RU2012156125A - ON-BOARD PROTECTIVE DEVICE FOR ENGINE FROM INJURY OF AN EXTERNAL OBJECT - Google Patents

Abstract

An onboard motor protective device against ingress of foreign objects, comprising a movable lower panel, on the axis of which there are two panels capable of oscillating movements alternately with an oscillation period T, characterized in that the movable lower panel is made with a relative length of the lower panel, with a relative width of the bottom panel, capable of swiveling to the relative length of the extension of the lower th panel, equal to from 0.6 to 0.3, with a proportional change in the relative height of the bottom edge of the air intake from the surface of the airfield from 0.8 to 1.25, is set at an angle α = 20 ° -35 ° relative to the axis of the front edge of the air intake, and has in the rear part two panels with a relative width located on a relative length, capable of oscillating alternately upward at an angle α = 20-30 ° relative to the longitudinal axis of the lower panel with a period of oscillation T = 2.0-5.0 s, where λ - extension length of the bottom panel, m; l is the length of the bottom panel, m; b is the width of the bottom panel, m; C is the length of the panels, m; d is the width of the panels, m; N is the height of the bottom edge of the air intake from the surface of the airfield, m; is the equivalent diameter of the entrance to the air intake, m; And - the height of the air intake, m; In - the width of the air intake, m

Claims (1)

An onboard motor protective device against ingress of foreign objects, comprising a movable lower panel, on the axis of which there are two panels capable of oscillating movements in turn with an oscillation period T, characterized in that the movable lower panel is made with a relative length of the lower panel $$\overline{l}=\raisebox{1ex}{$l$}\!\left/ \!\raisebox{-1ex}{$D_{E\mathrm{TO}\mathrm{AT}}$}\right.=0.9-1.05$$

, with the relative width of the bottom panel $$\overline{b}=\raisebox{1ex}{$b$}\!\left/ \!\raisebox{-1ex}{$D_{E\mathrm{TO}\mathrm{AT}}$}\right.=0.9-\mathrm{1,1}$$

capable of swiveling to the relative length of the extension of the lower panel through articulated joints with the actuator stem rigidly mounted on the air intake housing $$\overline{\lambda }=\raisebox{1ex}{$\lambda $}\!\left/ \!\raisebox{-1ex}{$D_{E\mathrm{TO}\mathrm{AT}}$}\right.$$

equal to from 0.6 to 0.3, with a proportional change in the relative height of the bottom edge of the intake from the surface of the airfield $$\overline{H}=\raisebox{1ex}{$H$}\!\left/ \!\raisebox{-1ex}{$D_{E\mathrm{TO}\mathrm{AT}}$}\right.$$

from 0.8 to 1.25, installed at an angle α = 20 ° -35 ° relative to the axis of the front edge of the air intake, and has two panels with a relative width in the rear $$\overline{d}=d/b=0.4-0.5$$

located at relative length $$\overline{c}=c/l=0.15-0.35$$

capable of oscillating movements alternately upward at an angle α _n = 20-30 ° relative to the longitudinal axis of the lower panel with a period of oscillation T = 2.0-5.0 s, where λ is the extension length of the lower panel, m; l is the length of the bottom panel, m; b is the width of the bottom panel, m; C is the length of the panels, m; d is the width of the panels, m; H - the height of the bottom edge of the air intake from the surface of the airfield, m; $$D_{E\mathrm{TO}\mathrm{AT}}=2\sqrt{(A*B)/\pi }$$

- equivalent diameter of the entrance to the air intake, m; And - the height of the air intake, m; In - the width of the air intake, m