Permanent magnet motor direct-driven vertical mill with bidirectional load buffer device

Abstract

The invention discloses a permanent magnet motor direct-driven vertical mill with a bidirectional load buffer device. The permanent magnet motor direct-driven vertical mill comprises a vertical mill, a vertical mill power system, the bidirectional load buffer device, a support frame and a base, wherein the power system comprises a rotor mechanism and an annular stator mechanism; the rotor mechanism is sleeved with the annular stator mechanism; the annular stator mechanism drives the rotor mechanism to rotate; a grinding disc is arranged above the rotor mechanism; a rotary drum is connected with the grinding disc of the vertical mill; the annular stator structure mainly comprises a three-dimensional shell, a motor winding and a base; the base is used for supporting the stator structure and a fixed bearing; and the bidirectional load buffer device is arranged at the circumferential position of the upper end face of the stator structure or the lower end face of the grinding disc, is composed of fan-shaped modules and is spliced into a ring-shaped structure. The bidirectional load buffer device can ensure the relative sliding of the stator structure and the rotor structure, and also can bear the radial and axial bidirectional bearing force from the permanent magnet direct-driven vertical mill.

Description

technical field [0001] The invention relates to the technical field of vertical mills, in particular to a permanent magnet motor direct-drive vertical mill with a bidirectional load buffering device. Background technique [0002] The vertical mill is the key equipment for grinding the material into powder after being crushed. The vertical mill is based on the extensive use of advanced technology at home and abroad, combined with many years of various mills, pulverizers, and ball mills. Advanced production experience, design and development of advanced grinding equipment; it is an ideal equipment for the grinding industry that integrates crushing, drying, grinding, and grading and conveying. Can be widely used in cement, electric power, metallurgy, chemical industry, non-metallic minerals and other industries. It is used to grind lumpy, granular and powdery raw materials into required powdery materials. Before the 1960s, the newly developed vertical mill had an imperfect st...

AI Technical Summary

Problems solved by technology

The foundation is composed of the main machine frame, the reducer base, the motor base, the anchor bolt box, the lower support of the tensioning device, etc.; the transmission device is composed of the main asynchronous motor, the main reducer, etc.; the roller plate structure, the main components are rollers and plate; pressure device, vertical mill has spring pressure and hydraulic pressure; the transmission structure of this asynchronous motor-reducer-gear pair has a large volume, a large installation area, large noise during operation, and low mechanical efficiency. Problems such as high energy consumption and low energy utilization rate are obviously inconsistent with my country's current energy strategy for energy conservation and emission reduction

At the same time, the open gear of the edge drive is in a gear cover that is difficult to be strictly sealed, and it is difficult to maintain good lubrication. The exposed gear pair needs to be lubricated continuously, which is easy to be polluted, and the wear is quite severe after dust intrusion, and its life is short. The parts are scattered, the oil supply point and inspection point are large, and it is difficult to operate, inspect and maintain

Especially when starting and running, due to the need to overcome the relatively large friction of the sliding bearing, the power loss of the motor will inevitably increase.

[0004] In order to solve the above-mentioned defects of low transmission efficiency and related deficiencies, in recent years, many patents have proposed to improve the efficiency of vertical mills, and the Chinese patent application number is "201110038911 .X" patent name is "Electrical direct drive technology for high-power low-speed mechanical equipment", and the Chinese patent application number is "201210219250.5". For the "201821535752.8" patent titled "a vertical mill equipment and its drive system", it is proposed to remove the traditional mechanical transmission idea and use the increasingly mature permanent magnet synchronous motor direct drive

In the existing permanent magnet direct drive vertical mill bearing lubrication system, there are limit bearings at the lower end of the rotor, centralizing bearings and thrust bearings at the upper end of the rotor. Due to the large diameter of the mill, the diameters of the centralizing bearings and thrust bearings are also large, so the manufacturing of the bearings The maintenance cost is high, and the installation and maintenance will also cause inconvenience due to the large size of the mill and the bearing, which cannot meet the needs of actual use. Therefore, there is an urgent need for improved technology on the market to solve the above problems

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