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hydraulic coupling speed regulating coupling equipment

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Hydraulic coupler, also known as hydraulic coupling, is a kind of power source (usually the engine or motor) connected with the working machine, by liquid torque change transfer torque hydraulic transmission device.

According to the different uses, hydraulic couplers are divided into common type hydraulic couplers, torque limited type hydraulic couplers and speed control type hydraulic couplers. The torque limited hydraulic coupler is mainly used for the motor reducer start protection and impact protection in operation, position compensation and energy buffer; Speed regulating type hydraulic coupler is mainly used to adjust the input and output speed ratio, other functions and torque limit type hydraulic coupler is basically the same.

According to the different number of working cavities, the hydraulic couplers are divided into single working cavity hydraulic couplers, double working cavity hydraulic couplers and multi-working cavity hydraulic couplers. According to the different blades, hydraulic couplers are divided into radial blade hydraulic couplers, inclined blade hydraulic couplers and rotary blade hydraulic couplers.

Working principle of hydraulic coupler

Hydraulic coupler is a non-rigid coupling with liquid as the working medium. The pump wheel and turbine of the hydraulic coupler constitute a closed working chamber that can make the liquid circulate. The pump wheel is installed on the input shaft and the turbine is installed on the output shaft. The two wheels are half rings with many blades arranged along the radial direction. They are coupled to each other, and do not touch each other. There is a gap of 3mm to 4mm in the middle, and they form a circular working wheel. The driving wheel is called the pump wheel, the driven wheel is called the turbine, and both the pump wheel and the turbine are called the working wheel. After the pump wheel and turbine are assembled, a ring cavity is formed, which is filled with working oil.

Pump wheel is usually revolve driven by internal combustion engine or motor, blade drive oil, under the action of centrifugal force, the oil is flung to the pump impeller blade edge, because the radius of the pump wheel and turbine are equal, so when the speed of the pump wheel is greater than the turbine speed, pump impeller blade tip of the hydraulic pressure is greater than the hydraulic turbine blade tip, liquid impact turbine blades, due to the pressure difference when enough to overcome the resistance, When the turbine starts to rotate, the kinetic energy is transferred to the turbine and the turbine rotates in the same direction as the pump wheel. When the kinetic energy of the oil drops, it flows from the blade edge of the turbine back to the pump wheel, forming a circular loop, whose flow path is like a circular spiral line connected end to end. Hydraulic coupler depends on liquid and pump wheel, turbine blade interaction to generate torque changes to transfer torque. The output (turbine) torque is equal to the input (pump wheel) torque when the wind damage and other mechanical losses during impeller rotation are ignored.