CN102937478B - System for measuring booster noise - Google Patents
System for measuring booster noise Download PDFInfo
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- CN102937478B CN102937478B CN201210453009.9A CN201210453009A CN102937478B CN 102937478 B CN102937478 B CN 102937478B CN 201210453009 A CN201210453009 A CN 201210453009A CN 102937478 B CN102937478 B CN 102937478B
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Abstract
The invention provides a system for measuring booster noise. The system comprises a turbine air inlet simulation device, a semi-anechoic room, a booster, a frequency spectrum generator, a controller and a display device, wherein the booster is communicated with an air outlet of the turbine air inlet simulation device and placed in the semi-anechoic room, the frequency spectrum generator is internally installed in the semi-anechoic room, the controller is used for controlling the turbine air inlet simulation device, and the display device is used for displaying air inlet parameters of the turbine air inlet simulation device and indoor sound decibels of the semi-anechoic room. The system for measuring the booster noise has the advantages that the turbine air inlet simulation device can set the air inlet parameters close to the turbine through the simulation of the turbine air inlet, so that the measurement is accurate; and the semi-anechoic room can eliminate external acoustic disturbance and indoors reflected noise wave disturbance, the noise spectrum measured by the frequency spectrum generator is used as the acoustic spectrum of the booster, namely, the acoustic spectrum of the booster can be independently measured, and the basis is provided for reducing the noise of the booster.
Description
Technical field
The present invention relates to measurement mechanism field, especially, relate to a kind of supercharger noise factor of measuring.
Background technology
Exhaust-driven turbo-charger exhaust-gas turbo charger volume is little, complex geometry, and turbine has certain effect to alleviating engine exhaust noise.But supercharger flow is large, and gas velocity is fast, when its work, produce high frequency birdie; Under certain exciting factor is brought out, also can produce some abnormal sounds in addition.Especially concerning supercharging gasoline engine, gasoline engine Comparision is soft, and it is more outstanding that the noise of supercharger seems.It is increasing to the car contradiction of supercharging gasoline engine is housed.Therefore, reduce supercharger noise and seem even more important.
Measure supercharger noise and there is no at present special test unit, generally on block testing stand, test together with engine, cannot carry out independence to the noise of supercharger and measure and analyze.
Summary of the invention
The object of the invention is to provide a kind of supercharger noise factor of measuring, and cannot carry out the independent technical matters of measuring and analyzing to the noise of supercharger to solve prior art.
For achieving the above object, according to an aspect of the present invention, a kind of measurement supercharger noise factor is provided, has comprised: turbine intake simulation device, semianechoic room, display device that communicate with the gas outlet of turbine intake simulation device and that be placed in sound decibel in the supercharger in semianechoic room, the inlet condition that is built in the frequency spectrum generator in semianechoic room, the control device of controlling turbine intake simulation device and demonstration turbine intake simulation device and semianechoic room.
Further, turbine intake simulation device comprises draft tube and is arranged in turn voltage stabilizer in draft tube, flowrate control valve, intensification chamber to gas-heated.
Further, flowrate control valve comprise be connected in draft tube for the flow control valve of coarse adjustment with for the flow rate fine-tuning valve of accurate adjustment, flow control valve and flow rate fine-tuning valve are connected in parallel.
Further, intensification chamber can adopt electrical heating or firing chamber heating.
Further, between the flowrate control valve in draft tube and intensification chamber, be also provided with fairing and flowmeter.
Further, semianechoic room is the enclosure space of being made up of sound insulating material, and the inwall of semianechoic room is equipped with sharp wall noise elimination piece.
Further, measure supercharger noise factor and also comprise semianechoic room air exchange system.
Further, semianechoic room air exchange system comprises the admission line that passes into constant temperature gas passing in semianechoic room and the outlet pipe that the waste gas of semianechoic room is discharged.
Further, the inlet condition of turbine intake simulation device comprises pressure, temperature and the flow of gas.
The present invention has following beneficial effect:
1, the turbine intake simulation device of measurement supercharger noise factor of the present invention is by the air inlet of simulation turbine, the inlet condition close with turbine is set, be flow, pressure and the temperature of gas, remove again to measure the noise of supercharger, it is more accurate to make to measure, the variation range of the inlet condition of its setting is large, can record the noise spectrum of supercharger under various inlet parameter;
2, semianechoic room can be got rid of the interference of extraneous sound interference indoor reflection noise waves, make the sound spectrum that noise spectrum that frequency spectrum generator is measured is supercharger, can measure independently the sound spectrum of supercharger, for the noise that reduces supercharger provides foundation.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the measurement supercharger noise of the preferred embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Referring to Fig. 1, the preferred embodiments of the present invention provide a kind of measurement supercharger noise factor, comprise turbine intake simulation device 10, semianechoic room 20, communicate with the gas outlet of turbine intake simulation device 10 and be placed in supercharger 21 in semianechoic room 20, be built in frequency spectrum generator 22 in semianechoic room 20, control the control device 30 of turbine intake simulation device 10 and show the inlet condition of turbine intake simulation device 10 and the display device (accompanying drawing is not shown) of the interior sound decibel of semianechoic room 20.Measurement supercharger noise factor of the present invention, by the air inlet of simulation turbine, is placed in supercharger 21 in semianechoic room 20, eliminates extraneous interference, measuring independently and analyze the noise of supercharger 21.
Turbine intake simulation device 10 comprises draft tube 11 and is arranged in turn voltage stabilizer 12 in draft tube 11, flowrate control valve 13, intensification chamber 14 to gas-heated.In the present embodiment, the compressed air pressure of draft tube 11 inflow points is controlled at 0.5MPa-0.7Mpa.Voltage stabilizer 12 prevents pressure surge, and the top hole pressure of draft tube 11 is remained on 0.4MP left and right by voltage stabilizer 12, and the top hole pressure of draft tube 11 will be higher than the intake pressure of supercharger 21.Flowrate control valve 13 is for controlling the uninterrupted of draft tube 11 air-flows; Preferably, flowrate control valve 13 comprise be connected in draft tube 11 for the flow control valve 131 of coarse adjustment with for the flow rate fine-tuning valve 132 of accurate adjustment, flow control valve 131 and flow rate fine-tuning valve 132 are connected in parallel, to realize the accurate adjusting to gas flow.Intensification chamber 14 can adopt electrical heating or firing chamber heating.Usually, adopt electrically heated intensification chamber 14, it takes up an area large, and cost is many, but the steady air current of its formation, temperature field is more even; Firing chamber heating, chamber 14 quick heatings that make to heat up, increasing extent of temperature is large, and its running cost is few, but behind firing chamber, temperature field is even not, easily damages turbine.Therefore the heating means that, intensification chamber 14 adopts can freely be selected as the case may be.Preferably, between the flowrate control valve 13 in draft tube 11 and intensification chamber 14, be also provided with fairing 15 and flowmeter 16, to improve flow measurement precision of the present invention.Usually, turbine intake simulation device 10 controllable flow range are 0 ~ 0.5kg/S, and temperature range is 20 ~ 700 ℃, and pressure limit is 0.15 ~ 0.4MPa.
The enclosure space of semianechoic room 20 for being made up of sound insulating material, to completely cut off extraneous noise; The inwall of semianechoic room 20 is equipped with sharp wall noise elimination piece, with the noise waves of decontamination chamber internal reflection.In the present embodiment, semianechoic room 20 is the enclosure space of long 6m, wide 6m, high 5m.In semianechoic room 20, be provided with the supercharger 21 communicating with the gas outlet of turbine intake simulation device 10; In order to measure the sound frequency of supercharger 21, frequency spectrum generator 22 is also set in semianechoic room 20.Starting supercharger 21, turbine intake simulation device 10 enters gas, and supercharger 21 starts, and sounds.Frequency spectrum generator 22 is measured the noise spectrum in semianechoic room 20, then sending one by one benchmark shakes frequently, the frequency spectrum of finding out the noise spectrum measured and the resonance of benchmark frequency spectrum, analyzes and falls low noise main frequency from the frequency spectrum of this resonance, for the noise that reduces supercharger 21 provides foundation.Acoustic meter is also set in semianechoic room 20, to measure sound decibel in semianechoic room 20 in order to prevent composition of air and the temperature imbalance in semianechoic room 20, on semianechoic room 20, is provided with semianechoic room air exchange system.Semianechoic room air exchange system comprises the admission line that passes into constant temperature gas 41 passing in semianechoic room 20 and the outlet pipe 42 that the waste gas of semianechoic room 20 is discharged.Usually, the composition of air of semianechoic room 20 and temperature imbalance ratio are very fast, the noise frequency that affects supercharger 21 for fear of it, and the ventilation in each minute of semianechoic room 20 air exchange systems is once.
Measurement supercharger noise factor of the present invention also comprises the control device 30 of controlling turbine intake simulation device 10, usually, control device 30 can be installed with above-mentioned turbine intake simulation device 10 and semianechoic room 20 compartments, the needed thermal parameter of whole system when regulating the inlet condition of turbine intake simulation device 10 and measuring, the temperature of the chamber 14 of heating up.The inlet condition of turbine intake simulation device 10 comprises pressure, temperature and the flow of gas.
Measurement supercharger noise factor of the present invention also comprises the inlet condition of demonstration turbine intake simulation device 10 and the display device of the interior sound decibel of semianechoic room 20.Frequency spectrum generator 22 in semianechoic room 20 also shows data measured by display device.Temperature, pressure, flow, frequency spectrum generator, acoustic meter measuring accuracy all should be less than or equal to 0.5%, to guarantee the accuracy of measured frequency spectrum.
To sum up, measurement supercharger noise factor of the present invention has following beneficial effect:
The turbine intake simulation device of measurement supercharger noise factor of the present invention is by the air inlet of simulation turbine, the inlet condition close with turbine is set, be flow, pressure and the temperature of gas, remove again to measure the noise of supercharger, it is more accurate to make to measure, the variation range of the inlet condition of its setting is large, can record the noise spectrum of supercharger under various inlet parameter; Semianechoic room can be got rid of the interference of extraneous sound interference and indoor reflection noise waves, makes the sound spectrum that noise spectrum that frequency spectrum generator is measured is supercharger, can measure independently the sound spectrum of supercharger, for the noise that reduces supercharger provides foundation.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a measurement supercharger noise factor, it is characterized in that, comprising: turbine intake simulation device, semianechoic room, communicate with the gas outlet of described turbine intake simulation device and be placed in supercharger in described semianechoic room, be built in frequency spectrum generator in described semianechoic room, control the control device of described turbine intake simulation device and show the inlet condition of described turbine intake simulation device and described semianechoic room in the display device of sound decibel; Described turbine intake simulation device comprises draft tube and is arranged in turn voltage stabilizer in described draft tube, flowrate control valve, intensification chamber to gas-heated.
2. measurement supercharger noise factor according to claim 1, it is characterized in that, described flowrate control valve comprise be connected in described draft tube for the flow control valve of coarse adjustment with for the flow rate fine-tuning valve of accurate adjustment, described flow control valve and described flow rate fine-tuning valve are connected in parallel.
3. measurement supercharger noise factor according to claim 1, is characterized in that, described intensification chamber can adopt electrical heating or firing chamber heating.
4. measurement supercharger noise factor according to claim 3, is characterized in that, between the described flowrate control valve in described draft tube and described intensification chamber, is also provided with fairing and flowmeter.
5. measurement supercharger noise factor according to claim 1, is characterized in that, described semianechoic room is the enclosure space of being made up of sound insulating material, and the inwall of described semianechoic room is equipped with sharp wall noise elimination piece.
6. measurement supercharger noise factor according to claim 1, is characterized in that, described measurement supercharger noise factor also comprises semianechoic room air exchange system.
7. measurement supercharger noise factor according to claim 6, is characterized in that, described semianechoic room air exchange system comprises the admission line that passes into constant temperature gas passing in described semianechoic room and the outlet pipe that the waste gas of described semianechoic room is discharged.
8. measurement supercharger noise factor according to claim 1, is characterized in that, the inlet condition of described turbine intake simulation device comprises pressure, temperature and the flow of gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210453009.9A CN102937478B (en) | 2012-11-13 | 2012-11-13 | System for measuring booster noise |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210453009.9A CN102937478B (en) | 2012-11-13 | 2012-11-13 | System for measuring booster noise |
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| CN102937478A CN102937478A (en) | 2013-02-20 |
| CN102937478B true CN102937478B (en) | 2014-06-18 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105136286B (en) * | 2015-09-01 | 2018-08-10 | 奇瑞汽车股份有限公司 | A kind of test device and test method of booster pressure release noise |
| CN108760329B (en) * | 2018-05-21 | 2020-02-07 | 中国航发沈阳发动机研究所 | Low-pressure turbine noise test method and improvement method thereof |
| CN109916505B (en) * | 2019-04-11 | 2021-02-19 | 重庆大学 | Device and method for testing abnormal noise of turbocharger |
| CN110579329B (en) * | 2019-06-27 | 2024-04-19 | 中国空气动力研究与发展中心低速空气动力研究所 | Sub/transonic jet noise research test device |
| CN110887669A (en) * | 2019-11-30 | 2020-03-17 | 安徽江淮汽车集团股份有限公司 | Detection system and detection method for supercharging device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4969536A (en) * | 1989-10-26 | 1990-11-13 | Allied-Signal Inc. | Turbocharger noise silencer |
| CN102095583A (en) * | 2010-12-04 | 2011-06-15 | 芜湖杰锋汽车动力系统有限公司 | Performance test device of mechanical supercharger |
| DE102011007031A1 (en) * | 2011-04-08 | 2012-10-11 | Robert Bosch Gmbh | Method for diagnosing a charging system of internal combustion engines |
| CN202903325U (en) * | 2012-11-13 | 2013-04-24 | 奥凯嘉集团有限公司 | System for measuring booster noise |
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