Results 81 to 90 of about 7,758 (258)

Determination of the regularity of the rate of wear of the working hydraulic cylinder of the mechanism of the sealing plate of the garbage truck from the pressing force

Проблеми трибології
The article is dedicated to the study of the influence of the pressing force on the wear resistance of the working hydraulic cylinder of the mechanism of the sealing plate of the garbage truck.
O.V. Bereziuk, V.I. Savulyak, V.O. Kharzhevskyi, A.Ye. Alekseiev   +3 more
doaj   +1 more source

Motion planning and control of an installation robot for attitude adjustment of arc parts in underground shield tunneling

Deep Underground Science and Engineering, EarlyView.
Inspired by spiders, the multilegged walk‐through assembling robot for arc parts achieves high‐precision synchronous control under heavy loads through dual‐layer hydraulic pose dynamics modeling and hierarchical pressure optimization, significantly enhancing shield tunneling assembly efficiency and precision.
Quan Xiao, Guofei Xiang, Liang Liao, Lai Wei, Hongli Wang, Songyi Dian   +5 more
wiley   +1 more source

Hydraulic cylinder control of injection molding machine based on differential evolution fractional order PID

Journal of Measurement Science and Instrumentation, 2020
Injection molding machine, hydraulic elevator, speed actuators belong to variable speed pump control cylinder system. Because variable speed pump control cylinder system is a nonlinear hydraulic system, it has some problems such as response lag and poor ...
LI Ya-qiu, GU Li-chen, YANG Sha, XUE Xu-fei   +3 more
doaj  

Modelling of the Dynamics of a Hydraulic Positional Cylinder

Engineering Transactions, 1996
The present paper describes modelling of dynamics, results of simulation and experimental investigation of a hydraulic positional cylinder. The method of bond graph is used for modelling of the dynamics of the considered cylinder design. First, an initial digital simulation is performed in order to calculate basic dynamic characteristics of the ...
openaire   +2 more sources

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

Deep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang, Zaobao Liu, Jing Xue, Bo Lu, Wei Zeng, Dengke Zhang   +5 more
wiley   +1 more source

Analytical study of an improved mathematical model of the hydraulic drive of the garbage truck’s sealing plate mechanism, taking into account the wear of its hydraulic cylinder

Проблеми трибології
The article is dedicated to the analytical study of the improved mathematical model of the hydraulic drive of the garbage truck’s sealing plate mechanism, in which the influence of the wear of the hydraulic cylinder on its operation is additionally taken
O.V. Bereziuk, V.I. Savulyak, V.O. Kharzhevskyi, S. Cv. Ivanov, A.Ye. Alekseiev   +4 more
doaj   +1 more source

Surface hydration‐induced damage in tight oil‐bearing sandy conglomerate reservoirs

Deep Underground Science and Engineering, EarlyView.
A series of techniques such as X‐ray diffraction, scanning electron microscopy, energy‐dispersive spectroscopy, conductivity tests, and infrared thermal imaging were used. The key findings are the identification of a two‐stage surface hydration process and the elucidation of the effects of various minerals and elements on the hydration process ...
Anbang Zhao, Shuheng Du, Yuan Zhang, Jinghong Hu, Bo Zhou, Yun Wei   +5 more
wiley   +1 more source

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source

Mechanistic insights across curing regimes for enzymatic and biopolymer‐optimized reinforcement in rock masses

Deep Underground Science and Engineering, EarlyView.
This study examines the effects of curing temperature on the mechanical behavior of underground rock masses treated with enzyme‐induced calcite precipitation (EICP) and an innovative biopolymer‐modified EICP (BP‐EICP). Abstract Biocementation is an innovative and sustainable technique for reinforcing weak and weathered rock masses in natural and ...
Mary C. Ngoma, Oladoyin Kolawole
wiley   +1 more source

Tribological Behavior of Hydraulic Cylinder Coaxial Sealing Systems Made from PTFE and PTFE Compounds. [PDF]

Polymers (Basel), 2020
Deaconescu A, Deaconescu T.
europepmc   +1 more source