公开(公告)号：US3736751A

公开(公告)日：1973-06-05

申请号：US3736751D

申请日：1971-05-26

申请人： SECR DEFENCE

发明人： RODNEY J ,  FULLER D

IPC分类号： F01D11/18 ,  F16J15/44 ,  F02C7/28 ,  F16J15/40

CPC分类号： F01D11/18 ,  F16J15/44 ,  Y10S277/931

摘要： In order to maintain a substantially constant clearance between static and rotating sealing elements of a gas turbine engine, one of the elements is connected to a thermally expansible control tube which is fed with hot gas from the engine in direct proportion to the size of the sealing clearance e.g. by using fluid which has leaked through the seal. The control tube is additionally fed with cold air and vented to a low pressure via a restrictor. When the seal clearance is set to the desired value the pressures of hot and cold fluid are such that there is no flow along the control tube. Enlargement of the clearance gives an increase in pressure to the hot fluid which flows along the tube heating the tube and the resulting expansion reduces the sealing clearance. Reduction in sealing clearance reduces the pressure of the hot fluid so that the colder fluid flows along the tube and the resulting contraction enlarges the sealing clearance.

摘要翻译： 为了在燃气涡轮发动机的静态和旋转的密封元件之间保持基本恒定的间隙，元件之一连接到热膨胀的控制管，热管可以与来自发动机的热气直接比例地与密封件 清除例如 通过使用已经通过密封件泄漏的流体。 控制管另外供给冷空气，并通过限流器排放到低压。