DESIGN OF A MEASUREMENT STAND FOR PRECISION DETERMINATION OF THE MASS-INERTIA ASSYMETRY
OF LONG ITEMS BY DYNAMIC BALANCING 

Aleksandr V. Klyuchnikov, Candidate of technical sciences, chief specialist, Russian Federal Nuclear Centre – All-Russia Research Institute of Technical Physics named after Academician E.I. Zababakhin (13 Vasilyeva street, Snezhinsk, Russia), a.klyuchnikov@bk.ru

Background. One of the major tasks challenges designer and manufacturer of a composite rotor, which as an example, presents itself a long gyration item with frames, compartments, instruments in it composition, is matching parameters of mass-inertia asymmetry with values, specified in operational documentation for the item. Materials and methods. Both characterization and ensuring these mass-inertia asymmetry parameters are made at a final assembly stage, with special check-out gauging stands. Using of dynamic balancing stands and dynamic balancing methods allows to a great extent improve an accuracy of measurement of mass-inertia asymmetry parameters compared with stands, which realized static methods of balancing. In the article both design-and-technological features and functioning features of vertical dynamic balancing stand with cone gas bearings, which is intended for high accurate balancing of long item, which equips by only correction plane, are given. When measuring the item under control is placed inside some special technological equipment, providing physical protection of the external surface of the item, and then generating the second correction plane. The algorithm of sensor signals processing, enabling selection of the useful signals from the additive mixture of power industrial noise. Results and conclusions. The methods of balancing of the item enables omitting intermediate steps of balancing, reducing them to one step (as a rule), and shortening the balancing time, as well. In one step of balancing the methods permits either bringing parameters of mass-inertia asymmetry of the item to specified standards, or diagnosing impossibility of attaining the specified standards with available design of item, if uses only plane for correction of nonbalances. An accuracy of determination of long item's
mass-inertia asymmetry parameters with the use of the offered dynamic balancing stand with cone gas bearings has been overfulfilled more than five times an accuracy of determination of the same parameters with using stands, which realized weight and pendulum methods.

rotor structure, geometric axis, mass, center of mass, axis of inertia, vibration, dynamic balancing, balancing stand, working standard

Klyuchnikov A.V. Design of a measurement stand for precision determination of the mass-inertia assymetry of long items by dynamic balancing. Nadezhnost' i kachestvo slozhnykh sistem = Reliability and quality of complex systems. 2023;(1): 106–117. (In Russ.). doi:10.21685/2307-4205-2023-1-13