Hydraulic system for automatic tensioning device of belt pulley

Abstract

The invention discloses a hydraulic system for an automatic tensioning device of a belt pulley. The hydraulic system comprises a hydraulic cylinder, a hydraulic pump, an electromagnetic proportion valve block, an energy storing device and a pressure relay; an oil outlet of the hydraulic pump respectively communicates with the energy storing device and a first working end port of a second directional valve; a second working end port of the second directional valve communicates with a rod port of the hydraulic cylinder; a head port of the hydraulic cylinder communicates with a third working end port of the second directional valve; a fourth working end port of the second directional valve communicates with an oil tank; the rod port of the hydraulic cylinder communicates with the oil outlet of the hydraulic pump through the electromagnetic proportion valve block, a first directional valve and a third directional valve in a sequence, wherein the first directional valve and the third directional valve are connected in parallel; a pressure relay is mounted at an end port of the energy storing device. The hydraulic system for the automatic tensioning device of the belt pulley has the characteristics of being reasonable in design, capable of adaptive tensioning, high in adaptability and stability, high in automation degree, high in intelligent degree, long in service life, and wide in applicable scope.

Description

technical field [0001] The invention belongs to the technical field of hydraulic drive and relates to a hydraulic system, in particular to a hydraulic system for driving pulleys to automatically tension. Background technique [0002] With the development of my country's mining and metal smelting industries, belt conveyors continue to develop in the direction of high speed, long distance, large capacity and high power. The dynamic characteristics of belt conveyor systems are increasingly prominent. The requirements for pulley tensioners are getting higher and higher. The tensioning device should automatically respond quickly according to the different operating states of the conveyor belt to overcome the hysteresis of the conveyor belt, thereby effectively ensuring the normal operation of the belt conveyor. At present, tensioning devices widely used in reality include hammer type tensioning devices, fixed tensioning devices and hydraulic tensioning devices, etc., but none of ...

AI Technical Summary

Problems solved by technology

At present, tensioning devices widely used in reality include hammer type tensioning devices, fixed tensioning devices and hydraulic tensioning devices, etc., but none of these tensioning devices can achieve self-adaptive tensioning.

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