Coupling of 7 Limitations

Hydraulic coupling occurs earliest , belonging to loss of power -controlled speed . But as technology advances , hydraulic coupling gradually the following limitations:1, due to fluid coupling power transfer with hydraulic oil , so the speed control is unstable , low power factor , speed accuracy is poor.
2, due to coupling of the two ends of the axle shaft , neck to beat big oil spill equipment will result in a . This will certainly lead to mechanical shafts and bearings dry grinding . Thus , the failure rate is high.
3, when the fluid coupling failure, the device can only stop running. Seriously affecting production4, the fluid coupling is a mechanical speed control device. The principle of hydraulic Hydraulic tube fittings  coupling determines the rate of loss of 8-10 % . Meanwhile power loss into heat, so that the hydraulic oil temperature is too high. Cooling water requires a large amount of hydraulic oil.
5, the hydraulic coupling low overall efficiency , the governor 's own loss, maintenance of large , secondary cost prohibitive.6 , in the actual operation at temperatures higher than 95 ℃ or more, so that the water cooler easily plug fouling , resulting in failure .7, the hydraulic coupling is the mechanical axis of the motor output of the mechanical and hydraulic coupling shaft ; speed change by the fluid through the fluid coupling coupled to the mechanical output of the fan shaft. Far away from the fan and motor efficiency is poor. A large installation space required , based on complex