Method for calculating holding pressure of telescopic oil cylinder of automatic tensioning system of conveyor chain

Abstract

The invention provides a method for calculating the holding pressure of a telescopic oil cylinder of an automatic tensioning system of a conveyor chain. A current detection unit is installed on a tail motor of a conveyor, a pressure detection unit is installed in the telescopic oil cylinder at the tail, and the current detection unit, the pressure detection unit, the tail motor, the telescopic oil cylinder and a hydraulic system are all connected to a main controller; no-load measurement is carried out firstly to obtain a low-level current value and a pressure value, then full-load measurement is carried out to obtain a high-level current value and a pressure value, then the theoretical value of the holding pressure is calculated through an equation, the holding pressure of the telescopic oil cylinder is controlled by comparing the actual detection value with the theoretical value, and then the tensioning force of the chain is adjusted; and the service life of the chain and the service life of a driving component are effectively prolonged, and energy conservation and consumption reduction are facilitated.

Description

technical field [0001] The invention relates to the field of fully mechanized mining in coal mines, in particular to a calculation method for maintaining pressure of a telescopic oil cylinder in an automatic chain tensioning system of a conveyor. Background technique [0002] The scraper conveyor in the fully mechanized mining face of the coal mine is the core equipment for coal material transportation, and cooperates with the shearer and the hydraulic support to complete the coal mining task of the fully mechanized mining face. [0003] With the continuous development of intelligent, efficient and rapid mining technology, the requirements for scraper conveyors in terms of intelligence, transmission power, reliability and safety are constantly increasing. The chain is an important part of the scraper conveyor. The motor drives the chain to drive the scraper to reciprocate, and then completes the task of conveying coal. The chain is an elastic object. After bearing the weigh...

AI Technical Summary

Problems solved by technology

[0004] When the chain is too tight, the wear and tear will increase, which will cause chain breakage; when the chain is too loose, it will cause chain stacking, chain jamming, and tooth jumping, which will affect the normal operation of the equipment

Manual inspection is required on a regular basis. When the chain is too tight, the chain is added, and when the chain is too loose, the chain is reduced. The underground operation is troublesome and laborious.

[0005] In order to avoid frequent operations of adding and subtracting chain links, many transport aircraft manufacturers have installed telescopic tails, and there is an additional telescopic oil cylinder on both sides of the telescopic tail. The purpose of the chain tightness, but this method still needs manual regular inspection for operation, and the chain tightness cannot be adjusted in real time as the working conditions change, and the correlation with the working conditions is not high

[0006] For example, in the invention patent with the patent number 201410147453.7 and the invention name of the fully mechanized mining face automatic tensioning device and its control method, it is recorded that a pressure monitoring device and a displacement monitoring device are used to realize the pressure control of the tail actuator, and then Control the tension of the chain, but its main problem is that the pressure value of the tail actuator is preset, the load of the conveyor is constantly changing during the working process, and the most suitable tension will also change when the load changes. This method is the same as The correlation of actual working conditions is not high, and the range of maintaining pressure cannot be adjusted with real-time working conditions

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