基于有序造型设计的干气密封超快激光精密加工

doi:10.11896/cldb.20120238

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Abstract The core technology of dry gas seals lies in the processing of micro-level grooves. The theoretical required depth h_g is 3—10 μm and roughness of seal grooves R_a is ≤ 0.8 μm. Currently, laser processing is the mainstream slotting method, but the actual processing accuracy differs from theoretical research, affecting the actual implementation of dry gas seal. In this study, by employing an ultra-fast laser processing technology and using silicon carbide (SiC) as the experimental object, the precision machining of the groove with a fluctuating range of 2 μm in groove depth and a maximum roughness of 0.59 μm is realized. An ultra-fast laser precision machining process idea based on the benchmark of minimum laser energy corresponding to the gasification threshold of the material is proposed. Meanwhile, based on the orderly modeling design method, an orderly modeling groove structure with good orderliness and high regularity is obtained, as well as a maximum error of 2.5% in micro-scale texture spacing. This technology shortens the processing time by approximately 30% compared with the traditional process method, and realizes a low-cost, high-efficiency, and orderly modeling laser-directed processing technology suitable for practical industrial applications. A qua-lity inspection and evaluation method based on the mean square error of average multiple random inspections under the same inspection method is proposed. This method can scientifically confirm the quality and depth of slotting with dry gas seals. The research results can provide theoretical and technical support to further improve the processing and manufacturing level of dry gas seals and reduce costs.

Key words： dry gas seal ordered structure ultrafast laser quality inspection precision machining

Published: 10 March 2022 Online: 2022-03-08

CLC number:

TH117

Fund:National Natural Science Foundation of China (51805199), Natural Sciencal Foundation of Jiangsu Province (BK20191471), Key Research and Development Plan of Jiangsu Province (BE2017001), Qinglan Project in Jiangsu Province, Six Talent Peaks in Jiangsu Province (GDZB-076), “521 Project” of Lianyungang City, Talent Introduction Research Fund Project of Jiangsu Ocean University (KQ19004), and General Projects of Natural Science Research in Colleges and Universities of Jiangsu Province (19KJB460010)

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	Articles by authors
	WANG Yan
	WANG Yingyao
	XIAO Yufeng
	HU Qiong
	ZHAO Quanzhong
	FU Qiang

Cite this article:

WANG Yan,WANG Yingyao,XIAO Yufeng, et al. Ultrafast Laser Precision Machining of Dry Gas Seal Based on Ordered Texture Design[J]. Materials Reports, 2022, 36(5): 20120238-9.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.20120238 OR http://www.mater-rep.com/EN/Y2022/V36/I5/20120238

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