Novel heat dissipation structure of super-high-speed permanent magnet motor

Abstract

The utility model discloses a novel heat dissipation structure of super high speed permanent magnet motor, including the air inlet of being established on the left side plate of casing, the air outlet of being established on the end cover, the outer air flow channel of being established between the inner circle of casing and the positioning outer circle, the middle air flow gap of being established between the inner circle of stator and the outer circle of rotor and the inner air flow channel of being established in the main shaft inside. The utility model discloses through the cold air or normal temperature air of injection and passes through the design outer air flow channel, middle air flow gap and inner air flow channel, take out the heat of stator, rotor and produce casing, ensure that stator and rotor are in the working environment of lower temperature when working, avoid the high speed motor internal permanent magnet high temperature demagnetization, to reach the performance requirement.

Description

Technical Field

[0001] This utility model belongs to the field of permanent magnet motor technology, specifically relating to a novel heat dissipation structure for ultra-high-speed permanent magnet motors. Background Technology

[0002] High-speed permanent magnet synchronous motors (PMSMs) have advantages such as small size, high power density, and high efficiency, and are widely used in practical engineering. However, the high speed and large current of high-speed PMSMs result in significantly higher stator heat generation and rotor windage losses compared to ordinary PMSMs. Furthermore, their small size makes heat dissipation difficult, easily leading to excessive temperature rise and demagnetization of the permanent magnets. Therefore, improvements to the heat dissipation structure of high-speed PMSMs are urgently needed. Utility Model Content

[0003] In order to solve the above-mentioned technical problems in the prior art, this utility model provides a novel heat dissipation structure for ultra-high speed permanent magnet motors that is simple in structure and has good heat dissipation effect.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a novel heat dissipation structure for an ultra-high-speed permanent magnet motor. The ultra-high-speed permanent magnet motor includes a housing, with an open right end and an end cover. A stator is fixedly mounted on the inner circle of the housing. A main shaft is rotatably mounted between the left side plate of the housing and the end cover via a bearing. A rotor located inside the stator is mounted on the main shaft. The heat dissipation structure includes an air inlet on the left side plate of the housing, an air outlet on the end cover, an external airflow channel between the inner circle of the housing and the outer circle of the positioning, a middle airflow gap between the inner circle of the stator and the outer circle of the rotor, and an internal airflow channel inside the main shaft.

[0005] Several external airflow channels are evenly arranged along the circumference of the stator. The length direction of each external airflow channel is parallel to the center line of the main shaft, and the external airflow channels are open to both sides inside the rotor.

[0006] The airflow gap in the middle is a circular gap channel that is open on both sides.

[0007] The internal airflow channel includes a central hole opened inside the main shaft, a first air hole communicating with the central hole on the left side of the rotor in the radial direction on the main shaft, and a second air hole communicating with the central hole on the right side of the rotor in the radial direction on the main shaft.

[0008] Using the above technical solution, the heat dissipation principle and process of this utility model are as follows: By injecting filtered cold air or room temperature air into the air inlet, a portion of the heat dissipation airflow cools the stator outer circle from left to right through the external airflow channel. The second portion of the heat dissipation airflow cools the rotor outer circle and the stator inner circle through the middle airflow gap. The third portion of the heat dissipation airflow enters the central hole inside the main shaft through the first air hole and then exits through the second air hole. The three portions of heat dissipation airflow converge on the right side inside the casing and finally exit through the air outlet on the end cover, thereby achieving rapid and effective heat dissipation for the stator and rotor.

[0009] The stator includes an armature fixedly connected to the housing and coil windings mounted on the armature. An external airflow channel is located on the outer circumference of the armature, and the cross-section of the external airflow channel is rectangular.

[0010] The center hole of the spindle extends to the right end face, meaning the center hole is a blind hole, drilled from the right end face of the spindle for ease of manufacturing. To ensure spindle strength, the spindle has 2-3 first and second vent holes.

[0011] In summary, this invention uses injected cold or ambient air to pass through the designed external airflow channel, middle airflow gap, and internal airflow channel to carry the heat generated by the stator and rotor out of the casing, ensuring that the stator and rotor are in a low-temperature working environment during operation. This avoids high-temperature demagnetization of the permanent magnets inside the high-speed motor, thus achieving the performance requirements. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 for Figure 1 Sectional view of AA;

[0014] Figure 3 for Figure 1 BB section view. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] like Figure 1 , Figure 2 and Figure 3As shown, a novel heat dissipation structure for an ultra-high-speed permanent magnet motor is disclosed. The ultra-high-speed permanent magnet motor includes a housing 1, with an open right end and an end cover 2. A stator (including an armature 3 fixedly connected to the housing 1 and coil windings 4 on the armature 3) is fixedly mounted on the inner circle of the housing 1. A main shaft 6 is rotatably mounted between the left side plate of the housing 1 and the end cover 2 via a bearing 5. A rotor 7 located inside the stator is mounted on the main shaft 6. The heat dissipation structure includes an air inlet 8 on the left side plate of the housing 1, an air outlet 9 on the end cover 2, an external airflow channel 10 between the inner circle of the housing 1 and the outer circle of the positioning, a middle airflow gap 11 between the inner circle of the stator and the outer circle of the rotor 7, and an internal airflow channel inside the main shaft 6.

[0017] Several external airflow channels 10 are evenly arranged along the circumference of the stator. The external airflow channels 10 are located on the outer circle of the armature 3, and the cross-section of the external airflow channels 10 is rectangular. The length direction of each external airflow channel 10 is parallel to the center line of the main shaft 6, and the external airflow channels 10 are open to the left and right inside the rotor 7.

[0018] The airflow gap 11 is a circular gap channel that is open on both sides.

[0019] The internal airflow channel includes a central hole 12 opened inside the main shaft 6, a first air hole 13 that communicates with the central hole 12 is opened on the left side of the rotor 7 in the radial direction on the main shaft 6, and a second air hole 14 that communicates with the central hole 12 is opened on the right side of the rotor 7 in the radial direction on the main shaft 6.

[0020] The heat dissipation principle and process of this utility model are as follows: By injecting filtered cold air or room temperature air into the air inlet 8, a portion of the heat dissipation airflow cools the stator outer circle from left to right through the external airflow channel 10. The second portion of the heat dissipation airflow cools the rotor 7 outer circle and the stator inner circle through the middle airflow gap 11. The third portion of the heat dissipation airflow enters the central hole 12 inside the main shaft 6 through the first air hole 13 and then exits through the second air hole 14. The three portions of heat dissipation airflow converge on the right side inside the housing 1 and finally exit through the air outlet 9 on the end cover 2, thereby achieving rapid and effective heat dissipation of the stator and rotor 7.

[0021] The center hole 12 of the spindle 6 extends to the right end face, meaning the center hole 12 is a blind hole, drilled from the right end face of the spindle 6 for ease of manufacturing. While ensuring the strength of the spindle 6, the spindle 6 has 2-3 first air holes 13 and second air holes 14.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A novel heat dissipation structure for an ultra-high-speed permanent magnet motor, the ultra-high-speed permanent magnet motor comprising a housing, an open right end with an end cover, a stator fixedly mounted on the inner circle of the housing, and a main shaft rotatably mounted between the left side plate of the housing and the end cover via a bearing, the main shaft carrying a rotor located inside the stator, characterized in that: The heat dissipation structure includes an air inlet on the left side plate of the housing, an air outlet on the end cover, an external airflow channel between the inner circle of the housing and the outer circle of the positioning, a medium airflow gap between the inner circle of the stator and the outer circle of the rotor, and an internal airflow channel inside the main shaft.

2. The novel heat dissipation structure for ultra-high-speed permanent magnet motors according to claim 1, characterized in that: Several external airflow channels are evenly arranged along the circumference of the stator. The length direction of each external airflow channel is parallel to the center line of the main shaft, and the external airflow channels are open to both sides inside the rotor.

3. The novel heat dissipation structure for ultra-high-speed permanent magnet motors according to claim 1, characterized in that: The airflow gap in the middle is a circular gap channel that is open on both sides.

4. The novel heat dissipation structure for ultra-high-speed permanent magnet motors according to claim 1, characterized in that: The internal airflow channel includes a central hole opened inside the main shaft, a first air hole communicating with the central hole on the left side of the rotor in the radial direction on the main shaft, and a second air hole communicating with the central hole on the right side of the rotor in the radial direction on the main shaft.

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