Do not allow pneumatics machine again please ” the platoon is measured ” become a keyword!
For not professional to great majority pneumatics machine user, the standard that judges stand or fall of pneumatics function effect often is comparative the capacity data of the demarcate on nameplate of machine of the pneumatics that be the same as a paragraph, actually this is a serious error!
Small make up a few basic knowledge that bring everybody to understand aspects of next pneumatics function effect together first.
Measure the international general standard of stand or fall of pneumatics function effect: SER compares power
·SER is smaller, can effect is better, omit report more;
·SER is bigger, can effect is poorer, jump over bad news report.
Grade of pneumatics function effect undertakes classificationing according to SER than power, it is with machine of pneumatics of type of fuel injection screw exemple, the rated pressure grade with different basis (0.7MPa, 0.8MPa, 1.0MPa, 1.25MPa) with different and cooling form (wind cold or water-cooling) , GB sets classification mark fiducial value is endless also and same. Active national level is: Air of type of GB 19153-2009 cubage compresses value of functional effect demarcate to reach can effect grade, what need points out is: This standard did not make clear machine of pneumatics of frequency conversion screw and low-pressure machine (for instance type of 3bar, 5bar) can effect classifications directive mark fiducial value, in other words: End at present, have not come on stage formally to press machine and low-pressure type in the light of frequency conversion sky can the national level that effect grade differentiates.
To machine of frequency conversion pneumatics, when pressure or rotate speed both in when any element produces change, its SER also can produce change subsequently than power; So author individual opinion thinks: The energy-saving and more ground of machine of frequency conversion pneumatics is come from at the following 3 main factors, and SER comparing power is not only factor to energy-saving influence.
Flow of aircraft of frequency conversion pneumatics adjusts follow sexual stand or fall, those who follow is better, carry the odds that happen for nothing lower, more energy-saving also (namely: The PID of controller or transducer controls function)
The pressure of machine of frequency conversion pneumatics installs a dot to have only, and machine of labour frequency pneumatics must install a pressure to take, relatively at machine of labour frequency pneumatics character, machine of frequency conversion pneumatics reduces the loss of the sources of energy that pressure climb brings effectively
Machine of frequency conversion pneumatics can be considered as the equipment of a stepless speed regulation approximately, the concern that its specific power consumption and client use tolerance is OK also and similar regard as shows linear scale; Say popularly: You use how many gas, I with respect to bad news how many report, avoid old horse hauls a car or carry a phenomenon for nothing, achieve for the client’s energy-saving purpose
SER compares the definition of power:
What place of unit exhaust ability needs is overall power input;
SER compares the computation of power:
SER = is overall power input / capacity
SER compares the unit of power:
KW/(m3/min)
Overall power input:
Definition: Show pneumatics accident goes in the general power below rated pressure, include: Advocate drive electric machinery, cooling fan electric machinery (wind cold aircrew) and electrical system all bad news report yuan the summation of power of parts of an apparatus
Unit: KW
When when the client is buying pneumatics machine, at the same time need pays close attention to rated pressure to move actual and overall power input, the goes seeing nameplate demarcate platoon with simple and rather than is measured!
Bit more crucial: (Never Forget)
The power of aircrew nameplate demarcate≠Actual and overall power input
Actual and overall power input is taller, what discharge a quantity to be able to be done is bigger
Pneumatics machine industry grows for years in classics of Chinese all previous, standard of relevant occupation standard is more and more perfect, the phenomenon of ” of mark of “ discharge empty with nameplate simple and crude parameter already was able to control a standard stage by stage; Actually nevertheless different brand “ is the same as the nameplate of power ” type to discharge a quantity to still can produce bigger difference, little a 5-10% , be as high as 15-25% discharge difference even more. For not professional to great majority client, a bit unconscious circle!
Is the truth what kind of? We should learn electric machinery SF patiently to serve the concept of coefficient first:
Electric machinery SF serves coefficient (Service Factor)
Coefficient of electric machinery service is a parameter that measures ability of overload of electric machinery intermittence
Electric machinery serves coefficient to have the following grade commonly usedly: 1.15 / 1.25 /1.35
Electric machinery allows to move inside service coefficient, just electric machinery moves in continuously be more than service coefficient below the bear of 1, fall than moving in rated power, its life also can shorten accordingly; Those who exceed is more, bigger to the influence of electric machinery life.
In a word: Allow actually of electric machinery to move to power can serve the enlarge of coefficient through SF and magnify!
Citing:
Electric machinery name (rated) power: 90kW
When SF=1.15, actually time limit runs power to be able to amount to: 90*1.15=103.5kW
When SF=1.25, actually time limit runs power to be able to amount to: 90*1.25=112.5kW
When SF=1.35, actually time limit runs power to be able to amount to: 90*1.35=121.5kW
So:
90kW pneumatics machine serves the enlarge of coefficient through electric machinery, the empty press that can accomplish 110kW actually is bigger even;
Why the discharge that “ is the same as machine of paragraph ” pneumatics can produce very big difference not fathomless also!
Delimit key:
Allow actually of electric machinery to move to power can serve the enlarge of coefficient through SF and magnify!
The discharge of pneumatics machine can run the enlarge of power through allowing actually and increase!
Attached drawing, photograph of nameplate of pneumatics machine motor is comparative
The electric machinery that LIUTECH pneumatics machine uses generally serves coefficient: 1.15
Industry kind the electric machinery that machine of other trademark pneumatics uses serves coefficient: 1.25
Industry kind the electric machinery that machine of other trademark pneumatics uses serves coefficient: 1.63
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