A coaxial permanent magnet synchronous motor based on new energy vehicles

Abstract

The present invention discloses a coaxial permanent magnet synchronous motor based on new energy vehicles, and relates to the technical field of permanent magnet motors; in order to solve the overheating problem; specifically comprises a housing, and a main shaft A and a main shaft B rotatably connected to both sides of the housing axis, wherein the outer wall of the main shaft A is connected to the rotor A through a key, and the outer wall of the main shaft B is connected to the rotor B through a key, and the inner wall of the housing located at the rotor A is fixed with a stator A matched with the rotor A. The present invention arranges components such as a heat dissipation pipe, a transition ring cavity, and a liquid inlet, and injects cooling lubricating oil therein, and at the same time uses a power coupling and fluid driving mechanism for fluid driving, so that the cooling lubricating oil can circulate, and then heat exchange is achieved through the contact between the heat dissipation pipe and the flowing air, thereby realizing lubrication of the rotating components in the inner cavity of the housing, and also cooling the stator B and the stator A, so as to prevent the stator B and the stator A from being damaged due to overheating.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet motors, and in particular to a coaxial permanent magnet synchronous motor based on new energy vehicles. Background Art

[0002] The "three electrics" of new energy vehicles are the core, which include batteries, motors and electronic controls. The motor is a component that converts electrical energy into mechanical energy. It is controlled by the electronic control, powered by the battery, and directly drives the wheels.

[0003] After searching, the Chinese patent publication number CN117674512A discloses a new energy driven permanent magnet motor, including a motor body, a motor housing is arranged on the outside of the motor body, and a control panel is embedded on the top of the motor housing. It is characterized in that a rotor is sleeved at the center of the inner part of the motor housing, and a planetary gear transmission mechanism is sleeved at one end of the motor housing. The planetary gear transmission mechanism includes an outer shell, a planetary carrier is arranged at the center of the inner part of the outer shell, a central axis extending to the inside of the planetary carrier is arranged in the middle of the rotor, and a traction machine body is sleeved at one end of the outer shell.

[0004] The above patent has the following deficiencies: Since the working conditions of new energy drive motors are different from those of traditional motors, the input power of new energy drive motors is affected by the throttle, and new energy vehicles will frequently accelerate during the operation. During this process, due to the inertia of the vehicle, there will be a certain delay between the vehicle speed and the throttle opening, so the motor coil will have a large current during this delay, which can easily lead to motor overheating and coil damage.

[0005] To this end, the present invention proposes a coaxial permanent magnet synchronous motor based on a new energy vehicle. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a coaxial permanent magnet synchronous motor based on new energy vehicles.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A coaxial permanent magnet synchronous motor based on a new energy vehicle comprises a housing and a main shaft A and a main shaft B rotatably connected to both sides of the housing axis.

[0009] The outer wall of the main shaft A is connected to the rotor A through a key, the outer wall of the main shaft B is connected to the rotor B through a key, the inner wall of the housing located at the rotor A is fixed with a stator A matching with the rotor A, and the inner wall of the housing located at the rotor B is fixed with a stator B matching with the rotor B;

[0010] A plurality of circular array liquid inlets are provided in the middle of the shell, a transition ring cavity is welded on the outer wall of the shell at the liquid inlet, a plurality of heat dissipation pipes are welded on both sides of the transition ring cavity, the other ends of the heat dissipation pipes are respectively welded and connected to the two ends of the shell, and the inner cavity of the shell, the inner cavity of the transition ring cavity and the heat dissipation pipes are filled with cooling lubricating liquid;

[0011] The main shaft A and the main shaft B are matched through a power coupling and fluid drive mechanism.

[0012] Preferably: the power coupling and fluid driving mechanism includes a turbine shell fixed to the outer wall of the main shaft A and an impeller shell fixed to the outer wall of the main shaft B, the end face of the turbine shell is fixed with a circular array of turbine blades, the end face of the impeller shell is fixed with a circular array of impeller blades, the inner wall of the outer ring of the turbine shell is provided with a plurality of through holes 1, and the inner wall of the inner ring of the impeller shell is provided with a plurality of through holes 2.

[0013] Furthermore: the stator B is connected in parallel with the stator A.

[0014] Based on the above solution: the outer wall of the main shaft A is provided with a plurality of twist-increasing blades.

[0015] A better solution among the above solutions is: the inner walls of the main shaft A and the main shaft B are both provided with cavities, the inner walls of the cavities are provided with multiple groups of circular array centrifugal drive components, and the inner walls of the cavities are slidably connected with pistons.

[0016] As a further solution of the present invention: the twist increasing blade is rotatably connected to the main shaft A through a rotating shaft, and a rack is welded on one side wall of the piston located inside the main shaft A, the rack is engaged with the outer wall of the rotating shaft, and the two pistons are rotatably matched with each other through a connecting shaft.

[0017] At the same time, the centrifugal drive assembly includes a cylinder shell fixed to the inner wall of the main shaft A and the main shaft B and a piston 2 slidably connected to the inner wall of the cylinder shell. The piston 2 is connected to the inner wall of the main shaft A and the main shaft B through a spring 1.

[0018] As a preferred embodiment of the present invention: a junction box and heat dissipation ribs are provided on the outer wall of the shell, and the junction box is electrically connected to the stator B and the stator A.

[0019] At the same time, a movable seal is arranged on the opposite side of the main shaft A and the main shaft B.

[0020] As a better solution of the present invention: the movable seal includes a sealing ring fixed to the end face of the main shaft A and a protrusion slidably connected to the end face of the main shaft B through a guide slide rod, the inner wall of the sealing ring is provided with a groove matching the protrusion, and the outer wall of the guide slide rod is buckled with a spring 2, the side wall of the main shaft B is fixed with a flexible ring, and the other end of the flexible ring is fixed to the outer wall of the protrusion.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention provides components such as a heat dissipation pipe, a transition ring cavity, and a liquid inlet, and injects cooling lubricating oil therein, and uses a power coupling and fluid driving mechanism to drive the fluid, so that the cooling lubricating oil can circulate, and then heat exchange is achieved through the contact between the heat dissipation pipe and the flowing air, thereby achieving lubrication of the rotating components in the inner cavity of the shell, and also cooling the stator B and the stator A, thereby preventing the stator B and the stator A from being damaged due to overheating.

[0023] 2. The present invention, by setting a rigid-flexible "split dual-mode" drive of rotor A and stator A, rotor B and stator B, can, on the one hand, drive the cooling lubricating oil while ensuring the wheel drive, thereby saving the setting of a "pump", making the overall integration higher, the volume smaller, and easier to install and arrange; on the other hand, the main shaft A and the main shaft B are connected in the form of "hydraulic coupling", which can play a certain buffering role, thereby reducing the overall current intensity of stator A and stator B at the moment of rapid acceleration and reducing the heat generation; at the same time, by connecting stator B and stator A in parallel, the flow rate of cooling lubricating oil during acceleration can be increased, and the heat dissipation power can be increased.

[0024] 3. The present invention, by arranging the twist-increasing blades, can recycle the axial kinetic energy of the cooling lubricating oil that flows back to the impeller housing at the inner circumference, thereby increasing the torque transmission efficiency between the main shaft B and the main shaft A. On this basis, by setting the "angle of attack" of the twist-increasing blades to be variable, both smoothness and comfort under non-intense driving and acceleration performance under intense driving can be ensured.

[0025] 4. The present invention, by setting a cavity and arranging multiple groups of centrifugal drive components in the cavity, utilizes the speed difference between the main shaft A and the main shaft B under rapid acceleration, converts the speed difference into a pressure difference and applies it to piston 1, thereby utilizing the pressure difference to achieve adaptive control of the "angle of attack" of the torque-increasing blade and increase the response speed.

[0026] 5. The present invention, by providing a movable seal, utilizes the cooperation of the groove and the protrusion to achieve the relative separation of the inner and outer sides of the main shaft A and the main shaft B, thereby preventing the influence of hydraulic pressure on the piston one and increasing the control accuracy. At the same time, the spring two can compensate for the wear of the protrusion and increase reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of a coaxial permanent magnet synchronous motor based on new energy vehicles proposed by the present invention;

[0028] Figure 2This is a cross-sectional structural schematic diagram of a coaxial permanent magnet synchronous motor based on a new energy vehicle proposed by the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of a power coupling and fluid driving mechanism of a coaxial permanent magnet synchronous motor based on a new energy vehicle proposed by the present invention;

[0030] Figure 4 This is a schematic diagram of the twist-increasing blade structure of a coaxial permanent magnet synchronous motor based on a new energy vehicle proposed by the present invention;

[0031] Figure 5 This is a schematic diagram of the cavity structure of a coaxial permanent magnet synchronous motor based on a new energy vehicle proposed by the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of a centrifugal drive assembly of a coaxial permanent magnet synchronous motor based on a new energy vehicle proposed by the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of a movable seal of a coaxial permanent magnet synchronous motor based on a new energy vehicle proposed by the present invention;

[0034] Figure 8 A schematic diagram of a heat dissipation rib structure of a coaxial permanent magnet synchronous motor based on a new energy vehicle proposed by the present invention;

[0035] Fig. 9 A cross-sectional schematic diagram of the cooperation between a sealing ring and a protrusion of a coaxial permanent magnet synchronous motor based on a new energy vehicle proposed by the present invention;

[0036] Fig.10 A schematic diagram of the coordination between the rack and the rotating shaft of a coaxial permanent magnet synchronous motor based on a new energy vehicle proposed by the present invention;

[0037] Fig.11 A circuit diagram of a coaxial permanent magnet synchronous motor based on a new energy vehicle proposed by the present invention;

[0038] Fig.12 A logical schematic diagram of a coaxial permanent magnet synchronous motor based on a new energy vehicle proposed by the present invention;

[0039] Fig.13 This is a schematic diagram of the liquid flow direction of a coaxial permanent magnet synchronous motor based on a new energy vehicle proposed by the present invention.

[0040] In the figure: 1, shell; 2, rotor A; 3, main shaft A; 4, heat dissipation pipe; 5, transition ring cavity; 6, liquid inlet; 7, main shaft B; 8, rotor B; 9, stator B; 10, power coupling and fluid drive mechanism; 11, stator A; 12, turbine blades; 13, through hole 1; 14, turbine shell; 15, pump impeller blades; 16, pump impeller shell; 17, through hole 2; 18, movable seal; 19, torsion increasing blade; 20, connecting shaft; 21, piston 1; 22, cavity; 23, centrifugal drive assembly; 24, rack; 25, rotating shaft; 26, cylinder shell; 27, spring 1; 28, piston 2; 29, sealing ring; 30, groove; 31, protrusion; 32, flexible ring; 33, spring 2; 34, guide slide bar; 35, junction box; 36, heat dissipation rib. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0042] Embodiments of the present invention are described in detail below, examples of which 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] Embodiment 1:

[0044] A coaxial permanent magnet synchronous motor based on new energy vehicles, such as Figure 1-Figure 8 As shown, it includes a shell 1 and a main shaft A3 and a main shaft B7 rotatably connected to both sides of the axis of the shell 1, the outer wall of the main shaft A3 is connected to the rotor A2 through a key, the outer wall of the main shaft B7 is connected to the rotor B8 through a key, the inner wall of the shell 1 located at the rotor A2 is fixed with a stator A11 that cooperates with the rotor A2, and the inner wall of the shell 1 located at the rotor B8 is fixed with a stator B9 that cooperates with the rotor B8.

[0045] A plurality of circular array liquid inlets 6 are provided in the middle of the shell 1, a transition ring cavity 5 is welded to the outer wall of the shell 1 at the liquid inlet 6, a plurality of heat dissipation tubes 4 are welded to both sides of the transition ring cavity 5, the other ends of the heat dissipation tubes 4 are respectively welded and connected to the two ends of the shell 1, and the inner cavity of the shell 1, the inner cavity of the transition ring cavity 5 and the heat dissipation tubes 4 are filled with cooling lubricating liquid.

[0046] The main shaft A3 and the main shaft B7 are coupled with each other through a power coupling and fluid driving mechanism 10 .

[0047] When the device is in use, voltage can be applied to stator B9 and stator A11, so that rotor A2 and rotor B8 can be rotated by utilizing the principle of electromagnetic induction and Lenz principle. Rotation of rotor A2 can directly drive main shaft A3 to rotate, thereby outputting rotational torque to the wheel. On the other hand, rotation of rotor B8 can drive main shaft B7 to rotate, thereby applying rotational torque to main shaft A3 through power coupling and fluid driving mechanism 10 to achieve comprehensive drive. In the process of transmission, power coupling and fluid driving mechanism 10 will drive the cooling lubricant in the middle of shell 1 to both sides, so that the cooling lubricant flows along the air gap between rotor A2 and stator A11 and the air gap between rotor B8 and stator B9, and then flows into transition ring cavity 5 through heat dissipation pipe 4 for confluence, and then flows into the middle inner cavity of shell 1 through liquid inlet 6 to achieve circulation. When flowing through heat dissipation pipe 4, heat exchange can be achieved through contact between heat dissipation pipe 4 and flowing air.

[0048] The device is provided with components such as a heat dissipation pipe 4, a transition ring cavity 5, and a liquid inlet 6, and cooling lubricating oil is injected into the components. At the same time, a power coupling and fluid driving mechanism 10 is used for fluid driving, so that the cooling lubricating oil can circulate, and heat exchange is achieved through the contact between the heat dissipation pipe 4 and the flowing air. Thus, on the one hand, lubrication of the rotating parts in the inner cavity of the shell 1 is achieved, and at the same time, the stator B9 and the stator A11 can be cooled, so as to prevent damage caused by overheating of the stator B9 and the stator A11.

[0049] In order to further solve the overheating and volume optimization problems; Figure 3 As shown, the power coupling and fluid driving mechanism 10 includes a turbine shell 14 fixed to the outer wall of the main shaft A3 and an impeller shell 16 fixed to the outer wall of the main shaft B7, the end face of the turbine shell 14 is fixed with a circular array of turbine blades 12, the end face of the impeller shell 16 is fixed with a circular array of impeller blades 15, the inner wall of the outer ring of the turbine shell 14 is provided with a plurality of through holes 13, and the inner wall of the inner ring of the impeller shell 16 is provided with a plurality of through holes 2 17.

[0050] Since the main shaft A3 is rigidly connected to the wheel, when the same voltage is applied to the stator B9 and the stator A11, the main shaft A3 receives greater resistance, so the rotation speed of the main shaft A3 is lower than that of the main shaft B7. At this time, when the main shaft B7 rotates at a high speed, it will drive the pump wheel shell 16 to rotate, thereby driving the pump wheel blades 15 to rotate, and the cooling lubricating oil at the pump wheel blades 15 is centrifugally thrown out in the direction of the outer circumference. When it reaches the inner wall of the housing 1, the centrifugally thrown cooling lubricating oil flows to the turbine blades 12 and is connected to the turbine blades. After the collision, the blade 12 applies a driving force to the turbine blade 12. At the same time, when the cooling lubricating oil flows to the root of the turbine blade 12, part of the cooling lubricating oil will flow through the through hole 13 due to the axial distribution movement, and the remaining cooling lubricating oil will flow toward the inner circumference of the turbine blade 12, and then flow toward the impeller shell 16 again with the inner circumference, until it flows to the impeller shell 16 again, at this time, part of the cooling lubricating oil will flow through the through hole 2 17 due to the axial distribution movement, and the remaining cooling lubricating oil will be thrown out again by the impeller blade 15.

[0051] The stator B9 is connected in parallel with the stator A11.

[0052] This device, by setting up the rigid-flexible "split dual-mode" drive of the rotor A2 and the stator A11, the rotor B8 and the stator B9, can, on the one hand, drive the cooling lubricating oil while ensuring the wheel drive, thereby saving the setting of the "pump", making the overall integration higher, the volume smaller, and easier to install and arrange; on the other hand, the main shaft A3 and the main shaft B7 are connected in the form of "hydraulic coupling", which can play a certain buffering role, thereby reducing the overall current intensity of the stator A11 and the stator B9 at the moment of rapid acceleration and reducing the heat generation; at the same time, by utilizing the parallel connection of the stator B9 and the stator A11, the flow rate of the cooling lubricating oil can be increased during the acceleration process, and the heat dissipation power can be increased.

[0053] The details are as follows:

[0054] When the accelerator pedal amplitude increases and the input voltages of stator B9 and stator A11 increase at the same time, due to the inertia of the vehicle, the rigid resistance of spindle A3 is large, and its speed increases slowly. The current in stator A11 increases, and the heat generation increases. However, due to the soft connection between spindle A3 and spindle B7, the resistance received by spindle B7 is relatively small. At this time, when the voltage of stator A11 increases, spindle B7 can quickly increase the speed, thereby increasing the flow kinetic energy of the cooling lubricating oil. When the kinetic energy increases, on the one hand, the torque applied to the turbine blades 12 increases, thereby sharing the load for spindle A3 and suppressing the heat generation power of stator A11. On the other hand, the circulation speed of the cooling lubricating oil increases, the heat dissipation efficiency increases, and the temperature rise of stator A11 is suppressed.

[0055] In order to solve the problem of torque transmission efficiency; Figure 4 As shown, the outer wall of the main shaft A3 is provided with a plurality of twist-increasing blades 19 .

[0056] In order to solve the problem of adaptive regulation; Figure 5 As shown, the inner walls of the spindle A3 and the spindle B7 are both provided with a cavity 22, the inner walls of the cavity 22 are provided with multiple groups of circular array centrifugal drive components 23, and the inner walls of the cavity 22 are all slidably connected with a piston 1 21.

[0057] The twist increasing blade 19 is rotatably connected to the main shaft A3 via a rotating shaft 25, and a rack 24 is welded to the side wall of the piston 1 21 located inside the main shaft A3, the rack 24 is engaged with the outer wall of the rotating shaft 25, and the two pistons 1 21 are rotatably matched with each other via a connecting shaft 20.

[0058] The centrifugal drive assembly 23 includes a cylinder shell 26 fixed to the inner walls of the main shaft A3 and the main shaft B7 and a piston 28 slidably connected to the inner wall of the cylinder shell 26. The piston 28 is connected to the inner walls of the main shaft A3 and the main shaft B7 through a spring 1 27.

[0059] The outer wall of the housing 1 is provided with a junction box 35 and heat dissipation ribs 36, and the junction box 35 is electrically connected to the stator B9 and the stator A11.

[0060] During rapid acceleration, the greater the degree of accelerator pedaling, the greater the speed difference between spindle A3 and spindle B7. At this time, due to the transmission loss between spindle A3 and spindle B7, there will be a certain kinetic energy loss. The lost kinetic energy is used for heat dissipation, and this kinetic energy loss will cause a loss of acceleration performance.

[0061] However, compared with normal non-intense driving, it needs to be relatively smooth to increase the comfort of the vehicle. Based on this:

[0062] When the main shaft A3 and the main shaft B7 rotate, they will drive the cylinder shell 26 to rotate, so that the second piston 28 has a tendency to move outward due to the centrifugal force, so that the inner cavity pressure of the chamber 22 will decrease, so that the two pistons are subjected to opposite "suction" forces;

[0063] During non-intense driving, the degree of pedaling of the accelerator is relatively small, and the speed difference between the main shaft A3 and the main shaft B7 is relatively small, so the difference in the "suction" force on the two pistons 21 is relatively small, so that the piston 21 is relatively close to the main shaft A3, thereby driving the torsion increasing blade 19 to rotate through the cooperation of the rack 24 and the rotating shaft 25, so that the "angle of attack" of the torsion increasing blade 19 is reduced, and its kinetic energy recovery rate is reduced. At this time, the long-term heat dissipation power can be guaranteed, thereby ensuring the reliable and stable operation of the motor, and it can also play a certain buffer through the kinetic energy loss, thereby increasing the smoothness and comfort of the vehicle;

[0064] When driving vigorously, the speed difference between the main shaft A3 and the main shaft B7 increases, and the "suction" force difference between the two pistons 21 increases, so that the piston 21 moves toward the main shaft B7, the "angle of attack" of the torsion-increasing blade 19 increases, and the kinetic energy recovery rate increases, thereby ensuring the torque output and the acceleration performance of the vehicle.

[0065] This device, by setting the twist-increasing blades 19, can recycle the axial kinetic energy of the cooling lubricating oil that flows back to the impeller housing 16 at the inner circumference, thereby increasing the torque transmission efficiency between the main shaft B7 and the main shaft A3. On this basis, by setting the "angle of attack" of the twist-increasing blades 19 to be variable, both smoothness and comfort under non-intense driving and acceleration performance under intense driving can be guaranteed.

[0066] In addition, the device, by setting up a cavity 22 and setting up multiple groups of centrifugal drive components 23 in the cavity 22, utilizes the speed difference between the main shaft A3 and the main shaft B7 under rapid acceleration, converts the speed difference into a pressure difference and applies it to the piston 21, thereby utilizing the pressure difference to achieve adaptive control of the "angle of attack" of the torque-increasing blade 19 and increase the response speed.

[0067] When this embodiment is in use, voltage can be applied to stator B9 and stator A11, so that rotor A2 and rotor B8 can rotate by utilizing the principle of electromagnetic induction and Lenz principle. Rotation of rotor A2 can directly drive main shaft A3 to rotate, thereby outputting rotation torque to the wheel. On the other hand, rotation of rotor B8 can drive main shaft B7 to rotate, thereby applying rotation torque to main shaft A3 through power coupling and fluid driving mechanism 10 to achieve comprehensive drive. In the process of transmission, power coupling and fluid driving mechanism 10 will drive the cooling lubricant in the middle of shell 1 to both sides, so that the cooling lubricant flows along the air gap between rotor A2 and stator A11 and the air gap between rotor B8 and stator B9, and then flows into transition ring cavity 5 through heat dissipation pipe 4 and then flows into the middle inner cavity of shell 1 through liquid inlet 6 to achieve circulation. When flowing through heat dissipation pipe 4, heat exchange can be achieved through contact between heat dissipation pipe 4 and flowing air. When the pedal amplitude of the accelerator increases, stator B9 When the input voltage of stator A11 increases at the same time, due to the inertia of the vehicle, the rigid resistance of spindle A3 is relatively large, and its speed increases slowly. The current in stator A11 increases, and the heat generation increases. However, due to the soft connection between spindle A3 and spindle B7, the resistance received by spindle B7 is relatively small. At this time, when the voltage of stator A11 increases, spindle B7 can quickly increase the speed, thereby increasing the flow kinetic energy of the cooling lubricant. When the kinetic energy increases, on the one hand, the torque applied to the turbine blades 12 increases, thereby sharing the load for spindle A3 and suppressing the heat generation power of stator A11. On the other hand, the circulation speed of the cooling lubricant increases, the heat dissipation efficiency increases, and the temperature rise of stator A11 is suppressed. When spindle A3 and spindle B7 rotate, they will drive the cylinder shell 26 to rotate, so that piston 28 has a tendency to move outward due to centrifugal force, so that the inner cavity pressure of the chamber 22 will decrease, so that the two pistons are subjected to opposite "suction" forces;

[0068] During non-intense driving, the degree of pedaling of the accelerator is relatively small, and the speed difference between the main shaft A3 and the main shaft B7 is relatively small, so the difference in the "suction" force on the two pistons 21 is relatively small, so that the piston 21 is relatively close to the main shaft A3, thereby driving the torsion increasing blade 19 to rotate through the cooperation of the rack 24 and the rotating shaft 25, so that the "angle of attack" of the torsion increasing blade 19 is reduced, and its kinetic energy recovery rate is reduced. At this time, the long-term heat dissipation power can be guaranteed, thereby ensuring the reliable and stable operation of the motor, and it can also play a certain buffer through the kinetic energy loss, thereby increasing the smoothness and comfort of the vehicle;

[0069] When driving vigorously, the speed difference between the main shaft A3 and the main shaft B7 increases, and the "suction" force difference between the two pistons 21 increases, so that the piston 21 moves toward the main shaft B7, the "angle of attack" of the torsion-increasing blade 19 increases, and the kinetic energy recovery rate increases, thereby ensuring the torque output and the acceleration performance of the vehicle.

[0070] Embodiment 2:

[0071] A coaxial permanent magnet synchronous motor based on new energy vehicles, such as Figure 7 As shown, in order to solve the pressure influence problem, this embodiment makes the following improvements on the basis of embodiment 1: a movable seal 18 is provided on the opposite side of the main shaft A3 and the main shaft B7.

[0072] The movable seal 18 includes a sealing ring 29 fixed to the end face of the main shaft A3 and a protrusion 31 slidably connected to the end face of the main shaft B7 through a guide slide rod 34. The inner wall of the sealing ring 29 is provided with a groove 30 matching the protrusion 31, and the outer wall of the guide slide rod 34 is buckled with a spring 2 33. A flexible ring 32 is fixed to the side wall of the main shaft B7, and the other end of the flexible ring 32 is fixed to the outer wall of the protrusion 31.

[0073] Since the "angle of attack" of the twist-increasing blade 19 is controlled by a "piston type" and the main shaft A3 and the main shaft B7 are driven by hydraulic force, the hydraulic force will affect the force on the piston 21. Based on this:

[0074] By setting a movable seal 18, the device can achieve relative separation of the inner and outer sides of the main shaft A3 and the main shaft B7 by using the cooperation of the groove 30 and the protrusion 31, thereby preventing the hydraulic pressure from affecting the piston 21 and increasing the control accuracy. At the same time, the spring 2 33 can compensate for the wear of the protrusion 31 and increase reliability.

[0075] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A coaxial permanent magnet synchronous motor based on a new energy vehicle, comprising a housing (1) and a main shaft A (3) and a main shaft B (7) rotatably connected to both sides of the housing (1) axis, characterized in that: The outer wall of the main shaft A (3) is connected to the rotor A (2) via a key, the outer wall of the main shaft B (7) is connected to the rotor B (8) via a key, the inner wall of the housing (1) located at the rotor A (2) is fixed with a stator A (11) that matches the rotor A (2), and the inner wall of the housing (1) located at the rotor B (8) is fixed with a stator B (9) that matches the rotor B (8); A plurality of circular array liquid inlets (6) are provided in the middle of the shell (1); a transition ring cavity (5) is welded to the outer wall of the shell (1) at the liquid inlet (6); a plurality of heat dissipation pipes (4) are welded to both sides of the transition ring cavity (5); the other ends of the heat dissipation pipes (4) are respectively welded and connected to the two ends of the shell (1); and the inner cavity of the shell (1), the inner cavity of the transition ring cavity (5) and the heat dissipation pipes (4) are filled with cooling lubricating liquid; The main shaft A (3) and the main shaft B (7) are driven and matched via a power coupling and fluid driving mechanism (10); The power coupling and fluid driving mechanism (10) comprises a turbine shell (14) fixed to the outer wall of the main shaft A (3) and a pump impeller shell (16) fixed to the outer wall of the main shaft B (7); a circular array of turbine blades (12) is fixed to the end surface of the turbine shell (14); a circular array of pump impeller blades (15) is fixed to the end surface of the pump impeller shell (16); a plurality of through holes (13) are opened on the inner wall of the outer ring of the turbine shell (14); a plurality of through holes (17) are opened on the inner wall of the inner ring of the pump impeller shell (16).

2. A coaxial permanent magnet synchronous motor based on a new energy vehicle according to claim 1, characterized in that: The stator B (9) is connected in parallel with the stator A (11).

3. A coaxial permanent magnet synchronous motor based on a new energy vehicle according to claim 1, characterized in that: The outer wall of the main shaft A (3) is provided with a plurality of twist-increasing blades (19).

4. A coaxial permanent magnet synchronous motor based on a new energy vehicle according to claim 3, characterized in that: The inner walls of the main shaft A (3) and the main shaft B (7) are both provided with a cavity (22), the inner walls of the cavity (22) are provided with a plurality of groups of circular array centrifugal drive components (23), and the inner walls of the cavity (22) are both slidably connected with a piston 1 (21).

5. A coaxial permanent magnet synchronous motor based on new energy vehicles according to claim 4, characterized in that: The twist increasing blade (19) is rotatably connected to the main shaft A (3) via a rotating shaft (25), and a rack (24) is welded to the side wall of the piston one (21) located inside the main shaft A (3), the rack (24) is meshed with the outer wall of the rotating shaft (25), and the two pistons one (21) are rotatably matched with each other via a connecting shaft (20).

6. A coaxial permanent magnet synchronous motor based on new energy vehicles according to claim 4, characterized in that: The centrifugal drive assembly (23) comprises a cylinder housing (26) fixed to the inner walls of the main shaft A (3) and the main shaft B (7) and a second piston (28) slidably connected to the inner wall of the cylinder housing (26); the second piston (28) is connected to the inner walls of the main shaft A (3) and the main shaft B (7) via a first spring (27).

7. A coaxial permanent magnet synchronous motor based on a new energy vehicle according to claim 1, characterized in that: The outer wall of the housing (1) is provided with a junction box (35) and heat dissipation ribs (36), and the junction box (35) is electrically connected to the stator B (9) and the stator A (11).

8. The coaxial permanent magnet synchronous motor based on new energy vehicles according to claim 1, characterized in that: A movable seal (18) is provided on the opposite side of the main shaft A (3) and the main shaft B (7).

9. A coaxial permanent magnet synchronous motor based on a new energy vehicle according to claim 8, characterized in that: The movable seal (18) comprises a sealing ring (29) fixed to the end face of the main shaft A (3) and a protrusion (31) slidably connected to the end face of the main shaft B (7) through a guide slide rod (34); the inner wall of the sealing ring (29) is provided with a groove (30) matching the protrusion (31), and the outer wall of the guide slide rod (34) is buckled with a spring 2 (33); the side wall of the main shaft B (7) is fixed with a flexible ring (32), and the other end of the flexible ring (32) is fixed to the outer wall of the protrusion (31).

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