Turbo generator shafts are often subjected to cyclic torsion resulting in formation of large longitudinal cracks as well as circumferential cracks. The presence of these cracks could greatly impact the shaft resonance frequencies. In this paper, dynamic response of a shaft with longitudinal and circumferential cracks is investigated through a comprehensive analytical study. The longitudinally c...

A plantain (Musa Parasidiaca) chips pulverizing machine was developed in the department of Agricultural and Bio-Environmental Engineering, Institute Technology, Kwara State Polytechnic, Ilorin, Nigeria. The consists following components parts: hopper, main frame, rotary hammers/beaters, shaft, screen, suction blower, bearing, cyclone/outlet, electric motor, belt pulley. design based on engineer...

The multi-piston axial reciprocating compressor using the Sanderson-Rocker Arm Motion (S-RAM) mechanism is expected to have high volumetric efficiencies due to the application of a new type of seal to prevent the in-cylinder refrigeration gas leaking through the clearance between piston and cylinder wall. The stroke of the compressor can be controlled by adjusting the inclination angle between ...

The use of distributional semantics to represent the meaning of a single word has proven to be very effective, but there still is difficulty representing the meaning of larger constituents, such as a noun phrase. In general, it is unclear how to find a representation of phrases that preserves syntactic distinctions and the relationship between a compound’s constituents. This paper is an attempt...

Standardized methods of power transmission and motion transfer use different elements, such as keys, wedge-shaped shafts, polygonal shafts, and lateral pins to join the hub of driving or driven elements with the shaft, or make use of friction connections (cylindrical tightening connection, conical connection, tightening elements). Nowadays, the key is accepted as a universal joining method most...

The article presents the analysis of operating modes small displacement vessels, which states that most working time vessels are in standby mode, or move at low speed. main ship diesel engines operate a load 10-15% (maximum 20%), impacts operational performance: oil and water jacket engine do not have to warm up, fuel consumption increases. There takes place coking piston rings, intercoolers ot...

The purpose of diagnostics is to determine the operability pumping units station machine water lifting at a given time and identify defects in their components. For this reason, article presents diagnostic issues for stations No. 1 - 6 Karshi main canal, designed commissioned 1965-1976, where OPV11-260EG type with electric motors VDS-375/130-24 are installed, vertical units, shaft power – 8010 ...

in this paper, the effects of transverse cracks on rotating shaft were studied. according to earlier works, crack shaft failure decrease the critical speed of the shaft and also exhibit a nonlinear vibration behaviour leading to increases the amplitude of 1x and 2x harmonics (first and second order of rotational speed in torsional vibration). this suggests that the application of order analysis...

Robots promise to enhance minimally-invasive surgery, but flexion of the thin instrument shaft introduces error into models of the robot kinematics. Visual or electromagnetic tracking of the instrument tip provides correct forward kinematics, but uncertainty in shaft bending and port location leaves residual errors in inverse kinematics. These errors can cause incorrect motions that preclude th...