Bidirectional hinge support device

Abstract

The invention discloses a bidirectional hinge support device, and belongs to fatigue test technologies for main hub connecting piece assemblies. The bidirectional hinge support device is characterized by comprising a first fixing support (1), a first joint bearing assembly (2) with a handle, a waving force measuring rod (3), a spherical roller bearing assembly (4) with a handle, an simulation paddle connector (5), a connecting pin (6), a steel wire rope pulley assembly (7), a connecting support (8), a second joint bearing assembly (9) with a handle, a swing vibration force measuring rod (10), a third joint bearing assembly (11) with a handle and a second fixing support (12). The bidirectional hinge support device has the advantages that displacement in waving and swing vibration directions can be constrained, boundary conditions of connecting pieces can be accurately simulated during tests, test beds are stable, test environments are good, the bidirectional hinge support device is low in load fluctuation, total test errors can be within 3% under the control when the tests are carried out by the aid of the bidirectional hinge support device, the tests can be continuously carried out, and the test efficiency can be doubled at least.

Description

technical field [0001] The invention belongs to the fatigue test technology of main propeller hub connector components, and relates to a two-way hinge support device. Background technique [0002] The main hub connector assembly is a typical complex key component in the helicopter structure. The loads transmitted by the blades, including centrifugal force, flapping moment, and shimmy bending moment, are transmitted to the central part through the connector assembly. Balance damper force and pitch rod force. Due to the complex shape of the structure, the severe load it bears, and the lightest possible weight, it is very important to provide an accurate fatigue test assessment environment and conduct test assessment to obtain the real fatigue performance and weak parts to provide a basis for determining its service life. [0003] In the prior art, the fatigue test of the main propeller hub connector assembly adopts the "resonance method" of mechanical vibration loading of the...

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Problems solved by technology

[0003] In the prior art, the fatigue test of the main propeller hub connector assembly adopts the "resonance method" of mechanical vibration loading of the motor at the end of a cantilever beam hinged at one end, and it is difficult to accurately simulate the bending moment distribution of the support arm, and it is difficult to apply a pitch-variable tie rod It is difficult to meet the precision requirements of centrifugal force. Part of the test connection area, especially the connection between the steel wire rope and the pulley, is seriously heated, which is likely to cause the breakage of the centrifugal force loaded steel wire rope and the connecting fixture. The test environment is noisy and affects the monitoring of the test status.

[0004] The above method cannot truly simulate the load transfer relationship, and there is a large engineering simplification. Considering this factor, the total error of the test can reach about 10%. Due to the high environmental noise and severe heating in some connection areas, the test bench needs to frequently replace fixtures and perform maintenance. processing, low test efficiency

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