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Controlling the preload adjustment system of bearings in the machine spindle model using the LabVIEW environment

Turek Paweł, Skoczyński Wacław, Stembalski Marek

Mechanik

2019

R. 92, nr 11

698--700

A test stand with a high speed spindle equipped with an active support, which provides the possibility of changing the preload of the bearings, was presented. The LabVIEW software environment was used for control. The benefits resulting from the use of the active system to reduce the amplitude of the vibration displacement of the spindle tip are presented.

Przedstawiono stanowisko badawcze z wrzecionem szybkoobrotowym wyposażonym w podporę aktywną, która umożliwia zmianę napięcia wstępnego łożysk. Do sterowania wykorzystano środowisko programowe LabVIEW. Pokazano korzyści wynikające z zastosowania układu aktywnego do redukcji amplitudy przemieszczenia drgań końcówki wrzeciona.

Development of FEM model of an angular contact ball bearing with its experimental verification

Turek Pawel, Skoczynski Waclaw, Stembalski Marek

Journal of Machine Engineering

2019

Vol. 19, No. 4

58--69

The article presents FEM model of an angular contact ball bearing used in spindle systems with active preload control. A two-dimensional replacement model for a single rolling element was developed. Its elastic characteristics were determined and the stress distribution was presented for the FEM 2D model. Based on the elastic characteristics for a single rolling element, a complete 3D bearing was modelled. The substitute model of a bearing developed in this way was used to model the spindle system. The elasticity curve of this spindle was determined. The last stage of the work involved the experimental verification of the FEM model using a custom-built test bench, in which piezoelectric elements were used to preload the bearings.

Comparison of Methods for Adjusting and Controlling the Preload of Angular-Contact Bearings

Turek P., Skoczyński W., Stembalski M.

Journal of Machine Engineering

2016

Vol. 16, No. 2

71--85

The effect of preload on the operating conditions of angular-contact bearings is described. The interdependences occurring during mutual displacements of bearing rings at different bearing contact angles are discussed. The criteria of the classification into low-speed and high-speed angular-contact bearings are presented. Selected methods of preloading angular-contact bearings are compared and discussed. Their advantages and disadvantages with regard to the active control and adjustment of the bearing system during its operation are presented. The structure of a developed test stand with a spindle assembly is described. Preliminary measurements of the behaviour of the spindle assembly during operation are reported. Conclusions are drawn and the direction for further research is indicated.