设计研究 Design&Research
迷宫活塞压缩机活塞组件精确导向技术研究（二）
-精确电磁导向技术
程军明，曾翔君，余小玲，冯全科
(西安交通大学能源与动力工程学院，陕西西安710049)
[摘要]：现行速富式活塞压缩机在工作过程中，活塞与气缸之间保持高度的对中性难度较大，因而活塞与气缸墅之间的设计间隙取得较大，造成容积效率低下，尤其是在较高压差下（10MPa以上），容积效率仅有50%。固此，实现活塞的精确定心，减少活塞与气缸壁之阅的间隙，大幅度提高客积效率，成为速宫压缩机研究的最追切的问题。提出了一种以电磁力实现活塞精确定心的新技术，将目前的悬臂活塞导向机构改为两端简支的活塞导向机构。模拟结果表明，通过此电磁定
心方案，可将活塞的径向偏心位移由目前减小至0.01mm以下。[关键词]：宫压缩机；活塞导向技术；精确定心；客积效率
中图分类号：TH457
文献标志码：A
文章编号：10062971(2015)06~000705
Research on Piston Assemble Precise GuidingTechnology of Labyrinth-pistonCompressor
The AccurateElectromagneticGuidingTechnology
CHENG Jun-ming, ZENG Xiang-jun, YU Xiaoling, FENG Quan-ke(School of Energy and Power, Xi'an Jiaotong University, Xi'an 710049, China)
Abstract:ln current, it is very difficult to keep a small uniform radial clearance between the piston and the cylinder when the labyrinth piston compressor is working, thus the volumetric efficiency is generally lower than that of the piston compressor. Especial-ly, the volumetric efficiency is only 50% under the high pressure difference (above 10 MPa). Therefore, how to realize the piston centering precisely, reduce the clearance between piston and cylinder, and increase the volume efficiency greatly become the most urgent problem for the labyrinth piston compressor development. This paper proposed a new piston centering technology achieved by electromagnetic force, This technology wll make the piston supported at both ends instead of traditionally being a cantilever. The simulation results show that the piston radial eccentric displacement could be controlled below O.01mm by this electromagnetic cen tering scheme.
Key words: labyrinth piston compressor; piston guiding technology; accurate centering; volume efficiency
1引信
非接触式迷宫活塞压缩机作为生产线上的心脏设备，已广泛应用于炼油、化工、制药、啤酒饮料等领域各种气体的压缩与输送。与传统的往复压缩机相比，迷宫压缩机在应用上最大优势在
收稿日期：2015-01-04
量2015年06期（总第254期）
于其能供应保证生产出来的介质气体绝对干净，特别适用于对气体洁净度有严格要求的化工装置、制药企业及食品生产等领域。
然而，迷宫式活塞压缩机一直以来就存在着应用上的局限性，由于气缸与活塞之间采用迷宫密封方式，要求活塞与气缸之间具有高度的对中性，才能满足密封的要求。但在现行的迷宫式活
压缩机技术_107 Compresson