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The Composition Of The Hydraulic Coupler
Sep 12, 2017


A non-rigid coupling, also known as a hydraulic coupling, with a liquid working medium. The pump coupler and the turbine of the hydraulic coupler form a closed working chamber which allows the liquid to circulate. The pump wheel is mounted on the input shaft and the turbine is mounted on the output shaft. Power (internal combustion engine, motor, etc.) to drive the input shaft rotation, the liquid was centrifugal pump wheel thrown out. This high-speed liquid enters the turbine and then drives the turbine to rotate, passing the energy from the pump wheel to the output shaft. The final liquid returns to the pump wheel, forming a cycle of flow. The hydraulic coupler interacts with the pump wheel and the blade of the turbine to produce a change in momentum moments to impart torque. Its output torque is equal to the input torque minus the friction torque, so its output torque is always less than the input torque. 


The hydraulic coupler input shaft and the output shaft are connected with the liquid, and there is no rigid connection between the working members. Hydraulic coupler is characterized by: to eliminate the impact and vibration; output speed is lower than the input speed, the two shaft speed difference increases with the load increases; overload protection performance and start performance, the load is too large and stop The shaft can still be rotated without causing damage to the power machine; when the load is reduced, the output shaft speed increases until it is close to the input shaft speed. The transmission efficiency of the hydraulic coupler is equal to the output shaft speed multiplied by the output torque (output power) multiplied by the input shaft speed by the input torque (input power). General hydraulic coupler in the normal working conditions of the speed ratio of 0.95 or more can get a higher efficiency. The characteristics of the hydraulic coupler are different due to the difference between the working chamber and the pump wheel and the turbine. If the hydraulic coupling of the oil vent, the coupler is in the disengaged state, can play the role of clutch.