Some geometrical data for the elliptical bearings in artificial robots

• Autorzy: Wierzcholski K.

Identyfikatory

DOI

10.5604/12314005.1133907

• Języki publikacji: EN

Abstrakty

EN

In this paper are considered analogies between elliptical-slide hearing occurring in artificial robots and elliptical natural human joints as well artificial human femoral prosthesis. The comparisons between elliptical human femoral prosthesis and mechanical spherical bearings indicate the advantages implicated from the use ol elliptical slide bearings To prow above statement we describe some remarks referring the elliptical femoral prosthesis and natural human joints. Numerous contemporary studies and experimental measurements regarding the human hip joints indicate, that femoral head is, in fact naturally elliptical. Therefore, the femoral elliptical complete prosthesis as well half prosthesis must be better adapted to the natural hip joint with elliptical bonehead and neck of the femur. The elliptical femoral prosthesis was designed for solving the problem of the relationship between the femoral prosthesis head and the anatomical acetabulum and to minimize the various incidence namely wear protrusion and pain effects. Performed clinical tests indicate that elliptical prosthesis head have the most advanced technological shapes because are based on the anatomy and biomechanics features of the natural human hip joint The same aspects are occurring during functioning the elliptical slide bearing in artificial robots. The mechanics of elliptical-slide bearings can be taken as the appropriate shape in the respect to the operating treatment. Taking into account the hydrodynamic theory of lubrication of cooperating surfaces we must finally find pressure distributions, friction forces, friction coefficients and wear. To prepare this calculations we ought al first determine and calculate the fields of the regions of lubrication on the internal surface lying on the elliptical surfaces and on the external elliptical surface of the sleeve. Surface lubrication regions consist of the sums of spherical triangle, which are lying on the abovementioned surface. In this paper are determined the formulas for the field calculations of elliptical triangle with the three vertexes (points) for coordinates which are foreseen measured.

Słowa kluczowe

EN

artificial robots; elliptical slide bearings; comparisons with natural human joints

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2014
• Tom: Vol. 21, No. 2
• Strony: 295--302
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Wierzcholski K.

• Technical University of Koszalin, Institute of Technology and Education Śniadeckich Street 2, 75-453 Koszalin, Poland tei:[phone], fax: [phone]

Bibliografia

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