答：近些年來，國內的真空技術獲得快速發展，已變為一門單獨的基礎學科。很多行業的飛速發展如航宇科學合理、真空表層的鍍膜、真空冶煉廠、等離子體物理、可控熱核反應、表層科學研究等**科學都和真空技術性的進度擁有同時的甚至是相互依存的關聯。真空用油做為各種機械設備真空泵專用型潤滑脂，在真空泵內肩負著潤化、密封性、降溫等的作用。盡管機械設備真空泵擁有不一樣的種類，但油品務必具備合適的粘度、優良的油水分離器性、優質的熱安定性和氧化安定性、盡量低飽和蒸氣壓，由于油品品質直接關系真空機器設備很有可能做到的限制工作壓力、抽真空速度、背壓式和返油率等。近些年，伴隨著真空技術發展，機械設備真空泵向快速高效率、低噪聲、微型化發展趨勢。泵腔內摩擦副表層角速度擴大，油溫高，因此機械設備真空泵油趨于低粘度化，標準在泵操作溫度下維持較低飽和蒸汽壓。依據油品使用情況下的運行狀態，真空用油可分成機械設備真空用油、蒸氣噴射泵油、真空機械設備用潤滑油和真空密封油等。

　　因為羅茨泵需求真空度很高，一般用石臘基窄減壓渣油潤滑油，針對羅茨真空泵，還可以應用蒸氣壓很低甲基硅油或別的合成潤滑油。羅茨真空泵腔具體內容積隨時變化而生成排氣管功效，這需求羅茨真空泵潤滑油應具備適合自己的黏度和粘溫特點。

　　羅茨真空泵持續向高速運行發展趨勢，因為轉子和泵殼的快速磨擦使油溫高，成品油非常容易空氣氧化，特別是在羅茨增壓水泵通常處在很高的環境溫度自然環境下工作中，使系統軟件內蒸氣壓上升，真空度減少，因而需求羅茨泵潤滑油具備優良的熱氧化安定性。

　　真空泵油粘度是充分發揮真空泵特性的關鍵因素之一，液態的粘度是液態流動阻力，或者是是溶液的內滑動摩擦力，因而粘度越多，各種運動構件受到的阻礙就越大;但粘度過小，泵的密封性特性下降，造成氣體泄漏，真空變劣。因而，各種真空泵對油品粘度的挑選極其重要。

　　1.泵油品粘度挑選標準

　　(1)泵的轉速比越大，泵的電機轉子健身運動角速度越多，挑選油品的粘度越低;

　　(2)泵組件的加工精度越精或磨擦件中間的空隙越小，挑選油品的粘度越低;

　　(3)真空泵在持續高溫工作狀況使用中，挑選油品的粘度以大幅宜;

　　(4)有冷卻循環水循環系統的真空泵，一般選用粘度較低油品;

　　(5)冬季與夏季常用真空泵油，應相距一個粘度級別。

　　2.各種真空泵用油粘度范疇的挑選

　　根據上述標準，真空泵用油粘度范疇的選用強烈推薦如下所示：

　　(1)活塞機真空泵(W型)一般選用HVI100、HVI150中性化油就可以。

　　(2)旋內置式真空泵(2X型)選用V68、V100粘度級別油品。

　　(3)直連(快速)旋內置式真空泵(2XZ型)選用V46、V68粘度級別油品。

　　(4)旋片泵式真空泵(H型)選用V68、V100粘度級別油品。

　　(5)余旋輪線真空泵(YZ、YZR型)選用V100、V150粘度級別油品。

　　(6)羅次真空泵(機械設備增壓水泵)傳動齒輪系統軟件的潤化，可選用V32、V46粘度級別真空泵油品。

　　(7)其他類型的真空泵，可依據其轉速比、加工精度、極限值真空等，選用相對應的油品。

　　此外,務必到靠譜生產廠家購買油品，因某些生產商在生產制造真空泵油時，不經過水蒸氣蒸餾激光切割，立即應用基礎油價格，加上一般抗氧化劑后，做為商品銷售，其傷害取決于：

　　(1)該商品在一定程度上盡管還可以做為真空泵油應用，但應用情況下，會大大的增加抽真空時長;

　　(2)一般抗氧化劑在高溫天氣中非常容易氧化分解，形成酸性物質，造成臭味，環境污染,與此同時,油品也非常容易空氣氧化質變，應用周期時間減少;

　　(3)極限值氣體壓強和飽和蒸氣壓達不上產品質量標準，危害真空泵的極限值真空度。

　　機械設備真空泵油是通過深層特制、真空除氣或分子蒸餾、沒有質輕成分的商品，在使用時務必留意以下事情：

　　(1)油品的儲放。裝油的器皿務必清理整潔，禁止在太陽底下曝曬和室外儲放，要儲放在昏暗、干躁和氣溫較低場地，堅決杜絕水份和機械設備殘渣灰塵滲入。

　　(2)取油或裝油時，密封蓋周邊的灰塵務必除掉，避免雜質滲入油中，造成泵磨擦。

　　(3)不一樣型號、種類及其新老真空泵油不可混合使用。

　　(4)真空泵油嚴苛防止和別的石油產品混和，尤其是質輕油品，不然將危害泵的真空特性。

　　(5)真空泵盡量減少抽除**溶劑、水蒸汽和有腐蝕汽體等，當一定抽除這種汽體時，需采用必需的防范措施，還需要勤查驗、勤換機油，尤其當油品乳狀液或溶解到危害泵的密封性特性時，務必獲得新油。

　　(6)換機油時需要將舊油排清，將新油從泵的呼吸口倒進，并且用手緩慢地旋轉泵軸，清理泵腔并列盡動植物油，再反復高壓清洗泵腔多次，隨后將泵體里的動植物油清洗，裝進新油。

　　(7)泵維修時一定用**溶劑或清潔劑將泵的各構件清洗干凈，并把構件烘干處理。拼裝時各構件務必預浸一個新的真空泵油后能夠組成，拼裝結束完用新油再清洗一次，隨后裝進新油。

　　(8)給油用品必須是專業設備，不可以是盛過別的油品或溶液的罐體。

　　(9)針對處在強腐蝕性氛圍或清靜度需求極強的真空泵，依據機器設備規定可選用合氟甲基丙烯酸酯油。

　　羅茨真空泵吸進的假如是腐蝕汽體，會與油產生化學變化，浸蝕泵內零件。吸進空氣中通常帶有水蒸氣凝結水，造成羅茨真空泵潤滑油的乳狀液并使電化學腐蝕，因此需要具備優良的耐腐蝕和抗破乳性。如果您也有疑惑，可以聯系我們的在線客服咨詢。

　　A: in recent years, domestic vacuum technology has developed rapidly and has become a separate basic discipline. The rapid development of many industries, such as aerospace science and rationality, vacuum surface coating, vacuum smelter, plasma physics, controllable thermonuclear reaction, surface science research and other cutting-edge Sciences, has a simultaneous or even interdependent relationship with the progress of vacuum technology. Vacuum oil, as a special grease for vacuum pumps of various mechanical equipment, plays the role of lubrication, sealing and cooling in the vacuum pump. Although mechanical equipment vacuum pumps have different types, oil products must have appropriate viscosity, excellent oil-water separability, high-quality thermal stability and oxidation stability, and try to lower the saturated vapor pressure. Because the quality of oil products is directly related to the limiting working pressure, vacuum pumping speed, back pressure type and oil return rate that vacuum machinery and equipment are likely to do. In recent years, with the development of vacuum technology, mechanical equipment vacuum pump is developing towards fast, high efficiency, low noise and miniaturization. The surface angular velocity of the friction pair in the pump cavity is expanded, and the oil temperature is high, so the vacuum pump oil of mechanical equipment tends to be low viscosity, and the standard is to maintain a low saturated vapor pressure at the pump operating temperature. According to the operating state of oil products, vacuum oil can be divided into vacuum oil for mechanical equipment, steam jet pump oil, lubricating oil for vacuum mechanical equipment and vacuum sealing oil.

　　Because Roots pumps require a high degree of vacuum, they usually use Shi lachi narrow vacuum residue lubricant. For Roots vacuum pumps, methyl silicone oil with very low vapor pressure or other synthetic lubricants can also be used. The specific internal volume of Roots vacuum pump chamber changes at any time to generate exhaust pipe effect, which requires that roots vacuum pump lubricating oil should have its own viscosity and viscosity temperature characteristics.

　　Roots vacuum pump continues to develop towards high-speed operation, because the rapid friction between the rotor and the pump shell makes the oil temperature high, and the product oil is very easy to be oxidized by air, especially in the natural environment where roots booster pump is usually at high ambient temperature, which increases the vapor pressure in the system software and reduces the vacuum degree. Therefore, roots pump lubricating oil is required to have excellent thermal oxidation stability.

　　The viscosity of vacuum pump oil is one of the key factors to give full play to the characteristics of vacuum pump. The viscosity of liquid is the liquid flow resistance, or the internal sliding friction of solution. Therefore, the more viscosity, the greater the obstruction of various moving components; However, if the viscosity is too small, the sealing characteristics of the pump will decline, causing gas leakage and vacuum deterioration. Therefore, various vacuum pumps are extremely important for the selection of oil viscosity.

　　1. Selection standard of pump oil viscosity

　　(1) The higher the speed ratio of the pump, the more the angular speed of the motor rotor of the pump, and the lower the viscosity of the selected oil;

　　(2) The more precise the processing accuracy of the pump components or the smaller the gap between the friction parts, the lower the viscosity of the selected oil;

　　(3) When the vacuum pump is used under continuous high-temperature working conditions, the viscosity of the oil should be selected to be large;

　　(4) Vacuum pumps with cooling circulating water circulation system generally use oil with low viscosity;

　　(5) Vacuum pump oil commonly used in winter and summer should be separated by a viscosity level.

　　2. Selection of viscosity categories of various vacuum pump oils

　　According to the above standards, the selection of oil viscosity for vacuum pump is strongly recommended as follows:

　　(1) Generally, hvi100 and hvi150 neutralized oil are used for piston machine vacuum pump (W type).

　　(2) The built-in vacuum pump (2x type) adopts v68 and V100 viscosity grade oil.

　　(3) V46 and v68 viscosity grade oil products are selected for direct (fast) rotary built-in vacuum pump (2XZ type).

　　(4) The vane pump vacuum pump (H type) adopts v68 and V100 viscosity grade oil.

　　(5) V100 and V150 viscosity grade oil products are selected for the vacuum pumps of the co rotating wheel line (YZ and YZR types).

　　(6) For the lubrication of the transmission gear system software of the Luoci vacuum pump (booster pump of mechanical equipment), V32 and v46 viscosity vacuum pump oil can be selected.

　　(7) For other types of vacuum pumps, the corresponding oil products can be selected according to their speed ratio, processing accuracy, limit value vacuum, etc.

　　In addition, be sure to buy oil from reliable manufacturers, because some manufacturers do not undergo steam distillation and laser cutting when producing vacuum pump oil, and immediately apply the price of base oil, plus general antioxidants, as a commodity for sale, the damage depends on:

　　(1) Although this product can also be used as vacuum pump oil to a certain extent, it will greatly increase the vacuum pumping time under application conditions;

　　(2) Generally, antioxidants are very easy to oxidize and decompose in high temperature weather, forming acidic substances, causing odor and environmental pollution. At the same time, oil products are also very easy to oxidize and change in quality, reducing the application cycle time;

　　(3) The limit value gas pressure and saturated vapor pressure cannot meet the product quality standard, endangering the limit value vacuum degree of the vacuum pump.

　　Vacuum pump oil of mechanical equipment is a commodity without light components through deep special, vacuum degassing or molecular distillation. Please pay attention to the following things when using it:

　　(1) Storage of oil products. The containers containing oil must be cleaned and tidy. It is forbidden to expose them to the sun and store them outdoors. They should be stored in dark, dry and low temperature places, and resolutely put an end to the infiltration of moisture and mechanical equipment residues and dust.

　　(2) When taking or loading oil, the dust around the sealing cover must be removed to prevent impurities from penetrating into the oil and causing pump friction.

　　(3) Different models, types and new and old vacuum pump oils cannot be mixed.

　　(4) Vacuum pump oil is strictly prevented from mixing with other petroleum products, especially light oil products, otherwise it will endanger the vacuum characteristics of the pump.

　　(5) The vacuum pump shall try to reduce the pumping of organic solvents, water vapor and corrosive vapor. When such vapor must be pumped out, necessary preventive measures shall be taken, and the oil shall be checked and changed frequently, especially when the oil emulsion is dissolved or endangers the sealing characteristics of the pump, new oil must be obtained.

　　(6) When changing the engine oil, it is necessary to drain the old oil, pour the new oil into the breathing port of the pump, slowly rotate the pump shaft by hand, clean the pump cavity and drain the animal and vegetable oil, and then repeatedly clean the pump cavity with high pressure for many times, and then clean the animal and vegetable oil in the pump body and fill it with new oil.

　　(7) When repairing the pump, be sure to clean all components of the pump with organic solvent or detergent, and dry the components. During assembly, all components must be pre soaked with a new vacuum pump oil to form. After assembly, clean them with new oil again, and then install new oil.

　　(8) The oil supplies must be professional equipment, and cannot be tanks that contain other oil products or solutions.

　　(9) For vacuum pumps in strong corrosive atmosphere or with strong demand for cleanliness, fluoromethacrylate oil can be selected according to the regulations of machinery and equipment.

　　If the corrosive vapor sucked by roots vacuum pump will produce chemical changes with oil and erode the parts in the pump. There is usually water vapor condensate in the air, which causes the emulsion of Roots vacuum pump lubricating oil and electrochemical corrosion. Therefore, it is necessary to have excellent corrosion resistance and demulsification resistance. If you also have doubts, you can contact our online customer service consultation.