Measuring Method of Nitrogen Charge Pressure of Accumulator Bladder NXQ-A-10/10-F-Y

In the hydraulic system, the NXQ-A-10/10-F-Y accumulator bladder is a key component for energy storage and buffering, and its performance directly affects the stability and safety of the system. The pre-charged nitrogen pressure of the accumulator bladder is one of the core parameters to ensure its normal operation. If the pre-charged pressure is set improperly, it may not only cause the accumulator to fail, but also cause equipment damage or safety accidents. Therefore, scientifically and standardizedly measuring the pre-charged nitrogen pressure of the accumulator bladder is an important part of maintaining the efficient operation of the hydraulic system.

I. Why is the pre-charged nitrogen pressure of the accumulator bladder important?

The working principle of the accumulator bladder NXQ-A-10/10-F-Y is based on the interaction between gas and hydraulic oil. By pre-charging nitrogen, the accumulator bladder can store energy in the hydraulic system and release or absorb hydraulic oil when the pressure fluctuates, thereby achieving functions such as buffering, energy storage or compensation for thermal expansion. However, the setting of the pre-charged nitrogen pressure is not arbitrary, but needs to be precisely adjusted according to the specific working conditions of the hydraulic system. For example, if the pre-charge pressure is too low, the accumulator bladder may not be able to store energy effectively; if the pressure is too high, the bladder may be over-compressed or even ruptured, affecting the life and safety of the equipment.

Therefore, measuring the pre-charge nitrogen pressure of the accumulator bladder NXQ-A-10/10-F-Y is not only to verify whether its current state meets the design requirements, but also to ensure the long-term stable operation of the hydraulic system. This process requires the operator to have professional knowledge and a rigorous attitude to ensure that each step complies with safety regulations.

II. Key steps for safely measuring the pre-charge nitrogen pressure of the accumulator bladder

1. Preparation stage: confirmation of the environment and tools

Before measuring the pre-charge nitrogen pressure of the accumulator bladder NXQ-A-10/10-F-Y, it is necessary to ensure the safety of the working environment and the applicability of the tools. First, the hydraulic system should be completely depressurized to avoid operating the accumulator bladder under high pressure to prevent accidental leakage or explosion risks. Secondly, it is necessary to use special inflation tools and pressure gauges. These tools are usually equipped with well-sealed connection interfaces, which can accurately measure the pressure value and avoid nitrogen leakage from causing harm to the operator.

In addition, before measurement, it is necessary to check whether the appearance of the accumulator bladder is damaged, cracked or aged. If obvious damage is found on the surface of the bladder, the operation should be stopped immediately and the parts should be replaced to avoid bladder rupture accidents during the measurement process.

2. Selection and implementation of measurement methods

There are two main methods for measuring the pre-charged nitrogen pressure of the accumulator bladder NXQ-A-10/10-F-Y: indirect measurement method and direct measurement method.

Indirect measurement method: detection through the return oil pipeline of the hydraulic system. The specific operation is to install a stop valve on the pipeline between the oil inlet of the accumulator and the oil tank, and connect a pressure gauge to the front end of the stop valve. Then, slowly open the stop valve to return the hydraulic oil to the oil tank, and observe the reading of the pressure gauge. When the pressure gauge pointer changes from slowly falling to rapidly returning to zero, the pressure value at this time is the pre-charged nitrogen pressure of the accumulator bladder. This method does not require direct contact with nitrogen and is safer, but measurement errors may occur due to residual system pressure or pipeline resistance.

Direct measurement method: Use a dedicated inflation tool to directly connect the air valve of the accumulator bladder, and read the nitrogen pressure value through the built-in pressure gauge of the tool. This method has higher accuracy, but it is necessary to ensure that the inflation tool and the air valve are well sealed to avoid nitrogen leakage during the measurement process. In addition, attention should be paid to the operating force during direct measurement to avoid damage to the interface due to over-tightening or loosening of the air valve.

Regardless of the method used, the hydraulic system must be kept in a pressure-free state during the measurement process, and additional mechanical stress should be avoided on the accumulator bladder to prevent deformation or damage to the bladder.

3. Data recording and calibration

After the measurement is completed, the pre-charged nitrogen pressure value needs to be recorded and compared with the standard value recommended by the manufacturer. If there is a deviation between the actual pressure value and the standard value, it needs to be adjusted according to the specific needs of the hydraulic system. For example, if the accumulator bladder NXQ-A-10/10-F-Y is used for energy storage, its pre-charge pressure should usually be lower than 90% of the system’s minimum working pressure; when used for pulsation damping, the pressure needs to be set to about 60% of the average pulsation pressure.

In addition, the measuring tool itself needs to be calibrated regularly to ensure the accuracy of its readings. If there is an error in the pressure gauge or the charging tool, the measurement results may be distorted, which in turn affects the performance evaluation of the accumulator bladder.

III. Common problems and coping strategies in accumulator bladder measurement

1. Troubleshooting of abnormal pre-charge pressure

In actual measurement, if it is found that the pre-charge nitrogen pressure of the accumulator bladder deviates significantly from the standard value, the following potential causes need to be checked:

Aging or damage of the bladder: The bladder material may have tiny holes or reduced elasticity over time, resulting in slow gas leakage. At this time, the bladder needs to be replaced and refilled with nitrogen.

Insufficient sealing of the gas valve: If the gas valve is poorly sealed due to wear or dirt, it may cause continuous nitrogen leakage. The air valve assembly needs to be cleaned or replaced, and the pressure needs to be remeasured.

Improper nitrogen charging operation: If the slow inflation principle is not followed during the nitrogen charging process, uneven pressure distribution in the bladder may occur, which will affect the measurement results. At this time, it is necessary to re-charge and measure according to the standard operating procedures.

2. Avoidance of safety risks

The measurement process of the accumulator bladder NXQ-A-10/10-F-Y involves the interaction between high-pressure gas and hydraulic oil. The following points should be paid special attention to during operation:

It is forbidden to use oxygen or air for charging: Nitrogen, as an inert gas, can effectively avoid chemical reactions between the bladder and the hydraulic oil. If oxygen or air is misused, it may cause oxidation or explosion risks of the bladder.

Avoid operation in high temperature environment: High temperature will accelerate the aging of the bladder material and may cause abnormal increase in nitrogen pressure. When measuring, a well-ventilated and temperature-appropriate environment should be selected.

Regularly check the sealing of the interface: If the connection between the inflation tool and the air valve is loose or worn, leakage may occur during the measurement process. Aging parts need to be checked and replaced regularly.

IV. Long-term maintenance and pressure management of accumulator bladder

The pre-charged nitrogen pressure of the accumulator bladder NXQ-A-10/10-F-Y is not constant, and it fluctuates with the use time, ambient temperature and system load. Therefore, it is crucial to establish a regular maintenance mechanism. It is recommended to measure the pressure once a week in the first few weeks after the accumulator bladder is put into use, and then check it once a month. After half a year, it can be adjusted to once every six months, and finally form an annual routine inspection system.

In addition, when the accumulator bladder is out of use for a long time, its pre-charge pressure should be kept slightly higher than the minimum working pressure of the system to prevent the bladder from deforming or sticking due to long-term low pressure. If the accumulator bladder needs to be disassembled and repaired due to a malfunction, be sure to drain the hydraulic oil and nitrogen pressure first, and then replace the parts to avoid the danger caused by the sudden release of high-pressure gas.

When looking for high-quality, reliable accumulator bladders, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:
E-mail: sales@yoyik.com
Tel: +86-838-2226655
Whatsapp: +86-13618105229

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