What should I do if the buffering effect of the hydraulic cylinder is not good?

As an important actuator in the hydraulic system, the performance of the hydraulic cylinder directly affects the working efficiency and stability of the entire system. In practical applications, the poor buffering effect of the hydraulic cylinder is a common problem, which not only leads to unstable operation of the equipment but also may cause noise, vibration, and other problems. In severe cases, it may even damage the hydraulic cylinder or shorten its service life. This article will discuss in detail the reasons for the poor buffering effect of the hydraulic cylinder and propose corresponding solutions.

1. Reasons for poor buffering effect of hydraulic cylinders

Irrational design of buffer device

The buffer device of the hydraulic cylinder usually includes mechanical and hydraulic types. Mechanical buffer devices such as springs and rubber pads have a buffering effect that depends on the performance of the material and the installation position; hydraulic buffer devices achieve buffering by adjusting the flow of oil. If the design of the buffer device is unreasonable, such as insufficient spring stiffness, aging of rubber pads, improper adjustment of the throttle valve, etc., the buffering effect will be poor.

Improper setting of hydraulic system parameters

Improper setting of parameters such as pressure and flow of the hydraulic system will also affect the buffering effect of the hydraulic cylinder. For example, when the system pressure is too high, the hydraulic cylinder will generate a large impact force when approaching the end of the stroke; and excessive flow may cause the hydraulic cylinder to move too fast, and the buffer device cannot be effectively used for deceleration.

Wear or damage of seals

The seal is one of the key components to ensure the normal operation of the hydraulic cylinder. If the seal is worn or damaged, it will cause hydraulic oil leakage, which will affect the working pressure and movement speed of the hydraulic cylinder, and ultimately lead to poor buffering effect.

Bending or deformation of the piston rod

The bending or deformation of the piston rod will cause the hydraulic cylinder to generate lateral force during movement, which will not only increase friction but also affect the normal operation of the buffer device, resulting in a decrease in the buffering effect.

Air intrusion into the hydraulic system

After air enters the hydraulic system, it will be compressed under high pressure to form cavitation. These cavitations will suddenly release energy during the movement of the hydraulic cylinder, generating shock waves, which seriously affect the buffering effect.

2. Measures to solve the poor buffering effect of the hydraulic cylinder

Optimize the design of the buffer device

For the problem of unreasonable design of the buffer device, the following measures can be taken:

Select suitable buffer materials: Select materials with good elasticity and wear resistance according to actual working conditions, such as polyurethane, polytetrafluoroethylene, etc.

Adjust the throttle valve: For hydraulic buffer devices, the oil flow rate can be controlled by adjusting the throttle valve to achieve an ideal buffering effect.

Increase the buffer distance: Increase the buffer distance appropriately so that the hydraulic cylinder has enough time to slow down when approaching the end of the stroke.

Reasonably set the hydraulic system parameters

In order to ensure that the hydraulic cylinder has a good buffering effect, it is necessary to reasonably set the parameters of the hydraulic system:

Reduce the system pressure: Under the premise of ensuring the normal operation of the equipment, try to reduce the system pressure and reduce the impact force of the hydraulic cylinder when approaching the end of the stroke.

Control the flow: Control the movement speed of the hydraulic cylinder by adjusting the displacement of the pump or using a variable pump to avoid a poor buffering effect due to excessive speed.

Use accumulators: Installing accumulators in the hydraulic system can release energy when the hydraulic cylinder approaches the end of the stroke and plays a buffering role.

Regularly check and maintain seals

Wear or damage of seals is one of the important reasons for the poor buffering effect of hydraulic cylinders. Therefore, it is very important to regularly check and maintain seals:

Regularly replace seals: According to the use of the equipment and the manufacturer's recommendations, replace the seals regularly to ensure that they are in good condition.

Strengthen daily maintenance: In daily use, pay attention to whether the hydraulic cylinder has oil leakage and deal with the problems found in time.

Prevent the piston rod from bending or deforming

Bending or deformation of the piston rod will not only affect the buffering effect but may also cause damage to the hydraulic cylinder. To prevent this from happening, the following measures can be taken:

Strengthen the support structure: Make sure that the hydraulic cylinder is firmly installed to avoid the ending of the piston rod due to deadweight or external force.

Use a guide sleeve: Install a guide sleeve on the piston rod to reduce the impact of lateral force on the piston rod.

Check the piston rod regularly: Check the piston rod regularly for bending or deformation, and repair or replace it if necessary.

Exclude air from invading the hydraulic system

Air entering the hydraulic system will have a serious impact on the buffering effect. To exclude air, the following measures can be taken:

Set up an exhaust device: Set up a special exhaust device in the hydraulic system, such as an exhaust valve, exhaust plug, etc., to exhaust air at startup.

Start slowly: When starting the hydraulic system, run it at a lower speed for a period of time, and then gradually increase the speed after the air is naturally exhausted.

Keep it clean: Keep the hydraulic system clean, prevent dust and other impurities from entering the system, and reduce the possibility of air intrusion.

Poor buffering effect of hydraulic cylinders is a complex problem involving multiple factors. By optimizing the design of the buffer device, setting the hydraulic system parameters reasonably, regularly checking and maintaining the seals, preventing the piston rod from bending or deforming, and eliminating the intrusion of air into the hydraulic system, the buffering effect of the hydraulic cylinder can be effectively improved, and the stability and service life of the equipment can be improved. In actual work, appropriate measures should be taken according to the specific situation to ensure that the hydraulic cylinder can operate stably and efficiently.

As a hydraulic cylinder vendor, we are committed to providing hydraulic cylinder products with high quality, reliability and excellent performance. Our hydraulic cylinders use advanced technology and innovative design to meet the needs of various industrial applications. We also provide customized solutions to meet customer-specific needs.

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Ningbo Toring Machinery Manufacturing Co., Ltd.