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Using this superconducting axial bearing and the active bearings for the rotor radial positioning, a fully levitating vertical-shaft inductive machine has been tested.
This paper discusses the manufacturing process of rotor radial turbo-expanders for small Organic Rankine Cycle systems using additive manufacturing machine Selective Laser Melting (SLM) machine.
Gas force applied on gate rotor, radial force and axial force applied by gate rotor bearings are respectively analyzed and calculated in two different compressors with air displacement of 6 m3/min and 17 m3/min.
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The results indicate that isothermal fully-enclosed die forging can produce the rotor with radial twist blade precisely, reduce the machining time obviously, make the forging flow lines follow its contour and improve the mechanical properties effectively.
The resulting nonlinear constrained optimization problem is solved via Newton iteration and may be used to map the Pareto frontier, i.e., the set of rotor designs (radial twist and chord distributions and harmonic blade pilch inputs) for which it is not possible to improve upon the performance in one flight conditions without degrading performance in the other.
The results show that compared to the radial rotor, the forward-skewed rotor demonstrates a wider Stable Operating Range (SOR), is able to reduce the total pressure loss in the hub region and make main loading of blade accumulating in the mid-span region.
Compared to the radial rotor, in the backward-skewed rotor there is higher total pressure loss near the hub and shroud regions and lower loss in the mid-span region.
In this paper means of active control of radial rotor vibrations in electrical machines are considered.
The PI controller was constructed to correct the detected motion error of the rotor in the radial direction.
This paper describes the process of precision forging of an aluminium-alloy rotor with 23 radial twist blades.
It consists of two basic components: an inducer like an axial-flow rotor, and the radial blades where energy is imparted by centrifugal force.
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