卷揚啟閉機要良好的運行，需要一些制動輔助裝置，例如負荷限制器，可能不少的人對于卷揚啟閉機的負荷限制器了解較少，下面我們就一起來了解卷揚啟閉機的負荷限制器。
To operate the winch hoist well, some braking auxiliary devices, such as load limiters, are required. Many people may not have a good understanding of the load limiters of the winch hoist. Let's take a look at the load limiters of the winch hoist together.
由于啟閉機的操作對象是非自由懸吊的，很多意外因素都能引起危險的過載，所以負荷限制器在啟閉機上是一個重要的輔助裝置。在QPK系列啟閉機上，當啟閉力超過250kN必纖維 驅鳥設備 保定通風管道 塑料土工格柵 檢查井模具 流水槽模具 鍛造廠家 華爾街銅牛須配備負荷限制器．
Due to the non free suspension of the operating object of the hoist, many unexpected factors can cause dangerous overloads, so the load limiter is an important auxiliary device on the hoist. On QPK series hoists, load limiters must be equipped when the lifting force exceeds 250kN
當負荷超過額定數值的10％一20％時，啟閉機的起升機構應能自動切斷主回路的電源，在現行的QPK系列中超載采用20％的數值。有的啟閉機當下放閘門卡在半空時，負荷小于一定數值，也能自動切斷主回路電源。
When the load exceeds 10% -20% of the rated value, the lifting mechanism of the hoist should be able to automatically cut off the power supply of the main circuit. In the current QPK series, a 20% overload value is used. Some hoists can automatically cut off the main circuit power supply when the current release door is stuck in mid air and the load is less than a certain value.
卷揚啟閉機廠家解析：負荷限制器通常都是以啟閉機的滑輪組的平衡滑輪作為受力元件，故啟閉機雙聯滑輪組的倍率都是取偶數的．
Analysis of the manufacturer of the winch hoist: The load limiter usually uses the balance pulley of the hoist's pulley block as the load-bearing component, so the magnification of the dual pulley block of the hoist is even
負荷限制器按測力元件的不同分為機械式負荷限制器和電氣式負荷限制器
Load limiters are divided into mechanical load limiters and electrical load limiters according to the different force measuring components