Cooling device for permanent magnet synchronous motor rotor welding

Abstract

The utility model relates to the technical field of permanent magnet synchronous motor rotor welding, in particular to a cooling device for permanent magnet synchronous motor rotor welding, which comprises a permanent magnet synchronous motor rotor, and the cooling device is arranged outside the permanent magnet synchronous motor rotor. According to the cooling jacket device, the defects in the prior art are overcome, the welding rotor can be rapidly cooled through the cooling jacket device, and as cooling water is completely sealed in the two cooling jackets, the cooling jackets can be extremely close to a welding surface and even can be flush with the welding surface or higher than the welding surface; the welding high temperature can be cooled from the welding surface of the rotor, so that a good cooling effect is achieved, and the magnetic steel performance of the rotor of the permanent magnet synchronous motor is protected from being damaged; no cooling water is splashed and atomized, the welding quality is improved, the external base frame can be attached to the cooling sleeve, heat on the cooling sleeve can be transferred to the cooling fins through heat conduction, and the cooling effect is achieved by means of airflow flowing through the cooling fins.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet synchronous motor rotor welding, in particular to a cooling device used for permanent magnet synchronous motor rotor welding. Background Art

[0002] The rotor of a permanent magnet synchronous motor refers to the part of the motor that can rotate freely when the motor is running. It is made of magnetic materials, such as neodymium iron boron, and no longer requires an additional DC excitation circuit. Permanent magnets usually use rare earth permanent magnets because rare earth permanent magnets have high magnetic energy product and high coercive force, which can generate a stronger magnetic field, thereby improving the efficiency and performance of the motor.

[0003] At present, in the processing of permanent magnet synchronous motor rotors, the welding process mostly adopts argon arc welding. Argon arc welding is a welding process. Its principle is to use the high temperature in the arc to melt the welding material and fill the gap between the welds to produce a welding effect. However, the high temperature generated during the argon arc welding process will be transmitted to the magnetic steel in the rotor. The high temperature will deteriorate the performance of the magnetic steel and even damage the magnetic steel, causing the rotor to be scrapped. Therefore, the rotor needs to be cooled during the welding process.

[0004] At present, a commonly used cooling method is to immerse part of the rotor in water to achieve a cooling effect. However, in this cooling method, if the water surface is too close to the rotor welding surface, the cooling effect is good, but the water may splash onto the welding position at high temperature, affecting the welding quality; if the water surface is slightly far away from the rotor welding surface, the possibility of water splashing onto the welding position at high temperature becomes smaller, but the cooling effect becomes worse, and there is a risk of damaging the magnetic steel. Therefore, a cooling device for permanent magnet synchronous motor rotor welding is proposed. Summary of the invention

[0005] In view of the deficiencies of the prior art, the utility model provides a cooling device for permanent magnet synchronous motor rotor welding, which overcomes the deficiencies of the prior art and solves the problems mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cooling device for welding a permanent magnet synchronous motor rotor, comprising a permanent magnet synchronous motor rotor, the permanent magnet synchronous motor rotor comprising a sleeve, a lower plug, an upper plug and a magnetic steel, the magnetic steel being arranged inside the sleeve, the upper plug and the lower plug being arranged at the upper and lower ends of the sleeve respectively, and a welding groove being formed at the connection between the upper plug, the lower plug and the sleeve, a cooling device being arranged outside the permanent magnet synchronous motor rotor, the cooling device being composed of two cooling jackets, the cooling jacket being a semi-cylindrical structure, threaded holes being arranged at the left and right ends of the cooling jacket, a medium flow channel being opened inside the cooling jacket, the medium flow channel being arranged in an S shape inside the cooling jacket, two adjacent cooling jackets being connected by means of screws through threaded holes, a water inlet water joint and a water outlet water joint being arranged at the two ends of the medium flow channel respectively, and an air cooling component being arranged on the side away from each other of the two cooling jackets.

[0007] Through two cooling jackets, the cooling jackets have built-in medium flow channels, the two cooling jackets are respectively provided with cooling water inlets and outlets, and the inlets and outlets are respectively equipped with water inlet water joints and water outlet water joints. The two cooling jackets are fixed by screws and tightly fit to the outer surface of the permanent magnet synchronous motor rotor to be welded, and the water joints of the inlet and outlet of the cooling jackets are respectively connected to the inlet and outlet of the cooling water machine. Through this cooling jacket device, rapid cooling of the welded rotor can be achieved. Because the cooling water is completely sealed in the two cooling jackets, the cooling jacket can be very close to the welding surface, and can even be flush with the welding surface or higher than the welding surface. It can achieve cooling of the welding high temperature from the rotor welding surface, achieve a good cooling effect, and protect the magnetic steel performance of the permanent magnet synchronous motor rotor from damage; because there is no splashing and atomization of cooling water, the welding quality is improved, and the additional air cooling component can drive the airflow for further cooling.

[0008] As a preferred technical solution of the utility model, a thermally conductive silicone pad is fixedly installed on the inner side of the cooling jacket, and the structural dimensions of the thermally conductive silicone pad and the cooling jacket are matched.

[0009] The contact gap between the permanent magnet synchronous motor rotor and the cooling jacket can be filled by the thermally conductive silicone pad, thereby increasing the heat dissipation contact area between the permanent magnet synchronous motor rotor and the cooling jacket and improving the heat dissipation and thermal conductivity efficiency.

[0010] As a preferred technical solution of the utility model, the air cooling component includes an external base frame, positioning bolts installed on the left and right ends of the external base frame, heat dissipation fins formed on the outside of the external base frame, and an air supply component arranged on the heat dissipation fins. A semicircular structure is formed on the side of the external base frame away from the heat dissipation fins, and the semicircular structure is adapted to the cooling jacket. Hanging ears are symmetrically installed on the external base frame.

[0011] The external base frame can fit with the cooling jacket, and can transfer the heat on the cooling jacket to the heat dissipation fins through heat conduction, and achieve the effect of heat dissipation and cooling with the help of the airflow flowing through the heat dissipation fins.

[0012] As an optimal technical solution of the utility model, the air supply assembly is composed of a frame and an air inlet fan. The frame is symmetrically provided with hanging rings, and the frame is clamped with hanging ears through the hanging rings. Silicone gaskets are fixedly installed at the diagonals of the front and rear surfaces of the frame.

[0013] The rotation of the intake fan can drive the air flow to the heat sink fins. The flowing air flow can contact the heat sink fins and take away the heat, thereby achieving the effect of cooling and heat dissipation. The silicone gasket can reduce the vibration caused by the rotation of the intake fan.

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

[0015] The cooling jacket device can realize rapid cooling of the welded rotor. Since the cooling water is completely sealed in the two cooling jackets, the cooling jacket can be very close to the welding surface, even flush with or higher than the welding surface, so that the welding high temperature can be cooled from the rotor welding surface, achieving a good cooling effect and protecting the magnetic steel performance of the permanent magnet synchronous motor rotor from damage. Since there is no splashing and atomization of cooling water, the welding quality is improved. The external base frame can fit with the cooling jacket, and the heat on the cooling jacket can be transferred to the cooling fins through heat conduction, and the airflow flowing through the cooling fins can achieve the effect of heat dissipation and cooling. The rotation of the inlet fan can drive the airflow to blow to the cooling fins, and the flowing airflow can contact the cooling fins and take away the heat, thereby achieving the effect of cooling and heat dissipation. The silicone gasket can reduce the vibration caused by the rotation of the inlet fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0017] Figure 2 It is a front view schematic diagram of the utility model;

[0018] Figure 3 For the utility model Figure 2 Schematic diagram of the cross section at AA;

[0019] Figure 4 This is a schematic diagram of the assembly of the external base frame of the utility model;

[0020] Figure 5 It is a partial cross-sectional schematic diagram of the cooling jacket of the utility model;

[0021] Figure 6 It is a schematic diagram of the frame assembly of the utility model.

[0022] In the figure: 1. permanent magnet synchronous motor rotor; 101. sheath; 102. lower plug; 103. upper plug; 104. magnet; 105. welding groove; 2. cooling jacket; 201. threaded hole; 202. medium flow channel; 203. water inlet joint; 204. water outlet joint; 3. thermal conductive silicone pad; 4. external base; 401. positioning bolt; 402. hanging ear; 403. heat dissipation fin; 5. frame; 501. inlet fan; 502. silicone gasket; 503. hanging ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-6A cooling device for permanent magnet synchronous motor rotor welding, comprising a permanent magnet synchronous motor rotor 1, the permanent magnet synchronous motor rotor 1 comprising a sleeve 101, a lower plug 102, an upper plug 103 and a magnetic steel 104, the magnetic steel 104 is arranged inside the sleeve 101, the upper plug 103 and the lower plug 102 are respectively arranged at the upper and lower ends of the sleeve 101, and a welding groove 105 is formed at the connection between the upper plug 103, the lower plug 102 and the sleeve 101, the outer A cooling device is installed, which consists of two cooling jackets 2. The cooling jacket 2 is a semi-cylindrical structure. Both ends of the cooling jacket 2 are provided with threaded holes 201. A medium flow channel 202 is opened inside the cooling jacket 2. The medium flow channel 202 is arranged in an S shape inside the cooling jacket 2. Two adjacent cooling jackets 2 are connected through the threaded holes 201 by means of screws. Both ends of the medium flow channel 202 are respectively provided with a water inlet water joint 203 and a water outlet water joint 204. The sleeves 2 are each provided with an air cooling component on one side away from each other. Through the two cooling sleeves 2, the cooling sleeves 2 have a built-in medium flow channel 202. The two cooling sleeves 2 are respectively provided with an inlet and outlet of cooling water, and the inlet and outlet are respectively provided with an inlet water joint 203 and an outlet water joint 204. The two cooling sleeves 2 are fixed by screws and tightly fit to the outer surface of the permanent magnet synchronous motor rotor 1 to be welded, and the inlet and outlet water joints of the cooling sleeve 2 are respectively connected to the inlet and outlet of the cooling water machine. Through this cooling sleeve 2 device, rapid cooling of the welded rotor can be achieved. Because the cooling water is completely sealed in the two cooling sleeves 2, the cooling sleeve 2 can be very close to the welding surface, and can even be flush with the welding surface or higher than the welding surface. The high welding temperature can be cooled from the rotor welding surface, achieving a good cooling effect, and protecting the performance of the magnetic steel 104 of the permanent magnet synchronous motor rotor 1 from damage; because there is no splashing and atomization of cooling water, the welding quality is improved, and the additional air cooling component can drive the airflow for further cooling.

[0025] Specifically, a thermally conductive silicone pad 3 is fixedly installed on the inner side of the cooling jacket 2. The structural dimensions of the thermally conductive silicone pad 3 and the cooling jacket 2 are adapted to each other. The thermally conductive silicone pad 3 can fill the contact gap between the permanent magnet synchronous motor rotor 1 and the cooling jacket 2, thereby increasing the heat dissipation contact area between the permanent magnet synchronous motor rotor 1 and the cooling jacket 2 and improving the heat dissipation and thermal conductivity efficiency.

[0026] Specifically, the air cooling component includes an external base frame 4, positioning bolts 401 installed on the left and right ends of the external base frame 4, heat dissipation fins 403 formed on the outside of the external base frame 4, and an air supply component arranged on the heat dissipation fins 403. A semicircular structure is formed on the side of the external base frame 4 away from the heat dissipation fins 403, and the semicircular structure is adapted to the cooling jacket 2. Ears 402 are symmetrically installed on the external base frame 4, and the external base frame 4 can fit with the cooling jacket 2, and can transfer the heat on the cooling jacket 2 to the heat dissipation fins 403 through heat conduction, and achieve the effect of heat dissipation and cooling with the help of the airflow flowing through the heat dissipation fins 403.

[0027] Specifically, the air supply component is composed of a frame 5 and an inlet fan 501. Hanging rings 503 are symmetrically installed on the frame 5. The frame 5 is clamped with the hanging ears 402 through the hanging rings 503. Silicone gaskets 502 are fixedly installed at the diagonals of the front and back sides of the frame 5. The rotation of the inlet fan 501 can drive the airflow to blow to the heat dissipation fins 403. The flowing airflow can contact the heat dissipation fins 403 and take away heat, thereby achieving the effect of cooling and heat dissipation. The silicone gasket 502 can reduce the vibration generated by the rotation of the inlet fan 501.

[0028] Working principle: Two cooling jackets 2 are fixed and tightly fitted to the outer surface of the permanent magnet synchronous motor rotor 1 to be welded by screws passing through the threaded holes 201. Through the two cooling jackets 2, the cooling jackets 2 have built-in medium flow channels 202. The two cooling jackets 2 are respectively provided with inlets and outlets for cooling water. The inlets and outlets are respectively provided with inlet water joints 203 and outlet water joints 204. The two cooling jackets 2 are fixed and tightly fitted to the outer surface of the permanent magnet synchronous motor rotor 1 to be welded by screws. The permanent magnet synchronous motor rotor 1 is composed of a jacket 101, a lower plug 102, an upper plug 103, and a magnetic steel 104. The welding groove 105 is the welding position of the permanent magnet synchronous motor rotor 1. The high temperature generated by the permanent magnet synchronous motor rotor 1 during argon arc welding will be transmitted to the magnetic steel 104 through the upper plug 103, and the high temperature will damage the performance of the magnetic steel 104. The water joints at the inlet and outlet of the cooling jacket 2 are respectively connected to the inlet and outlet of the cooling water machine. This cooling sleeve 2 device can achieve rapid cooling of the welded rotor. Since the cooling water is completely sealed in the two cooling sleeves 2, the cooling sleeve 2 can be very close to the welding surface, or even flush with or higher than the welding surface, so that the welding high temperature can be cooled from the rotor welding surface, achieving a good cooling effect and protecting the magnetic steel 104 of the permanent magnet synchronous motor rotor 1 from damage. Since there is no splashing and atomization of cooling water, the welding quality is improved. The external base frame 4 can fit with the cooling sleeve 2 and transfer the heat on the cooling sleeve 2 to the heat dissipation fins 403 through heat conduction, and achieve the effect of heat dissipation and cooling with the help of the airflow flowing through the heat dissipation fins 403. The rotation of the air inlet fan 501 can drive the airflow to blow to the heat dissipation fins 403, and the flowing airflow can contact the heat dissipation fins 403 and take away the heat, thereby achieving the effect of cooling and heat dissipation. The silicone gasket 502 can reduce the vibration caused by the rotation of the air inlet fan 501.

[0029] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cooling device for permanent magnet synchronous motor rotor welding, comprising a permanent magnet synchronous motor rotor (1), characterized in that: A cooling device is installed on the outside of the permanent magnet synchronous motor rotor (1), the cooling device comprising two cooling jackets (2), the cooling jacket (2) being a semi-cylindrical structure, threaded holes (201) being provided at both left and right ends of the cooling jacket (2), a medium flow channel (202) being provided inside the cooling jacket (2), a water inlet water joint (203) and a water outlet water joint (204) being installed at both ends of the medium flow channel (202), and an air cooling component being installed on the sides of the two cooling jackets (2) away from each other.

2. The cooling device for permanent magnet synchronous motor rotor welding according to claim 1, characterized in that: The permanent magnet synchronous motor rotor (1) comprises a sleeve (101), a lower plug (102), an upper plug (103) and a magnetic steel (104).

3. The cooling device for permanent magnet synchronous motor rotor welding according to claim 2 is characterized in that: The magnetic steel (104) is arranged inside the sheath (101), the upper plug (103) and the lower plug (102) are arranged at the upper and lower ends of the sheath (101), respectively, and a welding groove (105) is formed at the connection between the upper plug (103), the lower plug (102) and the sheath (101).

4. The cooling device for permanent magnet synchronous motor rotor welding according to claim 1, characterized in that: A heat-conducting silicone pad (3) is fixedly mounted on the inner side of the cooling jacket (2), and the heat-conducting silicone pad (3) and the cooling jacket (2) have matching structural dimensions.

5. The cooling device for permanent magnet synchronous motor rotor welding according to claim 1, characterized in that: The medium flow channels (202) are arranged in an S shape inside the cooling jacket (2), and two adjacent cooling jackets (2) are connected via threaded holes (201) by means of screws.

6. The cooling device for permanent magnet synchronous motor rotor welding according to claim 1, characterized in that: The air cooling component comprises an external base frame (4), positioning bolts (401) arranged and installed at the left and right ends of the external base frame (4), heat dissipation fins (403) formed on the outside of the external base frame (4), and an air supply component arranged on the heat dissipation fins (403).

7. A cooling device for permanent magnet synchronous motor rotor welding according to claim 6, characterized in that: A semicircular structure is formed on the side of the external base frame (4) away from the heat dissipation fins (403), and the semicircular structure is compatible with the cooling jacket (2).

8. The cooling device for permanent magnet synchronous motor rotor welding according to claim 6, characterized in that: The external base frame (4) is symmetrically mounted with hanging ears (402).

9. The cooling device for permanent magnet synchronous motor rotor welding according to claim 6, characterized in that: The air supply assembly is composed of a frame (5) and an air inlet fan (501); hanging rings (503) are symmetrically mounted on the frame (5); and the frame (5) is snap-connected to the hanging ears (402) via the hanging rings (503).

10. A cooling device for permanent magnet synchronous motor rotor welding according to claim 9, characterized in that: Silicone gaskets (502) are fixedly mounted at the diagonal positions of the front and rear surfaces of the frame (5).

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