Internal air system
压气机向前的载荷
封严件向 前的载荷
涡轮向后的载荷
增大面积导致 增大向前的载荷
定位轴承 压力平衡封严件
Fig. 9-8 Control of axial bearing load.
bled from the compressor. It is desirable to bleed the air as early as possible from the compressor to minimize the effect on engine performance. However, during some phases of the flight cycle it may be necessary to switch the bleed source to a later compressor stage to maintain adequate pressure and temperature.
内部空气
图9-8 轴承轴向载荷的控制
upon a fixed diameter pressure balance seal to ensure the location bearing is adequately loaded throughout the engine thrust range. AIRCRAFT SERVICES 26. To provide cabin pressurization, airframe antiicing and cabin heat, substantial quantities of air are
轴承载荷控制
25.发动机轴承受交变的轴向燃气载荷(第20 章),在压气机中是向前的,在涡轮上是向后 的。压气机与涡轮之间的轴便经常处于拉伸应 力之下,载荷之间的差额则由装在静止机匣上 的定位轴承(又称止推轴承)承受(图9-8)。内部 空气的压力作用在一个固定直径的压力平衡封 严件上,以保证在整个发动机推力范围内,定 位轴承承受的载荷是适当的。
飞机服务
26.为了提供座舱增压、飞机机体防冰和座舱供 热,从压气机中引出了大量的空气。最好是尽可 能从压气机前几级引气,以减小对发动机性能的 影响。但是,在飞行循环的某些阶段,可能需要 将引气部位变换到压气机的后面级,以维持足够 的压力和温度。
93
飞行翻译公司 www.aviation.cn 本文链接地址:劳斯莱斯喷气引擎-中英Rolls Royce The JET3
压气机向前的载荷
封严件向 前的载荷
涡轮向后的载荷
增大面积导致 增大向前的载荷
定位轴承 压力平衡封严件
Fig. 9-8 Control of axial bearing load.
bled from the compressor. It is desirable to bleed the air as early as possible from the compressor to minimize the effect on engine performance. However, during some phases of the flight cycle it may be necessary to switch the bleed source to a later compressor stage to maintain adequate pressure and temperature.
内部空气
图9-8 轴承轴向载荷的控制
upon a fixed diameter pressure balance seal to ensure the location bearing is adequately loaded throughout the engine thrust range. AIRCRAFT SERVICES 26. To provide cabin pressurization, airframe antiicing and cabin heat, substantial quantities of air are
轴承载荷控制
25.发动机轴承受交变的轴向燃气载荷(第20 章),在压气机中是向前的,在涡轮上是向后 的。压气机与涡轮之间的轴便经常处于拉伸应 力之下,载荷之间的差额则由装在静止机匣上 的定位轴承(又称止推轴承)承受(图9-8)。内部 空气的压力作用在一个固定直径的压力平衡封 严件上,以保证在整个发动机推力范围内,定 位轴承承受的载荷是适当的。
飞机服务
26.为了提供座舱增压、飞机机体防冰和座舱供 热,从压气机中引出了大量的空气。最好是尽可 能从压气机前几级引气,以减小对发动机性能的 影响。但是,在飞行循环的某些阶段,可能需要 将引气部位变换到压气机的后面级,以维持足够 的压力和温度。
93
飞行翻译公司 www.aviation.cn 本文链接地址:劳斯莱斯喷气引擎-中英Rolls Royce The JET3