The basics of applying the torque method for kinematic and power analysis of planetary gear trains are presented. With the help of the method, the speed ratios and efficiency of a real planetary gearbox are determined when operating on different gears (speeds).
An alternative method for kinematic and power analysis of compound gear train is presented, which uses the torques and lever analogy of a given gear train. The method combines the accuracy of the Willis analytical method with the clarity of the graphic method of Kutzbach. Unlike these methods, the torque method allows determining not only the gear ratio, but the magnitude and direction of power flows, and hence the determination of efficiency of a given compound planetary gear train. The application of the method is illustrated with example of complex change-gear (gear-box).
The paper considers centrifugal pumps 8 Gr-8, component of the hydro-transport of the ore-dressing operation line, which pumps abrasive hydro-mixtures (pulp). The pumps working conditions are described and the results from wear measurement of the impeller, wear plate and housing are shown for different operation times. The wear patterns of the examined parts are determined and the causes for their intensive wear and the methods of its reduction are identified.
Examined and shown ways to improve water supply to agro-industrial complex consumers agribusiness in Kazakhstan to irrigate pastures and irrigation in market conditions. There are given the theoretical foundations of the most progressive method of restoring the production rate of underground water source – a well by the use of compressed air and airlift technology, which can be recommended for practical application. They are purpose for definition of the main parameters of the process: the need to over-pressure compressed air supply compressor, power consumption and efficiency.