7 www.jbj.co.uk/couplings.html #DriveLineHarmony Introduction ® Fludex Fluid Couplings 153 2/3 12 101 102 103 105 106 120 153 163 101 12 2/3 103 102 105 106 163 120 FAD FAR Compensating chamber Working chamber Part 2/3 of the flexible coupling Flexible elements Blade wheel (outer wheel) Cover Fusible safety plug Blade wheel (inner wheel) Hollow shaft V-belt pulley Filler plug Screw plug (oil drain) G_MD10_EN_00116 FLUDEX FA series couplings are basic couplings (without delay chamber) which are driven via the hollow shaft (106) with attached blade wheel (105). This enables the advantages of the compensating chamber and the working chamber to be used to best effect. Combinations with brake drums/disks and pulleys can also be easily achieved. When the coupling is started, part of the oil filling in the area of greatest slip is forced into the radially inner chambers and the compensating chamber by the strong rotational flow. This causes the effective oil filling in the working chamber to be reduced and the desired torque limitation (approx. twice TN) to be achieved during starting. By means of additional fittings the coupling torque at the start of the starting operation can be limited to approx.1.5 times the rated value. During run-up to speed the compensating chamber again empties into the working chamber, and this helps to reduce slip. FGand FV series – drive via the housing When the coupling is started up, part of the oil filling is forced into the damming chamber. This enables the desired torque limitation (approx. twice TN) to be achieved during motor starting. In the FV series the delay chamber also receives part of the oil filling in accordance with the fluid level when the coupling is stationary. During starting the effective oil filling in the working chamber is reduced by the amount of fluid in the delay chamber, thus considerably From the delay chamber located on the drive side, the oil is fed back time-dependently to the working chamber via small holes and the coupling torque is raised, even if the output is blocked. FLUDEX FG and FV series couplings are designed for drive via the coupling housing. In the FV series (coupling with delay chamber), the motor drives the coupling housing, comprising a blade wheel (101) and a cover (102), via the flexible N-EUPEX coupling (part 2/3) and the delay chamber (115). The rotational flow of the coupling filling drives the blade wheel (105) and the hollow shaft (106) on the output side, which is mounted on the gear unit or drivenmachine shaft. In the FG series (basic coupling), there is no delay chamber, and the flexible coupling is directly flange-mounted on the blade wheel. FG series couplings are used for normal starting torque limitation, as a starting clutch for isolating vibration and for overload limitation in the event of drive blockage. reducing the starting torque (approx. 1.5 times TN). The property of the coupling with delay chamber can be used advantageously, for example, to soft-start empty, partly loaded and fully loaded conveyor belts. This replenishing function enables a drive to be soft started with a very low starting torque and with an almost load-free motor. At the same time, however, increased load torques can be overcome by the torque increase in the coupling. FA series – drive via the hollow shaft (impeller drive) 2/3 2/3 12 103 102 105 101 153 12 163 106 115 173 FGD FVD 2/3 12 101 102 103 105 106 115 153 163 173 Damming chamber Working chamber Part 2/3 of the flexible coupling Flexible elements Blade wheel (outer wheel) Cover Fusible safety plug Blade wheel (inner wheel) Hollow shaft Delay chamber Filler plug Screw plug (oil drain) Oil drain plug - delay chamber G_MD10_EN_00117
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