Low-energy consumption and low-heat constant pressure system of full-hydraulic crane for ship

Abstract

The invention discloses a low-energy consumption and low-heat constant pressure system of a full-hydraulic crane for a ship, and belongs to the field of cranes. The constant pressure system consists of a hydraulic oil pump system and an electric control system, wherein a high-pressure oil pump of the hydraulic oil pump system is a constant-pressure variable oil pump with a remote pressure control function; an electric proportional overflow valve is arranged at a remote pressure control oil port end of the constant-pressure variable oil pump; working oil ports of a hydraulic motor are connected with a hydraulic control proportional reversing valve; an oil outlet of a shuttle valve in the hydraulic control proportional reversing valve obtains the pressure of a high-pressure cavity of the hydraulic motor; an outlet of the shuttle valve is correspondingly connected with a pressure sensor; the load working pressure is detected and returned in real time through the pressure sensor; and the control system automatically sets up the input of a current value of a proportional electromagnet of the electric proportional overflow valve according to the returned pressure so as to finish automatic tracking and setting of a constant-pressure variable point of the oil pump. The organic synthesis of electric and hydraulic technologies is used to effectively solve the problem of high energy consumption due to load variation in the constant pressure system; and the system is simple in composition and control, and has excellent energy-saving and consumption-reducing effects.

Description

technical field [0001] The invention discloses a low energy consumption and low heat generation constant pressure system for a marine full hydraulic crane, which belongs to the field of cranes. Background technique [0002] Full hydraulic cranes for ships in my country often use medium and high pressure constant pressure systems. Through the constant pressure variable oil pump, it is convenient to realize low load pressure and large flow rate under fast working conditions; high load pressure and low flow rate under rated load. [0003] The power loss of the constant pressure variable oil pump is mainly throttling loss. In the working condition of a certain mechanism speed, if the load of the mechanism varies widely, the system will have a large space for energy waste. The smaller the load of the mechanism, the smaller the load pressure, the greater the power loss, and the more serious the system heat. Therefore, large-tonnage crane ships often have to be equipped with coo...

AI Technical Summary

Problems solved by technology

Due to the large limitations of hierarchical control, and certain factors of human selection must be involved in the operation, it cannot effectively solve the heating problem caused by variable loads.

Images