Silicon steel sheet for permanent magnet electric roller

Abstract

The invention discloses a silicon steel sheet for a permanent magnet electric roller, and belongs to the technical field of permanent magnet electric rollers, the silicon steel sheet comprises a silicon steel sheet body, coil grooves, positioning grooves, mounting holes, positioning key grooves and positioning flanges, the coil grooves are uniformly formed in the upper edge of the silicon steel sheet body, the positioning key grooves are formed in the lower edge close to the right side, and the positioning groove is formed in the middle of the left side; a mounting hole is formed in the middle lower part of the right side; the positioning grooves are matched with the positioning flanges of the adjacent silicon steel sheets, so that the silicon steel sheets are connected to form a circular ring; the mounting holes are used for mounting screws, so that the silicon steel sheet circular rings are overlapped together to form a silicon steel sheet cylinder; the positioning key grooves correspond to the stator key grooves, the silicon steel sheet barrel and the stator roller are positioned and fixed through the stator flat keys, and the silicon steel sheet barrel is arranged on the roller stator in a sleeving mode. The silicon steel sheet is convenient to install, accurate in positioning and improved in electromagnetic performance.

Description

Technical Field

[0001] The invention belongs to the technical field of permanent magnet electric rollers, and in particular relates to a silicon steel sheet for a permanent magnet electric roller. Background Art

[0002] Permanent magnet electric roller is an indispensable driving component of underground belt conveyor in coal mines. Its traditional combination is motor, reducer, coupling and roller. With the continuous advancement of technology, a permanent magnet electric roller has been developed, which integrates motor, coupling and roller into one, uses inverter to adjust speed, has the characteristics of simple structure, maintenance-free, long service life, etc., and is very popular among users. However, at present, the processing and installation of silicon steel sheets in permanent magnet electric roller are complicated, and the splicing and positioning of silicon steel sheets are not accurate enough, especially in the environment with high requirements for magnetic field stability and precision, which affects the overall performance of permanent magnet electric roller. Summary of the invention

[0003] The present invention provides a silicon steel sheet for a permanent magnet electric roller. The shape and structure of the silicon steel sheet for the permanent magnet electric roller are optimized so that the silicon steel sheet can be conveniently processed, stacked and assembled. The formed silicon steel sheet cylinder is accurately positioned, and the overall performance of the permanent magnet electric roller is improved.

[0004] The technical solution of the present invention is: a silicon steel sheet for a permanent magnet electric roller, comprising a silicon steel sheet body, a coil groove, a positioning groove, a mounting hole, a positioning key groove, and a positioning flange. The upper edge of the silicon steel sheet body is evenly provided with coil grooves, the lower edge is provided with a positioning key groove near the right side, the middle of the left side is provided with a positioning groove, the middle of the right side is provided with a positioning flange, and the middle and lower part is provided with a mounting hole; the positioning groove cooperates with the positioning flange of the adjacent silicon steel sheet to connect the silicon steel sheets to form a circular ring; the mounting hole is used to install a screw rod so that the silicon steel sheet circular rings are superimposed together to form a silicon steel sheet cylinder; the positioning key groove corresponds to the stator key groove, and the silicon steel sheet cylinder and the stator roller are positioned and fixed by the stator flat key, and the silicon steel sheet cylinder is sleeved on the roller stator.

[0005] Furthermore, the coil slots are arranged in a rectangular shape, and there are 11 of them for installing the formed coils.

[0006] Furthermore, the number of the mounting holes is 2.

[0007] Furthermore, the outer radius of the silicon steel sheet is 556 mm, and the inner radius is 451.5 mm.

[0008] Furthermore, the silicon steel sheet is an alloy steel with a silicon content of 3%-4.5% and a thickness of 0.35-0.5 mm.

[0009] Furthermore, the stacking gap of the silicon steel sheets is 0.02-0.05 mm.

[0010] Furthermore, a phosphate coating, a ceramic coating or an organic coating is used between the silicon steel sheets.

[0011] Furthermore, the distance between the outer side of the silicon steel sheet cylinder and the permanent magnet embedded in the permanent magnet drum is 1.5 mm.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The shape and structure design of the silicon steel sheet of the present invention is suitable for processing methods such as stamping and shearing, which avoids excessively high processing costs and ensures processing accuracy; the silicon steel sheet mounting holes and screws are convenient for stacking and fastening of the silicon steel sheets, and the positioning grooves are matched with the positioning flanges of the adjacent silicon steel sheets to form a tight and stable silicon steel sheet cylindrical iron core structure, which is convenient for stacking and assembly.

[0013] 2. The silicon steel sheet coil slots are stacked flat, which is convenient for embedding the molded coil. The coil slot partitions extend outward, increasing the contact area with the air, which is beneficial to the heat dissipation of the coil or silicon steel sheet cylinder.

[0014] 3. The positioning keyway of the silicon steel sheet corresponds to the keyway of the stator. The silicon steel sheet cylinder and the stator roller are fixed by the stator flat key, which facilitates the positioning and installation of the silicon steel sheet cylinder and greatly improves work efficiency.

[0015] 4. The silicon steel sheets are thin and have small gaps. The insulating coating is set and the stacking assembly is accurate, stable and complete, which ensures the good closure of the magnetic flux, reduces the leakage magnetic field and the uniform distribution of the magnetic field, effectively reduces the eddy current loss, and improves the overall performance of the permanent magnet electric drum product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic structural diagram of a silicon steel sheet for a permanent magnet electric drum.

[0017] Figure 2 This is a schematic diagram of assembling a silicon steel sheet for a permanent magnet electric drum according to the present invention.

[0018] Figure 3 The present invention is a schematic diagram of the structure of a silicon steel sheet cylinder for a permanent magnet electric roller.

[0019] Figure 4 The present invention is a schematic diagram of the connection between a silicon steel sheet cylinder for a permanent magnet electric roller and a roller stator.

[0020] Figure 5 This is a schematic diagram of the permanent magnet drum structure.

[0021] Figure 6 This is a schematic diagram of the permanent magnet electric drum structure.

[0022] In the figure: 100, silicon steel sheet cylinder, 200, drum stator, 300, permanent magnet drum, 400, permanent magnet electric drum, 1, silicon steel sheet body, 2, coil groove, 3, positioning groove, 4, mounting hole, 5, positioning keyway, 6, positioning flange, 7, stator keyway, 8, customized flat key, 9, permanent magnet drum cylinder, 10, permanent magnet, 11, screw. DETAILED DESCRIPTION

[0023] The following will be combined with the attached Figure 1-Figure 6 The present invention is clearly and completely described in the following embodiments. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The embodiments of the present invention include but are not limited to the following embodiments.

[0024] As attached Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the present embodiment is a silicon steel sheet for a permanent magnet electric drum, comprising a silicon steel sheet body 1, a coil slot 2, a positioning groove 3, a mounting hole 4, a positioning key slot 5, and a positioning flange 6. The coil slots 2 are evenly arranged on the upper edge of the silicon steel sheet body 1, the positioning key slot 5 is arranged near the right side of the lower edge, the positioning groove 3 is arranged in the middle of the left side, the positioning flange 6 is arranged in the middle of the right side, and the mounting hole 4 is arranged in the middle and lower part; the coil slot 2 is designed to be rectangular and is used to install the formed coil. The positioning groove 3 cooperates with the positioning flange 6 of the adjacent silicon steel sheet to play a role in precise positioning and fixing; the mounting hole 4 is used to install the screw 11, and the silicon steel sheets are stacked and assembled together to form a silicon steel sheet barrel 100. The positioning key slot 5 corresponds to the stator key slot 7. The silicon steel sheet barrel 100 and the stator drum 200 are positioned and fixed by the stator flat key 8, and the silicon steel sheet barrel 100 is sleeved on the stator drum 200.

[0025] In the above embodiment, the silicon steel sheets select alloy steel with a silicon content of 3%-4.5% to increase the resistivity of the silicon steel sheets and reduce eddy current losses; the thickness of the silicon steel sheets is selected to be 0.35-0.5mm, which shortens the eddy current path, increases the eddy current resistance, and effectively reduces the eddy current losses; the gap between the stacked silicon steel sheets is set to be 0.02-0.05mm, which effectively reduces the magnetic resistance of the silicon steel sheets, reduces eddy current losses, and improves the electromagnetic performance of the equipment; phosphate coating, ceramic coating or organic coating is used between the silicon steel sheets to ensure good insulation between the silicon steel sheets and prevent the formation of large eddy current loops between the silicon steel sheets.

[0026] As attached Figure 5 , Figure 6As shown, the permanent magnet roller 300 includes a permanent magnet roller body 9 and a permanent magnet 10. The permanent magnet 10 is embedded in the permanent magnet roller body 9. The permanent magnet 10 is a small arc-shaped magnetic block. According to the inner arc surface magnetic pole, it is divided into two types: N and S. When assembled, the N pole and the S pole are adjacent, that is, a row of N pole magnetic blocks, and the other adjacent row is S pole magnetic blocks, forming N pole and S pole magnetic fields, corresponding to the electromagnetic field of the coil, and using mutual magnetic force to make it rotate. The gap between the outer side of the silicon steel sheet barrel 100 and the permanent magnet roller 10 is 0.2-1.5mm, so that the torque output by the permanent magnet motor roller is stable. The permanent magnet roller 300 is sleeved on the outside of the silicon steel sheet barrel 100 and the stator roller 200 to form a permanent magnet electric roller 400.

[0027] The steps for installing silicon steel sheets for a permanent magnet electric drum of the present invention are as follows: S1, silicon steel sheet bonding, according to the needs, first use special glue to bond the silicon steel sheets into blocks and stack them together. The length and diameter of the silicon steel sheet cylinder are related to the product specifications. The number of stacked silicon steel sheets and the diameter size are set according to the product specifications.

[0028] S2, cylinder assembly, after completing step S1, install the bonded silicon steel blocks on the screw, and the adjacent silicon steel blocks are matched with the positioning flange through the positioning groove. After completing one circle, proceed to the next circle to ensure that the positioning keyway positions are consistent. After the assembly is completed, the silicon steel sheet cylinder is formed.

[0029] S3, press-fitting operation. After completing step S2, the silicon steel sheet cylinder is first preheated, and then the silicon steel sheet cylinder is press-fitted onto the stator using a four-column press, and the silicon steel sheet cylinder 100 and the stator roller 200 are positioned and fixed by the stator flat key 8.

Claims

1. A silicon steel sheet for a permanent magnet electric drum, characterized in that: The invention comprises a silicon steel sheet body (1), a coil groove (2), a positioning groove (3), a mounting hole (4), a positioning key groove (5), and a positioning flange (6). The upper edge of the silicon steel sheet body (1) is evenly provided with coil grooves (2), the lower edge is provided with a positioning key groove (5) near the right side, the middle part of the left side is provided with a positioning groove (3), the middle part of the right side is provided with a positioning flange (6), and the middle and lower part is provided with a mounting hole (4); the positioning groove (3) cooperates with the positioning flange (6) of the adjacent silicon steel sheet to connect the silicon steel sheets to form a circular ring; the mounting hole (4) is used to install a screw rod (11) so that the silicon steel sheet circular rings are superimposed and assembled together to form a silicon steel sheet barrel (100); the positioning key groove (5) corresponds to the stator key groove (7), and the silicon steel sheet barrel (100) and the stator roller (200) are positioned and fixed by the stator flat key (8), and the silicon steel sheet barrel (100) is sleeved on the stator roller (200).

2. The silicon steel sheet for permanent magnet electric drum according to claim 1, characterized in that: The coil slots (2) are arranged in a rectangular shape, and are 11 in number, and are used to install formed coils.

3. The silicon steel sheet for permanent magnet electric drum according to claim 1, characterized in that: The number of the mounting holes (4) is two.

4. The silicon steel sheet for permanent magnet electric drum according to claim 1, characterized in that: The outer radius of the silicon steel sheet is 556 mm, and the inner radius is 451.5 mm.

5. The silicon steel sheet for permanent magnet electric drum according to claim 1, characterized in that: The silicon steel sheet is an alloy steel with a silicon content of 3%-4.5% and a thickness of 0.35-0.5mm.

6. The silicon steel sheet for permanent magnet electric drum according to claim 1, characterized in that: The stacking gap of the silicon steel sheets is 0.02-0.05 mm.

7. The silicon steel sheet for permanent magnet electric drum according to claim 1, characterized in that: Phosphate coating, ceramic coating or organic coating is used between the silicon steel sheets.

8. The silicon steel sheet for a permanent magnet electric drum according to claim 1, characterized in that: The distance between the outer side of the silicon steel sheet cylinder (100) and the permanent magnet (10) embedded in the permanent magnet roller (300) is 1.5 mm.

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