本帖最后由 星丹 于 2010-3-24 14:36 編輯
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. Z% | M, u1 y& G Z# _1 c貼圖① 剝離和點(diǎn)蝕 Flaking and Pitting: v1 H& [* F. P2 g$ h8 n3 J* |
) M& {# ? v- V7 d現(xiàn)象,、原因和對(duì)策; z" p8 y8 O. |$ {. x
Phenomena , causes and countermeasures 失效示例" k, [' m- z1 P1 q# Y) U
Examples of failures
5 {) N) [6 X+ Q$ c6 }2 nPhenomena 剝離是指因材料的滾動(dòng)疲勞在滾道面及滾動(dòng)面表層部分出現(xiàn)的魚(yú)鱗狀損傷,。產(chǎn)生這種現(xiàn)象時(shí)，可認(rèn)為軸承已達(dá)到壽命,。
, w* A- u' H8 ~, e c% q7 a* s1 _因材料的滾動(dòng)疲勞引起的損傷還有點(diǎn)蝕,，是指在滾道面出現(xiàn)的深度為0.1mm左右的微孔
' X0 a3 }" J1 {7 R3 uFlaking is a phenomena in which the bearing surface turns scaly and peels off due to contact load repeatedly received on the raceway and rolling surface during roataion. Occurrence of flaking indicates that the end of a bearing’s service is near.
# Q1 ^1 i& M) O2 b- Q0 F4 }# GPitting is a phenomena in which small holes 0.1mm in depth are generated on the raceway surface by rolling fatigue. ! [0 n) [7 E- F- l. H
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Causes ● 軸承內(nèi)部游隙過(guò)小
5 q. Q* ~/ g$ @ T8 YDuring operation,bearing internal clearance becomes narrower than specified. n- b/ ^2 J4 [
● 軸承安裝不良7 K9 r- r2 z3 Z) x6 E
Bearing is mounted at an inclination by mistake .' d/ |" }; H. k) E2 K" b7 `
● Flaw is created during mounting,brinelling ,nicks,rust etc.
( j6 Y1 B: z+ P1 o● 軸或外殼的精度差
& E2 J t4 r) }6 T, g( u4 OInaccurate shape of shaft or housing. 3 L* v; e, b U: T; y# t) z
Countermeasures ◆ 選擇合適的軸承內(nèi)部游隙; U' r, T b1 x- A; R
◆ 正確定心0 b) J' q; F! T1 @. e, J
◆ 修正軸或外殼擋肩端面的垂直度
7 u3 ~! w* q- m◆ 改進(jìn)安裝作業(yè)方法 |
發(fā)表于 2009-10-13 15:19:10
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