液压升降机中的液压油是设备最重要的传输介质，对于粘度的要求我们在日常生活或多或少的有过了解，但是相信很多人并不非常熟悉，下面济南荣凯升降机械的有关专家就给大家详细介绍一下。

1、为使液压升降机系统能发挥出最高效率，油液的粘度通常为25—79mmz／s。由于升降机采用齿轮油泵，该泵对液压油的粘度较为敏感，因而对粘度的选择要以原车推荐用油的粘度等级为准，以保证整车性能。另外，粘度随压力增加而上升(大约压力增加油4Mpa，粘度升lO％)，但这在液压升降机中不必考虑。
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、液压升降机对粘度指数的要求：粘度指灵敏与粘度的概念不同，液压升降机液体阻止由温度变化而引起粘度变化的能力。该值越高，油液的粘度随温度变化越小，适应的温度范围越大。由于修船行业季节性强，冬季用车量较少，因而应考虑对升降平台部分车辆选用冬夏两季不进行换油的液压油。为此，对粘度指灵敏的要求，南方区域最好选用95以上，渤海区域船厂应选用粘度指数在100以上的液压油，这样可有较宽的适用温度范围和较好的经济性。
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.