Magnetic detection device of permanent magnet synchronous traction machine

Abstract

The utility model discloses a magnetism detection device of a permanent magnet synchronous traction machine, which relates to the technical field of elevator equipment detection, and comprises a permanent magnet synchronous traction machine and a gauss meter, the permanent magnet synchronous traction machine comprises a machine base, a rotor brake drum and a stator, and a magnetic steel assembly is arranged in the rotor brake drum. A plurality of groups of magnetic steel sheets are uniformly arrayed on the magnetic steel assembly, the rotor brake drum is sleeved outside the stator and is connected with the engine base, a detection hole is formed in the back of the engine base, the detection hole penetrates through the engine base and the stator, a probe of the gauss meter extends into the detection hole, and the detection hole is connected with the stator. A positioning line is arranged at the position, corresponding to the detection hole, of the outer side of the machine base, a plurality of scale lines are arrayed on the periphery of the rotor brake drum in the circumferential direction, and each scale line corresponds to the center position of each set of magnetic steel sheets. According to the utility model, the magnetism of the internal magnetic steel sheet is conveniently detected, the dismounting steps are reduced, and the detection efficiency is improved; and meanwhile, demagnetized or abnormal magnetic steel sheets can be quickly positioned.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator equipment detection, in particular to a magnetic detection device for a permanent magnet synchronous traction machine. Background Art

[0002] Permanent magnet synchronous traction machine with low speed and high torque characteristics has attracted more and more attention from the elevator industry due to its advantages of energy saving, small size, stable low speed operation, low noise and maintenance-free. Permanent magnet synchronous traction machine includes base, stator, rotor brake drum, etc. The permanent magnet is fixed on the inner wall of the rotor brake drum. The rotor brake drum is installed on the shaft through a key. The shaft is installed on the double-sided sealed deep groove ball bearing on the rear base and the spherical roller bearing installed on the front base. The traction wheel is fixed on the tapered shaft through a key and locked with a gland and bolts. The rotary encoder is installed at the rear end of the shaft. The pressure plate presses the stator onto the stator support of the rear base. The front base is positioned on the rear base through a stopper. Holes are opened on both sides of the front base for the friction block on the brake to pass through.

[0003] The magnetic steel sheets arranged in the circumferential array inside the rotor brake drum use high-performance neodymium iron boron as the main permanent magnet material. However, in actual use, the magnetic steel sheets will be demagnetized, causing large vibrations and noises during the operation of the elevator. At the same time, the elevator is difficult to start, and even cannot start in serious cases. Therefore, it is necessary to regularly maintain and check the magnetism of the magnetic steel sheets, and replace the magnetic steel sheet assembly in time when necessary.

[0004] The existing process for magnetic detection of magnetic steel sheets in the rotor body is as follows:

[0005] 1. The elevator is driven to the top floor to support the counterweight reliably;

[0006] 2. Lift the elevator car with a hoist and lower the traction wire rope from the traction sheave;

[0007] 3. Use special tools to disassemble the fixing device, and use a hoist to lift the rotor brake drum and magnetic steel assembly away from the housing base and stator assembly;

[0008] 4. Use a Gauss meter to detect the surface magnetic value of each magnetic steel sheet, and compare it with the surface magnetic value range required by the manufacturer to confirm the demagnetization and damage;

[0009] 5. When the demagnetization and damage of the magnetic steel sheet assembly exceeds the specified value, replace the entire assembly.

[0010] The above detection process is too cumbersome. The permanent magnet synchronous traction machine needs to be opened for each detection, and the magnetic properties of the internal magnetic steel sheets need to be measured one by one. The detection efficiency is low and the labor cost is high. Utility Model Content

[0011] The utility model aims to provide a magnetic detection device for a permanent magnet synchronous traction machine to solve the problems existing in the background technology.

[0012] The purpose of this utility model is achieved through the following technical solutions:

[0013] A magnetic detection device for a permanent magnet synchronous traction machine comprises a permanent magnet synchronous traction machine and a Gaussmeter, wherein the permanent magnet synchronous traction machine comprises a machine base, a rotor brake drum and a stator, wherein a magnetic steel assembly is arranged inside the rotor brake drum, and a plurality of groups of magnetic steel sheets are evenly arrayed on the magnetic steel assembly, wherein the rotor brake drum is sleeved outside the stator and connected to the machine base, wherein a detection hole is arranged on the back of the machine base, wherein the detection hole passes through the machine base and the stator, wherein one end of the detection hole is located below the magnetic steel sheet, wherein a probe of the Gaussmeter extends into the detection hole, wherein a positioning line is arranged on the outer side of the machine base corresponding to the position of the detection hole, wherein a plurality of scale lines are arranged in a circumferential direction outside the rotor brake drum, and each of the scale lines corresponds to the center position of each group of the magnetic steel sheets.

[0014] Furthermore, the detection hole is a conical hole, the aperture of the detection hole at one end close to the magnetic steel sheet is the smallest, and the probe of the Gaussmeter is adapted to the size of the detection hole.

[0015] Furthermore, the detection hole is arranged at an angle, and the probe end of the Gaussmeter forms an angle with the magnetic steel sheet.

[0016] Furthermore, a dust plug assembly is provided outside the detection hole, and the dust plug assembly includes a rotating seat and a plug, the plug is connected to the rotating seat through an elastic rope, the rotating seat is connected to the machine base, and the size of the plug matches the size of the detection hole.

[0017] The beneficial effects of the utility model are:

[0018] 1) During daily maintenance or regular inspection, insert the probe of the Gaussmeter into the detection hole, and then measure the magnetism of each magnetic steel sheet in the rotor brake drum through maintenance operation or turning. There is no need to disassemble the permanent magnet synchronous traction machine, which reduces the disassembly steps and improves the detection efficiency.

[0019] 2) There is a positioning line on the outside of the machine base above the detection hole, and a scale line is set on the outside of the rotor brake drum corresponding to the position of the magnetic steel sheet. Therefore, when testing each group of magnetic steel sheets, the scale line above them corresponds to the positioning line to ensure that the probe of the Gaussmeter can accurately correspond to the magnetic steel sheet, thereby improving the detection accuracy. At the same time, it can quickly locate demagnetized or abnormal magnetic steel sheets to facilitate later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of a magnetic detection device of a permanent magnet synchronous traction machine of the utility model;

[0021] Figure 2 This is a cross-sectional view of the machine base in the utility model;

[0022] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0023] Figure 4 It is an exploded view of a magnetic detection device of a permanent magnet synchronous traction machine of the utility model;

[0024] In the figure, 1-machine base, 101-positioning line, 2-rotor brake drum, 201-scale line, 3-magnetic steel sheet, 4-Gauss meter, 5-detection hole, 6-dust plug assembly, 601-rotating seat, 602-plug, 7-stator. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments to clearly and completely describe the technical solution 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 of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0026] Example 1

[0027] See also Figure 1-Figure 4 The utility model provides a technical solution: a magnetic detection device for a permanent magnet synchronous traction machine, comprising a permanent magnet synchronous traction machine and a Gaussmeter 4, the permanent magnet synchronous traction machine comprising a machine base 1, a rotor brake drum 2 and a stator 7, a magnetic steel assembly is arranged in the rotor brake drum 2, a plurality of groups of magnetic steel sheets 3 are evenly arrayed on the magnetic steel assembly, the rotor brake drum 2 is sleeved outside the stator 7 and connected to the machine base 1, a detection hole 5 is arranged on the back of the machine base 1, the detection hole 5 passes through the machine base 1 and the stator 7, one end of the detection hole 5 is located below the magnetic steel sheet 3, the probe of the Gaussmeter 4 extends into the detection hole 5, a positioning line 101 is arranged on the outer side of the machine base 1 corresponding to the position of the detection hole 5, a plurality of scale lines 201 are arranged in a circumferential direction on the outer side of the rotor brake drum 2, and each of the scale lines 201 corresponds to the center position of each group of the magnetic steel sheets 3.

[0028] Through the above technical solution, during daily maintenance or regular inspection, the probe of the Gaussmeter 4 is inserted into the detection hole 5, and then the magnetism of each magnetic steel sheet 3 in the rotor brake drum 2 can be measured through maintenance operation or turning, without disassembling the permanent magnet synchronous traction machine, reducing the disassembly steps and improving the detection efficiency. At the same time, a positioning line 101 is provided on the outside of the machine base 1 above the detection hole 5, and a scale line 201 is provided on the outside of the rotor brake drum 2 at the position corresponding to the magnetic steel sheet 3, so when each group of magnetic steel sheets 3 is detected, the scale line 201 above it corresponds to the positioning line 101, ensuring that the probe of the Gaussmeter 4 can accurately correspond to the magnetic steel sheet 3, improving the detection accuracy, and at the same time, it can quickly locate the demagnetized or abnormal magnetic steel sheet 3, which is convenient for later maintenance. At the same time, according to the detection result of the Gaussmeter 4, if the number of demagnetized magnetic steel sheets 3 is within the specified range, it does not need to be replaced, and if the number of demagnetized magnetic steel sheets 3 exceeds the range, it is replaced in time, which improves the accuracy of replacement.

[0029] Furthermore, the detection hole 5 is a conical hole, the aperture of the detection hole 5 at one end close to the magnetic steel sheet 3 is the smallest, and the probe of the gaussmeter 4 is adapted to the size of the detection hole 5 .

[0030] Through the above technical solution, the probe of the gaussmeter 4 and the detection hole 5 are matched through the conical surface, ensuring that the gaussmeter 4 fits tightly after being inserted into the detection hole 5. At the same time, the conical hole can ensure that the probe of the gaussmeter 4 just extends out of the detection hole 5 and is located at the center below the magnetic steel sheet 3, which is convenient for the detection of the gaussmeter 4 and improves the detection accuracy.

[0031] Furthermore, the detection hole 5 is arranged at an angle, and the probe end of the gaussmeter 4 forms an angle with the magnetic steel sheet 3 .

[0032] Through the above technical solution, the detection hole 5 is arranged obliquely, so that the inserted Gaussmeter 4 probe forms an angle with the magnetic steel sheet 3, which facilitates the Gaussmeter 4 probe end to measure the magnetic steel sheet 3 and improves the detection effect.

[0033] Furthermore, the detection hole 5 is provided with a dust plug assembly 6, and the dust plug assembly 6 includes a rotating seat 601 and a plug 602, the plug 602 is connected to the rotating seat 601 through an elastic rope, the rotating seat 601 is connected to the machine base 1, and the size of the plug 602 matches the size of the detection hole 5.

[0034] Through the above technical solution, during daily operation, the plug 602 is inserted into the detection hole 5, and the dust plug assembly 6 is used to ensure the sealing of the detection hole 5 to protect the internal structure of the permanent magnet synchronous traction machine; when inspection is required, the plug 602 is pulled out and the probe of the Gaussmeter 4 is inserted.

[0035] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be protected by the claims attached to the utility model.

Claims

1. A magnetic detection device for a permanent magnet synchronous traction machine, comprising a permanent magnet synchronous traction machine and a gauss meter (4), wherein the permanent magnet synchronous traction machine comprises a machine base (1), a rotor brake drum (2) and a stator (7), wherein a magnetic steel assembly is arranged inside the rotor brake drum (2), and a plurality of groups of magnetic steel sheets (3) are arranged in a uniform array on the magnetic steel assembly, wherein the rotor brake drum (2) is sleeved outside the stator (7) and connected to the machine base (1), and wherein: The back of the machine base (1) is provided with a detection hole (5), the detection hole (5) passes through the machine base (1) and the stator (7), one end of the detection hole (5) is located below the magnetic steel sheet (3), the probe of the gauss meter (4) extends into the detection hole (5), a positioning line (101) is provided on the outside of the machine base (1) at a position corresponding to the detection hole (5), and a plurality of scale lines (201) are arranged in an outer circumferential array on the rotor brake drum (2), each of the scale lines (201) corresponding to the center position of each group of the magnetic steel sheets (3).

2. The magnetic detection device for a permanent magnet synchronous traction machine according to claim 1, characterized in that: The detection hole (5) is a conical hole, and the hole diameter of the detection hole (5) at one end close to the magnetic steel sheet (3) is the smallest. The probe of the gauss meter (4) is adapted to the size of the detection hole (5).

3. The magnetic detection device for a permanent magnet synchronous traction machine according to claim 2, characterized in that: The detection hole (5) is arranged at an angle, and the probe end of the Gauss meter (4) forms an angle with the magnetic steel sheet (3).

4. The magnetic detection device for a permanent magnet synchronous traction machine according to claim 1, characterized in that: A dust plug assembly (6) is provided outside the detection hole (5), the dust plug assembly (6) comprising a rotating seat (601) and a plug (602), the plug (602) being connected to the rotating seat (601) via an elastic rope, the rotating seat (601) being connected to the machine base (1), and the size of the plug (602) matching the size of the detection hole (5).

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