Theoretical Disquisition on the Static and Dynamic Characteristics of an Adaptive Stepped Hydrostatic Thrust Bearing with a Displacement Compensator

Vladimir Kodnyanko, Andrey Kurzakov, Olga Grigorieva, Maxim Brungardt, Svetlana Belyakova, Ludmila Gogol, Alexey Surovtsev and Lilia Strok
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Vladimir Kodnyanko: Polytechnic Institute, Siberian Federal University, 660079 Krasnoyarsk, Russia
Andrey Kurzakov: Polytechnic Institute, Siberian Federal University, 660079 Krasnoyarsk, Russia
Olga Grigorieva: Polytechnic Institute, Siberian Federal University, 660079 Krasnoyarsk, Russia
Maxim Brungardt: Polytechnic Institute, Siberian Federal University, 660079 Krasnoyarsk, Russia
Svetlana Belyakova: Polytechnic Institute, Siberian Federal University, 660079 Krasnoyarsk, Russia
Ludmila Gogol: Polytechnic Institute, Siberian Federal University, 660079 Krasnoyarsk, Russia
Alexey Surovtsev: Polytechnic Institute, Siberian Federal University, 660079 Krasnoyarsk, Russia
Lilia Strok: Polytechnic Institute, Siberian Federal University, 660079 Krasnoyarsk, Russia

Mathematics, 2021, vol. 9, issue 22, 1-19

Abstract: Stepped hydrostatic thrust bearings used in metal-cutting machines are characterized by high load capacity and damping, which ensure the stable operation of structures. However, in comparison with throttle thrust bearings, they have a high compliance. It is preferable that, in addition to the main bearing function, a modern hydrostatic bearing has the ability to provide low (including negative) compliance for the implementation of an adaptive function in order to actively compensate for the deformation of the machine resilient system, thereby increasing the accuracy of metalworking. This paper considers the design of a stepped hydrostatic thrust bearing, which, in order to reduce the compliance to negative values, features a technical improvement consisting of the use of an active displacement compensator on an elastic suspension. In this paper, the results of mathematical modeling and theoretical research of stationary and non-stationary modes of operation of the adaptive thrust bearing are presented. The possibility of a significant reduction in the static compliance of the structure, including the negative compliance values, is shown. It was found that negative compliance is provided in a wide range of loads, which can be up to 80% of the range of permissible bearing loads. The study of the dynamic characteristics showed that with a targeted selection of parameters that ensure optimal performance, the adaptive thrust bearing is able to operate stably in the entire range of permissible loads. It has been established that an adaptive stepped hydrostatic thrust bearing with a displacement compensator has a high stability margin, sufficient to ensure its operability when implementing the adaptive function.

Keywords: stepped hydrostatic thrust bearing; adaptive function; displacement compensator; load characteristics; compliance; lubricant flow rate; quality of dynamics (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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