Latest

[admin]

As a key actuator in the hydraulic system, the welding hydraulic cylinder is widely used in various types of equipment such as engineering machinery, agricultural equipment, industrial automation, material handling, etc. It is favored by users for its compact structure, strong pressure bearing capacity, and convenient installation. However, during long-term operation or high-load use, some users will find that the hydraulic cylinder has "abnormal noise" phenomenon, such as metal impact sound, friction sound, creaking sound, etc., which often indicates that there may be problems inside the system. If not handled properly, it will not only affect the efficiency of the equipment, but also may cause hydraulic cylinder failure or even system paralysis.

So, what should I do if the welding hydraulic cylinder makes abnormal noise during use? This article will comprehensively analyze the four aspects of the cause of abnormal noise, troubleshooting steps, solutions and preventive measures to help users make timely judgments and handle them, and improve the safety and reliability of equipment operation.

1. Six common causes of abnormal noise in welding hydraulic cylinders

1.1 Air mixed into the hydraulic system

This is one of the most common sources of abnormal noise. When air is mixed into the hydraulic oil, bubbles will form in the oil, causing "explosive sounds" or "hissing sounds" when the hydraulic cylinder is working.

Cause:

The exhaust is not fully exhausted at the beginning of startup;

The hydraulic system is not tightly sealed, and the negative pressure sucks in air;

The oil tank level is too low, and the oil suction pipe is emptied.

Solution:

Check whether the system is equipped with an exhaust valve and perform thorough exhaust;

Check whether the oil suction pipe is loose or broken;

Refill the hydraulic oil to the normal level.

1.2 Hydraulic oil contamination or oil quality deterioration

Poor quality or contaminated hydraulic oil contains impurity particles or moisture, which may cause the friction parts inside the hydraulic cylinder to wear more severely, and produce dry friction sound or harsh noise.

Cause:

The oil filter is damaged or not replaced in time;

The hydraulic oil is used for more than the recommended time;

The oil storage environment is not clean.

Solution:

Replace with high-quality hydraulic oil;

Replace or clean the filter regularly;

Strengthen oil management to ensure the cleanliness of the system.

1.3 Wear of piston rod or guide sleeve

There is a gap between the piston rod and the cylinder barrel of the welded hydraulic cylinder. When the piston rod is bent or the guide sleeve is severely worn, it will cause metal impact or vibration during operation.

Cause:

The hydraulic cylinder is overloaded or sideways for a long time;

There are strong impact conditions in the use environment;

There are defects in the manufacturing process.

Solution:

Stop the machine to check the straightness of the piston rod;

Replace the worn guide sleeve and seal;

Optimize the installation position to avoid overload.

1.4 Failure of the buffer device

Some welded hydraulic cylinders have a buffer function to slow down the impact of the piston at the end of the stroke. If the buffer device is stuck or improperly adjusted, the cylinder body will make a "bang bang" sound at the end of the stroke.

Cause:

The buffer throttle hole is blocked;

The buffer valve core is stuck;

The oil flow rate is too high to form a buffering effect.

Solution:

Clean the buffer throttle channel;

Check whether the valve core moves flexibly;

Adjust the buffer stroke to match the flow rate.

1.5 Welding quality problems lead to structural looseness

As a structural fixing method, welding quality directly affects the stability of the hydraulic cylinder. If there are cracks or cold welds in the weld, the cylinder body or bracket may become loose and emit mechanical vibration sounds.

Cause:

Improper control of welding current and time during production;

Inadequate material pretreatment;

The hydraulic cylinder is subjected to excessive impact load.

Solution:

Check whether the weld is complete;

Re-weld and reinforce the cracks;

Add reinforcement ribs or shockproof treatment in the design.

1.6 Valve group failure or improper control logic

The abnormal noise of the hydraulic cylinder is sometimes not a problem with the cylinder body itself, but improper control of the upstream hydraulic valve, such as too fast opening and closing of the solenoid valve, large reversing impact, etc., which causes the cylinder body to vibrate violently and make noise during the controlled process.

Cause:

The reversing valve responds too fast;

The system pressure fluctuates violently;

No transition circuit design.

Solution:

Use slow-closing solenoid valve or adjust the switching speed;

Optimize the control logic to make the cylinder body move more smoothly;

Add a relief valve to relieve system pressure.

2. Maintenance suggestions for preventing abnormal noise of welding hydraulic cylinders

Regular maintenance:

Replace hydraulic oil;

Clean the filter;

Check the integrity of the cylinder body and welds.

Installation specifications:

Avoid eccentric loads;

The brackets and connectors must be strictly aligned;

Install anti-vibration pads to reduce vibration transmission.

Operation monitoring:

Install pressure sensors and temperature monitoring;

Introduce intelligent diagnostic systems to warn of abnormal operation.

Standardized operation:

Avoid sudden start and stop;

Avoid high temperature and high frequency continuous operation;

Establish equipment operation logs to record the operating status and abnormal sound timing.

The abnormal sound problem of the welding hydraulic cylinder seems small, but it actually reflects an important signal of the system's operating status. If it is not taken seriously, it may lead to performance degradation at the least, equipment failure and shutdown at the worst, and even safety hazards. Therefore, it is recommended that users strengthen inspection and maintenance in daily use. Once abnormal sound occurs, promptly find out the cause and treat it symptomatically.

As a key component of hydraulic equipment, the stable operation of the welding hydraulic cylinder not only depends on high-quality design and manufacturing technology, but also depends on the scientific maintenance of the user. Through the systematic analysis of this article, it is hoped that practical guidance ideas can be provided for hydraulic cylinder users to reduce unnecessary losses caused by abnormal sound and ensure efficient, safe and long-term operation of equipment.

If you are looking for welding hydraulic cylinder products with higher performance and optimized design to resist abnormal noise, please contact us. We can provide customized solutions and technical support according to your working conditions.

http://www.toringcylinder.com
Ningbo Toring Machinery Manufacturing Co., Ltd.

[Author]

Posts