Do you understand the principles and functions of couplings?

Coupler principle

When the power machine drives the coupling to rotate, the liquid in the chamber of the coupling is stirred by the pump wheel first. Under the action of centrifugal force, the liquid in the chamber is accelerated from the inlet of the smaller radius runner and thrown to the inlet of the larger radius runner, so that the momentum of the liquid is increased. At the outlet of the pump wheel, the liquid flow rushes to the higher speed and pressure. Turbine blades release liquid kinetic energy to drive the turbine to rotate and do work. Turbines convert liquid kinetic energy into mechanical energy. When the kinetic energy of the liquid decreases, it flows out of the turbine and into the pump wheels under the impetus of the subsequent liquid, and then begins a new energy conversion. In this cycle, the input and output are successfully connected by liquid kinetic energy without direct mechanical connection.

Coupling function

It has a flexible transmission function: it can effectively reduce impact, isolate torsional vibration and improve transmission quality.

It has the function of starting motor with light load: when the motor starts, the torque is very small, close to no-load starting, thus reducing the starting current, shortening the starting time, and the starting process is smooth and smooth;

With overload protection function: effectively protect the motor and the working machine from damage when starting or overloading, reduce the failure rate of the machine, extend the service life of the parts and the whole machine, reduce maintenance costs and downtime;

It has the function of coordinating multi-motor synchronous starting: in the multi-motor starting system, it can achieve the sequential starting of the motor and coordinate the synchronous and stable driving of the motors.

purpose

Limited torque hydraulic coupling is widely used in mining, chemical, metallurgical, light industry, leather, construction, post and telecommunications, transportation, power, textile and other industries.

The pump wheel and turbine of the hydraulic coupler form an airtight working chamber which circulates the liquid. The pump wheel is mounted on the input shaft and the turbine is mounted on the output shaft. When the power plant (internal combustion engine, motor, etc.) drives the input shaft to rotate, the liquid is thrown away by centrifugal pump wheel. This high-speed liquid enters the turbine and pushes the turbine to rotate, transferring energy from the pump wheel to the output shaft. The liquid returns to the pump wheel to form a continuous flow. Hydraulic coupler transfers torque by the change of momentum moment produced by the interaction of liquid with pump wheel and turbine blade. 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 coupling between the input shaft and the output shaft of the hydraulic coupler depends on the liquid, and there is no rigid connection between the work components.

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Coupler fittings