Variable speed fluid coupling / Scoop coupling provides step less speed variation in a wide range when connected to fixed speed electric motor. The speed variation in variable speed fluid coupling / scoop coupling is obtained by varying the oil filling in coupling through a sliding scoop tube when in operation.
Important Parts Of Variable Speed Fluid Coupling / Scoop Coupling
Assembly of Variable Speed Fluid Coupling / Scoop Coupling
Oil Flow Circuit Diagram of Variable Speed Fluid Coupling Or Scoop Coupling
The sliding scoop tube in this types of coupling governs the oil level in the working circuits depending on scoop tube Position between 0% to 100%. By varying the oil level in the working circuit the torque transmission capacity of the coupling varies, thus changing the slip of the coupling and provides step less speed variation in a wide range.
In 0% position, the scoop tube is at FULL In position and does not allow oil level to build up in the coupling. At this position of scoop tube, there is maximum slip and minimum torque transmission.
In 100% position, the scoop tube is FULL OUT position at which maximum oil is in circuit. This gives maximum torque transmission at minimum slip.
For intermediate position of the scoop tube, intermediate value of slip and torque transmission is obtained.
The heat generated in the coupling is picked up by the circulating oil which is cooled by oil cooler/ heat exchanger provided in the oil circuit.
