Bidirectional constant-speed internal-circulation hydraulic system

Abstract

The invention discloses a bidirectional constant-speed internal-circulation hydraulic system, which belongs to the field of hydraulic systems. The hydraulic system comprises an absorbed-oil filter, a return-oil filter, an oil pump, a check valve, a system safety valve, an electromagnetic directional valve I, an electromagnetic directional valve II, a balancing valve I, a balancing valve II, an electromagnetic directional valve III, an electromagnetic directional valve IV, a shuttle valve I, a shuttle valve II, a motor I, a motor II, an executing mechanism and an electromagnet S, wherein the oil pump absorbs oil from an oil tank through the absorbed-oil filter, and an outlet of the oil pump is respectively connected to the ports P of the electromagnetic directional valves I and II, the system safety valve and the ports T of the electromagnetic directional valves III and IV through the check valve. The system can guarantee the speeds and strengths of retracting and releasing to be consistent and the safety and reliability in the processes of retracting and releasing when an alternative retracting and releasing system works; and the hydraulic system is acted by external forces, and hydraulic oil adopts an internal-circulation inner-supply technique, so that power loss is reduced, and energy is saved.

Description

technical field [0001] The invention relates to a hydraulic system, in particular to a bidirectional and same-speed internal circulation hydraulic system. Background technique [0002] In some alternate retracting systems, which are generally used in mining rope feeding devices, although the retracting and releasing speeds are opposite during operation, it is required that the retracting and releasing speeds must be the same, and the retracting force is basically the same as the releasing force. The technology currently used is mainly to use a hydraulic system of equal displacement to supply oil to the two actuators that are retracted and released, so that the speed of retracting and releasing is basically the same; but when this type of hydraulic system is released, the actuator is actively released. Therefore, it is impossible to ensure that the retracting and releasing forces are consistent; in addition, this type of hydraulic system has a large power loss during actual o...

AI Technical Summary

Problems solved by technology

The technology currently used is mainly to use a hydraulic system of equal displacement to supply oil to the two actuators that are retracted and released, so that the speed of retracting and releasing is basically the same; but when this type of hydraulic system is released, the actuator is actively released. Therefore, it is impossible to guarantee that the power of retraction and release is consistent; in addition, because of the large flow and power of the hydraulic system, the power loss in the actual operation process of this type of hydraulic system is relatively large.

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