公开(公告)号：WO2015020851A1

公开(公告)日：2015-02-12

申请号：PCT/US2014/048817

申请日：2014-07-30

Applicant: INGERSOLL-RAND COMPANY

Inventor： CODD, Paul M.

IPC: B66D1/56 ,  B66D5/24 ,  B66D1/48

CPC classification number: B66D1/56 ,  B66D1/08 ,  B66D1/48 ,  B66D5/24 ,  B66D5/26

Abstract: A hoist system includes a winch drum and an air motor coupled to the winch drum. The hoist system further includes a brake coupled to the winch drum and operable to stop rotation of the winch drum and an over-speed sensing device configured to sense a speed of the winch drum. The over-speed sensing device includes a pneumatic switch operable to disconnect an air supply from the air motor and engage the brake to stop rotation of the winch drum and a centrifugal clutch coupled to the winch drum and configured to rotate at a rotational speed proportional to the speed of the winch drum. The centrifugal clutch operates the pneumatic switch when the rotational speed of the centrifugal clutch reaches or exceeds a threshold rotational speed.

Abstract translation: 提升系统包括绞盘鼓和联接到绞盘鼓的空气马达。 提升系统还包括联接到绞盘鼓的制动器，其可操作以停止绞盘鼓的转动;以及超速感测装置，其配置成感测绞盘鼓的速度。 超速感测装置包括气动开关，其可操作以从空气马达断开空气供应并接合制动器以停止绞盘鼓的旋转;以及耦合到绞盘鼓的离心式离合器，并配置成以与 绞车鼓的速度。 当离心式离合器的转速达到或超过阈值转速时，离心式离合器操作气动开关。