МОНИТОРИНГ СОСТОЯНИЯ ПАР ТРЕНИЯ ЭНЕРГОСИЛОВЫХ УСТАНОВОК НА ОСНОВЕ КЛАСТЕРОВ ОДНОВИТКОВЫХ ВИХРЕТОКОВЫХ ДАТЧИКОВ

Abstract

The tasks of on-line assessment of the state of friction pairs of high-powered power plants are considered. The approaches to the solution of the tasks are offered, too. It is noted that the development of the appropriate methods and means for monitoring the parameters of the condition of bearing units of this class of machines will allow not only to detect timely the bearing damage and appearance of the pre-load state of the power plant, but also to estimate the residual life of the friction pair at each current point in time. This, in turn, facilitates the transition from the traditional routine maintenance and operation of power plants to their condition-monitored maintenance and operation. The proposed solutions are based on the use of original single-coil eddy-current sensors with sensitive elements in the forms of a wire segment or a single current circuit, as well as their cluster compositions (sensor ‘s groups or sensors with a group of sensitive elements). The simplicity of the sensor’s design and the technological solutions embedded in it ensure high technical and operational characteristics of the primary transducer and give the opportunity to use the sensors in real operating modes of power plants. It is proposed to use the information about the presence of metal wear particles of the friction pairs, washed with oil, in the lubrication system of the power plant and the axial displacement of the shaft in a radial thrust bearing as the main monitored parameters. The estimation of the bearing residual life resource can be given on the base of the information about the state of friction pair. A brief description of the methods for obtaining the information about the desired parameters is given. The principles of the construction of monitoring systems implement the methods is provided on the base of generalized structural scheme.