高压压气机孔探力矩

机务凯 · 发表于 2024-2-26 20:44:07

对于cfm56-5b发动机，S7S8S9三处高压压气机的孔探点在手册中的要求是：先拧紧，再松开，再用一个“大于running torque15-20的力矩拧紧”。这样做是为什么？难道像换轮一样？有一个压紧力矩？不至于吧。为什么先用大力矩拧紧再松开，然后又打了一个小一点的力矩？还有就是对于这个"running torque"如何翻译

来自安卓APP客户端

机务凯 · 发表于 2024-2-27 20:24:39

救命

来自安卓APP客户端

OBDZ · 发表于 2024-2-29 13:19:14

这三个堵头是双螺纹，我感觉两遍力矩是为了保证里面的螺纹压紧，但又不至于被高温咬死下次拆不下来

机务凯 · 发表于 2024-2-29 14:58:13

OBDZ 发表于 2024-02-29 13:19
这三个堵头是双螺纹，我感觉两遍力矩是为了保证里面的螺纹压紧，但又不至于被高温咬死下次拆不下来

有道理，但又emmm不能完全说服我

来自安卓APP客户端

机务凯 · 发表于 2024-3-2 15:15:42

还有没有老哥

来自安卓APP客户端

清水君 · 发表于 2024-3-4 12:53:46

外网的讨论，供参考
It does not differ from regular torque - it is simply the amount of torque required to keep a component moving at its current speed. This means it precisely the same magnitude (but opposite direction) as all of the frictional torques trying to slow your component down

来自安卓APP客户端

开心哥哥 · 发表于 2024-3-4 19:15:28

Free Running Torque:
The free running torque is the torque necessary to overcome the kinetic friction between the mating threads. This torque is measured in the loosening or tightening direction.
This type of torque does not overcome:
-
Self-locking mechanisms
-
Axial loads in fastener assemblies.

机务凯 · 发表于 2024-3-4 21:26:59

开心哥哥发表于 2024-03-04 19:15
Free Running Torque:
The free running torque is the torque necessary to overcome the kinetic friction between the mating threads. This torque is measured in the loosening or tightening direction.
This type of torque does not overcome:
-       
Self-locking mechanisms
-       
Axial loads in fastener assemblies.

厉害

来自安卓APP客户端

帐号		自动登录	找回密码
密码			立即注册

[70-80 CFM56] 高压压气机孔探力矩

中国民航大学

飞龙通用航空

在线王