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Модель расчетного обоснования регулирования расхода в каскаде насосных станций путем дросселирования напора

Модель расчетного обоснования регулирования расхода в каскаде насосных станций путем дросселирования напора

Abstract

The article describes the developed method of calculation and an algorithm allowing carrying out calculations on fl ow control in a cascade of pumping stations by throttling pressure. The operating experience of pumping stations shows [1] that major damages and accidents of pump aggregates happen during transient processes, start-up and stops which in accordance with the work schedule can be assigned several times a day, as well as under emergency shutdown of electric engines from the power system. Therefore, when designing pumping stations it is necessary to comprehensively take into account the work of the pressure tract and technological equipment and to assign schemes and structures on the basis of calculations and analysis of transient processes with an allowance to static and dynamic characteristics of pumps and electric motors. The aim of investigations is developing recommendations for designing cascades of irrigation pumping stations operating in series without an intermediate capacity which relate to the defi nition of parameters of the pressure system and shockproof devices. To achieve this aim it is necessary to solve the problem of fl ow control in the cascade by throttling pressure.

В статье приводится описание разработанной методики расчета и алгоритм, позволяющий проводить расчеты по регулированию расхода в каскаде насосных станций путем дросселирования напора. Опыт эксплуатации насосных станций показывает [1], что основные повреждения и аварии насосных агрегатов происходят при переходных процессах, пусках и остановках, которые в соответствии с графиком работы могут назначаться по несколько раз в сутки, а также при аварийном отключении электродвигателей от энергосистемы. Поэтому при проектировании насосных станций необходимо комплексно учитывать работу напорного тракта и технологического оборудования и назначать схемы и состав сооружений, основываясь на расчетах и анализе переходных процессов с учетом статических и динамических характеристик насосов и электродвигателей. Целью исследований является разработка рекомендаций по проектированию каскадов оросительных насосных станций, работающих по последовательной схеме без промежуточной емкости, касающихся определения параметров напорной системы и противоударных устройств. Для достижения поставленной цели необходимо решить задачу регулирования расхода в каскаде путем дросселирования напора.

Keywords

Каскад насосных станций, напор, расход, коэффициент гидравлического сопротивления, дроссельные регулирующие устройства, переходные процессы

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
bronze
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