| Irrigation district using Motor-pumped well, main agricultural irrigation project in our country; plays an important role in agricultural irrigation. With the rapid increasing need of water in industry, agriculture and city life, exploitation underground water excessively makes underground water level decrease rapidly in a certain scope, therefore affected the operation of motor-pumped well in the irrigation district seriously. This paper, mainly aimed at the decreased underground water level, less water out of motor-pumped well and over worked of motor-pumped well centrifugal pump, done studies from the point of theory and the practice. Paper study purpose is to improve the work properties of centrifugal pump, escaping centrifugal pump working critical state or working un-normally, through reform and return to normal station by using a new device. This paper main contains the following content, the theory and characteristics of centrifugal pump working companied by jet pump, jet pump efficient factors, jet pump device design and its working point adjust. Based on a lot of experiment indoor and outdoor, the paper analyzed data and done study work, therefore gain following research accomplishment: it is feasible to use jet pump self water pressure as power to improve the work properties of the motor-pumped well of centrifugal pump, either on technology or on economy; it is convenience to use Jet device increase water head by 2-4 meters high, improving the absorption performance clearly; jet device can device accorded with natural well; it can be accept and popularized by people as its cheap, valid and simple design, make of and installation.
|
PDF Full Text Request