空壓機(jī)頻繁加卸載原因及故障分析

部分用戶在使用空壓機(jī)的過程中經(jīng)常會(huì)遇到空壓機(jī)加卸載頻繁這種狀況，而出現(xiàn)這種情況的原因主要有以下幾類：

Some users often encounter frequent loading and unloading of air compressor in the process of using air compressor, and the main reasons for this situation are as follows:

1、供氣壓力和卸載壓力設(shè)定的數(shù)值過于接近

1. The set values of air supply pressure and unloading pressure are too close

當(dāng)空壓機(jī)達(dá)到供氣壓力時(shí)，若用氣量突然減小，變頻器來不及控制電機(jī)減速，就會(huì)造成產(chǎn)氣量過大，從而造成卸載的情況。

When the air compressor reaches the air supply pressure, if the air consumption suddenly decreases and the frequency converter has no time to control the motor deceleration, it will cause excessive gas production and unloading.

解決方法：將供氣壓力和卸載壓力之間的差值設(shè)的大些，通常差值≥0.05MPa

Solution: set the difference between gas supply pressure and unloading pressure larger, usually the difference is greater than or equal to 0.05Mpa

2、當(dāng)電機(jī)恒定頻率運(yùn)行時(shí)，面板顯示壓力上下波動(dòng)

2. When the motor runs at a constant frequency, the panel shows that the pressure fluctuates up and down

解決方法：換一個(gè)壓力傳感器。

Solution: change a pressure sensor.

3、用戶用氣量不穩(wěn)定

3. Unstable gas consumption

用戶用氣量不穩(wěn)定，會(huì)突然增加減少很大的用氣量。此時(shí)供氣壓力就會(huì)出現(xiàn)變動(dòng)，變頻器控制電機(jī)變頻改變輸出氣量來維持供氣壓力穩(wěn)定。但是電機(jī)的轉(zhuǎn)速變化都是有速度的，當(dāng)這個(gè)速度跟不上用氣端的用氣變化速度時(shí)就會(huì)造成機(jī)器的壓力波動(dòng)，然后可能會(huì)出現(xiàn)加卸載的情況。

The user's gas consumption is unstable, which will suddenly increase and reduce a lot of gas consumption. At this time, the air supply pressure will change, and the frequency converter controls the motor to change the output air volume to maintain the stable air supply pressure. But the change of motor speed has speed. When this speed can't keep up with the change speed of gas end, it will cause the pressure fluctuation of the machine, and then loading and unloading may occur.

解決方法：避免突然使用多臺(tái)用氣設(shè)備，可以一臺(tái)一臺(tái)的開啟用氣的設(shè)備。（2）將變頻器的變頻速度調(diào)快，讓輸出氣量的改變速度增快來適應(yīng)用氣量的變化。（3）用大容量的儲(chǔ)氣罐來緩沖。

Solution: avoid the sudden use of multiple gas equipment, you can turn on the gas equipment one by one. (2) Adjust the frequency conversion speed of frequency converter to make the change speed of output gas increase to adapt to the change of gas consumption. (3) Buffer with a large capacity air tank.

4、用戶用氣量過小

4. The gas consumption of users is too small

通常變頻空壓機(jī)的變頻范圍為30%~100%，異步變頻空壓機(jī)的變頻范圍為50%~100%。當(dāng)用戶用氣量小于壓縮機(jī)下限輸出氣量時(shí)，氣量達(dá)到設(shè)定的供氣壓力以后，這時(shí)候變頻器會(huì)控制電機(jī)降頻至下限頻率以下限輸出氣量來輸出壓縮氣體，但是因?yàn)橛脷饬刻?，供氣壓力就?huì)繼續(xù)升高，直到卸載壓力，機(jī)器卸載。然后供氣壓力下降，壓力下降至低于加載壓力時(shí)，機(jī)器重新加載。

Generally, the frequency range of variable frequency air compressor is 30% ~ 100%, and the frequency range of asynchronous variable frequency air compressor is 50% ~ 100%. When the user's gas consumption is less than the lower limit output gas of the compressor, and the gas volume reaches the set gas supply pressure, the frequency converter will control the motor to reduce the frequency below the lower limit frequency and limit the output gas volume to output compressed gas. However, because the gas consumption is too small, the gas supply pressure will continue to rise until the unloading pressure and the machine unloading. Then the air supply pressure drops, and when the pressure drops below the loading pressure, the machine reloads.

對(duì)這種情況做一個(gè)分析。就是當(dāng)用氣量很小機(jī)器卸載時(shí)，該不該讓壓縮機(jī)進(jìn)入休眠狀態(tài)，或者說卸載多少時(shí)間以后再進(jìn)入休眠狀態(tài)。當(dāng)機(jī)器卸載時(shí)，用氣端也是在用氣的，但是一旦壓縮機(jī)進(jìn)入休眠狀態(tài)以后，壓縮機(jī)不在產(chǎn)生用氣，這時(shí)候供氣壓力會(huì)下降，下降至加載壓力后，機(jī)器加載。

Make an analysis of this situation. That is, when the gas consumption is very small, when the machine is unloaded, should the compressor enter the sleep state, or how much time after unloading to enter the sleep state. When the machine is unloaded, the gas end is also using gas, but once the compressor enters the sleep state, the compressor will no longer produce gas. At this time, the gas supply pressure will drop. When it drops to the loading pressure, the machine will load.

這里會(huì)出現(xiàn)一種情況，就是當(dāng)機(jī)器從休眠狀態(tài)開始重新啟動(dòng)時(shí)，用戶的壓力還在下降，很可能會(huì)出現(xiàn)供氣壓力低于加載壓力，甚至遠(yuǎn)低于加載壓力的情況，造成供氣壓力過低或者供氣壓力波動(dòng)大的情形。所以建議卸載后進(jìn)入休眠狀態(tài)的時(shí)間不宜過短。

There will be a situation here, that is, when the machine starts to restart from the sleep state, the user's pressure is still falling. It is very likely that the air supply pressure is lower than the loading pressure, or even far lower than the loading pressure, resulting in the situation that the air supply pressure is too low or the air supply pressure fluctuates greatly. Therefore, it is suggested that the time to enter the sleep state after unloading should not be too short.