Results 21 to 30 of about 5,455,841 (281)

On the Theory of Screw Propellers

open access: yesJournal of Zosen Kiokai, 1956
The author who stated the outline of the theory of free-running screw propellers in his previous paper (the Journal of the Society of Naval Architects of Japan.No. 100, p. 15) calculated the characteristics of the practical propellers and proved that the theoretical values agree nearly with the experimental results, and suggested a method of design of ...
  +7 more sources

Spatial Stiffness Analysis of the Planar Parallel Part for a Hybrid Model Support Mechanism

open access: yesApplied Sciences, 2020
The hybrid aircraft model support mechanism is subjected to six directional forces in the experiment, and high spatial stiffness requirement of the parallel part is the guarantee for the stability of the aircraft model.
Jiawei Gu, Zhijiang Xie, Xiaoyong Wu
doaj   +1 more source

Design of Formed Milling Cutter for Double-Helix Screw Based on Noninstantaneous Envelope Method

open access: yesAdvances in Mechanical Engineering, 2013
The design theory and method of formed milling cutter for double-helix screw of progressing cavity pump are presented. Through analyzing the shape and characteristic parameters of double-helix screw, the helicoids equation and axial curve equation of ...
Yun Li   +3 more
doaj   +1 more source

Research on Displacement Mode and Path Tracking Method of Square Combined Deployable Mechanism

open access: yesXibei Gongye Daxue Xuebao, 2019
The motion path of the developable mechanism can not only grasp whether the mechanism can move according to the expected law, but also provide theoretical support for motion control.

doaj   +1 more source

pyScrew4Mobility: Modul Python untuk Penentuan Mobilitas Manipulator Paralel Berbasis Teori Screw

open access: yesMetal: Jurnal Sistem Mekanik dan Termal, 2020
This paper addresses the mobility determination of parallel manipulators (PMs) using screw theory with algebra methods on an open-source computer algebra package: Sympy (symbolic python).
Adriyan Adriyan
doaj   +1 more source

Type synthesis of 6-DOF mobile parallel link mechanisms based on screw theory

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2022
Mobile parallel mechanisms (MPMs), which are parallel mechanisms with moveable bases, have previously been proposed to resolve the limited workspace of conventional parallel mechanisms.
Siying LONG   +2 more
doaj   +1 more source

Numerical Analysis of Performance, Rotor Temperature Distributions, and Rotor Thermal Deformation of an R134a Screw Compressor [PDF]

open access: yes, 2012
A numerical analysis is performed to systematically calculate the performance, rotor temperature distributions, and rotor thermal deformation of an R134a screw compressor. The analysis procedure includes three major steps.
Hsieh, Wenhsin   +3 more
core   +1 more source

Solid–liquid transport in a modified co-rotating twin-screw extruder-dynamic simulator and experimental validations [PDF]

open access: yes, 2004
This work presents a dynamic transport model of a solid–liquid media through a twin-screw extruder (TSE). The application under consideration is the solid–liquid extraction of solute from raw plant substrate.
Prat, Laurent E.   +4 more
core   +1 more source

Reduced Dynamic Modeling for Heavy-Duty Hydraulic Manipulators With Multi-Closed-Loop Mechanisms

open access: yesIEEE Access, 2020
A reduced dynamic modeling approach is introduced to systematically establish explicit closed-form dynamic equations for the main motion system of a heavy-duty hydraulic manipulator with multi-closed-loop mechanisms.
Yi Zhang, Wenhua Ding, Hua Deng
doaj   +1 more source

Non-Uniform Clearance between Rotor Surfaces and Its Effect on Machine Performance in Twin-Screw Compressors [PDF]

open access: yes, 2012
The performance of twin-screw compressors is primarily affected by the clearance between a pair of meshing rotors. This study proposes a method for calculating the normal clearance along the contact line between rotors using two normal rack curves, which
Wu, Yu-Ren   +2 more
core   +1 more source

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