Optimization of low frequency balancing of GD-40 rotor

Problem solutions connected with rotary vibration decrease issues are based upon a linear vibration theory. The theory also points out main vibration control measures: vibration isolations, damping, dynamic damping, decreasing the amount of driving force. One of the examples of the last mentioned is rotor balancing, particularly low-speed balancing. A low-speed rotary balancing is a fulfillment of a condition of a rotation axis passing through its centre of mass and compliance of a rotation axis of a rotary with one of its main inertial axes. Recently rather compact low frequency balancing machines of BM series, named “Morion”, allowing static and instant balancing of rotary mass up to 3 kilos have appeared in Russia. The machine is placed on the table. Such machines have found use during rotary balancing of turbines of internal-combustion engines and gas-turbine engines, as the production of such rotors is large and each item is needed to be balanced The aim is to determine the extent to which the introduction of a third plane correction in a given cross- section increases the efficiency of the available low-frequency balancing on the balancer “Morion”. The project addressed the following questions: •Building a computational model of the rotor GD-40; •Determination of natural frequencies and forms of the spinning rotor; •Develop and probabilistic reasoning - a statistical model of the rotor unbalance shaft-mounted design; •Study the effectiveness of balancing systems using different corrective masses; •Use a 3-plane balancing in practice; •Analysis of influence of the correction planes.