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Main blade connecting arm for test table

A technology for connecting arms and main blades, which is applied in the field of inspection of helicopter main blades, can solve the problems of time-consuming and high cost, and achieve the effect of saving refitting time

Active Publication Date: 2015-09-02
HARBIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the rotation of the rotor, the main blade generates a huge centrifugal force, and the hub is subjected to the centrifugal force of the blade, which has very strict requirements on the stiffness and strength of the hub joint. Redesigning the joint form requires a strength and stiffness test to check whether the joint form can Withstand the huge centrifugal force generated by the main propeller blades, which is time-consuming and costly

Method used

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  • Main blade connecting arm for test table
  • Main blade connecting arm for test table
  • Main blade connecting arm for test table

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0028] as in the present invention Figure 1-13 , the main blade connecting arm of the test bench of the present invention is mainly used for the connection and installation of the three-blade hub helicopter rotor system and the new blade, and is divided into two parts: the connecting arm (1) and the blade mounting pin:

[0029] The connecting arm (1) is processed from a piece of metal, one end of the connecting arm (1) is installed on the propeller hub, and a propeller hub mounting hole of the same size is processed on the connecting arm (1) according to the propeller mounting hole of the propeller hub, In order to adapt to the installation of the propeller hub, the corners of the upper and lower surfaces of the hub mounting hole of the connecting arm (1) need to form a certain angle with the surface of th...

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PUM

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Abstract

The invention discloses a main blade connecting arm for a test table. The main blade connecting arm is divided into two parts including a connection arm (1) and a blade mounting pin. The connecting arm (1) is provided with a propeller hub mounting hole, a blade mounting hole and a yaw damper mounting hole. The blade mounting pin includes a shaft (2), a brake pin (201), a brake block (202), a spring (203), a slide block (204), a pin (205). According to the invention, a new blade can be mounted on a prior propeller hub in a transitional manner and no re-design of the propeller hub is needed. Therefore, time for refitting a rotor wing system of a blade dynamic balance test table can be saved by half.

Description

technical field [0001] The invention belongs to the inspection field of helicopter main blades, and in particular relates to a main blade connecting arm for a test bench. Background technique [0002] The main blade dynamic balance test bench is a test device for dynamic balance inspection of the main blade of the helicopter. The part connected to the main blade is the hub, and the form of the hub joint determines the type of the main blade of the helicopter. For the dynamic balance test of the main blade, three blades are used for loading at the same time, and the three blades are the standard blade, the accompanying blade and the blade to be tested. Only one main blade is tested each time, and the measured data of the main blade to be tested is compared with the standard blade. Modern helicopters usually use more than 4 main blades. Therefore, when building the main blade dynamic balance test bench, it is necessary to modify or redesign the rotor system installed on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M1/02
Inventor 孙艳升姜志金
Owner HARBIN
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