Overview of the functions and uses of bladder type accumulators(1)

Bag type accumulators are indispensable and important components in hydraulic components, playing an important role in hydraulic components. To understand the functions and uses of bag type accumulators, the following is an overview of Zhongya High tech Hydraulic – Bag type Accumulator manufacturers for you:

There are two uses for bladder type accumulators.

① When the flow required by the load during low-speed movement is less than the flow rate of the hydraulic pump, the excess flow rate of the hydraulic pump is stored in the accumulator. When the flow rate required by the load is greater than the flow rate of the hydraulic pump, the liquid is discharged from the accumulator to compensate for the insufficient flow rate of the hydraulic pump.

② When the machine is shut down but still needs to maintain a certain pressure, the hydraulic pump can be stopped and the accumulator can compensate for the leakage of the system to maintain the pressure of the system.

Bag type accumulators can also be used to absorb the pressure pulsation of hydraulic pumps or the hydraulic impact pressure generated in the system. The pressure in an accumulator can be generated by compressed gas, heavy hammer, or spring, and the accumulator can be divided into gas type, heavy hammer type, and spring type accordingly. The direct contact between gas and liquid in gas accumulators is called contact type, which has a simple structure and large capacity, but gas is easily mixed in the liquid, and is commonly used in hydraulic presses. Gas and liquid that do not come into contact with each other is called an isolation type, which is commonly isolated by a skin bag and a diaphragm. The volume change of the skin bag is large, while the volume change of the diaphragm is small, and it is commonly used to absorb pressure pulsations. The heavy hammer type has a large capacity and is commonly used in systems such as rolling mills for energy storage.

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

The first type: storing energy. This type of function can be further divided into: ① as an auxiliary power source to reduce installed capacity; ② Compensating for leakage; ③ Compensate for thermal expansion; ④ As an emergency power source; ⑤ Constitute a constant pressure oil source.

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