© Siemens AG 2015 FLENDER Standard Couplings Fluid Couplings — FLUDEX Series General information Axial retention Axial retention is provided by a set screw or end washer with a retaining screw for shaft ends to DIN 748/1 long with a centering thread to DIN 332/2. Other methods must be specified in the order, using the article number with "-Z" and order code "Y99" with plain text specification, unless ordering options are avail- able. Bore and keyway width tolerances are specified in catalog section 15. Weights specified in the dimension order tables apply to maxi- mum bore diameters without oil filling.
■ Configuration Selection of FLUDEX coupling In accordance with the requirements catalog various series, sizes and types of FLUDEX coupling are available. The FLUDEX coupling series is characterized by various flow chamber config- urations, fitted delay chambers or fittings in the flow chamber. The types are determined by the design of the add-on coupling. This results in different starting factors and characteristics which can be used for the most varied applications. The size is speci- fied by stating the flow outside diameter. When selecting, the series required for the application, taking into account the starting factor and the characteristic, must be selected.
Selection of FLUDEX series FLUDEX couplings which are to be used without special condi- tions solely as an aid to starting the motor can be selected using the assignment tables on page 13/12 (for n = 1500 rpm) or page13/14 (for n = 3000 rpm). If special requirements, based on the operating method of the prime mover or driven machine, are made of the coupling or the coupling is to be used in extreme environmental conditions, please give specific details in the enquiry or order. The form “Technical specifications for the selection of type and size” can be used for this purpose.
Description of the FLUDEX series FA series – drive via the hollow shaft (impeller drive) 103 153 102 FAD 101 12 2/3 2/3 Part 2/3 of the flexible coupling Compensating chamber 105 12 Flexible elements 101 102 Blade wheel (outer wheel) Cover 106 G_MD10_EN_00116 103 105 Fusible safety plug Blade wheel (inner wheel) 106 Hollow shaft Working chamber 120 153 V-belt pulley Filler plug FAR 120 163 Screw plug (oil drain) 163 FLUDEX FA series couplings are basic couplings (without delay chamber) which are driven via the hollow shaft (106) with at- tached 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 radi- ally 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 limita- tion (approx. twice T N ) to be achieved during starting. By means of additional fittings the coupling torque at the start of the start- ing operation can be limited to approx. 1.5 times of the rated value. During run-up to speed the compensating chamber again empties into the working chamber, and this helps to reduce slip.
13 13/7 Siemens MD 10.1 · 2015