Helicopter shaft pin type fixed horizontal tail mounting angle adjusting method
An adjustment method and a technology of installation angle, applied in the direction of aircraft assembly, etc., can solve the problems such as the low height of the helicopter's horizontal tail surface, the inapplicability of the adjustment of the installation angle of the helicopter pin-type fixed horizontal tail, etc., to improve the flight quality and control quality effect
Inactive Publication Date: 2021-02-26
HARBIN
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Problems solved by technology
However, due to the low height of the helicopter's flat tail surface and the small space, it is not suitable for helicopter structures.
[0005] In summary, none of the above-mentioned patents can be applied to the adjustment of the installation angle of the helicopter pin type fixed horizontal tail
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Embodiment 1
[0050] The horizontal tail of a certain helicopter adopts the pivot pin type fixed installation form. The installation angle of the horizontal tail needs to be adjusted based on the current installation angle of the horizontal tail according to the requirements of the scientific research flight test:
[0051] Step one: in figure 1 In the view shown, with the intersection point O as the center of rotation, the angle at which the horizontal tail installation angle needs to be rotated counterclockwise is θ=1°19′.
[0052] Step 2: Calculate the thickness of the shoulders of the upper bushing 2 and the lower bushing 3 of the equal-thickness shoulders and the dimensional change of the outer diameter of the bushing wall according to the rotation angle θ.
[0053] Step 3: According to the amount of change, make the upper eccentric bushing 4 of the inclined shoulder and the lower bush 5 of the inclined shoulder. The wall thickness and shoulder thickness of the eccentric bushing with ob...
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The invention belongs to the technical field of structural design of helicopters, and discloses a shaft pin type fixed horizontal tail mounting angle adjusting method for a helicopter. The angle valueof the horizontal tail mounting angle can be adjusted as required, the shoulder inclination angles of the oblique shoulder eccentric upper bushing and the oblique shoulder eccentric lower bushing andthe wall thickness of the bushings are calculated and manufactured on the premise that the concentricity of the shaft pin passing holes is guaranteed. And the concentric bushings of the equal-thickness convex shoulders at the joint of the horizontal tail of the helicopter and the helicopter body structure which are fixed in a shaft pin mode are dismantled. And chambering is carried out at the installation position of the concentric bushing with the equal-thickness shoulder, and then the eccentric bushing with the inclined shoulder is embedded. The eccentric bushing with the inclined shoulderis divided into an upper bushing and a lower bushing. The two inclined convex shoulder eccentric bushings positioned at the upper part are symmetrically distributed at two sides of the machine body; and the two inclined convex shoulder eccentric bushings positioned at the lower part are also symmetrically distributed on the two sides of the machine body. And the upper and lower inclined convex shoulder bushings on each side need to be concentric during installation, so that the shaft pin can be conveniently connected with a machine body structure through the concentric holes of the bushings.
Description
technical field [0001] The technical field of structural design of the present invention, in particular relates to a method for adjusting the installation angle of a helicopter pin type fixed flat tail. Background technique [0002] The Chinese invention patent application with the application number 201110122952.7 discloses an empennage with an adjustable mounting angle, including a horizontal empennage of a T-shaped empennage, a vertical empennage of a T-shaped empennage, and an installation angle adjustment mechanism, wherein the horizontal empennage is passed through the installation angle adjustment mechanism. Connect with vertical tail. Although this installation angle adjustment mechanism can adjust the installation angle of the wing, its structure is complicated, and the manufacturing cost is higher, and it is not suitable for the helicopter structure because the height of the helicopter plane tail surface is low and the space is narrow. [0003] The Chinese utility...
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IPC IPC(8): B64F5/10
CPCB64F5/10
Inventor 温青山郝刚勇荆天冬刘永胜
Owner HARBIN