Results 111 to 120 of about 184,975 (313)
Journal of Harbin University of Science and TechnologyIn order to solve the problem of insufficient bearing capacity of hydrostatic thrust bearings at high speed, a pendulum shaped oil lifting structure is added in the double rectangular oil cavity and this paper takes the slope-shaped and the ordinary ...
YANG Xiaodong +3 more
doaj +1 more source
Dynamics of a split torque helicopter transmission [PDF]
, 1992 A high reduction ratio split torque gear train has been proposed as an alternative to a planetary configuration for the final stage of a helicopter transmission. A split torque design allows a high ratio of power-to-weight for the transmission.
Krantz, Timothy, Rashidi, Majid
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Micro Elastofluidics for Tuneable Droplet Merging
Advanced Materials Technologies, EarlyView.This technical paper provides a proof of concept of fully flexible and stretchable microfluidic technology for tuneable droplet mixing and merging. The phenomenon is justified through theoretical, numerical and experimental studies. ABSTRACT Droplet microfluidics enables precise handling of discrete fluid volumes at the microscale, with broad ...
Uditha Roshan +8 more
wiley +1 more source
Advanced Materials Technologies, EarlyView.This work presents a fully synthetic, 3D‐printed dynamic heart model with left‐side anatomy featuring sutured mitral valve chordae tendineae analogs, embedded actuators for physiologic wall contraction, and customized flexible pressure sensors for the left ventricle.
Alejandro Guillen Obando +7 more
wiley +1 more source
Lateral dampers for thrust bearings [PDF]
The development of lateral damping schemes for thrust bearings was examined, ranking their applicability to various engine classes, selecting the best concept for each engine class and performing an in-depth evaluation.
Hibner, D. H., Szafir, D. R.
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On–Off Switchable Micromotors for Use in Steerable Microvehicles
Advanced Robotics Research, EarlyView.Electrically controllable micromotors and microvehicles are developed by tuning the diffusion of the fuel. Self‐propelled micromotors using bubble propulsion show great promise for miniaturized devices with multiuse purposes such as cargo delivery and sensing. However, there is currently no method to electrically switch the micromotors on or off. Here,
Hugo Severinsson +3 more
wiley +1 more source
Effect of speed and load on ultra-high-speed ball bearings [PDF]
A study was undertaken to determine the effects of speed and load on the operation of 120-mm bore angular-contact ball bearings at speeds to 25,000 rpm and thrust loads to 22,240 newtons (5000 lb). Bearing temperature and power consumption increased with
Bamberger, E. N. +2 more
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Modulus‐Switchable Miniature Robots for Biomedical Applications: A Review
Advanced Robotics Research, EarlyView.Materials, robot designs, proof‐of‐concept functions, and biomedical applications of modulus‐switchable miniature robots. Miniature soft robots have shown great potential in biomedical applications due to their excellent controllability and suitable mechanical properties in biological environments.
Chunyun Wei, Yibin Wang, Jiangfan Yu
wiley +1 more source
Deformation Analysis of Fixed Bearing Inclined Plane Thrust Bearing
Journal of Harbin University of Science and Technology, 2017 According to the theory of lubrication，Numerical simulation of the deformation of the thrust bearing of the fixed inclined plane was carried out，by finite element numerical analysis method and using the ANSYS software.
LI Yong--hai +4 more
doaj +1 more source
Development of new materials for turbopump bearings [PDF]
The life requirement for the angular contact ball bearings in the Space Shuttle Main Engine (SSME) high pressure oxygen turbopump (HPOTP) is 7.5 hours. In actual operation, significantly shorter service life was experienced.
Maurer, R. E., Pallini, R. A.
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