METHOD FOR OPTIMIZING GEOMETRY OF THE PROFILE OF SINGLE-SCREW HYDRAULIC MACHINE WORKING ELEMENTS Russian patent published in 2000 - IPC

FIELD: oil and mining industries, general mechanical engineering. SUBSTANCE: method involves including factors of geometry in calculations and calculating contact stresses in working elements. Novelty is that tooth shape factor C_e = r_c/e is chosen depending on off-centroid factor C_o = r/e and on displacement of original contour of rack C_Δ = Δx/e by maximum of criterion of wear resistance П_w.r. which is, essentially, ratio of square root of relative reduced curvature radius to relative rate of slip of rotor and stator profiles where e is engagement eccentricity, M; D_cntr is contour diameter, m; r is equidistance radius, m; Δx is displacement of rack original contour, m; e is distance from point of contact to engagement pole, m, ρ is reduced radius of profile curvature. EFFECT: improved reliability and wear resistance of working elements. 2 cl, 10 dwg