A cooling mechanism for a permanent magnet speed regulator

Abstract

The present invention discloses a cooling mechanism for a permanent magnet speed regulator, comprising a cooling liquid tank, a cooling liquid delivery pipeline, a plurality of first drainage chambers (2), a plurality of second drainage chambers (3) and a centrifugal flow channel (4); the present invention can directly cool the permanent magnet to prevent the temperature of the permanent magnet from rising to the demagnetization temperature, and can be applied to a speed regulator with a permanent magnet rotor as an inner rotor and a conductor rotor as an outer rotor.

Description

Technical Field

[0001] The invention relates to the field of speed regulators, in particular to a cooling mechanism for a permanent magnet speed regulator. Background Art

[0002] During the operation of the permanent magnet speed regulator, the conductor rotor cuts the magnetic flux lines to generate an induced current, which generates a large amount of heat. When the temperature is too high, the permanent magnet will be permanently demagnetized.

[0003] At present, air cooling is mostly used in small-power permanent magnet speed regulators. In high-power permanent magnet speed regulators, air cooling can no longer meet the needs, and water cooling must be used to reduce the temperature of conductors and permanent magnets. However, most water cooling structures cannot accurately cool permanent magnet speed regulators, and the cooling efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to provide a cooling mechanism for a permanent magnet speed regulator, comprising a cooling liquid tank, a cooling liquid delivery pipeline, a plurality of first drainage chambers, a plurality of second drainage chambers, a centrifugal flow channel, and heat dissipation ribs for auxiliary heat dissipation.

[0005] The first drainage cavity, the second drainage cavity and the centrifugal flow channel are used to cool the rotor components of the permanent magnet speed regulator. The rotor components of the permanent magnet speed regulator include an outer rotor of the permanent magnet speed regulator and an inner rotor of the permanent magnet speed regulator.

[0006] The outer rotor of the permanent magnet speed regulator comprises a conductor and a conductor yoke.

[0007] The inner rotor of the permanent magnet speed regulator comprises a permanent magnet and a permanent magnet yoke.

[0008] The permanent magnet is fixed in the permanent magnet slot of the permanent magnet yoke.

[0009] There is an air gap between the outer rotor of the permanent magnet speed regulator and the inner rotor of the permanent magnet speed regulator.

[0010] The coolant box sprays cooling water to the first drainage cavity and the second drainage cavity respectively through the coolant delivery pipeline.

[0011] The first drainage cavity, the second drainage cavity and the centrifugal flow channel are all arranged on the permanent magnet yoke of the inner rotor of the permanent magnet speed regulator.

[0012] The first drainage cavity and the second drainage cavity are arranged at intervals.

[0013] The second drainage cavity is provided with a drainage cavity outlet.

[0014] The centrifugal flow channel is communicated with the first drainage cavity, and the centrifugal flow channel is located between two adjacent permanent magnets.

[0015] When the permanent magnet speed regulator rotates, the cooling water in the first drainage cavity is ejected from the centrifugal flow channel under the action of centrifugal force, thereby cooling the permanent magnet and the conductor of the outer rotor of the permanent magnet speed regulator.

[0016] The cooling water in the centrifugal flow channel cools the side surfaces of the permanent magnets.

[0017] After the cooling water is ejected from the centrifugal flow channel, it cools the surface of the permanent magnet and the surface of the conductor.

[0018] Part of the cooling water in the second drainage chamber is ejected from the drainage chamber outlet under the action of centrifugal force, so that the cooling water flows out of the drainage chamber, and the other part of the cooling water remains in the second drainage chamber, thereby cooling the permanent magnet.

[0019] The cooling water remaining in the second drainage cavity cools the bottom of the permanent magnet.

[0020] The heat dissipation ribs are arranged on the surface of the conductor yoke.

[0021] The technical effect of the present invention is unquestionable. Compared with other water-cooled permanent magnet speed regulators, the present invention can achieve more precise cooling, improve cooling efficiency, and make more effective use of cooling water.

[0022] The present invention can directly cool the permanent magnet to prevent the temperature of the permanent magnet from rising to the demagnetization temperature, and can be applied to a speed regulator with a permanent magnet rotor as an inner rotor and a conductor rotor as an outer rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the internal rotor structure diagram of the permanent magnet speed regulator;

[0024] Figure 2 It is the coupling structure diagram of the outer rotor and inner rotor of the permanent magnet speed regulator;

[0025] In the figure: permanent magnet 1, first drainage cavity 2, second drainage cavity 3, centrifugal flow channel 4, drainage cavity outlet 5, conductor 6, conductor yoke 7, permanent magnet yoke 8, outer rotor 9, inner rotor 10. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and customary means in the art, which should all be included in the protection scope of the present invention.

[0027] Embodiment 1:

[0028] See also Figure 1 and Figure 2A cooling mechanism for a permanent magnet speed regulator includes a coolant tank, a coolant delivery pipeline, a plurality of first drainage chambers 2, a plurality of second drainage chambers 3, a centrifugal flow channel 4, and heat dissipation ribs for auxiliary heat dissipation.

[0029] The first drainage chamber 2, the second drainage chamber 3 and the centrifugal flow channel 4 are used to cool the rotor components of the permanent magnet speed regulator. The rotor components of the permanent magnet speed regulator include a permanent magnet speed regulator outer rotor 9 and a permanent magnet speed regulator inner rotor 10.

[0030] The permanent magnet speed regulator outer rotor 9 includes a conductor 6 and a conductor yoke 7 .

[0031] The permanent magnet speed regulator inner rotor 10 includes a permanent magnet 1 and a permanent magnet yoke 8 .

[0032] The permanent magnet 1 is fixed in the permanent magnet slot of the permanent magnet yoke 8 .

[0033] There is an air gap between the permanent magnet speed regulator outer rotor 9 and the permanent magnet speed regulator inner rotor 10.

[0034] The coolant box sprays cooling water to the first drainage cavity 2 and the second drainage cavity 3 respectively through the coolant delivery pipeline.

[0035] The first drainage chamber 2, the second drainage chamber 3 and the centrifugal flow channel 4 are all provided on the permanent magnet yoke 8 of the inner rotor 10 of the permanent magnet speed regulator.

[0036] The first drainage cavity 2 and the second drainage cavity 3 are arranged at intervals.

[0037] The second drainage cavity 3 is provided with a drainage cavity outlet 5 .

[0038] The centrifugal flow channel 4 is communicated with the first drainage cavity 2 , and the centrifugal flow channel 4 is located between two adjacent permanent magnets 1 .

[0039] When the permanent magnet speed regulator rotates, the cooling water in the first drainage cavity 2 is ejected from the centrifugal flow channel 4 under the action of centrifugal force, thereby cooling the permanent magnet 1 and the conductor 6 of the outer rotor 9 of the permanent magnet speed regulator.

[0040] The cooling water in the centrifugal flow channel 4 cools the side surfaces of the permanent magnet 1 .

[0041] After the cooling water is ejected from the centrifugal flow channel 4 , the surface of the permanent magnet 1 and the surface of the conductor 6 are cooled.

[0042] Under the action of centrifugal force, part of the cooling water in the second drainage chamber 3 is ejected from the drainage chamber outlet 5, so that the cooling water can flow out of the drainage chamber, so that the cooling water in the second drainage chamber can circulate, and the other part of the cooling water remains in the second drainage chamber 3, thereby cooling the permanent magnet 1.

[0043] The cooling water remaining in the second drainage cavity 3 cools the bottom of the permanent magnet 1 .

[0044] The heat dissipation ribs are arranged on the surface of the conductor yoke 7 .

[0045] Embodiment 2:

[0046] A cooling mechanism for a permanent magnet speed regulator comprises a cooling liquid box, a cooling liquid delivery pipeline, a plurality of first drainage chambers 2, a plurality of second drainage chambers 3, a centrifugal flow channel 4, and heat dissipation ribs for auxiliary heat dissipation.

[0047] Figure 1 It is a picture of the inner rotor 10 of the permanent magnet speed regulator. The first drainage chamber 2, the second drainage chamber 3, the centrifugal flow channel 4 and the drainage chamber outlet 5 are all present on the permanent magnet yoke, and the permanent magnet 1 is fixed in the permanent magnet slot of the permanent magnet yoke 8. The centrifugal flow channel 4 is connected to the first drainage chamber 2, and the second drainage chamber 3 is connected to the drainage chamber outlet 5.

[0048] Figure 2 This is a picture of the coupling of the outer rotor 9 and the inner rotor 10 of the permanent magnet speed regulator. There is an air gap between the outer rotor 9 and the inner rotor 10. The conductor 6 and the conductor yoke 7 are connected to form the outer rotor 9 of the permanent magnet speed regulator.

[0049] Working principle: cooling water can be directly sprayed into the first drainage chamber 2 and the second drainage chamber 3 from the pipe of the box. After the cooling water enters the first drainage chamber 2, since the first drainage chamber 2 does not have a drainage chamber outlet 5, the cooling water can only be sprayed out from the centrifugal flow channel 4 close to the outside under the action of centrifugal force during the rotation of the permanent magnet speed regulator. In this process, the side of the permanent magnet 1 can be cooled, and the cooling water can be sprayed on the surface of the permanent magnet 1 and the surface of the conductor 6 of the outer rotor 9 to cool the surface of the permanent magnet 1 and the surface of the conductor 6. After the cooling water enters the second drainage chamber 3, since the drainage chamber outlet 5 is small, there will be cooling water remaining in the second drainage chamber 3, and the cooling water will adhere to the side close to the permanent magnet 1 under the action of centrifugal force to cool the bottom of the permanent magnet 1. Therefore, the cooling water can cool the permanent magnet 1 in all directions, reduce the temperature of the permanent magnet 1, and can also cool the surface of the conductor 6. The heat dissipation ribs on the conductor yoke 7 can assist the cooling structure in heat dissipation.

Claims

1. A cooling mechanism for a permanent magnet speed regulator, characterized in that: It comprises a cooling liquid box, a cooling liquid delivery pipeline, a plurality of first drainage chambers (2), a plurality of second drainage chambers (3) and a centrifugal flow channel (4); The coolant box sprays cooling water to the first drainage cavity (2) and the second drainage cavity (3) respectively through the coolant delivery pipeline; The first drainage cavity (2), the second drainage cavity (3) and the centrifugal flow channel (4) are all provided on the permanent magnet yoke (8) of the inner rotor (10) of the permanent magnet speed regulator; The first drainage cavity (2) and the second drainage cavity (3) are arranged at intervals; The second drainage cavity (3) is provided with a drainage cavity outlet (5); The centrifugal flow channel (4) is in communication with the first drainage cavity (2); the centrifugal flow channel (4) is located between two adjacent permanent magnets (1); When the permanent magnet speed regulator rotates, the cooling water in the first drainage cavity (2) is ejected from the centrifugal flow channel (4) under the action of centrifugal force, thereby cooling the permanent magnet (1) and the conductor (6) of the permanent magnet speed regulator outer rotor (9); Under the action of centrifugal force, part of the cooling water in the second drainage chamber (3) is ejected from the drainage chamber outlet (5), thereby allowing the cooling water to flow out of the drainage chamber, and the other part of the cooling water remains in the second drainage chamber (3), thereby cooling the permanent magnet (1).

2. The cooling mechanism of a permanent magnet speed regulator according to claim 1, characterized in that: The first drainage chamber (2), the second drainage chamber (3) and the centrifugal flow channel (4) are used to cool the rotor components of the permanent magnet speed regulator; the rotor components of the permanent magnet speed regulator include a permanent magnet speed regulator outer rotor (9) and a permanent magnet speed regulator inner rotor (10); The permanent magnet speed regulator outer rotor (9) comprises a conductor (6) and a conductor yoke (7); The permanent magnet speed regulator inner rotor (10) comprises a permanent magnet (1) and a permanent magnet yoke (8); The permanent magnet (1) is fixed in the permanent magnet slot of the permanent magnet yoke (8).

3. The cooling mechanism of a permanent magnet speed regulator according to claim 2 is characterized in that: An air gap exists between the permanent magnet speed regulator outer rotor (9) and the permanent magnet speed regulator inner rotor (10).

4. The cooling mechanism of a permanent magnet speed regulator according to claim 2 is characterized in that: It also includes heat dissipation ribs for assisting heat dissipation; the heat dissipation ribs are arranged on the surface of the conductor yoke (7).

5. The cooling mechanism of a permanent magnet speed regulator according to claim 1, characterized in that: The cooling water in the centrifugal flow channel (4) cools the side surfaces of the permanent magnet (1); After the cooling water is sprayed out from the centrifugal flow channel (4), the surface of the permanent magnet (1) and the surface of the conductor (6) are cooled.

6. The cooling mechanism of a permanent magnet speed regulator according to claim 1, characterized in that: The cooling water remaining in the second drainage cavity (3) cools the bottom of the permanent magnet (1).

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