scholarly journals Clinical Application of the Pressure Forming for Metallic Denture Bases by the Use of Impulsive Hydraulic Pressure Produced by Impingement of a High Speed Projectile

1980 ◽  
Vol 24 (3) ◽  
pp. 442-450
Author(s):  
Takashi Nokubi ◽  
Yoshihiko Okuno ◽  
Tamotsu Yamaga ◽  
Yoshinobu Maeda ◽  
Yasunori Endo ◽  
...  
Keyword(s):  
Clinical Application ◽  
High Speed ◽  
Hydraulic Pressure

Switchmode Hydraulic Power Supply Theory

2005 ◽  
Author(s):  
Jianwei Cao ◽  
Linyi Gu ◽  
Feng Wang ◽  
Minxiu Qiu
Keyword(s):  
Flow Rate ◽  
Dynamic Characteristics ◽  
Power Supply ◽  
Power Loss ◽  
High Speed ◽  
Hydraulic Pressure ◽  
Hydraulic Systems ◽  
Hydraulic Pump ◽  
Hydraulic Power ◽  
Supply Pressure

Switchmode hydraulic power supply is a new kind of energy-saving pressure converting system, which is originally proposed by the authors. It is mainly applied in multiple-actuator hydraulic systems, and installed between hydraulic pump and actuators (one switchmode hydraulic power supply for one actuator). It can provide pressure or flow rate that is adapted to the consumption of each actuator in the system by boosting or bucking the pressure, with low power loss, and conveniently, through high-speed switch valves, just like a hydraulic pressure transformer. There are two basic types of switchmode hydraulic power supply: pressure boost and pressure buck. Their structures and working principles are introduced. The dynamic characteristics of two typical types of switchmode hydraulic power supply, the pressure boost type and the pressure buck type, were analyzed through simulations and experiments. The performances were evaluated, and improvements on the efficiency of switchmode hydraulic power supply were proposed.

scholarly journals CLINICAL APPLICATION OF ULTRA-HIGH-SPEED SCREENS

1988 ◽  
Vol 44 (5) ◽  
pp. 542-546
Author(s):  
MASAHIRO HASHIDA ◽  
AKIYOSHI OHTSUKA ◽  
SHUICHI YAMAUCHI ◽  
KATSUHIKO UEDA ◽  
JUNJI MORISHITA ◽  
...  
Keyword(s):  
Clinical Application ◽  
High Speed ◽  
Ultra High Speed

Research on Electro-Hydraulic Control of Propellers of the Underwater Vehicles With Switch-Mode Hydraulic Power Supply

2006 ◽  
Author(s):  
Jianwei Cao ◽  
Linyi Gu ◽  
Feng Wang ◽  
Ying Chen
Keyword(s):  
Control System ◽  
Power Supply ◽  
High Speed ◽  
Weight Ratio ◽  
Pulse Frequency ◽  
Hydraulic Pressure ◽  
Hydraulic Control ◽  
Pulse Frequency Modulation ◽  
Hydraulic Power ◽  
Switch Mode

Switch-mode hydraulic power supply is a hydraulic pressure converting unit made of some distributed hydraulic components, which can boost or buck hydraulic pressure continuously with low power loss (about 20%)and continuous flow-rate. There are two types of switch-mode hydraulic power supply, pressure boost and pressure buck. (see "Switch-mode Hydraulic Power Supply Theory", 2005 ASME, IMECE-FPST No.79019)[1]. This paper introduces a new propeller driving system using the motor of the switch-mode hydraulic power supply for the underwater vehicle. And PFM (Pulse Frequency Modulation) control of high-speed switch-valves is applied to adjust the rotation speed of the propeller. The system has advantages over the widely used servo-valve valve-control system and pump-control system on the energy-weight ratio, anti-contamination performance and energy-saving capacity.

Clinical application of high speed B mode echocardiography

1977 ◽  
Vol 5 (3) ◽  
pp. 202-207 ◽  
Author(s):  
Tadashi Kambe ◽  
Kinya Nishimura ◽  
Norio Hibi ◽  
Toshinori Sakakibara ◽  
Tadayuki Kato ◽  
...  
Keyword(s):  
Clinical Application ◽  
High Speed

Research Status and Countermeasure of Temperature Rise of Hydraulic Dynamic and Static Bearing

2011 ◽  
Vol 291-294 ◽  
pp. 2291-2295
Author(s):  
Jian Fang Zhou ◽  
Jian Xi Yang
Keyword(s):  
Ball Mill ◽  
High Speed ◽  
Load Capacity ◽  
Hydraulic Pressure ◽  
Extreme Conditions ◽  
Research Strategies ◽  
Hydrostatic Bearing ◽  
Spindle Bearing ◽  
Increasing Temperature

Hydraulic dynamic and static bearing has the advantages of hydraulic pressure bearing and liquid hydrostatic bearing, with the peculiarities of higher load capacity, smallest oil film thickness, higher stiffness, and lower power and so on. It was suitable for not only high-speed precision spindle bearing but also low-speed heavy bearing. Because of the loading traits, ball mill will have a greater impact on the role of bearing, leading to the increasing temperature of bearing. The designers take many measures to reduce the temperature, but there are hardly any reports about mechanism of the increasing temperature. According to the study about the present situation and the research strategies of increasing temperature of dynamic and static bearing in the extreme conditions, this article explores the questions of the increasing temperature of dynamic and static bearing in the extreme conditions and the scarcity of this question at present, and proposes the mechanism and the research strategies of the questions of the increasing temperature of dynamic and static bearing of ball mill in the extreme conditions.

Numerical/Experimental Modelling of a Fuel Tank Impact

2005 ◽  
Author(s):  
Caroline M. Seddon ◽  
Moji Moatamedi ◽  
Wing Cheng
Keyword(s):  
Numerical Modelling ◽  
High Speed ◽  
Health And Safety ◽  
Fuel Tank ◽  
Hydraulic Pressure ◽  
Structural Behaviour ◽  
Fluid Structure ◽  
Experimental Modelling ◽  
Modelling Methodology ◽  
The Impact

High speed projectile impacts of fuel tanks can cause catastrophic failure. The complex fluid structure interactions produce structural behaviour that is often difficult to predict. This particular event was highlighted following the accident involving the Air France Concorde in July 2000. In this incident, accident investigations suggested that during the impact, penetration of the projectile didn’t occur, however, vibration of the skin coupled with excessive hydraulic pressure caused the tank to rupture outwards. The work reported details experimental and numerical analysis of a metallic rectangular fuel tank impacted by a high speed projectile, representative of the Concorde accident. The experiments were performed by Health and Safety Laboratory (HSL), in which the fuel tank was impacted at various projectile speeds. Numerical modelling of the experiments was undertaken, in which full fluid structure interaction was incorporated. Comparisons are made between measured and numerical accelerations at several points on the tank. The numerical results were consistent with the experiment, showing that the numerical modelling methodology was both valid and accurate.

A Hydraulic Pressure-Boost System Based on High-Speed On–Off Valves

2013 ◽  
Vol 18 (2) ◽  
pp. 733-743 ◽  
Author(s):  
Feng Wang ◽  
Linyi Gu ◽  
Ying Chen
Keyword(s):  
High Speed ◽  
Hydraulic Pressure

scholarly journals CLINICAL APPLICATION OF ULTRA HIGH-SPEED, SINGLE-SCREEN/DOUBLE-EMULSION FILM IN CEREBRAL ANGIOGRAPHY

1987 ◽  
Vol 43 (1) ◽  
pp. 28-33
Author(s):  
HIROOMI SUMIDA ◽  
YUJI KUME ◽  
SHUJI SEBATA ◽  
TADAMASA OHNO ◽  
KANJI SAKURA ◽  
...  
Keyword(s):  
Clinical Application ◽  
Cerebral Angiography ◽  
High Speed ◽  
Double Emulsion ◽  
Ultra High Speed ◽  
Emulsion Film
Sign in / Sign up

Export Citation Format

Share Document