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Flexible couplings: elastic couplings

WESTCAR SRL

  • Flexible shaft coupling

ROTOFLUID-SCF

Article: 00052021

Flexible shaft coupling

The use of a fluid coupling with a delay fill chamber limits maximum torque during start-up, without prejudicing slipping in normal functioning.
This allows the motor to quickly increase speed [revs] without hitting the resistant torque (as if it started unloaded).
A Fluid coupling with a delay fill feature is fitted with additional chamber in order to reduce the quantity of oil in the working circuit (see Fig. 1).
The chamber is in contact with the circuit via calibrated nozzles, which can be set as required (see Fig. 2).
The variation in the calibrated nozzle holes changes the time it takes for the oil in the chamber to reach the working circuit, thereby, increasing or decreasing start-up time for the driven machine.
When all the oil has flowed from the chamber into the circuit, the fluid coupling reaches the rated speed, transmitting the required torque with minimum slippage (see Fig. 3).
Fluid couplings may be fitted with either a single or dual delay fill chamber.
With a single delay fill chamber, Ca/Cn torque limitation varies from 180% to 150%, adjusting the quantity of oil.
With a dual delay fill chamber Ca/Cn torque limitation varies from 150%. to 120%, adjusting the quantity of oil.
The advantages of delay fill chambers are enhanced as the power requirement rises.
SCF and DCF delay fill chambers are available from size 30 to size 95P.

Specifications

  • Type: flexible

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