Characteristic Analysis and Co-Validation of Hydro-Mechanical Continuously Variable Transmission Based on the Wheel Loader

Wan, Lirong; Dai, Hanzheng; Zeng, Qingliang; Sun, Zhonglin; Tian, Mingqian

doi:10.3390/app10175900

Cited by 15 publications

(8 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The operation of the mechanical transmission is complex, and for harvesters with a wide range of power variations, more gears are required to meet the requirements of the corresponding operations [20]. Furthermore, standard gear transmission cannot realize step-less speed change [21]. Therefore, the entire hydraulic pressure drives the ratooning rice harvester's triangular crawler chassis.…”

Section: Overall Structure and Working Principlementioning

confidence: 99%

The Design and Test of the Chassis of a Triangular Crawler-Type Ratooning Rice Harvester

et al. 2022

View full text Add to dashboard Cite

Due to the high rolling rate of a regular crawler paddy harvester and the absence of mature first season harvester products of ratooning rice, combined with the planting mode and harvest requirements of ratooning rice, a triangular crawler ratooning rice harvester is specifically designed. The structure and steering principle of the triangular crawler chassis are described. The hydraulic system is simulated and analyzed by AMESim2020 (Guangzhou, China) to verify the rationality of its design; RecurDynV9R4 (Guangzhou, China) is used to simulate and analyze the field straight/turning situation of differential steering chassis and rear-axle steering chassis. The results show that the rear axle steering chassis has a smaller turning radius and lower rolling loss rate and the change of track tension is more stable during steering. The field test is conducted to verify the reliability of the simulation results. The field test shows that the rolling loss rate of the rear axle steering chassis is reduced by 27.9% compared with the differential steering chassis. The machine’s operating speed is 2.8 km/h, the minimum turning radius is 780 mm, and the straight rolling rate is 26.8%. The operating performance is stable, and the operational process is smooth. Compared with the existing conventional harvester, the linear rolling rate of the first harvest of ratooning rice is reduced by 26.1%, and the test results are consistent with the RecurDyn simulation results. The results are reliable, providing a reference for the theoretical research of the chassis of the later ratoon rice harvester.

show abstract

Section: Overall Structure and Working Principlementioning

confidence: 99%

The Design and Test of the Chassis of a Triangular Crawler-Type Ratooning Rice Harvester

et al. 2022

View full text Add to dashboard Cite

show abstract

“…For this reason, the choice of layout among the many possible ones as well as the sizing and management of the transmission are of crucial importance. These three aspects have been addressed in research since the 1960s: simple configurations, known as Input Coupled (IC) and Output Coupled (OC) [4][5][6][7][8][9], and complex configurations characterized by multiple planetary or by additional gears [10][11][12][13][14][15]. In [16], thanks to an analytical formulation of the transmission layout, the optimization process searches for the best layout among the many possible ones and simultaneously the optimal sizes of the components.…”

Section: Introductionmentioning

confidence: 99%

Hydromechanical Transmission IC2OC: Component Sizing and Optimization

Andretta,

Rossetti,

Macor

2024

Fluids

View full text Add to dashboard Cite

The IC2OC transmission is a continuous transmission whose layout can change from simple IC to simple OC configuration and vice versa. It was proposed to cover a wider range of vehicle speeds without adding gears. Its sizing can lead to higher efficiencies than those of the IC and OC layouts. Therefore, this work deals with the sizing methodologies of this transmission. Two methodologies are proposed and discussed: the first uses the functional and constitutive equations of the transmission; the second is based on a mathematical programming problem. Both methodologies start from the choice of the full mechanical point speeds. The comparison between the two methods is carried out on the transmission of a commercially available 230 kW reach stacker. The comparison shows that the functional method, leaner and faster, can provide results very close to those obtained with the heavy and time-consuming optimization, provided that the values of the two full mechanical point speeds are the optimal ones for the two basic transmissions taken individually.

show abstract

“…An automatic design process was implemented in the proposed method. Wan et al 10 proposed an optimization design method of the input coupling type of HMCVT which based on the wheel loader and determined reasonable structural forms for connection of working conditions. This method established the general efficiency equation for the reasonable structural form for efficiency analysis and presented a method of co-validation of the simulation.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the transmission characteristics of an HMCVT for a high-powered tractor based on an improved NSGA-II algorithm

Zhai

Song

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

The hydro-mechanical continuously variable transmission (HMCVT) is a critical component of the power transmission system in a tractor. However, the complexity of the operating conditions imposes high requirements on the transmission characteristics. To improve the powerful performance and economy of HMCVTs and satisfy the operational demands of high-powered tractors, a new optimization design method for the characteristic parameters of an HMCVT is proposed. First, the characteristics of an HMCVT are modeled, and the influence of the structural parameters on the transmission characteristics is analyzed. Then, HMCVT performance evaluation indexes are formulated. In accordance with the speed regulation of system, power performance, and economy characteristics, a multi-objective optimization mathematical model is established, and an improved fast non-dominated sorting genetic algorithm (INSGA-II) is designed. The introduction of a normal distribution crossover operator (NDX) and an improved adaptive adjustment mutation operator not only ensures the population diversity but also improves the Pareto solution convergence properties during the process of genetic evolution. The superiority of INSGA-II is verified by comparison with a traditional multi-objective genetic algorithm. Finally, the optimization results show that the torque ratio is increased by approximately 2.81%, 14.32%, 2.31%, and 15.07% in HM1, HM2, HM3, and HM4 respectively. The transmission efficiency is increased by approximately 3.48% and 1.97% in HM1 (HM3) and HM2 (HM4). Also, INSGA-II finds the optimal solution with a faster speed and shorter optimization time than MULGA. This research can serve as a reference for the design and optimization of HMCVTs for high-powered tractors.

show abstract

Characteristic Analysis and Co-Validation of Hydro-Mechanical Continuously Variable Transmission Based on the Wheel Loader

Cited by 15 publications

References 19 publications

The Design and Test of the Chassis of a Triangular Crawler-Type Ratooning Rice Harvester

The Design and Test of the Chassis of a Triangular Crawler-Type Ratooning Rice Harvester

Hydromechanical Transmission IC2OC: Component Sizing and Optimization

Optimization of the transmission characteristics of an HMCVT for a high-powered tractor based on an improved NSGA-II algorithm

Contact Info

Product

Resources

About