Overview of the functions and uses of bladder type accumulators(二)

  1. The functions of bladder type accumulators are mainly divided into four categories: energy storage, hydraulic shock absorption, pulsation elimination, and energy recovery:

Type 1: Energy storage. This type of function can be further subdivided into: ① as an auxiliary power source to reduce installed capacity; ② Compensate for leakage; ③ Compensate for thermal expansion; ④ As an emergency power source; ⑤ Construct a constant pressure oil source olaer bladder accumulator ehv .

Type 2: Absorb hydraulic impact. The sudden reversal of the directional valve and the sudden stop of the actuator movement can generate pressure shocks in the hydraulic system, causing a rapid increase in system pressure in a short period of time, resulting in damage to instruments, components, and sealing devices, as well as vibration and noise. To ensure the absorption effect, the accumulator should be installed near the impact point, so the accumulator is generally installed before the control valve or hydraulic cylinder and other impact sources, which can effectively absorb and buffer hydraulic impacts.

Category 3: Eliminating pulsation and reducing noise. For hydraulic systems that use plunger pumps with fewer plungers, periodic changes in pump flow can cause vibrations in the system. Installing an accumulator can absorb a large amount of energy from pulsating pressure and flow rate within one cycle of flow pulsation. The portion of oil with an instantaneous flow rate higher than the average flow rate is absorbed by the accumulator, while the portion with a flow rate lower than the average is replenished by the accumulator. This absorbs the energy in the pulsation, reduces pulsation, and reduces the risk of damage to sensitive instruments and equipment epe bladder accumulator pdf.

Category 4: Energy recovery. The use of energy storage devices to recover energy is currently a field of extensive research. Energy recovery can improve energy utilization efficiency and is an important way to save energy. Accumulators can be used to recover various functions and position potential energy because they can temporarily store energy. The main research in this area includes: ① recovering vehicle braking energy; ② The potential energy of the boom mechanism of recycling engineering machinery; ③ Recycling hydraulic excavator turntable braking energy; ④ Recovering the gravitational potential energy of the falling oil well repair machine and drilling rig pipes; ⑤ Retrieve the downward gravitational potential energy of the elevator epoll bladder accumulator .