Novel hydraulic driving system for scraper conveyer

Abstract

The invention relates to a hydraulic driving system, in particular to a novel hydraulic driving system for a scraper conveyer, which aims to the overcome the defect that as the existing scraper conveyer is commonly driven by a two-speed motor, a single speed motor plus a hydraulic coupling, a variable-frequency motor and the like, when a motor, a transmission device and a chain wheel are connected with one another, the tail part is suspended, resulting in easy generation of vibration, abrasion, invalid sealing and the like. The novel hydraulic driving system consists of a hydraulic motor, a shuttle valve, a safety valve, an overflow valve, a proportional reversing valve, a flow type cartridge valve, a load sensing valve, a pressure cutoff valve, a variable piston, a variable pump and a motor. The novel hydraulic driving system has the beneficial effects that the soft start of the scraper conveyer is realized by applying a load sensing system, a variable pump-quantitative motor type volume speed control circuit and a flow type proportional cartridge valve control element; the rotating speed of the hydraulic motor can be controllable, can also be subjected to stepless speed regulation within a certain scope and is not affected by load change and motor rotating speed fluctuation; and the working requirements on high pressure and large flow rate of the system are satisfied, and equipment operation and braking are ensured to be stable and reliable.

Description

technical field [0001] The invention relates to a hydraulic drive system, in particular to a novel hydraulic drive system of a scraper conveyor. Background technique [0002] The scraper conveyor is the key equipment for underground coal transportation in coal mines. As the driving device of the scraper conveyor is the power system of the scraper conveyor, the rationality and reliability of the design are very important. At present, the scraper conveyor usually adopts two-speed motor drive, single-speed motor plus hydraulic coupling drive and variable frequency motor drive, etc., each has advantages and disadvantages in application, and its common disadvantage is that the motor and transmission device are connected with the sprocket, and the tail is suspended. The connection strength and neutrality requirements are high, and problems such as vibration, noise, wear, heat generation, and seal failure are prone to occur; the unloading height of the scraper conveyor is difficult...

AI Technical Summary

Problems solved by technology

At present, the scraper conveyor usually adopts two-speed motor drive, single-speed motor plus hydraulic coupling drive and variable frequency motor drive, etc., each has advantages and disadvantages in application, and its common disadvantage is that the motor and transmission device are connected with the sprocket, and the tail is suspended. The connection strength and neutrality requirements are high, and problems such as vibration, noise, wear, heat generation, and seal failure are prone to occur; the unloading height of the scraper conveyor is difficult to reduce, making it difficult to realize the mining of thin coal seams, and the drive motor needs to be laid over a long distance Large-capacity cables lead to bulky nose and tail, making it difficult to disassemble and maintain in the narrow space underground

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