezed into the oil inlet hole 320 and discharged.
[0045] As shown in FIG. 4, the through holes 420 in the same column in the axial direction correspond to the same baffle 440, which can be connected with the same baffle bar 450. Figure 18
[0046] In order to provide an initial constraint force to the cross rod 350, in some embodiments, the baffle rod 340 is provided with a mounting hole 341 at one end thereof towards the mounting ring 330, and a first compression spring 342 and a marble 343 are arranged in the mounting hole 341. The end of the marble 343 is tapered, and the marble 343 partially protrudes from the baffle rod 340 under the pushing of the first compression spring 342 and abuts against the mounting ring 330. The mounting ring 330 is provided with a counterbore 331 for the movement of the baffle rod 340, and the hole wall of the counterbore 331 is provided with a first limiting hole 332 and a second limiting hole 333 adapted to the tapered end of the marble 343, the first limiting hole 332 and the second limiting hole 333 being spaced apart along the axial direction of the counterbore 331, and the first limiting hole 332 being closer to the hole bottom of the counterbore 331. The baffle rod 340 is provided with a baffle ring 344, and a second compression spring 345 is sleeved on the baffle rod 340, and the hole opening of the counterbore 331 is provided with an annular protrusion 334 protruding inwardly in the radial direction.
[0047] As shown in FIG. 4, the marble 343 is located in the first limiting hole 332, and the baffle rod 340 is in the first position. When the marble 343 is located in the second limiting hole 333, the baffle rod 340 is in the second position. The first compression spring 342 and the second compression spring 345 are respectively located on the two sides of the baffle ring 344, and do not interfere with each other in operation. Figure 5
[0048] As the amount of cooling oil between the flexible sleeve 400 and the rotor 300 gradually increases and / or the rotational speed of the rotor 300 continuously increases, the centrifugal force of the cooling oil acting on the flexible sleeve 400 gradually increases. When the force of the flexible sleeve 400 pushing the cross rod 350 is sufficient to resist the elastic force of the first compression spring 342 and the second compression spring 345, the marble 343 compresses the first compression spring 342 and escapes from the first limiting hole 332. Then, the baffle rod 340 moves outwardly along the counterbore 331 until the marble 343 is opposite to the second limiting hole 333. Under the pressing of the first compression spring 342, the marble 343 extends into the second limiting hole 333.
[0049] With the cooling oil between the flexible sleeve 400 and the rotor 300 being gradually discharged and / or the rotating speed of the rotor 300 being gradually reduced, the radial outward thrust of the flexible sleeve 400 on the crossbar 350 is gradually reduced. When the thrust of the flexible sleeve 400 on the crossbar 350 plus the elastic force of the first compression spring 342 is not enough to resist the elastic force of the second compression spring 345, the ball 343 is pressed against the first compression spring 342 and comes out of the second limiting hole 333 under the elastic force of the second compression spring 345, and then the stop lever 340 moves inward along the counterbore 331 until the ball 343 is opposite to the first limiting hole 332. Under the pressing of the first compression spring 342, the ball 343 extends into the first limiting hole 332.
[0050] The scheme of the embodiment utilizes the spring elastic force and the centrifugal force of the cooling oil to enable the stop lever 340 to automatically switch between the first position and the second position according to the change of the viscous drag received by the rotor 300 when rotating, which is not only simple in structure and low in cost, but also stable in operation.
[0051] The housing 100 is provided with a limiting assembly 170 for abutting against the stop lever 340 after the stop lever 340 moves to the second position.
[0052] The scheme of the embodiment sets the limiting assembly 170 on the housing 100 and sets the limiting assembly 170 to abut against the stop lever 340 moving to the second position, so as to hinder the stop lever 340 from continuing to rotate with the rotor 300 under the action of inertia, and further enable the stop lever 340, the crossbar 350 connected with the stop lever 340 and the flexible sleeve 400 clamped with the crossbar 350 to be fixed relative to the stator 200.
[0053] The limiting assembly 170 can generally include a fixed plate 171, a third compression spring 172, a limiting plate 173, a limiting block 174 and a limiting ring 175.
[0054] The fixed plate 171 is fixedly arranged on the housing 100. The third compression spring 172 is arranged on the side wall of the fixed plate 171 away from the rotating direction of the rotor 300, and the other end is connected with the limiting plate 173. The limiting plate 173 is provided with the limiting block 174 for pressing against the stop lever 340. The limiting ring 175 is arranged on the fixed plate 171. The limiting ring 175 is sleeved on the limiting block 174 and abuts against the limiting plate 173.
[0055] The scheme of the embodiment is characterized in that the limiting plate 173 connected with the third compression spring 172 is arranged, and the limiting block 174 abutting against the blocking rod 340 is arranged on the limiting plate 173, so that, after the blocking rod 340 moves to the second position and abuts against the limiting block 174 under the action of inertia, the elastic action of the spring can be used for buffering, which can effectively reduce noise and vibration, reduce the damage risk of the cross rod 350, and improve the service life.
[0056] As shown in Figure 17 The end surface of the limiting block 174 abutting against the blocking rod 340 can be provided with an arc-shaped groove, and the structure of the arc-shaped groove is matched with the rod body of the blocking rod 340, so that the contact area of the blocking rod 340 and the limiting block 174 is increased when they abut against each other, the contact stress is prevented from being too concentrated, and the damage risk is reduced.
[0057] The flexible sleeve 400 is provided with the elastic edge 460 at two ends, and the elastic edge 460 is close to the axis of the rotor 300 in the radial direction from the edge of the flexible sleeve 400.
[0058] The scheme of the embodiment is characterized in that the elastic edge 460 is arranged at two ends of the flexible sleeve 400, which not only makes the position structure of the flexible sleeve 400 relative to the rotor 300 more stable, but also makes the installation and dismounting more convenient.
[0059] The specific working process of the new energy permanent magnet synchronous motor provided by the application is described in combination with the above embodiment. The motor is started, the rotor 300 starts to rotate, and the cooling oil enters the cooling oil path 210 from the oil inlet pipe 120, flows through the outer periphery of the stator 200, and is then discharged from the oil outlet pipe 130.
[0060] In the process that the cooling oil flows through the stator 200, the cooling oil seeps between the stator 200 and the rotor 300, falls on the flexible sleeve 400, and then is discharged to both ends along the guide strip 410 on the flexible sleeve 400 under the action of inertia.
[0061] When the cooling oil accumulated on the outside of the flexible sleeve 400 is relatively much, the cooling oil can partially enter the inside of the flexible sleeve 400 through the through hole 420 and adhere between the flexible sleeve 400 and the rotor 300.
[0062] The cooling oil is accumulated between the rotor 300 and the flexible sleeve 400, part of which is discharged through the oil inlet hole 320 into the oil discharge channel 322, and part of which rotates synchronously with the rotor 300. As the amount of cooling oil increases or the rotation speed of the rotor 300 increases, the centrifugal force of the cooling oil acting on the flexible sleeve 400 gradually increases, until the cross rod 350 is pushed away from the rotor 300, and the blocking rod 340 is switched from the first position to the second position.
[0063] After the stop lever 340 moves to the second position, the cooling oil attached to the inside of the flexible sleeve 400 moves under the action of inertia relative to the stator 200, and the cooling oil attached to the surface of the rotor 300 rotates under the driving of the rotor 300. The cooling oil between the flexible sleeve 400 and the rotor 300 moves from the first section L1 to the second section L2, is extruded into the oil inlet hole 320 under compression, and then enters the oil discharge channel 322, and is discharged to both ends along the oil discharge channel 322 under the action of centrifugal force.
[0064] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as falling within the scope of the present disclosure.
[0065] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.
Claims
1. A new energy permanent magnet synchronous motor, characterized in that, include: The outer casing is cylindrical and horizontally arranged along its axis. It has end caps at both ends and an oil inlet pipe and an oil outlet pipe on its upper and lower sides, respectively. A stator is disposed inside the housing, and an annular cooling oil passage is formed between the stator and the housing. The cooling oil passage is connected to the oil inlet pipe and the oil outlet pipe. The rotor is disposed inside the stator, and an output shaft is provided at its rotation center, with one end of the output shaft extending out of the end cover. A flexible sleeve is fitted onto the rotor and can rotate synchronously with the rotor; multiple V-shaped guide bars are arranged circumferentially on the outer wall of the flexible sleeve, and the tips of the guide bars face the rotation direction of the rotor.
2. The new energy permanent magnet synchronous motor according to claim 1, characterized in that, The flexible sleeve is provided with multiple through holes, and the outer side wall of the rotor is provided with multiple oil inlet holes. The oil inlet holes lead to the oil discharge channel provided inside the rotor. The oil discharge channel passes through the rotor in the axial direction and gradually approaches the axis of the rotor from both ends.
3. The new energy permanent magnet synchronous motor according to claim 2, characterized in that, The output shaft is fitted with a rotatable mounting ring at each end, and each mounting ring is provided with a plurality of stop bars that can move radially along the mounting ring; a crossbar is connected between every two stop bars that are opposite to the rotor, and the crossbar is located on the outer periphery of the flexible sleeve; The crossbar is configured such that when the radially outward pushing force it receives is greater than the radially inward initial constraint force, it drives the stop bar to switch from a first position close to the mounting ring to a second position away from the mounting ring; wherein, when the stop bar is in the first position, the crossbar is close to the rotor and presses against the flexible sleeve to rotate synchronously with the rotor; when the stop bar is in the second position, the crossbar is away from the rotor and drives the flexible sleeve to be fixed relative to the stator; The flexible sleeve includes a plurality of first sections and a plurality of second sections arranged circumferentially, wherein the flexibility of the first sections is higher than that of the second sections; a plurality of crossbars correspond one-to-one with a plurality of first sections, and each crossbar is located on the side of the corresponding first section away from the rotation direction of the rotor; when the crossbar presses against the flexible sleeve and is close to the rotor, the first section protrudes outward along the radial direction of the rotor.
4. The new energy permanent magnet synchronous motor according to claim 3, characterized in that, The mounting ring is provided with three stops, and the three stops are evenly distributed along the circumference of the mounting ring.
5. The new energy permanent magnet synchronous motor according to claim 3, characterized in that, Each of the first sections and the crossbar is provided with a spring clip at the position opposite to the crossbar, and the spring clip and the crossbar are engaged.
6. The new energy permanent magnet synchronous motor according to claim 2, characterized in that, The flexible sleeve has multiple baffles on its inner side, which abut against the flexible sleeve and are aligned with the multiple through holes. A baffle bar is connected to the side of the baffle that is away from the rotation direction, and the baffle bar is fixedly connected to the flexible sleeve.
7. The new energy permanent magnet synchronous motor according to claim 3, characterized in that, The stop bar has a mounting hole at one end facing the mounting ring, and a first compression spring and a ball are disposed in the mounting hole; the end of the ball is tapered, and the ball extends out of the stop bar under the push of the first compression spring and abuts against the mounting ring; The mounting ring is provided with a countersunk hole for the movement of the stop bar. The wall of the countersunk hole is provided with a first limiting hole and a second limiting hole that are adapted to the tapered end of the ball. The first limiting hole and the second limiting hole are spaced apart along the axial direction of the countersunk hole, and the first limiting hole is closer to the bottom of the countersunk hole. A retaining ring is provided on the retaining rod, and a second compression spring is sleeved on the retaining rod. An annular protrusion that protrudes radially inward is provided at the opening of the countersunk hole. The second compression spring is located inside the countersunk hole, with one end abutting against the retaining ring and the other end abutting against the annular protrusion.
8. The new energy permanent magnet synchronous motor according to claim 3, characterized in that, The housing is provided with a limiting component for abutting against the stop bar after the stop bar is moved to the second position.
9. The new energy permanent magnet synchronous motor according to claim 8, characterized in that, The limiting component includes: A fixing plate is fixedly mounted on the outer casing; The third compression spring has one end set on the side wall of the fixed plate opposite to the rotation direction of the rotor, and the other end connected to the limiting plate; the limiting plate is provided with a limiting block for pressing against the stop rod; A limiting ring is disposed on the fixed plate; the limiting ring is sleeved on the limiting block and abuts against the limiting plate.
10. The new energy permanent magnet synchronous motor according to claim 1, characterized in that, The flexible sleeve has elastic edges at both ends, which extend radially toward the axis of the rotor from the edge of the flexible sleeve.