Diaphragm hydraulic accumulator F9.601 series

Hydraulic accumulators are used in hydraulic power workholding applications as energy storage for compensation of internal leakages or to compensate the volume in the case of temperature changes. Energy storage With intermittent cycles the rating of the pump and thereby energy can be saved. During the breaks the pump refills the hydraulic accumulator. If required, a higher flow rate is available for a short time. Compensation for internal leakage In power workholding most of the pressure generators work in a cycling mode controlled by a pressure switch. If hydraulic devices with internal leakages are connected, e.g. spool valves or rotary valve couplings, this leads to frequent switching on and off of the electrical drive motor. The use of a small hydraulic accumulator considerably reduces the number of switching cycles and saves the material as well as energy. Volume compensation in case of temperature changes If hydraulic clamping systems will be separated from the pressure generator, there are considerable changes of the clamping pressure in the case of temperature variations (reference value ±10 bar at ±1°C). A small hydraulic accumulator mounted at a protected place on the fixture, causes a volume compensation and reduces pressure variations. In addition a small leakage will not immediately result in a pressure drop. A pressure gauge for pressure control should be installed in any case.