Studies on injector pump-ultrasonic nebulizer feeding sample system for MPT-AES
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A newly built injector pump-ultrasonic nebulizer combination feeding-sample system has been designed.
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Based on the numerical simulation results, the spatial effects of the ionosphere, mainly consisting of the change on electron density (ED) and electron temperature (ET), heated by the high frequency (HF) pump wave have been analyzed quantitatively.
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Research on the method of cavitations resistance in a piezoelectric pump with 3-dimensional mesh structure
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The volume valve piezoelectric pump has received increasing attention from many areas because of its different characteristics such as the absence of chemical pollution and electromagnetic pollution.
In two stroke engines having scavenging pump located at the end,the effect of the revolving inertia force of the scavenging pump is sometimes used in conjuction with attached balance weights on the main cranks to balance the centrifugal couple of the engine.Such a method is nothing new and actual examples can be found on engines built by Pyeckuǖ- and Sulzer.But when asked by the students that how should such a problem be tackled in a general way,the author failed to find out any published articl...
In this paper a mathematical formula for the design of swivel plate of axial plunger pumps with inclined plunger and returning mechanism, is devived. The paper discusses, in terms of the design of the plate, how to select the structural parameters of the pump so as to obtain the optimum design of the returning mechanism. Finally, the paper points out the necessity of making analysis of the error in structural dimensions of the pump.
This paper theoretically analyzes the hydraulic system of the well-drilling machine and concIudes that the suction head of the muddy pump is used up by the drawdwn of the suction surface inside the drilling pipe due to density difference of the drilling mud with cuttings and the muddy water, the geometric installation height of the pump velocity head difference of drilling mud, and the total pipe losses at the suction side of the pump. This conclusion provides a primary theoretical basis f...