CN217087690U - Air-cooled explosion-proof permanent magnet direct-drive roller structure - Google Patents
Air-cooled explosion-proof permanent magnet direct-drive roller structure Download PDFInfo
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- CN217087690U CN217087690U CN202220939988.8U CN202220939988U CN217087690U CN 217087690 U CN217087690 U CN 217087690U CN 202220939988 U CN202220939988 U CN 202220939988U CN 217087690 U CN217087690 U CN 217087690U
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Abstract
An air-cooled flame-proof type permanent magnet direct-drive roller structure belongs to the technical field of permanent magnet motors. The air-cooled flame-proof type permanent magnet direct-drive roller structure comprises an air duct, wherein the air duct comprises a cylinder and an axial ventilation disc fixedly arranged on the inner wall of the cylinder, an air inlet hole is formed in the end face of one end of the cylinder, an air guide hole is formed in the axial ventilation disc, a plurality of heat dissipation ribs are arranged on the inner wall of the cylinder, a stator shaft is fixedly arranged on the inner side of the air duct, an in-shaft main ventilation hole and an in-shaft branch ventilation hole are formed in the stator shaft, a stator core is fixedly arranged on the outer side of the air duct, a stator coil is arranged on the stator core, a rotor sleeve is further arranged on the outer side of the air duct, an end cover is fixedly arranged at the end of the rotor sleeve, the end cover is rotatably connected with the air duct through a rolling bearing, and magnetic steel is fixedly arranged on the inner wall of the rotor sleeve. The air-cooled explosion-proof permanent magnet direct-drive roller structure can improve the heat dissipation efficiency, enhance the structural reliability, save the space, reduce the cost and has a good explosion-proof effect.
Description
Technical Field
The utility model relates to a permanent-magnet machine technical field, in particular to forced air cooling flame proof type permanent magnetism directly drives cylinder structure.
Background
The permanent-magnet direct-drive drum is a power transmission component in which the functions of motor and speed reducer are placed in the driving drum of belt conveyer together, and is characterized by small volume, compact structure, low cost, convenient use, stable operation and reliable operation, and is suitable for operation under various severe environmental conditions.
The permanent magnet direct-drive roller motor is characterized in that a roller shaft is fixed and is equivalent to a stator part of the motor, a stator iron core is laminated and fixed on the shaft through silicon steel sheets, a stator winding is embedded in the stator iron core, and when the stator winding passes through three-phase symmetrical alternating current, a rotating magnetic field can be generated. The cylinder surface of the roller is equivalent to the rotor part of the motor, the permanent magnet is attached to the inner surface of the roller, a permanent static magnetic field is generated, after the stator winding is introduced with symmetrical three-phase alternating current, the rotor magnetic field rotates along with the rotation of the stator magnetic field, and the roller starts to work.
At present, the cooling mode of the permanent magnet roller is mostly of a water-cooling type, the process is complex, the water leakage phenomenon is easy to occur, the electrical fault inside the roller is caused, and the water-cooling type permanent magnet roller needs a matched cooling water system on site, so that the use cost is increased. The permanent magnet roller can be used in a plurality of working occasions, such as non-explosion-proof places of cement plants, steel plants and the like, and can also be used in explosion-proof places of coal mines and the like. When the surrounding environment is an explosion-proof place, the permanent-magnet direct-drive roller needs to be correspondingly designed on the mechanical structure and the electrical structure according to the requirements of explosion-proof standards. When the permanent-magnet direct-drive roller cooling mode adopts a water-cooling mode, the joint of the cooling water pipe and the stator shaft needs to adopt a threaded explosion-proof surface, and the threads can have the possibility of explosion-proof failure after the cooling water is eroded for a long time. Except the screw explosion-proof surface, the cooling water path of the water-cooling roller is also possible to be corroded, so that the heat dissipation capability is reduced, the normal use of equipment is influenced, and the air-cooling roller does not have the problem.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem that prior art exists, the utility model provides an air-cooled flame-proof type permanent magnetism directly drives cylinder structure, it can improve radiating efficiency, reinforcing structure reliability, practice thrift space, reduce cost to have good flame proof effect.
In order to realize the purpose, the technical scheme of the utility model is that:
an air-cooled flame-proof type permanent magnet direct-drive roller structure comprises an air duct, wherein the air duct comprises a cylinder and an axial ventilation disc fixedly arranged on the inner wall of the cylinder, a plurality of air inlet holes are formed in the end face of one end of the cylinder, a plurality of air guide holes are formed in the axial ventilation disc, and a plurality of heat dissipation ribs are arranged on the inner wall of the cylinder;
a stator shaft is fixedly arranged on the inner side of the air guide cylinder, an in-shaft main vent hole is formed in the middle of one end, far away from the air inlet hole, of the stator shaft, and the in-shaft main vent hole is communicated with the inside of the air guide cylinder through a plurality of obliquely arranged in-shaft branch vent holes;
a stator core is fixedly arranged on the outer side of the air duct, and is provided with a stator coil;
the outer side of the air duct is further provided with a rotor sleeve, an end cover is fixedly arranged at the end of the rotor sleeve, the end cover is rotatably connected with the air duct through a rolling bearing, and magnetic steel is fixed on the inner wall of the rotor sleeve.
Furthermore, one end of the stator shaft, which is far away from the main ventilation hole in the shaft, is connected with the coil junction box through a connecting seat, the coil junction box is connected with the stator coil through a stator lead wire, and the stator lead wire penetrates through the air duct and the stator shaft.
Furthermore, an annular bulge is fixedly arranged on the inner wall of the end cover, and a gap is formed between the annular bulge and the inner wall of the rotor sleeve; the rolling bearing is provided with an inner cover, and a gap is formed between the inner cover and the outer wall of the air guide cylinder; the outer wall of one side of the connecting seat is provided with a circular groove, the end surface of the stator shaft is fixedly connected with the bottom surface of the circular groove, and a gap is formed between the outer wall of the stator shaft and the inner wall of the circular groove; the connecting seat is connected with the coil junction box through a bolt; the box body of the coil junction box is connected with the box cover through a bolt; the joint of the stator lead wire and the air duct and the joint of the stator lead wire and the stator shaft are all processed by sealing glue.
Further, the stator shaft is fixed to the drum support.
Furthermore, the end of the stator shaft, which is provided with the main ventilation hole in the shaft, is provided with a fan, and the fan is installed on the roller support.
Further, the outer wall of the rotor sleeve is cast with glue.
Furthermore, the stator core is formed by laminating punching sheets.
The utility model has the advantages that:
1) the utility model adopts the air cooling type as the cooling mode, thereby avoiding the possibility of the reduction of the insulation value of the electrical element caused by the cooling water entering the cylinder, saving the cooling water supply system, saving the space and reducing the equipment fund and the maintenance cost;
2) the air-cooled air path of the utility model adopts the form of air exhaust from the fan end, air enters the air guide cylinder from the air inlet hole, and the heat dissipation ribs for increasing the heat dissipation area are welded on the inner wall of the air guide cylinder, so that the heat dissipation efficiency can be improved and the structural reliability can be enhanced; the cooling air after heat exchange with the stator core is discharged into the environment through the fan, the air is everywhere in the use space and is used as a cooling medium, so that the cooling cost can be greatly reduced, the permanent magnet roller is convenient to mount and arrange, and the cooling air is a renewable and environment-friendly cooling medium;
3) when the environment around the permanent magnet roller is an explosion-proof place, the cooling mode of the permanent magnet direct-drive roller adopts an air cooling mode, a cooling water pipe is removed, and the explosion-proof mode only needs to adopt a gap explosion-proof surface and a sealing glue explosion-proof surface, so that the reliability and the safety of a product are greatly improved, the condition that the explosion-proof is invalid when the water cooling mode is adopted is avoided, and the problem that the existing air cooling roller does not have the explosion-proof effect is solved.
Additional features and advantages of the invention will be set forth in part in the detailed description which follows.
Drawings
FIG. 1 is a schematic structural diagram of an air-cooled flame-proof permanent-magnet direct-drive drum structure provided by an embodiment of the present invention;
fig. 2 is a ventilation and cooling air path diagram of an air-cooling flame-proof permanent-magnet direct-drive drum structure provided by the embodiment of the utility model;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
fig. 4 is a schematic structural diagram of an axial ventilation disk according to an embodiment of the present invention.
Reference numerals in the drawings of the specification include:
1-a fan, 2-a roller support, 3-an end cover, 4-a rolling bearing, 5-a rotor sleeve, 6-magnetic steel, 7-a stator core, 8-a stator coil, 9-an air duct, 10-a stator shaft, 11-a coil junction box, 12-a connecting seat, 13-a stator lead wire, 14-a heat dissipation rib, 15-an axial ventilation disc, 16-an air inlet, 17-an air guide hole, 18-an in-shaft branch ventilation hole and 19-an in-shaft main ventilation hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In order to solve the problems in the prior art, as shown in fig. 1 to 4, the utility model provides an air-cooled flame-proof type permanent magnet direct-drive drum structure, which comprises an air duct 9, wherein the air duct 9 comprises a cylinder and an axial ventilation disc 15 fixedly arranged on the inner wall of the cylinder, the end surface of one end of the cylinder is provided with a plurality of air inlet holes 16, the axial ventilation disc 15 is provided with a plurality of air guide holes 17, and the inner wall of the cylinder is provided with a plurality of heat dissipation ribs 14;
a stator shaft 10 is fixedly arranged on the inner side of the air guide cylinder 9, an in-shaft main vent hole 19 is arranged in the middle of one end, far away from the air inlet hole 16, of the stator shaft 10, the in-shaft main vent hole 19 is communicated with the inside of the air guide cylinder 9 through a plurality of in-shaft branch vent holes 18 which are obliquely arranged, air in the external environment enters the air guide cylinder 9 through the air inlet hole 16 of the air guide cylinder 9, then moves towards the air guide hole 17 of the axial ventilation disc 15 to dissipate heat, and finally is discharged into the environment through the in-shaft branch vent holes 18 of the stator shaft 10 and the in-shaft main vent hole 19;
a stator iron core 7 is fixedly arranged on the outer side of the air duct 9, and the stator iron core 7 is provided with a stator coil 8;
the outer side of the air duct 9 is further provided with a rotor sleeve 5, the end part of the rotor sleeve 5 is fixedly provided with an end cover 3, the end cover 3 is rotatably connected with the air duct 9 through a rolling bearing 4, the inner wall of the rotor sleeve 5 is fixedly provided with a magnetic steel 6, and after a stator coil 8 is electrified, the rotor roller, the end cover 3 and the magnetic steel 6 rotate.
In this embodiment, the air duct 9 is fixed to the stator shaft 10, and preferably, the air duct 9 is coupled to the stator shaft 10 by interference fit. The stator core 7 is fixed to the air duct 9, and preferably, the stator core 7 and the air duct 9 are coupled by interference fit. The axial ventilation disk 15 and the heat dissipation ribs 14 are firmly welded and fixed with the inner wall of the cylinder. The stator shaft 10 is provided with holes at the end part only, so that the working stability is ensured, the resistance can be reduced through the main ventilation hole 19 in the shaft and the branch ventilation holes 18 in the shaft which are obliquely arranged, the wind speed is stabilized, and the heat dissipation effect is improved.
Furthermore, one end of the stator shaft 10, which is far away from the main ventilation hole 19 in the shaft, is connected with the coil junction box 11 through the connecting seat 12, the coil junction box 11 is connected with the stator coil 8 through the stator lead wire 13, the stator lead wire 13 penetrates through the air duct 9 and the stator shaft 10 and is used for electrifying the stator coil 8, and when three-phase current is introduced into a three-phase symmetrical winding of the stator, magnetomotive force generated by the current is synthesized into rotary magnetomotive force with unchanged amplitude. Because the amplitude of the rotating magnetomotive force is not changed, the track of the rotating magnetomotive force forms a circle to become a circular rotating magnetomotive force. Because the rotating speed of the permanent magnet roller is constant to be synchronous, the main magnetic field of the rotor and the rotating magnetic field generated by the circular rotating magnetomotive force of the stator keep relatively static. The interaction of the two magnetic fields forms a resultant magnetic field in the air gap between the stator and the rotor, which interacts with the primary magnetic field of the rotor to produce an electromagnetic torque that urges the drum to rotate.
Further, an annular bulge is fixedly arranged on the inner wall of the end cover 3, and a gap is formed between the annular bulge and the inner wall of the rotor sleeve 5; the rolling bearing 4 is provided with an inner cover, and a gap is arranged between the inner cover and the outer wall of the air duct 9; a circular groove is formed in the outer wall of one side of the connecting seat 12, the end face of the stator shaft 10 is fixedly connected with the bottom face of the circular groove, and a gap is formed between the outer wall of the stator shaft 10 and the inner wall of the circular groove; the connecting seat 12 is connected with the coil junction box 11 through a bolt; the box body of the coil junction box 11 is connected with the box cover through a bolt; the joint of the stator lead wire 13 and the air duct 9 and the joint of the stator lead wire 13 and the stator shaft 10 are all processed by glue sealing.
In this embodiment, as shown in fig. 1, a gap is provided between the annular protrusion on the inner wall of the end cover 3 and the inner wall of the rotor sleeve 5, that is, a cylindrical gap explosion-proof surface a is adopted between the end cover 3 and the rotor sleeve 5; a gap is arranged between the inner cover of the rolling bearing 4 and the outer wall of the air duct 9, namely a cylindrical gap explosion-proof surface B is adopted between the rolling bearing 4 and the air duct 9; a gap is arranged between the inner wall of the circular groove of the connecting seat 12 and the outer wall of the stator shaft 10, namely a cylindrical gap explosion-proof surface E is adopted between the stator shaft 10 and the connecting seat 12; connecting seat 12 is connected with coil junction box 11 through a bolt, namely, a plane gap explosion-proof surface F is adopted between connecting seat 12 and junction box 11; the box body of the coil junction box 11 is connected with the box cover through a bolt, namely a cylindrical gap explosion-proof surface G is adopted between the junction box and the environment; the joint of the stator lead wire 13 and the air duct 9 is treated by sealing glue, namely a sealing glue explosion-proof surface C is adopted between the stator lead wire 13 and the air duct 9; the joint of the stator lead wire 13 and the stator shaft 10 is processed by sealing glue, namely a sealing glue explosion-proof surface D is arranged between the stator lead wire 13 and the stator shaft 10. In the explosion-proof surfaces, the explosion-proof surface A, B, E, F, G is protected by an explosion-proof shell d, and the principle is that explosion is prevented by controlling the minimum width and the maximum gap size of a joint surface; the flame-proof surface C, D is protected by a casting seal m, and the principle is that the gap of the joint surface is sealed for flame-proof. In addition, antifriction bearing 4 adopts prior art, and antifriction bearing 4 cooperation inner cup and enclosing cover use also adopts prior art when the installation, and this application has only carried out the flame proof setting between antifriction bearing 4 inner cup and air duct 9 outer wall. Connecting seat 12 is rectangle cavity structures, coil terminal box 11 adopts the structure of terminal box among the prior art, this application has only set up the connected mode of the box body of terminal box and lid, because the contact surface of connecting seat 12 and coil terminal box 11 and the contact surface of box body and lid all have the roughness, therefore, adopt bolted connection's mode, can not have gapless laminating between the contact surface of messenger connecting seat 12 and coil terminal box 11 and the contact surface of box body and lid, reach the effect that the required size of flame proof faying face made it have the flame proof.
In this embodiment, the stator shaft 10 is fixed to the roller holder 2, and the roller holder 2 is connected to a bracket of the belt conveyor when in use.
In this embodiment, the fan 1 is disposed at the end of the stator shaft 10 where the shaft main vent 19 is disposed, and the fan 1 is mounted on the roller support 2.
In this embodiment, the outer wall of the rotor sleeve 5 is cast with glue to improve the friction between the outer wall of the rotor sleeve 5 and the belt.
In this embodiment, the stator core 7 is formed by laminating punching sheets to reduce iron loss generated during operation, the stator coil 8 is embedded in the punching sheet slot, and the stator core 7 and the manner of arranging the stator coil 8 can adopt the prior art.
The utility model relates to a forced air cooling flame proof type permanent magnetism directly drives drum structure's theory of operation:
the permanent-magnet direct-drive roller is generally a power roller of a belt conveyor, an asynchronous motor provides power for the roller through a speed reducer to enable the belt conveyor to run, the permanent-magnet direct-drive roller directly changes the power roller into a permanent-magnet synchronous motor, the speed reducer is omitted, maintenance amount is greatly reduced, and the rotating speed is convenient to adjust;
as shown in fig. 2, before the permanent magnet drum stator coil 8 is energized, the fan 1 is turned on to generate a cooling loop, cooling air enters the air duct 9 from the environment around the drum through the air inlet hole 16, enters the in-shaft branch vent hole 18 and the in-shaft main vent hole 19 of the stator shaft 10 after passing through the air duct 9, and is discharged into the environment through the fan 1; when the air path is smooth, the current is introduced into the roller stator coil 8 to enable the roller to start to operate, the roller in the working state can generate heat, and when the heat is transferred to the inner wall of the air duct 9, the cooling air in the air duct 9 blows the inner surface of the air duct 9 to discharge the heat to the environment outside the roller along with the cooling air, so that the cooling air has the effect of reducing the temperature of the roller.
When the air-cooled type is adopted as the cooling mode, the possibility of reduction of the insulation value of the electrical element caused by the fact that cooling water enters the cylinder is avoided, a cooling water supply system is omitted, the space is saved, and the equipment fund and the maintenance cost are reduced; the air-cooled air path adopts a mode of exhausting air from the end of the fan 1, air enters the air guide cylinder 9 from the air inlet hole 16, and the inner wall of the air guide cylinder 9 is welded with the heat dissipation ribs 14 for increasing the heat dissipation area, so that the heat dissipation efficiency can be improved and the structural reliability can be enhanced; the cooling air after heat exchange with the stator iron core 7 is discharged to the environment through the fan 1, the air is everywhere in the use space, and the cooling air is used as a cooling medium, so that the cooling cost can be greatly reduced, the permanent magnet roller is convenient to mount and arrange, and the cooling air is also a renewable and environment-friendly cooling medium.
The application adopts the mode flame-proof of clearance flame-proof face and glue sealing flame-proof face, has improved reliability and the security of product greatly. While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. The air-cooled flame-proof type permanent magnet direct-drive roller structure is characterized by comprising an air duct, wherein the air duct comprises a cylinder and an axial ventilation disc fixedly arranged on the inner wall of the cylinder, a plurality of air inlet holes are formed in the end face of one end of the cylinder, a plurality of air guide holes are formed in the axial ventilation disc, and a plurality of heat dissipation ribs are arranged on the inner wall of the cylinder;
a stator shaft is fixedly arranged on the inner side of the air guide cylinder, an in-shaft main vent hole is formed in the middle of one end, far away from the air inlet hole, of the stator shaft, and the in-shaft main vent hole is communicated with the inside of the air guide cylinder through a plurality of obliquely arranged in-shaft branch vent holes;
a stator core is fixedly arranged on the outer side of the air duct, and is provided with a stator coil;
the outer side of the air duct is further provided with a rotor sleeve, an end cover is fixedly arranged at the end of the rotor sleeve, the end cover is rotatably connected with the air duct through a rolling bearing, and magnetic steel is fixed on the inner wall of the rotor sleeve.
2. The air-cooled flame-proof type permanent-magnet direct-drive roller structure as claimed in claim 1, wherein one end of the stator shaft, which is far away from the main ventilation hole in the shaft, is connected with a coil junction box through a connecting seat, the coil junction box is connected with a stator coil through a stator lead wire, and the stator lead wire penetrates through the air guide cylinder and the stator shaft.
3. The air-cooled flameproof permanent-magnet direct-drive roller structure according to claim 2, wherein an annular bulge is fixedly arranged on the inner wall of the end cover, and a gap is arranged between the annular bulge and the inner wall of the rotor sleeve; the rolling bearing is provided with an inner cover, and a gap is formed between the inner cover and the outer wall of the air guide cylinder; the outer wall of one side of the connecting seat is provided with a circular groove, the end surface of the stator shaft is fixedly connected with the bottom surface of the circular groove, and a gap is formed between the outer wall of the stator shaft and the inner wall of the circular groove; the connecting seat is connected with the coil junction box through a bolt; the box body of the coil junction box is connected with the box cover through a bolt; the joint of the stator lead wire and the air duct and the joint of the stator lead wire and the stator shaft are all processed by sealing glue.
4. The air-cooled flameproof permanent-magnet direct-drive roller structure according to any of claims 1 to 3, wherein the stator shaft is fixed to the roller support.
5. The air-cooled flameproof permanent-magnet direct-drive roller structure according to any of claims 1 to 3, wherein a fan is arranged at one end of the stator shaft, which is provided with the main ventilation hole in the shaft, and the fan is mounted on the roller support.
6. The air-cooled flameproof permanent-magnet direct-drive roller structure according to any of claims 1 to 3, wherein the outer wall of the rotor sleeve is cast with glue.
7. The air-cooled flameproof permanent-magnet direct-drive roller structure according to any of claims 1 to 3, wherein the stator core is formed by lamination of punching sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220939988.8U CN217087690U (en) | 2022-04-22 | 2022-04-22 | Air-cooled explosion-proof permanent magnet direct-drive roller structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220939988.8U CN217087690U (en) | 2022-04-22 | 2022-04-22 | Air-cooled explosion-proof permanent magnet direct-drive roller structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217087690U true CN217087690U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220939988.8U Active CN217087690U (en) | 2022-04-22 | 2022-04-22 | Air-cooled explosion-proof permanent magnet direct-drive roller structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217087690U (en) |
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2022
- 2022-04-22 CN CN202220939988.8U patent/CN217087690U/en active Active
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