Kozodoy D. Noise range decrease at working places of urban water-supply pump stations.

The object of research is the work conditions on working places of pump house in city water supply. The aim of thesis is the improvement of work conditions of personal working places of pump house in city water supply due to explanation and work out ways of reducing noise. Methodological and theoretical bases of research consisted of scientific and method works of home and foreign scientists in the field of labour protection, reducing noise in the source and in spreading way. Experimental method with using of experiment planning theory and regressive analysis theory was used for assessment of parameters, defined vibro- and noise radiation of pump devices; analytical method based on using the basis of vibration theory for working out of effective methods in reducing of vibroacoustic activity of pump devices; vibrodiagnostic method for interconnection establishment of vibroacoustic activity and technologic parameters of pump equipment was used too. Dependences, characterized communication of pump device performances with their vibroacoustic activity, were received. Dynamics of pump device drives was analyzed, rational meaning of rigidity characteristics were received. The change scheme, allowed to reduce noise on the working places, of flexural stiffness shaft of pump impeller was based theoretically and suggested. Vibrodiagnostic as way of reducing noise and vibrations was suggested to use. The received results are allowed to improve workers' work conditions of pump station due to adjusting in accordance of noise levels with demands of sanitary code. It is recommended for introduction on enterprises, used centered pump devices.