公开(公告)号：US4135854A

公开(公告)日：1979-01-23

申请号：US751404

申请日：1976-12-16

申请人： Morton H. Binstock ,  Bertram H. Stern

发明人： Morton H. Binstock ,  Bertram H. Stern

IPC分类号： F04D27/00 ,  F04D27/02 ,  F04D29/36 ,  F23L5/00 ,  F23L17/16

CPC分类号： F04D29/362 ,  F04D27/002

摘要： The disclosed system detects the pressure rise across the fan and the flow rate in the system and integrates signals corresponding thereto, and outputs a signal to indicate to the user when the pressure rise exceeds a given level for a corresponding flow rate to warn of a condition within a given degree of a stall condition. The system outputs another signal to block any increase in fan blade pitch and substitutes a decrease pitch signal in response to a predetermined closer approach to a stall condition so that the pitch of the blades is reduced to a position in which the pressure rate rise and flow rate are reduced to a safe level with respect to a stall condition. The system also includes means responsive to the predetermined closer approach to stall to prevent the user from feeding a blade pitch increase signal following a reduction in the pressure rise across the fan until the user resets a bistable device.

摘要翻译： 所公开的系统检测风扇上的压力升高和系统中的流量，并对与之对应的信号进行积分，并且输出信号以向用户指示当压力上升超过给定水平时，对于相应的流量来警告状况 在给定的档位条件下。 该系统输出另一信号以阻止风扇叶片间距的任何增加，并且响应于预定的接近失速状态而代替减小音调信号，使得叶片的桨距减小到压力升高和流动的位置 速率相对于失速状况降低到安全水平。 该系统还包括响应于预定的更接近的失速方式的装置，以防止用户在跨过风扇的压力降低减小直到用户复位双稳态装置之后进给叶片俯仰增加信号。