A permanent magnet motor stator and rotor assembly device and method

Abstract

The present invention provides a permanent magnet motor stator and rotor assembly device, including a generator support and guide tooling, a guide shaft, a long guide rod, a gap pad, a short guide rod, a stator assembly base, a main bearing assembly, a main bearing support, a rotor assembly and a stator assembly. The present invention solves the risk of adsorption when the stator and rotor are assembled and the problem of eccentricity when the stator and rotor are assembled, and ensures the concentricity of the stator and rotor and the stator and rotor air gap.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet motor stator and rotor assembly, in particular to a permanent magnet motor stator and rotor assembly device and method, and specifically to a large inner rotor permanent magnet motor stator and rotor assembly device and method. Background Art

[0002] Permanent magnets are installed on the rotor of a large permanent magnet motor. There is a risk of adsorption when the stator and rotor are assembled. Due to the magnetic force of the permanent magnet, the stator and rotor will be eccentric when assembled, and the stator and rotor concentricity and stator and rotor air gap cannot be guaranteed. In order to ensure the smooth assembly of the stator and rotor of the permanent magnet motor, a permanent magnet motor stator and rotor assembly device and method are specially invented. Summary of the invention

[0003] In order to solve the above problems, the present invention discloses a permanent magnet motor stator and rotor assembly device and method.

[0004] The specific plan is as follows:

[0005] A permanent magnet motor stator and rotor assembly device, characterized in that it includes a generator support and guide tooling, a guide sleeve, a long guide rod, a gap pad, a short guide rod, a stator assembly base, a main bearing assembly, a main bearing support, a rotor assembly and a stator assembly; the generator support and guide tooling is welded by a support plate, a first rib plate, a bottom plate and a guide shaft, the support plate is a horizontally arranged circular plate-shaped structure, and a plurality of through holes are processed along the edge of its top surface, the stator assembly base and the main bearing support are connected and fixed on the support plate, the guide shaft is composed of a guide cylinder, a first connecting flange and a reinforcement ring, and the guide cylinder is vertically arranged on the support plate The middle of the top surface is concentric with the outer circle of the support plate; the main bearing assembly is installed on the rotor assembly, and a guide sleeve is installed on the main bearing assembly, the guide sleeve is composed of a guide cylinder, a second rib plate and a second connecting flange, wherein the second connecting flange is arranged outside the upper end of the guide cylinder, and the second connecting flange is processed with a through hole and a countersunk hole that are fixed with the main bearing assembly, and the guide sleeve and the front end of the guide cylinder are conical; the long guide rod and the short guide rod are arranged on the main bearing assembly, and the main bearing support is provided with support holes with the same number and corresponding positions as the guide rods; the gap gasket is L-shaped and arranged between the rotor assembly and the stator assembly.

[0006] As a further improvement of the present invention, a rotor lifting lug is provided outside the upper portion of the main bearing support.

[0007] As a further improvement of the present invention, the long guide rod and the short guide rod are both carbon steel guide rods, one end of which is provided with a thread and the other end is conical.

[0008] As a further improvement of the present invention, the gap gasket is a non-magnetic gap gasket.

[0009] A method for assembling a permanent magnet motor stator and rotor, using a permanent magnet motor stator and rotor assembly device as claimed in any one of claims 1 to 4, specifically comprising the following steps:

[0010] 1) The main bearing support and the stator assembly base are first connected and fixed, then placed on the generator support and guide fixture, and then fixed with bolts. The outer circle of the generator support and guide fixture must fall into the countersunk hole on the flange surface of the stator assembly base to ensure that the radial clearance between the generator support and guide fixture and the stator assembly base flange hole is ≤0.1mm;

[0011] 2) After the main bearing assembly is installed on the flange surface of the rotor assembly, the guide sleeve is installed on the flange surface of the main bearing assembly. The guide sleeve and the main bearing assembly are matched through the stopper to ensure the coaxiality of the guide sleeve and the center of the main bearing assembly. At the same time, several long guide rods and several short guide rods are installed on the main bearing assembly to guide the main bearing assembly into the main bearing support stopper. The clearance between the outer diameter of the guide rod and the main bearing support hole is less than 0.1mm;

[0012] 3) Use the overhead crane to connect the rotor lifting lugs to lift the rotor assembly to the top of the stator assembly. The crane slowly descends to guide the guide shaft into the guide sleeve. At the same time, adjust the position of the stator and rotor, and guide the guide rod into the main bearing support flange hole;

[0013] 4) The crane descends slowly. Before the stator assembly core contacts the rotor poles, several non-magnetic gap gaskets need to be placed in the stator-rotor gap.

[0014] 5) The crane slowly descends, and the main bearing assembly falls into the stop of the main bearing support. Finally, the main bearing assembly and the main bearing support are fixed with bolts.

[0015] The beneficial effects of the present invention are: solving the risk of adsorption when the stator and rotor are assembled and the problem of eccentricity when the stator and rotor are assembled, and ensuring the concentricity of the stator and rotor and the air gap between the stator and rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of the generator support and guide fixture and the alignment fixture in the present invention.

[0018] Figure 3 for Figure 2 Top view of the .

[0019] Figure 4 It is a schematic diagram of the guide shaft in the present invention.

[0020] Figure 5 for Figure 4 Sectional view of AA.

[0021] Figure 6 Schematic diagram of the gap gasket in the present invention.

[0022] Figure 7 for Figure 6 Left view of .

[0023] Figure 8 Schematic diagram of the guide rod in the present invention.

[0024] List of reference numerals:

[0025] 1- Generator support and guide tooling, 2- Guide sleeve, 3- Long guide rod, 4- Gap pad, 5- Short guide rod, 6- Stator assembly base, 7- Main bearing assembly, 8- Main bearing support, 9- Rotor lifting ear, 10- Stator assembly. DETAILED DESCRIPTION

[0026] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0027] As shown in the figure, a permanent magnet motor stator and rotor assembly device includes a generator support and guide tooling 1, a guide sleeve 2, a long guide rod 3, a gap pad 4, a short guide rod 5, a stator assembly base 6, a main bearing assembly 7, a main bearing support 8, a rotor assembly and a stator assembly 10; the guide cylinder, rib plate and second connecting flange generator support and guide tooling 1 are welded by a support plate, a first rib plate, a bottom plate and a guide shaft, the guide cylinder, rib plate and second connecting flange support plate are horizontally arranged circular plate-shaped structures, and a plurality of through holes are processed along the edge of the top surface thereof, the guide cylinder, rib plate and second connecting flange stator assembly base 6 and the main bearing support 8 are connected and fixed on the support plate, the guide cylinder, rib plate and second connecting flange guide shaft are composed of a guide cylinder, a first connecting flange and a reinforcement ring, the guide cylinder, rib plate and second connecting flange guide cylinder are vertically arranged in the middle of the top surface of the support plate, and Concentric with the outer circle of the support plate; the guide cylinder, rib plate and second connecting flange main bearing assembly 7 are installed on the rotor assembly, and a guide sleeve is installed on the main bearing assembly 7. The guide cylinder, rib plate and second connecting flange guide sleeve 2 are composed of a guide cylinder, a second rib plate and a second connecting flange, wherein the second connecting flange is arranged outside the upper end of the guide cylinder, and the second connecting flange is processed with a through hole and a countersunk hole that cooperates with the main bearing assembly 7 and is fixed. The guide cylinder, rib plate and second connecting flange guide sleeve 2 and the front end of the guide cylinder are conical; the long guide rod 3 and the short guide rod 5 of the guide cylinder, rib plate and second connecting flange are arranged on the main bearing assembly 7, and the guide cylinder, rib plate and second connecting flange main bearing support 8 are provided with support holes with the same number and corresponding positions as the guide rods; the guide cylinder, rib plate and second connecting flange gap gasket 4 are L-shaped and arranged between the rotor assembly and the stator assembly 10.

[0028] In this embodiment, a rotor lifting lug 9 is provided on the upper portion of the main bearing support 8 .

[0029] In this embodiment, the long guide rod 3 and the short guide rod 5 are both carbon steel guide rods, one end of which is provided with a thread and the other end is tapered.

[0030] In this embodiment, the gap gasket 4 is a non-magnetic gap gasket.

[0031] A method for assembling a permanent magnet motor stator and rotor, specifically comprising the following steps:

[0032] 1) The main bearing support 8 and the stator assembly base 6 are first connected and fixed, and then placed on the generator support and guide fixture 1, and then fixed by bolts. The outer circle of the generator support and guide fixture 1 must fall into the countersunk hole on the flange surface of the stator assembly base 6 to ensure that the radial clearance between the generator support and guide fixture 1 and the flange hole of the stator assembly base 6 is ≤0.1mm;

[0033] 2) After the main bearing assembly 7 is installed on the flange surface of the rotor assembly, the guide sleeve is installed on the flange surface of the main bearing assembly 7. The guide sleeve and the main bearing assembly 7 are matched through the stopper to ensure the coaxiality of the guide sleeve and the center of the main bearing assembly 7. At the same time, a number of long guide rods 3 and a number of short guide rods 5 are installed on the main bearing assembly 7 to guide the main bearing assembly 7 into the stopper of the main bearing support 8. The clearance between the outer diameter of the guide rod and the main bearing support hole is less than 0.1mm;

[0034] 3) Use the overhead crane to connect the rotor lifting lug 9 to lift the rotor assembly to the top of the stator assembly. The crane slowly descends to guide the guide shaft into the guide sleeve 2. At the same time, adjust the position of the stator and rotor, and guide the guide rod into the main bearing support flange hole;

[0035] 4) The crane descends slowly. Before the stator assembly core contacts the rotor poles, several non-magnetic gap spacers 4 need to be placed in the stator-rotor gap.

[0036] 5) The crane slowly descends, and the main bearing assembly 7 falls into the stopper of the main bearing support 8. Finally, the main bearing assembly 7 and the main bearing support 8 are fixed with bolts.

[0037] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A method for assembling a stator and a rotor of a permanent magnet motor, characterized in that: A permanent magnet motor stator and rotor assembly device is used, the device comprising a generator support and guide tooling (1), a guide sleeve (2), a long guide rod (3), a gap pad (4), a short guide rod (5), a stator assembly base (6), a main bearing assembly (7), a main bearing support (8), a rotor assembly and a stator assembly (10); the generator support and guide tooling (1) is formed by welding a support plate and a guide shaft, the support plate is a horizontally arranged circular plate-shaped structure, and a plurality of through holes are processed along the edge of the top surface of the support plate; the stator assembly base (6) and the main bearing support (8) are connected and fixed on the support plate; the guide shaft is formed by a guide cylinder, and the guide cylinder is vertically arranged in the middle of the top surface of the support plate and is concentric with the outer circle of the support plate; the main bearing assembly (7) is mounted on the rotor assembly, and the main bearing assembly (7) is mounted with a guide sleeve (2). The guide sleeve (2) is composed of a guide cylinder and a second connecting flange, wherein the second connecting flange is sleeved on the outer side of the upper end of the guide cylinder, and a through hole and a countersunk hole are processed on the second connecting flange to cooperate with the main bearing assembly (7), and the guide sleeve (2) and the front end of the guide cylinder are conical; the long guide rod (3) and the short guide rod (5) are arranged on the main bearing assembly (7), and the main bearing support (8) is provided with support holes with the same number and corresponding positions as the guide rods; the gap gasket (4) is L-shaped and arranged between the rotor assembly and the stator assembly (10); a rotor hanging ear (9) is provided on the outer side of the upper part of the main bearing support (8); the long guide rod (3) and the short guide rod (5) are both carbon steel guide rods, one end of which is provided with a thread and the other end is conical; the gap gasket (4) is a non-magnetic gap gasket; the method specifically comprises the following steps: 1) The main bearing support (8) and the stator assembly base (6) are first connected and fixed, and then placed on the generator support and guide fixture (1), and then fixed with bolts. The outer circle of the generator support and guide fixture (1) must fall into the countersunk hole on the flange surface of the stator assembly base (6), ensuring that the radial clearance between the generator support and guide fixture (1) and the stator assembly base (6) flange hole is ≤0.1mm; 2) After the main bearing assembly (7) is mounted on the flange surface of the rotor assembly, the guide sleeve (2) is mounted on the flange surface of the main bearing assembly (7). The guide sleeve (2) and the main bearing assembly (7) are matched through the stopper to ensure the coaxiality of the guide sleeve (2) and the center of the main bearing assembly (7). At the same time, a plurality of long guide rods (3) and a plurality of short guide rods (5) are mounted on the main bearing assembly (7) to guide the main bearing assembly (7) into the stopper of the main bearing support (8). The clearance between the outer diameter of the guide rod and the main bearing support hole is less than 0.1 mm. 3) Use the overhead crane to connect the rotor lifting lug (9) to lift the rotor assembly to the top of the stator assembly. The crane slowly descends to guide the guide shaft into the guide sleeve (2). At the same time, adjust the position of the stator and rotor and guide the guide rod into the main bearing support flange hole. 4) The crane is slowly lowered. Before the stator assembly core contacts the rotor magnetic poles, several non-magnetic gap spacers (4) need to be placed in the stator-rotor gap. 5) The crane is lowered slowly, and the main bearing assembly (7) is dropped into the stopper of the main bearing support (8). Finally, the main bearing assembly (7) and the main bearing support (8) are fixed with bolts.

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