Vertical linear motor assisted driving type super-deep well extra-large-tonnage skip hoisting system

Abstract

The invention discloses a vertical linear motor assisted driving type super-deep well extra-large-tonnage skip hoisting system. The vertical linear motor assisted driving type super-deep well extra-large-tonnage skip hoisting system comprises a steel wire rope hoisting system, a linear motor assisted hoisting system and a control system. On the basis of an original steel wire rope hoisting system,an original cage guide structure is eliminated, an embedded linear guide rail is used for replacing a cage guide for functioning, a vertical moving type linear motor is mounted on a tower, a truss inthe well wall and a skip, and electromagnetic driving force generated through up-down linear movement of the linear motor is used for assisting in transporting of minerals; and an additionally-mounted linear motor assisted driving system works in cooperation with the steel wire rope hoisting system, so that on the premise of ensuring the structural strength of the hoisting system, the hoisting tonnage and the hoisting depth of the hoisting system are increased, and then the hoisting system meets the requirement of hoisting of the super-deep well extra-large-tonnage skip.

Description

technical field [0001] The invention relates to a skip lifting system, in particular to a super-deep well ultra-large tonnage skip lifting system driven by a vertical linear motor. Background technique [0002] my country is a country with large coal resources in the world, and the amount of coal mining and consumption ranks among the top in the world. In the coal mining system, mine transportation and lifting are important components of the mining process, and the skip is the most important part of mine transportation and lifting. One of the most advanced equipment, it is generally used to lift coal, gangue and other materials in the main shaft of mines. [0003] With the development of economy and science and technology, human beings are becoming more and more dependent on natural resources. Since the reserves of natural resources such as coal, metals and non-metals buried shallowly have been greatly reduced, the mining of mines in my country is bound to move towards ultra-...

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Problems solved by technology

[0004] However, with the increase of the lifting depth, the following problems limit the development of the skip lifting system in the direction of ultra-deep wells:

[0005] (1) The mechanical properties of the steel wire rope seriously affect the lifting depth. With the increase of the lifting depth, the steel wire rope gradually becomes longer and thicker, the safety factor decreases, and the proportion of its own weight is also increasing. The problems of fatigue wear, fracture and corrosion of steel wire rope are also more serious

[0006] (2) The current mine hoisting adopts the way of matching the tank road and the tank ear to guide the skip, but with the increase of the hoisting depth, during the construction process, the straightness of the tank road on one side and the parallelism of the tank road on both sides It is difficult to guarantee, and the tank road is in a humid environment for a long time, which is prone to structural deformation. Therefore, during the lifting process of ultra-deep wells, the reliability of the form of cooperation between the tank road and the tank ear is not high

[0009] (1) Steel wire ropes are usually subjected to heavy loads and are subject to great tensile stress and bending stress. However, due to the limitations of materials and specifications of steel wire ropes, the maximum tensile stress and bending stress are certain. With the increase of lifting load , the skip is developing towards super-large tonnage, the mechanical properties of the steel wire rope cannot be infinitely increased, and the increase in the lifting load will also seriously shorten the life of the steel wire rope, making it scrapped in advance

[0010] (2) The existing skip lifting system relies on the lifting drum to drive the wire rope to complete the lifting work. In order to increase the lifting tonnage of the skip, the volume of the lifting drum and the power of the main hoisting motor are also increasing. Other supporting facilities The volume also needs to be increased accordingly, which greatly increases the difficulty of construction and the cost of operation and maintenance of the mine main shaft skip lifting system

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