KL-Type / Compact Hydraulic Absorber
Industrial Compact Hydraulic Absorber with Mechanical Spring Return / COMPENSER®
LEBEN offers the KL-Type, a hydraulic industrial shock absorber with spring return for applications in light machinery.
Compact Hydraulic Damper
The COMPENSER® KL-Type from LEBEN is a compact hydraulic industrial shock absorber with mechanical spring return, developed for applications in light machinery, material handling equipment and automation systems. Its particularly short and robust design makes the KL-Type suitable wherever only limited installation space is available but impact energy must still be absorbed safely and in a controlled manner.
Typical applications include handling equipment, small stacker cranes, AS/RS systems, lifting equipment, lift tables, vertical axes, conveyor technology and small crane systems. The KL-Type can be used both as an operational end-position damper and as an emergency shock absorber in the event of drive failure, brake malfunction or uncontrolled movement.
Low Return Force for Slow-Moving Machinery
A mechanical return spring automatically moves the piston rod back to its initial position after an impact. Compared with designs requiring a high restoring force, the KL-Type provides a low retracting force, making it especially suitable for machines that approach the end position slowly or at creep speed.
During impact, the piston rod moves into the pressure chamber and forces the hydraulic damping medium through precisely defined control grooves. The resulting flow resistance converts the kinetic energy of the moving mass into heat and generates a controlled deceleration.
Depending on the application, the shock absorber can be designed to provide an approximately constant reaction force over the damping stroke or an increasing reaction force in a defined stroke range.
Compact Safety Damper for Vertical Applications
The KL-Type is particularly well suited for vertical end stops and fall-protection applications. Typical examples include pallet trucks, lifting units, storage and retrieval machines, lowering stations and load-handling attachments. In the event of an uncontrolled downward movement, the hydraulic shock absorber can reduce impact forces and help protect frames, guides, drives and other machine components.
With its short overall length, high buckling resistance and energy absorption of up to 20 kJ (20 kNm), the KL-Type provides a compact solution for industrial applications with restricted installation space.
Different mounting options, corrosion-protection systems, special materials and application-specific impact caps allow the COMPENSER® KL-Type industrial shock absorber to be adapted to the requirements of the individual machine or system.
The COMPENSER® of the KL series is an industrial shock absorber for light mechanical engineering, e.g., handling equipment, small stacker cranes, and small crane systems. Due to the lower retracting force of the spring, this hydraulic industrial shock absorber of the KL series is well suited for operational creep speed approach.
Applications:
- Pallet truck fall protection during uncontrolled lowering
- Emergency end stop for linear axes in case of drive failure or brake malfunction
- Safety dampers for lift tables, lifting units, and lifting devices
- Shock absorbers for stacker cranes and hoist end positions
- Fall protection for load handling attachments in warehousing and conveying technology
- Protection of frames, guides, and lifting mechanisms from hard impacts
- Vertical end stop for lifts and lowering stations
- Emergency overrun/impact buffer for vertical axes with limited installation space
- preferred mounting position: vertical, other mounting positions on request
- low retracting force
- very short design
- high buckling resistance
- Surface: housing zinc-plated (standard) or painted, piston rod hard chrome-plated (standard)
- low-viscosity COMPENSOL®
- Mounting: flange mounting optionally on front or rear side, foot mounting or fastening via lock nut
- optionally constant reaction force over the entire stroke or increasing reaction force in the front stroke range
- very short activation time after impact
- Temperature range -30 to +60° C
- Energy dissipation up to 20 kNm
The piston rod 2 moves with the piston 6 into the pressure chamber 7. The damping medium flows through the control grooves in the outer tube 8 over the piston 6 into the volume compensation chamber 5. The return spring 3 is tensioned and, after impact, pushes the piston rod 2 back into the initial position, with the damping medium flowing back into the pressure chamber 7.
Designations
1 Impact cap
2 Piston rod
3 Return spring
4 Guide
5 Volume compensation chamber
6 Piston
7 Pressure chamber
8 Outer tube with control grooves
9 Tube closure
- specific materials, e.g., stainless steel for highly corrosive environments or use in the food industry
- high-quality corrosion protection according to DIN EN ISO 12944 up to corrosivity category C5M
- Special mounting elements (e.g. threads) according to customer’s desired geometry
- Special impact cap on customer request and for special applications