Creation of Optimal Design of Runner Oil System of Kaplan Hydro-Turbines

The main objectives of the reconstruction are stated. Those are: increase of the service life of the hydro-turbines of Dnipro Cascade, enhancement of their efficiency, power, and environmental safety, extension of the power control range of the hydro-power plants, assurance of the reliability and improvement of the operating safety of their equipment and structures, meeting the environmental requirements, improvement of the quality of the generated electric power after control system rehabilitation. The article deals with and analyses the chronology of the creation of the optimal design for a vertical Kaplan hydro-unit oil piping taking into consideration the half a century operational experience and stages of hydro-turbine modernization for Dnipro-2 HPP. The experience in improvement of the hydro-unit and oil head system control design is generalized, from the unified solution to the creation of the all-new design. The methods of the oil system rod machining and preliminary control are amended. The temperature control of the automatic unit shutdown in case of heating of oil head bushes is introduced into the control system. The oil piping installation method is improved and step-by-step checking of the oil piping installation centering is introduced. As a result of implementation of a package of design and process engineering solutions, the optimal design of the oil piping of improved reliability was created. It decreased the unscheduled downtime of the units and cut expenses on their maintenance providing the cyclic recurrence recommended by the standards for the operation of the oil pressure device pumps and thus, decreased the electric power consumption for balance-of-plant needs. The objects of the implementation of the developed oil piping design are given.

Differential Gear Box To Reduce Vibration Using Different Materials For Vehicles-A Review

Whatever framework is embraced to coordinate the automobile to its thought process unit — be it a hand shift gearbox, a 'hot' shift gearbox or completely automatic unit, a complex and generally expensive mechanism is ordinarily included. More than expected plan office consideration is centeredaround this region of a recently imagined vehicle. Grounded plan systems for transmission gearing were accessible before the principal automobile or even the inner combustion motor was created; solid answers have in this way been generally accessible from the planning phase. The intricacy of the mechanisms has additionally requested, on account of amount delivered vehicles, thorough drawing designs of the variety of segments included with the goal that resilience stacking can be read and the requirement for exceptionally talented fitting, during get together, decreased. The present-day meaning of the creator's commitment is additionally improved by the need to guarantee without a doubt the base of expensive turn of events or creation changes. The cautious determination of gear ratios for a manual unit, or of control boundaries in an automatic one, can drastically influence the presentation or driveability of the completed vehicle.

Stochastic Analysis of Dis-Similar Standby System with Discrete Failure, Inspection and Replacement Policy

The device named autoclave used in pharma industries has been studied in this paper. This study provides the discussion how to obtain the reliability testing strategy of two dis-similar parallel units. The system is considered to be in operative condition if at least one out of two is in operative state. A single repair facility is available for repairing both kinds of failed units. In addition to repair mechanism, inspection policy has also been introduced for failed automatic unit. But the manual one does not require any such supervision facilty. Various essential measures of system effectiveness such as mean time to system failure (MTSF), steady state availability, busy period of supervisor and repairman are examined probabilistically by using geometric distribution and regenerative point techniques. A graph has been plotted to represent the behaviour of profit function and MTSF with respect to different failure and repair rate.