Core-pulling hoisting equipment for permanent magnet transformation of asynchronous motor rotor

Abstract

The permanent magnet transformation core-pulling hoisting equipment is characterized by comprising an electromagnetic attraction platform 1, a rotor shaft fixing ring 2, a vertical expansion joint 3, a vertical expansion joint knob 4 and a hoisting ring 5, the electromagnetic attraction platform 1 is composed of a controller, an electromagnet driving circuit, an upper pressure sensor, a lower pressure sensor, an electromagnet magnetic field Hall sensor, a rotor magnetic field Hall sensor and a plurality of sets of electromagnets. And the controller calculates the stress condition of the rotor of the permanent magnet motor according to the upper pressure sensor, the lower pressure sensor, the electromagnet magnetic field Hall sensor and the rotor magnetic field Hall sensor, and controls the current value of each group of electromagnets by giving an instruction to the electromagnet driving circuit so as to adjust the suction force.

Description

Technical Field

[0001] The utility model belongs to the technical field of permanent magnet motor transformation and assembly, and in particular relates to a core pulling and hoisting device for permanent magnet transformation of an asynchronous motor rotor. Background Art

[0002] Permanent magnet synchronous motor refers to a motor that uses permanent magnets instead of energized coils for excitation. Since the rotor of a permanent magnet motor is a permanent magnet, the development of permanent magnet motors is inseparable from the development of permanent magnet materials. Although there have been many studies on permanent magnet motors before, it was not until the emergence of NdFeB that permanent magnet motors were truly valued and adopted by all walks of life. In the production of permanent magnet motors and the transformation of asynchronous motors, rotor core removal or core installation is involved. Since the permanent magnet motor rotor uses permanent magnets, its structure is more precise than that of traditional asynchronous induction motors, and its weight is larger. The professional requirements for its rotor assembly are extremely high. Once there is shaking and bumping during the lifting process, it will affect the overall performance of the motor. The traditional installation method uses an "L" type lifting tool. Only one end of the rotor shaft is inserted into the fixing ring of the lifting tool. The bearing is unevenly stressed, the rotor main shaft is deformed, and the rotor shakes as the lifting tool moves, which is extremely unreliable. In view of the above situation, there is an urgent need for a professional tool for the installation of permanent magnet motor rotors. Summary of the invention

[0003] The purpose of the utility model is to solve the above problems, and proposes a core pulling and hoisting device for permanent magnet transformation of asynchronous motor rotor, which adopts electromagnet to provide suction to permanent magnet motor rotor and control the force during hoisting process, and is characterized by comprising an electromagnetic suction platform 1, a rotor shaft fixing ring 2, a vertical telescopic joint 3, a vertical telescopic joint knob 4, and a hoisting ring 5;

[0004] A plurality of groups of electromagnet magnetic field Hall sensors 21 and rotor magnetic field Hall sensors 22 are installed on the lower surface of the electromagnetic suction platform 1; the electromagnet magnetic field Hall sensors 21 are located on the rotor shaft fixing ring 2 side of the electromagnetic suction platform 1, and the rotor magnetic field Hall sensors 22 are on the other side;

[0005] An upper pressure sensor 31 is installed on the upper side of the inner diameter of the rotor shaft fixing ring 2, and a lower pressure sensor 32 is installed on the lower side of the inner diameter of the rotor shaft fixing ring 2;

[0006] The hanging ring 5 is located on the electromagnetic suction platform 1;

[0007] The vertical telescopic joint 3 is a longitudinal connection structure between the electromagnetic suction platform 1 and the rotor shaft fixing ring 2, and has a length telescopic function;

[0008] The vertical telescopic joint knob 4 is used to adjust the telescopic length of the vertical telescopic joint 3;

[0009] The electromagnetic suction platform 1 is composed of a power supply, a controller, an electromagnet driving circuit, an upper pressure sensor, a lower pressure sensor, an electromagnet magnetic field Hall sensor, a rotor magnetic field Hall sensor and a plurality of electromagnets.

[0010] The upper pressure sensor is connected to the controller to transmit the collected pressure data of the motor shaft to the upper side of the rotor shaft fixing ring 2 to the controller;

[0011] The lower pressure sensor is connected to the controller to transmit the collected pressure data of the motor shaft to the lower side of the rotor shaft fixing ring 2 to the controller;

[0012] The electromagnet magnetic field Hall sensor is connected to the controller, and the collected data of each group of electromagnet magnetic field strength and polarity are sent to the controller;

[0013] The electromagnet magnetic field Hall sensor is connected to the controller, and the collected magnetic field strength and polarity data of each group of permanent magnet motor rotors are sent to the controller;

[0014] The electromagnet driving circuit controls the current value given to each group of electromagnets according to the controller instruction.

[0015] The power supply directly supplies power to the controller and the electromagnet drive circuit; the upper pressure sensor, the lower pressure sensor, the electromagnet magnetic field Hall sensor, and the rotor magnetic field Hall sensor are powered by the controller.

[0016] The multiple groups of electromagnets have the same electrical and ferromagnetic parameters and are evenly fixed in the electromagnetic suction platform 1 without crossing or overlapping each other.

[0017] The utility model proposes a core-pulling hoisting device for permanent magnet transformation of asynchronous motor rotors, which adopts an electromagnet to provide suction to the permanent magnet motor rotor, controls the force on the rotor during the hoisting process, and reduces uneven force on the rotor; the hoisting device has a length telescopic function and can be adjusted according to the radius and assembly size of the permanent magnet motor rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the equipment structure; 1 is the electromagnetic suction platform, 2 is the rotor shaft fixing ring, 3 is the vertical telescopic joint, 4 is the vertical telescopic joint knob, and 5 is the lifting ring.

[0019] Figure 2 Internal structure diagram of the electromagnetic suction platform of the lifting equipment; 11, 12, 13, and 14 are four sets of identical electromagnets.

[0020] Figure 3 The structural diagram of the lower side of the electromagnetic suction platform; wherein 21 is the electromagnet magnetic field Hall sensor, and 22 is the rotor magnetic field Hall sensor.

[0021] Figure 4 Layout diagram of the lifting ring sensor; wherein 31 is the upper pressure sensor and 32 is the lower pressure sensor.

[0022] Figure 5 Electrical schematic diagram of electromagnet.

[0023] Figure 6 Device usage scenario diagram; wherein 111 is the core-pulling lifting equipment, 112 is the permanent magnet rotor being lifted, and 113 is the hook. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] like Figure 1 As shown, the core pulling hoisting equipment for permanent magnet transformation of asynchronous motor rotor consists of an electromagnetic suction platform 1, a rotor shaft fixing ring 2, a vertical telescopic joint 3, a vertical telescopic joint knob 4, and a lifting ring 5; the electromagnetic suction platform 1 is a hollow alloy steel, 3 meters long and 2 meters wide, meeting the 5-ton lifting strength requirement; the rotor shaft fixing ring 2 is a solid cast iron structure, which is an integrated structure with the lower part of the vertical telescopic joint 3; the upper part of the vertical telescopic joint 3 is a steel structure integrated with the electromagnetic suction platform 1; the vertical telescopic joint 3 and the vertical telescopic joint knob 4 are matching adjustment and telescopic mechanisms, which meet the mechanical strength of the lifting, as well as the adjustment size and function. The four lifting rings 5 ​​are located at the four corners above the electromagnetic suction platform 1, and use detachable bolt lifting rings, and each structure has a strength greater than 2 tons.

[0026] like Figure 2 As shown, electromagnets 11, 12, 13, and 14 have the same electrical and ferromagnetic parameters and are evenly fixed in the electromagnetic suction platform 1 without crossing or overlapping each other; the electromagnetic suction of electromagnets 11, 12, 13, and 14 reaches 1 ton, the width of the electromagnets is 0.3 meters, and the gap is 0.1 meters.

[0027] like Figure 2 As shown, 7 groups of electromagnet magnetic field Hall sensors 21 and rotor magnetic field Hall sensors 22 are installed on the lower surface of the electromagnetic suction platform 1; the electromagnet magnetic field Hall sensors 21 are located on the rotor shaft fixing ring 2 side of the electromagnetic suction platform 1, and the rotor magnetic field Hall sensors 22 are on the other side; the 7 groups of electromagnet magnetic field Hall sensors 21 are respectively located in the middle of the 4 electromagnets and in the middle of the gap between the electromagnets.

[0028] like Figure 3 As shown, an upper pressure sensor 31 is installed on the upper side of the inner diameter of the rotor shaft fixing ring 2, and a lower pressure sensor 32 is installed on the lower side of the inner diameter of the rotor shaft fixing ring 2; the inner diameter of the rotor shaft fixing ring 2 is 100 mm, and the upper pressure sensor 31 and the lower pressure sensor 32 have a measuring range of 1 ton and a sensitivity of 10 kg.

[0029] like Figure 4 As shown, the vertical telescopic joint 3 is a longitudinal connection structure of the electromagnetic suction platform 1 and the rotor shaft fixing ring 2, and has a length telescopic function; the vertical telescopic joint knob 4 is used for the telescopic length of the vertical telescopic joint 3, and the adjustment range is between 0.3 meters and 0.5 meters.

[0030] like Figure 5 As shown, the electromagnetic suction platform 1 is composed of a power supply, a controller, an electromagnet driving circuit, an upper pressure sensor, a lower pressure sensor, an electromagnet magnetic field Hall sensor, a rotor magnetic field Hall sensor and multiple groups of electromagnets.

[0031] The upper pressure sensor is connected to the controller to transmit the collected pressure data of the motor shaft to the upper side of the rotor shaft fixing ring 2 to the controller; the lower pressure sensor is connected to the controller to transmit the collected pressure data of the motor shaft to the lower side of the rotor shaft fixing ring 2 to the controller; the electromagnet magnetic field Hall sensor is connected to the controller to transmit the collected data of each group of electromagnet magnetic field strength and polarity to the controller; the electromagnet magnetic field Hall sensor is connected to the controller to transmit the collected data of each group of permanent magnet motor rotor magnetic field strength and polarity to the controller.

[0032] The power supply directly supplies power to the controller and the electromagnet drive circuit; the upper pressure sensor, the lower pressure sensor, the electromagnet magnetic field Hall sensor, and the rotor magnetic field Hall sensor are powered by the controller.

[0033] The electromagnet drive circuit controls the current value given to each group of electromagnets according to the controller instruction.

[0034] like Figure 6As shown, when in use, one end of the main shaft of the permanent magnet rotor 112 to be hoisted is inserted into the rotor shaft fixing ring 2 of the core-pulling hoisting device 111, and the hook 113 of the lifting device is lifted by the steel cable lifting ring 5. After the core-pulling hoisting device 111 is lifted, after the rotor shaft fixing ring 2 leaves the ground, the controller detects the position of the rotor permanent magnet through the rotor magnetic field Hall sensor 22, and adjusts the current of the electromagnet driving circuit to the electromagnet according to the position of the permanent magnet, so that the polarity of the electromagnet is opposite to that of the permanent magnet at the corresponding position. The controller detects the force of the permanent magnet rotor 112 through the upper pressure sensor 31 and the lower pressure sensor 32; but when the force is large, the controller commands the electromagnet driving circuit to increase the current to the electromagnet, and increases the suction of the electromagnet to the rotor until the pressure detected by the upper pressure sensor 31 and the lower pressure sensor 32 is about 20kg. At this time, the lifting equipment can be moved toward the motor stator, and the rotor can be gradually aligned with the inner bore of the stator. The horizontal angle of the rotor and the gap in the inner bore of the stator can be observed. The current of the electromagnet drive circuit to the electromagnet can be manually adjusted in real time according to the position and the electric suction force fed back by the electromagnet magnetic field Hall sensor 21, and the safe distance between the rotor and the stator can be maintained until the required position is reached. The core-through lifting process is the same as the core-pulling lifting process.

[0035] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A core pulling and hoisting device for permanent magnet transformation of asynchronous motor rotor, characterized in that It comprises an electromagnetic suction platform (1), a rotor shaft fixing ring (2), a vertical telescopic joint (3), a vertical telescopic joint knob (4), and a lifting ring (5); A plurality of groups of electromagnet magnetic field Hall sensors (21) and rotor magnetic field Hall sensors (22) are installed on the lower surface of the electromagnetic suction platform (1); the electromagnet magnetic field Hall sensors (21) are located on one side of the rotor shaft fixing ring (2) of the electromagnetic suction platform (1), and the rotor magnetic field Hall sensors (22) are located on the other side; An upper pressure sensor (31) is installed on the upper side of the inner diameter of the rotor shaft fixing ring (2), and a lower pressure sensor (32) is installed on the lower side of the inner diameter of the rotor shaft fixing ring (2); The hanging ring (5) is located on the electromagnetic suction platform (1); The vertical telescopic joint (3) is a longitudinal connection structure between the electromagnetic suction platform (1) and the rotor shaft fixing ring (2), and has a length telescopic function; The vertical telescopic joint knob (4) is used to adjust the telescopic length of the vertical telescopic joint (3); The electromagnetic suction platform (1) is composed of a power supply, a controller, an electromagnet drive circuit, an upper pressure sensor, a lower pressure sensor, an electromagnet magnetic field Hall sensor, a rotor magnetic field Hall sensor and a plurality of groups of electromagnets.

2. The core pulling and hoisting equipment for permanent magnet transformation of asynchronous motor rotor according to claim 1 is characterized in that: The upper pressure sensor is connected to a controller and transmits the collected pressure data of the motor shaft to the upper side of the rotor shaft fixing ring (2) to the controller; The lower pressure sensor is connected to a controller and transmits the collected pressure data of the motor shaft to the lower side of the rotor shaft fixing ring (2) to the controller; The electromagnet magnetic field Hall sensor is connected to the controller, and the collected data of each group of electromagnet magnetic field strength and polarity are sent to the controller; The electromagnet magnetic field Hall sensor is connected to the controller, and the collected magnetic field strength and polarity data of each group of permanent magnet motor rotors are sent to the controller; The electromagnet drive circuit controls the current value supplied to each group of electromagnets according to the controller instruction; The power supply directly supplies power to the controller and the electromagnet drive circuit.

3. The core pulling and hoisting equipment for permanent magnet transformation of asynchronous motor rotor according to claim 1 is characterized in that: The multiple groups of electromagnets have the same electrical and ferromagnetic parameters and are evenly fixed in the electromagnetic suction platform (1) without crossing or overlapping each other.

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