Vibration damping products include ball valve vibration damper, vibration damper, fan vibration damper, air conditioner vibration damper, damping ball valve vibration damper, etc., which are generally used for foundation vibration reduction of water pump, fan, water chiller, diesel engine and other equipment, as well as vibration reduction of various fan coil units, fresh air unit, air duct and other lifting equipment.
When it comes to damping ball valve shock absorber, many people will blurt out its two advantages, namely, the low frequency of ball valve shock absorber and the large damping of shock absorber. These two advantages directly avoid the inherent resonance amplitude of steel ball valve. It can be said that these two advantages directly cover its other advantages. In fact, it has many other advantages.
The vibration isolation efficiency of the damping ball valve damper is more than 80%, and the design life can reach 30 years, almost maintenance free; The shock absorber does not need to be fixed by bolts, but is fixed by a fixed base plate, which can facilitate the positioning and leveling of the shock absorber; Damping is liquid damping, imported from Germany; Eliminate dynamic load without foundation; Improve the seismic function and quickly resume production; Protect equipment, reduce failure rate and extend service life; Shorten process flow, improve work efficiency and plant utilization; The damper ball valve shock absorber can bear great weight. It can be said that there are many advantages of damping ball valve shock absorber. This has greatly increased its demand. Many places where other shock absorbers are used are changed to damping ball valve shock absorbers.
Damping ball valve shock absorber and shock absorber have some things in common, which are vibration isolation, noise reduction and protection of equipment damage caused by vibration. These are the common characteristics of the two, so what are the differences between the two? The damping ball valve damper is applicable to the working environment of - 20 ℃ - 80 ℃. Its natural frequency is between 1.5HZ-4.9HZ within the normal working load range, and the damping ratio is 0.065. It is an ideal vibration reduction product for air conditioners, thermostatic equipment, fans, cooling towers, refrigeration units, compressors, pumps and other airborne equipment.
The effect of the shock absorber at low temperature will become worse and worse. Sometimes the temperature is too low, resulting in freezing and fragmentation! The damping ball valve shock absorber has the double advantages of low frequency of the ball valve shock absorber and large damping of the shock absorber. Combining the advantages of the two, the phenomenon of amplitude surge when the ball valve shock absorber resonates is eliminated, and the problem of high natural frequency of the shock absorber is solved.
Different damping ball valve shock absorbers have different functions, but generally speaking, the selection of damping ball valve shock absorber specifications really depends on the pipeline, as will be discussed below. In fact, the damping ball valve damper can be called as the pipe damper in the pipeline. It is widely used in various pipelines and equipment in steel, power generation, petrochemical, cement and other industries. The selection of ball valve damper is also strict, and its quality directly affects the operation progress.
How to select the ball valve damper accordingly? The surface treatment of shell and ball valve shall be carried out by baking paint treatment, galvanizing treatment, zinc aluminum treatment and other methods to avoid corrosion of vibration isolator in a short time, thus affecting the service life of vibration isolator. It is better not to use products with painted surface treatment; The longitude between the operating frequency of the equipment and the natural frequency of the ball valve damper should be greater than 3. In this case, how can the vibration isolation efficiency be guaranteed to be more than 85%; The horizontal rigidity and vertical rigidity of ball valve shall be greater than or equal to 1. The ratio between the diameter of ball valve and the height of ball valve after rated negative pressure shall be greater than 0.7. To ensure the horizontal stability of the ball valve damper;
Proper ball valve vibration damper shall be selected based on the principle of convenient installation. So let's go back and say that the selection of the specifications of the damping ball valve damper depends on the amount of anti vibration force required to prevent pipeline vibration, The specification of the valve and ball valve shall be selected according to the accurate value calculated, and the initial force of the ball valve preloading shall be determined.
Otherwise, the specification of the valve ball valve can be selected according to the nominal diameter of the pipeline. Ball valve pneumatic butterfly valve is used to reduce or eliminate the periodic vibration or instantaneous impact caused by irregular flow of medium, wind force, water hammer (or steam hammer), earthquake and other reasons of the pipeline through the valve, the stiffness of the ball valve and the initial force of ball valve pre compression, which can improve the natural vibration frequency of the entire pipeline system. It shall be kept away from the pipeline vibration frequency caused by external interference, so as to avoid pipeline resonance and reduce the additional stress caused by pipeline vibration.