Unlock instant, AI-driven research and patent intelligence for your innovation.

Active silencing system applied to aero-engine test room

A technology for aero-engines and test rooms, which is applied to sound-generating devices and instruments, and can solve problems such as limited noise reduction effects

Pending Publication Date: 2022-01-14
中航长沙设计研究院有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using traditional passive noise reduction measures, the noise reduction effect is limited, especially for low frequency noise

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Active silencing system applied to aero-engine test room

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. For the convenience of description, if the words "up", "down", "left" and "right" appear in the following, it only means that the directions of up, down, left and right are consistent with the drawings themselves, and do not limit the structure.

[0014] like figure 1 As shown, an active noise reduction system applied to an aero-engine test room provided by this embodiment is installed in the test room 2, which includes a sound wave generator 3, a sound wave receiver 5, a noise source receiver 6 and a controller 7.

[0015] One side of the test room 2 is provided with an air inlet 8, and the other side is provided with an exhaust air passage 9, and the sound-absorbing element 1 inside the air inle...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an active silencing system applied to an aero-engine test room. The active silencing system comprises a controller, a noise source receiver used for receiving noise generated by the aero-engine and feeding back a signal to the controller, sound wave generators used for receiving an instruction of the controller and sending out sound waves with the phase opposite to that of the noise of the aero-engine, and sound wave receivers used for receiving sound waves emitted by the sound wave generator and feeding back signals to the controller wherein a plurality of sound wave receivers and a plurality of sound wave generators are arranged in the test room. Compared with the prior art, the active silencing system has the advantages that sound waves with opposite phases and the same frequency and amplitude are generated to counteract a noise source of the aero-engine, so that the purpose of active silencing is achieved, and the environment-friendly requirement is met.

Description

technical field [0001] The invention relates to the technical field of aero-engine / gas turbine testing, in particular to an active noise reduction system applied to an aero-engine testing room. Background technique [0002] Aeroengine / gas turbine test is an indispensable work link in the development process of aeroengine. The test will generate a large noise, up to 150dB. With traditional passive noise reduction measures, the noise reduction effect is limited, especially for low frequency noise. As environmental protection requirements become higher and higher, it is necessary to adopt new active noise reduction technology to achieve the purpose of noise reduction. Contents of the invention [0003] The object of the present invention is to provide an active noise reduction system applied to the test room of an aero-engine, which is used to control the noise generated during the test. [0004] The technical solution of the present invention is: an active noise reduction...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/178
CPCG10K11/178G10K11/1781
Inventor 陈艳萍岳育元
Owner 中航长沙设计研究院有限公司