Working principle of excavator running motor
Does the landlord complicate the simple problem?Principle is that the engine with a hydraulic pump in the transmission, walking motor in the drive gear drive chainSay so complex, who can understand?
Excavator motor principle: the large crawler excavator machine weight is generally above 20t, machine inertia, in the process of starting and stopping of the machine will bring bigger impact to the hydraulic system, therefore, must improve the walking control system to adapt to this condition.The motor generally adopts high speed motor plus planetary reducer or cycloidal pin gear reducer, while the control of the loop of the hydraulic motor has its characteristics. Walking motor control loop shown in Figure 1, the motor is equipped with a high-pressure automatic variable device, when hung high gear when the circuit is connected with the manual transmission oil to oil, promote the transmission valve moves to the left, the motor for small displacement; if the driving resistance increases the pressure rises to the set value, the oil valve drive transmission right for large displacement, low gear automatic variable motor, to increase the torque. Therefore, the motor can automatically change gears as the walking resistance changes.
