Rotor structure of alternating current motor

Abstract

The utility model belongs to the technical field of alternating-current motors, and particularly relates to a rotor structure of an alternating-current motor, which comprises a rotor body and a rotating shaft, the rotating shaft is rotatably connected onto the rotor body, and a dismounting device is arranged in the rotor body. According to the rotor structure of the alternating-current motor, the stator body and the rotor body are connected and fixed by screwing the fixing bolts into the bolt holes in the rotor body and the stator body, the stator body is prevented from shaking when rotating along with the rotor body, the end cover is fixed to the left side of the rotor body through the sealing bolts, and the sealing effect is good. Therefore, the stator body is fixed inside the installation cavity inside the rotor body, the permanent magnet columns are installed inside the installation bins, the embedded permanent magnet columns are arranged in a mode that opposite poles on adjacent sides are homopolar, a strong magnetic area is formed between the homopolar poles, starting is easier, falling of the permanent magnet columns is avoided, the permanent magnet columns can bear strong centrifugal force, and the permanent magnet columns are more suitable for high-speed rotation.

Description

Technical Field

[0001] The utility model relates to the technical field of AC motors, in particular to a rotor structure of an AC motor. Background Art

[0002] An AC motor is a machine that converts the electrical energy of AC power into mechanical energy. In the prior art, in order to reduce the axial diameter of the motor, the stator is installed inside the rotor. However, the rotor in the prior art simply has a cavity opened inside it, and the stator is also simply installed inside the cavity, and the position of the stator cannot be fixed, so that the stator is easy to shake during rotation.

[0003] For example, Chinese patent announcement No. CN213367502U discloses a rotor of an AC motor. When in use, it is necessary to first install the rotor body inside the limiting groove, and pass the second rotating shaft through the second shaft sleeve, and then install the stator inside the cavity, and pass the fixing bolt through the through hole, and then insert one end of the fixing bolt into the threaded hole and tighten the fixing bolt to fix the fixing plate inside the cavity so that the fixing plate can be located on both sides of the stator, and then tighten the fixing bolt so that the magnetic steel can be adsorbed on both sides of the stator, so that the position of the stator can be fixed by using the fixing bolt, the fixing plate and the magnetic steel, and then the stator can be fixed. The stator is fixed inside the cavity, and the fixing bolts, the fixing plate and the magnetic steel can prevent the stator from shaking during the rotation of the rotor body, thereby effectively improving the stability of the stator. The end cover can then be placed at the bottom of the shell, and the first rotating shaft at the bottom of the rotor body can pass through the first shaft sleeve. At the same time, the bottom end of the shell needs to be inserted into the slot, and then the end cover is rotated, so that the end cover can be used to drive the annular plate to rotate. Moreover, since the annular plate is connected to the shell by threads, the end cover will tightly fix the annular plate and the shell together during rotation, thereby fixing the end cover to the bottom of the rotor body.

[0004] However, the rotor of the AC motor in the above application has the stator installed inside the rotor body. When the stator is damaged, it is not convenient to disassemble, repair or replace the stator. Therefore, there are certain limitations.

[0005] For this reason, we urgently need to provide a rotor structure of an AC motor. Utility Model Content

[0006] The utility model aims to provide a rotor structure of an AC motor to solve the problem that the rotor of the AC motor proposed in the above background technology has a stator installed inside a rotor body, and when the stator is damaged, it is inconvenient to disassemble, repair and replace the stator.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a rotor structure of an AC motor, comprising a rotor body and a rotating shaft, wherein the rotating shaft is rotatably connected to the rotor body, and a disassembly and assembly device is arranged inside the rotor body.

[0008] The disassembly and assembly device includes a stator body, fixing bolts, an end cover, and sealing bolts. The stator body is installed inside the rotor body. Two groups of fixing bolts are installed in pairs at the left and right ends of the upper and lower surfaces of the rotor body respectively. The end cover is installed on the left side of the rotor body. Four sealing bolts are connected to the outer surface of the end cover in the form of annular threads.

[0009] A further improvement is that a mounting cavity is opened on the left side of the rotor body, and the stator body is mounted inside the mounting cavity.

[0010] A further improvement is that bolt holes are respectively opened on the left and right sides of the upper and lower outer surfaces of the rotor body, and bolt holes are also opened on the left and right sides of the upper and lower outer surfaces of the stator body. The fixing bolts are threadedly connected to the inside of the bolt holes, and the fixing bolts are screwed into the inside of the bolt holes on the rotor body and the stator body, so that the stator body and the rotor body are connected and fixed, thereby preventing the stator body from shaking when the rotor body rotates.

[0011] A further improvement is that a threaded hole is provided in an annular shape on the left outer surface of the end cover, and a threaded hole is also provided on the left outer surface of the rotor body. The sealing bolt is threadedly connected to the inside of the threaded hole, and the end cover is fixed to the left side of the rotor body by the sealing bolt, thereby fixing the stator body inside the mounting cavity inside the rotor body. When the stator body needs to be removed for maintenance or replacement, the fixing bolt is removed in the reverse direction, and the fixing bolt is screwed out after the end cover is taken out.

[0012] A further improvement is that an end cover is also installed on the right outer surface of the rotor body, and the end cover is made of brass. The brass end cover has a certain thermal conductivity, so as to better dissipate and cool the heat generated by the rotation of the rotor body.

[0013] A further improvement is that the outer surface of the rotor body is provided with six mounting chambers in a ring shape, and permanent magnet columns are installed inside the mounting chambers. The permanent magnet columns are installed inside the mounting chambers, and the embedded permanent magnet columns are arranged so that the relative poles on adjacent sides are of the same pole, so that a strong magnetic area is formed between the same poles, which makes it easier to start and prevent it from falling off, can withstand strong centrifugal force, and is more suitable for high-speed rotation.

[0014] A further improvement is that the rotor body is made of magnetic material. By combining the permanent magnet column with the magnetic rotor body, there is no need for the motor stator coil to provide the rotor body with a large amount of reactive power required to form a magnetic field. Therefore, the power factor is higher during operation and the energy saving efficiency is higher.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The rotor structure of the AC motor is connected and fixed to the rotor body by screwing fixing bolts into the bolt holes on the rotor body and the stator body, thereby preventing the stator body from shaking when the rotor body rotates.

[0017] 2. The rotor structure of the AC motor fixes the end cover to the left side of the rotor body through the sealing bolt, thereby fixing the stator body inside the mounting cavity inside the rotor body. When the stator body needs to be removed for maintenance or replacement, the fixing bolts are removed in the reverse direction, the end cover is taken out, and then the fixing bolts are screwed out.

[0018] 3. The rotor structure of the AC motor installs the permanent magnet column inside the installation bin. The embedded permanent magnet columns are arranged so that the relative poles on adjacent sides are of the same pole, so that a strong magnetic area is formed between the same poles, which makes it easier to start and prevent it from falling off. It can withstand strong centrifugal force and is more suitable for high-speed rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view structural schematic diagram of the utility model;

[0020] Figure 2 It is a side view structural schematic diagram of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the utility model when viewed from above;

[0022] Figure 4 It is a schematic diagram of the explosion structure of the utility model.

[0023] In the figure: 1, rotor body; 2, rotating shaft; 301, stator body; 302, fixing bolts; 303, end cover; 304, sealing bolts; 305, installation cavity; 306, installation compartment; 307, permanent magnet column. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-Figure 4 , the utility model provides a technical solution:

[0026] A rotor structure of an AC motor comprises a rotor body 1 and a rotating shaft 2. The rotating shaft 2 is rotatably connected to the rotor body 1. A disassembly and assembly device is arranged inside the rotor body 1.

[0027] The disassembly and assembly device includes a stator body 301, fixing bolts 302, an end cover 303, and sealing bolts 304. The stator body 301 is installed inside the rotor body 1. Two groups of fixing bolts 302 are installed in pairs at the left and right ends of the upper and lower surfaces of the rotor body 1 respectively. The end cover 303 is installed on the left side of the rotor body 1. Four sealing bolts 304 are connected to the outer surface of the end cover 303 in an annular thread. An installation cavity 305 is opened on the left side of the rotor body 1, and the stator body 301 is installed inside the installation cavity 305.

[0028] Bolt holes are respectively provided on the left and right sides of the upper and lower outer surfaces of the rotor body 1, and bolt holes are also provided on the left and right sides of the upper and lower outer surfaces of the stator body 301. The fixing bolts 302 are threadedly connected to the inside of the bolt holes. The fixing bolts 302 are screwed into the inside of the bolt holes on the rotor body 1 and the stator body 301, so that the stator body 301 is connected and fixed to the rotor body 1 to prevent the stator body 301 from shaking when the rotor body 1 rotates.

[0029] A threaded hole is formed in an annular shape on the left outer surface of the end cover 303, and a threaded hole is also formed on the left outer surface of the rotor body 1. The sealing bolt 304 is threadedly connected to the inside of the threaded hole. The end cover 303 is fixed to the left side of the rotor body 1 by the sealing bolt 304, so that the stator body 301 is fixed to the inside of the installation cavity 305 inside the rotor body 1. When the stator body 301 needs to be removed for maintenance or replacement, the sealing bolt 304 is removed in the reverse direction, and the end cover 303 is taken out and then the fixing bolt 302 is screwed out.

[0030] An end cover 303 is also installed on the right outer surface of the rotor body 1, and the end cover 303 is made of brass. The brass end cover 303 has a certain thermal conductivity, so as to better dissipate and cool the heat generated by the rotation of the rotor body 1.

[0031] The outer surface of the rotor body 1 is annularly provided with six mounting chambers 306, and permanent magnet columns 307 are installed inside the mounting chambers 306. The permanent magnet columns 307 are installed inside the mounting chambers 306, and the embedded permanent magnet columns 307 are arranged so that the relative poles on the adjacent sides are of the same pole, so that a strong magnetic area is formed between the same poles, which makes it easier to start and prevents it from falling off. It can withstand strong centrifugal force and is more suitable for high-speed rotation.

[0032] The rotor body 1 is made of magnetic material. By using the permanent magnet column 307 in combination with the magnetic rotor body 1, there is no need for the motor stator coil to provide the rotor body 1 with a large amount of reactive power required to form a magnetic field. Therefore, the power factor is higher during operation and the energy saving efficiency is higher.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A rotor structure of an AC motor, comprising a rotor body (1) and a rotating shaft (2), wherein the rotating shaft (2) is rotatably connected to the rotor body (1), and is characterized in that: A disassembly and assembly device is provided inside the rotor body (1); The disassembly and assembly device comprises a stator body (301), fixing bolts (302), an end cover (303), and sealing bolts (304); the stator body (301) is mounted inside the rotor body (1); two groups of fixing bolts (302) are respectively mounted on the left and right ends of the upper and lower surfaces of the rotor body (1); the end cover (303) is mounted on the left side of the rotor body (1); and four sealing bolts (304) are connected to the outer surface of the end cover (303) in the form of annular threads.

2. The rotor structure of an AC motor according to claim 1, characterized in that: The left side of the rotor body (1) is provided with an installation cavity (305), and the stator body (301) is installed inside the installation cavity (305).

3. The rotor structure of an AC motor according to claim 1, characterized in that: Bolt holes are respectively provided on the left and right sides of the upper and lower outer surfaces of the rotor body (1), and bolt holes are also provided on the left and right sides of the upper and lower outer surfaces of the stator body (301), and the fixing bolts (302) are threadedly connected to the inside of the bolt holes.

4. The rotor structure of an AC motor according to claim 1, characterized in that: The left outer surface of the end cover (303) is provided with a threaded hole in an annular shape, and the left outer surface of the rotor body (1) is also provided with a threaded hole, and the sealing bolt (304) is threadedly connected to the inside of the threaded hole.

5. The rotor structure of an AC motor according to claim 4, characterized in that: An end cover (303) is also installed on the right outer surface of the rotor body (1), and the end cover (303) is made of brass.

6. The rotor structure of an AC motor according to claim 1, characterized in that: The outer surface of the rotor body (1) is provided with six installation chambers (306) in an annular shape, and permanent magnet columns (307) are installed inside the installation chambers (306).

7. The rotor structure of an AC motor according to claim 6, characterized in that: The rotor body (1) is made of magnetic material.

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