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The Working Principle Of Hydrodynamic Coupler
Jun 29, 2017

Hydraulic coupler is a kind of non rigid coupling with liquid as working medium. The pump wheel and turbine of the hydraulic coupler (see diagram) Form a closed working chamber which can circulate the liquid, the pump wheel is mounted on the input shaft, and the turbine is mounted on the output shaft. The two rounds, which are arranged along the radial line of many blades, are arranged in opposite directions, with no contact between each other, with a gap of 3mm to 4mm in the middle, and a doughnut-shaped work wheel. The drive wheel, called the pump Wheel, is driven by a wheel called a turbine, and the pump wheel and turbine are all called work wheels. After the pump wheel and the turbine are fitted, the annular cavity is formed, which is filled with working fluid.

The pump wheel usually rotates under the internal combustion engine or the motor drive, the vane drives the oil liquid, under the centrifugal force action, these oil liquid is dumped to the pump wheel blade edge, because the pump wheel and the turbine radius are equal, therefore when the pump wheel speed is bigger than the turbine speed, the hydraulic pressure of the outer edge of the impeller blades is greater than that of the turbine blades, and as the pressure difference liquid shocks the turbine blades, when sufficient to overcome the outer resistance, the turbine starts to rotate, that is, the kinetic energy is transmitted to the turbine and the turbine rotates in the same direction as the pump wheel. The fluid kinetic energy drops back from the blade edge of the turbine to the pump wheel, forming a circulation loop, and its flow path is like a ring-and-tail spiral. The hydrodynamic coupler transmits torque by the interaction of the liquid with the impeller and turbine blades to produce a moment of momentum. The output (turbine) torque equals the torque of the input (pump wheel) when ignoring the wind loss and other mechanical losses of the impeller rotation.