Hydraulic accumulators are an essential component for optimal operation of a hydraulic circuit. In hydraulic circuits, the accumulator enables the following:
Applications:
- Energy storage: conserves energy without loss and redistributes as needed, reducing installed power.
- Pressure compensation: absorbs pressure spikes from pumps or other components to control pressures and flow rates in a hydraulic circuit.
- Volume control: absorbs variations in fluid volume caused by temperature changes in a closed hydraulic circuit and maintains a nominal pressure.
- Maintains fluid flow rate: an accumulator can maintain fluid flow in case of pump failure and can also be used as a mobile pressurized fluid reserve.
- Emergency energy storage: if the main energy source fails, an accumulator can provide enough energy to complete an operation or complete a full hydraulic cycle.
- Prevents mixing of liquids: transfer of energy from one fluid to another without risk of mixing.
- Shock absorber: Suppresses shock and vibration in hydraulic systems of lifting vehicles (e.g., forklifts).
Models:
EHV - series: accumulators for high pressure. Forged body without welding. Anti-extrusion valve on liquid side. Sturdy nitrogen loading valve. Fully removable battery for overhaul and replacement of damaged parts.
EBV - serie: low-pressure bladder accumulators. Forged body without welding. Liquid side window. Sturdy nitrogen loading valve. Fully removable battery for overhaul and replacement of damaged parts.
ELM - series: membrane accumulators with vulcanized metal anti-extrusion plate. welded steel housing. Hex screw for nitrogen charging. NON-repairable batteries. in case of damage they must be replaced.
EHP - series: Flange piston accumulators on gas side. Unwelded, drilled and ground tube. Aluminum piston. Nitrogen loading valve. Fully removable battery for overhaul and replacement of damaged parts.
BLADDER ACCUMULATOR DIAPHRAGM ACCUMULATORÂ Â Â Â Â Â Â Â Â Â Â Â PISTON ACCUMULATOR
Operation:
In 1938, Olaer invented and built the hydropneumatic pocket-type accumulators (licensed Mercier-Greer). From there until its entry into the large Parker family in 2013, it remained a leader in the construction and supply of accumulators. The sizing of pocket accumulators is based on Mariotte's law, which takes into account the important difference in compressibility between a gas and a liquid. Hydraulic accumulators are basically divided into three types. Pocket, diaphragm, piston accumulators. In bag and diaphragm accumulators, they are blocked in the body and inflated with nitrogen at a pressure determined depending on the work to be performed and the application. In piston accumulators, the separation of gas (nitrogen) and liquid is carried out by means of a floating piston.