Overheating deformation prevention structure for coupling ring of conductor wheel of permanent magnet coupler

Abstract

The invention discloses a permanent magnet coupler conductor wheel coupling ring overheating deformation prevention structure which comprises an input side hub, a conductor wheel, an output side hub and a magnet wheel, the conductor wheel comprises an outer steel ring and an inner steel ring which are connected with a transmission disc, and coupling rings are installed on the inner circle of the outer steel ring and the outer circle of the inner steel ring respectively. The coupling ring is composed of arc-shaped plates which are evenly divided into a plurality of sections in the circumferential direction, a plurality of through holes with the same number are evenly distributed in the symmetrical center line and the two sides of each arc-shaped plate, the through holes in the symmetrical center line are standard circular through holes, the through holes in the two sides of the symmetrical center line are long kidney-shaped through holes in the circumferential direction, and when the arc-shaped plates are subjected to thermal expansion, the through holes in the two sides of the symmetrical center line are in the same shape. Protruding deformation caused by blocking of the fixing screws is prevented through the long kidney-shaped holes. Equipment accidents caused by high-temperature deformation of the coupling ring during on-load starting, heavy-load operation or overload operation of the permanent magnet coupler are avoided, the allowable use temperature of the permanent magnet coupler is increased, and the service life of the permanent magnet coupler is prolonged.

Description

Technical Field

[0001] The present invention belongs to the field of mechanical transmission, and relates to a permanent magnet coupling with a circular ring coupling, specifically a structure for preventing overheating and deformation of the conductor wheel coupling ring of a permanent magnet coupling; this structure is widely used in the power transmission between motors and various equipment in industries such as mining, building materials, coal, ports, electricity, water conservancy, metallurgy, and chemical industry, and is suitable for equipment with load starting, heavy load, and overload operating conditions. Background Art

[0002] In the existing known cylindrical permanent magnet couplings, their permanent magnet coupling rings are all in the form of an integral ring or a ring structure welded by rolled plates. Most of them use copper as the material for cutting magnetic lines of force and inducing eddy currents and induced magnetic fields. When encountering load starting, heavy load operation, or long-term overload operation, the intensity of the induced eddy currents is relatively large, which will generate a very high temperature. Once the high temperature lasts for a long time, the coupling ring will undergo thermal expansion. Since copper has a relatively large linear expansion coefficient, the circumference of its circular ring will increase a lot. Since the coupling ring is usually fixed to the inner and outer steel rings with screws according to the conventional structure, the coupling ring with an increased circumferential length will bulge and deform radially. Because the air gap between the general conductor wheel and the magnet wheel is very small, interference and friction are likely to occur between the deformed coupling ring and the magnet wheel, causing the temperature of the coupling ring to rise faster, resulting in failures of the permanent magnet coupling and even burnout accidents. Therefore, there is an urgent need to design a structure for preventing overheating and deformation of the conductor wheel coupling ring of a permanent magnet coupling to eliminate problems such as interference and friction caused by the thermal expansion and deformation bulge of the coupling ring, avoid equipment accidents caused by the high-temperature deformation of the coupling ring during load starting, heavy load operation, or overload operation of the permanent magnet coupling, improve the allowable operating temperature of the permanent magnet coupling, and extend the service life of the permanent magnet coupling. Summary of the Invention

[0003] The object of the present invention is to provide a structure for preventing overheating and deformation of the conductor wheel coupling ring of a permanent magnet coupling, which adopts a structure of segmentally reserving expansion joints and long waist-shaped mounting holes for the coupling ring, avoiding equipment accidents caused by the high-temperature deformation of the coupling ring during load starting, heavy load operation, or overload operation of the permanent magnet coupling, improving the allowable operating temperature of the permanent magnet coupling, and extending the service life of the permanent magnet coupling.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows: A structure for preventing overheating and deformation of the coupling ring of the conductor wheel of a permanent magnet coupling, including an input-side hub, a conductor wheel, an output-side hub, and a magnet wheel. The conductor wheel includes an outer steel ring and an inner steel ring connected to the driving disc. Coupling rings are respectively installed on the inner circle of the outer steel ring and the outer circle of the inner steel ring. The coupling ring is composed of arc-shaped plates evenly divided into several segments in the circumferential direction. A number of through holes with equal quantity are evenly distributed on the symmetry center line and on both sides thereof of each arc-shaped plate. The through holes on the symmetry center line are standard circular through holes, and the through holes on both sides of the symmetry center line are long waist-shaped through holes in the circumferential direction. When the arc-shaped plate thermally expands, the long waist-shaped holes prevent the bulging deformation caused by the obstruction of the fixing screws.

[0005] Further, a certain-width expansion joint is left between adjacent arc-shaped plates to avoid deformation caused by mutual pushing due to thermal expansion, thereby realizing the function of preventing overheating and deformation of the coupling ring of the conductor wheel of the permanent magnet coupling.

[0006] Further, the through holes on both sides are respectively fixed to the inner circle of the outer steel ring and the outer circle of the outer steel ring by hexagon socket head cap screws.

[0007] Further, the magnet wheel includes a permanent magnet and a magnet ring. The permanent magnet is assembled in the magnet slot of the magnet ring. At the same time, the magnet ring is rigidly connected to the output-side hub. When the driving shaft drives the input-side hub and the conductor wheel to rotate, the coupling ring rotates accordingly and makes a cutting magnetic force movement in the magnetic field of the magnet wheel. The input-side torque is transmitted to the output-side load shaft through the output-side hub through magnetic field coupling, thereby driving the load to rotate.

[0008] Further, the permanent magnets are evenly embedded in the magnet ring in a manner of having different polarities along the circumferential direction of the magnet ring.

[0009] Further, the outer end of the driving disc is rigidly connected to the input-side hub.

[0010] The beneficial effects of the present invention are as follows:

[0011] The present invention can avoid accidents such as high-temperature deformation and bulging of the coupling ring during load starting, heavy load or overload operation, and interference and friction with the magnet wheel, improve the allowable temperature range of the permanent magnet coupling, and enhance the comprehensive performance and service life of the coupling. Specifically, when the coupling ring cuts the magnetic force line during load starting, heavy load or overload operation, a large amount of eddy current and heat will be generated and the temperature will rise rapidly. After the arc-shaped plate is heated and expands, it will elongate in the circumferential direction. Since the arc-shaped plates are installed in segments and are designed with thermal expansion joints and long waist-shaped mounting holes, problems such as bulging of the arc-shaped plate due to thermal expansion deformation are avoided, thereby realizing the function of preventing thermal deformation of the coupling ring of the conductor wheel of the permanent magnet coupling.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned by practice of the present invention. Brief Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of a permanent magnet coupling.

[0014] Figure 2 It is a schematic structural diagram of an arc-shaped plate.

[0015] Figure 3 It is an assembly schematic diagram of the anti-overheating deformation structure of the conductor wheel coupling ring of the permanent magnet coupling on the conductor disc.

[0016] The markings in the figure are: The markings in the figure are: 1 - input side hub, 2 - drive disc, 3 - outer steel ring, 4 - inner steel ring, 5 - magnet ring, 6 - inner circular arc plate, 7 - outer circular arc plate, 8 - heat sink, 9 - flow guide cover, 10 - front disc, 11 - blade, 12 - rear disc, 13 - permanent magnet, 14 - output side hub, 15 - flow guide plate, 16 - symmetry center line, 17 - circular through hole, 18 - long waist-shaped through hole, 19 - hexagon socket head cap screw, 20 - expansion joint. Detailed Description of the Preferred Embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] As Figures 1 to 3 shown, an anti-overheating deformation structure of a conductor wheel coupling ring of a permanent magnet coupling includes an input side hub, a conductor wheel, an output side hub, and a magnet wheel. The conductor wheel is composed of an outer steel ring 3 and an inner steel ring 4 connected to the drive disc 2. Coupling rings are installed on the inner circle of the outer steel ring 3 and the outer circle of the inner steel ring 4. The coupling ring is composed of arc-shaped plates 6 evenly divided into several segments within the circumference. A number of through holes with equal quantity are evenly distributed on and on both sides of the symmetry center line of the arc-shaped plate 6. The central through hole 17 on the symmetry center line is a standard circle, and the two side through holes 18 on both sides of the symmetry center line are long waist-shaped in the circumferential direction and are respectively fixed to the inner circle of the outer steel ring 3 and the outer circle of the inner steel ring 4 by hexagon socket head cap screws. A certain width of expansion joint 20 is left between adjacent arc-shaped plates to avoid deformation caused by mutual pushing due to thermal expansion.

[0019] The magnet wheel includes a permanent magnet 13 and a magnet ring 5. The permanent magnet 13 is assembled in the magnet slot of the magnet ring 5. At the same time, the magnet ring 5 is rigidly connected to the output-side hub 14. When the motor drives the input-side hub and the conductor wheel to rotate, the coupling ring on the conductor wheel rotates together. When the permanent magnet coupling starts with load, operates under heavy load or overload, a strong eddy current will be generated when the coupling ring cuts the magnetic force lines, and a large amount of heat will be released. After the arc-shaped plate is heated and expands, it will elongate in the circumferential direction. Since the arc-shaped plate is installed in sections and is designed with a thermal expansion joint 20 and a long waist-shaped through hole 18, problems such as the coupling ring bulging due to thermal expansion deformation are avoided, thus realizing the anti-thermal deformation function of the conductor wheel coupling ring of the permanent magnet coupling.

[0020] The material of the coupling ring is high-purity T2 copper. The material of the magnet wheel is mainly non-magnetized aluminum material, and its steel disc material is made of magnetizable steel.

[0021] The working principle of the present invention: When starting, power is provided by the motor to drive the conductor wheel to rotate. Under the magnetic field coupling of the conductor wheel and the magnet wheel, the magnet wheel is driven to rotate. The magnet wheel provides the torque required for load operation. When the permanent magnet coupling starts with load, operates under heavy load or overload, a large amount of heat will be released. To prevent equipment accidents caused by the coupling ring deforming due to high temperature, a structure for preventing overheating deformation of the conductor wheel coupling ring of the permanent magnet coupling is invented. In this structure, the coupling ring is composed of arc-shaped plates evenly divided into several sections within the circumference. A certain number of through holes with equal quantity are evenly distributed on the symmetry center line of the arc-shaped plate and on both sides of it. The through holes on the symmetry center line are standard circles, and the through holes on both sides of the symmetry center line are long waist-shaped in the circumferential direction and are respectively fixed to the inner circle of the outer steel ring and the outer circle of the outer steel ring by hexagon socket head cap screws. There is a certain width of expansion joint between the segmented arc-shaped plates to avoid deformation caused by mutual pushing due to thermal expansion. When the motor drives the input-side hub and the conductor wheel to rotate, the coupling ring on the conductor wheel rotates together. When the permanent magnet coupling starts with load, operates under heavy load or overload, a strong eddy current will be generated when the coupling ring cuts the magnetic force lines, and a large amount of heat will be released. After the arc-shaped plate is heated and expands, it will elongate in the circumferential direction. Since the arc-shaped plate is installed in sections and is designed with a thermal expansion joint and long waist-shaped mounting holes, problems such as the arc-shaped plate bulging, deforming, interfering and rubbing due to thermal expansion are eliminated, thus realizing the anti-thermal deformation function of the conductor wheel coupling ring of the permanent magnet coupling, avoiding equipment accidents caused by the coupling ring deforming at high temperature when the permanent magnet coupling starts with load, operates under heavy load or overload, improving the allowable operating temperature of the permanent magnet coupling, and increasing the service life of the permanent magnet coupling.

[0022] The magnet wheel consists of a magnet wheel and permanent magnets evenly distributed in the magnet slots of the magnet wheel. When the motor drives the input-side hub and the conductor wheel to rotate, the coupling ring on the conductor wheel rotates together. When the permanent magnet coupling starts with load, operates under heavy load or overload, a strong eddy current will be generated when the coupling ring cuts the magnetic force lines and a large amount of heat will be released. After the arc-shaped plate is heated and expands, it will elongate in the circumferential direction. Since the arc-shaped plate is installed in segments and is designed with thermal expansion joints and long waist-shaped mounting holes, problems such as the arc-shaped plate bulging and deforming due to thermal expansion and interference friction are eliminated, thus realizing the function of preventing thermal deformation of the coupling ring of the conductor wheel of the permanent magnet coupling, avoiding equipment accidents caused by the high-temperature deformation of the coupling ring when the permanent magnet coupling starts with load, operates under heavy load or overload, improving the allowable operating temperature of the permanent magnet coupling, and increasing the service life of the permanent magnet coupling.

[0023] The above shows and describes the basic principles, main features and advantages of the present invention. Those of ordinary skill in the art should understand that the above embodiments do not limit the protection scope of the present invention in any form. Any technical solutions obtained by means of equivalent replacement and the like fall within the protection scope of the present invention. The parts not involved in the present invention are the same as the prior art or can be realized by the prior art.

Claims

1. A permanent magnetic coupling conductor wheel coupling ring overheat deformation prevention structure, comprising an input side hub, a conductor wheel, an output side hub and a magnet wheel, wherein the conductor wheel comprises an outer steel ring (3) and an inner steel ring (4) connected to a transmission disc (2), characterized in that: Coupling rings are respectively installed on the inner circle of the outer steel ring (3) and the outer circle of the inner steel ring (4). The coupling rings are composed of an arc plate (6) evenly divided into a plurality of sections in the circumferential direction. A plurality of through holes of equal number are evenly distributed on the symmetry center line (16) and on both sides of each arc plate. The through holes on the symmetry center line (16) are standard circular through holes (17), and the through holes on both sides of the symmetry center line (16) are long waist-shaped through holes (18) along the circumferential direction.

2. The overheat deformation prevention structure of the conductor wheel coupling ring of a permanent magnetic coupling according to claim 1 is characterized in that: An expansion joint (20) of a certain width is left between adjacent arc-shaped plates (6) to prevent them from lifting up and deforming due to thermal expansion.

3. The overheat deformation prevention structure of the conductor wheel coupling ring of a permanent magnetic coupling according to claim 1 is characterized in that: The long waist-shaped holes are fixed on the inner circle of the outer steel ring (3) and the outer circle of the outer steel ring (4) respectively by hexagonal countersunk screws (19).

4. The overheat deformation prevention structure of the conductor wheel coupling ring of a permanent magnetic coupling according to claim 1 is characterized in that: The magnet wheel comprises a permanent magnet (13) and a magnet ring (5). The permanent magnet (13) is mounted in a magnet slot of the magnet ring (5). The magnet ring (5) is rigidly connected to the output side hub (14). When the drive shaft drives the input side hub (1) and the conductor wheel to rotate, the coupling ring rotates accordingly and performs a cutting magnetic force movement in the magnetic field of the magnet wheel. The input side torque is transmitted to the output side load shaft through the output side hub (14) through magnetic field coupling, thereby driving the load to rotate.

5. The overheat deformation prevention structure of the conductor wheel coupling ring of a permanent magnetic coupling according to claim 4 is characterized in that: The permanent magnets (13) are evenly distributed and embedded in the magnet ring (5) in a manner of different polarity layouts along the circumferential direction of the magnet ring (5).

6. The overheat deformation prevention structure of the conductor wheel coupling ring of a permanent magnetic coupling according to claim 1 is characterized in that: The outer end of the transmission disc (2) is rigidly connected to the input side wheel hub (1).

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