A high-power airflow cooling permanent magnet speed control system

Abstract

This utility model belongs to the technical field of permanent magnet speed regulators, specifically relating to a high-power airflow cooling permanent magnet speed regulation system. It includes a motor, a conductor wheel, a permanent magnet wheel, and a load. The conductor wheel includes a conductor disc, with an outer composite ring and an inner composite ring on the side facing the permanent magnet wheel, forming two concentric rings. The outer circumference of the outer composite ring has outer heat dissipation fins, and the inner circumference of the inner composite ring has inner heat dissipation fins. An inter-ring ventilation port is formed between the outer and inner composite rings on the conductor disc, and inter-ring guide vanes are provided within the inter-ring ventilation port. An inner-ring ventilation port is formed at the corresponding position of the inner heat dissipation fins on the conductor disc, and inner-ring guide vanes are provided within the inner-ring ventilation port. The permanent magnet wheel includes a permanent magnet disc, with a permanent magnet ring on the disc, coupled between the outer and inner composite rings. This utility model, through its double-cylinder structure and reasonable heat dissipation design, can significantly increase power and meet the needs of more high-power operating conditions.

Description

Technical Field

[0001] This utility model relates to a high-power airflow cooling permanent magnet speed regulation system, belonging to the technical field of permanent magnet speed regulators. Background Technology

[0002] In the field of industrial transmission, permanent magnet speed controllers, as a type of speed control device, exhibit many significant advantages, such as no need for direct electrical connection, soft-start function, overload protection, and excellent speed control performance, thus gaining widespread application. According to Clause 7.2a) of the "General Technical Specification for Permanent Magnet Speed ​​Controllers" GB / T38774-2020, in the current market environment, there are strict specifications for the conductor disk temperature of air-cooled permanent magnet speed controllers: the temperature must not exceed 120℃; once the temperature exceeds 135℃, an alarm signal must be set; when the temperature exceeds 145℃, the active end should stop.

[0003] However, existing air-cooled permanent magnet speed controllers have several limitations. First, their power output is mostly concentrated around 400kW, which is insufficient to meet the actual needs of high-power applications. Furthermore, most products use a single-cylinder structure, which has significant shortcomings in heat dissipation performance. Second, to ensure effective heat dissipation, the only solution is to increase the radial and axial dimensions to expand the heat dissipation area, but this significantly increases the device's size. When the device size increases to a certain extent, it negatively impacts the performance and efficiency of the motor and load, thus hindering further improvements in the size and power of permanent magnet speed controllers. In addition, in some applications with high power requirements, existing air-cooled permanent magnet speed controllers cannot meet the needs, often requiring additional water-cooling or oil-cooling equipment. This undoubtedly increases procurement costs and also raises the difficulty and cost of subsequent maintenance.

[0004] In addition, most current permanent magnet speed controllers are supported by a housing or support base. A mechanism designed on the housing or support base drives the conductor wheel to move axially, thereby adjusting the coupling distance. This integrates the permanent magnet speed controller, actuator, etc., which complicates the structure and increases the axial dimension, occupying a large space. Utility Model Content

[0005] Based on the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a high-power airflow cooling permanent magnet speed regulation system that can achieve high-power operation while ensuring good heat dissipation effect, while reducing the size of the equipment, reducing the impact on the performance and efficiency of the motor and load, reducing the need for water cooling or oil cooling equipment, and saving procurement and maintenance costs.

[0006] The high-power airflow cooling permanent magnet speed regulation system of this utility model includes a motor, a conductor wheel, a permanent magnet wheel, and a load. The motor shaft is connected to the conductor wheel, and the load shaft is connected to the permanent magnet wheel. The conductor wheel and the permanent magnet wheel are coupled. The motor can move along its axial direction to adjust the distance between the conductor wheel and the permanent magnet wheel. The conductor wheel includes a conductor disc. An outer composite ring and an inner composite ring are provided on the side of the conductor disc facing the permanent magnet wheel. The outer composite ring is fixed on the outer circle of the conductor disc, and the inner composite ring is fixed on the side of the conductor disc and is coaxially arranged with the outer composite ring to form two concentric rings. Several outer heat dissipation fins are arranged on the outer circle of the outer composite ring, and several inner heat dissipation fins are arranged on the inner circle of the inner composite ring. On the conductor wheel, several inter-ring ventilation openings are provided between the outer composite ring and the inner composite ring, and inter-ring guide vanes are provided inside the inter-ring ventilation openings; on the conductor wheel, several intra-ring ventilation openings are provided at the corresponding positions of the inner heat dissipation fins, and intra-ring guide vanes are provided inside the intra-ring ventilation openings. The permanent magnet wheel includes a permanent magnet ring disc, with a permanent magnet ring on the side of the permanent magnet ring disc facing the conductor wheel. The permanent magnet ring is coupled between the outer composite ring and the inner composite ring.

[0007] The utility model conductor wheel has a double-cylinder structure. During operation, the magnetic lines of force cut the inner and outer composite rings simultaneously, and the generated torque and heat are shared by the two composite rings. By using guide vanes, static air is transformed into flowing air, which enhances airflow, improves heat dissipation efficiency, and allows for greater power output and smaller size.

[0008] Both the outer and inner heat dissipation fins are arranged at an angle. While possessing sufficient heat absorption mass and heat dissipation area, the heat dissipation fins further enhance airflow and ensure shear wind speed, thereby reducing temperature.

[0009] Both the external and internal heat dissipation fins are arranged in groups for easy installation.

[0010] Preferably, the tilt angle of the heat dissipation fins, that is, the angle between the heat dissipation fins and the axial direction of the conductor wheel, is 25°~30°.

[0011] Preferably, the tilt angle of the guide vane, that is, the angle between the guide vane and the axial direction of the conductor wheel, is 17.5°~25°.

[0012] The conductor wheel is connected to the motor shaft sleeve at the center and is connected to the motor shaft through the motor shaft sleeve; the permanent magnet ring wheel is connected to the load shaft sleeve at the center and is connected to the load shaft through the load shaft sleeve, so there is no need to set up a housing or support base for support.

[0013] The motor is fixed to the slide plate, which, under the action of the actuator, can drive the motor to move along its axis. The actuator can be an existing drive structure such as a gear and rack mechanism or a lead screw and nut mechanism. The motor is directly fixed to the support plate of the actuator, thus reducing the axial dimension and occupying less space.

[0014] 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, and the actuator is waterproof and dustproof.

[0015] 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 covered to prevent dust from entering.

[0016] The advantages of this utility model compared with the prior art are: 1. Enhanced High-Power Operation Capacity: The conductor wheel adopts a double-cylinder structure. During operation, the magnetic lines of force simultaneously cut through the inner and outer composite rings, and the resulting torque and heat are shared by the two composite rings. Compared to the traditional single-cylinder structure, this design can effectively distribute heat and load, enabling the permanent magnet speed control system to withstand greater power and meet the actual needs of high-power operating conditions. 2. Significantly enhanced heat dissipation: 2.1 Optimized heat dissipation fin design: Both the outer and inner heat dissipation fins are arranged at an angle, which not only increases the heat dissipation area and gives the heat dissipation fins sufficient heat absorption mass, but also further enhances airflow, ensures airflow velocity, and effectively reduces the temperature of the conductor wheel.

[0017] 2.2 Enhanced Heat Dissipation with Guide Vanes: By setting guide vanes between and within the coils, and utilizing the inclined design of the guide vanes, static air is transformed into flowing air, enhancing airflow within the conductor wheel and further improving heat dissipation. This allows for effective exhaust of air between the conductor wheel and the permanent magnet wheel, significantly improving heat dissipation efficiency. This overcomes the limitation that most existing air-cooled permanent magnet speed controllers have power ratings concentrated around 400kW.

[0018] 3. Significantly Reduced Equipment Size: Due to improved heat dissipation efficiency, there is no need to increase the heat dissipation area by increasing radial and axial dimensions as in existing technologies. While ensuring good heat dissipation, this permanent magnet speed control system can achieve a more compact structural design, reducing the equipment size. This not only reduces the equipment's installation space requirements but also minimizes adverse effects on motor and load performance and efficiency, facilitating further improvements in the size and power of permanent magnet speed controllers.

[0019] 4. Cost reduction: Reduced need for additional cooling equipment: In some applications with high power requirements, existing air-cooled permanent magnet speed controllers often require additional water-cooling or oil-cooling equipment to meet heat dissipation needs, which increases procurement costs. This invention, however, effectively solves the heat dissipation problem under high power conditions through optimized airflow heat dissipation design, eliminating the need for additional water-cooling or oil-cooling equipment and thus saving procurement costs.

[0020] 5. Simplified Structure and Reduced Maintenance Costs: Eliminating water-cooling or oil-cooling equipment reduces the workload and costs associated with its maintenance. Furthermore, the overall structure eliminates the bearing support structure and internal actuators, utilizing existing, mature drive mechanisms such as gear and rack mechanisms and lead screw and nut mechanisms to directly act on the motor, reducing potential failure points and further lowering maintenance difficulty and costs. Additionally, a protective cover is installed between the base plate and the slide plate, and an extension plate is provided at one end of the base plate's top surface, ensuring waterproof and dustproof functions, optimizing the equipment's protective performance, and reducing the frequency of maintenance. Attached Figure Description

[0021] Figure 1 This is one of the overall structural schematic diagrams (three-dimensional) of this utility model; Figure 2 This is the second schematic diagram of the overall structure of this utility model (front view); Figure 3 This is a cross-sectional view showing the relationship between the conductor wheel and the permanent magnet wheel of this utility model; Figure 4 This is a perspective view of the relationship between the conductor wheel and the permanent magnet wheel of this utility model; Figure 5 One of the structural schematic diagrams of the conductor wheel in this utility model; Figure 6 The second schematic diagram of the conductor wheel in this utility model.

[0022] In the diagram: 1. Motor; 2. Conductor wheel; 3. Permanent magnet wheel; 4. Load; 5. Slide plate; 6. Protective cover; 7. Base plate; 8. Extension plate; 21. Conductor wheel; 22. Outer composite ring; 23. Inner composite ring; 24. Outer heat dissipation fins; 25. Inner heat dissipation fins; 26. Motor shaft sleeve; 27. Inter-ring guide vanes; 28. Inner ring guide vanes; 291. Inter-ring vent; 292. Inner ring vent; 31. Permanent magnet ring wheel; 32. Permanent magnet ring; 33. Load shaft sleeve. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments.

[0024] 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.

[0025] like Figures 1-6As shown, this embodiment is achieved through the following technical solution: a high-power airflow cooling permanent magnet speed regulation system, including a motor 1, a conductor wheel 2, a permanent magnet wheel 3 and a load 4, the motor shaft is connected to the conductor wheel 2, the load shaft is connected to the permanent magnet wheel 3, the conductor wheel 2 and the permanent magnet wheel 3 are coupled, and the motor 1 can move along its axial direction to realize the adjustment of the distance between the conductor wheel 2 and the permanent magnet wheel 3.

[0026] The conductor wheel 2 includes a conductor wheel disk 21. The conductor wheel disk 21 has an outer composite ring 22 and an inner composite ring 23 on the side facing the permanent magnet wheel 3. The outer composite ring 22 is fixed on the outer circle of the conductor wheel disk 21, and the inner composite ring 23 is fixed on the side of the conductor wheel disk 21 and is coaxially arranged with the outer composite ring 22 to form two concentric rings. The outer circle of the outer composite ring 22 is provided with a number of outer heat dissipation fins 24, and the inner circle of the inner composite ring 23 is provided with a number of inner heat dissipation fins 25. The outer heat dissipation fins 24 and the inner heat dissipation fins 25 are arranged in groups.

[0027] On the conductor wheel 21, several inter-ring ventilation openings 291 are formed between the outer composite ring 22 and the inner composite ring 23, and inter-ring guide vanes 27 are provided inside the inter-ring ventilation openings 291. On the conductor wheel 21, several intra-ring ventilation openings 292 are formed at positions corresponding to the inner heat dissipation fins 25, and intra-ring guide vanes 28 are provided inside the intra-ring ventilation openings 292. The ventilation openings and guide vanes are uniformly arranged in a circumferential array. Both the outer heat dissipation fins 24 and the inner heat dissipation fins 25 are arranged obliquely. In this embodiment, the tilt angle of the heat dissipation fins is 30°, and the tilt angle of the guide vanes is 20°.

[0028] In addition, the airflow direction (i.e., the blowing direction) of the inner and outer heat dissipation fins can be opposite, and the airflow direction of the inner and outer guide vanes can also be opposite (the airflow direction of the inner heat dissipation fins and the inner guide vanes is the same, and the airflow direction of the outer heat dissipation fins and the outer guide vanes is the same), so as to improve the heat dissipation effect by using forced convection.

[0029] The permanent magnet wheel 3 includes a permanent magnet ring disk 31. A permanent magnet ring 32 is provided on the side of the permanent magnet ring disk 31 facing the conductor wheel 2. The permanent magnet ring 32 is coupled between the outer composite ring 22 and the inner composite ring 23.

[0030] The conductor wheel 21 is connected to the motor shaft sleeve 26 in the center and is connected to the motor shaft through the motor shaft sleeve 26; the permanent magnet ring wheel 31 is connected to the load shaft sleeve 33 in the center and is connected to the load shaft through the load shaft sleeve 33, so there is no need to set up a box or support base for support.

[0031] Motor 1 is fixed to slide plate 5, and a rubber pad is provided between motor 1 and slide plate 5 for shock absorption. Slide plate 5, under the action of the actuator, can drive motor 1 to move along its axial direction. In this embodiment, the actuator can be an existing drive structure such as a gear and rack mechanism or a lead screw and nut mechanism. The motor is directly fixed to the support plate (i.e., slide plate 5) of the actuator, thus reducing the axial dimension and occupying less space. The actuator is fixed to the base plate 7, and a protective cover 6 fixed to slide plate 5 is provided between the base plate 7 and slide plate 5. The protective cover 6 completely covers the gap between the base plate 7 and slide plate 5, providing waterproofing and dustproofing. Furthermore, both the base plate 7 and slide plate 5 are rectangular and of equal size. An extension plate 8 is provided at one end of the top surface of the base plate 7 to accommodate the movement stroke of slide plate 5, ensuring that the space between the base plate 7 and slide plate 5 is always covered, preventing dust from entering.

[0032] The utility model's conductor wheel features a double-cylinder structure. During operation, magnetic lines of force simultaneously cut through the inner and outer composite rings, with the generated torque and heat shared by both rings. The heat dissipation fins possess sufficient heat absorption mass and heat dissipation area. Furthermore, the guide vanes and angled heat dissipation fins transform static air into flowing air, enhancing airflow and creating a pressure difference between the inner and outer air, ensuring air is expelled between the conductor wheel 2 and the permanent magnet wheel 3. This results in higher heat dissipation efficiency, allowing for greater power output and a smaller size.

[0033] This invention uses a motor shaft sleeve 26 and a load shaft sleeve 33 to directly fix the conductor wheel 2 and the permanent magnet wheel 3 onto the motor shaft and the load shaft, respectively. The motor shaft and the load shaft directly support the conductor wheel 2 and the permanent magnet wheel 3, eliminating the need for a bearing support structure, simplifying the overall structure, and reducing the axial dimension. 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 high-power airflow cooling permanent magnet speed regulation system, comprising a motor (1), a conductor wheel (2), a permanent magnet wheel (3), and a load (4), wherein the motor shaft is connected to the conductor wheel (2), the load shaft is connected to the permanent magnet wheel (3), the conductor wheel (2) and the permanent magnet wheel (3) are coupled, and the motor (1) can move along its axial direction to adjust the distance between the conductor wheel (2) and the permanent magnet wheel (3), characterized in that, The conductor wheel (2) includes a conductor wheel disk (21). The conductor wheel disk (21) is provided with an outer composite ring (22) and an inner composite ring (23) on the side facing the permanent magnet wheel (3). The outer composite ring (22) is fixed on the outer circle of the conductor wheel disk (21), and the inner composite ring (23) is fixed on the side of the conductor wheel disk (21) and is coaxially arranged with the outer composite ring (22) to form two concentric rings. The outer circle of the outer composite ring (22) is provided with a number of outer heat dissipation fins (24), and the inner circle of the inner composite ring (23) is provided with a number of inner heat dissipation fins (25). On the conductor wheel (21), several inter-ring ventilation openings (291) are provided between the outer composite ring (22) and the inner composite ring (23), and inter-ring guide vanes (27) are provided inside the inter-ring ventilation openings (291); on the conductor wheel (21), several intra-ring ventilation openings (292) are provided at the corresponding positions of the inner heat dissipation fins (25), and intra-ring guide vanes (28) are provided inside the intra-ring ventilation openings (292). The permanent magnet wheel (3) includes a permanent magnet ring disc (31), and a permanent magnet ring (32) is provided on the side of the permanent magnet ring disc (31) facing the conductor wheel (2). The permanent magnet ring (32) is coupled between the outer composite ring (22) and the inner composite ring (23).

2. The high-power airflow cooling permanent magnet speed regulation system according to claim 1, characterized in that, The outer heat dissipation fins (24) and the inner heat dissipation fins (25) are both arranged obliquely.

3. The high-power airflow cooling permanent magnet speed regulation system according to claim 2, characterized in that, The external heat dissipation fins (24) and the internal heat dissipation fins (25) are arranged in groups.

4. The high-power airflow cooling permanent magnet speed regulation system according to claim 2 or 3, characterized in that, The tilt angle of the heat dissipation fins is 25°~30°.

5. The high-power airflow cooling permanent magnet speed regulation system according to claim 1, characterized in that, The tilt angle of the guide vanes is 17.5°~25°.

6. The high-power airflow cooling permanent magnet speed regulation system according to claim 1, characterized in that, The conductor wheel (21) is connected to the motor shaft sleeve (26) in the center and is connected to the motor shaft through the motor shaft sleeve (26); the permanent magnet wheel (31) is connected to the load shaft sleeve (33) in the center and is connected to the load shaft through the load shaft sleeve (33).

7. The high-power airflow cooling permanent magnet speed regulation system according to claim 1, characterized in that, The motor (1) is fixed on the slide plate (5), and the slide plate (5) can drive the motor (1) to move along its axis under the action of the actuator.

8. The high-power airflow cooling permanent magnet speed regulation system according to claim 7, characterized in that, The actuator is fixed on the base plate (7), and a protective cover (6) is provided between the base plate (7) and the slide plate (5) and fixed on the slide plate (5). The protective cover (6) completely covers the gap between the base plate (7) and the slide plate (5).

9. The high-power airflow cooling permanent magnet speed regulation system according to claim 8, characterized in that, The base plate (7) and the slide plate (5) are both rectangular and have the same size. An extension plate (8) is provided at one end of the top surface of the base plate (7).

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