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What are the characteristics of rotary digging teeth
2022/08/26
In the existing mining equipment in our country, whether it is a shearer or a roadheader, the rotary digging teeth used are composed of a pick head and a pick body. The front end of the pick head is roughly a single cone structure. When the coal seam is mined and cut, the resistance is large, and it is easy to generate a large amount of heat, which accelerates the wear of the pick head of the rotary digging teeth, and also causes the mining machinery to consume a lot of power.
With the increase of wear intensity, when the tip of the coal mining rotary digging teeth is ground into a blunt shape, the friction force is greater, the wear of the coal shearer head is further accelerated, and the power consumption of the coal mining machinery is further increased. At the same time, due to the severe eccentric wear of the rotary digging teeth, a series of problems such as rapid failure and short life of the pick are caused. Therefore, it is very necessary to develop a new type of rotary digging teeth with high wear resistance and impact resistance.
In order to solve the serious technical problem of local wear of the existing rotary digging teeth during use, some rotary digging tooth manufacturers have proposed the technology of rotating picks: the use of auxiliary alloy blocks and auxiliary alloy grooves arranged at the tail can effectively make the cutting The tooth body is used to generate a reaction force in the axial direction of the pick to make the pick body rotate by itself, which improves the crushing effect and reduces the single-sided wear of the pick body, thereby prolonging the service life of the pick. At the same time, the structure of the pick is relatively simple, easy to process, and suitable for large-scale promotion.
Compared with other picks, the rotary pick has three main features: 1. The outer surface of the auxiliary alloy block of the rotary pick is provided with a non-sparking wear-resistant layer to improve the safety of the pick during use. 2. The outer surface of the auxiliary alloy groove of the rotary digging tooth is provided with a non-sparking wear-resistant layer, which can also prevent the generation of sparks. 3. The angle of the auxiliary alloy block of the rotary digging teeth is between 130° and 160°. An accurate calculation of the angle will aid in the rotation of the pick.
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2022/08/26
2022/08/26
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2022/08/26
