Shock damper DC

fluidhydraulicfor conveyor

Product overview
With the DC-Type (double-acting shock absorber), LEBEN offers a highly space-saving hydraulic industrial shock absorber suitable for a wide range of applications. The DC-Type is a double-acting COMPENSER® shock-reduction element that can be actuated alternately from both sides and corresponds in design and function to the C‑Type. The modular design allows on-site maintenance and simple repairs by customer personnel. Optional equipment examples: PU elastic impact-cap inserts for noise minimization and electronic extension monitoring (inductive or magnetic sensors). An additional accumulator can be fitted to increase gas accumulator volume and reduce retracting force in the retracted state.

Applications

• Miniload systems, intralogistics and warehouse technology
• Stacker cranes and AS/RS (automated storage and retrieval systems)
• Space-saving end stop for high-rise storage facilities, small-parts warehouses and shuttle systems
• Double-acting buffer for trolleys, stackers and conveyor technology
• Shock reduction for conveyors, transfer cars and horizontal movements
• Hydraulic shock absorber for air cargo/air freight warehouses and automated warehouses
• End position damping for automation, material flow and custom machine design

Design & Function
The piston rod enters the metering tube; the damping medium flows from the working chamber through the throttle bores of the metering tube into the compensation chamber. The nitrogen gas between the outer tube and the metering tube is compressed and stores the energy required for retraction. During retraction, the damping medium flows back into the working chamber. The DC design enables low retracting force allowing creep-mode approach operations.

Designations
1 Impact cap
2 Piston rod
3 Metering tube
4 Throttle bores
5 Volume compensation chamber
6 Working chamber
7 Outer tube
8 Rear flange

Options / Accessories

• Additional accumulator to reduce retracting force and separate damping-medium phase from nitrogen gas phase
• Sensors for signalling operational readiness (inductive, magnetic, optionally explosion-protected per ATEX)
• Integrated monitoring of fill levels
• Maintenance connection for filling damping medium and nitrogen gas
• Special materials (e.g., stainless steel) for corrosive environments or food industry use
• High-quality corrosion protection per DIN EN ISO 12944 up to C5M
• Bellows for optimal protection against dust, dirt or corrosive media
• Maintenance-free mechanical retraction via compression spring (optional)
• Valves to minimise retraction time or compression force during operational load cycles
• Round or square flange on front or rear side; foot mounting (welded or flanged)
• Special mounting elements according to customer geometry
• PU impact cap for noise reduction; special impact caps for catching or colliding caps
• Safety wire rope on the piston rod
• Special seals for extreme temperature ranges

Caractéristiques / spécifications techniques

• Mounting position: horizontal
• Low retracting force; optionally further reduced by additional accumulator
• Space-saving double-acting shock-reduction element (actuable from both sides)
• High buckling resistance
• Surface: housing zinc-plated (standard) or painted; piston rod hard chrome-plated (standard)
• Damping medium: low-viscosity COMPENSOL®
• Foot mounting or flange mounting
• Optional reaction behaviour: constant reaction over entire stroke or increasing reaction in front stroke range
• Very short activation time after impact
• Temperature range: -40 to +80 °C
• Energy conversion: up to 240 kNm
• Modular design enabling on-site maintenance and simple repairs