The composition of the hydraulic system
Truck Crane hydraulic system including upper body hydraulic system and the lower system in two parts. The lower hydraulic system including pumps and outrigger hydraulic cylinders, and the upper hydraulic systems , including lifting hydraulic motors, rotary hydraulic motor, luffing hydraulic cylinders, telescopic hydraulic cylinders and oil filters, pipes, seals and other parts.
Off the hydraulic system of the leg mechanism is divided into front leg and leg mechanism after two parts, the leg is release by directional valve to change the direction of the hydraulic oil. Leg system reversing valve generally have 3 three gear, when reversing valve to the upper, the hydraulic oil flow to the leg of hydraulic cylinder, hydraulic cylinder; When reversing valve moves to the next place, the hydraulic oil to the hydraulic oil tank, the hydraulic oil cylinder contraction. Hydraulic lock is a lock in the hydraulic oil, to prevent the hydraulic oil leak caused by the work is not stable.
The upper body hydraulic system, including lifting hydraulic motors, rotary hydraulic motors, hydraulic luffing cylinders, telescopic hydraulic cylinders and oil filter, pipe, seals and other parts. In the vehicle hydraulic system, valve remains is to change the role to achieve the rotation direction of the hydraulic oil, telescopic crane, luffing and promotion purpose of the object. In addition valve outside, the car will be used in the hydraulic system and the role of different types of control valves, such as stretching, luffing and hoisting mechanism requires balancing valves to balance the various parts of the pressure to maintain the stability of the work.
Lifting systems also need to throttle, throttle valve port by changing the length of the channel to change the size or hydraulic resistance, flow through the control valve, with the lifting mechanism of the brake can be raised or lowered smooth cargo stopping the desired height, or to control or enhance the rate of decline.
