Engineering cylinders often generate noise during operation, which not only affects the normal operation of the equipment, but may also cause trouble to the operator. The generation of noise problems is usually related to factors such as the design, use conditions and maintenance status of the cylinder. The following will discuss the common causes of engineering cylinder noise and the corresponding noise reduction measures.

1. Common causes of engineering cylinder noise
Oil flow noise
The flow of oil in the cylinder will generate fluid noise, especially in the case of high flow rate and large pressure changes, the fluid noise is more obvious. Common flow noises include bubble noise, hydraulic vibration noise, etc.
Cavitation noise
When the hydraulic cylinder is working, cavitation may occur in the hydraulic system, that is, bubbles form in the hydraulic oil in the low-pressure area. When the bubbles burst, strong impact and noise will be generated.
Changes in the working pressure of the hydraulic system
The pressure fluctuations of the hydraulic system may cause vibration or vibration of the cylinder, thereby generating noise. This noise is related to factors such as the adjustment of the system and the working status of the valve.
Friction noise of internal parts of the cylinder
The friction between the piston, seal and cylinder body inside the cylinder will produce noise, especially when the seal is aged, lubricated insufficiently or the parts are worn, the friction noise will increase significantly.
Improper installation of the cylinder
During the installation process, if the cylinder does not fit well with the support frame or other parts, it will cause greater vibration during the operation of the cylinder, thereby generating noise.
Hydraulic oil quality problems
Impurities, moisture, air, etc. in the hydraulic oil will also cause noise, especially when the oil quality is poor or the filtration is improper, the noise problem will be aggravated.

2. Noise reduction measures
Optimize the design of the oil cylinder
Reduce the oil flow rate: Hydraulic cylinder manufacturers optimize the flow and pressure control of the oil cylinder to avoid fluid noise caused by excessive flow rate.
Improve cavitation protection: Adopt anti-cavitation design, adjust the working pressure range of the oil cylinder, and ensure that cavitation is not easy to occur when the hydraulic system is working.
Rationally select materials and surface treatment: Use low-friction materials for internal parts of the oil cylinder (such as pistons, cylinder bodies, seals, etc.), and perform appropriate hardening treatment on their surfaces to reduce friction noise.
Optimize the hydraulic system
Accurately adjust the system pressure: Use a more accurate pressure regulating valve to smoothly control the working pressure of the oil cylinder and reduce the noise caused by pressure fluctuations.
Install shock absorbers: Install shock absorbers at the connection between the hydraulic pipeline and the oil cylinder to effectively reduce the vibration of the hydraulic system and reduce noise.
Use high-quality hydraulic oil: Use high-quality, low-noise hydraulic oil, change the oil regularly, keep the oil clean, and avoid noise caused by impurities in the oil.
Improve sealing
Replace aged seals: Regularly check and replace aged seals to ensure good sealing of the cylinder, reduce leakage and friction, and avoid unnecessary noise caused by poor sealing.
Optimize sealing structure: Adopt multi-stage sealing design to reduce oil leakage in the cylinder and reduce noise caused by friction.
Improve installation and positioning of the cylinder
Correctly install the cylinder: When installing the cylinder, ensure the matching accuracy between the cylinder and the support frame, connectors, etc. to avoid additional vibration and noise caused by improper installation.
Use shockproof support: Install shockproof pads or shock absorbers on the support part of the cylinder to reduce the vibration noise generated during the operation of the cylinder.
Soundproof measures
Install a soundproof cover: For cylinders with loud noise, a soundproof cover can be installed on the outside of the cylinder to reduce noise transmission.
Install sound-absorbing materials: Use sound-absorbing materials such as soundproof cotton and soundproof panels in the working environment around the cylinder to absorb some noise.
Regular maintenance and care
Regular inspection and maintenance: Check the various components of the cylinder and hydraulic system, such as seals, pistons, valves, oil pumps, etc. in time to keep the equipment in good operating condition.
Clean oil: Check the cleanliness of the oil regularly to ensure that the oil does not contain impurities, moisture and air, and avoid noise caused by oil quality problems.

Summary
The solution to the noise problem of engineering cylinders needs to start from multiple aspects such as design, materials, hydraulic systems, installation, and maintenance. By optimizing the design, improving the stability of the hydraulic system, strengthening the sealing and lubrication of the cylinder, and combining some noise reduction measures, the cylinder noise can be effectively reduced and the working performance and service life of the equipment can be improved. In addition, regular maintenance and care by operators is also the key to ensuring the long-term stable operation of the cylinder.