Coupling speed regulation of three-phase asynchronous motor

A hydraulic coupling is a type of hydraulic transmission device, generally composed of a pump wheel and a turbine wheel, collectively referred to as a working wheel, placed in a sealed housing. A certain amount of working fluid is filled into the shell. When the pump wheel rotates under the drive of the prime mover, the liquid inside it is pushed by the blades and rotates. Under the action of centrifugal force, it enters the turbine along the outer ring of the pump wheel and gives thrust to the turbine blades in the same direction, driving the production machinery to operate. The power transmission capacity of the hydraulic coupler is consistent with the relative liquid filling amount inside the shell. During the working process, changing the filling rate can change the turbine speed of the coupler, achieving stepless speed regulation. Its characteristics are:
1. The power adaptability range is large, which can meet the needs of different powers ranging from tens of kilowatts to thousands of kilowatts;
2. Simple structure, reliable operation, convenient use and maintenance, and low cost;
3. Small in size, capable of accommodating large;
4. Convenient control and adjustment, easy to achieve automatic control.
This method is applicable to the speed regulation of fans and water pumps.