A dual-rotor permanent magnet synchronous motor for mining fans

Abstract

The invention discloses a dual-rotor permanent magnet synchronous motor for a mining fan, which relates to the technical field of permanent magnet motors, and comprises a main body, a shell is arranged at the end of the main body, a support column is arranged in the inner cavity of the shell, and a limit assembly is arranged at the lower end of the support column; the dual-rotor permanent magnet synchronous motor for the mining fan, when the sleeve moves, synchronously drives an adjustment plate arranged on the outer surface thereof to move, because a conical block is arranged at the end of the adjustment plate, the conical block moves with the adjustment plate, and then cooperates with the guide groove to drive the ring for adjustment, so that it is suitable for different scenes; when the main body is running, due to its high speed and strong load, large mechanical vibration and noise may be generated, especially in an environment such as a mine, the noise of the fan will affect the workers, so the ring is cooperated to limit the centering of the drive shaft to ensure the accuracy of the centering, and the protection assembly is cooperated to synchronously limit the drive shaft during the subsequent emergency stop.

Description

Technical Field

[0001] The invention relates to permanent magnet motor technology, and in particular to a dual-rotor permanent magnet synchronous motor for a mining fan. Background Art

[0002] Permanent magnet motor is the earliest motor to appear and be applied. Because of its good starting performance, braking performance and speed regulation performance, and its ability to respond quickly, it has been widely used in industrial automation, mechanical equipment, transportation, aviation kinetic energy and other fields. The earliest low-speed permanent magnet motor is composed of analog circuits, digital circuits, operational amplifiers and nonlinear circuits. Since the motor will generate a lot of internal heat during operation, the operating temperature of the low-speed permanent magnet motor will continue to rise, which will cause the loss of motor components and shorten the service life of the motor. The permanent magnet synchronous motor is composed of components such as the stator, rotor and housing. The permanent magnet synchronous motor uses permanent magnets to provide excitation, which makes the motor structure simpler, reduces the processing and assembly costs, and eliminates the collector rings and brushes that are prone to problems, which improves the reliability of the motor operation; and because no excitation current is required, there is no excitation loss, which improves the efficiency and power density of the motor.

[0003] When the existing equipment is in use, there is a back-EMF waveform. The back-EMF harmonic components caused by the stator slots and the discontinuity of the rotor permanent magnets cause additional iron loss, copper loss and vibration noise when the motor is running, reducing the efficiency and performance of the motor; at the same time, during the operation, if an emergency occurs, it cannot be stopped in time, which leads to accidents. Therefore, a dual-rotor permanent magnet synchronous motor for a mining fan has been developed. Summary of the invention

[0004] The object of the present invention is to provide a dual-rotor permanent magnet synchronous motor for a mining fan to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solution: a dual-rotor permanent magnet synchronous motor for a mining fan, comprising a main body, a shell is provided at the end of the main body, a support column is provided in the inner cavity of the shell, and a limit assembly is provided at the lower end of the support column, and the motor drive shaft is limited by the limit assembly during maintenance;

[0006] Wherein, the limit assembly comprises a bottom plate connected to the support column, a crankshaft is rotatably mounted on the upper end of the bottom plate through a positioning block, and both ends of the crankshaft are provided with rotating blocks, and the outer surfaces of the two rotating blocks are provided with opposite arc grooves;

[0007] A sleeve is slidably mounted on the outer surface of the rotating block, a convex block is provided on the inner wall of the sleeve, and the outer surface of the convex block is slidably connected to the inner wall of the arc-shaped groove;

[0008] The ends of the outer surfaces of the two sleeves that are away from each other are each provided with an adjustment plate, and the opposite ends of the two adjustment plates are each provided with a conical block, and the opposite ends of the two conical blocks are connected by a telescopic rod, and the outer surfaces of the conical blocks are provided with a guide groove, and the inner wall of the guide groove is slidably mounted with a ring;

[0009] The outer surface of the crankshaft is provided with a movable plate, and a groove is opened on one side of the movable plate, and the inner wall of the groove is slidably connected to the outer surface of the crankshaft, and movable blocks are provided at both ends of the movable plate, and a push rod is rotatably installed at one end of the movable block close to the crankshaft, and the end of the push rod is rotatably connected to the outer surface of the crankshaft;

[0010] A limit rod is rotatably mounted on the outer surface of the crankshaft, and a transmission block is rotatably mounted on one end of the limit rod away from the crankshaft, an elastic member is disposed at the end of the transmission block, and the end of the elastic member is connected to one side of the bottom plate;

[0011] A protection component is assembled on the upper end of the support column, and the motor drive shaft is limited to an emergency stop through the protection component.

[0012] As a further optimization solution of the present invention, the cross section of the bottom plate is concave, and a cylinder is provided on one side of the bottom plate, and the inner wall of the cylinder is slidably connected to the outer surface of the movable block.

[0013] As a further optimization solution of the present invention, the protection component includes a fixing plate connected to the support column, and guide plates are symmetrically arranged at the ends of the fixing plate.

[0014] As a further optimization solution of the present invention, a slider is slidably mounted on the outer surface of the guide plate, and a through hole is opened at the end of the slider.

[0015] As a further optimization solution of the present invention, a first gear plate is disposed on the inner wall of the through hole, and a second gear plate is disposed on the outer surface of the sliding block.

[0016] As a further optimization solution of the present invention, a first rotating shaft is rotatably mounted at the end of the fixing plate and located in the inner cavity of the through hole, and the outer surface of the first rotating shaft is meshed with the outer surface of the first gear plate.

[0017] As a further optimization solution of the present invention, a second rotating shaft is rotatably mounted at the end of the fixed plate and located on one side of the second gear plate, and the outer surface of the second rotating shaft is meshed with the outer surface of the second gear plate.

[0018] As a further optimization solution of the present invention, a driving member is provided at the end of the fixing plate, and an output end of the driving member is connected to the outer surface of the sliding block.

[0019] As a further optimization solution of the present invention, the lower end of the first rotating shaft and the lower end of the second rotating shaft are both provided with an arc plate, and the arc plate is located at the upper end of the motor drive shaft.

[0020] As a further optimization solution of the present invention, the first rotating shaft and the second rotating shaft are respectively located on two sides of the circular ring.

[0021] Compared with the prior art, the present invention provides a dual-rotor permanent magnet synchronous motor for a mining fan, which has the following beneficial effects: when the sleeve moves, the adjustment plate arranged on its outer surface is synchronously driven to move, and since a conical block is arranged at the end of the adjustment plate, the conical block moves with the adjustment plate, and then cooperates with the guide groove to drive the ring for adjustment, so that it is suitable for different scenarios; when the main body is running, due to its high speed and strong load, large mechanical vibration and noise may be generated, especially in an environment such as a mine, the noise of the fan will affect the workers, so the ring is cooperated to limit the centering of the drive shaft to ensure the accuracy of the centering, and cooperates with the protective component to limit the drive shaft during the subsequent emergency stop.

[0022] When the first rotating shaft and the second rotating shaft rotate, the arc plate arranged at their ends is synchronously driven to rotate, wherein the outer surface of the arc plate is provided with rubber and other anti-slip components, and when the arc plate rotates, the inner wall of the arc plate fits with the outer surface of the drive shaft, and at the same time cooperates with the circular ring to synchronously limit the drive shaft, so that the drive shaft stops at the fastest speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the structure of a limit assembly and a protection assembly provided in an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure of a limiter assembly provided in an embodiment of the present invention;

[0027] Figure 4 A first cross-sectional view of the internal structure of a position limiting assembly provided in an embodiment of the present invention;

[0028] Figure 5A second cross-sectional view of the internal structure of the limit assembly provided in an embodiment of the present invention;

[0029] Figure 6 A schematic diagram of the structure of a protection component provided in an embodiment of the present invention;

[0030] Figure 7 A first cross-sectional view of the protective assembly structure provided by an embodiment of the present invention;

[0031] Figure 8 A second cross-sectional view of the protective component structure provided in an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Main body; 2. Limiting assembly; 3. Protective assembly; 11. Shell; 12. Support column; 21. Bottom plate; 211. Cylinder; 22. Crankshaft; 23. Rotating block; 231. Arc groove; 24. Sleeve; 241. Bump; 25. Adjusting plate; 26. Conical block; 261. Guide groove; 27. Ring; 28. Movable plate; 281. Groove; 282. Movable block; 283. Push rod; 29. ​​Limiting rod; 291. Transmission block; 292. Elastic member; 31. Fixed plate; 32. Driving member; 33. Guide plate; 331. Sliding block; 34. First gear plate; 35. Through hole; 36. First rotating shaft; 37. Second gear plate; 38. Second rotating shaft; 39. Arc plate. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the 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.

[0035] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Example: See Figure 1-Figure 8 A dual-rotor permanent magnet synchronous motor for a mining fan includes a main body 1, a shell 11 is provided at the end of the main body 1, a support column 12 is provided in the inner cavity of the shell 11, and a limit assembly 2 is provided at the lower end of the support column 12, and the limit assembly 2 is used to limit the motor drive shaft during maintenance.

[0037] In this solution, the support column 12 is located on the inner wall of the shell 11, and is used to support the limit assembly 2. The limit assembly 2 is located at the lower end of the drive shaft. The drive shaft is supported during installation or maintenance by the limit assembly 2, thereby ensuring the stability of the drive shaft.

[0038] Furthermore, the limiting assembly 2 includes a base plate 21 connected to the support column 12, a crankshaft 22 is rotatably mounted on the upper end of the base plate 21 through a positioning block, and rotating blocks 23 are provided at both ends of the crankshaft 22, and the outer surfaces of the two rotating blocks 23 are provided with relative arc grooves 231.

[0039] In this embodiment, when the crankshaft 22 rotates, it is limited by the positioning block, so that the crankshaft 22 as a whole remains stable, and when the crankshaft 22 rotates, the rotating block 23 arranged at its end is synchronously driven to rotate.

[0040] Furthermore, a sleeve 24 is slidably mounted on the outer surface of the rotating block 23 , a protrusion 241 is provided on the inner wall of the sleeve 24 , and the outer surface of the protrusion 241 is slidably connected to the inner wall of the arc groove 231 .

[0041] Specifically, when the rotating block 23 rotates, the arc groove 231 provided on the outer surface thereof drives the protrusion 241 to move. Since the end of the protrusion 241 is connected to the inner wall of the sleeve 24, the sleeve 24 is moved.

[0042] Furthermore, an adjustment plate 25 is provided at one end of the outer surfaces of the two sleeves 24 that are away from each other, and a conical block 26 is provided at the opposite end of the two adjustment plates 25. At the same time, the opposite ends of the two conical blocks 26 are connected by a telescopic rod, and a guide groove 261 is provided on the outer surface of the conical block 26, and a ring 27 is slidably installed on the inner wall of the guide groove 261.

[0043] Specifically, when the sleeve 24 moves, the adjustment plate 25 arranged on its outer surface is synchronously driven to move. Since a conical block 26 is arranged at the end of the adjustment plate 25, the conical block 26 moves with the adjustment plate 25, and then cooperates with the guide groove 261 to drive the ring 27 to adjust, so that it is suitable for different scenarios.

[0044] When the main body 1 is running, due to its high speed and strong load, it may generate large mechanical vibration and noise, especially in an environment such as a mine, the noise of the fan will affect the workers, so the ring 27 is used to limit the centering of the drive shaft to ensure the accuracy of the centering, and the protection component 3 is used to limit the drive shaft during the subsequent emergency stop to ensure that the drive shaft stops at the fastest speed.

[0045] The outer surface of the ring 27 is provided with a component having an anti-slip function, such as rubber, so that after the inner wall of the ring 27 is in contact with the drive shaft, the friction between the inner wall of the ring 27 and the drive shaft is increased.

[0046] Furthermore, a movable plate 28 is provided on the outer surface of the crankshaft 22, and a groove 281 is opened on one side of the movable plate 28, and the inner wall of the groove 281 is slidably connected to the outer surface of the crankshaft 22. At the same time, movable blocks 282 are provided at both ends of the movable plate 28, and a push rod 283 is rotatably installed at one end of the movable block 282 close to the crankshaft 22, and the end of the push rod 283 is rotatably connected to the outer surface of the crankshaft 22.

[0047] Specifically, when the crankshaft 22 rotates, the push rod 283 pushes the movable block 282 to move. Since a groove 281 is provided on one side of the movable plate 28, the movable plate 28 will not be disturbed when moving.

[0048] A device with a telescopic function, such as an electric telescopic rod, may be provided at the end of the movable block 282 and connected to an external control device. The movable block 282 may be driven to move by the electric telescopic rod and cooperate with the push rod 283 to push the crankshaft 22 to rotate.

[0049] Furthermore, a limit rod 29 is rotatably installed on the outer surface of the crankshaft 22, and a transmission block 291 is rotatably installed on one end of the limit rod 29 away from the crankshaft 22. An elastic member 292 is provided at the end of the transmission block 291, and the end of the elastic member 292 is connected to one side of the base plate 21.

[0050] Specifically, the elastic member 292 is an elastic component such as a spring, which is used to support the transmission block 291. Since the transmission block 291 is connected to the limit rod 29, when the limit rod 29 moves, the elastic member 292 is squeezed, and after the squeezing is completed, the limit rod 29 is driven by the force of the elastic member 292 to push the crankshaft 22 to return to its initial position.

[0051] Furthermore, the cross section of the bottom plate 21 is concave, and a cylinder 211 is provided on one side of the bottom plate 21 , and the inner wall of the cylinder 211 is slidably connected to the outer surface of the movable block 282 .

[0052] Specifically, the movable block 282 is limited by the cylinder 211 to prevent the movable block 282 from falling off during movement, thereby ensuring overall stability.

[0053] Furthermore, the protection assembly 3 is mounted on the upper end of the support column 12, and the motor drive shaft is limited to an emergency stop through the protection assembly 3. The protection assembly 3 includes a fixing plate 31 connected to the support column 12, and a guide plate 33 is symmetrically arranged at the end of the fixing plate 31. A slider 331 is slidably mounted on the outer surface of the guide plate 33, and a through hole 35 is opened at the end of the slider 331.

[0054] In this embodiment, the cross section of the slider 331 is concave, and the two protruding ends are slidably connected to the outer surfaces of the two guide plates 33 respectively. The slider 331 is limited by the guide plates 33 to prevent the slider 331 from shaking when moving.

[0055] Furthermore, a first gear plate 34 is disposed on the inner wall of the through hole 35, and a second gear plate 37 is disposed on the outer surface of the slider 331. A first rotating shaft 36 is rotatably mounted on the end of the fixed plate 31 and located in the inner cavity of the through hole 35, and the outer surface of the first rotating shaft 36 is meshed with the outer surface of the first gear plate 34.

[0056] Specifically, when the slider 331 moves, the first gear plate 34 is synchronously driven to move. Since the first gear plate 34 is meshed with the outer surface of the first rotating shaft 36 , when the first gear plate 34 moves, the first rotating shaft 36 is driven to rotate.

[0057] Furthermore, a second rotating shaft 38 is rotatably mounted at the end of the fixing plate 31 and located on one side of the second gear plate 37 , and an outer surface of the second rotating shaft 38 is meshed with an outer surface of the second gear plate 37 .

[0058] Specifically, the second gear plate 37 disposed on the outer surface of the slider 331 moves synchronously with the slider 331 , thereby driving the second rotating shaft 38 meshing on the outer surface of the second gear plate 37 to rotate.

[0059] Furthermore, a driving member 32 is disposed at the end of the fixing plate 31 , and an output end of the driving member 32 is connected to an outer surface of the sliding block 331 .

[0060] Specifically, the driving member 32 is a device with a telescopic function such as an electric telescopic rod, and is connected to an external control device. When the driving member 32 is started, it synchronously drives the slider 331 arranged at its output end to move.

[0061] Furthermore, arc plates 39 are disposed at the lower ends of the first rotating shaft 36 and the second rotating shaft 38, and the arc plates 39 are located at the upper end of the motor drive shaft. The first rotating shaft 36 and the second rotating shaft 38 are located at both sides of the ring 27, respectively.

[0062] Specifically, when the first rotating shaft 36 and the second rotating shaft 38 rotate, the arc plate 39 arranged at their ends are synchronously driven to rotate, wherein the outer surface of the arc plate 39 is provided with rubber or other anti-slip components, and when the arc plate 39 rotates, the inner wall of the arc plate 39 fits with the outer surface of the drive shaft, and at the same time cooperates with the ring 27 to synchronously limit the drive shaft, so that the drive shaft stops at the fastest speed.

[0063] The control device can select a single-chip microcomputer as the control end. In this embodiment, the single-chip microcomputer is a typical embedded microcontroller (Microcontroller Unit), which is composed of an arithmetic unit, a controller, a memory, an input and output device, etc., which is equivalent to a microcomputer. Compared with the general-purpose microprocessor used in personal computers, it emphasizes self-supply (no external hardware) and cost saving. Its biggest advantage is that it is small in size and can be placed inside the instrument, but it has a small storage capacity, a simple input and output interface, and low functional consumption.

[0064] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A dual-rotor permanent magnet synchronous motor for a mining fan, characterized in that: It comprises a main body (1), a shell (11) is provided at the end of the main body (1), a support column (12) is provided in the inner cavity of the shell (11), a limit assembly (2) is provided at the lower end of the support column (12), and the limit assembly (2) is used to limit the motor drive shaft during maintenance; The limiting assembly (2) comprises a base plate (21) connected to the support column (12); a crankshaft (22) is rotatably mounted on the upper end of the base plate (21) via a positioning block; rotating blocks (23) are provided at both ends of the crankshaft (22); and the outer surfaces of the two rotating blocks (23) are provided with opposing arc grooves (231); A sleeve (24) is slidably mounted on the outer surface of the rotating block (23), a protrusion (241) is provided on the inner wall of the sleeve (24), and the outer surface of the protrusion (241) is slidably connected to the inner wall of the arc-shaped groove (231); An adjustment plate (25) is provided at one end of the outer surface of the two sleeves (24) away from each other, and a conical block (26) is provided at the opposite end of the two adjustment plates (25). The opposite ends of the two conical blocks (26) are connected by a telescopic rod, and a guide groove (261) is provided on the outer surface of the conical block (26), and a ring (27) is slidably mounted on the inner wall of the guide groove (261); A movable plate (28) is provided on the outer surface of the crankshaft (22), a groove (281) is provided on one side of the movable plate (28), an inner wall of the groove (281) is slidably connected to the outer surface of the crankshaft (22), movable blocks (282) are provided at both ends of the movable plate (28), a push rod (283) is rotatably mounted on one end of the movable block (282) close to the crankshaft (22), and an end of the push rod (283) is rotatably connected to the outer surface of the crankshaft (22); A limit rod (29) is rotatably mounted on the outer surface of the crankshaft (22); a transmission block (291) is rotatably mounted on one end of the limit rod (29) away from the crankshaft (22); an elastic member (292) is disposed at the end of the transmission block (291); and an end of the elastic member (292) is connected to one side of the bottom plate (21); The protection component (3) is used to limit the emergency stop of the motor drive shaft, and is assembled on the upper end of the support column (12). The protection component (3) comprises a fixing plate (31) connected to the support column (12), and a guide plate (33) is symmetrically provided at the end of the fixing plate (31). A slider (331) is slidably mounted on the outer surface of the guide plate (33), and a through hole (35) is opened at the end of the slider (331).

2. A dual-rotor permanent magnet synchronous motor for a mining fan according to claim 1, characterized in that: The cross section of the bottom plate (21) is concave, and a cylinder (211) is provided on one side of the bottom plate (21), and the inner wall of the cylinder (211) is slidably connected to the outer surface of the movable block (282).

3. A dual-rotor permanent magnet synchronous motor for a mining fan according to claim 1, characterized in that: A first gear plate (34) is provided on the inner wall of the through hole (35), and a second gear plate (37) is provided on the outer surface of the sliding block (331).

4. A dual-rotor permanent magnet synchronous motor for a mining fan according to claim 3, characterized in that: A first rotating shaft (36) is rotatably mounted at the end of the fixed plate (31) and located in the inner cavity of the through hole (35), and the outer surface of the first rotating shaft (36) is meshed with the outer surface of the first gear plate (34).

5. A dual-rotor permanent magnet synchronous motor for a mining fan according to claim 4, characterized in that: A second rotating shaft (38) is rotatably mounted at the end of the fixed plate (31) and located on one side of the second gear plate (37); the outer surface of the second rotating shaft (38) is meshed with the outer surface of the second gear plate (37).

6. A dual-rotor permanent magnet synchronous motor for a mining fan according to claim 5, characterized in that: A driving member (32) is provided at the end of the fixing plate (31), and an output end of the driving member (32) is connected to the outer surface of the sliding block (331).

7. A dual-rotor permanent magnet synchronous motor for a mining fan according to claim 6, characterized in that: The lower ends of the first rotating shaft (36) and the second rotating shaft (38) are both provided with an arc-shaped plate (39), and the arc-shaped plate (39) is located at the upper end of the motor drive shaft.

8. A dual-rotor permanent magnet synchronous motor for a mining fan according to claim 7, characterized in that: The first rotating shaft (36) and the second rotating shaft (38) are respectively located on two sides of the circular ring (27).

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