液壓升降機中的液壓油是設備最重要的傳輸介質，對于粘度的要求我們在日常生活或多或少的有過了解，但是相信很多人并不非常熟悉，下面濟南榮凱升降機械的有關專家就給大家詳細介紹一下。

1、為使液壓升降機系統能發揮出最高效率，油液的粘度通常為25—79mmz／s。由于升降機采用齒輪油泵，該泵對液壓油的粘度較為敏感，因而對粘度的選擇要以原車推薦用油的粘度等級為準，以保證整車性能。另外，粘度隨壓力增加而上升(大約壓力增加油4Mpa，粘度升lO％)，但這在液壓升降機中不必考慮。
For the hydraulic lift system to play the highest efficiency, the viscosity of the oil is usually 25-79mmz / s. Due to the use of gear pumps lift the pump hydraulic oil viscosity is more sensitive, and thus the viscosity of the original car to select the recommended oil viscosity grades prevail to ensure that vehicle performance. In addition, the viscosity increases with pressure rise (about pressure increase oil 4Mpa, viscosity l lO%), but this does not have to be considered in the hydraulic lift.

2、液壓升降機對粘度指數的要求：粘度指靈敏與粘度的概念不同，液壓升降機液體阻止由溫度變化而引起粘度變化的能力。該值越高，油液的粘度隨溫度變化越小，適應的溫度范圍越大。由于修船行業季節性強，冬季用車量較少，因而應考慮對升降平臺部分車輛選用冬夏兩季不進行換油的液壓油。為此，對粘度指靈敏的要求，南方區域最好選用95以上，渤海區域船廠應選用粘度指數在100以上的液壓油，這樣可有較寬的適用溫度范圍和較好的經濟性。
Hydraulic lifts viscosity index requirements: viscosity index and viscosity sensitive different concepts, hydraulic lifts liquid-blocking ability caused by temperature changes the viscosity change. The higher the value, the smaller the viscosity of the fluid varies with temperature, the greater the adaptation temperature range. Ship repair industry due to seasonal, less the amount of winter car, and thus should be considered part of the lift platform selection of winter and summer vehicle oil changes without hydraulic oil. For this reason, the requirements for viscosity index sensitive southern region the best selection of 95 or more, the Bohai shipyard area viscosity index should be used in more than 100 hydraulic oil, which can have a wide temperature range and a better economy.