The vibration damping products include butterfly valve vibration damper, vibration damper, fan vibration damper, air conditioner vibration damper, damping butterfly valve vibration damper, etc., which are generally used for foundation vibration damping of water pump, fan, water chiller, diesel engine and other equipment, as well as vibration damping of various fan coil units, fresh air units, air ducts and other hoisting equipment.
When it comes to damping butterfly valve shock absorber, many people will blurt out its two advantages, namely, the low frequency of butterfly valve shock absorber and the large damping of shock absorber. These two advantages directly avoid the inherent resonance amplitude of steel butterfly 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 damper of the damping butterfly valve 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 of damping butterfly valve can bear great weight. It can be said that the damper has many advantages. This has greatly increased its demand, and many other shock absorbers are replaced by damping butterfly valve shock absorbers.
Damping butterfly valve shock absorber and shock absorber have something in common, that is, they both have the ability to isolate vibration, reduce noise and protect equipment from damage caused by vibration. These are the common characteristics of the two, so what are the differences between the two? The damper of the damping butterfly valve 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 butterfly valve shock absorber has the double advantages of low frequency of the butterfly valve shock absorber and large damping of the shock absorber. Combining the advantages of the two, the phenomenon of amplitude surge when the butterfly valve shock absorber resonates is eliminated, and the problem of high natural frequency of the shock absorber is solved.
Different damping butterfly valve shock absorbers have different functions, but generally speaking, the selection of damping butterfly valve shock absorber specifications really depends on the pipeline, as will be discussed below. In fact, the damping butterfly valve damper can be called pipeline 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 butterfly valve damper is also strict. Its quality directly affects the operation progress.
Then how to select the butterfly valve damper accordingly? The surface treatment of shell and butterfly valve shall be conducted 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 butterfly valve damper should be greater than 3. How can the vibration isolation efficiency be guaranteed to be more than 85% in this case; The horizontal rigidity and vertical rigidity of butterfly valve shall be greater than or equal to 1. The ratio between the butterfly valve diameter and the butterfly valve height after rated negative pressure shall be greater than 0.7. To ensure the horizontal stability of the butterfly valve damper;
Proper butterfly valve shock absorber shall be selected based on the principle of convenient installation. So let's go back and say that the selection of damper specifications of damping butterfly valve depends on the amount of anti vibration force required to prevent pipeline vibration, The specification of the butterfly valve of the valve shall be selected according to the accurate value calculated and the initial force of the butterfly valve preloading shall be determined.
Otherwise, the specification of valve butterfly valve can be selected according to the nominal diameter of the pipeline. The electric butterfly valve of butterfly valve is to reduce or eliminate the periodic vibration or instantaneous impact caused by the irregular flow of medium, wind force, water hammer (or steam hammer), earthquake and other reasons of the pipeline through the valve, the rigidity of butterfly valve and the initial force of butterfly valve pre compression, which can improve the natural vibration frequency of the whole 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.