The main hydraulic circuit includes an oil absorbing circuit, a water supply circuit, an oil return circuit, and a leakage circuit hydraulic system comprising one main pump, 1 control valve, 1 swivel motor, 4 cylinders and 2 walking motors placing a slanting plate regulator Adjust the tilt angle, change drainage and pressure.
1, oil absorbing circuit and oil supply circuit
The oil of the pressurized tank is supplied to the pump through the oil filter. Oil flows from the pump to the control valve.
The oil output from the main pump flows into the brake through the control valve. Control Valve Controls Hydraulic Functional Brake through the control valve and oil cooler flow to the hydraulic tank
2, return oil circuit
Hyundai excavator returning the oil circuit, returning from the backlap of each brake through the control valve to the hydraulic tank.
The backlap circuit is equipped with a bypass single-way valve. The pressure of the bypass single-way valve is 30kgm2 and 5: 0kgcm2. Typically, when the return oil returns from the left control valve to the hydraulic oil tank oil, when the oil cooler is low, the viscosity of the oil becomes large and the fluid resistance is also increased. When the oil pressure exceeds 5.0 kgf / cm, the oil is directly returned to the hydraulic tank, causing the oil temperature to raise rapidly within a certain range.
When the oil cooler is blocked, the oil is returned directly to the hydraulic tank by the bypass single-to-valve (1). Hydraulic fuel tanks are equipped with a full oil filter and a bypass range.
From the left and right ends of the control valve and filtered by the full oil filter. The folding flap is equipped with a bypass flap with a bypass filter element, and the bypass flap is hit by a pressure of 1.5 kgf / cm2, leaking loop.
In addition to the oil from the motor and main pump, the oil is also leaking from the lubrication loop. These oils must be flowed through the rotary filter to the hydraulic tank
When the leak oil pressure exceeds 1.5kgcm2, the oil directly returns the hydraulic tank
1. Walking motor leakage circuit left and right traveling oil flows out of the leak opening in the motor shell. These oils are returned to the hydraulic tank after the central rotary joint.
2. Rotary motor leaks the loop the turning motor leakage oil returns to the hydraulic tank with the oil of the walking circuit.
3. Main pump leak loop returns to the hydraulic tank from the oil leakage of the main pump.
