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Journal of Drainage and Irrigation Machinery Engin
2000 Vol.18 Issue.4
Published 2000-07-25

1 Design for the Blade Shape of Centrifugal Pump Using Bezier Curve
Bezier curve is used to design for the blade shape of centrifugal pump. A traditional method of third order polynomial calculation for the blade shape is abandoned, and the spline function that must solve huge equations and is very complicated is also avoided. Using Bezier curve can make design simply, and the blade shape can be controlled easily. It can satisfy the different demand for cavitation and efficiency.
2000 Vol. 18 (4): 1-3 [Abstract] ( 1215 ) [HTML 1KB] [ PDF 136KB] ( 1098 )
4 Research of a New type Resisting High Temperature Magnetic Coupling
MA Ru yu, JIANG Sheng fa
Synchronous magnetic couplings have been widely used in chemical industry, pharmacy and etc. If the working temperature is high, a synchronous magnetic coupling may not operate in normal state because of the demagnetization of magnets on its internal rotor. This problem has been a trouble for a long time. A new type magnetic coupling which works according to the operating principles of squirrel cage asynchronous motors can solve this problem effectively. Finite element method is used to determine the magnetic field distribution of this new type magnetic coupling. The calculated results of torque and the difference between the rotation speeds of internal rotor and external rotor are compared with the experimental results. The experimental results indicate that this design is practicable.
2000 Vol. 18 (4): 4-7 [Abstract] ( 1004 ) [HTML 1KB] [ PDF 175KB] ( 976 )
2000 Vol. 18 (4): 8-9 [Abstract] ( 758 ) [HTML 1KB] [ PDF 59KB] ( 1026 )
10 Improving the Mechanical Sealing for Submersible Swedge Pump
LIU Long zhen
Mechanical seal is the key part of submersible sewage pump, the reliability of it decide the submersible sewage pump life. Based on the analysis of the mechanical seal construction and defects, supply one kind high efficiency, reliable mechanical seal for sewage pump use, which is simple in construction, long life in use, stability in work, easy in maintenance.
2000 Vol. 18 (4): 10-11 [Abstract] ( 1204 ) [HTML 1KB] [ PDF 85KB] ( 1409 )
12 Studies on the XMB Diaphragm Pump Performance parameter Measuring System
MA Ming jian, WANG Zun yuan, GUO Zhi dong, YIN Feng fu
It introduces how to measure and deal with the performance parameter about the flow rate, pressure, speed and torque of piston diaphragm pump. It also shows calibration of system sensor and anti interference measures and the hardware of measuring system is based on PC. Object language Delphi for Windows is adopted in the system software. Both fictitious instrument and modularization design ideals are used for programming. Experiment results disclose fine reliability, simple structure and exact measuring so it reaches the national standard GB7784—87.
2000 Vol. 18 (4): 12-15 [Abstract] ( 1368 ) [HTML 1KB] [ PDF 179KB] ( 911 )
2000 Vol. 18 (4): 16-16 [Abstract] ( 904 ) [HTML 1KB] [ PDF 65KB] ( 838 )
2000 Vol. 18 (4): 17-19 [Abstract] ( 794 ) [HTML 1KB] [ PDF 95KB] ( 922 )
2000 Vol. 18 (4): 19-19 [Abstract] ( 766 ) [HTML 1KB] [ PDF 40KB] ( 1074 )
20 Test and Evaluating on the Irrigation Equality Degree of Dripline PC in the Field
FAN Zong liang, WANG Ying, WANG Gang, CHEN Min yi, ZHANG Lan bin, ZHU Wei jun, XU Jiang
This article studies the equality degree in irrigation through several common dripline PC about trees dripline system of DONGHUANG base. It advances a more practical method on evaluating the equality degree of dripline PC, and comes out the result about the capability of dripline PC, so it can help people to select it better and use it better.
2000 Vol. 18 (4): 20-22 [Abstract] ( 1040 ) [HTML 1KB] [ PDF 134KB] ( 1399 )
2000 Vol. 18 (4): 23-24 [Abstract] ( 1337 ) [HTML 1KB] [ PDF 72KB] ( 1347 )
2000 Vol. 18 (4): 25-26 [Abstract] ( 899 ) [HTML 1KB] [ PDF 99KB] ( 1043 )
27 Never to start Work Control Circuit of Three phase Motor in Pump
LI Feng xiang
Three phase motor will be burnt out if it starts and works in the absence of phase. So special control circuit should be employed to protect motors, especially motors in pump like diving pump. Motor with this control circuit will never start to work in the absence of phase. Its features are: ①Motor will never start if any one of the phases is absent in the main circuit. ②Current source of main contactor coil is from motor connector, so motor will come to aut stop when any one of the phase is absent. ③Its riability is high.
2000 Vol. 18 (4): 27-29 [Abstract] ( 952 ) [HTML 1KB] [ PDF 120KB] ( 1135 )
2000 Vol. 18 (4): 30-32 [Abstract] ( 1152 ) [HTML 1KB] [ PDF 93KB] ( 677 )
2000 Vol. 18 (4): 33-37 [Abstract] ( 1090 ) [HTML 1KB] [ PDF 133KB] ( 738 )
2000 Vol. 18 (4): 38-41 [Abstract] ( 992 ) [HTML 1KB] [ PDF 121KB] ( 703 )
2000 Vol. 18 (4): 42-44 [Abstract] ( 752 ) [HTML 1KB] [ PDF 85KB] ( 892 )


· Call for paper of The 14th Asian International Conference on Fluid Machinery(AICFM14)
· Call for paper of the 2nd International Symposium of Cavitation and Multiphase Flow (ISCM 2016)
· JDIME have be selected for the 2015-2016 China Science Citation Database (CSCD)
· CALL FOR PAPERS and 2nd ANNOUNCEMENT"The 7th International Conference on Pumps and Fans(ICPF2015)"
· The journal won the first prize of "excellent China sciencepaper online journal" again
· WeChat is Running
· A New Column “Irrigation and Drainage Equipment Manufacturing Technology”Setting Up


· Lansheng Group
· Taifeng Pumps
· National Research Center of Pumps

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