This paper presents the flow model of the small-hole feed-water pipe andchemical dosing pipe with equal pitch arrangement,and obtains analytical solution of flowcharacter and formula of flow deviati0n,which make design or correction of these pipes moreprecise and rational.

Based on the dimensional analysis and concept of equivalent diameter,a formulae for calculating the flow resistance of a ball is modified,so that the relationship between the flow resistance of the valve core and it's position in the Venturi terminal variable air valve can be obtained. A design scheme of spring with equal pitch in cylinder is proposed.

An new design of changing cyclinder spiral spring into equal pitch circular cone spring is presented for spring system and the calculation formula of circular cone spring's bending and transverse stiffness is derived.

The design of damper windings in modern salient-pole synchronous machines is flexible. Besides symmetric damper windings with an equal pitch, there are symmetric damper windings with an unequal pitch, asymmetric damper windings repeated in every two poles.

The speed and diversion of the three phase motor are under real time control with the programmable controller and the inverter, so the flexible control of the short stroke, equal pitch, and cross winding on the circular conical surface is realized, and this make it possible that the twisting frame realizes mechanical electrical integration all round.

The obtained results indicate that in comparison with those of the original equal pitch cascade stator the average vibratory stress of the first construction decreases by 30.8%, and that of the second-by 42%.

The MeV ion implantation chamber facilities are modified to load 10 cm (4 in) wafers by replacing the vertical 6 cm long non linear lead screw and its control system with a 12 cm long equal pitch lead screw and a velocity control system.

This paper presents a method for machining of taper cutting tools with equal helix angle. The principle of the method is using taper helical curve with equal pitch to approach equal angle one.

This paper analyze the principle of the joggling in the cold rolling process for involute spline manufacturing and establishes the CAD model of the roller based on the principle of equal pitch helicoids.

In this paper, the unequal-pitch single layer windings are proposed for large hydro-electric generators with direct water-cooling for the purpose of greatly increasing the number of possible schemes of windings, thus improving the selection of the best scheme by comparison. The design process of the unequal-pitch single-layer windings and the harmonic analysis of winding MMF are described. Existing difficulties in constructing this kind of windings are pointed out, and appropriate methods of overcoming...

In this paper, the unequal-pitch single layer windings are proposed for large hydro-electric generators with direct water-cooling for the purpose of greatly increasing the number of possible schemes of windings, thus improving the selection of the best scheme by comparison. The design process of the unequal-pitch single-layer windings and the harmonic analysis of winding MMF are described. Existing difficulties in constructing this kind of windings are pointed out, and appropriate methods of overcoming them are suggested. By means of these methods, the unequal-pitch single-layer windings will be made useful in practical applications as they now have the same technological properties as the equal-pitch single-layer windings. "The simplest unequal-pitch single-layer windings" achieved merely by adding a few askew joint-Sleeves are recommended. Such windings with 672 slots and 110 poles are dealt with in detail as a typical example.

This paper presents the dynamic stress tests of the compressor blade in the gas turbine engine in which the compressor stator possesses two kinds of unequal pitch cascades. The effect of these two kinds of stators on the blade vibration is analysed.The obtained results indicate that in comparison with those of the original equal pitch cascade stator the average vibratory stress of the first construction decreases by 30.8%, and that of the second-by 42%. Meanwhile, somemore complex phenomena also...

This paper presents the dynamic stress tests of the compressor blade in the gas turbine engine in which the compressor stator possesses two kinds of unequal pitch cascades. The effect of these two kinds of stators on the blade vibration is analysed.The obtained results indicate that in comparison with those of the original equal pitch cascade stator the average vibratory stress of the first construction decreases by 30.8%, and that of the second-by 42%. Meanwhile, somemore complex phenomena also occurred, for example, the frequency of resonant revolutions greatly increases; the beat phenomena appear in all the vibratory signals of the first construction and so on.In this analysis, the excited force of wake for these stators is expanded by the Fourier series. As a result, the frequency spectrum of excited force agrees very well with that obtained in the tests. The solution of the blade forced vibration equation is investigated, so that the phenomena appeared in the tests such as dynamic response of the blade and beat can be well explained.

The sweep auger for discharge grain divided in layer is an important installation of cylinder bin, formerly, all designs had based on experience.In this article, first of all, the working principle. of sweep auger is discussed, the functional relation between the coordinate of the cross- section, pitch, external diameter, velocity of rotation, angular velocity of revolution and depth of discharge is built in succession, and then, the envelope curve equation of the equal-pitch sweep auger is...

The sweep auger for discharge grain divided in layer is an important installation of cylinder bin, formerly, all designs had based on experience.In this article, first of all, the working principle. of sweep auger is discussed, the functional relation between the coordinate of the cross- section, pitch, external diameter, velocity of rotation, angular velocity of revolution and depth of discharge is built in succession, and then, the envelope curve equation of the equal-pitch sweep auger is obtained.But the equal-pitch sweep auger is not ideal for thin layer discharger especially in large diameter bins, this article gives out the linear function of pitch which varies with the coordinate of the cross-section and the external diameter of the auger. Fin-ally, the envelope curve equation of the variable-pitch sweep auger is obtained.At the end of this paper, some technical data are presented for reference.