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Journal of Drainage and Irrigation Machinery Engin
 
2002 Vol.20 Issue.5
Published 2002-09-25
article
Article
3 A Preliminary Analysis of the Running Management for the Engineering of Water Transforming from the Yangtze River to the North
HUANG Hai-tian, QIU Bao-yun
The article presents the running system, mechanism and characteristic of the engineering of transforming water from the Yangtze river to the north of Jiangsu province in brief. According to the practice of the engineering in recent decade, the article analyses the structure and developing trend of the cost of water pumping (CWP), and counts the accumulative CWP per cubic meter elementarily. Meanwhile, the article puts forward the approach and measure on how to improve the economical and technical targets of transforming water from long distance. All these research will lead to further study on the cost of water transforming with large multi-drainage-area engineering and establish the dynamic water-price model.
2002 Vol. 20 (5): 3-6 [Abstract] ( 941 ) [HTML 1KB] [ PDF 172KB] ( 1352 )
7 Analyses on Basic Equation of S_2 Flow Surface Calculating in 3-D Theories
YAN Jing
The fluid differential equations is theoretical basis for calculating the relative speed on S 2 flow surface in 3-D analyses. There exist two different formulations of this basic equation. The author of this paper analyzed the specifics and the difference between the terms in the two formulations, aiming at establishing a more exact base to develop calculating theories related to S 2 flow surface.
2002 Vol. 20 (5): 7-9 [Abstract] ( 897 ) [HTML 1KB] [ PDF 147KB] ( 1554 )
10 Modal Analysis of Blade under Water
ZHANG Xue-rong
The paper introduces the modal analysis of blade in air and under water by using ANSYS finite element software. Fluid-structure coupled-field analysis is pointed out to solve the modal analysis under liquid medium, and obtained a higher precision result comparing with traditional experience design. The natural frequencies of blade under liquid can truly escape the range of excitation frequencies
2002 Vol. 20 (5): 10-12 [Abstract] ( 878 ) [HTML 1KB] [ PDF 139KB] ( 1072 )
13 Treatment of the Cracks on the Drum of Axial-flow pump 28CJ56
MA Zu-qiang, JIN Lei
Due to the cracks on the drum of axial-flow pump 28CJ56 in Shangqiao pumping station, the paper analyze the reason it formed and puts forword an effective way to solve it.
2002 Vol. 20 (5): 13-15 [Abstract] ( 986 ) [HTML 1KB] [ PDF 129KB] ( 1061 )
16 The Way to Improve The Insulation Performance of Oil-filled Submersible Pumps
SHI Yao-ming, XU Xiao-hong
After reviewing and analyzing the problem of low insulation problem of oil-filled submersible motor pumps, and summarizing the experiences of other methods in solving the problem, the root cause for low insulation problem was found here. Without changing other technology and performance of pumps, the problem could be solved with through some technology and workmanship improvement.
2002 Vol. 20 (5): 16-17 [Abstract] ( 1098 ) [HTML 1KB] [ PDF 131KB] ( 991 )
18 Study of Automation System of Water Conservancy Based on Internet
JI Xiao-hua
The significance of the application of Internet on automation System of water conservancy is discussed. It also gives the structure of the automation system, which includes the remote monitor, data collection and deal with. the databases technician and data transfers is also discussed, on the base of which, the problem relative and solutions are put forward here.
2002 Vol. 20 (5): 18-21 [Abstract] ( 892 ) [HTML 1KB] [ PDF 201KB] ( 1321 )
22 Study on Complete Set Lifting and Installing Technology for Axial Flow Pump
LI Jian-chun
According to medium or small vertical axial flow pump stations exist difficult problem for inspection and repair, make complete set lifting and installing technology for axial flow pump. Introduce the crucial problem about complete set lifting and installing for axial flow pump. According to different water level and different installation condition, make different schemes.
2002 Vol. 20 (5): 22-24 [Abstract] ( 955 ) [HTML 1KB] [ PDF 151KB] ( 1005 )
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2002 Vol. 20 (5): 25-26 [Abstract] ( 907 ) [HTML 1KB] [ PDF 93KB] ( 1251 )
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2002 Vol. 20 (5): 27-31 [Abstract] ( 932 ) [HTML 1KB] [ PDF 232KB] ( 1535 )
32 To Study Problem of Resisting Wear Cavitaiton of the Beizhao Pump Station Pumps of Diverting the Huanghe River Water
LU Jin-xi, DU Gui-rong
In the bank of the Huanghe River hundreds pump stations were builded, the Huanghe River silt wear very water pump, to damage very pump water way part, to have an unfavourable effect on pump performance parameter. The paper put up measure of resisting wear cavitation of the Beizhao pump station pumps of deverting the Huanghe river water, combining study and test fruit, according to the actual situation of the Beizhao engineering of diverting the Huanghe River water.
2002 Vol. 20 (5): 32-35 [Abstract] ( 955 ) [HTML 1KB] [ PDF 208KB] ( 1558 )
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2002 Vol. 20 (5): 36-37 [Abstract] ( 1081 ) [HTML 1KB] [ PDF 107KB] ( 1082 )
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2002 Vol. 20 (5): 38-39 [Abstract] ( 922 ) [HTML 1KB] [ PDF 102KB] ( 1239 )
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2002 Vol. 20 (5): 39-39 [Abstract] ( 897 ) [HTML 1KB] [ PDF 57KB] ( 1211 )
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2002 Vol. 20 (5): 40-41 [Abstract] ( 987 ) [HTML 1KB] [ PDF 89KB] ( 1282 )
42 Positive Pressure Sealing System Technology for Submersible Motor Dry inside
ZHOU Qiao-xia, et al
One of the main technology of the submersible motor is the properties of the seals, especially the properties of the seals.The mechnical seal is one of seal installation which has a good property of seal and its power loss is low. But the accidental damage is easily occured on the mechnical seal, decreasing the work pressure of the mechnical seal to lengthen its life is necessary. Using series connection or combination of seals, especially using release pressure technology for first mechnical seal, can decrease the work pressure of the mechnical seal to lengthen its life. There introduces a reserved technoloty in this article: Positive pressure sealing system, also named driving positive pressure sealing system. Using this system, the pressure inside the motor would higher than environment pressure outside. The motor can operate a period of time even though there is a little of water leaked into the motor caused by the damage of the mechnical seal.
2002 Vol. 20 (5): 42-45 [Abstract] ( 1299 ) [HTML 1KB] [ PDF 143KB] ( 1040 )
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2002 Vol. 20 (5): 46-46 [Abstract] ( 923 ) [HTML 1KB] [ PDF 52KB] ( 1310 )
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2002 Vol. 20 (5): 47-47 [Abstract] ( 890 ) [HTML 1KB] [ PDF 48KB] ( 1297 )
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2002 Vol. 20 (5): 48-48 [Abstract] ( 933 ) [HTML 1KB] [ PDF 40KB] ( 1877 )
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