Power Jacks Rolaram Linear Actuators - Manual (Page 22)

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LINEAR ACTUATORS | Rolaram
9. Special Rolaram® Designs and Applications
Actuator
R150 model, roller screw version, in-line drive.
Application
Driving reciprocating, double acting paint pumps in the first all-electric
paint mix facility in Europe.
Linear Actuation Requirements
The dynamic load is 17.9 kN in both directions, at a linear speed of 3
metres/minute
and a continuous duty cycle of 24 hours/day, 365 days/year. Each pump
delivers 40 litres of paint/minute at 12 bar, 12 cycles/minute. The paint
shop output is 30 cars/hour
(Phase 1) and 60 cars/hour (Phase 2).
Solution
Each pump is driven by a special R150 Rolaram actuator and a total of
31 actuator and pump systems are installed.
The actuator’s features are:
•
In-line configuration, minimizing the installation footprint
• Completely sealed unit, ensuring no contamination of the pumped medium
• Intrinsically safe, eliminating explosion risk
• Fitted with a keyed screw mechanism
An electro mechanical solution was preferred to pneumatics/hydraulics due to significantly reduced running costs, high
life and reliability, high efficiency, low maintenance, low paint degradation and quiet operation.
Actuator
B100 model, ball screw version, parallel drive.
Application
Full body, multi purpose X ray examination table.
Linear Actuation Requirements
The dynamic load is 65 kN and high positional accuracy is required to achieve a defined
axial play of the ram. Due to the clinical environment, the ability to tilt and elevate at
the same time is unique and no other table on the marketplace is available with this
feature. Operating in a medical environment, a major requirement of the actuators is
low noise and the units cannot exceed 60 dB.
Solution
Two B100 ball screw Rolaram actuators, both parallel drive configurations, are fitted
on each X ray table and they are synchronized for horizontal and vertical positioning
through a complex servo control system. The actuators are tested to withstand 8 times
the maximum load, without catastrophic failure. Due to space constraints, they are of a
compact design and conform to strict aesthetic criteria.