Description   Hydraulic accumulators use an incompressible fluid and a compressed gas, spring or raised mass to     Store energy Absorb shock Eliminate noise Counter-balance loads Types   Compressed Gas Accululators use a gas such as nitrogen usually include separate fluid and gas compartments. The fluid section connects to the hydraulic circuit so that as pressure rises, fluid enters the accumulator and the gas is compressed. As pressure falls, the...
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Q & A on Hydraulic Accumulators

We asked our users for their input on Hydraulic Accumulators. Here are the results of 64 users familiar with Hydraulic Accumulators.

Who Took Our Poll? | Design Trends | Applications and Use | Features | Buying Advice

Who Took Our Poll?Top

Design TrendsTop

Q:
What new technologies are influencing hydraulic accumulator design?
9 answers
Answers:
Bladder Material for extreme temperatures and fluid compatibility. Increased use as energy storage devices to improve fuel economy.
~George S, Retired Fluid Power Sales, Edmond, OK
The material of bladder, protection of bladder from damage, accumulator charging kit's quality and oil connection type.
~Engineering, Consulting, Thane, India
Self containment by electronic retraction.
~Ken M, Research & Development, Amboy, WA
Change of speed in operating systems due to closer tolerances on pumps and cylinders.
~Francis S, Project Manager, Rothesay, Canada
Material selection is key when dealing with hazardous media.
~Tim W., Design Engineer, Anchorage, U.S.
Envelope size, location of installation on equipment.
~Purchaser, Duluth, GA
Alternative energy vehicles.
~Carl D, Faculty/Staff, Sylvan Lake, Canada
Hydraulic in-line elements.
~TAO ZF, Research & Development, BEIJING, P, R of CHINA
Aurospace, ag.
~Bus. owner, Santa Rosa, CA

Q:
From your perspective, which companies are creating the most innovative hydraulic accumulators?
9 answers
Answers:
EPE, Parker , Bosch
~Engineering, Consulting, Thane, India
Oil air hydraulics is what I used, but they all seemed to be comparable.
~Tim W., Design Engineer, Anchorage, U.S.
Hydac, Bosch
~George S, Retired Fluid Power Sales, Edmond, OK
Parker, Hydac
~Purchaser, Duluth, GA
Vickers
~Francis S, Project Manager, Rothesay, Canada
Hydac
~Carl D, Faculty/Staff, Sylvan Lake, Canada
Old technology is all there is.
~Engineering, Design, Moses Lake, WA
Hydac
~Port Kembla, Australia
PALL
~TAO ZF, Research & Development, BEIJING, P, R of CHINA

Applications and UseTop

Q:
What are some of the applications you have used hydraulic accumulators for?
16 answers
Answers:
I have designed and sized accumulators to reduce hydraulic shock in a bulk fuel facility. Prior to my examination it was determined that a shock wave had caused catastrophic pump failure to several pumps.
~Tim W., Design Engineer, Anchorage, U.S.
As shock system for pistons wood handling equipment. As shock absorbers for super calendar hydraulics. As source of hydraulics power (saftey) for loss of system power.
~Francis S, Project Manager, Rothesay, Canada
Stone protection on agricultural implements, weight reduction on foldable stairs and automatic door opener.
~Ove, Technical Support, Herning, Denmark
High pressure fluid pumps, hydraulic system where accumulators are used for boost function, load carrying equipment.
~Engineering, Process/Production, Farstad, Norway
I work for ArcelorMittal and we use hydraulic accumulators at various plants and systems and as shock absorbers.
~Quality Control/Assurance, Vanderbijlpark, South Africa
Energy storage, cushioning, increased production, pulsation reduction, safety.
~George S, Retired Fluid Power Sales, Edmond, OK
Energy Storage, Noise Reduction, Counterbalance and Safety Back Up Systems.
~Ross S, Design Engineer, Melbourne, Australia
Weapons loading backup system..heavy equipment hydraulic system backup.
~Ken M, Research & Development, Amboy, WA
For reducing the power required to run high volume pumps.
~Engineering, Consulting, Thane, India
Emerg storage, system pulsation on Industrial Hydraulics.
~Port Kembla, Australia
Shock absorbing, energy storage/ recovery
~Marketing/Sales, WAUSAU, WI
seismic sources: vibroseis
~TAO ZF, Research & Development, BEIJING, P, R of CHINA
Automotive Industry, Ag.
~Bus. owner, Santa Rosa, CA
Tensioner Assemblies,
~Purchaser, Duluth, GA
Shock, flow
~Carl D, Faculty/Staff, Sylvan Lake, Canada
Pressure
~Engineering, Design, Moses Lake, WA

Q:
Please share with us any “non-standard” applications that hydraulic accumulators have been used for.
4 answers
Answers:
Transmission pump servo assist.
~Ross S, Design Engineer, Melbourne, Australia
Row tractors in grape agro.
~Bus. owner, Santa Rosa, CA
Ramps
~Ken M, Research & Development, Amboy, WA
0.6L Balde used as a in-line accumulator w/o case.
~TAO ZF, Research & Development, BEIJING, P, R of CHINA

Q:
Do you know of any disastrous mistakes that occurred due to the incorrect usage of hydraulic accumulators?
4 answers
Answers:
Complete exhaustion at too high flow rates leading to bladder failures.
~Ross S, Design Engineer, Melbourne, Australia
Failure of not enough capacity to complete the process.
~Bus. owner, Santa Rosa, CA
Forgetting safety can lead to disaster.
~George S, Retired Fluid Power Sales, Edmond, OK
Charged with oxygen!
~TAO ZF, Research & Development, BEIJING, P, R of CHINA

FeaturesTop

Q:
What would your design or feature "wish list" be for this product?
8 answers
Answers:
Improved fluid compatibility. Extremely durable/strong Elastic material for shell to eliminate need for gas.
~George S, Retired Fluid Power Sales, Edmond, OK
Robust indicator instruments for current level and pressures. Wet (liquid) detector for gas side.
~Carl D, Faculty/Staff, Sylvan Lake, Canada
Better information on material limitations. What applications they operate in and service life.
~Tim W., Design Engineer, Anchorage, U.S.
Shippable by air to European countries.
~Engineering, Design, Moses Lake, WA
Long Life, lower maintenance cost.
~Port Kembla, Australia
Better quality transfer of fluids.
~Bus. owner, Santa Rosa, CA
Better rubber strength and life..
~Ross S, Design Engineer, Melbourne, Australia
PALL, OLEAR
~TAO ZF, Research & Development, BEIJING, P, R of CHINA

Q:
Is there any advice you want to share with users to help them avoid common errors in selection or usage of hydraulic accumulators?
6 answers
Answers:
Don't listen to the salesman that tries to sell you an accumulator with a pressure specification much higher than your actual requirements.
~Ross S, Design Engineer, Melbourne, Australia
Design for safety with lock-out tag-out procedures and fail safe devices to prevent accidental unloading.
~George S, Retired Fluid Power Sales, Edmond, OK
Check design several times and do not assume.
~Francis S, Project Manager, Rothesay, Canada
Use caution not to oversize..
~Tim W., Design Engineer, Anchorage, U.S.
Question sales reps.
~Bus. owner, Santa Rosa, CA
LP accumulator is easily damaged being pressure surging
~TAO ZF, Research & Development, BEIJING, P, R of CHINA

Buying AdviceTop

Q:
Do you have any advice for people relative to buying or using hydraulic accumulators?
8 answers
Answers:
Design the accumulator around your design, not the design around the accumulator. There are enough manufacturers to build specific to what you need.
~George S, Retired Fluid Power Sales, Edmond, OK
Understand the complete hydraulic system requirements (fit, form and function) before choosing a specific type of accumulator (piston, bladder).
~Purchaser, Duluth, GA
Find out if bladder materials are well suited for your operating and non-operating temperature extremes.
~Carl D, Faculty/Staff, Sylvan Lake, Canada
Study system very well for end use.
~Francis S, Project Manager, Rothesay, Canada
Become knowledgeable of what's out there.
~Bus. owner, Santa Rosa, CA
Used as ripple eliminate or flow supply will be critical for whom to buy accumulators.
~TAO ZF, Research & Development, BEIJING, P, R of CHINA
Don't buy more than you need.
~Ross S, Design Engineer, Melbourne, Australia
Run your calcs carefully.
~Tim W., Design Engineer, Anchorage, U.S.


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