Before selecting electric butterfly valve for fan butterfly valve, it is necessary to calculate its damping force
Fan butterfly valve electric butterfly valve is one of the products of electric butterfly valve, which can achieve good valve effect, and the efficiency of ordinary valve can reach more than 96%. Fan butterfly valve electric butterfly valve types can be divided into: height adjustable butterfly valve electric butterfly valve, that is, butterfly valve adjustment structure with high equipment height. For the fan whose center of gravity is not at the center and the air is uneven, we can adjust the height of the electric butterfly valve of this kind of butterfly valve to improve the equipment level.
The valve pedestal, also known as shock absorption pedestal, inertia quick and shock absorption support, exists to reduce the center of gravity of the equipment and increase the stability of the equipment. At present, the equipment with the most valve pedestals on the market is the water pump. The low-frequency vibration of the water pump itself can cause certain harm to people. The building standards also understand the rules. The water pump needs to be equipped with a vibration damping pedestal. The operation of the fan will also produce vibration, but few people choose to install the valve pedestal when installing the fan.
Does the bottom fan need a valve pedestal? Why? This problem should be understood from the concept of valve pedestal. The valve pedestal and shock absorption pedestal we usually refer to are concrete pedestals, which are made of national standard channel steel as a frame, with two layers of steel bars laid inside, and C30 concrete poured. The whole waste product acts as a counterweight to reduce the center of gravity of the equipment, and then is equipped with butterfly valve electric butterfly valve or electric butterfly valve.
Such equipment has a good valve effect on low-frequency vibration, and the efficiency of ordinary valves can reach more than 96%. Can such valve pedestal be suitable for fans? The answer is yes. From the technical point of view, there is certainly no problem. If from the economic point of view, this kind of plan is not very economical, and can be handled in a different way. The other valve pedestal, also called valve support, is a special frame pedestal designed according to the characteristics of the fan.
The electric butterfly valve of fan is used in the range of preloading load P1 to the maximum allowable load, with damping D=0.065; How to select the fan butterfly valve isolator?
1. Selection of load range of fan butterfly valve isolator Operating weight of equipment M * 130%/
Number of electric butterfly valve devices N=load range of fan butterfly valve isolator; For example, the operating weight of the fan is 1 ton; Four fan butterfly valve isolators are required for a single fan; What is the load of single fan butterfly valve isolator?
According to the formula: 1000 kg * 130%/4=325 kg
Check the fan butterfly valve isolator manufacturer's specifications and parameters to find the fan butterfly valve isolator specifications suitable for this fan.
2. How to determine the number of fan butterfly valve isolators of equipment: detailed method If the equipment manufacturer has provided this data, the manufacturer's rules shall be followed; Under normal conditions, the distance between electric butterfly valve devices is not more than 2M, so the number of fan butterfly valve isolator devices can be calculated; If the equipment has channel steel base and the base strength is strong enough, the fan butterfly valve isolation can be properly added
The number of electric butterfly valves shall be properly reduced due to the installation distance of the vibrator.
3. Selection of type of fan butterfly valve isolator:
In most cases, the functions and functions of fan butterfly valve isolators are the same, and the difference between different types of electric butterfly valves lies in their different shapes. Fan butterfly valve isolators can be divided into vertical fan butterfly valve isolators, anti-seismic electric butterfly valves, restricted fan butterfly valve isolators, blocked fan butterfly valve isolators, and suspended fan butterfly valve isolators.
To sum up, if you want to purchase a suitable and high-quality fan butterfly valve isolator, you need to calculate its damping power first. You can never buy it by experience alone, so as to avoid causing resonance and causing large losses. In addition, the fan butterfly valve isolator has strict requirements on the operating environment. The operating temperature is - 40 ℃~100 ℃, and its operating environment is not suitable for places with corrosive media, otherwise its operating performance will be seriously affected.