当我们听到重庆升降平台有噪音时，第一先要检查阀门、马达、液压泵、固定安装等方面的因素导致噪音产生。When we hear the noise of the Hangzhou landing platform, the first to check the valve, motor, hydraulic pump, fixed installation and other aspects of the factors leading to noise generation.

如果在更换液压油的时候，因为操作的不谨慎，会导致液压缸中进入空气，使液压缸产生噪音。使用新的密封圈或者密封过紧，也会产生大的噪音，不过磨合一段时间就没有问题了。If the replacement of hydraulic oil, because the operation is not careful, will lead to the hydraulic cylinder into the air, so that the hydraulic cylinder noise. Use a new sealing ring or seal tight, will also have a big noise, but in a period of time there is no problem. 

液压油不足时，液压泵产生吸空，将空气吸入到液压油中，这样也会导致重庆升降平台高噪音的产生。When the hydraulic oil is not enough, the hydraulic pump will be sucked out, and the air will be sucked into the hydraulic oil, which will lead to the generation of the high noise of the lifting platform in Hangzhou. 

液压油吸入空气或者溢流阀卡住，或液压升降机磨损比较严重时，会引起溢流阀调压不稳以及卸压时间太短等问题，这些问题间接导致溢流阀先导阀性能不稳，导致噪音产生。Hydraulic oil or air relief valve stuck, or hydraulic lift more serious wear, will cause the pressure relief valve adjustment is not steady and the unloading time is too short and other issues, these problems lead to indirect pilot valve relief valve performance instability, resulting in noise.