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Hydraulic Shock Absorbers

201200-1-3

Shock Absorbers

The lifting capacity of an offshore crane can be increased significantly by using a crane shock absorber. Such a shock absorber works as a separate unit without external connections.

  • Using a crane shock absorber, may result in substantial savings in a lighter construction with far less steel than in traditional cranes.
  • A shock absorber uses basic accumulator technology, and functions as a spring.
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201200-1-5

Active / passive heave compensation

Active heave compensation
- Compensation used to maintain the load at a specific height in relation to a fixed point, from a crane that is moving with the swell of the sea.
- The compensation is operated with pumps, or using an accumulator for heavy loads, and can be connected with a hydraulic motor or a linear cylinder. A unit on board the ship, which shows the exact height of the ship, controls the system.
- Active compensation if often used in combination with passive compensation. The passive part counteracts the greatest forces, while the active part regulates small movements. This is done to avoid having to regulate too large amounts of oil.

Passive heave compensation:
- Usually ordinary damping used to ensure better lifting control.

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Soft Landing Dampers

Soft Landing Dampers are used when components are lowered down onto subsea installations. Such equipment has been designed to withstand a certain amount of G forces. To prevent the equipment from being damaged when landing, dampers are used to soften the impact. When constructing dampers, the following factors must be taken into consideration:
- Weight of components
- Lowering speed
- Tolerances of the components to be lowered
- Damping length

The dampers are designed so that the energy is absorbed as evenly as possible across the entire stroke of the damper. This is mainly achieved by throttling, so that the area of the nozzles become smaller as the speed decreases.

Datasheet, pricelist
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201200-1-1

Industrial Shock Absorbers

Industrial hydraulic shock absorbers. The program also includes bellows cylinders and specialty products in the following areas: industry, offshore, marine, electronics, aircraft and military purposes.

Datasheet, pricelist
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SERVI GROUP
Rasmus Solbergs vei 1
Postboks 3230
1400 Ski

T +47 64 97 97 97
F +47 64 97 98 99
post@servi.no

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TrondheimT +47 73 80 10 00
Servi Ulsteinvik AS
UlsteinvikT +47 70 31 85 50
ÅlesundT +47 96 91 96 01
 
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GøteborgT +46 (0)31 745 00 62

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