Integral journal bearings (Kalsi Seals Handbook, （积分杂志轴承(Kalsi海豹手册,）.pdfVIP

Kalsi Seals Handbook Chapter D15 Integral journal bearings Revision 3 February 22, 2016 Individual chapters of the Kalsi Seals Handbook are periodically updated. To determine if a newer revision of this chapter exists, please visit /seal-handbook.htm . NOTICE: The information in this chapter is provided under the terms and conditions of the Offer of Sale, Disclaimer, and other notices provided in the front matter of this handbook. Document 3086 © 2016 Kalsi Engineering, Inc. All rights reserved. Integral journal bearings Chapter D15 Page 1 1. Introduction This chapter provides experience based guidance for designing the integral, machined in place journal bearing surfaces that are found on shaft guided pressure compensation pistons and laterally translating seal carriers which incorporate Kalsi Seals. The general principles are also applicable to other bearing locations in equipment such as mud motor sealed bearing assemblies and hydraulic swivels. 2. Journal bearing clearance The objective of this chapter The journal bearing found on shaft guided pressure compensation pistons (Chapter D14) and laterally translating seal carriers (Chapter D16) should fit the shaft closely so the component can follow lateral shaft motion, such as shaft deflection and runout. The ability of the component to follow lateral shaft motion:  Isolates the Kalsi Seal from gross compression changes, and  Prevents metal to metal contact between the shaft and the extrusion gap. In striving to have the journal fit the shaft closely, one must avoid shaft to journal binding that may occur due to component pressure breathing, differential thermal expansion, shaft deflect