{"id":260057,"date":"2024-10-19T17:13:23","date_gmt":"2024-10-19T17:13:23","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-113421998\/"},"modified":"2024-10-25T12:55:00","modified_gmt":"2024-10-25T12:55:00","slug":"bs-iso-113421998","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-113421998\/","title":{"rendered":"BS ISO 11342:1998"},"content":{"rendered":"

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\nBRITISH STANDARD <\/td>\n<\/tr>\n
2<\/td>\nNational foreword <\/td>\n<\/tr>\n
3<\/td>\nContents <\/td>\n<\/tr>\n
9<\/td>\nIntroduction
1 Scope <\/td>\n<\/tr>\n
10<\/td>\n2 Normative references
3 Definitions
4 Fundamentals of flexible rotor dynamics and balancing
4.1 General
4.2 Unbalance distribution
4.3 Flexible rotor mode shapes <\/td>\n<\/tr>\n
11<\/td>\nFigure 1 Simplified mode shapes for flexible rotors on flexible supports <\/td>\n<\/tr>\n
12<\/td>\nFigure 2 Examples of possible damped mode shapes
4.4 Response of a flexible rotor to unbalance <\/td>\n<\/tr>\n
13<\/td>\n4.5 Aims of flexible rotor balancing
4.6 Provision for correction planes <\/td>\n<\/tr>\n
14<\/td>\n4.7 Rotors coupled together
5 Rotor configurations <\/td>\n<\/tr>\n
17<\/td>\n6 Procedures for balancing flexible rotors at low speed
6.1 General
6.2 Selection of correction planes
6.3 Service speed of the rotor
6.4 Initial unbalance <\/td>\n<\/tr>\n
18<\/td>\n6.5 Low-speed balancing procedures <\/td>\n<\/tr>\n
19<\/td>\n7 Procedures for balancing flexible rotors at high speed
7.1 General
7.2 Installation for balancing <\/td>\n<\/tr>\n
20<\/td>\n7.3 Procedure G \u2014 Multiple-speed balancing <\/td>\n<\/tr>\n
22<\/td>\n7.4 Procedure H \u2014 Service-speed balancing
7.5 Procedure I \u2014 Fixed speed balancing <\/td>\n<\/tr>\n
23<\/td>\n8 Evaluation criteria
8.1 Choice of criteria
8.2 Vibration limits in the balancing facility <\/td>\n<\/tr>\n
25<\/td>\n8.3 Residual unbalance limits <\/td>\n<\/tr>\n
26<\/td>\n9 Evaluation procedures
9.1 Evaluation procedures based on vibration limits <\/td>\n<\/tr>\n
27<\/td>\n9.2 Evaluation based on residual unbalance limits <\/td>\n<\/tr>\n
29<\/td>\nAnnex A (informative) Cautionary notes concerning rotors on site
A.1 Introduction
A.2 Bearing misalignment
A.3 Radial and axial runout of coupling faces
A.4 Bearing instability
Annex B (informative) Optimum planes balancing \u2014 Low-speed three-plane balancing <\/td>\n<\/tr>\n
30<\/td>\nFigure B.1
Annex C (informative) Conversion factors <\/td>\n<\/tr>\n
31<\/td>\nAnnex D (informative) Example \u2014 Calculation of equivalent modal residual unbalance
D.1 Residual unbalance calculation <\/td>\n<\/tr>\n
32<\/td>\nFigure D.1 Turbine rotor
Figure D.2 Run-up curve \u2014 Before balancing
D.2 Influence coefficients <\/td>\n<\/tr>\n
33<\/td>\nD.3 Final vibration readings
D.4 Residual unbalance at low speed, 1 000 r\/min
D.5 Residual unbalance at 3 400 r\/min
D.6 Residual unbalance at 9 000 r\/min <\/td>\n<\/tr>\n
34<\/td>\nAnnex E (informative) Procedure to determine if a rotor is rigid or flexible
E.1 General
E.2 Determination of whether a rotor is rigid or flexible <\/td>\n<\/tr>\n
35<\/td>\nE.3 Rotor flexibility test
E.4 Evaluation of flexibility test data <\/td>\n<\/tr>\n
36<\/td>\nAnnex F (informative) Example \u2014 Permissible equivalent modal unbalance calculation <\/td>\n<\/tr>\n
37<\/td>\nAnnex G (informative) A method of computation of unbalance correction
Annex H (informative) Definitions from ISO 1925:1990 and ISO 1925:1990\/Amd 1:1995 relating to flexible ro… <\/td>\n<\/tr>\n
39<\/td>\nAnnex I (informative) Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Mechanical vibration. Methods and criteria for the mechanical balancing of flexible rotors<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n1998<\/td>\n40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":260062,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[321,2641],"product_tag":[],"class_list":{"0":"post-260057","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-21-120-40","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/260057","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/260062"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=260057"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=260057"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=260057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}