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Xaiv qhov tsawg kawg nkaus kev nyab xeeb clearance rau aircraft cav sealing li

Kev txo qis qhov sib txawv ntawm cov lus qhia ntawm cov hniav thiab cov casing, thaum ua kom muaj kev nyab xeeb ntawm lub tshuab compressor, yog ib qho kev ntsuas zoo los txo qhov to. Kev xaiv qhov tsawg kawg nkaus kev nyab xeeb tshem tawm yog qhov teeb meem nyuaj. Nws yog ze ze rau kev tsim precision ntawm qhov chaw, rigidity ntawm lub rotor thiab casing, thiab kev sib koom tes ntawm thermal expansion ntawm cov khoom thaum lub sij hawm ua hauj lwm. Tam sim no, nyob rau hauv qee lub cav, ntxiv rau kev siv ob npaug - txheej casing los tuav lub roundness ntawm lub puab casing, cov kev ntsuas hauv qab no kuj tau ua:

 

(1) Piv txwv li, hauv JT9D74R thiab PW4000, tom qab lub siab - compressor compressor rotor tau sib sau ua ke, cov lus qhia rotor hniav yog av ib zaug siv lub tshuab sib tsoo tshwj xeeb. Qhov no txhim kho qhov sib npaug ntawm rotor thiab ua kom lub cev tsis sib xws.

 

(2) Hauv qee lub cav, ib qho yooj yim - hnav txheej yog siv rau sab hauv phab ntsa ntawm lub casing, thiab hnav- cov khoom siv tiv taus yog siv rau cov lus qhia rotor hniav. Thaum lub sij hawm sib dhos, lub rotor yog siv los ua ib lub log sib tsoo kom sib tsoo lub voj voog nyob hauv lub casing, tswj xyuas qhov sib txawv ntawm cov hniav sib txawv.

 

(3) Casing cov ntaub ntawv uas tsis tshua muaj coefficient ntawm linear expansion kuj raug xaiv.