Which accumulator is described as a fully enclosed cylinder with a hydraulic oil port at the bottom and a pneumatic charging port at the top, with direct contact between the media?

Which accumulator is described as a fully enclosed cylinder with a hydraulic oil port at the bottom and a pneumatic charging port at the top, with direct contact between the media?

• A. Direct contact-type
• B. Bladder-type
• C. Piston-type
• D. Diaphragm type

Answer: (A)

Direct contact-type accumulators store energy by having the hydraulic oil and the gas share the same reservoir, with no barrier between them. In this design, the cylinder is fully enclosed and features a bottom port for hydraulic oil and a top port for charging the gas pneumatically. The oil and gas are in direct contact at their interface, so the gas is compressed directly by the oil pressure. This is different from bladder-, diaphragm-, or piston-type accumulators, which include a barrier between the oil and gas to prevent contact.

Direct contact-type accumulators store energy by having the hydraulic oil and the gas share the same reservoir, with no barrier between them. In this design, the cylinder is fully enclosed and features a bottom port for hydraulic oil and a top port for charging the gas pneumatically. The oil and gas are in direct contact at their interface, so the gas is compressed directly by the oil pressure. This is different from bladder-, diaphragm-, or piston-type accumulators, which include a barrier between the oil and gas to prevent contact.