CN114235138A - Local noise measuring device of water jet propulsion system - Google Patents
Local noise measuring device of water jet propulsion system Download PDFInfo
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- CN114235138A CN114235138A CN202111468275.4A CN202111468275A CN114235138A CN 114235138 A CN114235138 A CN 114235138A CN 202111468275 A CN202111468275 A CN 202111468275A CN 114235138 A CN114235138 A CN 114235138A
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- Prior art keywords
- noise
- water jet
- jet propulsion
- guide vane
- propulsion system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The application discloses a device for measuring local noise of a water jet propulsion system, wherein the water jet propulsion system comprises a stern plate flange, an impeller shell connected with the stern plate flange, a guide vane body connected with the impeller shell, and a nozzle connected with the guide vane body, wherein the impeller shell and the guide vane body form an outer shell for accommodating an impeller; the device is characterized in that mounting holes are formed in the nozzle, the middle of the guide vane body and the middle of the impeller shell and used for mounting hydrophones, and the hydrophones are connected to a multi-channel signal collector through data collection lines. The application provides a water jet propulsion system noise measuring device can measure the hydrodynamic force noise of water jet propulsion real ship, can measure the water jet propulsion noise again. Compared with the existing method, the biggest difference lies in the simple arrangement form and the realizable noise measurement function; the measuring device can realize the measurement of the noise directivity and the local noise intensity of the water-jet propeller, and can realize targeted vibration and noise reduction through multipoint noise measurement and analysis.
Description
Technical Field
The application relates to a local noise measuring device of a water jet propulsion system, which can realize the noise measurement of a specific position of the water jet propulsion system, provide technical support for pertinence improvement of water jet propulsion vibration noise performance and belong to the technical field of ship engineering.
Background
The water jet propulsion has the advantages of high efficiency, low noise, excellent operation performance and the like, and is widely applied to various high-performance ships. With the development of economic society, people demand daily improvement on living comfort, water jet propulsion ships with low vibration noise are more and more favored by the market, and noise measurement is a premise for improving the low noise performance of the ships.
Currently, there are two methods for measuring the noise of a water jet propelled ship, one is to arrange a hydrophone at a fixed position in a water area, and a ship or a self-propelled model drives by a fixed route from the vicinity of the hydrophone, so as to measure the radiation noise of the ship. Another way is to measure propeller noise or ship autopilot model noise by means of an acoustic cabin device in a laboratory environment. The two methods put forward higher requirements on manpower and material resources for noise measurement, and the measured noise is usually radiation noise after leaving the propeller body and cannot capture the local noise characteristic of the propeller. The above measurement methods cannot accurately measure the vibration noise at a specific position of the water jet propeller, and cannot provide a measurement basis for the structural optimization of the water jet propeller.
Disclosure of Invention
The technical problem that this application will be solved is that prior art can't the vibration noise of accurate measurement water jet propulsion specific position, also can't provide the problem of measuring the basis for water jet propulsion's configuration optimization.
In order to solve the technical problem, the technical scheme of the application provides a device for measuring local noise of a water jet propulsion system, wherein the water jet propulsion system comprises a stern plate flange, an impeller shell connected with the stern plate flange, a guide vane body connected with the impeller shell, and a nozzle connected with the guide vane body, and the impeller shell and the guide vane body form an outer shell for accommodating an impeller; the device is characterized in that mounting holes are formed in the nozzle, the middle of the guide vane body and the middle of the impeller shell and used for mounting hydrophones, and the hydrophones are connected to a multi-channel signal collector through data collection lines.
The multichannel signal collector is arranged in the stern plate flange, and the data acquisition line penetrates through the stern plate flange and is connected with the multichannel signal collector.
Preferably, a water seal is arranged at the position where the data acquisition line penetrates through the flange of the stern plate.
Preferably, the mounting hole is an axial mounting hole.
Preferably, the mounting hole is a circumferential mounting hole.
The application aims at a ship water jet propulsion system, provides a local noise measuring device, can measure the noise of a water jet propulsion real ship or a self-propelled model, can measure the noise of a water jet propulsion device in a laboratory, and is simple and convenient to arrange and operate; compared with the existing method, the noise measuring device has the biggest difference in simple arrangement form and realizable noise measuring function; the measuring device can realize the measurement of the noise directivity and the local noise intensity of the water-jet propeller, and can realize targeted vibration and noise reduction through multipoint noise measurement and analysis.
Drawings
Fig. 1 is a water jet propeller arrangement and a noise measuring device arrangement provided in the embodiment;
reference numerals 1-1 and 1-2 denote hydrophones, reference numeral 2 denotes a data acquisition line, reference numeral 3 denotes a stern plate flange, reference numeral 4 denotes a multichannel signal collector, reference numeral 5 denotes a nozzle, reference numeral 6 denotes a guide vane body, and reference numeral 7 denotes an impeller housing.
Detailed Description
In order to make the present application more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
Examples
The local noise measuring device provided by the embodiment is used for measuring the radiation noise of the water jet propulsion system of the water jet propulsion ship. The arrangement form of the water jet propeller on the stern and the arrangement of the noise measuring device are shown in figure 1. The hydrophones 1-1 and 1-2 are arranged at corresponding positions on the nozzle 5, the guide vane body 6 and the impeller shell 7 along the axial direction or the circumferential direction of the propeller in hydrophone mounting holes (only two mounting positions are shown as an illustration in figure 1), and the data acquisition line 2 is connected with the multi-channel signal collector 4 in the cabin through a through hole on the stern plate flange 3. After the ship or the device stably operates, noise signals can be acquired, and the noise performance is judged after analysis so as to be used for targeted vibration reduction and noise reduction;
the installation positions of the hydrophones at least comprise the position of a nozzle 5, the middle position of a guide vane body 6 and the middle position of an impeller shell 7, the hydrophones are installed at the positions, so that vibration noise collection can be carried out on all core structures of the water jet propeller, and signals are collected after a ship or a test device reaches a stable operation state; the collected signals are processed, so that the noise characteristic of the water jet propulsion system can be analyzed, and the vibration noise performance of the water jet propulsion system can be optimized according to the noise characteristics of different positions.
The local noise measurement device provided by this embodiment has a working process that: according to requirements, on the nozzle, the guide vane shell and the impeller shell, along the axial direction and the circumferential direction of the propeller, the hydrophone is arranged in the hole, and the hydrophone probe is ensured to be installed in place;
a signal acquisition line penetrates through a stern plate flange, is connected with a signal acquisition device in the cabin, and is used for simply and waterproof sealing of an opening of the stern plate flange;
after the ship or the test device reaches a stable operation state, signal acquisition is carried out;
the collected signals are processed, so that the noise characteristic of the water jet propulsion system can be analyzed, and the vibration noise performance of the water jet propulsion system can be optimized according to the noise characteristics of different positions.
Claims (5)
1. A local noise measuring device of a water jet propulsion system comprises a stern plate flange, an impeller shell connected with the stern plate flange, a guide vane body connected with the impeller shell and a nozzle connected with the guide vane body, wherein the impeller shell and the guide vane body form an outer shell for accommodating an impeller; the device is characterized in that mounting holes are formed in the nozzle, the middle of the guide vane body and the middle of the impeller shell and used for mounting hydrophones, and the hydrophones are connected to a multi-channel signal collector through data collection lines.
2. The device for measuring local noise of a water jet propulsion system according to claim 1, wherein the multichannel signal collector is arranged in a transom flange, and the data acquisition line passes through the transom flange and is connected with the multichannel signal collector.
3. The device for measuring local noise of a water jet propulsion system as claimed in claim 2, wherein the position of the data acquisition line passing through the flange of the transom is provided with a water seal.
4. The device of claim 1, wherein the mounting hole is an axial mounting hole.
5. The device of claim 1, wherein the mounting holes are circumferential mounting holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111468275.4A CN114235138A (en) | 2021-12-03 | 2021-12-03 | Local noise measuring device of water jet propulsion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111468275.4A CN114235138A (en) | 2021-12-03 | 2021-12-03 | Local noise measuring device of water jet propulsion system |
Publications (1)
| Publication Number | Publication Date |
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| CN114235138A true CN114235138A (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111468275.4A Pending CN114235138A (en) | 2021-12-03 | 2021-12-03 | Local noise measuring device of water jet propulsion system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05193562A (en) * | 1991-10-18 | 1993-08-03 | Mitsubishi Heavy Ind Ltd | Radiation noise reduced propeller device for ship |
| KR20080001653U (en) * | 2006-12-05 | 2008-06-11 | 삼성중공업 주식회사 | Automatic control device for the suppression of the tip vortex cavitation inception |
| CN112254943A (en) * | 2020-10-12 | 2021-01-22 | 中国船舶工业集团公司第七0八研究所 | Device and method for measuring external characteristics and noise performance of water jet propulsion pump |
| CN112253490A (en) * | 2020-11-29 | 2021-01-22 | 江苏省水利工程科技咨询股份有限公司 | Hydrophone arrangement structure for collecting cavitation noise of blade suction surface and use method thereof |
-
2021
- 2021-12-03 CN CN202111468275.4A patent/CN114235138A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05193562A (en) * | 1991-10-18 | 1993-08-03 | Mitsubishi Heavy Ind Ltd | Radiation noise reduced propeller device for ship |
| KR20080001653U (en) * | 2006-12-05 | 2008-06-11 | 삼성중공업 주식회사 | Automatic control device for the suppression of the tip vortex cavitation inception |
| CN112254943A (en) * | 2020-10-12 | 2021-01-22 | 中国船舶工业集团公司第七0八研究所 | Device and method for measuring external characteristics and noise performance of water jet propulsion pump |
| CN112253490A (en) * | 2020-11-29 | 2021-01-22 | 江苏省水利工程科技咨询股份有限公司 | Hydrophone arrangement structure for collecting cavitation noise of blade suction surface and use method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李宁: "喷水推进器不同部件流噪声贡献度分析", 第十八届船舶水下噪声学术讨论会论文集, pages 1 * |
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