答：常見的羅茨風機的冷卻方式有以下幾種：

　　1、風冷

　　羅茨風機通過氣體的輸送和壓縮產生熱量，這些熱量需要從轉子傳遞到殼體進行散熱。但是，在低壓下，由于氣體的熱傳導和對流性能差，轉子吸收的熱量難以散發，轉子的溫度總是高于殼體的溫度。

　　轉子的熱膨脹會導致轉子與轉子之間、轉子與泵殼之間的間隙減小，尤其是壓差高時，可能會變得特別嚴重，導致轉子粘連，導致泵損壞。為了使羅茨泵在高差壓力下工作，擴大使用范圍，提高泵的可靠性，需要設法排出轉子產生的熱量，即冷卻轉子。

　　為了了解空氣冷卻的本質，讓我們來看看羅茨風機排氣側的氣體流動。在羅茨風機中，吸入氣體被壓縮的過程是不連續的、突然的。吸入氣體隨著轉子的旋轉而被封閉在腔室內，另外，隨著轉子的旋轉，腔室內的氣體突然與排氣口連接。

　　2、轉子內部冷卻

　　為了使羅茨風機在更高的壓力差下工作，可以采用循環油冷卻轉子，在泵軸的兩端分別安裝油孔、油徑軸頭進行打入，通過轉子內壁從另一端排出冷卻方法。冷卻油除了冷卻轉子外，還潤滑齒輪和軸承。該冷卻效果好，泵在運行時轉子溫度低于殼體溫度，大泵多采用這種方式。

　　3、轉子油膜冷卻

　　該冷卻方法是在羅茨風機的入口連接管路，用均勻滴下的冷卻油吸收轉子的熱量。機油經過過濾器、冷卻器，通過密閉的油泵，通過管線輸送到泵的入口。向轉子滴油后，隨著轉子的旋轉，在轉子表面變平。

　　它不僅可以吸收轉子的熱量，還可以在兩個轉子表面形成油膜，防止氣體倒流，奪走附著在轉子表面的細小灰塵。在泵出口設置油槽，收集廢油，過濾，冷卻后回收利用。

　　4、水冷

　　羅茨風機是指將中間級或二級泵吸入的空氣壓縮后，用與綜合吸收有相位差的組合消音器輸送。通過向泵內注入微量的水，可以去除壓縮空氣產生的熱量。吸入管安裝在單級或雙級泵單元的進氣端，與風機的進氣口連接。水由風機在真空下吸入，真空度越大，吸入水量越高。簡單調節閥應確保良好的吸入量，吸入水溫度應保持在20度左右.

　　我們瑞柘環保生產的羅茨風機多數采用風冷模式，沉水風機與水冷風機采用的是水冷模式生產!同時我們生產的羅茨泵也是一樣的哦！

How many cooling methods do you produce roots blower?

　　Answer: the common cooling methods of Roots blower are as follows:

　　1. Air cooling

　　Roots blower generates heat through gas transmission and compression, which needs to be transferred from rotor to shell for heat dissipation. However, at low pressure, due to the poor heat conduction and convection performance of the gas, the heat absorbed by the rotor is difficult to dissipate, and the temperature of the rotor is always higher than that of the shell.

　　The thermal expansion of the rotor will reduce the clearance between the rotor and the rotor and between the rotor and the pump shell. Especially when the differential pressure is high, it may become particularly serious, resulting in rotor adhesion and pump damage. In order to make roots pump work under high differential pressure, expand the scope of use and improve the reliability of the pump, it is necessary to try to discharge the heat generated by the rotor, that is, cool the rotor.

　　In order to understand the essence of air cooling, let's take a look at the gas flow on the exhaust side of Roots blower. In Roots blower, the compressed process of inhaled gas is discontinuous and sudden. The inhaled gas is enclosed in the chamber with the rotation of the rotor. In addition, with the rotation of the rotor, the gas in the chamber is suddenly connected with the exhaust port.

　　2. Rotor internal cooling

　　In order to make roots blower work under higher pressure difference, circulating oil can be used to cool the rotor, oil holes and oil diameter shaft heads can be installed at both ends of the pump shaft for driving, and the cooling method can be discharged from the other end through the inner wall of the rotor. In addition to cooling the rotor, the cooling oil also lubricates the gears and bearings. The cooling effect is good. When the pump is running, the rotor temperature is lower than the shell temperature. This method is mostly used for large pumps.

　　3. Rotor oil film cooling

　　The cooling method is to connect the pipeline at the inlet of Roots blower and absorb the heat of rotor with evenly dripping cooling oil. The oil is delivered to the inlet of the pump through the filter and cooler, through the closed oil pump and through the pipeline. After dropping oil to the rotor, it flattens on the rotor surface with the rotation of the rotor.

　　It can not only absorb the heat of the rotor, but also form an oil film on the surfaces of the two rotors to prevent gas backflow and take away the fine dust attached to the rotor surface. An oil tank is set at the pump outlet to collect waste oil, filter and recycle it after cooling.

　　4. Water cooling

　　Roots blower refers to compressing the air sucked in by the intermediate stage or secondary pump and conveying it with a combined silencer with phase difference from the comprehensive absorption. By injecting a small amount of water into the pump, the heat generated by compressed air can be removed. The suction pipe is installed at the air inlet end of the single-stage or two-stage pump unit and connected with the air inlet of the fan. Water is sucked by the fan under vacuum. The greater the vacuum, the higher the amount of water sucked. The simple regulating valve should ensure a good suction volume, and the suction water temperature should be maintained at about 20 degrees

　　Most roots fans produced by Ruizhe environmental protection adopt air-cooled mode, and submerged fans and water-cooled fans adopt water-cooled mode! At the same time, our roots pump is the same!