摘  要
本文设计的是为冶金工业中用来提高镐基合金性能的设备提供必要条件的系统——真空获得系统，设计主要包括：溶炼室真空机组、熔渗室真空机组、快淬室真空机组的设计等等。
真空获得技术是一切真空应用的技术基础,真空获得设备关系到所有真空应用设备的运行和使用。为了满足设备可以在高真空的条件下工作，所以选择合适的机械泵，罗茨泵，分子泵组成合适的真空机组，使各真空室达到工作的真空条件。
在设计中，为了使溶炼室、熔炼室达到高真空选择机械泵与罗茨泵组成前级泵机组进行预抽达到粗真空，分子泵为高级泵即主抽泵。快淬室在低真空条件下工作选择机械泵、罗茨泵进行抽真空。密封方面，采用了机械密封，密封性能可靠。
关键词：真空机组；机械泵；罗茨泵；分子泵；粗真空；高真空
Abstract
This thesis is for the metallurgical industry to improve the Ho-based alloys to provide the necessary conditions for the system equipment——Vacuum access system，Design includes：Smelting chamber vacuum unit、Infiltration chamber vacuum unit、Quenching chamber vacuum unit design and others。
Vacuum access to technology is the technical foundation for all vacuum applications，Vacuum obtain equipment related to the operation of all vacuum equipment and the use of。To meet the device can work under high vacuum conditions，So choose a suitable mechanical pumps, Roots pumps, molecular composition of a suitable vacuum pump unit，So that the work of the vacuum chamber to vacuum conditions。
In the design，In order to smelting room, select the melting chamber to high vacuum mechanical pump and Roots pump before the pump unit composed of pre-pumping to rough vacuum，High molecular pump that is the main pumping pumps。Quenched room to work in low vacuum conditions select mechanical pump, Roots vacuum pump。Seal, the use of mechanical seals, sealing performance and reliable。
 
Keywords：Vacuum unit; mechanical pump; Roots pump; molecular pump;
 rough vacuum; high vacuum
目  录