The Spiral Groove as Damping Principle…

In contrast to the customary industrial impact damper the exhausting channel (throttle) is directly incorporated in the piston. By its continuous spiral groove there is a dynamic force over the total stroke and a maximum energy absorption at minimum power. A lubricating film in the form of a hydrostatic slide bearing is built up between the piston and high-pressure tube. The technological improvement is evident.

…and its advantages:

• Smooth deceleration without cross section constrictions.

• Higher power absorption through use of maximum capacity in each piston position.

• Small construction space by substantial higher energy absorption.

• Minimum consumption rates by optimal bearing.

• Insertion in pneumatic pressure chamber possible.

• Higher operation safety and increased operating life.

Characteristics:

Customary Design

An industrial impact damper of conventional design squeezes the oil out by the throttle bores which are inserted on one side of a tube. The oil is force-diverted and enormous strain is generated by the high velocities of impact. The vibrations produced drastically effect the life of the elements involved in the damping process.

New and Improved Design

Zimmer GmbH incorporated the exhausting channel directly in the piston as a spiral grove. During the damping process mechanical strain of the oil remains low because of the rotary spiral groove. The result is maximum energy absorption over the entire damping stroke and guarantees a smooth damping process.

Hydrostatic Piston Guidance by Spiral Groove Technology

The piston of the PowerStop driving into the oil bath, produces during the damping process, a hydrostatic slide bearing between the piston and tube by the symmetric axis of the integrated spiral groove. The sliding film separates the movable elements during the damping process. The result is high life expectancy, maintenance-free operation and the guarantee of a high production safety.