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Design of Synchronous Drive Mechanism of Opposed-Piston Hydraulic-Output Engine
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作者 Hanzheng Wang Changlu Zhao +2 位作者 Fujun Zhang Zhe Zuo Yi Lu 《Journal of Beijing Institute of Technology》 EI CAS 2018年第2期250-256,共7页
In order to improve the thermal power conversion capacity of the internal combustion engine,combined with existing opposed-piston two-stroke engine( OP2S) and hydraulic free piston engine(HFPE),the integral struct... In order to improve the thermal power conversion capacity of the internal combustion engine,combined with existing opposed-piston two-stroke engine( OP2S) and hydraulic free piston engine(HFPE),the integral structure for a newtype of opposed-piston hydraulic-output( OPHO) engine has been designed,an operating principle has been introduced,the composition of its synchronous drive mechanism has been carefully analyzed,and a mathematical model has been built. In addition,the kinematics models of both the mechanism and the conventional crank-link mechanism have been established by utilizing MATLAB,and the movement rules of the pivotal moving components have been obtained. According to the simulation results,the piston movement of this newtype of opposed-piston hydraulic-output engine reveals a prominent asymmetry compared to the conventional crank-link engine. Under a fixed engine revolving speed,the compression time of the opposedpiston hydraulic-output engine is shortened while the expanding time is lengthened,thus the gas turbulence intensity is strengthened around the top dead center( TDC) position. Meanwhile,the piston obtains a longer isometric process compared to conventional engines,which could be benefitial to enhance the combustion efficiency. 展开更多
关键词 power machinery and engineering opposed-piston engine hydraumatic kinetic characteristics
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Self-Compensating Displacement Sensor Based on Hydramatic Structured Transducer and Fiber Bragg Grating 被引量:5
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作者 Shimeng CHEN Yun LIU Xiuxin LIU Yang ZHANG Wei PENG 《Photonic Sensors》 SCIE EI CAS CSCD 2015年第4期351-356,共6页
An optical fiber displacement sensor with a large measuring range for simultaneous displacement and temperature measurement is presented in this paper. We developed a specific transducer based on the piston and hydrau... An optical fiber displacement sensor with a large measuring range for simultaneous displacement and temperature measurement is presented in this paper. We developed a specific transducer based on the piston and hydraumatic structure to realize a large displacement measurement, which combined the large measuring range and high precision into a single sensor system. The spectrum showed two reflection peaks used to compensate for cross-sensitivity in the displacement detection. This displacement sensor can linearly work in a large measuring displacement range greater than 45 mm with a high sensitivity of 0.036nm/mm. The sensor we reported can be developed for real-time displacement monitoring in many industrial environments such as the mechanical shape or liquid level monitoring. 展开更多
关键词 hydraumatic structured transducer large measuring range temperature compensating optical fibersensor DISPLACEMENT
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