Static characteristics of a water-lubricated hydrostatic thrust bearing with a porous land region and a capillary restrictor

• Published in: Precision engineering Vol. 50; pp. 293 - 307
• Main Authors: Hanawa, Naoki, Kuniyoshi, Masanori, Miyatake, Masaaki, Yoshimoto, Shigeka
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.10.2017
• Subjects: Capillary restrictor; Hydrostatic bearing; Porous restrictor; Static characteristics; Water-lubricated bearing; Water-lubricated bearing; Static characteristics; Porous restrictor; Hydrostatic bearing; Capillary restrictor
• ISSN: 0141-6359; 1873-2372
• DOI: 10.1016/j.precisioneng.2017.06.002

•A new structure for improving characteristics of the hydrostatic bearing was proposed.•The structure of the proposed bearing combines the conventional pocket bearing with a capillary restrictor and the porous bearing.•Static characteristics of the proposed bearing were investigated numerically and experimentally. In this paper, a water-lubricated hydrostatic thrust bearing with a porous land region and capillary restrictor is proposed, and the results of theoretical and experimental investigations of its static characteristics are presented. The results showed that the water-lubricated hydrostatic thrust bearing with a porous land region had good operating characteristics; in particular, it had a high load capacity and static stiffness close to that of a porous bearing when operating with a clearance of less than 15μm, and a high load capacity and static stiffness equivalent to that of a pocket bearing when running with a clearance larger than 15μm.