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A hydraulic accumulator is a pressure storage reservoir in which an incompressible hydraulic fluid is held under pressure that is applied by an external source of mechanical energy. The external source can be an engine, a spring , a raised weight , or a compressed gas .
Hydraulic circuits can perform a sequence of operations automatically, such as trip-and-reclose three times, then lockout, of an oil-interrupting recloser. [7] Shuttle valves provide a logical or function. Check valves are one-way valves, allowing an accumulator to charge and maintain its pressure after the machine is turned off, for example.
However, a charging pressure above P lo will not allow the pump to turn on when the water pressure is below P lo, so it is kept a bit below P lo. Another important parameter is the drawdown factor ( f Δ V ), which is the ratio of the drawdown to the total tank volume:
Pages in category "Hydraulic accumulators" The following 6 pages are in this category, out of 6 total. This list may not reflect recent changes. ...
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Diagram of recoil mechanism, British 60-pounder gun Mk.I, 1916. The idea of using a water brake to counteract the recoil of naval cannons was first suggested to the British Admiralty by Carl Wilhelm Siemens in early 1870s, but it took about a decade for other people (primarily Josiah Vavasseur) to commercialize the idea. [1]
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The coaster's power source is several hydraulic pumps, each capable of producing 500 horsepower (370 kW). These pumps push hydraulic fluid into several accumulators. These accumulators are divided into two compartments by a movable piston, one side filled with hydraulic fluid and the other with nitrogen gas. The nitrogen is held in large tanks ...