共搜索到57208条信息,每页显示10条信息,共5721页。用时:0小时0分0秒375毫秒
J. Cent. South Univ. Technol. (2011) 18: 573-579 DOI: 10.1007/s11771-011-0733-3 Optimum control strategy for all-variable speed chiller plant JIANG Xiao-qiang(蒋小强)1, 2, LONG Wei-ding(龙惟定)3, LI... to the chiller plant can bring a saving of 23.27% in power compared with the corresponding conventional variable speed plant, indicating that the optimal control strategy can improve the energy efficiency......
3.1 Friction coefficient The curves of the friction coefficient under different loads at sliding speed of 0.1 m/s are shown in Fig. 1. The friction coefficient as a function of the sliding velocity...Trans. Nonferrous Met. Soc. China 25(2015) 2293-2300 Wear behavior of high strength and high conductivity Cu alloys under dry sliding Yuan GAO1, Jin-chuan JIE1, Peng-chao ZHANG1, Jian ZHANG2, Tong......
and the dry sliding wear behaviour were assessed by Vickers micro-hardness tester and pin-on-disc wear test setup, respectively. It is revealed that almost uniform alloyed layer forms on the AZ91 alloy substrate for a specific current and scan speed employed in the present experiments. The alloyed layer exhibits hardness value up to 305 HV0.25, and almost negligible wear as compared to the as-received......
into contact with 100C6 steel ball with a diameter of 6 mm. All tests were performed at the same sliding speed of 100 r/min (0.052 m/s). The applied normal load was 1 N. Friction tests were performed...; dry sliding friction; surface characterization 1 Introduction Wrought aluminum-magnesium alloys (5xxx) have been widely used in automotive, shipbuilding and engineering construction due......
J. Cent. South Univ. (2016) 23: 2008-2023 DOI: 10.1007/s11771-016-3258-y
, suitable driving speed which is not less than the critical velocity, reasonable friction coefficient difference, higher damping ratio and smaller tightening. Key words: megawatt wind power; sliding... corresponding solutions were gotten. The results show that some factors such as torsional stiffness, yaw drive speed, friction coefficient difference, damping ratio and pressure are the major leading......
; 文献标志码:A 文章编号:1672-7207(2018)03-0566-08 Nonlinear bending-torsional dynamics of geared rotor system supported by sliding.... College of Mechanical Engineering, Anhui Science & Technology University, Chuzhou 233100, China) Abstract: A nonlinear dynamic model of geared rotor system coupling with sliding bearing was established......
at a sliding speed of 1 cm/s along a circle path of 2.0 mm in diameter under a normal load of 2 N for 2000 rotations, corresponding to a sliding distance of 12.6 m. Corrosive wear tests were performed using...Trans. Nonferrous Met. Soc. China 26(2016) 1801-1808 Effect of SiC content on dry sliding wear, corrosion and corrosive wear of Al/SiC nanocomposites Sareh MOSLEH-SHIRAZI1, Farshad AKHLAGHI1, Dong......
is attributed to the combined effect of the higher sliding speed and higher normal stress. Reinforcing with nano-alumina (Al2O3) and calcium (Ca) is yet another attempt of improving the hardness... analysis is used to study the wear mechanism of the worn out surface. It is observed that as the sliding speed increases, the frictional heat also increases between the contact surfaces. The formed......
......