TVA Fluid Coupling

When the coupling torque exceeds the rated torque of the motor and the working machine, it will lose the overload protection function. This is because the hydraulic coupler is increasing sliding one coupling heat, fusible plug spray to implement overload protection. If the coupling charging too much, will make the transmission torque capacity is too strong, after work overload, do not overload due to coupling, coupling the output torque is equal to the input torque, so the torque overload to the motor, the motor overload, overload protection function coupling loss.

In addition, if the coupler is fully filled with oil, the oil in the working cavity will not flow to the auxiliary cavity because the auxiliary cavity is filled with oil during the overload. Therefore, the torque of the coupler can not be reduced and the overload protection function is lost.

The torque limited hydraulic coupler is too small to be filled with enough power to make the working machine work under rated conditions. In order to increase the torque to adapt to the needs of the working machine, it is necessary to increase slip, reduce speed, work under the rated working condition. Because of the limited torque hydraulic coupling, that is, the efficiency is equal to the speed ratio, so the slip is increased, the speed ratio is reduced, and the efficiency is reduced. To reduce the power loss of efficiency after coupling into heat increased, the coupling temperature, when the temperature reached the protection of the fusible plug, then fusible plug spray protection, causing frequent spray coupling.

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