Local noise measuring device of water jet propulsion system
A technology for water-jet propulsion and noise measurement, which is applied to measurement devices, ultrasonic/sonic/infrasonic waves, instruments, etc., and can solve problems such as the inability to accurately measure the vibration and noise of water-jet propulsion, and the inability to optimize the measurement basis for the structure of water-jet propulsion. , to achieve the effect of simple layout, easy layout and operation
Pending Publication Date: 2022-03-25
708TH RES INST OF CSSC
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Problems solved by technology
[0004] The technical problem to be solved in this application is that the prior art cannot accurately measure the vibration noise at a specific position of the water jet, nor can it provide a measurement basis for the structural optimization of the water jet
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Embodiment
[0015] The local noise measurement device provided in this embodiment is used to measure the radiated noise of the water jet propulsion system of the water jet propulsion ship. For the arrangement of water jet propellers at the stern and the arrangement of noise measurement devices, see figure 1 . Open the hydrophone installation hole ( figure 1 Only two installation positions are given as illustrations in ), install the hydrophones 1-1 and 1-2 in the corresponding positions, and the data acquisition line 2 passes through the through hole on the transom flange 3 and the multi-channel signal acquisition in the cabin Device 4 is connected. After the ship or device is in stable operation, noise signal collection can be carried out, and the noise performance can be judged after analysis, which can be used for targeted vibration and noise reduction;
[0016] The installation position of the hydrophone includes at least the position of the nozzle 5, the middle position of the gui...
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The invention discloses a local noise measuring device for a water jet propulsion system. The water jet propulsion system comprises a stern board flange, an impeller shell connected with the stern board 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 containing an impeller; the impeller 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 a hydrophone, and the hydrophone is connected to a multi-channel signal collector through a data collection line. The water jet propulsion system noise measuring device provided by the invention can measure the hydrodynamic noise of a water jet propulsion real ship, and can also measure the noise of a water jet propeller. Compared with the existing method, the method has the biggest difference that the method is simple in arrangement form and can realize a noise measurement function; by means of the measuring device, noise directivity and local noise intensity measurement of the water-jet propeller can be achieved, and targeted vibration and noise reduction can be achieved through multi-point noise measurement and analysis.
Description
technical field [0001] This application relates to a local noise measurement device of a water jet propulsion system. The application of the device can realize the noise measurement of a specific position of the water jet propulsion system, and provide technical support for targeted improvement of the vibration and noise performance of the water jet propulsion system. It belongs to ship engineering technology field. Background technique [0002] Waterjet propulsion is widely used in various high-performance ships due to its advantages of high efficiency, low noise and superior maneuverability. With the development of economy and society, people's requirements for living comfort are increasing day by day, and water jet propulsion ships with low vibration and noise are more and more popular in the market, and noise measurement is a prerequisite for improving the low noise performance of ships. [0003] At present, there are generally two methods for measuring the noise of wat...
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Login to View More IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 邱继涛蔡佑林张恒汲国瑞赵建刘霞勇
Owner 708TH RES INST OF CSSC