It is known that an axial piston pump barrel experiences small oscillations due to forces acting over it. Cavitation als o occurs in many cases, damaging the plate and barrel sliding surfaces and therefore reducing the volumetric and overall efficiency of the pump. More importantly, the resulting failure of the pump is often a critical issue in modern industrial applications. The complex fluctu...

The DLR LUMEN (Liquid Upper stage deMonstrator ENgine) rocket engine comprises of two separate turbopumps, one each for Liquid Oxygen (LOX) and Liquified Natural Gas (LNG) supply. In both an identical bearing block separates the pump section from turbine section. current design, features oil-jet lubrication system to cool lubricate bearings during operation. Cryogenic conditions at pump-interfa...

A piston piezoelectric (PZT) pump has many advantages for the use of light actuators. How to deal with contradiction between amount and oil delivery quality is an essence when designing pump. In order depress pressure pulsation flow in a single-piston PZT pump, two-stage attenuator proposed. It involves elastic cavity group unloading valve. Unsteady inside numerically calculated analyzed reveal...

A pipeline transporting crude-oil broke in a nature reserve in 2009 and spilled 5100 m(3) of oil that partly reached the aquifer and formed progressively a floating oil lens. Groundwater monitoring started immediately after the spill and crude-oil recovery by dual pump-and-skim technology was operated after oil lens formation. This study aimed at documenting the implementation of redox-specific...

This paper presents the construcrion, newly developed design technologies and performance characteristics of a compact horizontal scroll-type compressor for room air conditione~:s. The authors were able lo develop a compacl variable speed horizontal scroll-type compressor with a cooling capacity of I. 8 kW, which necessitated the development of new mechanisms, namely, an alCial compliance mecha...

In recent years, as the mobile equipment advances, higher output and higher energy density are required of the battery which drives the mobile equipment. As one of the solutions, development of portable fuel cells (DMFC) with methanol used for fuel has been progressed and the fuel cells will be soon put to practical use. The authors have developed a small air pump (0.2W output), which is mounte...

This paper presents the development of an Artificial Neural Network system for Dynamometer Card pattern recognition in oil well rod pump systems. It covers the establishment of pattern classes and a set of standards for training and validation, the study of descriptors which allow the design and the implementation of features extractor, training, analysis and finally the validation and performa...

Substitution of a metallic diaphragm for the power piston of a Stirling engine is shown to be a promising approach to transmitting power for a heat-actuated heat pump through a hermetic seal. Hydraulic fluid under high pressure transfers the power from the diaphragu to the compressor plunger, which is balanced by a counterweight. The discussion is divided into three parts which deal with the in...

During oil fields operation, gas is extracted along with oil. In this article it suggested to use jet pumps for utilization of the associated gas, burning which causes environmental degradation and poses a potential threat human body. order determine possibility simultaneous application sucker-rod pump, driven by rocking machine, pump (ejector) in well, necessary estimate distribution pressure ...

As far as we know, there is no branch of industry where two-phase systems are not used. This the chemical, thermal, physical and finally oil industry. The process studying a hydromechanics reflects great scientific research works in recent times In work under review, main characteristics water-oil mixture were studied hydromechanical indicators this system determined. results conducted research...