Selection of spring shock absorber in various equipment
In steel plants, power plants, oil plants, cement plants and other industries, there are various types of pipelines and equipment, and they will choose to add some components for maintenance according to the request. These industries have a high demand for pipelines, so most of them use spring dampers in the center. But spring damper
There are many varieties, so there is a request for its selection.
1. The outer surface of shell and spring shall be treated by: paint baking, galvanizing, zinc aluminum treatment and other methods to prevent the vibration isolator from rusting in a short time, thus affecting the service life of the shock absorber. It is better not to use the products treated by paint spraying;
2. The longitude between the operating frequency of the equipment and the natural frequency of the spring damper shall be greater than
3. How to ensure that the vibration isolation efficiency is above 85% under this condition;
4. The spring degree stiffness and vertical stiffness shall be greater than or equal to 1, and the ratio between the requested spring diameter and the spring height after the rated negative pressure shall be greater than 0.7, so as to ensure the stability of the spring damper degree direction;
5. Suitable spring shock absorber shall be selected as the guide line of the instant device.
As long as the right spring damper is selected, it can play its role more effectively. If the wrong model is selected, it may not only fail to maintain, but may backfire, causing unnecessary damage to pipes or equipment.

Material selection guide for stainless steel pneumatic butterfly valve
Guide for selection of stainless steel pneumatic butterfly valve. Most consumer enterprises of stainless steel pneumatic butterfly valves analyze the causes of the failure of the bellows compensator contraction joint, and find that the failure during operation is mainly manifested in two ways: corrosion leakage and instability deformation, of which corrosion failure is the majority. From the dissection of corrosion failure bellows, it is found that corrosion failure is usually divided into pitting corrosion perforation and stress corrosion cracking, of which chloride ion stress corrosion cracking accounts for about 95% of the total corrosion failure. Therefore, correct selection of bellows manufacturing data and structure, reasonable design of waveform parameters and fatigue life, assurance of device quality and other measures can greatly improve the safety and reliability of bellows compensator contraction joints.
In design, the stability of stainless steel pneumatic butterfly valve should be considered to prevent the instability of bellows. The material shows that the compensation amount of bellows depends on its fatigue life. The higher the fatigue life, the smaller the single wave compensation amount of bellows. In order to reduce the cost and improve the single wave compensation, the lower the allowable fatigue life, the greater the longitudinal bending stress of the bellows caused by displacement, and the higher the comprehensive stress, which greatly reduces the stability of the bellows. When the allowable service life of the bellows design is low, not only the meridian comprehensive stress is high, but also the circumferential stress is relatively high, which makes the bellows enter plastic deformation quickly, leading to the instability of the bellows and causing failure.
The stainless steel pneumatic butterfly valve is widely used in many industries. In addition to considering good compensation ability, reliability is the key to the bellows compensator contraction joint. However, the reliability is guaranteed through multiple links such as design and manufacturing, and the neglect of any link will lead to the reduction of the life of the compensator and even failure.
In addition to design, the data selection of stainless steel pneumatic butterfly valve is also quite critical. For the selection of materials used for bellows, in addition to the working medium, working temperature and external environment, the possibility of stress corrosion, the impact of water treatment agent and pipeline cleaning agent on the data, etc. should also be considered, and on this basis, the welding and forming of bellows data, as well as the performance cost ratio of the data should be separated, so as to select the applicable bellows manufacturing data that meet the working conditions.