Torsionally Stiff Clutches PNEUMASTAR
The PNEUMASTAR clutch is a torsionally stiff double-cone friction clutch. The clutching components consist of two inner and two outer friction cones of which the inner ones are pneumatically pressed against the outer tapered friction faces via a clutching cylinder. Rubber sleeve springs form the torsionally stiff portion of the clutch. As the clutching components are moved over the rubber sleeve springs during the actuation of the clutch, a wear-causing axial sliding movement between the various contacting parts is avoided.
Pneumatic operation of the clutch enables speedy and precise manoeuvring, which is a prerequisite to qualify the clutch for use in the marine application. For example, a twin-engine installation can be manoeuvred with a counter-rotating propeller, without the need to reverse the engines continually. This is achieved by having engines running in opposite rotation to each other and connected via the manoeuvring clutch onto a twin-input/single-output reduction gearbox. Selective engagement/disengagement of the clutches will provide the manoeuvring facility.
Pneumastar - Technical Data
from | to | ||
---|---|---|---|
Nominal torque T kN |
kNm | 5.56 | 1,390 |
dyn. torsional stiffness C T dym |
kNm/rad | 906 | 263,656 |
max. speed n max |
min -1 | 520 | 2,900 |
Diameter D |
mm | 525 | 2,540 |
Weight m total |
kg | 155 | 18,955 |