Permanent magnet frequency conversion tensioning device

Abstract

The utility model provides a permanent magnet frequency conversion tensioning device which comprises a frequency conversion all-in-one machine, a first supporting set, a speed reducer, a second supporting set, a winding drum, a third supporting set, a brake and a high-speed shaft, the first supporting set comprises a first supporting plate, a transition sleeve and a first bearing, the second supporting set comprises a second supporting plate, and the third supporting set comprises a third supporting plate, a third bearing and a support. The outer edge of the third supporting plate is fixedly connected with the inner wall of the winding drum, the inner edge of the third supporting plate is connected with the third bearing, the third bearing sleeves the outer wall of the brake shaft, the upper end of the support is connected with the third bearing, and the lower end of the support is fixed to an external platform; according to the scheme, the frequency conversion all-in-one machine is arranged close to the speed reducer, the frequency conversion all-in-one machine is directly connected with the speed reducer without long-distance line connection, the line length between the frequency converter and the permanent magnet motor is shortened, the influence of the external environment on signal transmission is avoided, and the whole machine has the advantages of being small in size, light in weight, compact in structure, large in tensioning force, high in response speed and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of belt conveyor supporting equipment, in particular to a permanent magnet variable frequency tensioning device. Background Art

[0002] The inverter driving the reducer in the tensioning device of the underground belt conveyor in the coal mine is set at least 30 meters away, and the two are connected through a communication line, which leads to the problems of slow response speed, large size, low transmission efficiency, strong signal interference and complex line layout of the tensioning device. Figure 1 . Summary of the invention

[0003] In view of the above defects, the utility model proposes a permanent magnet variable frequency tensioning device, including a variable frequency machine, a first support group, a reducer, a second support group, a reel, a third support group, a brake, and a high-speed shaft. The variable frequency machine, the reducer, and the brake are arranged in sequence from right to left, and the brake is arranged close to the reducer. The transmission output end of the variable frequency machine is connected to the reducer through a spline to form the power for the reducer to work. The high-speed shaft of the reducer passes through the third support group to be connected to the brake. The first support group includes a first support plate, a transition sleeve, and a first bearing. The first support plate is fixed to the external platform. One end of the transition sleeve is sleeved on the outside of the variable frequency machine and is fixedly connected to the variable frequency machine through bolts of the end flange. The other end is connected to the first support plate. A support plate is fixedly connected to install and fix the frequency converter, and the first bearing is arranged between the outer wall of the transition sleeve and the drum to enable the drum to rotate relative to the transition sleeve. The second support group includes a second support plate, the inner edge of the second support plate is sleeved on the outer wall of the reducer, and the outer edge of the second support plate is fixedly connected to the inner wall of the drum to drive the drum to rotate through the rotation of the reducer to achieve tightening and loosening of the wire rope wrapped on the outer wall of the drum. The third support group includes a third support plate, a third bearing, and a bracket. The outer edge of the third support plate is fixedly connected to the inner wall of the drum, the inner edge of the third support plate is connected to the third bearing, the third bearing is sleeved on the outer wall of the high-speed shaft, the upper end of the bracket is connected to the third bearing, and the lower end of the bracket is fixed to the external platform.

[0004] This solution sets the frequency converter close to the reducer. The frequency converter is directly connected to the reducer without long-distance line connection, shortening the line length between the frequency converter and the permanent magnet motor and avoiding the influence of the external environment on signal transmission. The whole machine has the characteristics of small size, light weight, compact structure, large tensioning force and fast response speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 This is a structural diagram of the original design.

[0006] Figure 2 It is a structural schematic diagram of the utility model.

[0007] In the figure: frequency converter 10, first support plate 21, transition sleeve 22, first bearing 23, reducer 30, second support plate 41, reel 50, third support plate 61, oil injection hole 611, third bearing 62, bracket 63, brake 70, high-speed shaft 80, wire rope 100. DETAILED DESCRIPTION

[0008] See also Figure 2 A permanent magnet variable frequency tensioning device includes a variable frequency machine 10, a first support group, a reducer 30, a second support group, a reel 50, a third support group, a brake 70, and a high-speed shaft 80. The variable frequency machine 10, the reducer 30, and the brake 70 are arranged in sequence from right to left. The brake 70 is arranged close to the reducer 30. The transmission output end of the variable frequency machine 10 is connected to the reducer 30 through a spline to form the power of the reducer 30. The transmission output end of the reducer 30 is connected to the high-speed shaft 80, and the high-speed shaft 80 passes through the third support group to be connected to the brake 70. The first support group includes a first support plate 21, a transition sleeve 22, and a first bearing 23. The first support plate 21 is fixed to the external platform. One end of the transition sleeve 22 is sleeved on the outside of the variable frequency machine 10, and the other end is fixedly connected to the first support plate 21 to The body machine 10 is installed and fixed, and the first bearing 23 is arranged between the outer wall of the transition sleeve 22 and the drum 50 to enable the drum 50 to rotate relative to the transition sleeve 22. The second support group includes a second support plate 41, and the inner edge of the second support plate 41 is sleeved on the outer wall of the reducer 30. The outer edge of the second support plate 41 is fixedly connected to the inner wall of the drum 50, so as to drive the drum 50 to rotate through the rotation of the reducer 30, thereby realizing the tightening and loosening of the wire rope wound on the outer wall of the drum 50. The third support group includes a third support plate 61, a third bearing 62, and a bracket 63. The outer edge of the third support plate 61 is fixedly connected to the inner wall of the drum 50, and the inner edge of the third support plate 61 is connected to the third bearing 62. The third bearing 62 is sleeved on the outer wall of the high-speed shaft 80. The upper end of the bracket 63 is connected to the third bearing 62, and the lower end of the bracket 63 is fixed to the external platform.

[0009] The third support group further includes a fourth bearing 64 . The fourth bearing 64 is sleeved on the outer wall of the high-speed shaft 80 . The fourth bearing 64 is disposed close to the third bearing 63 .

[0010] In this solution, the frequency converter 10 is set close to the reducer, and the frequency converter 10 is directly connected to the reducer without long-distance line connection, which shortens the line length between the frequency converter and the permanent magnet motor, avoids the influence of the external environment on signal transmission, and the whole machine has the characteristics of small size, light weight, compact structure, large tension force, fast response speed, etc. In this solution, the brake 70 is set close to the reducer, and the length of the high-speed shaft 80 only needs to be connected between the brake 70 and the reducer, so that the length of the high-speed shaft 80 is the shortest, and when rotating, the centrifugal force is small, the jitter is small, and the transmission stability is good; the brake is connected to the high-speed shaft, and the braking torque is small; and the fourth bearing 64 is also set at the leftmost end of the high-speed shaft to further limit the rotation jitter of the high-speed shaft; the push rod brake selected in this solution can protect the device by adjusting the braking torque, and the high-speed shaft 80 is limited at two points through the third bearing 62 and the brake 70, and rotates linearly, and the power is provided by the frequency converter 10.

[0011] In the original design, the reducer is set in the inner cavity, and the frequency converter that drives the reducer is placed at least 30 meters away. The two are connected by a communication line. The high-speed shaft 80 needs to extend to both ends and be connected to the third bearing 62 and the brake 70 respectively. The length runs through the entire length direction of the device. The length is more than 3 times that of this solution. It vibrates severely during operation and has poor stability.

[0012] Furthermore, the transition sleeve 22, the first bearing 23, the drum 50, and the third support plate 61 form an inner cavity to seal the reducer and isolate it from the outside. An oil filling hole 611 is also formed on the side wall of the third support plate 61 for filling the reducer with oil. The oil filling hole 611 is set on the third support plate 61, and the third support plate 61 rotates synchronously with the drum 50, the second support plate 41, and the reducer. When the oil needs to be injected, the third support plate 61 is rotated so that the oil filling hole 611 is located above the third bearing 62. When the oil needs to be replaced after use, the third support plate 61 is turned downward so that the oil filling hole 611 is located below the third bearing 62, and the oil is automatically discharged. In the original design, the oil filling hole 611 is set on the drum 50. When oiling or discharging is required, the wire rope can only be fully released and removed to leak out the oil filling hole 611. Compared with the original design, this solution does not need to remove the wire rope to add oil or discharge.

[0013] During operation, the frequency converter 10 drives the reducer to work, and the reducer drives the drum 50 to rotate, so as to achieve the purpose of reducing speed and increasing torque, and realize high-tension tension of the drum 50, and then mobilize the wire rope to lengthen or retract, and the end of the high-speed shaft 80 passes through the brake 70. When braking is required, the frequency converter 10 and the reducer stop rotating, but maintain the output torque, and the wire rope 100 is in a tensioned state. At the same time, the brake 70 alarms the high-speed shaft 80 to achieve braking.

[0014] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of this patent.

Claims

1. A permanent magnet variable frequency tensioning device, characterized in that: It includes a frequency converter, a first support group, a reducer, a second support group, a reel, a third support group, a brake, and a high-speed shaft. The frequency converter, reducer, and brake are arranged in sequence from right to left. The brake is arranged close to the reducer. The transmission output end of the frequency converter is connected to the reducer through a spline to form the power for the reducer to work. The transmission output end of the reducer is connected to the high-speed shaft. The high-speed shaft passes through the third support group to be connected to the brake. The first support group includes a first support plate, a transition sleeve, and a first bearing. The first support plate is fixed on the external platform. One end of the transition sleeve is sleeved on the outside of the frequency converter, and the other end is fixedly connected to the first support plate to install the frequency converter. The first bearing is arranged between the outer wall of the transition sleeve and the drum to enable the drum to rotate relative to the transition sleeve. The second support group includes a second support plate, the inner edge of the second support plate is sleeved on the outer wall of the reducer, and the outer edge of the second support plate is fixedly connected to the inner wall of the drum to drive the drum to rotate through the rotation of the reducer to achieve the tightening and loosening of the wire rope wound on the outer wall of the drum. The third support group includes a third support plate, a third bearing, and a bracket. The outer edge of the third support plate is fixedly connected to the inner wall of the drum, the inner edge of the third support plate is connected to the third bearing, the third bearing is sleeved on the outer wall of the high-speed shaft, the upper end of the bracket is connected to the third bearing, and the lower end of the bracket is fixed to the external platform.

2. The permanent magnet variable frequency tensioning device according to claim 1, characterized in that: The transition sleeve, the first bearing, the reel and the third support plate form an inner cavity for filling with engine oil, and an oil filling hole is also formed on the side wall of the third support plate.

3. The permanent magnet variable frequency tensioning device according to claim 1, characterized in that: The third support group also includes a fourth bearing.

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