Products knowledge
globe valve---2009-10-19
1, increasing rigidity
of the oscillations and a slight vibration, can increase the stiffness to eliminate or reduce, such as the large selection of spring stiffness in favor of implementing agencies such as the piston approaches are feasible.
£ £
2, to increase damping method
an increase of the vibration damping to increase the friction, such as the valve plug valve sleeve can be used "O" ring sealed and have greater friction with filler such as graphite, which is to eliminate or reduce the vibration of a minor or have a certain effect The.
3, increase the size of orientation, reducing the gap with France
general orientation axis plug valve sizes are small, with the clearance of all valves are generally larger, there are 0.4 ~ lmm, which produces mechanical vibration is helpful. Thus, in the event of a slight mechanical vibration can be driven by increasing size, with the gap reduced to weaken the vibration.
4, change the shape of cutting pieces to eliminate resonance method
due to the so-called local oscillator globe valve occurred in the high-speed flow, the pressure of the throttle rapidly changing population, changing the shape of cutting pieces of local oscillator frequency can be changed, in the resonance is not strong, they are less easy to resolve. Specific method is opening in the vibration within the spool surface turning 0.5 ~ 1.0mm. If family members near a factory installed a self-pressure regulating globe valve, due to resonance effects produced whistle workers rest, we will spool 0.5mm off the surface cars, the resonant howling away.
5, replacing throttle parts to eliminate resonance method
principles with 4.5 in the 4), simply replace the throttle parts. The methods are: ¢Ù the replacement flow characteristics, to change the number of linear, logarithmic linear change; ¢Ú replace the spool form. If the plug-shaped shaft changed to "V"-shaped groove spool, the two-seater into a sleeve type plug valve shaft type; will open a window into the sleeve of the sleeve holes to play and so on. If a nitrogen fertilizer plant, one Taiwan, two-seater DN25 valve stem junction with the spool off the regular vibration, we are recognized as a resonance, it will be replaced by a straight line features a number of spool valve core, the problem is resolved. Another example of a laboratory with a single Aviation Institute DN200 sleeve valve, plug valve produced a strong rotation can not be put into use, will open the window of the sleeve into the sleeve holes to play after the rotation immediately disappear.
6, replace the globe valve type to eliminate the resonance
different structural forms of control valve, the inherent nature of different frequencies, the replacement globe valve type is fundamentally eliminate the resonance of the most effective method. A valve in use is very powerful --- strongly resonant vibration (can be severe valve damage), a strong rotation (or even vibration Stem been broken, is broken), and produced a strong noise (up to more than 100 db) of the valve, as long as it is replaced with a quite different structure of the valve, immediately effective, a strong resonance miraculously disappear. If a new plant expansion project selection Vinylon a DN200 sleeve valve, the above-mentioned three kinds of phenomena exist, DN300 beating along the pipeline, valve plug rotation, the noise more than 100 db, resonant opening 20 ~ 70%, given the resonance opening degree in favor of a two-seat valve, the resonance disappeared, put into operation to normal.
7, reduce cavitation vibration method
rupture due to cavitation bubble cavitation resulting from vibration, the natural should find ways on reducing cavitation. ¢Ù Let bubble burst generated by the impact energy of not acting on solid surface, especially on the spool, but to allow the liquid to absorb. Sleeve valve on this character, so you can change the shaft sleeve-type plug-type spool. ¢Ú to take every possible means to reduce cavitation, such as increased throttle resistance, increasing the flow of population pressure reduction, classification, or series decompression.
8, to avoid the local oscillator wave hit France
external local oscillator globe valve vibration caused by wave attack, which is obviously regulating valve normal working hours should avoid, and if they have such vibration should take corresponding measures.
of the oscillations and a slight vibration, can increase the stiffness to eliminate or reduce, such as the large selection of spring stiffness in favor of implementing agencies such as the piston approaches are feasible.
£ £
2, to increase damping method
an increase of the vibration damping to increase the friction, such as the valve plug valve sleeve can be used "O" ring sealed and have greater friction with filler such as graphite, which is to eliminate or reduce the vibration of a minor or have a certain effect The.
3, increase the size of orientation, reducing the gap with France
general orientation axis plug valve sizes are small, with the clearance of all valves are generally larger, there are 0.4 ~ lmm, which produces mechanical vibration is helpful. Thus, in the event of a slight mechanical vibration can be driven by increasing size, with the gap reduced to weaken the vibration.
4, change the shape of cutting pieces to eliminate resonance method
due to the so-called local oscillator globe valve occurred in the high-speed flow, the pressure of the throttle rapidly changing population, changing the shape of cutting pieces of local oscillator frequency can be changed, in the resonance is not strong, they are less easy to resolve. Specific method is opening in the vibration within the spool surface turning 0.5 ~ 1.0mm. If family members near a factory installed a self-pressure regulating globe valve, due to resonance effects produced whistle workers rest, we will spool 0.5mm off the surface cars, the resonant howling away.
5, replacing throttle parts to eliminate resonance method
principles with 4.5 in the 4), simply replace the throttle parts. The methods are: ¢Ù the replacement flow characteristics, to change the number of linear, logarithmic linear change; ¢Ú replace the spool form. If the plug-shaped shaft changed to "V"-shaped groove spool, the two-seater into a sleeve type plug valve shaft type; will open a window into the sleeve of the sleeve holes to play and so on. If a nitrogen fertilizer plant, one Taiwan, two-seater DN25 valve stem junction with the spool off the regular vibration, we are recognized as a resonance, it will be replaced by a straight line features a number of spool valve core, the problem is resolved. Another example of a laboratory with a single Aviation Institute DN200 sleeve valve, plug valve produced a strong rotation can not be put into use, will open the window of the sleeve into the sleeve holes to play after the rotation immediately disappear.
6, replace the globe valve type to eliminate the resonance
different structural forms of control valve, the inherent nature of different frequencies, the replacement globe valve type is fundamentally eliminate the resonance of the most effective method. A valve in use is very powerful --- strongly resonant vibration (can be severe valve damage), a strong rotation (or even vibration Stem been broken, is broken), and produced a strong noise (up to more than 100 db) of the valve, as long as it is replaced with a quite different structure of the valve, immediately effective, a strong resonance miraculously disappear. If a new plant expansion project selection Vinylon a DN200 sleeve valve, the above-mentioned three kinds of phenomena exist, DN300 beating along the pipeline, valve plug rotation, the noise more than 100 db, resonant opening 20 ~ 70%, given the resonance opening degree in favor of a two-seat valve, the resonance disappeared, put into operation to normal.
7, reduce cavitation vibration method
rupture due to cavitation bubble cavitation resulting from vibration, the natural should find ways on reducing cavitation. ¢Ù Let bubble burst generated by the impact energy of not acting on solid surface, especially on the spool, but to allow the liquid to absorb. Sleeve valve on this character, so you can change the shaft sleeve-type plug-type spool. ¢Ú to take every possible means to reduce cavitation, such as increased throttle resistance, increasing the flow of population pressure reduction, classification, or series decompression.
8, to avoid the local oscillator wave hit France
external local oscillator globe valve vibration caused by wave attack, which is obviously regulating valve normal working hours should avoid, and if they have such vibration should take corresponding measures.
