Petroleum, petrochemical and natural gas industries. Flexible couplings for mechanical power transmission. General-purpose applications (ISO 14691:2008)
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ISO 14691:2008 specifies the requirements for couplings for the transmission of power between the rotating shafts of two machines for general-purpose applications in the petroleum, petrochemical and natural gas industries. Such applications typically require couplings to transmit power at speeds not exceeding 4 000 r/min, between machines in which the first lateral critical speed is above the running speed range (stiff-shaft machines). ISO 14691:2008 can, by agreement, be used for applications outside these limits. ISO 14691:2008 is applicable to couplings designed to accommodate parallel (or lateral) offset, angular misalignment and axial displacement of the shafts without imposing excessive mechanical loading on the coupled machines. Couplings covered by ISO 14691:2008 include gear (and other mechanical contact types), metallic flexible-element and various elastomeric types. Such couplings can be of all metal construction or can include components of non-metallic materials, such as composites. ISO 14691:2008 covers design, materials of construction, inspection and testing of couplings and methods of attachment of the coupling to the shafts (including tapered sleeve and other proprietary devices). ISO 14691:2008 does not apply to special types of couplings, such as clutch, hydraulic, eddy-current, rigid and radial-spline types. ISO 14691:2008 does not define criteria for the selection of coupling types for specific applications.
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Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Statutory requirements
5 Coupling selection
5.1 General
5.2 Compliance
6 Purchaser's specification
7 Coupling rating
8 Construction requirements
8.1 General
8.2 Materials of construction
8.3 Coupling hubs
8.4 Bolting
8.5 Electrical insulation
8.6 Alignment provision
8.7 Rotor dynamic data
8.8 Non-horizontal applications
8.9 Additional requirements for gear couplings
8.10 Additional requirements for metallic flexible-element couplings
8.11 Additional requirements for elastomeric couplings
9 Balance
9.1 Objectives
9.2 Balance quality
9.3 Additional balancing requirements
9.4 Verification of coupling balance
10 Accessories
11 Manufacturing quality, inspection, testing and preparation for shipment
11.1 Manufacturing quality
11.2 Inspection and testing
11.3 Preparation for shipment
12 Vendor's data
12.1 General
12.2 Proposals
12.3 Contract data
Annex A Examples of misalignment (informative)
Annex B Example of the determination of potential unbalance (informative)
ANSI/AGMA 9002-B:2004
ANSI/AGMA 9003-B:2008
ANSI/AGMA 9112-A:2004
DIN 7190:2001
ISO 1940-1:2003 Mechanical vibration -- Balance quality requirements for rotors in a constant (rigid) state -- Part 1: Specification and verification of balance tolerances
ISO 286-2:1988 ISO system of limits and fits -- Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts
ISO 8821:1989 Mechanical vibration -- Balancing -- Shaft and fitment key convention