- ZHANG Li~1,WANG Qi-jie~1,CHEN Han-ping~2(1.Shanghai Institute of Electric Power,Shanghai 200090,China;2.Shanghai Jiaotong University, Shanghai 200030,China)
The PIV system which that can record the instantaneous flow field was used to research the flow within the inlet region of vaned diffuser. The experimental data were averaged by Phase-locked averaged Method. The velocity vector distributions when impeller was located in different relative position were got out and analyzed.
2005 08 [Abstract][OnlineView][Download 71k] - CHEN Guan-sheng, SHI Bao-xin, QIU Jia-chen(Guangdong University of Technology,Guangzhou 510640,China)
A model of no eccentric ellipse rotor compressor with single vane was exploited and tested in the basis of rolling rotor compressor. The results of experiment showed that the compressor performance accords with the value of analysis in theory.
2005 08 [Abstract][OnlineView][Download 37k] - WANG Xiao-jun(Jinggangshan College, Ji'an 343000,China)
According to the CAT type ZF32 current enlarging valve's work principle,the valve to function test item and method was studied.The hydraulics diagram of test to experiment was designed.The results show discharge valve enlarges characteristic basic the more obvious line regulation variety, and left, turn to the right to basic consistent. The entrance pressure of the discharge enlarger with load but change, but enlarge the characteristic not obvious variety because the pressure variety, the discharge enlarger compares in enlarging the characteristic better pressure stability.
2005 08 [Abstract][OnlineView][Download 34k] - YUAN Jian-ping, LI Hong, YUAN Shou-qi, TANG Yue(Jiangsu University, Zhenjiang 212013,China)
The reverse engineering for MABS double suction impeller was introduced. With the reverse engineering theory,the impeller reverse design was carried out for its structure, hydraulic performance, processing and material. The designed impeller was proved by running testing. It is referenced and useful that the reverse engineering for pump impeller was adopted.
2005 08 [Abstract][OnlineView][Download 41k] - LU Tai,HU Si-ke ,HE Bin-bin(Northeast China Institute of Electric Power Engineering ,Jilin 132012,China)
Adopting SIMPLE algorithm,the flowing field of cyclone separators was numerical value emulated using corrected k - ε turbulence model and non-staggered grid pressure interpolation method. By studying flowing field property,the optimum separator redesigning plan is proposed and tested in industry experiment, with practical results excellent.
2005 08 [Abstract][OnlineView][Download 51k] - LIU Jian-hua,ZHAO Wan-yong,WU Zhi-jiang(Lanzhou University of Science and Technology,Lanzhou 730050,China)
For many years ,a number of researches have been given to seal element ,and advanced the application of seal-instalation of associate impeller,which improves the seal preference greatly .However few researchers concern onspoiled gears,whether can we found a way to resolve the both mentioned above at the same time.So I offer a new to design seal-instalation of associate impeller according to experience in developing submarin swedge pumps ,which consides the effection of axial force . It was turned out to be feasible .
2005 08 [Abstract][OnlineView][Download 39k] - DING Ke-jin~1, CHU Wu-li~1,LU Xin-gen~1, YANG Yong~1,ZHANG Chun-ling~2(1.Northwestern Polytechnical University, Xi'an 710072,China;2.Shenyang Huawei Corpration,Shenyang 110003,China)
The internal flow field of a single-stage axial compressor is analyzed using a fast full 3-D viscous flow calculating method. The time-marching method and explicit finite volume difference scheme are employed to solve the flow inside the turbo-machinery. The flow field in the single stage compressor is numerical analyzed in detail using the calculation method, the result compare well with experimental data and are analyzed in brief based on the single-stage environment.
2005 08 [Abstract][OnlineView][Download 45k] - YIN Ze-gao~(1,2),ZHANG Tu-qiao~1,HUANG Ya-dong~1,WU Xiao-gang~1(1.Zhejiang University,Hangzhou 310027,China;2.Ocean University of China,Qingdao 266071,China)
In the case of two-step serial sudden expansions pipe flow, the characteristic of turbulent pipe flow was studied firstly, the standard k-ε mathematical model and the calculation program were established and verified properly by physical model test data. Based on the computational results of mathematical model, the head loss of serial sudden expansions pipe flow was analyzed and generalized.Results showed that the coefficient of the relative head loss is the least when the aspect ratio of middle section lies in between 3 and 4, which can supply reference to the design of serial sudden expansions pipeline.
2005 08 [Abstract][OnlineView][Download 48k] - YU Xin-qi~1,WANG Zhen-hui~1,CAI Ren-liang~2(1.Hebei University of Science and Technology,Shijiazhuang 050054,China; 2.East China University of Science and Technology,Shanghai 200237,China)
Fundamentals, developing situation and industrial applications of hydrodynamic mechanical seals, such as gas lubricated seals, upstream pumping mechanical seals, thermohydrodynamic mechanical seal and laser-textured mechanical seals with micro-pores are briefly introduced. Their developing tendency is forecasted. Researching method and developing prospect of hydrodynamic mechanical seals in our country are proposed.
2005 08 [Abstract][OnlineView][Download 64k] - DENG Ju-xiang(Anhui Designing Institute of Chemical Industry,Hefei 230009,China)
Characteristics required of valves for cities natural gas pipelines and how to choose valves for the fabrications of cities natural gas pipelines were introduced.
2005 08 [Abstract][OnlineView][Download 39k] - WANG Zhi-hong(SINOPEC Guangzhou Petrochemical Co., Ltd.,Guangzhou 510726,China)
Distillation two Y-1 boiler air-introduced machine bearing flat and basic heavy vibration was found behind being newer in whole platform, the analysis that is monitored through the state diagnoses find the ones that covered with pressing were simply rubed,the problem that the fan-machine is big in vibration had solved through changing the bearing, dealing with the rotor.
2005 08 [Abstract][OnlineView][Download 28k] - TIAN Lan-ming(SINOPEC at Changling, Yueyang 414012,China)
The solution to present problems of the ammonia recycle in oil process was brought forward,by analysis demonstration.This process difficulty is solved successfully by the application of improved screw compressor and its system.
2005 08 [Abstract][OnlineView][Download 21k] - HAO Xiu-ping~1,WANG Wen-fu~2,FEI Bo~2(1.Tianjin Baili Ertong Machinery Co.,Ltd.,Tianjin 300300,China;2.Tianjin ACT Valve Control Equipment Co.,Ltd.,Tianjin 300240,China)
Based on the working principle, characteristics of structure and design method,an automatic multi valve electric actuator was introduced and analyzed .
2005 08 [Abstract][OnlineView][Download 35k] - CHEN Qing~1,LI Jiang~2,ZHAO Ming-ju~1(1.Jilin Institute of Chemical Technology,Jilin 132022,China;2.Hefei Institute of General Machinery Technology Research,Hefei 230031,China)
The causes of the failure of axial-sealing in a certain device of transporting wax was analyzed,the structure of packing box is reformed and the packing is adaptable selected.The reformed axial-sealing has attained expecting effect.Two kinds of plans are raised,and they are provided for relative enterprise as reference.
2005 08 [Abstract][OnlineView][Download 32k] - HU Gang(SINOPEC Wuhan Branch, Wuhan 430082,China)
An inspection and strength analysis were conducted on the rotor component of flue gas turbine after 100000 hours running.The results show that this rotor component can still be used further. A preliminary investigation is carried out on the service life assessment of domestic flue gas turbine.
2005 08 [Abstract][OnlineView][Download 29k] - LIU Pei-jun,JIN Xin-qiao,XIAO Xiao-kun,SUN Yong(Shanghai Jiaotong University, Shanghai 200030, China)
An optimal strategies is presented to reset the control according to the variations of indoor and outdoor loads. The optimal strategies are tested and validated based on simulation platform of ice-storage air conditioning system, and compared with the conventional strategy of fixed set-point to result in the performance of energy use and control stability.
2005 08 [Abstract][OnlineView][Download 40k] - MA Yi-tai, NING Jing-hong, LI Min-xia(Tianjin University,Tianjin 300072,China)
Calculation data for local heat transfer coefficient and pressure drop with the quality of CO_2 obtained was presented in horizontal,round smooth tube at -8～-12℃ temperature. The effects result from tube diameter and condensation temperature ,as well as mass fluxes on local heat transfer coefficient and pressure drop are acquired. Yet the effects of tube diameter are larger than others.The theory basis for the experimental study of CO_2 condensation and the design of CO_2 condenser are provided.
2005 08 [Abstract][OnlineView][Download 50k] - ZHOU En-ze,DONG Hua,TU Ai-min(Qingdao University of Science and Technology,Qingdao 266033,China)
A research about the radiant floor heating system which takes solar energy-heat pump (SHP) as heat source is made. The system composition and the working patterns are discussed. The thermodynamics process model of the heating room serviced by this type of system with intermittent operating mode is set up. The numerical simulation results of the heating room's thermodynamics process shows that it is feasible to adopt the intermittent operation mode in the SHP source heating system.
2005 08 [Abstract][OnlineView][Download 67k] - LIU Shi-long,CHEN Ru-dong(Tongji University,Shanghai 200092,China)
Based on the expression of IPLV which is presented by ARI550-1992 first.The several problems of this expression was pointed when choosing refrigerating in practice and presents.A new method which can explain that how to calculate IPLV in practice was presented.The figure of Temperature-Load-COP (T-L-C) and a approximate method when the figure is not present was presented.
2005 08 [Abstract][OnlineView][Download 52k] - ZHANG Li-guo,ZHANG Hong-yan,YUE Yong-liang,DONG Su-xia,LI Jian-hua(Dalian Sanyo Refrigeration Co.,Ltd.,Dalian 116600,China)
Based on the comparison with average double-effect LiBr absorption chiller,The principle and characteristics of a new type of high-effect LiBr absorption chiller was described.Experimental results show a new type of high-effect LiBr absorption chiller has certain advantage.
2005 08 [Abstract][OnlineView][Download 38k] - YANG Qiong,FAN Lin(Shanghai Jiaotong University,Shanghai 200030,China)
Three strategies needed to consider in implementing ice thermal storage air-conditioning system is introduced,which are helpful in choosing reasonable design,operation and control of system, in order to realize the purpose of peak shift of electric power,energy saving and less waste.
2005 08 [Abstract][OnlineView][Download 42k] - LIN Li-zong,WANG Gang,ZONG Guang(East China University of Science and Technology,Shanghai 200237,China)
The fault diagnosis software for screw refrigerator is developed based on the old system by the help of Visual Basic 6.0 and Measurement Studio~(TM) for Visual Basic controls.The structures, functions, features of systems and the corresponding fuzzy relation matrix diagnostic theory are formulated, and an applied example is given finally.
2005 08 [Abstract][OnlineView][Download 59k] - CAO Guo-qing,TU Guang-bei(Tianjin University, Tianjin 300072,China)
Based on theory of multiple objective fuzzy decision method, the method and process of synthetic assessment and optimal choice for refrigeration compressor have been discussed from five aspects, which were technical parameter, economy, dependability, manipulating and function. Scientific and rational reference for synthetic amelioration and advancement for refrigeration compressor is provided, and a new method for compartment and assessment is offered for different refrigeration compressors.
2005 08 [Abstract][OnlineView][Download 59k] - HU Zhen-quan,WEI Ji-jun,CHENG Zhen,JIANG Yong-sheng(Hefei General Machinery Research Institute,Hefei 230031,China)
The control system of the special cooling device was analyzed,Its composition and principle was introduced.The detection,the control and the protection of several parameters was presented.The scientific control way was proposed. Thus we could improve the reliability and the stability of the special cooling device and realize forcible circular cooling of the special electronic devices.
2005 08 [Abstract][OnlineView][Download 79k] -
2005 08 [Abstract][OnlineView][Download 8k]
2005 08 [Abstract][OnlineView][Download 9k]