A hydraulic control system for a side loading and unloading crane

Abstract

The invention discloses a hydraulic control system of a side loading and unloading crane. The hydraulic control system comprises a double-discharge hydraulic pump (2), wherein the double-discharge hydraulic pump (2) is connected with an engine (1), consists of a hydraulic pump I (2-1) and a hydraulic pump II (2-2), and is connected with a multi-way directional control valve (5) through a load adaptive convergence valve (3), and the multi-way directional control valve (5) is connected with executing mechanisms (9). The hydraulic control system disclosed by the invention has the advantages that the switching of action speeds of the executing mechanisms of the crane can be realized under different load pressures, the maximum output power of the engine can be reduced and the system cost and the system heat amount are reduced; without need of an independent electric control system, the maximum output power and the speed switching of the engine in the whole operation process can be reduced only by virtue of the load adaptive convergence valve, and the system is simple and reliable; the maximum working pressure of the hydraulic control system can be transferred, the actions of all the executing mechanisms can be further accurately controlled, and the safe stability and the synchronism of lifting operation are guaranteed; and the service life of the elements of the system are prolonged.

Description

technical field [0001] The invention relates to a hydraulic control system of a side loading and unloading crane, which belongs to the technical field of hydraulic control of side loading and unloading cranes. Background technique [0002] The side loading and unloading crane is a lifting device that fixes the front and rear cranes to the semi-trailer or the chassis of the car for side loading and unloading operations. It is mainly used for loading and unloading containers of various specifications. Usually, when carrying out light-load hoisting, in order to improve work efficiency, the actuator is required to move quickly; when carrying out heavy-load hoisting, in order to ensure stability and safety, the actuator is required to operate at a low speed. At present, most quantitative pump hydraulic systems control the action speed of construction machinery actuators by using valve-controlled throttling to control the action speed of the actuator. In this way of throttling, t...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned problems in the prior art, the present invention provides a hydraulic control system for side loading and unloading cranes, which can not only solve the problem of switching between high and low speeds of side loading and unloading cranes under different load conditions, but also significantly improve the utilization of the tractor engine output power rate, reducing system cost and system heat

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