Results 21 to 30 of about 7,012 (287)
The Loop ‘N’ Tack Biceps Tenodesis: An All-Arthroscopic, Intra-Articular Technique
Arthroscopy Techniques, 2020 Tenodesis and tenotomy of the long head of the biceps are treatment options for a wide range of pathologies without clear superior technique or site of fixation.
Jon E. Hammarstedt, M.D. +3 more
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Layered Polymer Injection Throttle Valve Core Structure Optimization Design
Journal of Harbin University of Science and Technology, 2017 In order to solve the separate layer polymer injection in polymer underground low shear injection allocation problem and improve the oil displacement effect of polymer，this paper compares the three kinds of valve structure，spool indoor test，and a valve ...
YOU Bo, ZOU Tian-yang, JIA De-li
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A Comprehensive Compensation Method for High-speed Gear Pumps Without the Cavitation Phenomenon
Jixie chuandong, 2023 In order to improve the cavitation performance under high-speed for external gear pumps, a comprehensive compensation method with the small backlash, innovative annulus relief-groove and increasing inlet oil-pressure is proposed.
Li Yulong, Hou Xinyu, Zhang Lihua
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“Relief-Retaining” Control Technology of Floor Heave in Mining Roadway with Soft Rock: A Case Study
Advances in Civil Engineering, 2021 The floor heave problem is one of the important factors affecting the stability and safety of surrounding rocks of roadways, especially in deep high-stress mining roadway with soft rock. The return airway of no.
Ai Chen +5 more
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Linköping Electronic Conference Proceedings, 2023 In hydraulic axial piston machines, each chamber switches between the high-pressure and the low-pressure port with every revolution. How this process, the commutation, is done, is an essential part of pump design. The commutation typically targets a smooth pressure transition to minimize compressible flow pulsations. However, an ideal pressure match is
Heeger, Thomas, Ericson, Liselott
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Meikuang Anquan, 2020 Taking 1604 working face of Guhanshan Mine as the research background, by means of a high-precision micro-seismic monitoring system and numerical simulation, the dynamic failure characteristics of the surrounding rock and the danger of water inrush from
YU Chunsheng, ZHAI Changzhi
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Scientific Reports, 2023 Aiming at the engineering problem of roadway deformation and instability of swelling soft rock widely existed in Kailuan mining area, the mineral composition and microstructure of such soft rock were obtained by conducting scanning electron microscopy, X-
Tuo Yang +4 more
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Models for Flow Rate Simulation in Gear Pumps: A Review [PDF]
, 2015 Gear pumps represent the majority of the fixed displacement machines used for flow generation in fluid power systems. In this context, the paper presents a review of the different methodologies used in the last years for the simulation of the flow rates ...
Fernandez Palomino, Gloria +1 more
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Carsologica Sinica, 2023 Karst tunnels are usually faced with the risk of water disaster caused by seasonal fluctuation of water level in water-eroded groove. Due to seasonal precipitation, water supply and other reasons, water storage structures such as karst caves and ...
Zhiyan CAI +6 more
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A review of high-speed electro-hydrostatic actuator pumps in aerospace applications: challenges and solutions [PDF]
, 2019 The continued development of electro-hydrostatic actuators (EHAs) in aerospace applications has put forward an increasing demand upon EHA pumps for their high power density.
Chao, Qun +3 more
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