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德國機械設備制造業聯合會(VDMA)的液壓密封培訓教材，ppt格式，一共19個壓縮包。目錄如下：
1 U7 _# @4 x: U% n/ Q- n7 W% }$ @Basics of Sealing Technology 9 B }1 Y. l8 W, h* d
Application fields for fluid seals
0 x, v2 K2 k* n) m% | }" ?* W* a9 A. N
Seal types 7 J1 r T6 Z, [) c+ b) i9 G
Sealing mechanism 7 ]" B% S, k9 H& d) n
Friction
. y) J2 K0 e8 dParameters influencing sealing mechanism and friction & X3 f, I0 x' J1 k' Z
3 G! k; N X7 O KSealing Materials
5 h" ~$ h" L! `+ ]Material overview
9 b `0 x( X3 d% H( s# T/ \3 f; PThermoplastic elastomers ! G: u) {' v y% W9 ?% j1 L; [2 z
Elastomers
$ u7 U% j$ T- U% K/ w. UThermoplastics
0 s7 ^5 T9 y, s5 `' O. Q
4 @) ?2 e! |! jManufacturing Processes for Seals
- |4 |4 W! K8 h- o
% [/ k) c6 d2 K' J1 F- \# XProcessing of rubber and rubber fabrics ( k0 d U( K- L9 ^: U
Processing of plastics by injection moulding 6 X# W; ]; M7 N1 C: K
Processing of PTFE - r& J5 S# `! ~, a) _
Engineering Design Guidelines }# l; g$ \8 K2 x4 D9 D
Introduction
$ K, X) I$ G- c4 `Basic function of the seal & k& n _/ r. S1 g2 l
Seal assembly
% I" _3 n; E9 D& g4 T- ~Sealing surfaces
7 @* c" z9 ^( B0 c" W" QGaps
3 p% p) x7 G9 W5 j8 iWipers/scrapers
; ~; J4 ?3 n2 \0 R3 W( kFlow turbulences + h4 i$ G* K0 x! ?$ T# O1 h e
Excess pressure loads
: n# k& }3 a5 `3 N+ E“Seal-friendly“ surfaces
/ R' `9 j/ ` h% b; p7 r5 ZConcentricity
$ {8 S9 Y) _ u6 g. f) ?/ QInstallation spaces for O-rings # Y2 H8 B3 A g; s5 F( u
Installation spaces for lip seals . b- R' Y6 y! j
Installation spaces for chevron packings
1 u& e) I! {+ ]( j. G) t# x/ G0 oInstallation spaces rubber-activated coaxial seals
$ Q0 d* ?2 Z. U3 `& L T; q( T0 w" ^5 ^
Installation spaces for compact seals : f6 o" ?6 g* G) y6 ]8 b2 V
Installation spaces for guide tapes % h+ a( W/ c! s( L9 \8 E \
Typical design errors involving seals
/ y9 y1 q3 U6 l: k' mFavourable design features for seal assembly- P( c5 Y5 b }; V- Y
0 u, d$ G2 |: a6 D7 s
Standards
+ `2 [- o/ e' J6 C* L6 TSeal Types
- I" O5 t& B7 C( ~6 |9 DHydraulic seals
. O% U" \ u5 L. U# `9 ZPneumatic seals * o# r1 [8 Q# P3 U% e
Static seals
% J% e" J2 v: k" R" |Rotary seals % q1 T8 D/ B3 X% ?4 ?3 y8 R
8 c# [( n6 {+ V
Application Examples
; F$ ]0 G: n I9 h' m) f( K. ]Hydraulics 9 r! y6 Y6 N# u f& f+ y
Pneumatics 9 H& }8 X( {& ~' k
5 ]* _0 u, C# l& q3 G% N& z1 I. \
Failures 4 n5 M9 j% r6 \3 z$ \9 h( }
Failure causes R7 z1 L* ?- a: t9 b: C/ M
Failures (examples)
! \4 j" Z4 }3 f+ K. X0 l- P3 A& R" H5 {: I3 ~
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發表于 2008-10-4 15:51:43
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