Description
RIMA Brakes
Self Blocking Rail Clamps
Overview:
These rail clamps are storm brakes suitable for high forces: from100 to 2000 kN.
The self-blocking rail clamp even in working position starts really to work, pressing the rail sides, only if the wind force overcomes the gantry brakes capacity. When this happens and the crane tends to move, the rail clamps pressing on the rail sides with a force proportional to the wind force deducted the gantry brakes force..
The capacity values indicated in the catalogue are calculated with friction coeff. of 0,25 or 0,45 between breaking shoes and rail, since the real coeff. is much higher (approx. 0,59 – certified by TUV German register), the rail clamps have High safety factor.
Main advantages:
Light Maintenance
Breaking shoes are practically for the whole life, thanks to the self-blocking working principle (working only when wind force overcomes the gantry brakes capacity, with a force proportional to the wind force deducted the gantry brakes force). Jaws duration is very long (our experience is that jaws last is not less than 10 years, in some cases they have been changed after 25 years of life) minimising maintenance needs. Particular suitability to high speed cranes thanks to the free movement: the wide gap (seldom contacts) between guides and rails allows a long duration of guides.
Efficiency
The holding force does not decrease in the years, thanks to the self-blocking working principle. The wear of shoes is negligible and in any case does not affect on the holding force. Independence of the holding force from the fatigue deriving from heavy duty cycle (the absence of springs renders this device suitable to the continuous open/close applications). Fast opening with law power: opening is made just rising up the light weight of the calliper (not working against strong springs and wasting energy).
High tolerance:
The automatic system allows very big variation of rail width (on request, up to 8 mm). Vertical allowance of the position respect the rail of ± 12 mm is big enough to permit a fixed installation also in the middle of the seal beam (no wheels are needed).
Easy installation:
Any type of installation is possible, without need of “on trolley” realisation that requires further maintenance.
Rail preservation:
End user will take advantage from the negligible effects of wear, due to the automatic blocking working principle
Options:
Customised realisations are available like integration of stowage pins in the clamp case frame, top flange, etc.
Electric board are available
Spring Rail Clamps
Main features:
These rail clamps are storm brakes suitable for small to medium forces: from 50 to 500 kN.
They are spring actuated; the spring exercises the closing force while an hydraulic cylinder fed by a suitable hydraulic unit provides the opening.
The value of forces indicated are calculated with friction coeff. of 0,25 or 0,5.
As the real coeff. is much higher (approx. 0,59 certified by TUV) the rail clamps have good safety factor.
Options:
. Integrated hydraulic unit
. Customized executions are available
RIMA Rail Brakes
Holding forces:
from 20 to 420 kN (friction coeff. = 0,5 )
Main features:
Stroke: two different Executions are available: short stroke and long stroke ( to cover bigger float)
Rail: two different executions are available for flat upper surface rails and curved upper surface rails
Small space required for installation
Possibility to work on embedded rails
Options:
• A pantograph execution is available for particular big vertical float with constant force
• Integrated emergency manual opening device
• Customised solution for installation on small wheel base boogies
• Possibility of dynamic braking
RIMA Wheel brakes
Main features:
These brakes are devoted to parking utilization, securing the crane, in stowed condition, against the wind force, therefore, in their normal
utilization they have to be closed when the crane is completely stopped.
In emergency condition they can be operated also as dynamic brakes to stop the crane. The braking shoes, pressing on the two sides of
a wheel, are actuated by springs and released by hydraulic power.
Rima wheel brakes are conceived for heavy duty applications where a high number opening cycles per day is requested.
