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This part of ISO 21940 specifies requirements for evaluating the performance of machines for balancing rotating components by the following tests: a) test for minimum achievable residual unbalance, Umar test; b) test for unbalance reduction ratio, URR test; c) test for couple unbalance...
Characteristics of vertical non-rotating balancing machines are described which make such machines suitable for balancing rigid unbladed gas turbine rotors or rotors with fixed, integral blades.
Recommendations on some aspects of the balancing problem; permissible residual unbalance in relation to rotor mass and service speed; balance quality in terms of nine balance quality grades for general purposes and two for use where very low residual unbalance is...
ESDU 89028 gives a step-by-step procedure for force-balancing planar single degree of freedom linkages. Balance is achieved by the addition of counterweights so that the resulting centre of mass of the linkage remains stationary throughout the motion cycle. The procedure, each step of...
ESDU 89043 gives guidance on selecting in given circumstances the most appropriate balancing technique to eliminate or reduce both the shaking force and the shaking moment on a planar linkage. Design criteria on which a rational choice depends are discussed and, by means of a tabular...
Characteristics of vertical hard-bearing balancing machines are described which make such machines suitable for gas turbine rotor balancing.
Gives rules for describing and evaluating portable field balancing equipment to enable users to compare different maufacturers' products. Lists items to be described including system operation and performance limits, and mechanical and electrical characteristics of the components such...
For rotors of marine main propulsion turbines (maximum design operational speed 9000 rev/min), associated reduction gear elements, couplings and torsion shafts; excluding propeller shafting. Methods of balancing (both static and dynamic), determination of maximum permissible unbalance,...
Characteristics of vertical hard-bearing balancing machines are described which make such machines suitable for gas turbine rotor balancing.
ISO 21940-11:2016 establishes procedures and unbalance tolerances for balancing rotors with rigid behaviour. It specifies a) the magnitude of the permissible residual unbalance, b) the necessary number of correction planes, c) the allocation of the permissible residual unbalance to the...
Provides a classification of rotors with respect to balancing requirements, gives procedures for balancing rotors and assessing their final unbalance and provides initial guidance on the establishment of balance quality grades.
This ARP specifies both the nominal dimensions and the tolerances for a series of ball bearings with semifinished inside diameters which are suitable for supporting gas turbine rotating components in dynamic balancing machines.
ISO 21940-12:2016 presents typical configurations of rotors with flexible behaviour in accordance with their characteristics and balancing requirements, describes balancing procedures, specifies methods of assessment of the final state of balance, and establishes guidelines for...
This part of ISO 21940 presents typical configurations of rotors with flexible behaviour in accordance with their characteristics and balancing requirements, describes balancing procedures, specifies methods of assessment of the final state of balance, and establishes...
This document establishes procedures and unbalance tolerances for balancing rotors with rigid behaviour. It specifies a) the magnitude of the permissible residual unbalance, b) the necessary number of correction planes, c) the allocation of the permissible residual unbalance to the tolerance...
This document defines terms on balancing. It complements ISO 2041, which is a general vocabulary on mechanical vibration and shock.
Specifies methods of evaluating balance quality of a flexible rotor in a balancing facility before machine assembly with a view to ensuring satisfactory running of the assembled machine after installation on site. Complementary to BS 5265:Part 2:1981.
This document defines terms on balancing. It complements ISO 2041, which is a general vocabulary on mechanical vibration and shock.
This International Standard provides an introduction to balancing and directs the user through the available International Standards associated with rotor balancing. It gives guidance on which of these standards should be used. Individual procedures are not included here as these will...
This part of ISO 21940 specifies the requirements for the following: a) identifying errors in the unbalance measuring process of a rotor; b) assessing the identified errors; c) taking the errors into account. This part of ISO 21940 specifies balance acceptance criteria, in terms of residual...
