Dynamic Transmission Characteristics during Soft-Start of Hydro-Viscous Drive Considering Fluid-Inertia Item

Chen, Jianzhong; Xie, Fangwei; Wang, Cuntang; Zhang, Xianjun; Xuan, Rui

doi:10.2474/trol.10.35

Cited by 13 publications

(8 citation statements)

References 17 publications

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“…Because there are double arc oil grooves on the surface of the friction disc, the effective area coefficient ψ is defined as the ratio of the area of nonoil grooves to the total area, and the contact area ratio B is fully taken into account. en, the braking torque between friction pairs during soft start-up is as follows [11]:…”

Section: Hvd Torquementioning

confidence: 99%

“…Chen et al obtained that the nonlinearity of the pressure performance curve is one key cause of the poor start-up smoothness [10]. Cui et al studied the influence of the fluid-inertia item on the HVD dynamic transmission [11]. e Isight integrated optimization design platform of friction pairs in HVD was built, and the groove structure parameters were optimized [12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling and Optimization of Soft Start‐Up for Hydroviscous Drive Applied to Scraper Conveyor

Cui

Zi-sheng

et al. 2019

Mathematical Problems in Engineering

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To improve the soft start-up performance of a scraper conveyor under different working conditions, the mathematical model of the torque for controllable starting transmission was established. The influences of start-up time, load values, and moment of inertia on the soft start-up characteristics of a scraper conveyor are analyzed. Based on the analytic hierarchy process (AHP), the new evaluation system of soft start-up optimization for hydroviscous drive applied to a scraper conveyor is proposed. Through the joint simulation platform of MATLAB and Isight, the two-parameter control model for soft start-up time is established using the method of experimental design and simulated annealing algorithm. The optimal start-up time under different conditions is determined, and soft start-up is optimized. The results show that with increasing start-up time, the objective function value of soft start-up performance decreases first and then increases. Under different flywheel inertia and load conditions, there is an optimal start-up time that minimizes the objective function for better soft start-up performance. The optimal start-up time decreases with increasing load, and the optimal start-up time decreases monotonically with the input flywheel inertia. This research provides a new method and theoretical basis for the modeling and performance optimization of soft start-up for hydroviscous drive applied to a scraper conveyor.

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Section: Hvd Torquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling and Optimization of Soft Start‐Up for Hydroviscous Drive Applied to Scraper Conveyor

Cui

Zi-sheng

et al. 2019

Mathematical Problems in Engineering

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“…The experimental results showed that both the data from experimental kinematic viscosities and computed dynamic viscosities of 8# hydrodynamic transmission oil were larger than that of 32# hydrodynamic transmission oil. Then 8# hydrodynamic transmission oil is more suitable for applications and popularize of HVD [21]. The fitting curve of viscosity versus temperature based on experimental viscosities as listed in Table 1 is shown in Fig.…”

Section: Viscosity-temperature Relationmentioning

confidence: 99%

Study of Flow between Non-Isothermal Disks in Hydro-Viscous Drive

Chen

2018

Tribology Online

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The film flow between the disks is the critical factor in the design of hydro-viscous drive. In the previous work dealing with the flow in the gap, few authors considered the effect of non-isothermal interface on the flow. In order to investigate the dynamic behavior of the oil film between non-isothermal friction pair in hydro-viscous drive, the flow field of the oil film between the disks is presented with consideration of four representative temperature models. Parameters related to the flow, such as temperature, pressure, velocity, shear stress and viscous torque are obtained by means of numerical simulation. The results show that non-isothermal interface results in temperature distribution profiles that diverge from the ideal parabolic curve. Both the discrepancies about film pressure and radial velocity at the outlet are vulnerable to temperature variation derived from a set of frictional pair. Tangential velocity profiles diverge from inlet to outlet due to the non-isothermal interface. Shear stress profiles show the opposite trend caused by the substantial variation about the oil viscosity. The research results lay a theoretical foundation for the reasonable designs of hydro-viscous drive. Keywordshydro-viscous drive, numerical analysis, oil film, non-isothermal interface, computational fluid dynamics(CFD)

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“…Considering the surface roughness of the disks, Xie et al (2018) and Cui et al (2018) studied the dynamic characteristics of HVD during the soft-start process and obtained the pressure distribution of oil film and dynamic torque behavior using computational fluid dynamics methods. Based on the average flow model and G-T model, Jang et al (2011) and Cui et al (2015) performed simulations of wet clutch engagement or HVD including the drive torque and analyzed the influences of different parameters on the transmission torque. Iqbal et al (2015) developed an SAE#2 test setup mathematical model to analyze the dynamic behavior of the clutch at different phases of fluid lubrication during engagement cycle, so as to improve the performance and lifetime of clutches through testing and simulation.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of hydro-viscous flexible drive for dynamic characteristics using genetic algorithm

Chen

Zhang

et al. 2021

ILT

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Purpose The purpose of this study is to investigate the flexible dynamic characteristics about hydro-viscous drive providing meaningful insights into the credible speed-regulating behavior during the soft-start. Design/methodology/approach A comprehensive dynamic transmission model is proposed to investigate the effects of key parameters on the dynamic characteristics. To achieve a trade-off between the transmission efficiency and time proportion of hydrodynamic and mixed lubrication, a multi-objective optimization of friction pair system by genetic algorithm is presented to obtain the optimal combination of design parameters. Findings Decreasing the engagement pressure or the ratio of inner and outer radius, increasing the lubricating oil viscosity or the outer radius will result in the increase of time proportion of hydrodynamic and mixed lubrication, as well as the transmission efficiency and its maximum value. After optimization, main dynamic parameters including the oil film thickness, angular velocity of the driven disk, viscous torque and total torque show remarkable flexible transmission characteristics. Originality/value Both the dynamic transmission model and multi-objective optimization model are established to analyze the effects of main design parameters on the dynamic characteristics of hydro-viscous flexible drive.

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Dynamic Transmission Characteristics during Soft-Start of Hydro-Viscous Drive Considering Fluid-Inertia Item

Cited by 13 publications

References 17 publications

Modeling and Optimization of Soft Start‐Up for Hydroviscous Drive Applied to Scraper Conveyor

Modeling and Optimization of Soft Start‐Up for Hydroviscous Drive Applied to Scraper Conveyor

Study of Flow between Non-Isothermal Disks in Hydro-Viscous Drive

Multi-objective optimization of hydro-viscous flexible drive for dynamic characteristics using genetic algorithm

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