Do You Learn About The Travel Motor Of Excavator?

The hydraulic pump of the excavator is the source of power that converts the mechanical energy generated by the engine into hydraulic energy. The hydraulic oil is the medium of power transmission, and the travel motor is the executive part, which converts the hydraulic energy into mechanical energy to achieve walking. Hydraulic pump is one-way rotation flow adjustable. And the travel motor is two - way rotation two - step speed regulation

The hydraulic pump converts the mechanical energy of the engine into hydraulic energy to realize the linear motion of the piston rod of the hydraulic cylinder, and the motor converts the hydraulic energy of the pump output into mechanical energy to drive the excavator to walk. A pump and a motor are similar in structure, only for opposite purposes.

The weight of medium and large crawler excavators is generally above 20t, and the inertia of the machine is very large. In the process of starting and stopping the machine, the hydraulic system will have a relatively large impact. Therefore, the walking control system must be improved to adapt to this working condition.

Travel motor generally adopts high speed motor and planetary reducer or cycloid reducer, and the control of hydraulic motor loop has its own characteristics. The motor is equipped with high pressure automatic variable device, when hanging high speed gear, the loop takes over the oil port of the dynamic variable speed, and pushes the variable speed valve to move left, so that the motor becomes small displacement; If the driving resistance increases and the oil pressure rises to the set value, the oil pushes the variable speed valve to the right, and the motor automatically turns into a large displacement low speed block to increase the torque. So this kind of motor can change gear automatically with the change of walking resistance.

1)Walking power transmission route: diesel engine -- coupling -- hydraulic pump -- distribution valve -- central rotary joint -- walking motor -- reducer -- driving wheel -- track chain track -- realize walking;

2)Transmission route of rotary movement: diesel engine -- coupling -- hydraulic pump -- distribution valve -- rotary motor -- reducer -- rotary bearing -- rotary;

3)Transmission route of boom movement: diesel engine -- coupling -- hydraulic pump -- distribution valve -- boom cylinder -- realize boom movement;

4)Bucket rod movement transmission route: diesel engine - coupling - hydraulic pump - distribution valve - bucket rod cylinder - bucket rod movement;

5)Bucket movement transmission route: diesel engine - coupling - hydraulic pump - distribution valve - bucket cylinder - bucket movement.

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