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Flowing noise measuring device

A measurement device and flow noise technology, applied to measurement devices, vibration measurement in fluid, measurement of vibration and other directions, can solve the problem of measurement accuracy affecting positioning devices, etc., to achieve reliable end face sealing and axial sealing, easy installation, sealing good effect

Inactive Publication Date: 2013-05-08
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of this invention is to provide a positioning installation flow noise measurement device for the hydrophone used to measure the flow-induced noise of the centrifugal pump by the pipeline method, so as to solve the influence of the fluid flow and the external sound field on the measurement accuracy of the hydrophone and the sealing of the positioning device problem, so as to complete the measurement of the sound source characteristics of the centrifugal pump

Method used

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Embodiment Construction

[0013] exist figure 1 Among them, the two-hydrophone cross-spectrum measurement method based on the four-terminal network model is used for measurement. figure 1 The measuring point positions on the inlet pipe 1 and the outlet pipe 3 are processed into a uniformly arranged perforated plate pipe wall 4, and the measuring pipe 6 is welded on the pipe wall.

[0014] combine figure 2 , The hydrophone 8 fixed part covers the "O" ring 10 and excessively cooperates with the inner hole of the nylon sleeve 9. After the measuring part of the hydrophone 8 is installed in the hole of the connecting sleeve 7, the pressure sleeve 13 is fitted on the connecting sleeve 7. At this time, the large end face of the nylon sleeve 9 cooperates with the convex table surface of the connecting sleeve 7 to form an end face seal, and the small end face is pressed by the sleeve. 13 Press tight. Press the cover plate 12 to seal after the sound-insulating material is installed in the cavity of the press...

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Abstract

The invention discloses a flowing noise measuring device, which relates to a positioning device for measurement in fluid mechanical flowing noise sound source characteristic test. The flowing noise measuring device comprises a porous plate (4), a measuring pipe (6), a connecting sleeve (7), a hydrophone (8), a nylon sleeve (9), an O-shaped ring (10), a sealing covering plate (12) and a press sleeve (13), wherein the interference on the signal collection of the hydrophone, caused by the fluid flowing, is reduced through the pipeline-accommodating cavity type measurement, and because the contact among the nylon sleeve, the connecting sleeve and the press sleeve is all non-rigid connection, and the influence on the signal collection of the hydrophone, caused by pipeline system vibration, is also greatly reduced. The flowing noise measuring device has the advantages that the measurement is reliable, the sealing performance is good, and the installation is convenient.

Description

technical field [0001] The invention is a positioning device for measurement in the sound source characteristic test of flow noise of fluid machinery, which is suitable for positioning and installation when hydrophones collect pipeline fluid acoustic signals, and especially refers to a flow noise measurement method for measuring flow-induced noise of centrifugal pumps. device. Background technique [0002] Centrifugal pumps are important energy conversion devices and fluid delivery equipment, as well as key equipment in cutting-edge technology fields such as ships and aerospace. Accurate measurement of their sound source characteristics is the key to realizing the "quiet" design of the entire piping system. There are direct method, indirect method and pipeline measurement method to measure the flow-induced noise in the pump. Considering the feasibility and practicability, the pipeline measurement method is mainly used at present. But for a long time, the problem of the inst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H3/00
Inventor 袁建平司乔瑞张金凤袁寿其阳君裴吉
Owner JIANGSU UNIV