Parking brake hydraulic control system and method special for diamond arm excavator

• Main Authors: LIU SONGYANG, LI XIANJUN, ZHOU XIAN, TANG XIAOPENG, LI WENQI, LIU DENG, LYU JIANSEN, SHI LIJING, SHI JIJIANG
• Format: Patent
• Language: Chinese; English
• Published: 09.02.2024
• Subjects: ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; DREDGING; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; PERFORMING OPERATIONS; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES; SOIL SHIFTING; TRANSPORTING; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES; VEHICLES IN GENERAL

The invention discloses a parking braking hydraulic control system and method special for a diamond arm excavator. The parking braking hydraulic control system comprises a main pump, a walking reversing valve, a walking motor and a driving wheel. A locking pin and a brake oil cylinder B are arranged on one side of the driving wheel; a friction disc assembly and a brake oil cylinder A are arranged on one side of the walking motor; the system further comprises a pilot pump, an electromagnetic valve, a high-pressure hydraulic control valve, a shuttle valve, a one-way valve and a low-pressure hydraulic control valve. The control end of the high-pressure hydraulic control valve is connected with the shuttle valve, and the control end of the low-pressure hydraulic control valve is connected with the electromagnetic valve. According to the system, high-low pressure cross control is adopted, multiple choices of parking braking modes of the excavator are achieved, and the two parking modes operate independently and do