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Fault simulation experiment device for helicopter tail transmission system

A tail drive system and fault simulation technology, which is applied in the field of helicopter tail drive system fault simulation experiment equipment, can solve problems such as vibration, strong, and threats to flight safety

Active Publication Date: 2015-04-08
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a certain bearing or gear part in the tail drive system fails, it will cause strong vibration under the high-speed rotation of the tail drive shaft, causing the parts to break and damage, resulting in the failure of the tail rotor control, which seriously threatens flight safety.

Method used

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  • Fault simulation experiment device for helicopter tail transmission system
  • Fault simulation experiment device for helicopter tail transmission system
  • Fault simulation experiment device for helicopter tail transmission system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1 Simulation of pitting faults in the inner ring of a double row tapered roller bearing.

[0052] Replace the double-row tapered roller bearing 41 supporting the driving wheel of the first reducer with a faulty bearing with pitting faults in the inner ring, start the drive motor 2, set the input speed to 1800r / min, and connect the sensor output line to the B&K data acquisition system. After the B&K data acquisition system converts the analog signal into a digital signal, the data is transmitted to the computer data acquisition software through the network cable, and the vibration acceleration time series signal is obtained. The time domain signal diagram is as follows Figure 6 .

Embodiment 2

[0053] Example 2 Simulation of Pitting Corrosion Faults in the Outer Ring of Double Row Tapered Roller Bearings

[0054] Replace the double-row tapered roller bearing 41 supporting the driving wheel of the first reducer with a faulty bearing with pitting faults on the outer ring, start the drive motor 2, set the input speed to 1800r / min, and connect the sensor output line to the B&K data acquisition system. After the B&K data acquisition system converts the analog signal into a digital signal, the data is transmitted to the computer data acquisition software through the network cable, and the vibration acceleration time series signal is obtained. The time domain signal diagram is as follows Figure 7 .

Embodiment 3

[0055] Example 3 Simulation of Roller Pitting Corrosion Fault of Double Row Tapered Roller Bearing

[0056] Replace the double-row tapered roller bearing 41 supported by the driving wheel of the first reducer 4 with a faulty bearing with roller pitting faults, start the drive motor 2, set the input speed to 1800r / min, and connect the sensor output line to the B&K data acquisition system, the B&K data acquisition system converts the analog signal into a digital signal, and then transmits the data to the computer data acquisition software through the network cable to obtain the vibration acceleration time series signal. The time domain signal diagram is as follows Figure 8 .

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Abstract

The invention discloses a fault simulation experiment device for a helicopter tail transmission system. The fault simulation experiment device comprises an experiment table, wherein the experiment table comprises a driving motor, a shaft coupling A, a first speed reducer, a second speed reducer, a shaft coupling B, a load motor and a support, wherein the first speed reducer is connected with the driving motor through the shaft coupling A; the axis of a connecting shaft for the first speed reducer and the second speed reducer is 135 degrees; the second speed reducer is connected with the load motor through the shaft coupling B; the driving motor, the shaft coupling A, the first speed reducer, a second speed reducer, the shaft coupling B and the load motor are fixedly connected to the support in sequence. Simulation experiments of typical faults such as corrosive pitting, peeling, wear, crack and gluing of a bearing and a gear, deflection of a rotor and the like in the helicopter tail transmission system can be realized. The fault simulation experiment device is widely suitable for a fault evolution mechanism, a signal characteristic extraction method, an early fault diagnosis method, a health maintaining method and strategy research of the helicopter tail transmission system.

Description

technical field [0001] The invention belongs to the technical field of a helicopter tail drive system, and in particular relates to a fault simulation experiment device for a helicopter tail drive system. Background technique [0002] As a part of the structural dynamics of the helicopter transmission system, the helicopter tail transmission system is an important subsystem of the helicopter transmission system. Torque torque, so as to realize the heading control of the helicopter, its operating status directly affects the performance of the entire transmission system and even the entire helicopter. If a certain bearing or gear part in the tail drive system fails, under the high-speed rotation of the tail drive shaft, it will cause strong vibration, break and damage the parts, and lead to the failure of the tail rotor control, which seriously threatens flight safety. How to carry out accurate condition monitoring, fault diagnosis and optimal operation on it is a significant...

Claims

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Application Information

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IPC IPC(8): G01M13/02
Inventor 蒋玲莉华登荣唐思文李学军陈安华黄良沛
Owner HUNAN UNIV OF SCI & TECH
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