Dynamic imbalance determining system

Details Dynamic imbalance determining system Dynamic imbalance determining system

1979-10-05

1981-04-21

Ciarlante, Anthony V.

Measuring and testing

Rotor unbalance

Dynamic

G01M 122

Patent

active

042625360

ABSTRACT:
An imbalance-determining system for a dynamic balancing machine for two-plane balancing of rotary elements such as vehicle wheel-and-tire assemblies includes a chuck and spindle mounted in a spindle housing in vibration-isolation orientation on a machine base. A drive mechanism includes main and auxiliary motors mounted on the machine base. The rotary element is brought to speed by a drive wheel mounted on the main motor to move between a driving orientation in contact with the rotary element and a storage orientation out of contact with the rotary element. A lightweight belt coupling the spindle to the auxiliary motor transmits power from the auxiliary motor to the rotary element. Once the rotary element is accelerated to the desired rotation frequency, the drive wheel is moved out of contact with the rotary element and the auxiliary motor is energized to maintain the rotary element rotation rate at about the desired frequency of rotation with little effort. Vibrational forces resulting from imbalance in the moving rotary element at the desired rotation frequency are transmitted through the spindle to the housing free of the effect of any imbalance in the drive wheel. Two vertically spaced load cells are mounted adjacent the spindle housing, and are responsive to forces transmitted through the spindle to generate input electrical signals related to the amounts and locations of imbalance in two planes of the rotary element. These input signals are processed to generate a system of equations soluble to resolve the input signals into signals indicative of the amount and location of imbalance in each of the two planes.

REFERENCES:
patent: 2898764 (1959-08-01), Kinsey et al.
patent: 2980331 (1961-04-01), Gruber et al.
patent: 3036467 (1962-05-01), McWhorter
patent: 3924473 (1975-12-01), Maus
patent: 4031760 (1977-06-01), Muller
patent: 4046017 (1977-09-01), Hill
patent: 4191055 (1980-03-01), Orem et al.

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