公开(公告)号：US5636659A

公开(公告)日：1997-06-10

申请号：US544348

申请日：1995-10-17

申请人： Jan P. Smed

发明人： Jan P. Smed

IPC分类号： F01D9/02 ,  F01D5/08 ,  F01D25/12 ,  F02C7/18 ,  F16K15/06 ,  F16K15/00

CPC分类号： F02C7/18 ,  F01D25/12 ,  F01D5/081 ,  F16K15/063 ,  Y02T50/676 ,  Y10T137/7934 ,  Y10T137/7935

摘要： A variable area restrictor is disclosed that is preferably used in a turbine engine to provide improved matching between the pressure required for aerofoil cooling and the somewhat lower pressure requirement for supplying air to the interstage seals and disc cavities. In a preferred embodiment, the valve of the present invention comprises a spring loaded valve assembly with a fixed minimum flow area controlled by pre-setting a minimum dimension for the opening between an inlet and the housing or body of the valve. A pre-loaded spring maintains the lift at this minimum dimension until the pressure drop across the flow area exceeds a certain value. Above this critical pressure drop, the valve lifts, causing the flow area to increase, and thereby reducing the supply pressure that would be otherwise necessary to achieve a disc cavity flow adequate to maintain the temperatures within specifications.

摘要翻译： 公开了一种可变区域限制器，其优选地用于涡轮发动机中，以提供机翼冷却所需的压力与向层间密封件和盘腔供应空气的稍低的压力要求之间的改进的匹配。 在优选实施例中，本发明的阀包括弹簧加载的阀组件，其具有通过预先设定入口与阀的壳体或主体之间的开口的最小尺寸来控制的固定的最小流动面积。 预加载的弹簧将升力保持在该最小尺寸，直到流动区域上的压降超过一定值。 高于该临界压降时，阀升高，导致流动面积增加，从而降低为了实现足以将温度保持在规格内的盘腔流动所必需的供应压力。