泵在润滑和冷却流体供应系统中的效率

N. Velikanov, V. Naumov
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引用次数: 0

摘要

冷却和润滑是金属工件切削、钻孔和磨削等操作中最重要的过程。在加工工件时,必须向刀具操作区提供所需量的润滑和冷却液,这些润滑和冷却液由泵和连接管道提供。泵的运行基本上取决于润滑和冷却流体的特性,特别是其粘度,影响流量、压力和能源成本。本文提出了一种在提供润滑和冷却液时确定泵水力特性的算法。作为一个例子,潜水立式离心泵被认为是设计用于机器的冷却系统和提供润滑和冷却液的系统。给出了水泵扬程、耗电、效率和供水比能源成本指标的经验依赖关系。对于粘度比水高得多的液体,重新计算了得到的依赖关系。结果表明,在网络运行过程中,粘度对泵的特性有显著影响。
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Efficiency of the pump in the lubricating and cooling fluid supply system
Cooling and lubrication are the most important processes in such operations as the metal workpiece cutting, drilling and grinding. It becomes necessary in machining a workpiece to supply the lubricating and cooling fluids to the tool operation zone in the required amount, which is provided by the pump and the connecting pipeline. Pump operation essentially depends on properties of the lubricating and cooling fluid, in particular, on its viscosity affecting the flow, pressure and energy costs. The paper propose an algorithm for determining the pump hydraulic characteristics, when supplying the lubricating and cooling fluid. As an example, the submersible vertical centrifugal pumps were considered designed for using in the machines cooling systems and systems supplying the lubricating and cooling fluid. Empirical dependences are presented of the pump head, consumed power, efficiency and indicator of the specific energy cost on the water supply. The obtained dependences were recalculated for the pump operating conditions with liquids, which viscosity was much higher than that of water. It is shown that viscosity significantly changes the pump characteristics during its operation in the network.
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