Hydraulically released and spring operated multiple-disk brakes FDLB, LB

Hydraulically released spring loaded multiple-disk brakes see as holding- and operating brakes diverse application in the drive technology. Brakes are positively. The braking force is compression springs generated. The loosening effected hydraulically by airing of the piston. They are suited for both wet and dry operation. At pressure loss is a mechanical brake for locking emergency opening system provided. They are low maintenance and assembly of number of individual panels is the condition for a safety brake met. They have a high operating safety the lamellas steel / sintered bronze.

Applications:
Hydraulically released spring loaded multiple-disk brakes are in the stationary and mobile versatile range whether or not combined with hydraulic motors. The brakes can lie in oil circuit of the engine. When starting of the hydromotor, the lift brakes in oil pressing of 15 – 38 bar. Thereafter, the full system pressure applied to 320 bar. When using fire-resistant fluids and boi-oils please consult the manufacturer.

Types:
Type A: cover plate closed, with flange;
Type B: cover plate open, with flange;
Type C: cover plate closed, without flange;
Type D: cover plate open, without flange;
Type E: no cover plate, without flange;
Type I: inner body.

Categories: ,

Description

Technical characteristics:

Size range: from 6,3 to 2 500;

Torque dry:

Ts: from 75 to 44 800 Nm;

Tü: from 90 to 57 000 Nm.

Torque wet:

Ts: from 47 to 34 000 Nm;

Tü: from 70 to 43 300 Nm.

Min. release pressure: from 16 to 27 bar.

Installation and operating conditions:

All component parts must be axially fixed and fastened. A precise centering of the brake is to be guaranteed. If two shaft ends are accommodated inside the hub, the bearings of the drive have to be brought as close as possible to the brake.
The brakes are functionally subject to slight brake-in wear, whereby the full torque is also guaranteed. Due to the automatic compensation by the piston, a readjustment is not necessary. Fully worn-out disks can only be exchanged as a package. In the event of any leakages the complete actuating unit has to be exchanged or work up.
The standard brakes are intended for horizontal installation. A deviation of up to ± 15° is permissible. Other conditions require the manufacturers approval. The oil pipes should be as short as possible and without sharp bends or restrictions of diameter. The backflow system is to be laid out in such a way that no backpressure greater than 3 – 4 bar results. Also in the case of dry running, the connection of an overflow oil pipe is recommendable for safety reasons. Accessibility to the emergency release screws has to be assured. In released state, idle running torques exist (functionally).
These can amount up to 2 % of the nominal torque.

Cooling and lubrication:
types of lubrication:
-flow through;
-splash lubrication – maximum submersion up to friction diameter (1/10 of the disk outside diameter);
-oil spray.
Following requirements are to be observed regarding the lubricants:
-high heat resistance and aging stability;
-low tendency to settle;
-good heat conducting and cooling characteristics;
-compatibility with steel and neutral behaviour with copper (max. degree of corrosion 2 per DIN 51759);
-low alloying ingredients.

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