To Reduce Impact Noise of the Valve by Using Silent Valve Plate
نویسنده
چکیده
Through the sound spectrum analysis, this paper indicates that the noise peak frequency comes from mechanical shock, investigating the frequencies of noise sources, the noise peak frequency is found --the impact pairs of the valve plate and the spring~ The cause to raise the noise is on the phenomenon detachment between the valve plate and the spring. For this reason the valve plate produces high frequency vibration by the external exitation. The efficent way to reduce the impact noise is to adopt the high damping ma-~erial. The test using four kinds of material on the compressor 12-10/8-I shows they have decayed the SPL (A) well. SYMBOLS A valve plate area C sound wave velocity before jet C sound wave velocity 8fter jet 0 CR reflecting coefficient of valve pJate D cylind0r diameter, sprine diameter d steel wire diameter of spring E modulus of elnsticity
منابع مشابه
Emission Reduction Strategies for Small Single Cylinder Diesel Engine Using Valve Timing and Swirl Ratio
Small diesel engines are widely used for commercial vehicle and passenger car applications due to their higher torque requirements, fuel economy, and better thermal efficiency. These engines are exposed to different operating and environmental conditions and hence emissions from these engines are erratic. Strategies are required to enhance performance and reduce engine-out emissions considering...
متن کاملHealth-Related Quality of Life after Valve Replacement Surgery
Background: Heart valve disease gradually increases the pressure in the heart chambers and impairs heart pumping. It influences on quality of life due to low output, disability, fear, amnesia, anxiety, and depression. Although most of signs and symptoms in patients with heart valve diseases may significantly decrease after valve replacement surgery, there is limited information about the impact...
متن کاملSimulation and investigation of the effect of oil flow rate, electric signal of flow control valve and controller on the performance of a wet clutch
The using of wet clutches and hydraulic control devices causes a smoothly torque transfer. In this study, a wet clutch was simulated in Simulink MATLAB software. Firstly the mechanical section of the clutch was modeled and then the hydraulic section was simulated with the addition of electric flow control valve and inlet and outlet of oil flow. Finally, the effects of oil flow rate, electric s...
متن کاملInvestigation on Ring Valve Motion and Impact Stress in Reciprocating Compressors
This paper presented the theoretical and experimental investigation on ring valve motion and impact stress in a reciprocating compressor for a purpose of extending the life time of valve. A simulation model was established to describe the motion of valve plate and the physical behavior of valve plates during compressor operation was measured using an eddy current displacement sensor to validate...
متن کاملComparison the Sensitivity Analysis and Conjugate Gradient algorithms for Optimization of Opening and Closing Angles of Valves to Reduce Fuel Consumption in XU7/L3 Engine
In this study it has been tried, to compare results and convergence rate of sensitivity analysis and conjugate gradient algorithms to reduce fuel consumption and increasing engine performance by optimizing the timing of opening and closing valves in XU7/L3 engine. In this study, considering the strength and accuracy of simulation GT-POWER software in researches on the internal combustion engine...
متن کامل