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气悬浮离心制冷压缩机轴承承载特性分析

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  • Key Words:制冷压缩机;轴承;承载特性;分析

  • Abstract:离心制冷压缩机是离心式冷水机组的核心设备,对气悬浮离心制冷压缩机轴承承载特性进行分析具有重要意义。在制冷剂流态分析的基础上,采用计算流体动力学软件,计算得到气悬浮离心制冷压缩机轴承的气膜压力分布及承载力。通过分析确认:工质为R134a制冷剂时,气悬浮离心制冷压缩机轴承内部的流态比空气环境复杂,属于层流、湍流共存的混合流态;轴承气膜压力分布规律在R134a制冷剂环境中与在空气环境中基本相同,但是最大气膜压力在R134a制冷剂环境中大于在空气环境中,最小气膜压力在R134a制冷剂环境中小于在空气环境中;在R134a制冷剂环境中,随着偏心率增大,主轴转速提高,轴承宽度增大,最大气膜压力和最小气膜压力都会增大,轴承的承载能力提高。

  • Volume:v.59;No.677

  • Issue:01

  • Translation or Not:no

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