Forklift hydraulic system with adjustable safety pressure under multiple working conditions

• Main Authors: WANG YING, WANG SHUAI, WANG JIANFENG, XU CHUNXIANG, XIE GUOSHENG, LOU CHENGYE, ZHANG YUAN, WU QINGBO, DU XIONG
• Format: Patent
• Language: Chinese; English
• Published: 04.04.2023
• Subjects: BLASTING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; HAULING; HEATING; HOISTING; HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDEDFOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCEDIRECTLY TO THE SURFACE OF A LOAD; HYDRAULICS OR PNEUMATICS IN GENERAL; LIFTING; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TRANSPORTING; WEAPONS

The multi-working-condition safety pressure adjustable forklift hydraulic system comprises an oil tank, an oil pump and a priority compensation valve, an output port of the oil pump is connected with an inlet of the priority compensation valve, two outlets of the priority compensation valve are connected with an inlet of a main switch valve and an inlet of an auxiliary switch valve respectively, and an outlet of the main switch valve is connected with a main oil way working port of the system. The oil way between the oil pump and the priority compensation valve is connected with the oil tank through the main overflow valve, the oil way between the auxiliary switch valve and the auxiliary oil way working port is connected with the oil tank through the proportional overflow valve, and the overflow pressure parameter of the proportional overflow valve is adjusted according to the working condition of the auxiliary oil way working port. According to the multi-actuator valve block, the flow of each linkage of an a