Mine hoist with built-in permanent magnet synchronous motor

Abstract

The utility model provides a permanent magnet synchronous motor built-in type mine hoist which comprises a main shaft, a driving part and a winding drum rotationally arranged on the driving part, the driving part is an outer rotor permanent magnet motor and comprises a stator arranged on the outer side of the main shaft and a rotor located on the outer side of the stator, the rotor is rotationally arranged on the main shaft, and the winding drum is composed of an upper half drum body and a lower half drum body. The upper half barrel body and the lower half barrel body are symmetrical about the central axis of the winding drum, the upper half barrel body and the lower half barrel body are detachably connected together and form a circular barrel-shaped structure after being in butt joint, an annular center plate is welded to the inner side of the winding drum, and the annular center plate is arranged on the rotor; the winding drum is designed into the mode that the upper half drum body and the lower half drum body are detachably connected, so that the manufacturing difficulty of the winding drum is greatly reduced, the portability of transportation, installation and maintenance is improved, and operation is more convenient and efficient.

Description

Technical Field

[0001] This utility model relates to the field of hoisting equipment technology, specifically to a mine hoist with a permanent magnet synchronous motor installed inside. Background Technology

[0002] A mine hoist is a primary transportation device in mining engineering that connects the underground environment with the surface. Installed on the surface, a mine hoist uses steel wire ropes to move a hoisting container along the shaft or inclined ramp. It is used for hoisting coal, ore, and gangue in vertical and inclined shafts, as well as for raising and lowering personnel, materials, tools, and equipment.

[0003] It can make mining operations more energy-efficient, efficient, and automated, greatly saving energy consumption, improving the safety, reliability, and energy efficiency of coal mining, and reducing the occurrence of safety accidents.

[0004] Traditional permanent magnet external rotor hoist drums have a solid circular structure. After the steel plate is rolled into a circle, the roundness error range cannot be guaranteed through effective machining. It can only rely on the precision of the plate rolling machine. Furthermore, the solid circular structure is more troublesome in terms of transportation and on-site installation. It cannot be effectively transported and installed in certain special fields or in situations with many special restrictions. Due to insufficient space for operation, the solid circular structure is also more inconvenient for on-site maintenance. Utility Model Content

[0005] In view of this, this utility model provides a permanent magnet synchronous motor-embedded mine hoist. By designing the drum as a two-part structure, it solves the problem that the traditional permanent magnet external rotor hoist drum is a whole circular structure. After the steel plate is rolled into a circle, the roundness error range cannot be guaranteed through effective machining. It can only rely on the precision of the plate rolling machine. Moreover, the whole circular structure is more troublesome in terms of transportation and on-site installation. It cannot be effectively transported and installed in some special fields or in situations with many special restrictions. Due to insufficient space for operation, the whole circular structure is also more inconvenient for on-site maintenance.

[0006] To solve the above-mentioned technical problems, this utility model provides a permanent magnet synchronous motor-installed mine hoist, including a main shaft, a drive unit, and a drum rotatably mounted on the drive unit. The drive unit is an external rotor permanent magnet motor, model JKN-4X3P, including a stator located outside the main shaft and a rotor located outside the stator. The rotor is rotatably mounted on the main shaft. The drum consists of an upper half and a lower half, which are symmetrical about the central axis of the drum. The upper and lower half are detachably connected together and form a circular cylindrical structure after docking. An annular flange is welded to the inner side of the drum and is mounted on the rotor. This utility model greatly reduces the difficulty of drum manufacturing by designing the upper and lower half of the drum to be detachably connected, improves the portability of transportation, installation, and maintenance, and makes operation more convenient and efficient.

[0007] A flange is welded to the outside of the rotor, and the annular web plate is detachably mounted on the flange by bolts. This utility model can achieve the rotation of the annular web plate and the drum connected to it by the rotation of the rotor by detachably mounting the annular web plate on the flange outside the rotor.

[0008] Bearings are also provided at both ends of the main shaft. The main shaft passes through the inner ring of the bearing and is interference-fitted with the inner ring of the bearing. An end cover is provided on the outside of the bearing. The end cover has a through hole that matches the outer ring of the bearing. The outer ring of the bearing is fixed to the inner wall of the through hole of the end cover. The end cover and the flange located on the same side are detachably connected to each other by bolts. This utility model can protect and seal the inner cavity of the stator through the end cover. Moreover, the end cover can be detachably set on the flange by the bolts, which facilitates convenient and efficient disassembly and installation, making the operation more convenient.

[0009] The bearing is equipped with sealing caps on both the inner and outer sides. A skeleton oil seal is installed in the gap between the inner side of the sealing cap and the inner ring of the bearing. The skeleton oil seal is made of fluororubber. The skeleton oil seal can effectively seal the bearing, prevent the leakage of lubricating oil, and greatly improve the service life of the bearing.

[0010] The drum has movable brake discs at both ends. The movable brake discs include an upper brake disc located on the outside of the upper half of the drum and a lower brake disc located on the outside of the lower half of the drum. The upper brake disc is detachably mounted on the outside of the upper half of the drum by bolts and nuts, and the lower brake disc is detachably mounted on the outside of the lower half of the drum by bolts and nuts. This utility model can stop the rotation of the drum by the movable brake discs, which greatly improves the speed at which the drum stops rotating and makes the operation safer.

[0011] A first connecting plate is provided on the inner side of the upper half of the cylinder, and a second connecting plate is provided on the inner side of the lower half of the cylinder. The first connecting plate and the second connecting plate are detached and connected together by bolts and nuts. This utility model can lock and fix the first connecting plate and the second connecting plate after the upper half of the cylinder and the lower half of the cylinder are connected by bolts and nuts, so as to realize the quick installation and fixing of the upper half of the cylinder and the lower half of the cylinder, which greatly improves the efficiency and stability of the assembly of the upper half of the cylinder and the lower half of the cylinder.

[0012] One end cover is also equipped with an encoder interface, which is a gear-connected encoder interface. The commissioning personnel can adjust it according to the user's needs. During the installation and commissioning phase, the phase angle of the external rotor permanent magnet synchronous motor can be adjusted through the encoder output signal to adjust the operating closed loop and improve the safety of equipment operation.

[0013] Multiple plastic liners can be installed on the outside of the drum via screws. Multiple rope grooves are opened on the plastic liners. A lifting rope, which is a steel wire rope, is wound on the plastic liners on the outside of the drum. The rope grooves on the plastic liners are adapted to the diameter of the steel wire rope. This utility model can make the steel wire rope on the outside of the drum neatly arranged by the detachable plastic liners on the outside of the drum, reduce the wear of the steel wire rope, and greatly improve the service life of the steel wire rope.

[0014] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0015] 1. This utility model can solve the controllability problem of the drum by designing the drum into a two-part detachable structure and correcting the roundness error of the drum within a reasonable range through effective machining during the manufacturing process. Furthermore, the two-part drum is more convenient for transportation, on-site installation, and subsequent disassembly and maintenance, which greatly improves the portability of the drum in production and use.

[0016] 2. This utility model can effectively seal the bearing through the skeleton oil seal, preventing lubrication leakage and greatly improving the service life of the bearing.

[0017] 3. This utility model can greatly improve the neatness and consistency of the steel wire rope arrangement and winding on the outside of the drum through the plastic liner and the rope groove opened on it, reduce the wear efficiency of the steel wire rope, improve its service life, and make operation more convenient.

[0018] 4. This utility model can effectively protect and seal the inner cavity of the stator through the end cover, and can also achieve convenient and efficient disassembly and installation by detachably mounting the end cover on the flange, making the operation more portable. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the structure of the permanent magnet synchronous motor-integrated mine hoist of this utility model;

[0020] Figure 2 This is a front view of the permanent magnet synchronous motor-integrated mine hoist of this utility model;

[0021] Figure 3 This utility model Figure 2 Sectional view at point AA;

[0022] Figure 4 This utility model Figure 3 Enlarged view of section B in the middle.

[0023] Explanation of reference numerals in the attached drawings: 100, main shaft; 200, drive component; 210, stator; 220, rotor; 221, flange; 300, drum; 301, upper half of the drum; 302, lower half of the drum; 303, annular flange; 304, first connecting plate; 305, second connecting plate; 400, bearing; 500, end cover; 600, movable gate disc; 601, upper gate disc; 602, lower gate disc; 700, encoder interface; 800, plastic liner; 900, oil seal. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-3 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0025] like Figure 1 and Figure 3As shown: This embodiment provides a permanent magnet synchronous motor-installed mine hoist, including a main shaft 100, a drive unit 200, and a drum 300 rotatably mounted on the drive unit 200. A hoisting rope, which is a steel wire rope, is provided on the outer side of the drum 300. The main shaft 100 is used to bear the entire load of the drive unit 200 and the drum 300. The drive unit 200 is an external rotor motor, model JKN-4X3P. The economic operating range of the permanent magnet synchronous motor is much wider than that of ordinary motors, not only... It exhibits high efficiency at rated load and maintains high efficiency within the 25-120% rated range, with a relatively smooth efficiency profile and minimal variation. The system includes a stator 210 located outside the main shaft 100 and a rotor 220 located outside the stator 210. The stator 210 is fixed to the outside of the main shaft 100 via a connecting plate and consists of coils and an iron core made of silicon steel sheets. Magnets made of neodymium iron boron are detachably mounted on the inner wall of the rotor 220 via screws. The rotor 20 is rotatably mounted on the main shaft 100. When current passes through the coil of the stator 210, the coil generates a changing electromagnetic field after the alternating current is applied. This magnetic field greatly enhances the magnetism of the iron core, which in turn produces the same magnetism as the magnet located inside the rotor 220. The like poles repel each other, generating torque and driving the rotor 220 to rotate. The drum 300 consists of an upper half-bore 301 and a lower half-bore 302. The upper half-bore 301 and the lower half-bore 302 are symmetrical about the central axis of the drum 300. The cylinder body 301 and the lower cylinder body 302 are detachably connected together and form a circular cylindrical structure after docking. The drum 300 is made of 16Mn steel plate and then subjected to an overall annealing process. The purpose of this process is to eliminate the welding stress of the drum 300. An annular web plate 303 is welded to the inside of the drum 300. The annular web plate 303 is set on the rotor 220. The rotation of the rotor 220 can rotate the annular web plate 303 and the drum 300 together, thereby realizing the winding and releasing of the wire rope.

[0026] When it is necessary to lift an object, the coil in the stator 210 is energized with alternating current. After the coil is energized with alternating current, a three-phase rotating magnetic field is generated. The three-phase symmetrical current synthesizes the rotating magnetic field, which makes the iron core have the same magnetism as the magnet set on the inner wall of the rotor 220. They then interact to generate torque force. The magnetic force drives the rotor 220 and the drum 300 to rotate synchronously, thereby realizing the winding of the wire rope and completing the lifting operation of the object.

[0027] According to one embodiment of the present invention, such as Figure 3As shown, a flange 221 is welded to the outside of the rotor 220. An annular flange 303 is detachably mounted on the flange 221 by bolts. The annular flange 303 has a two-part structure, including an upper flange and a lower flange. The upper flange on the upper half of the cylinder 301 and the lower flange on the lower half of the cylinder 302 form a circular annular structure after being joined together. A first connecting plate 304 is provided on the inner side of the upper half of the cylinder 301, and a second connecting plate 305 is provided on the inner side of the lower half of the cylinder 302. The first connecting plate 304 and the second connecting plate 305 are detachably mounted together by bolts and nuts. This utility model can achieve the first connection between the upper half of the cylinder 301 and the lower half of the cylinder 302 by bolts and nuts. The first connecting plate 304 and the second connecting plate 305 are locked together to achieve quick installation and fixation of the upper half cylinder 301 and the lower half cylinder 302, which greatly improves the efficiency and stability of the assembly of the upper half cylinder 301 and the lower half cylinder 302. In this utility model, the annular web plate 303 can be detachably set on the flange 221 on the outside of the rotor 220 by bolts. This not only facilitates the convenient and quick disassembly and installation of the annular web plate 303 and the flange 221 of the rotor 220, but also enables the annular web plate 303 and the drum 300 connected to it to rotate together through the rotation of the rotor 220, thereby carrying the wire rope wound on the drum 300 for winding and unwinding operations.

[0028] According to another embodiment of the present invention, such as Figure 1 and Figure 3 As shown, bearings 400 are also provided at both ends of the spindle 100, such as... Figure 3 As shown, there are two bearings 400 located at both ends of the main shaft 100. The main shaft 100 passes through the inner ring of the bearing 400 and is interference-fitted with the inner ring of the bearing 400. The bearing 400 is lubricated by grease. Each bearing 400 has an end cap 500 on its outer side. The end cap 500 has a through hole that matches the outer ring of the bearing 400. The outer ring of the bearing 400 is fixed to the inner wall of the through hole of the end cap 500 located on the same side. The end cap 500 and the flange 221 located on the same side are detachably connected by bolts. This utility model can protect and seal the inner cavity of the stator 210 through the end cap 500. Moreover, the bolts can be used to detachably mount the end cap 500 on the flange 221, which facilitates convenient and efficient disassembly and installation, making the operation more convenient.

[0029] According to another embodiment of the present invention, such as Figure 4As shown, the bearing 400 is also provided with sealing covers on both the inner and outer sides. A skeleton oil seal 900 is provided in the gap between the inner side of the sealing cover and the inner ring of the bearing 400. The skeleton oil seal 900 is made of fluororubber. The skeleton oil seal 900 can effectively seal the bearing 400, prevent the leakage of lubricating oil, and greatly improve the service life of the bearing 400.

[0030] According to another embodiment of the present invention, such as Figure 1 and Figure 2 As shown, movable brake discs 600 are respectively provided at both ends of the drum 300. The movable brake discs 600 include an upper brake disc 601 provided on the outside of the upper half of the drum 301 and a lower brake disc 602 provided on the outside of the lower half of the drum 302. This utility model allows the upper brake disc 601 to be detachably installed on the outside of the upper half of the drum 301 by bolts and nuts, and the lower brake disc 602 to be detachably installed on the outside of the lower half of the drum 302 by bolts and nuts. This enables convenient and quick disassembly and installation of the upper brake disc 601 and the lower brake disc 602, as well as subsequent maintenance operations, making it more portable and convenient. The movable brake discs 600 can stop the rotation of the drum 300, greatly improving the speed at which the drum 300 stops rotating and making operation safer.

[0031] According to another embodiment of the present invention, such as Figure 2 As shown, one of the end caps 500 is also equipped with an encoder interface 700. The encoder interface 700 is a gear-connected encoder interface 700. The commissioning personnel can adjust it according to the user's needs. During the installation and commissioning stage, the phase angle of the outer rotor 220 permanent magnet synchronous motor can be adjusted through the encoder output signal to adjust the operating closed loop and improve the safety of equipment operation.

[0032] According to another embodiment of the present invention, such as Figure 1 As shown, multiple plastic liners 800 can be installed on the outer side of the drum 300 via screws. Multiple rope grooves are provided on the plastic liners 800. A lifting rope, which is a steel wire rope, is wound on the plastic liners 800 on the outer side of the drum 300. The rope grooves on the plastic liners 800 are adapted to the diameter of the steel wire rope. This utility model can make the steel wire rope on the outer side of the drum 300 neatly arranged by the detachable plastic liners 800, reduce the wear of the steel wire rope, and greatly improve the service life of the steel wire rope.

[0033] How to use this utility model:

[0034] First, it needs to be clarified that the hoist involved in this utility model is mainly used to lift objects and place them after lifting by rotating the drum 300 to wind and release the wire rope on its outer side. This utility model takes the rotation of the drum 300 in a mine hoisting operation to wind up the wire rope and lift objects as an example to explain its usage in detail. When an object needs to be lifted, firstly, the hook at the end of the wire rope is hung on the lifting ring on the object to be lifted. Then, the coil in the stator 210 is energized. After the coil is energized with alternating current, it will generate a three-phase rotating magnetic field. The rotating magnetic field synthesized by the three-phase symmetrical current interacts with the magnetic field generated by the iron core of the permanent magnet set on the inner wall of the rotor 220 to generate torque. The magnetic force drives the rotor 220 and the drum 300 to rotate synchronously, thereby achieving... The wire rope is wound up to complete the lifting operation. During this process, when the drum 300 malfunctions or needs regular maintenance, its two-part structure makes subsequent disassembly and maintenance relatively convenient. This utility model solves the problem of the traditional permanent magnet external rotor 220 hoist drum 300 being a whole circular structure. After the steel plate is rolled into a circle, the roundness error range cannot be guaranteed through effective machining, and can only rely on the precision of the plate rolling machine. Moreover, the whole circular structure is more troublesome in terms of transportation and on-site installation. It cannot be effectively transported and installed in some special fields or in situations with many special restrictions. Due to insufficient space for operation, the whole circular structure is also inconvenient for on-site maintenance. This invention greatly improves the installation, maintenance, and portability of the drum 300.

[0035] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A permanent magnet synchronous motor-installed mine hoist, comprising a main shaft (100), a drive unit (200), and a drum (300) rotatably mounted on the drive unit (200), characterized in that: The drive unit (200) is an external rotor motor, including a stator (210) disposed outside the main shaft (100) and a rotor (220) disposed outside the stator (210), the rotor (220) being rotatably disposed on the main shaft (100); The drum (300) is composed of an upper half-bore (301) and a lower half-bore (302). The upper half-bore (301) and the lower half-bore (302) are symmetrical about the central axis of the drum (300). The upper half-bore (301) and the lower half-bore (302) can be detachably connected together and form a circular cylindrical structure after docking. The drum (300) is provided with an annular web plate (303) on its inner side, and the annular web plate (303) is provided on the rotor (220).

2. The permanent magnet synchronous motor-embedded mine hoist as described in claim 1, characterized in that: The rotor (220) is provided with flanges (221) at both ends, and the annular flange (303) is detachably mounted on the flange (221).

3. The permanent magnet synchronous motor-embedded mine hoist as described in claim 2, characterized in that: The main shaft (100) is also provided with bearings (400) at both ends. The bearings (400) are provided with end caps (500) on the outside. The end caps (500) are detachably connected to the flange (221) located on the same side.

4. The permanent magnet synchronous motor-embedded mine hoist as described in claim 3, characterized in that: The two ends of the drum (300) are respectively provided with movable gate discs (600), the movable gate discs (600) include an upper gate disc (601) provided on the outside of the upper half of the drum (301) and a lower gate disc (602) provided on the outside of the lower half of the drum (302).

5. The permanent magnet synchronous motor-embedded mine hoist as described in claim 4, characterized in that: The upper cylinder (301) has a first connecting plate (304) on its inner side, and the lower cylinder (302) has a second connecting plate (305) on its inner side. The first connecting plate (304) and the second connecting plate (305) are detached and connected together by bolts.

6. The permanent magnet synchronous motor-embedded mine hoist as described in claim 3, characterized in that: An encoder interface (700) is also provided on one of the end caps (500).

7. The permanent magnet synchronous motor-embedded mine hoist as described in claim 1 or 4, characterized in that: The outer side of the roll (300) is also provided with a plastic liner (800).

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