Influence and Optimization of Nozzle Position on Lubricant Distribution in an Angular Contact Ball Bearing Cavity DOI Creative Commons
Baogang Wen, Yuanyuan Li,

Yemin Li

et al.

Lubricants, Journal Year: 2024, Volume and Issue: 12(12), P. 419 - 419

Published: Nov. 28, 2024

In this paper, the lubrication flow field model for an angular contact ball bearing considering characteristics of nozzle position was constructed with CFD methods, and simulation results were compared validated test results. The research carried out on lubricant distribution in cavity under different angles heights, optimized response surface methodology. show that are closely related to angle height. weighted average oil phase volume fraction cage guiding decreases first then increases increase height surface. optimal determined by finding maximum value regression function specified area.

Language: Английский

Study on static and dynamic characteristics of the electro-hydraulic proportional directional valve DOI

Meisheng Yang,

Kun Lian,

Shuang Luo

et al.

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science, Journal Year: 2025, Volume and Issue: unknown

Published: April 29, 2025

Electro-hydraulic proportional directional valves are widely used in precision engineering fields, where their operational stability and reliability critical to the performance of hydraulic systems. However, high pressure high-frequency responses significantly affect forces acting on spool, while deformations caused by thermal loads may further compromise its performance. Therefore, analyzing compensating for forces, as well investigating deformation behavior spool under loads, essential enhancing reliability. Based CFD numerical calculation methods fluid-thermal-solid multi-physics coupling technology, study systematically investigates characteristics spool. First, Fluent was simulate fluid domain steady-state transient conditions, obtaining velocity contour maps, flow rate curves, different structural cavities formed valve sleeve at opening degrees. The analysis identified best cavity configuration between Secondly, orthogonal experimental design simulation were conducted arc-shaped transition cavity, followed multi-objective optimization using a genetic algorithm. optimized structure reduced force varying extents, with maximum reduction 23%. Finally, technology employed, selecting optimal compensation effect analysis. results show that both radial directions increase increases. At 1 mm, Z direction is 7.0471 μm. Additionally, temperature, Y shows linear growth trend.

Language: Английский

Citations

0
Numerical simulation of flow capacity of regulating valve based on ensemble Kalman filter correction turbulence model DOI
Zhijun Lei, Man Zhao,

Shuxun Li

et al.

Results in Engineering, Journal Year: 2025, Volume and Issue: 26, P. 105100 - 105100

Published: May 2, 2025

Language: Английский

Citations

0
Dynamic behavior of a pilot-operated hung-type diaphragm valve in dependence on the pressure difference and excitation duration DOI Creative Commons
M. Meriç, Ján Hrubý

Results in Engineering, Journal Year: 2025, Volume and Issue: 26, P. 104984 - 104984

Published: April 18, 2025

Language: Английский

Citations

0
The application of a non-hydrostatic RANS model for simulating irregular wave breaking on a barred and sloping beach DOI Creative Commons
Ali Shirkavand, Kambiz Farrahi-Moghaddam

Results in Engineering, Journal Year: 2024, Volume and Issue: 23, P. 102451 - 102451

Published: June 20, 2024

In the current study, a non-hydrostatic two-dimensional vertical (2DV) numerical model with shock-capturing technique is developed to simulate irregular wave breaking on barred beach. The complete form of 2DV Reynolds-averaged Navier-Stokes (RANS) equations discretized using finite volume approach. spatial discretization phase, flux limiter function employed for velocity advection terms prevent non-physical oscillations in regions steep gradients. A novel method has been introduced during stage, leading significant reduction computational expenses. For temporal discretization, Leapfrog method, known its second-order accuracy time, address wave-damping issues. Model validation involves comparison between simulation results and experimental data pertaining breaking, affirming satisfactory performance model. To evaluate model, Root Mean Square Error (RMSE) was calculated. assessment showed that capable estimating height reported experiments used an RMSE 0.002 0.089, mean periods 0.061 0.252.

Language: Английский

Citations

3
Research on Noise Reduction of Water Hydraulic Throttle Valve Based on RBF Neural Network and Multi-Island Genetic Algorithm DOI Creative Commons
Huawei Wang,

Linjia Nan,

Xin Zhou

et al.

Machines, Journal Year: 2024, Volume and Issue: 12(5), P. 333 - 333

Published: May 13, 2024

Excessive pressure drop within the internal flow channel of water hydraulic throttle valve will generate severe noise. In order to reduce noise valve, in this paper, model was established, and characteristics acoustic were simulated. The simulation results showed that parameters throat structure, such as half angle, inlet angle length, have a significant effect on valve. Then, three main structural used optimization variables, radial basis function (RBF) neural networks multi-island genetic algorithms (MIGA) approximate relationship between established by RBF networks, MIGA optimize model. Finally, optimal based obtained parameters, its analyzed through experiment. research indicated method, which combines Neural Network MIGA, can effectively valves.

Language: Английский

Citations

1
Ways to Protect Equipment from Hydraulic Shock DOI Open Access
Yilin Fang,

S. Kudashev

Bulletin of Science and Practice, Journal Year: 2024, Volume and Issue: 10(6), P. 296 - 305

Published: June 14, 2024

The hydraulic equipment is experiencing damage to its components and even the mechanical owing shock induced by a sudden rise in load, resulting step reaction system. An analysis of system conducted protect from detrimental effects shock. This includes examining such as damper, centrifugal pump, accumulator, control valve, others. primary function power component mitigate stress altering pump’s flow rate. element initiates reversing valve order auxiliary primarily concentrate on enhancing efficiency accumulator maximizing synergistic utilization damping components. By adjusting input value, one may regulate rate pressure discussion revolves around finding most efficient frequency shortest amount time.

Language: Английский

Citations

1
Experimental and numerical investigation on particle erosion and structural optimization of two elbows in series under solid-liquid flow DOI
Bochao Cui, Liang Zhao,

Chun Fu Jin

et al.

Process Safety and Environmental Protection, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 1, 2024

Language: Английский

Citations

0
Influence and Optimization of Nozzle Position on Lubricant Distribution in an Angular Contact Ball Bearing Cavity DOI Creative Commons
Baogang Wen, Yuanyuan Li,

Yemin Li

et al.

Lubricants, Journal Year: 2024, Volume and Issue: 12(12), P. 419 - 419

Published: Nov. 28, 2024

In this paper, the lubrication flow field model for an angular contact ball bearing considering characteristics of nozzle position was constructed with CFD methods, and simulation results were compared validated test results. The research carried out on lubricant distribution in cavity under different angles heights, optimized response surface methodology. show that are closely related to angle height. weighted average oil phase volume fraction cage guiding decreases first then increases increase height surface. optimal determined by finding maximum value regression function specified area.

Language: Английский

Citations

0