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Composition of hydraulic couplers
Nov 14, 2017

A non-rigid coupling of liquid as working medium, also known as hydraulic coupling.

The pump wheel and turbine of the hydraulic coupler form a closed working chamber that allows the liquid to circulate, the pump wheel is mounted on the input shaft, and the turbine is mounted on the output shaft.

When the engine (internal combustion engine, motor, etc.) drives the input shaft, the liquid is thrown out by the centrifugal pump.

The high speed liquid enters the turbine and pushes the turbine to rotate, transferring energy from the pump to the output shaft.

The final liquid returns to the pump, forming a cyclical flow.

The fluid coupler depends on the interaction between the liquid and the pump wheel and the blades of the turbine to produce the torque.

Its output torque is equal to the input torque minus the friction torque, so its output torque is less than the input torque.

The hydraulic coupler input shaft and output shaft are connected by liquid, and there is no rigid connection between the working members.

The characteristics of hydraulic coupler are: can eliminate shock and vibration;

The output speed is lower than the input speed, and the speed difference between the two axes increases with the increase of load.

The overload protection performance and starting performance are good. When the load is too large, the input shaft can be rotated without causing damage to the engine.

When the load is reduced, the output axis speed increases until it is close to the speed of the input shaft.

The transmission efficiency of the hydraulic coupler is equal to the output torque multiplied by the output torque (output power) and the input torque (input power) ratio.

The normal operating speed of the hydraulic coupler can be higher than that of 0.95.

The characteristics of hydraulic coupler are different due to different shape of working chamber and pump wheel and turbine.

If the oil of the hydraulic coupler is released, the coupler is in a disengaged state and can play a clutch role.