1、BRITISH STANDARDBS ISO 6194-5:2008Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 5: Identification of visual imperfectionsICS 23.100.60; 83.140.50g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3
2、g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 6194-5:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 May 2008 BSI 2008ISBN 978 0 580 53182 8National forewordThis British Standard is the UK implementa
3、tion of ISO 6194-5:2008. It supersedes BS 7780-5:1994 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee MCE/11, Fluid seals and their housings.A list of organizations represented on this committee can be obtained on request to its secretary.This publicat
4、ion does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsReference numberISO 6194-5:2008(E)
5、INTERNATIONAL STANDARD ISO6194-5Second edition2008-04-15Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 5: Identification of visual imperfections Bagues dtanchit lvres pour arbres tournants incorporant des lments dtanchit en lastomre Partie 5: Identification des imperfect
6、ions visuelles BS ISO 6194-5:2008ii iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references 1 3 Terms and definitions .1 4 Characteristic imperfections 1 4.1 Definition of sealing lip critical area 1 4.2 Type and name of imperfections2 4.3 Typical sealing edge imperfections.2 4.
7、4 Typical sealing lip imperfections (except sealing edge) .5 4.5 Typical spring imperfections6 4.6 Typical outside diameter imperfections6 4.7 Typical protection lip imperfections7 5 Identification statement (reference to this part of ISO 6194) .8 Bibliography 9 BS ISO 6194-5:2008iv Foreword ISO (th
8、e International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committ
9、ee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechn
10、ical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member
11、bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying
12、any or all such patent rights. ISO 6194-5 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 7, Sealing devices. This second edition cancels and replaces the first edition (ISO 6194-5:1990) which has been technically revised. ISO 6194 consists of the following parts
13、, under the general title Rotary-shaft lip-type seals incorporating elastomeric sealing elements: Part 1: Nominal dimensions and tolerances Part 2: Vocabulary Part 3: Storage, handling and installation Part 4: Performance test procedures Part 5: Identification of visual imperfections BS ISO 6194-5:2
14、008vIntroduction Rotary-shaft lip-type seals are used to retain fluid, e.g. lubricant, in equipment where the differential pressure is relatively low. Typically, the shaft rotates and the housing is stationary, although in some applications the shaft is stationary and the housing rotates. Dynamic se
15、aling is normally the result of a designed interference fit between the shaft and a flexible element incorporated in the seal. Similarly, a designed interference fit between the outside diameter of the seal and the diameter of the housing bore retains the seal and prevents static leakage. Careful st
16、orage, handling, and proper installation of all seals are necessary to avoid hazards, both prior to and during installation, which can adversely affect service life. BS ISO 6194-5:2008blank1Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 5: Identification of visual imperf
17、ections 1 Scope This part of ISO 6194 describes seals utilizing elastomeric sealing elements. They are normally considered suitable for use only at low pressures (see ISO 6194-1:2007, 6.1). This part of ISO 6194 defines and classifies typical surface imperfections that can impair the function of the
18、 seals and is intended as a convenience for purchasers and manufacturers in their discussions concerning the importance of these imperfections in different applications. NOTE ISO 6194 (all parts) is complementary to ISO 16589 (all parts), which covers seals incorporating thermoplastic sealing elemen
19、ts. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5598, Fluid power
20、system and components Vocabulary ISO 6194-2, Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 2: Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 5598 and ISO 6194-2 apply. 4 Characteristic imperfections 4.1 Defin
21、ition of sealing lip critical area See Figure 1 and Table 1. Dimensions x and y were chosen because, in cases of wear, imperfections in this area can impair the function of the rotary-shaft lip-type seal during its lifetime. BS ISO 6194-5:20082 Key 1 lip fluid side 2 sealing edge 3 lip air side 4 op
22、tional protection lip NOTE The values for x and y are given in Table 1. Figure 1 Sealing lip critical area Table 1 Typical dimensions of sealing lip critical area Dimensions in millimeters Shaft diameter d1xayad1u 50 0,6 1,2 50 120 1 2 aThese are typical values; specific values shall be agreed to be
23、tween purchasers and suppliers. 4.2 Type and name of imperfections See Figure 2. 4.3 Typical sealing edge imperfections See Figure 2 and Figures 3 to 14 for the following types of imperfections; keyed elements are identified in Figure 2: inclusion (see Figures 3, 4, and 5); crack (see Figure 6); rou
24、gh trim (see Figure 7); step trim (see Figure 8); nick (see Figure 9); knit line (see Figure 10); tear (see Figure 11); cut (see Figure 12); filler projection (see Figure 13); stuck flash (see Figure 14). BS ISO 6194-5:20083Key 1 inclusion 5 crack 9 cut 13 split 2 nick 6 rough trim 10 filler project
25、ion 14 flash on optional protection lip 3 step trim 7 knit line 11 non-fill 4 tear 8 stuck flash 12 blister Figure 2 Type and name of imperfections Figure 3 Inclusion: flash Figure 4 Inclusion: filler Figure 5 Inclusion: foreign material Figure 6 Crack BS ISO 6194-5:20084 Figure 7 Rough trim Figure
26、8 Step trim Figure 9 Nick Figure 10 Knit line Figure 11 Tear Figure 12 Cut Figure 13 Filler projection Figure 14 Stuck flash BS ISO 6194-5:200854.4 Typical sealing lip imperfections (except sealing edge) See Figure 2 and Figures 15 to 20 for the following types of imperfections; keyed elements are i
27、dentified in Figure 2: split (see Figure 15); stuck flash (see Figure 16); non-fill (see Figure 17); crack (see Figure 18); tear (see Figure 19); blister (see Figure 20). Figure 15 Split Figure 16 Stuck flash Figure 17 Non-fill Figure 18 Crack Figure 19 Tear Figure 20 Blister BS ISO 6194-5:20086 4.5
28、 Typical spring imperfections See Figures 21 to 23 for the following types of imperfections; keyed elements are identified in Figure 2: deformed spring (see Figure 21); spring with stretched coil portion (see Figure 22); spring with incomplete joint portion (see Figure 23). Figure 21 Deformed spring
29、 Figure 22 Spring with stretched coil portion Figure 23 Spring with incomplete joint portion 4.6 Typical outside diameter imperfections See Figures 24 to 26 for the following types of imperfections; keyed elements are identified in Figure 2: scratch (see Figure 24); incorrect chamfer (see Figure 25)
30、; incomplete bond (see Figure 26). BS ISO 6194-5:20087Figure 24 Scratch Figure 25 Incorrect lead-in chamfer on seal outside diameter Figure 26 Incomplete bond 4.7 Typical protection lip imperfections See Figures 27 to 30 for the following types of imperfections; keyed elements are identified in Figu
31、re 2: tear (see Figure 27); cut or nick (see Figure 28); non-fill (see Figure 29); flash (see Figure 30). BS ISO 6194-5:20088 Figure 27 Tear Figure 28 Cut or nick Figure 29 Non-fill Figure 30 Flash 5 Identification statement (reference to this part of ISO 6194) It is strongly recommended that manufa
32、cturers use the following statement in test reports, catalogues and sales literature when electing to comply with this part of ISO 6194: “Visual imperfection identification is in accordance with ISO 6194-5, Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 5: Identification
33、 of visual imperfections.” BS ISO 6194-5:20089Bibliography 1 ISO 6194-1:2007, Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 1: Nominal dimensions and tolerances 2 ISO 6194-31), Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 3: Storage, handl
34、ing and installation 3 ISO 6194-41), Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 4: Performance test procedures 4 ISO 16589-1, Rotary shaft lip-type seals incorporating thermoplastic sealing elements Part 1: Nominal dimensions and tolerances 5 ISO 16589-2, Rotary shaf
35、t lip-type seals incorporating thermoplastic sealing elements Part 2: Vocabulary 6 ISO 16589-3, Rotary shaft lip-type seals incorporating thermoplastic sealing elements Part 3: Storage, handling and installation 7 ISO 16589-4, Rotary shaft lip-type seals incorporating thermoplastic sealing elements
36、Part 4: Performance test procedures 8 ISO 16589-5, Rotary shaft lip-type seals incorporating thermoplastic sealing elements Part 5: Identification of visual imperfections 1) To be published. BS ISO 6194-5:2008BS ISO 6194-5:2008BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI
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