A middle air outlet adjustment mechanism for a switched reluctance motor

Abstract

This utility model discloses a central air outlet adjustment mechanism for a switched reluctance motor, including a stator core for fixing the windings and a motor housing disposed outside the stator core. A ventilator is fixed to the inner ring of the stator core, and the inner cavity of the motor housing is provided with an adjustment structure capable of adjusting the size of the ventilator opening. By setting the adjustment structure, when the internal temperature of the motor reaches or exceeds a set threshold, the drive structure can move the stop block of the adjustment disc, allowing the ventilator opening to be fully or mostly exposed, ensuring that hot air from the core area of ​​the central heat source can be discharged through the ventilation cross-section. When the internal temperature of the motor is below the set threshold, the drive structure can rotate the adjustment disc, using the stop block to partially or completely block the ventilator opening, reducing the ventilation cross-sectional area and lowering the wind noise generated when airflow passes through the vent.

Description

Technical Field

[0001] This utility model relates to the field of switched reluctance motor technology, specifically to a middle air outlet adjustment mechanism for a switched reluctance motor. Background Technology

[0002] The main heat source of a switched reluctance motor is the stator. Copper losses are generated when current flows through the stator windings, and iron losses are generated in the stator core under rapid changes in the magnetic field. The heat generated by these losses is mainly concentrated in the stator core and windings in the middle of the motor. Placing the air outlet in the middle allows the hottest air to be quickly and directly exhausted from the core heat source area.

[0003] A search revealed a switched reluctance motor disclosed in patent application CN211429020U. The motor includes a motor body and a stator. The opening width of the core slot is smaller than the bottom width. A ventilator is fixedly installed at the bottom of the core slot. The ventilator includes two side plates protruding into the core slot, forming a peripherally sealed ventilation channel between the two side plates. The ventilation channel is parallel to the through direction of the core slot, and the side plates are parallel to the sidewalls of adjacent core slots. A winding is fixed between the side plates and the sidewalls of adjacent core slots. This ventilator design prevents blockage of the ventilation channel during the winding impregnation process, ensuring unobstructed ventilation.

[0004] The aforementioned patent improves the central heat dissipation efficiency by fixing a ventilator on the surface of the stator core. However, the cross-sectional area of ​​the ventilator is fixed, and the central air outlet is a fixed opening that cannot be adjusted. When the internal temperature of the switched reluctance motor does not reach the set conditions for efficient heat dissipation, noise reduction inside the motor cannot be achieved by reducing the size of the central air outlet. Utility Model Content

[0005] The purpose of this utility model is to provide a middle air outlet adjustment mechanism for a switched reluctance motor. By setting an adjustment turntable with a stop block on one side of the stator core, and driving the adjustment turntable to rotate by a drive motor, the stop block blocks the ventilation body, thereby adjusting the cross-section of the ventilation outlet. When the temperature is below a set threshold, the internal noise of the motor can be reduced by reducing the cross-section of the ventilation outlet.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a middle air outlet adjustment mechanism for a switched reluctance motor, comprising a stator core for fixing the windings and a motor housing disposed outside the stator core, wherein a ventilator is fixed to the inner ring of the stator core, and the inner cavity of the motor housing is provided with an adjustment structure capable of adjusting the size of the ventilator opening;

[0007] The adjustment structure includes an adjustment turntable and an inner limiting ring integrally formed on one side of the adjustment turntable. A bearing is fixed to the outer wall of the inner limiting ring. An outer limiting ring is fixed inside the motor housing by screws. The outer wall of the bearing outer ring is fixedly connected to the inner wall of the outer limiting ring. A drive structure for driving the adjustment turntable to rotate is installed outside the motor housing.

[0008] Preferably, the adjusting turntable includes a plurality of blocks integrally formed on the inner wall of the inner limiting ring, the blocks being arranged in a circumferential array, and a groove being formed between adjacent blocks.

[0009] Preferably, the inner wall of the stator core inner ring is provided with a plurality of mounting slots for fixing the windings and the ventilator. Each mounting slot contains two windings, and the ventilator is fixed between the two windings. The plurality of mounting slots are arranged in a circumferential array.

[0010] Preferably, the number of the baffles is the same as the number of ventilation bodies, and the baffles are located on one side of the ventilation bodies.

[0011] Preferably, the drive structure includes a micro motor, the output end of which is fixed with a gear, the outer wall of the motor housing is provided with a clearance groove, the outer wall of the adjusting turntable is fixed with teeth, the gear meshes with the teeth, and a sealing structure is provided at the clearance groove of the motor housing.

[0012] Preferably, the sealing structure includes an extended housing, which is fixed to the outer wall of the motor housing by screws, and the micro motor is mounted on the outside of the extended housing by screws.

[0013] Preferably, the sealing structure further includes a sealing ring, the central shaft of the gear is rotatably connected inside the extended housing, one end of the central shaft of the gear passes through the extended housing, and the sealing ring is installed at the contact portion between the central shaft of the gear and the housing.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention features an adjustment structure. When the internal temperature of the motor reaches or exceeds a set threshold, the adjustment disc can be moved away by the drive structure, allowing the ventilation opening to be fully or mostly exposed, ensuring that hot air from the core area of ​​the central heat source can be discharged through the ventilation cross-section. When the internal temperature of the motor is below the set threshold, the adjustment disc can be rotated by the drive structure, using the block to partially or completely block the ventilation opening, reducing the ventilation cross-sectional area and lowering the wind noise generated when airflow passes through the ventilation opening. Attached Figure Description

[0016] Figure 1 This is an isometric drawing of this utility model;

[0017] Figure 2 This is an exploded view of this utility model;

[0018] Figure 3 This is a schematic diagram of the inner limit ring structure at the bottom of the adjusting turntable of this utility model;

[0019] Figure 4 This is a schematic diagram showing the location of the ventilation body of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the ventilation body of this utility model;

[0021] Figure 6 This is a schematic diagram showing the positions of the stator core, outer limiting ring, and drive structure of this utility model after installation with the motor housing;

[0022] Figure 7 This is a utility model Figure 6 Enlarged view of point A in the middle.

[0023] In the diagram: 1. Stator core; 2. Motor housing; 3. Ventilation body; 4. Adjustment structure; 401. Adjustment turntable; 402. Inner limit ring; 403. Bearing; 404. Outer limit ring; 5. Drive structure; 101. Stop block; 102. Slot; 103. Mounting slot; 104. Winding; 501. Micro motor; 502. Gear; 503. Relief slot; 504. Tooth; 505. Extended housing; 506. Sealing ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, those skilled in the art who have not made any innovative embodiments are all within the protection scope of the present utility model.

[0025] Please see Figure 1-7 This utility model provides a technical solution: a middle air outlet adjustment mechanism for a switched reluctance motor, including a stator core 1 for fixing the winding 104 and a motor housing 2 disposed outside the stator core 1. A ventilation body 3 is fixed to the inner ring of the stator core 1, and an adjustment structure 4 is provided in the inner cavity of the motor housing 2 to adjust the size of the opening of the ventilation body 3.

[0026] The adjustment structure 4 includes an adjustment turntable 401 and an inner limiting ring 402 integrally formed on one side of the adjustment turntable 401. A bearing 403 is fixed to the outer wall of the inner limiting ring 402. An outer limiting ring 404 is fixed inside the motor housing 2 by screws. The outer wall of the outer ring of the bearing 403 is fixedly connected to the inner wall of the outer limiting ring 404. A drive structure 5 for driving the adjustment turntable 401 to rotate is installed on the outside of the motor housing 2.

[0027] The rotation of the adjusting turntable 401 causes the position of the stop block 101 to change, thus blocking or exposing the ventilation opening. Its rotation angle determines the degree to which the stop block 101 blocks the ventilation opening. The inner limit ring 402 is used to connect with the inner ring of the bearing 403 and provides a mounting base for the stop block 101. The inner ring of the bearing 403 is fixed to the inner limit ring 402, and the outer ring is fixed to the outer limit ring 404, supporting the free rotation of the adjusting turntable 401.

[0028] The adjusting turntable 401 includes a plurality of blocks 101 integrally formed on the inner wall of the inner limiting ring 402. The blocks 101 are arranged in a circumferential array, and a groove 102 is formed between adjacent blocks 101.

[0029] The slot 102 is the gap between adjacent stops 101. When the adjusting turntable 401 rotates, the slot 102 moves to the front of different ventilation body 3 openings. The area of ​​the slot 102 that fully exposes the ventilation body 3 opening forms an effective ventilation channel.

[0030] The inner wall of the inner ring of the stator core 1 is provided with a plurality of mounting slots 103 for fixing the windings 104 and the ventilation body 3. Each mounting slot 103 contains two windings 104, and the ventilation body 3 is fixed between the two windings 104. The plurality of mounting slots 103 are arranged in a circular array.

[0031] The winding 104 generates a magnetic field when energized, which is the main source of copper loss heat. The vent 3 is fixed between the two windings 104. The structure of the stator core 1 is the same as that of the stator core 1 in the prior art patent application number CN211429020U. The installation structure of the stator core 1 and the motor housing 2 is the same as that of the prior art, and will not be described again.

[0032] The number of the baffles 101 is the same as that of the ventilation body 3, and the baffles 101 are located on one side of the ventilation body 3.

[0033] When the baffle 101 is rotated to align with the opening of the ventilator 3, it reduces the effective ventilation area. The area it blocks determines the size of the vent opening.

[0034] The drive structure 5 includes a micro motor 501, a gear 502 is fixed at the output end of the micro motor 501, a clearance groove 503 is provided on the outer wall of the motor housing 2, teeth 504 are fixed on the outer wall of the adjusting turntable 401, the gear 502 meshes with the teeth 504, and a sealing structure is provided at the clearance groove 503 of the motor housing 2.

[0035] The gear 502 on the micro motor 501 meshes with the teeth 504 on the outer edge of the adjusting turntable 401. When the micro motor 501 rotates, the gear 502 drives the teeth 504, thereby driving the entire adjusting turntable 401 to rotate. The slot 503, which is a groove on the side wall of the motor housing 2, provides space for the meshing of the gear 502 and the teeth 504.

[0036] The sealing structure includes an extended housing 505, which is fixed to the outer wall of the motor housing 2 by screws, and the micro motor 501 is mounted on the outside of the extended housing 505 by screws.

[0037] The extended housing 505 is fixed to the outer wall of the motor housing 2 by screws, covering the area of ​​the relief groove 503, providing a mounting platform for the micro motor 501, and at the same time protecting the meshing gears 502 and teeth 504.

[0038] The sealing structure also includes a sealing ring 506. The central shaft of the gear 502 is rotatably connected inside the extended housing 505. One end of the central shaft of the gear 502 passes through the extended housing 505, and the sealing ring 506 is installed at the contact portion between the central shaft of the gear 502 and the housing.

[0039] When in use, when the internal temperature sensor of the motor detects that the temperature reaches or exceeds the set threshold, the control system starts the micro motor 501. The micro motor 501 drives the adjustment turntable 401 to rotate through the gear 502. When the adjustment turntable 401 rotates, the stop block 101 on it rotates accordingly and moves away from the position in front of the opening of the ventilation body 3, so that the opening of the ventilation body 3 is fully or mostly exposed.

[0040] Specifically, three temperature threshold zones can be set for the exposed area. The temperature sensor detects the threshold zone reached, and the motor control system controls the micro motor 501 to rotate at a certain angle to open different areas.

[0041] For example, the low temperature threshold is set to 40°C-80°C, and the high temperature threshold is set to two groups: 80°C-100°C and 100°C-120°C. When the temperature sensor detects that the temperature reaches between 40°C and 80°C, the motor control system controls the micro motor 501 to rotate 5°, so that the baffle 101 blocks two-thirds of the cross-section of the ventilation body 3. When the temperature sensor detects that the temperature reaches between 80°C and 100°C, the motor control system controls the micro motor 501 to rotate 10°, so that the baffle 101 blocks only one-third of the cross-section of the ventilation body 3. When the temperature sensor detects that the temperature reaches between 100°C and 120°C, the motor control system controls the micro motor 501 to rotate 15°, so that the baffle 101 completely moves away from the cross-section of the ventilation body 3, thereby achieving different ventilation area adjustments and reducing wind noise within the low temperature threshold.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A middle air outlet adjustment mechanism for a switched reluctance motor, characterized in that: It includes a stator core (1) for fixing the winding (104) and a motor housing (2) disposed outside the stator core (1). The inner ring of the stator core (1) is fixed with a ventilator (3), and the inner cavity of the motor housing (2) is provided with an adjustment structure (4) that can adjust the size of the opening of the ventilator (3). The adjustment structure (4) includes an adjustment turntable (401) and an inner limiting ring (402) integrally formed on one side of the adjustment turntable (401). The outer wall of the inner limiting ring (402) is fixed with a bearing (403). The motor housing (2) is fixed with an outer limiting ring (404) by screws. The outer wall of the outer ring of the bearing (403) is fixedly connected to the inner wall of the outer limiting ring (404). The motor housing (2) is equipped with a drive structure (5) for driving the adjustment turntable (401) to rotate.

2. The middle air outlet adjusting mechanism of a switched reluctance motor according to claim 1, characterized in that: The adjusting turntable (401) includes a plurality of blocks (101) integrally formed on the inner wall of the inner limiting ring (402). The blocks (101) are arranged in a circumferential array, and a groove (102) is formed between adjacent blocks (101).

3. The middle air outlet adjustment mechanism of a switched reluctance motor according to claim 2, characterized in that: The inner wall of the inner ring of the stator core (1) is provided with a number of mounting slots (103) for fixing the windings (104) and the ventilation body (3). Two windings (104) are placed in each mounting slot (103). The ventilation body (3) is fixed between the two windings (104). The mounting slots (103) are arranged in a circular array.

4. The middle air outlet adjustment mechanism of a switched reluctance motor according to claim 3, characterized in that: The number of the baffles (101) is the same as that of the ventilation body (3), and the baffles (101) are located on one side of the ventilation body (3).

5. The middle air outlet adjustment mechanism of a switched reluctance motor according to claim 4, characterized in that: The drive structure (5) includes a micro motor (501), the output end of which is fixed with a gear (502), the outer wall of the motor housing (2) is provided with a clearance groove (503), the outer wall of the adjusting turntable (401) is fixed with teeth (504), the gear (502) meshes with the teeth (504), and a sealing structure is provided at the clearance groove (503) of the motor housing (2).

6. The middle air outlet adjustment mechanism of a switched reluctance motor according to claim 5, characterized in that: The sealing structure includes an extended housing (505), which is fixed to the outer wall of the motor housing (2) by screws, and the micro motor (501) is mounted on the outside of the extended housing (505) by screws.

7. The middle air outlet adjustment mechanism of a switched reluctance motor according to claim 6, characterized in that: The sealing structure also includes a sealing ring (506), the central shaft of the gear (502) is rotatably connected inside the extended housing (505), one end of the central shaft of the gear (502) passes through the extended housing (505), and the sealing ring (506) is installed at the contact part between the central shaft of the gear (502) and the housing.

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