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DBB Tech Specs

DBB Tech Specs
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DBB Description Model DBB brakes are spring applied, pressure released, disc style brakes. They develop equal torque in either direction of rotation. Their torque and thermal capacities allow them to be used in the most demanding applications. Brake construction and operation is shown in the figure. Pressurizing the brake compresses the brake springs and withdraws the clamping plates from the brake discs. Standard brakes are furnished with either one or two discs, which are free to move axially. Model DBB uses a conventional piston design to release the brake discs. The rotating component of the DBB style brake is a very low inertia friction disc core with riveted on friction discs. The low inertia of the rotating components coupled with the high heat sink capacity of the stationary members allow these units to provide superior performance in high cyclic applications. In applications requiring higher speed operation or where precise balance of the rotating components is required, the DBBS style is offered, which utilizes a solid rotor and stationary friction material. Similar to the DBAS design, the DBBS should only be used for applications where brake engagement is non-cyclic. Torque ratings listed are for brakes with a standard compliment of springs. The quantity of springs can be varied to customize the torque of the brake to suit a particular application. Consult the factory for brake torque of units with non-standard spring configurations. Brake sizes are indicated by the number of brake discs and the disc diameter in inches. For instance, size 225DBB has two discs 25 inches in diameter. Features Low inertia friction disc assembly. Reduces the overall inertia that must be stopped. Optional split friction discs. Allows removal of friction discs without disturbing other components of drive system in mid-shaft brake arrangement. Long wearing, self lubricating PolyPak* seals. Eliminates premature twisting failure and requires no external lubrication. Where used: • • Power Shovels • Conveyors • Shears • E-5 Bottling equipment Power Presses Copyright Eaton Corporation, 1997, All rights reserved.

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DBB Component Parts 9 4 22 5 18 14 1 15 6, 7 10 13 23, 24 17 27 19 29 16 30 25 35 2 28, 32, 33 26 20 8 3 11 12 34 21 Dual disc element shown Item Number Description Item Number 31 Description Item Number Description 1 Mounting Flange 13 Cylinder 25 Ring Gear 2 Stud 14 Hex Head Screw 26 Pipe Nipple 3 Friction Disc Sub-Assembly 15 Outer Seal 27 Elbow 4 Friction Disc 16 Spring 28 Pipe Cross 5 Friction Disc Core 17 Inner Seal 29 Hose Assembly 6 Rivet 18 Spacer Tube 30 Pipe Nipple 7 Washer 19 Gear 31 Flow Control Valve 8 Clamp Tube 20 Wear Spacer 32 45 Deg. Street Elbow 9 Pressure Plate 21...

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