Tiêu đề 1.7 Accumulator , Intensifier and Hydraulic ram.pdf ✅

Hydraulic Accumulator Construction and Working The inlet of the cylinder is connected to the pump, which continuously supplies water under pressure to the cylinder and the outlet of the cylinder is connected to the machine (which may be lift or crane etc.) As the ram is at the lowermost position in the beginning; when the pump supplies water under pressure continuously and if the water under pressure is not required by the machine (lift or crane), then it will be stored in the cylinder; this will raise the ram on which a heavy weight is place. When the ram is at the uppermost position, the cylinder is full of water and accumulator has stored the maximum amount of pressure energy. When the machine (lift or crane) requires a large amount of energy, the hydraulic accumulator will supply this energy and ram will move in the downward direction
Capacity of Hydraulic Accumulator It is defined as the maximum amount of hydraulic energy stored in the accumulator.” The expression for the capacity of accumulator is obtained as: Let’s take, A= Area of the sliding ram L =Stroke or lift of the ram p =Intensity of water pressure supplied by the pump, W =Weight placed on the ram (including the weight of ram) = Intensity of pressure x Area of ram= p x A The work done in lifting the ram = W x lift of a ram = W x l = p x A X l Work done in lifting the ram is also the energy stored in the accumulator and energy stored is equal to the capacity of the accumulator. Capacity of accumulator = work done in lifting the ram = p x A x l = p x V