Regarding the calculation of the air compressor discharge flow, ask the master for the answer!! Rush

The exhaust volume and pressure of the compressor have little to do with the pipeline installed downstream of you (as long as it is greater than or equal to the diameter of the pipe required in the installation manual), his exhaust volume is how much compressed air is discharged per minute, after the pressure is set, all your pipes and equipment linked to the air compressor will become a whole, and the air compressor will ensure that the pressure of the compressed air running in this whole is the flow rate.

When the screw compressor is running, the minimum and maximum working pressure will be set, and when the set pressure is reached, it will unload and stop supplying air to the entire pipeline network system to ensure that the pressure and flow rate are constant.

If the pipe at the rear of the air compressor is installed too small, it will cause the compressor to exhaust poorly and damage the equipment.

It should be a 90 kilowatt machine, and you have a 4-inch tube that is already very thick, and if the tube is thick, you can understand that it is part of the pressure tank.

If there is no problem with the air compressor, the displacement should be kept at about cubic meters per minute, and the error will not be very large. And the pressure you mentioned, the size of the pipeline will not affect the displacement of the air compressor, but will affect the pumping time. The pressure is constant, the larger the pipeline, the longer the pressure air compressor pumping time, and vice versa.

The power should be 75kw, according to the rated exhaust pressure of your machine and the exhaust volume is different, and the transmission mode is also different (there are two kinds of belt and direct connection). The rated pressure is kilograms, and the scalar volume of the exhaust should be about 13 cubic meters.

The formula for the exhaust volume of the air compressor is q=v(p2-p1-1) t=2 (. The above formula ignores the influence of temperature awareness, if the gas temperature difference before and after filling is large, the temperature should be taken into account when calculating. For example, if the opening pressure of the machine pressure maintenance valve is 4kgf and the rated pressure is 10kgf, it is best to calculate the time consumed by the gas tank from p1 = to p2 = t=, and the volume of the air tank is v=2m3.

In general, the output pressure of the air compressor in the industry is at least MPa, and the pressure sent to the point of use of the equipment is at least MPa. This shows that we have guessed that the typical air compressor used is the unloading pressure of mpa(g) and the cylinder loading pressure of mpa(g) or system pressure.

The formula for gas flow is: flow velocity cross-sectional area, and the formula for gas flow rate corrected by temperature and pressure condition is: flow velocity cross-sectional area (pressure 10 1) (t 20) (t t).

Volume flow rate = cross-sectional area * flow velocity = cubic meters of seconds.

Mass flow = volume flow * density.

Pressure: the pressure of the gas at the current-carrying cross-section, mpa;

t: absolute temperature, t: actual temperature of the gas at the current-carrying cross-section.

q=dn*dn*v*（p1+1bar）/353

q is the standard flow rate; dn is the pipe diameter, such as DN65, DN80 and other direct input numbers, there is no need to convert to the inner diameter; v is the flow rate; p1 is the working pressure, and the unit is kilogram bar; The standard condition Qin socks Q flow rate is available, the working condition Q is easy to calculate, Q pb pm*q, pb is the standard atmospheric pressure, pm=pb+p1.

At present, in the domestic market, including imported brands, it can be said that the parameters displayed on the samples of all manufacturers are virtual, at least more than 10% high, do not believe you to test it with a flowmeter.

The main reasons are as follows.

1. Many manufacturers value the flow, and all manufacturers want to desperately reflect the energy saving of their air compressors, so they know that the flow rate cannot be reached, but they must also elevate, otherwise customers will feel that your flow parameters are so low on so many samples, who dares to buy it.

2. The use environment of many domestic factories and mines is poor or harsh, resulting in a good air compressor host can not be used for a long time, (because of high precision) but the rotor of the air compressor host with poor precision is not easy to bite, but the gas production does not come up.

3. The key is that the vicious competition in China's air compressor industry is fierce, especially the domestic brand air compressors are generally used by domestic poor hosts

If you think what I'm saying is wrong, you can jump out.

The flow rate of the air compressor is directly related to the power, exhaust pressure, motor speed, etc.

The formula for gas flow is: flow velocity cross-sectional area, and the formula for gas flow rate corrected by temperature and pressure condition is: flow velocity cross-sectional area (pressure 10 1) (t 20) (t t).

Volume flow rate = cross-sectional area * flow velocity = cubic meters of seconds.

Mass flow = volume flow * density.

Pressure: the pressure of the gas at the current-carrying cross-section, mpa;

t: absolute temperature, t: actual temperature of the gas at the current-carrying cross-section.

q=dn*dn*v*（p1+1bar）/353

q is the standard flow rate; dn is the pipe diameter, such as DN65, DN80 and other direct input numbers, there is no need to convert to the inner diameter; v is the flow rate; p1 is the working pressure, and the unit is kilogram bar; The standard condition Qin socks Q flow rate is available, the working condition Q is easy to calculate, Q pb pm*q, pb is the standard atmospheric pressure, pm=pb+p1.