A maintenance-free liquid-cooled permanent magnet speed control system

Abstract

This utility model belongs to the technical field of permanent magnet speed regulators, specifically relating to a maintenance-free liquid-cooled permanent magnet speed regulation system. It includes a motor, a liquid-cooled tank, and a load. A conductor wheel is connected to the motor shaft, and a permanent magnet wheel is connected to the load shaft. The conductor wheel and permanent magnet wheel are coupled within the liquid-cooled tank. The conductor wheel is installed at the end of a motor shaft sleeve, which is fitted onto the motor shaft. The permanent magnet wheel is installed at the end of a load shaft sleeve, which is fitted onto the load shaft. The liquid-cooled tank has end-cap flanges at both ends. The rotating shafts at both ends pass through these end-cap flanges and connect to the conductor wheel or permanent magnet wheel. A frictionless seal is used between the end-cap flanges and the shafts. By directly fixing the conductor wheel and permanent magnet wheel to the motor shaft and load shaft respectively through the motor shaft sleeve and load shaft sleeve, the conductor wheel and permanent magnet wheel are directly supported by the motor shaft and load shaft. This eliminates the need for a bearing support structure and a skeleton oil seal structure. Therefore, a frictionless seal can be directly used between the end-cap flanges and the shafts, simplifying the structure.

Description

Technical Field

[0001] This utility model relates to a maintenance-free liquid-cooled permanent magnet speed regulation system, belonging to the technical field of permanent magnet speed regulators. Background Technology

[0002] A permanent magnet speed controller is a transmission device that transmits torque through an air gap, and is mainly used for torque transmission between an electric motor and a load device.

[0003] Current liquid-cooled permanent magnet speed controllers have a liquid-cooled housing structure where the input and output shafts are supported by bearings, as seen in the liquid-cooled permanent magnet speed controller with authorization announcement number CN105634243B. Therefore, a skeleton oil seal is required to prevent liquid leakage from the housing. If water cooling is used, an oil-water separation system must be added to the bearing seal. Generally, the adjustment of the distance between the conductor wheel and the permanent magnet wheel inside the housing of this type of permanent magnet speed controller uses a worm gear and lead screw-nut transmission, which is structurally cumbersome. If water cooling is used, the adjustment mechanism seal must also employ an oil-water separation system. These structural forms have disadvantages such as complex structure, high maintenance costs, and large space occupation. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a maintenance-free liquid-cooled permanent magnet speed regulation system to solve the above problems.

[0005] The maintenance-free liquid-cooled permanent magnet speed control system of this utility model includes a motor, a liquid-cooled box, and a load. The liquid-cooled box dissipates heat through external circulation. The motor shaft is connected to a conductor wheel, and the load shaft is connected to a permanent magnet wheel. The conductor wheel and the permanent magnet wheel are coupled within the liquid-cooled box. The motor can move along its axial direction to adjust the distance between the conductor wheel and the permanent magnet wheel. The conductor wheel is installed at the end of the motor shaft sleeve, which is fitted onto the motor shaft. The permanent magnet wheel is installed at the end of the load shaft sleeve, which is fitted onto the load shaft. The liquid-cooled box has end cover flanges at both ends. The rotating shafts at both ends pass through the end cover flanges to connect to the conductor wheel or the permanent magnet wheel. A frictionless seal is used between the end cover flanges and the shafts.

[0006] This invention directly fixes the conductor wheel and permanent magnet wheel to the motor shaft and load shaft respectively through the motor shaft sleeve and load shaft sleeve. The motor shaft and load shaft directly support the conductor wheel and permanent magnet wheel, eliminating the need for bearing support structure and skeleton oil seal sealing structure. Therefore, a frictionless seal can be directly used between the end cover flange and the shaft body. By maintaining a small gap (usually 0.05-0.5mm) between the shaft and the end cover flange, isolation is achieved by using an oil film. There is no direct physical contact during operation, which greatly simplifies the structure.

[0007] Preferably, the inner wall of the end cover flange has multiple annular grooves, which can gradually reduce oil penetration and improve sealing performance.

[0008] Outside the liquid cooling box, a liquid collection tank is located below the end cover flange. One end of the return oil pipe is connected to the bottom of the liquid collection tank, and the other end of the return oil pipe is connected back to the liquid cooling box. Even if a small amount of liquid leaks, it can flow back into the liquid cooling box through the liquid collection tank and the return oil pipe.

[0009] The motor is fixed to the slide plate, which, under the action of the actuator, can drive the motor to move along its axial direction. The actuator can be an existing drive structure such as a gear and rack mechanism or a lead screw and nut mechanism.

[0010] Furthermore, the actuator is fixed to the base plate, and a protective cover is provided between the base plate and the slide plate, which is fixed on the slide plate. The protective cover completely covers the gap between the base plate and the slide plate, making it waterproof and dustproof.

[0011] Furthermore, both the base plate and the skateboard are rectangular and of equal size. An extension plate is provided at one end of the top surface of the base plate to accommodate the movement of the skateboard, so that the space between the base plate and the skateboard is always shielded to prevent dust from entering.

[0012] The advantages of this utility model compared with the prior art are: 1. The housing contains only a permanent magnet wheel and a conductor wheel, which are placed on the load and motor shaft respectively. The structure is simple and easy to install.

[0013] 2. The enclosure wall is sealed to the load shaft and motor shaft with a frictionless seal to prevent liquid leakage inside the enclosure, making it leak-proof and maintenance-free.

[0014] 3. The motor is fixed on the adjustment mechanism to complete the movement. The adjustment mechanism is waterproof, dustproof and maintenance-free.

[0015] 4. The overall installation is simple and takes up little space. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the liquid cooling box in this utility model; Figure 3 yes Figure 2 A magnified view of part A in the middle; Figure 4 This is an enlarged view of the sealing structure between the end cover flange and the load shaft sleeve; Figure 5 This is the front view of this utility model; Figure 6 This is a schematic diagram of a semi-circular liquid cooling box; Figure 7 This is a schematic diagram of a circular liquid cooling box.

[0017] In the diagram: 1. Motor; 2. Liquid cooling box; 3. Load; 4. Slide plate; 5. Protective cover; 6. Base plate; 7. Extension plate; 8. Motor shaft; 9. Motor shaft sleeve; 10. Conductor wheel; 11. Inner composite ring; 12. Outer composite ring; 13. Inner heat dissipation fins; 14. Outer heat dissipation fins; 15. Permanent magnet ring; 16. Permanent magnet ring wheel; 17. End cover flange; 18. Load shaft sleeve; 181. Annular channel; 19. Load shaft; 20. Liquid collection tank; 21. Oil return pipe. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments.

[0019] The description of this utility model is merely a structural or even functional description of the embodiments, and the scope of this utility model is not limited by the embodiments described herein.

[0020] like Figures 1-5 As shown, this embodiment is achieved through the following technical solution: a maintenance-free liquid-cooled permanent magnet speed regulation system, including a motor 1, a liquid-cooled box 2 and a load 3. The outer shell of the liquid-cooled box is square, and the medium inside the liquid-cooled box is cooled by external circulation. The load 3 can be a centrifugal water pump, a fan, etc.

[0021] The motor shaft 8 is connected to the conductor wheel, and the load shaft 19 is connected to the permanent magnet wheel. The conductor wheel and the permanent magnet wheel are coupled inside the liquid cooling box 2. The motor 1 can move along its axial direction to adjust the distance between the conductor wheel and the permanent magnet wheel. The conductor wheel is installed at the end of the motor shaft sleeve 9, which is fitted onto the motor shaft 8. The permanent magnet wheel is installed at the end of the load shaft sleeve 18, which is fitted onto the load shaft 19. The liquid cooling box 2 has end cover flanges 17 at both ends. The rotating shafts at both ends pass through the end cover flanges 17 to connect to the conductor wheel or the permanent magnet wheel. The end cover flanges 17 and the shafts are sealed with a frictionless seal. The inner wall of the end cover flanges 17 has multiple annular grooves 181, which can gradually reduce oil penetration and improve sealing performance.

[0022] The conductor wheel in this embodiment includes a conductor wheel disk 10, an inner composite ring 11 and an outer composite ring 12 mounted on the conductor wheel disk 10. The inner wall of the inner composite ring 11 is provided with inner heat dissipation fins 13, and the outer wall of the outer composite ring 12 is provided with outer heat dissipation fins 14. The permanent magnet wheel includes a permanent magnet ring disk 16, on which a permanent magnet ring 15 is mounted. The permanent magnet ring 15 is located between the inner composite ring 11 and the outer composite ring 12 for coupling.

[0023] In this embodiment, a liquid collection tank 20 is provided below the end cover flange 17 outside the liquid cooling box 2. One end of the return oil pipe 21 is connected to the bottom of the liquid collection tank 20, and the other end of the return oil pipe 21 is connected back to the liquid cooling box 2. Even if a small amount of liquid leaks, it can flow back into the liquid cooling box through the liquid collection tank and the return oil pipe.

[0024] Motor 1 is fixed to slide plate 4, and a rubber pad is provided between motor 1 and slide plate 4 for shock absorption. Slide plate 4, under the action of the actuator, can drive motor 1 to move along its axial direction. The actuator in this embodiment can be an existing drive structure such as a gear and rack mechanism or a lead screw and nut mechanism. The actuator is fixed to base plate 6, and a protective cover 5 fixed to slide plate 4 is provided between base plate 6 and slide plate 4. The protective cover 5 completely covers the gap between base plate 6 and slide plate 4, providing waterproofing and dustproofing. Furthermore, both base plate 6 and slide plate 4 are rectangular and of equal size. One end of the top surface of base plate 6 is provided with an extension plate 7 to accommodate the movement stroke of slide plate 4, ensuring that the space between base plate 6 and slide plate 4 is always covered, preventing dust from entering.

[0025] like Figure 6 , 7 As shown, the liquid cooling box shell can also be semi-circular, circular, or other shapes.

[0026] This invention directly fixes the conductor wheel and permanent magnet wheel to the motor shaft 8 and load shaft 19 respectively via the motor shaft sleeve 9 and load shaft sleeve 18. The motor shaft 8 and load shaft 19 directly support the conductor wheel and permanent magnet wheel, eliminating the need for bearing support structures and skeleton oil seal sealing structures. This eliminates the need for maintenance of accessories. Furthermore, a frictionless seal can be directly applied between the end cover flange 17 and the shaft body. A small gap (typically 0.05-0.5mm) is maintained between the shaft and the end cover flange, using an oil film for isolation to prevent liquid leakage from the housing. There is no direct physical contact during operation, greatly simplifying the structure. The motor is fixed on the regulating actuator to complete axial movement, changing the coupling distance between the conductor wheel and permanent magnet wheel of the permanent magnet speed controller to achieve speed regulation.

[0027] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.

Claims

1. A maintenance-free liquid-cooled permanent magnet speed control system, comprising a motor (1), a liquid-cooled tank (2), and a load (3), wherein a motor shaft (8) is connected to a conductor wheel, and a load shaft (19) is connected to a permanent magnet wheel, the conductor wheel and the permanent magnet wheel being coupled within the liquid-cooled tank (2); the motor (1) can move along its axial direction to adjust the distance between the conductor wheel and the permanent magnet wheel, characterized in that, The conductor wheel is installed at the end of the motor shaft sleeve (9), and the motor shaft sleeve (9) is sleeved on the motor shaft (8); the permanent magnet wheel is installed at the end of the load shaft sleeve (18), and the load shaft sleeve (18) is sleeved on the load shaft (19); The liquid cooling box (2) is provided with end cover flanges (17) at both ends. The rotating shafts at both ends pass through the end cover flanges (17) to connect to the conductor wheel or permanent magnet wheel. The end cover flanges (17) and the shafts are sealed without friction.

2. The maintenance-free liquid-cooled permanent magnet speed regulating system according to claim 1, characterized in that, The inner wall of the end cover flange (17) has multiple annular grooves (181).

3. The maintenance-free liquid-cooled permanent magnet speed regulation system according to claim 1 or 2, characterized in that, Outside the liquid cooling box (2), a liquid collection tank (20) is provided below the end cover flange (17). The bottom of the liquid collection tank (20) is connected to one end of the return oil pipe (21), and the other end of the return oil pipe (21) is connected back to the liquid cooling box (2).

4. The maintenance-free liquid-cooled permanent magnet speed control system of claim 1, wherein, The motor (1) is fixed on the slide plate (4), and the slide plate (4) can drive the motor (1) to move along its axis under the action of the actuator.

5. The maintenance-free liquid-cooled permanent magnet speed regulating system according to claim 4, characterized in that, The actuator is fixed on the base plate (6), and a protective cover (5) is provided between the base plate (6) and the slide plate (4) and fixed on the slide plate (4). The protective cover (5) completely covers the gap between the base plate (6) and the slide plate (4).

6. The maintenance-free liquid-cooled permanent magnet speed control system of claim 5, wherein, The base plate (6) and the slide plate (4) are both rectangular and have the same size. An extension plate (7) is provided at one end of the top surface of the base plate (6).

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