Indicator diagrams of oil free scroll vacuum pumps

Experimental test unit for obtaining indicator diagrams of a scroll vacuum pump was developed. Indicator diagrams for different pump inlet pressures and different rotation speeds of the drive shaft were obtained. The obtained results are analyzed.     

涡旋真空泵的设计与操作

本文总结了涡旋真空泵的工作原理、设计原则与经验、制造要点和使用注意事项；介绍了涡旋真空泵的设计与加工方法；讨论了涡旋盘的加工、密封的设计与选择、间隙的确定以及泵体的动平衡等问题并阐明这些问题是影响泵性能指标的几个重要因素；同时指出了涡旋真空泵使用的几个注意事项。     

Theoretical and experimental study of dry scroll vacuum pump

The rarefied gas flows through suction port, scroll clearance and discharge port are treated as leakage of dry scroll vacuum pump (DSVP). The models for predicting the above-mentioned leakage rate were derived in this paper. The model for predicting the heat transfer rate between rarefied gas and working chamber wall was also developed. Then, a general model for describing the working process of DSVP was set up according to the energy and mass conservation principle. This model can be applied to predict the performance of DSVP. The pumping speed for different suction pressures was obtained. Furthermore, the ultimate pressure and power consumption for different speeds were gotten. A good agreement between the theoretical results and experimental data was obtained. Finally, the volume ratio of prototype was changed and its influence on the performance was studied by experiment.     

干式涡旋真空泵的发展与关键问题

涡旋真空泵是一种无油容积式机械真空泵,具有结构简单,有效容积利用系数大,压缩比大,在较宽的压力范围内具有较稳定的抽速,真空度高,驱动力矩小,功率变化小,振动噪声低,可靠性高等优点。本文介绍了涡旋真空泵的发展、目前不同结构型式产品的工作原理、间隙和密封、结构特点、存在的技术问题及相应的解决方法等。     

涡旋真空泵运行工况流场的计算机模拟研究

在相关试验的基础上,通过分析软件ANSYS和C++语言编程对涡旋真空泵工作过程的流场进行了模拟分析,获得了涡旋真空泵运行工况下个月牙形封闭压缩腔内压力场分布和排气口速度场分布情况.相关结果表明,所进行的分析和研究基本上可以反映涡旋真空泵运行过程中流场分布及变化情况,从而为其设计参数及相关因素的确定提供有效的分析手段.     

Test and analysis on the working process of dry scroll vacuum pump

The general model for describing the working process of dry scroll vacuum pump (DSVP) has been presented previously by the author. The working process of DSVP can be simulated by this model. In order to verify the simulated results, the dynamic pressure measurement was introduced to DSVP. The related test and design methods were also discussed. The pressure-orbiting angle diagrams for different suction pressures and speeds were successfully recorded. A good agreement between the theoretical results and experimental data was obtained. The maximal deviation of them is less than 10%. Finally, the influence of speed, volume ratio on the working process was analyzed. The corresponding change trends were obtained. The results are helpful to deepen understanding of DSVP.     

油扩散泵的维修

本文为<实用真空技术>一书的核心章节,作者认真总结了工人师傅的丰富维修经验,理论与实践相结合,对扩散泵的维修技术作了全面、系统、深入细致的论述,对读者有参考价值.     

油扩散泵的维修

本文为<实用真空技术>一书的核心章节,作者认真总结了工人师傅的丰富维修经验,理论与实践相结合,对扩散泵的维修技术作了全面、系统、深入细致的论述,对读者有参考价值.     

油扩散泵的维修

本文为<实用真空技术>一书的核心章节,作者认真总结了工人师傅的丰富维修经验,理论与实践相结合,对扩散泵的维修技术作了全面、系统、深入细致的论述,对读者有参考价值.     

怎样选择常用真空泵油

介绍常用真空泵油的选择考虑和应用实例，供用户，有关厂商和维修人员参考。     

油扩散泵的维修

本文为<实用真空技术>一书的核心章节,作者认真总结了工人师傅的丰富维修经验,理论与实践相结合,对扩散泵的维修技术作了全面、系统、深入细致的论述,对读者有参考价值.     

油扩散泵的维修

本文为<实用真空技术>一书的核心章节,作者认真总结了工人师傅的丰富维修经验,理论与实践相结合,对扩散泵的维修技术作了全面、系统、深入细致的论述,对读者有参考价值.     

滤油机涡旋真空泵泄漏损耗及密封研究

在真空滤油机研发过程中,对其真空获得设备前置涡旋真空泵的研究是一个重要的方面。涡旋真空泵在运行过程中,动、静涡旋盘之间间隙的存在导致了气体泄漏损耗,该因素会影响涡旋真空泵的极限真空度及其工作性能。分析了涡旋真空泵的径向泄漏及切向泄漏,计算了泄漏消耗的功率,说明了密封条原理和特点,提出了径向间隙和轴向间隙的密封措施,对提高涡旋真空泵抽速、改善其机构性能方面具有重要理论意义和工程实用价值,涡旋真空泵将在油处理行业得到进一步推广应用。     

油扩散泵的维修(连载)

本文为《实用真空技术》一书的核心章节,作者认真总结了工人师傅的丰富维修经验,理论与实践相结合,对扩散泵的维修技术作了全面、系统、深入细致的论述,对读者有参考价值.     

油扩散泵的维修

本文为<实用真空技术>一书的核心章节,作者认真总结了工人师傅的丰富维修经验,理论与实践相结合,对扩散泵的维修技术作了全面、系统、深入细致的论述,对读者有参考价值.     

油扩散泵的维修

本文为《实用真空技术》一书的核心章节,作者认真总结了工人师傅的丰富维修经验,理论与实践相结合,对扩散泵的维修技术作了全面、系统、深入细致的论述,对读者有参考价值。     

油扩散泵的维修

本文为《实用真空技术》一书的核心章节,作者认真总结了工人师傅的丰富维修经验,理论与实践相结合,对扩散泵的维修技术作了全面、系统、深入细致的论述,对读者有参考价值。     

油扩散泵的维修

本文为《实用真空技术》一书的核心章节,作者认真总结了工人师傅的丰富维修经验,理论与实践相结合．对扩散泵的维修技术作了全面、系统、深入细致的论述,对读者有参考价值。     

油扩散泵的维修

本文为<实用真空技术>一书的核心章节,作者认真总结了工人师傅的丰富维修经验,理论与实践相结合,对扩散泵的维修技术作了全面、系统、深入细致的论述,对读者有参考价值.     

油扩散泵的维修

本文为<实用真空技术>一书的核心章节,作者认真总结了工人师傅的丰富维修经验,理论与实践相结合,对扩散泵的维修技术作了全面、系统、深入细致的论述,对读者有参考价值.