Automatic tensioning device of belt type conveyor

Abstract

The invention relates to an automatic tensioning device of a belt type conveyor, which mainly solves the technical problem of the improvement of the dynamic force-transferring property, the reliability and the like of the clutch and the one-way brake. The automatic tensioning device has the technical scheme that a shaft shoulder of a clutch shaft is fixedly connected with a baffle disc; the inner diameter and the outer diameter of the working surface of the baffle disc are equal to or similar to the inner diameter and the outer diameter of the corresponding working surface of a piston. The output shaft of the one-way brake forms an integral structure, and is suitable for the automatic tensioning devices of belt type conveyors of various types.

Description

Technical field: [0001] The invention relates to a transport device, in particular to an assembly of a belt conveyor. Background technique: [0002] Belt conveyors are widely used in underground transportation of coal mines, and are also used in open-pit coal mines or coal preparation and other workplaces. The tensioning device is an important part of the belt conveyor, and its performance directly affects the technical performance and reliability of the belt conveyor. The performance index and the service life of the tape; the early tensioning devices used structural forms such as heavy hammers, spirals or fixed winches. Although their structures and controls were simple, their tensioning strokes were short and the tensioning force could not be adjusted; in view of this shortcoming, the industry provided The tensioning device of the electric winch and hydraulic winch with adjustable tension, but this kind of structure has the disadvantages of non-adjustable tension or slow ...

AI Technical Summary

Problems solved by technology

[0002] Belt conveyors are widely used in underground transportation of coal mines, and are also used in open-pit coal mines or coal preparation and other workplaces. The tensioning device is an important part of the belt conveyor, and its performance directly affects the technical performance and reliability of the belt conveyor. The performance index and the service life of the tape; the early tensioning devices used structural forms such as heavy hammers, spirals or fixed winches. Although their structures and controls were simple, their tensioning strokes were short and the tensioning force could not be adjusted; in view of this shortcoming, the industry provided The tensioning device of the electric winch and hydraulic winch with adjustable tension, but this kind of structure has the disadvantages of non-adjustable tension or slow response speed, easy leakage and low reliability during operation; With the development in the direction of large transport capacity and high belt speed, the automatic tensioning device has been developed for a long time. Its operating characteristics are that the tension force can be adjusted, controlled and measured in real time, and the response speed, response accuracy and tension For tight travel, such as the technical solutions provided by the former Soviet Union, Japan and other related companies, they all have a typical automatic tensioning function, especially the products provided by the ACE company in Australia, which have more outstanding advantages. The technical solutions of this product are as follows: image 3 As shown, it includes PLC controller 101, hydraulic system 102, motor 103, gearbox 104, clutch 1', one-way brake 2', brake 105, reducer 106, drum 107 and tension sensor 108, with manual, automatic and There are three operation modes of tape winding, and the operation is easy, and it has a complete monitoring and protection system, such as clutch slipping, motor overspeed, hydraulic system pressure temperature and tension overrun protection, and tension trolley limit operation and other monitoring and protection functions, but this There are still some structural problems in the product, such as the key components of the clutch 1' to transmit torque - piston, friction plate and shaft retaining ring assembly. When the clutch 1' is engaged and operated, the internal force of the hydraulic pressure makes the piston push toward The friction plate group, the axial retaining ring restricts the axial movement of each friction plate and compresses each other, so that the power of the transmission gear is transmitted to the transmission shaft through the gear sleeve and the friction plate. The structural characteristics of the above transmission parts are that the force transmission piston The outer diameter is equal to the effective outer diameter of the friction plate, while the retaining ring for the shaft is a standard part, and its outer diameter is much smaller than the effective outer diameter of the friction plate. The uneven force is not conducive to the transmission of torque, and the structure of each friction plate will also be seriously damaged, such as local heating and wear of the friction plate, the inner and outer edges of the teeth are broken or worn, and related components are prone to failure during operation. The service life will also be significantly shortened as a result, and these factors directly affect the reliability and safety of the automatic tensioner; another problem with the ACE company's products is the one-way brake 2', whose structural feature is that the output shaft of the most important component consists of two sections The two sections are connected by splines to form a whole. Although this structure can shorten the length of a single piece of the shaft, its structure is complex, the manufacturability is poor, and the manufacturing cost is high. Moreover, this combined structure will reduce the rigidity of the shaft and cause Corresponding faults, reducing the reliability of the drive train

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