Winding drum with built-in motor and external speed reducer

Abstract

The invention discloses a winding drum with a built-in motor and an external speed reducer. The winding drum comprises the motor, a motor connecting frame, a left supporting seat, a right supporting seat, a winding drum shell and the quasi-planetary speed reducer. Wherein the motor connecting frame, the motor, the connecting flange and the wheel train supporting frame form a penetrating type main shaft which is arranged in the winding drum shell and supported between the left supporting seat and the right supporting seat; the quasi planetary reducer comprises a coupler, a center wheel, an idle wheel set, an inner gear ring, a gear train supporting frame, a plurality of bearings and a plurality of sealing pieces. Left and right supporting discs are arranged at the two ends of the winding drum shell and installed on the penetrating type main shaft. The motor is internally arranged, the axial size of the winding drum is shortened, and the roadway and chamber excavation cost is reduced; the quasi-planetary reducer reduces the size of the motor and increases the gap between the motor and the winding drum shell, so that heat dissipation is facilitated; and the speed reducer is externally arranged and is detachably designed, so that the quasi planetary speed reducer can be quickly detached and is convenient to maintain. The winding drum with the built-in motor and the external speed reducer has the advantages of being good in heat dissipation performance, simple in structure, short in axial distance, convenient to install, high in adaptability and the like.

Description

Technical Field

[0001] The invention relates to a drum with a built-in motor and an external reducer, in particular to a drum with a built-in motor and an external reducer suitable for a driving device of a hoist, a winch, a belt conveyor and the like. Background Art

[0002] Hoists and belt conveyors are widely used in coal mines to achieve underground and above-ground operations. Usually, the drive devices of hoists and belt conveyors often use asynchronous motors or explosion-proof asynchronous motors with speed reducers and reels. In this mode, the drive devices of hoists and belt conveyors axially include a mechanical system of "motor + high-speed end coupling + speed reducer + low-speed end coupling + reel", with a long axial distance, and the underground installation and use requires a larger chamber space; and the drive devices using asynchronous motors or explosion-proof asynchronous motors with speed reducers have low efficiency and high energy consumption.

[0003] The existing drive devices of hoists and belt conveyors include permanent magnet motor direct drive drums. Compared with the structure of using asynchronous motors or explosion-proof asynchronous motors plus couplings plus drum devices, this type of drive device removes the reducer part and the high-speed end coupling part, and the axial distance is shortened, but the distance is still long; and the output of the drive motor is required to be high torque and low speed in the direct drive mode, but the high-torque permanent magnet motor is large in size and is not convenient for transportation and installation in underground tunnels.

[0004] The existing driving devices of hoists and belt conveyors include permanent magnet outer rotor motor drums. The permanent magnet motor has a stator inside and an outer rotor and drum outside, which can be driven directly. Compared with the permanent magnet motor direct drive drum, the coupling part is subtracted axially, and the axial distance is only the length of the drum. There are two types: non-explosion-proof and explosion-proof. There is an air gap between the stator and the outer rotor of the non-explosion-proof permanent magnet outer rotor motor drum, which can only be used above the well and is not suitable for underground environments. The explosion-proof permanent magnet outer rotor motor drum has the air gap sealed and can be used in underground and above-well conditions, but currently there are only explosion-proof drums with motor power not exceeding 315kW. Under underground conditions, it is suitable for the driving device of belt conveyors with lower loads, but it is difficult to meet the power requirements when used for the driving device of underground hoists with large loads.

[0005] At present, the patents for the driving devices of hoists and belt conveyors that have motors, multi-stage reducers or reducers built into the drum shell include "A drum with a built-in motor and multi-stage reducer (CN202321789418.6)", "A mining hoist with a built-in motor and reducer in the drum (CN202121310264.9)", and "A drum with a built-in motor (CN202123377883.2)". These patents do not meet the relevant requirements of the "Policy Guidelines for Coal Production Technology and Equipment" due to their complex structure, large size, poor motor heat dissipation and other problems: Underground lifting - Prohibited category - Internal gear winch for main shaft lifting. Summary of the invention

[0006] Technical problem: The purpose of the present invention is to overcome the shortcomings of the prior art and provide a reel with a built-in motor and an external reducer, making full use of the internal space of the reel, and replacing the electric motor, high-speed end coupling, reducer, low-speed end coupling, or low-speed, high-torque permanent magnet motor direct-drive reel, or permanent magnet outer rotor motor reel, or a reel with a built-in motor and a multi-stage reducer that were originally arranged horizontally on the outside of the reel device with "built-in motor + external quasi-planetary reducer" to achieve transmission, so that the reel complies with relevant regulations, has a shortened axial size, and is suitable for a variety of reel working conditions, thereby facilitating the underground transportation and installation of the equipment, and greatly saving mining costs.

[0007] Technical solution: To achieve the above-mentioned purpose, a reel with a built-in motor and an external reducer of the present invention comprises a left support seat, a bearing 1, a motor connecting frame, a left support plate, a reel housing, a motor, a coupling, a connecting flange, a right support plate, a right support seat and a quasi-planetary reducer, wherein the quasi-planetary reducer comprises a left connecting plate of an inner gear ring, an inner gear ring, a right connecting plate of an inner gear ring, an idler wheel group, a gear train supporting frame, an idler wheel shaft, a bearing 2, a center wheel, a bearing 3, a bearing 4 and a plurality of connecting bolts and sealing members; the motor is arranged inside the reel housing, and the The quasi-planetary reducer is arranged outside the reel; the left end of the motor stator is connected to the motor connecting frame, the right end of the motor stator is connected to the left end of the connecting flange, and the right end of the connecting flange is connected to the left end of the gear train support frame of the quasi-planetary reducer; the motor connecting frame, the motor stator, the connecting flange, and the gear train support frame are connected to form a main shaft that passes through the reel left and right; the left end of the motor connecting frame that passes through the main shaft left and right is fixedly connected to the left supporting seat, and the right end of the gear train support frame that passes through the main shaft left and right is fixedly connected to the right supporting seat; the left supporting plate and the right supporting plate are respectively arranged at At the left and right ends of the drum housing, the center hole of the left supporting plate is slewingly supported on the motor connecting frame through a bearing, and the outer edge of the left supporting plate is fixed to the drum housing by bolts; the center hole of the right supporting plate is connected to the left connecting plate of the inner gear ring on the outer edge of the quasi-planetary reducer by bolts, and the outer edge of the right supporting plate is fixed to the drum housing by bolts; the output shaft of the motor is connected to the center wheel of the quasi-planetary reducer, and the center wheel is meshed with the idler gear set, and the idler gear set is supported on the idler shaft through bearing two, and the idler shaft is meshed with the inner gear ring; the idler shaft is fixed Installed in the shaft hole of the gear support frame, the left and right ends of the inner gear ring are respectively connected to the outer edges of the left connecting plate of the inner gear ring and the right connecting plate of the inner gear ring by screws; the inner hole of the left connecting plate of the inner gear ring is supported on the left end of the gear support frame by four rotations of the bearing, and the inner hole of the right connecting plate of the inner gear ring is supported on the right end of the gear support frame by three rotations of the bearing; the outer edge of the left connecting plate of the inner gear ring is fixedly connected to the right supporting plate by bolts; the right end cover of the motor, the connecting flange, the left connecting plate of the inner gear ring, the inner gear ring, the right connecting plate of the inner gear ring, the gear support frame and multiple bearings form a sealed chamber.

[0008] Sealing gaskets are arranged between the right end of the motor and the left end of the connecting flange, between the outer edge of the left connecting plate of the inner gear ring and the left end of the inner gear ring, and between the right end of the inner gear ring and the outer edge of the right connecting plate of the inner gear ring.

[0009] A lip seal ring is arranged between the right end of the connecting flange and the coupling.

[0010] Bearings and lip seals are arranged between the right end of the connecting flange, the left end of the wheel train support frame and the inner hole of the left connecting plate of the inner gear ring, and between the right end of the wheel train support frame and the inner hole of the right connecting plate of the inner gear ring.

[0011] The output shaft of the motor is connected to the quasi-planetary reducer through a coupling.

[0012] The number of teeth of the central wheel is Z1, the number of teeth of the idler wheel set is Z3, and the number of teeth of the inner ring gear is Z2; the reduction ratio of the quasi-planetary reducer is (Z2 / Z1).

[0013] The reduction ratio range of the quasi-planetary reducer is 2-12.

[0014] Beneficial effect: Due to the adoption of the above technical scheme, the drum with built-in motor and external reducer of the present invention is suitable for asynchronous motor and permanent magnet motor, and is also suitable for non-explosion-proof on the well and explosion-proof underground. The motor is built into the drum shell, which shortens the axial size of the "motor + drum" mechanical subsystem and reduces the cost of tunnel and chamber excavation; the "external quasi-planetary reducer" is on the external side of the drum assembly, which meets the relevant requirements of the "Coal Production Technology and Equipment Policy Guide"; the internal space of the drum shell is fully utilized, and the built-in motor is used to realize the transmission, so that the axial size of the drum drive device is shortened, which is very convenient for the underground transportation and installation of the equipment, and greatly saves the mining cost. Compared with the existing drive devices of hoists and belt conveyors, such as the structure of "asynchronous motor or explosion-proof asynchronous motor + reducer + drum device" and the structure of "permanent magnet motor direct drive drum". The axial size is significantly shortened: the axial distance of the motor, high-speed end coupling, reducer, and low-speed end coupling is subtracted, or the axial distance of the permanent magnet motor and the coupling is subtracted. Compared with the driving device "a drum with a built-in motor" of the hoist and belt conveyor using the built-in motor direct drive method, compared with the present invention, under the same working conditions (same load, speed, and drum diameter), the motor volume required for the built-in direct drive method is larger. Taking a motor with a rated power of 355kW as an example, assuming that the rated speed of the motor required for the motor direct drive is 100rpm, the rated speed of the motor required by the present invention is 750rpm (the reduction ratio of the quasi-planetary reducer is 7.5). The smallest frame size that can be achieved for a 355kW, 100rpm motor is 560, while the smallest frame size that can be achieved for a 355kW, 750rpm motor is 400, and the motor diameter is significantly reduced. In addition, due to the larger diameter of the built-in motor, the gap between the motor and the inner wall of the drum is smaller. In the same example, compared with the motor with a frame size of 560, the motor with a frame size of 400 has a larger gap with the inner wall of the drum. The present invention has a compact structure and is easy to use. Installing a reducer assembly not only reduces the rated speed of the motor, reduces the size of the motor, and reduces the cost of the motor, but also increases the gap between the motor and the drum shell, which is convenient for heat dissipation. The built-in explosion-proof motor meets the explosion-proof requirements of underground equipment. The reducer assembly is designed to be detachable. The bolts between the quasi-planetary reducer and the right supporting disk, and between the right end of the motor and the connecting flange can be removed, and the reducer component as a whole and the right disassembly disk can be removed from the drum housing, which is convenient for maintenance and installation. The present invention has wide practicality and innovation in the field of this technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of a drum structure with a built-in motor and an external reducer of the present invention.

[0016] Figure 2 It is a schematic diagram of disassembling a drum reducer with a built-in motor and an external reducer according to the present invention.

[0017] In the figure: 1. left supporting seat, 2. bearing one, 3. motor connecting frame, 4. left supporting plate, 5. reel housing, 6. motor, 6-1. motor extension shaft, 7. coupling, 8. connecting flange, 9. right supporting plate, 10. left connecting plate of inner gear ring, 11. inner gear ring, 12. right connecting plate of inner gear ring, 13. idler gear group, 14. gear train supporting frame, 15. idler gear shaft, 16. bearing two, 17. center wheel, 18. bearing three, 19. bearing four, 20. right supporting seat, A1, connecting bolt one, A2, connecting bolt two. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the embodiments in the accompanying drawings:

[0019] Figure 1As shown, a reel with a built-in motor and an external reducer of the present invention is mainly composed of a left support seat 1, a bearing 2, a motor connecting frame 3, a left support plate 4, a reel housing 5, a motor 6, a coupling 7, a connecting flange 8, a right support plate 9, a right support seat 20 and a quasi-planetary reducer, wherein the quasi-planetary reducer comprises an inner gear ring left connecting plate 10, an inner gear ring 11, an inner gear ring right connecting plate 12, an idler wheel group 13, a gear train support frame 14, an idler wheel shaft 15, a bearing 2 16, a center wheel 17, a bearing 3 18, a bearing 4 19 and a plurality of connecting bolts and seals; the motor 6 is arranged inside the reel housing 5, and the quasi-planetary reducer is arranged outside the reel; the left end of the stator of the motor 6 is connected to the motor connecting frame 3, the right end of the stator of the motor 6 is connected to the left end of the connecting flange 8, and the right end of the connecting flange 8 is connected to the left end of the gear train support frame 14 of the quasi-planetary reducer; the motor connecting frame 3, the stator of the motor 6, the connecting flange 8, the gear train The connection composition of the support frame 14 supports the main shaft that passes through the left and right sides of the reel; the left end of the motor connecting frame 3 that passes through the main shaft is fixedly connected to the left supporting seat 1, and the right end of the gear train supporting frame 14 that passes through the main shaft is fixedly connected to the right supporting seat 20; the left supporting plate 4 and the right supporting plate 9 are respectively arranged at the left and right ends of the reel housing 5, the center hole of the left supporting plate 4 is slewingly supported on the motor connecting frame 3 through a bearing 2, and the outer edge of the left supporting plate 4 is fixed to the reel housing 5 by bolts; the center hole of the right supporting plate 9 is fixedly connected to the left connecting plate 10 of the inner gear ring at the outer edge of the quasi-planetary reducer by bolts, and the outer edge of the right supporting plate 9 is fixed to the reel housing 5 by bolts; the output shaft 6-1 of the motor 6 is connected to the center wheel 17 of the quasi-planetary reducer, and the center wheel 17 is meshed with the idler gear group 13, the number of teeth of the center wheel 17 is Z1, the number of teeth of the idler gear group 13 is Z3, and the number of teeth of the inner gear ring 11 is Z2; the reduction ratio of the quasi-planetary reducer is Z2 / Z1. The output shaft 6-1 of the motor 6 is connected to the quasi-planetary reducer through a coupling 7. The idler gear set 13 is supported on the idler shaft 15 through a bearing 2 16, and the idler gear set 13 is meshed with the inner gear ring 11; the idler shaft 15 is fixedly installed in the shaft hole of the gear support frame 14, and the left and right ends of the inner gear ring 11 are respectively connected to the outer edges of the left connecting plate 10 of the inner gear ring and the outer edges of the right connecting plate 12 of the inner gear ring by screws; the inner hole of the left connecting plate 10 of the inner gear ring is rotatably supported on the left end of the gear support frame 14 through a bearing 4 19, and the inner hole of the right connecting plate 12 of the inner gear ring is rotatably supported on the right end of the gear support frame 14 through a bearing 3 18; the outer edge of the left connecting plate 10 of the inner gear ring is fixedly connected to the right supporting plate 9 by bolts; the right end cover of the motor 6, the connecting flange 8, the left connecting plate 10 of the inner gear ring, the inner gear ring 11, the right connecting plate 12 of the inner gear ring, the gear support frame 14 and a plurality of bearings form a sealed chamber. Sealing gaskets are provided between the right end of the motor 6 and the left end of the connecting flange 8, between the outer edge of the inner gear ring left connecting plate 10 and the left end of the inner gear ring 11, and between the right end of the inner gear ring 11 and the outer edge of the inner gear ring right connecting plate 12. A lip seal is provided between the right end of the connecting flange 8 and the coupling 7.The right end of the connecting flange 8, the left end of the gear train support frame 14 and the inner hole of the left connecting plate 10 of the inner gear ring, and the right end of the gear train support frame 14 and the inner hole of the right connecting plate 12 of the inner gear ring are all provided with bearings and lip seals. The reduction ratio range of the quasi-planetary reducer is 2-12; if the rated speed of the motor 6 is 750rpm and the power is 355kW, the reduction ratio of the quasi-planetary reducer is 7.5. The smallest frame size that can be achieved by the 355kW, 750rpm motor (6) is 400; the rated speed of the motor required for the reel without a reducer is 100rpm, while the smallest frame size that can be achieved by the 355kW, 100rpm motor is 560, and the diameter of the motor in this patent is significantly reduced.

[0020] Working process: the output shaft 6-1 at the right end of the motor 6 is connected to the center wheel 17 through the coupling 7 to rotate, and the center wheel 17 then drives the idler wheel group 13 to rotate, the idler wheel group 13 drives the inner gear ring 11 to rotate, and the inner gear ring 11 finally drives the right supporting disk 9 and the reel shell 5 to rotate to realize the work.

[0021] When disassembling or assembling, Figure 2 As shown, it is only necessary to install and disassemble the connecting bolts A1 between the right end of the motor 6 and the connecting flange 8, and the connecting bolts A2 between the left connecting plate 10 of the inner gear ring of the quasi-planetary reducer and the right supporting plate 9, to complete the disassembly of the connecting flange and the quasi-planetary reducer, making it convenient to repair and maintain the reducer.

[0022] The terms “left” and “right” mentioned above are only used to clearly describe the directions and are not used to limit the present invention.

Claims

1. A reel with a built-in motor and an external reducer, comprising a left support seat (1), a bearing 1 (2), a motor connecting frame (3), a left support plate (4), a reel housing (5), a motor (6), a coupling (7), a connecting flange (8), a right support plate (9), a right support seat (20) and a quasi-planetary reducer, characterized in that: The quasi-planetary reducer comprises a left connecting plate (10) of an inner gear ring, an inner gear ring (11), a right connecting plate (12) of an inner gear ring, an idler wheel group (13), a gear train support frame (14), an idler wheel shaft (15), a second bearing (16), a center wheel (17), a third bearing (18), a fourth bearing (19) and a plurality of connecting bolts and sealing members; the motor (6) is arranged inside a drum housing (5), and the quasi-planetary reducer is arranged outside the drum; the left end of the stator of the motor (6) is connected to the motor connecting frame (3), the right end of the stator of the motor (6) is connected to the left end of a connecting flange (8), and the right end of the connecting flange (8) is connected to the gear train of the quasi-planetary reducer. The left end of the support frame (14) is connected; the motor connecting frame (3), the stator of the motor (6), the connecting flange (8), and the wheel support frame (14) are connected to form a main shaft that supports the reel to pass through left and right; the left end of the motor connecting frame (3) that passes through the main shaft to the left and right is fixedly connected to the left support seat (1), and the right end of the wheel support frame (14) that passes through the main shaft to the left and right is fixedly connected to the right support seat (20); the left support plate (4) and the right support plate (9) are respectively arranged at the left and right ends of the reel housing (5), the center hole of the left support plate (4) is slewingly supported on the motor connecting frame (3) through a bearing (2), and the outer edge of the left support plate (4) is fixed to the reel housing ( 5); the center hole of the right support plate (9) is connected to the left connecting plate (10) of the inner gear ring on the outer edge of the quasi-planetary reducer by bolts, and the outer edge of the right support plate (9) is fixed to the winding drum housing (5) by bolts; the output shaft (6-1) of the motor (6) is connected to the center wheel (17) of the quasi-planetary reducer, the center wheel (17) is meshed with the idler wheel group (13), the idler wheel group (13) is supported on the idler wheel shaft (15) through the second bearing (16), and the idler wheel group (13) is meshed with the inner gear ring (11); the idler wheel shaft (15) is fixedly installed in the shaft hole of the gear train support frame (14), and the left and right ends of the inner gear ring (11) are respectively The inner hole of the inner gear ring left connecting plate (10) is rotatably supported at the left end of the gear train support frame (14) through a fourth bearing (19), and the inner hole of the inner gear ring right connecting plate (12) is rotatably supported at the right end of the gear train support frame (14) through a third bearing (18); the outer edge of the inner gear ring left connecting plate (10) is fixedly connected to the right supporting plate (9) through bolts; the right end cover of the motor (6), the connecting flange (8), the inner gear ring left connecting plate (10), the inner gear ring (11), the inner gear ring right connecting plate (12), the gear train support frame (14) and a plurality of bearings form a sealed chamber.

2. A reel with a built-in motor and an external reducer according to claim 1, characterized in that: Sealing gaskets are provided between the right end of the motor (6) and the left end of the connecting flange (8), between the outer edge of the inner gear ring left connecting plate (10) and the left end of the inner gear ring (11), and between the right end of the inner gear ring (11) and the outer edge of the inner gear ring right connecting plate (12).

3. The reel with a built-in motor and an external reducer according to claim 1, characterized in that: A lip seal ring is provided between the right end of the connecting flange (8) and the coupling (7).

4. The reel with a built-in motor and an external reducer according to claim 1, characterized in that: Bearings and lip seals are provided between the right end of the connecting flange (8), the left end of the gear train support frame (14) and the inner hole of the left connecting plate (10) of the inner gear ring, and between the right end of the gear train support frame (14) and the inner hole of the right connecting plate (12) of the inner gear ring.

5. The reel with a built-in motor and an external reducer according to claim 1, characterized in that: The output shaft (6-1) of the motor (6) is connected to the quasi-planetary reducer via a coupling (7).

6. The reel with a built-in motor and an external reducer according to claim 1, characterized in that: The number of teeth of the central wheel (17) is Z1, the number of teeth of the idler wheel group (13) is Z3, and the number of teeth of the inner ring gear (11) is Z2; the reduction ratio of the quasi-planetary reducer is (Z2 / Z1).

7. The reel with a built-in motor and an external reducer according to claim 1, characterized in that: The reduction ratio range of the quasi-planetary reducer is 2-12.

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