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A device for ground resonance test of coaxial twin-rotor helicopter

A coaxial dual-rotor and helicopter technology, which is applied to rotorcraft, motor vehicles, transportation and packaging, etc., can solve the problem of rare resonance of dual-rotor helicopters

Active Publication Date: 2019-12-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there are many domestic studies on the ground resonance of single-rotor helicopters with tail rotors, and the experimental research on the resonance of dual-rotor helicopters is extremely rare, and there is a lack of test equipment for dual-rotor helicopter resonance.

Method used

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  • A device for ground resonance test of coaxial twin-rotor helicopter
  • A device for ground resonance test of coaxial twin-rotor helicopter
  • A device for ground resonance test of coaxial twin-rotor helicopter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The present invention provides a kind of device that is used for coaxial double-rotor helicopter ground resonance test, such as figure 1 As shown, it includes: upper rotor blade 1, upper rotor hub 2, upper rotor hub shaft 3, upper rotor drive gear 4, motor 5, box 6, spring 7, damper 8, support plate 9, universal joint 10. Chassis 11, bracket 12, nut 13, bolt 14, bearing 15, pin 16, counterweight 17, lower rotor hub shaft 18, lower rotor drive gear 19, motor bevel gear 20, motor fixed baffle 21, lower rotor propeller Hub 22, lower rotor blade 23.

[0033] The base plate 11 is fastened to four brackets 12 through nuts 13 and bolts 14. The brackets 12 support the base plate 11, and a spring 7, a damper 8 and a universal joint 10 are installed between the base plate 11 and the support plate 9. Among them, the damper is used to measure the damping of the whole experimental device at different rotor speeds.

[0034] The support plate 9 is connected to the box body 6 through...

Embodiment 2

[0040] The present invention provides a kind of device that is used for coaxial double-rotor helicopter ground resonance test, such as figure 2 As shown, it includes: upper rotor blade 1, upper rotor hub 2, upper rotor hub shaft 3, upper rotor drive gear 4, motor 5, box 6, spring 7, damper 8, support plate 9, universal joint 10. Chassis 11, bracket 12, nut 13, bolt 14, bearing 15, pin 16, counterweight 17, lower rotor hub shaft 18, lower rotor drive gear 19, motor bevel gear 20, motor fixed baffle 21, lower rotor propeller Hub 22, lower rotor blade 23, inner core 24, shell 25, spring 27, connection point 28.

[0041]The base plate 11 is fastened to four brackets 12 through nuts 13 and bolts 14. The brackets 12 support the base plate 11, and a spring 7, a damper 8 and a universal joint 10 are installed between the base plate 11 and the support plate 9. Among them, the damper is used to measure the damping of the whole experimental device at different rotor speeds.

[0042] T...

Embodiment 3

[0048] The present invention provides a kind of device that is used for coaxial double-rotor helicopter ground resonance test, such as image 3 As shown, it includes: upper rotor blade 1, upper rotor hub 2, upper rotor hub shaft 3, upper rotor drive gear 4, motor 5, box 6, spring 7, damper 8, support plate 9, universal joint 10. Chassis 11, bracket 12, nut 13, bolt 14, bearing 15, pin 16, counterweight 17, lower rotor hub shaft 18, lower rotor drive gear 19, motor bevel gear 20, motor fixed baffle 21, lower rotor propeller Hub 22 , lower rotor blade 23 , inner core 24 , shell 25 , filling material 26 .

[0049] The base plate 11 is fastened to four brackets 12 through nuts 13 and bolts 14. The brackets 12 support the base plate 11, and a spring 7, a damper 8 and a universal joint 10 are installed between the base plate 11 and the support plate 9. Among them, the damper is used to measure the damping of the whole experimental device at different rotor speeds.

[0050] The sup...

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Abstract

The invention discloses a device for ground resonance test of a coaxial dual-rotor helicopter, and relates to the field of aircraft test devices. The device comprises upper rotor propeller blades (1), an upper rotor propeller boss (2), an upper rotor boss shaft (3), an upper rotor driving gear (4), an electric motor (5), a box body (6), a spring (7), a damper (8), a supporting plate (9), a cardan joint (10), a chassis (11), brackets (12), bearings (15), pins (16), a counter weight (17), a lower rotor boss shaft (18), a lower rotor driving gear (19), an electric motor bevel gear (20), a lower rotor propeller boss (22) and lower rotor propeller blades (23). The device disclosed by the invention can simulate the resonance effect of the coaxial dual-rotor helicopter, and a test device for researching the resonance of the coaxial dual-rotor helicopter is provided.

Description

technical field [0001] The invention relates to the field of aircraft test devices, in particular to a device for ground resonance tests of coaxial dual-rotor helicopters. Background technique [0002] Compared with single-rotor helicopters with tail rotors, coaxial twin-rotor helicopters have many advantages: (1) Compact structure and small dimensions, because twin-rotor helicopters have no tail rotors, no need to install long tail beams, and the length of the fuselage can also be greatly reduced. Shortening; (2) strong lift, the dual-rotor helicopter has two sets of rotors to generate lift, and the diameter of each set of rotors can also be shortened; (3) good flight stability, the body parts are compactly arranged at the center of gravity of the helicopter; (4) control efficiency , High hovering efficiency, coaxial helicopter aerodynamic symmetry. Dual-rotor helicopters have been more widely used because of their superior performance, and the test demand for dual-rotor h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C27/10B64C27/12
CPCB64C27/10B64C27/12
Inventor 乔继周马胜明张英杰韩东
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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