The Method of Generating Synthetic Characteristic Curve of Pelton Turbine Prototype

Abstract

The invention relates to a three-dimensional model conversion technology, and aims at solving the problems of heavy workload, many artificial influence factors, low working efficiency and low mapping accuracy as auxiliary lines are required to be made when a pelton model turbine synthetic characteristic curve is converted into a pelton prototype synthetic characteristic curve at present. According to a generation method of a pelton prototype turbine synthetic characteristic curve disclosed by the invention, coordinates of points on respective equal efficiency curves, equal power output curves and equal nozzle opening curves under respective nozzle numbers of a prototype turbine are calculated by means of computer software according to a model turbine synthetic characteristic curve; respective isolines under the respective nozzle numbers corresponding to a model turbine are drawn on an H-P planar coordinate graph and a Q-H planar coordinate graph respectively. The generation method is applicable to converting the pelton model turbine synthetic characteristic curve into the pelton prototype synthetic characteristic curve, wherein the model turbine synthetic characteristic curve consists of the equal efficiency curves and the equal nozzle opening curves in a plane graph where a turbine head coefficient is vertical coordinate and a flow coefficient is a transverse coordinate.

Description

technical field [0001] The invention relates to a three-dimensional model conversion technology, in particular to a method for generating a comprehensive characteristic curve of a bucket type water turbine prototype. The comprehensive characteristic curve of the water bucket model turbine is determined by the water head coefficient ψ of the model turbine under the number of nozzles 1 and flow coefficient It is composed of equal efficiency lines and equal nozzle opening lines on the plan view of vertical and horizontal coordinates. Background technique [0002] The prototype water turbine refers to the machine in the hydropower station that converts the mechanical energy of the water flow into the mechanical energy of the runner, so that the runner and the main shaft can overcome various resistances and run continuously. It is called the "heart" of the hydropower station. The play of economic benefits plays a decisive role. The prototype turbine is transformed from the mo...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of large workload, many human influence factors, low work efficiency and drawing accuracy when converting the comprehensive characteristic curve of the bucket type model water turbine into the comprehensive characteristic curve of the bucket type prototype in the prior art. The curve can not meet the requirements of unit optimal dispatching, which is not conducive to the safety and economic benefits of the power station.