As we know, roots blower and roots vacuum pump are similar in structure and principle. They both realize gas transmission and transfer through a pair of opposite rotating blade rotors. Can they be common to each other? Jingong will give you a brief talk.

此前錦工也做過(guò)一個(gè)主題為“羅茨風(fēng)機(jī)與羅茨鼓風(fēng)機(jī)是否一樣”的視頻。視頻中提到過(guò)羅茨鼓風(fēng)機(jī)與羅茨真空泵較明顯的區(qū)別就是羅茨鼓風(fēng)機(jī)用于正壓送風(fēng)，而羅茨真空泵則用于負(fù)壓抽吸。

Previously, Jingong also made a video with the theme of "whether roots blower is the same as roots blower". As mentioned in the video, the obvious difference between Roots blower and roots vacuum pump is that roots blower is used for positive pressure air supply, while roots vacuum pump is used for negative pressure suction.

負(fù)壓羅茨風(fēng)機(jī)能不能當(dāng)真空泵抽真空用？工作原理一樣嗎？

Can the negative pressure roots blower function be used as a vacuum pump? Does it work the same way?

羅茨真空泵又根據(jù)結(jié)構(gòu)與真空度的不同可分為偏向中高真空度的普通型羅茨真空泵與直排大氣型的粗真空羅茨真空泵。前者使用時(shí)需要配合前級(jí)泵使用，保證壓差在2KPa-10KPa以內(nèi),壓差過(guò)大會(huì)導(dǎo)致壓縮比增大、功率增加及熱脹，從而使電機(jī)過(guò)載或轉(zhuǎn)子熱脹抱死；而后者通過(guò)加大結(jié)構(gòu)間隙，同時(shí)配備氣冷或水冷，減少過(guò)大壓差引起的熱脹效應(yīng)，可以使設(shè)備適應(yīng)高達(dá)88KPa的壓差,也就是所謂的直排大氣，相應(yīng)的由于過(guò)大的間隙導(dǎo)致其真空度遠(yuǎn)不及前者。

Roots vacuum pump can be divided into ordinary roots vacuum pump with medium and high vacuum degree and coarse roots vacuum pump with direct discharge to the atmosphere according to different structure and vacuum degree. The former needs to be used with the front stage pump to ensure that the differential pressure is within 2kpa-10kpa. Excessive differential pressure will lead to the increase of compression ratio, power and thermal expansion, resulting in motor overload or rotor thermal expansion locking; The latter can reduce the thermal expansion effect caused by excessive differential pressure by increasing the structural gap and equipped with air cooling or water cooling at the same time, which can make the equipment adapt to the differential pressure up to 88kpa, that is, the so-called direct exhaust atmosphere. Correspondingly, the vacuum degree is far lower than the former due to excessive gap.

因此，一些臨時(shí)性的較低抽氣真空環(huán)境，羅茨鼓風(fēng)機(jī)可以代替羅茨真空泵使用（羅茨真空泵是進(jìn)口與系統(tǒng)連接，利用進(jìn)口對(duì)系統(tǒng)抽吸；羅茨鼓風(fēng)機(jī)是排氣口與系統(tǒng)連接，利用排氣口送風(fēng)給系統(tǒng)）。但也于粗真空環(huán)境，無(wú)法應(yīng)用于真空度或其他要求過(guò)高的場(chǎng)合。

Therefore, roots blower can be used instead of Roots vacuum pump in some temporary low extraction vacuum environment (roots vacuum pump is connected with the system through the inlet and uses the inlet to suck the system; roots blower is connected with the system through the exhaust port and uses the exhaust port to supply air to the system). However, it is only limited to coarse vacuum environment and cannot be applied to occasions with high vacuum degree or other requirements.

但反過(guò)來(lái)，實(shí)際應(yīng)用上不會(huì)有人愿意拿羅茨真空泵來(lái)替代羅茨鼓風(fēng)機(jī)，一方面由于性價(jià)比上出入太大，羅茨真空泵的要遠(yuǎn)高于羅茨鼓風(fēng)機(jī)；另一方面普通型羅茨真空泵如前面所述需要配合前級(jí)泵使用，無(wú)法在常壓下啟動(dòng)，使用也就無(wú)從談起。

On the contrary, in practical application, no one is willing to replace roots blower with roots vacuum pump. On the one hand, due to the large difference in cost performance, the price of Roots vacuum pump is much higher than that of Roots blower; On the other hand, as mentioned above, the ordinary roots vacuum pump needs to be used with the front stage pump. It cannot be started under normal pressure, so it is impossible to use it.

今日就是小編為大家?guī)?lái)的精彩內(nèi)容，更多的精彩內(nèi)容關(guān)注我們的網(wǎng)站：羅茨風(fēng)機(jī)http://lzdbgs.com.cn

Today is the wonderful content that Xiaobian brings to you. More wonderful content focuses on our website: Roots blower http://lzdbgs.com.cn