peter kloft and daniel rau - converia · 2018. 4. 3. · peter kloft and daniel rau the 11th...

© HYDAC International GmbH behält sich alle Schutzrechte vor. Alle Rechte zur Nutzung und Weitergabe liegen ausschließlich bei HYDAC International GmbH / © All rights reserved HYDAC International GmbH. No unauthorized copy or distribution allowed

Speichertechnik / Accumulators

Edge welded metal bellows

Peter Kloft and Daniel Rau

The 11th International Fluid Power Conference, 11. IFK, March 19-21, 2018, Aachen, Germany



Edge welded metal bellowsOverview

• Hydro-pneumatic accumulators – different designs and applications

• Metal bellows accumulators

• Design and production of edge welded metal bellows

• An indicator showing the integrity of the metal bellows

• Edge welded metal bellows accumulators in extreme environments

• Testing of edge welded metal bellows accumulators

• Industrial applications



Edge welded metal bellowsTypes and Applications of Accumulators

engery storage

separation

volume compensationshock absorbtionpulsation damping



Edge welded metal bellowsPrinciple designs

Edge welded metal bellowsCorrugated metal bellows



Edge welded metal bellowsPrinciple designs

Metal bellows in elongated position

Metal bellows in block position

Welded seam

Single, round blanks welded in circumferencedirection inside and outside



Edge welded metal bellowsSpring rate



Edge welded metal bellowsAccumulator for a suction line



Edge welded metal bellowsIndicator

Not contaminated Indicator with “Nil Red”Contaminated with HyJetTM

Housing for Indicator



Edge welded metal bellowsEnvironmental tests - vibration




Fluid filled gap

Temperature increase by dissipation of the fluid in the gap

break




Gas sideUpper position Center positionLower position Fluid side

Nominal diameter - chargingupper

lower

Fluid side

Gas side

center




Gas sideUpper position Center positionLower position Fluid side

Increased diameter - chargingupper

lower

Fluid side

Gas side

center



Edge welded metal bellowsEnvironmental tests – fire test setup

Temperature sensor

Temperaturesensor

Temperaturesensor

Pressure sensor

clamp

clamp

burner

Vibration table

recorder

ISO 2685 1998Aircraft -- Environmental test procedure for airborne equipment -- Resistance to fire in designated fire zones



Edge welded metal bellowsEnvironmental tests – fire tests



Edge welded metal bellowsEnvironmental tests – fire tests

Flame from the front

Flame from the side

Glass after fire test



Edge welded metal bellowsHydraulic tests – test setup

Test setup for pressureclose to 0 bar absolutepressure

recorder



Edge welded metal bellowsEndurance test

precharge pressure

metal bellowson block position

AB

maximum pressure



Edge welded metal bellowsIndustrial applications



Edge welded metal bellows

Peter Kloft and Daniel Rau

The 11th International Fluid Power Conference, 11. IFK, March 19-21, 2018, Aachen, Germany

Thank you verymuch for yourattention!

Peter Kloft

HYDAC Technology GmbH

Head of Research & Development

+49 6897 5091657

[email protected]

peter kloft and daniel rau - converia · 2018. 4. 3. · peter kloft and daniel rau the 11th...

Documents