Тип публикации: статья из журнала
Год издания: 2021
Идентификатор DOI: 10.3390/math9222949
Ключевые слова: adaptive function, compliance, displacement compensator, load characteristics, lubricant flow rate, quality of dynamics, stepped hydrostatic thrust bearing
Аннотация: 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 com-parison with throttle thrust bearings, they have a high compliance. It is preferable that, in addition to the main bearing function, a modern hydrosПоказать полностьюtatic bearing has the ability to provide low (including negative) compliance for the implementation of an adaptive function in order to actively compen-sate for the deformation of the machine resilient system, thereby increasing the accuracy of metal-working. 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 op-erate 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. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Журнал: Mathematics
Выпуск журнала: Vol. 9, Is. 22
Номера страниц: 2949
ISSN журнала: 22277390
Издатель: MDPI