Structure of air bag accumulator
Let's take the air bag accumulator as an example. Let's take a look at its internal structure first!
The structure is super simple. Inside the metal shell, there is an on-off valve, an inflation valve and an air bag. When enough high-pressure gas is filled into the air bag, the air bag will expand to the position where the on-off valve is closed, and the function of the on-off valve is to prevent the air bag from being squeezed out of the oil inlet after inflation.
What is the most appropriate pressure to fill the airbag?
When the air bag is pre filled with air, it must not be filled with dead air. How much is appropriate?
Foreigners generally think that it is more appropriate to keep the inflation pressure between 60% and 80% of the minimum pressure of the system, while domestic generally think that the inflation pressure can be kept at 90% of the minimum pressure of the system. No matter what the percentage is, its main purpose is to ensure that when the system is at the lowest working pressure, a certain safety distance can be maintained between the airbag and the on-off valve.
This safety distance can not only ensure that when the system is at the lowest working pressure, a small amount of oil can be stored in the reserved space between the air bag and the on-off valve; but also ensure that when the air bag expands to release pressure, the air bag will not directly impact the on-off valve, causing physical damage.
The inflation pressure is too high or too low
If the inflation pressure is too low, then when the system starts to work, the air bag will be directly squeezed into a small ball by the hydraulic oil, so the accumulator can not play any role; if the inflation pressure is too high, the air bag will squeeze the on-off valve, and the sharp edge of the on-off valve core is likely to cut the air bag.
For more knowledge of hydraulic accumulator, please contact Hangzhou oke Hydraulic Technology Co., Ltd