流量自调式射流真空发生器的研究

【作者】 赵萍萍；

【导师】 李小宁；

【作者基本信息】 南京理工大学 ， 机械设计及理论， 2006， 硕士

【摘要】 射流式真空发生器以其体积小、质量轻、真空度高、价格低、安装方便等优点正日益广泛地应用于工业自动化生产中。但是，目前传统的射流式真空发生器在工作过程中始终以同一较大的气流流通面积供给压缩空气，存在着空气消耗量大的缺点。在能源紧缺的今天，节能研究具有紧迫性和现实意义。为了克服传统射流式真空发生器的缺点，节约能源，研究一种供气量可自动调节的射流式真空发生器具有重要的实际意义和应用价值。 本文研究了一种新型的流量自调式射流真空发生器，通过减少其内部拉瓦尔喷管的气流流通面积来实现减少耗气量。完成的工作主要包括以下几个方面：(1) 在对流量自调式射流真空发生器功能需求分析的基础上，完成了流量自调式射流真空发生器的结构研究；(2) 建立了流量自调式射流真空发生器的理论模型并进行了动态仿真，为试验提供了参考；(3) 对流量自调式射流真空发生器进行了性能测试，并且与传统射流式真空发生器进行了试验对比。 研究表明，与传统的射流式真空发生器相比，流量自调式射流真空发生器在相同工作条件下能减少耗气量，证明了流量自调式射流真空发生器工作原理的可行性。更多还原

【Abstract】 The vacuum ejector is widely used in industrial automation increasingly because of its unique advantages such as small size, light weight, high vacuum level, low price, convenient installation and so on. However, the compressed air pass the same large area of Laval nozzle in the traditional vacuum ejector all through the working process, so its large shortcoming is high compressed air consumption. There is a lack of energy resource nowadays and it’s important to do energy conservation research. Therefore, it’s necessary to develop a new kind of vacuum ejector, which can reduce the amount of compressed air in order to save the energy resource.The research tries to work out a new type vacuum ejector, which can reduce the compressed air consumption by means of reducing the area of Laval nozzle. The main contents in this dissertation are summarized as follows: (1) Doing structure research on the new type vacuum ejector on the basis of functional analyses. (2) Building the theory model of the new type vacuum ejector and simulating according to the model. The simulated results can provide reference for the experiment. (3) Making experiment on the new type vacuum ejector to test its performance and making contrast to the traditional vacuum ejector.The results indicate that the new type vacuum ejector can reduce the compressed air consumption compared with the traditional vacuum ejector in the same working condition. It proves the feasibility of the working principle used in the new type vacuum ejector.更多还原