• CN:11-2187/TH
  • ISSN:0577-6686

›› 2008, Vol. 44 ›› Issue (9): 241-247.

• 论文 • 上一篇    下一篇



  1. 南京理工大学机械工程学院
  • 发布日期:2008-09-15

Flow Self-regulated Jet Vacuum Ejector

TENG Yan;LI Xiaoning;ZHAO Pingping   

  1. School of Mechanical Engineering, Nanjing University of Science and Technology
  • Published:2008-09-15

摘要: 针对目前使用的真空发生器存在的耗能大的局限性,提出一种流量自调式射流真空发生器的总体技术方案。该方案采用磁性驱动方案和真空反馈自适应控制方案,通过控制喷管喉部的有效流通断面积调节真空发生器的供气流量,以满足快速响应和节能的要求。建立流量自调式射流真空发生器的气体流动模型和运动模型并进行仿真,同时,研究弹性系数这一主要设计参数对流量自调式射流真空发生器工作性能的影响规律,为优化设计提供理论依据。对所设计的真空发生器进行试验研究表明,该真空发生器具有真空响应速度快和空气消耗量低的特性。

关键词: 磁性驱动, 节能, 空气消耗量, 真空发生器, 真空反馈

Abstract: Jet vacuum ejectors currently used have a defect of large air consumption. To solve this problem, a new type of jet vacuum ejector with flow self-regulation is presented. In the new type of vacuum ejector, magnetic actuating and vacuum feedback adaptive control are used, by which the air input is regulated through adjusting the nozzle’s effective cross-section so as to reduce the air consumption and meet its rapid response requirement. On this basis, the pneumatic kinetic models of vacuum ejector are proposed and put into simulation. Then, the affection of elastic coefficient of the spring on the working characteristics of the new vacuum ejector is investigated, which could provide the theoretical basis for the optimization of the new ejector. Experimental results have shown that this new type of vacuum ejector not only saves air consumption but has a quick vacuum response speed.

Key words: Air consumption, Energy saving, Magnetic actuating, Vacuum ejector, Vacuum feedback