Fault diagnosis system and method for pressure change-over valve

• Main Authors: HU LIANG, HU XIANGYU, ZHANG BO, GUO ZHEN, LIU MEI, FAN GUIXIN, CAI TIAN, YANG WEIJUN, CAO HONGFA, ZHAO HONGWEI, PAN XINGHE, HE KAI, KONG DESHUAI, WANG QUNWEI
• Format: Patent
• Language: Chinese; English
• Published: 14.05.2024
• Subjects: MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention provides a fault diagnosis system and method for a pressure change-over valve, and the system comprises a running-in test bench which is used for placing the pressure change-over valve and can control the pressure change-over valve so as to achieve the switching of the pressure change-over valve among three working states: braking, pressure maintaining and relieving; the valve port fault diagnosis device comprises a valve port tool connected to a valve port of the pressure conversion valve and an air pressure acquisition module connected with the valve port tool; and the signal acquisition and identification unit is electrically connected with the running-in test bench to receive a working state signal of the pressure conversion valve, and the signal acquisition and identification unit is electrically connected with the air pressure acquisition module to receive a pressure signal at a valve port of the pressure conversion valve. The problem that the fault state and the fault point of the valve p