A new continuously variable transmission system applied to transmission system of the roadheader's cutting unit

Wang, Huan; Sun, Dongye; Qin, Datong

doi:10.1177/0954406216649404

Cited by 26 publications

(27 citation statements)

References 21 publications

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“…The solution c has an advantage of energy saving over the schemes proposed in [7,12]. Although the optimal solution c is only verified in the typical operating mode, it can provide an energy saving advantage over the prototype TC in other operating modes as well.…”

Section: Discussionmentioning

confidence: 97%

“…A dynamic model for such a transmission was constructed. The simulation results showed that both the vibration of the drive motor and the dynamic engagement force of the gears are substantially lessened compared to those of the prototype transmission when encountering pulse loads [7]. Jo et al suggested a new input torque coupled HMPST concept, where the hydraulic elements were placed at both the mechanical and hydraulic branches.…”

Section: Introductionmentioning

confidence: 99%

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Achievement of Fuel Savings in Wheel Loader by Applying Hydrodynamic Mechanical Power Split Transmissions

et al. 2017

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Abstract:The fuel economy of wheel loaders is deeply affected by the efficiency of their propelling transmissions, however, the torque converter (TC) in existing propelling transmissions is a low-efficiency component and leads to excessive energy consumption. Accordingly, this paper replaces the TC with a hydrodynamic mechanical power split transmission (HMPST) for improving the fuel economy of wheel loader. Based on probability similarity theory, the typical operating mode for the vehicles is constructed, which is used to evaluate the energy consumption performance of the selected solutions. The four reasonable solutions, which can be initially applied to wheel loaders, are selected from among the HMPSTs using the lever diagram. Furthermore, the comparisons on efficiency and loading characteristics between these four solutions and a prototype TC are conducted. The design optimization for all the four solutions is implemented, in order to find the optimal fuel saving solution relative to the prototype TC, and only one solution with pure power split can meet the constraints. Finally, a simulation model of the wheel loader powertrain is established for validating the effectiveness of this optimal solution. The results show that the optimized solution can effectively improve the fuel economy of wheel loaders compared to the prototype TC and provides a novel substitute for current technology.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Achievement of Fuel Savings in Wheel Loader by Applying Hydrodynamic Mechanical Power Split Transmissions

et al. 2017

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“…The conventional method uses the diameter of a circle as the design variable to optimize the matching of the diesel engine and the TC [7][8][9]. However, the transmission performance of PRHTS has changed significantly compared to the prototype TC [10]. The conventional matching method is not applicable to the diesel engine and PRHTS, and it is essential to change the TC parameters.…”

Section: Introductionmentioning

confidence: 99%

Optimal matching between a diesel engine and a PRHTS transmission

Wang

Sun

2017

J Braz. Soc. Mech. Sci. Eng.

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“…Boom-type roadheader is the most important equipment in the fully mechanized excavation face, mainly used for excavation of the roadway to prepare the working face for coal mining. Due to the complexity and changeableness of the occurrence condition and physical mechanical properties of coal and rock in roadway cross-section, the hardness of coal and rock during cutting process is changing constantly and randomly; therefore the cutting head load is also continuously changing during the cutting process [7][8][9][10][11][12]. The complex and changeable cutting head load, different dip angles of coal seam, and constantly changing horizontal swing angle of cutting arm cause constant change of roadheader's body pose during the horizontal cutting process, which seriously influences the positioning and orienting excavation of the roadheader and leads to reduction in forming quality and drivage efficiency of the roadway [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Multifactor Analysis of Roadheader’s Body Pose Responses during the Horizontal Cutting Process

Zong

Zhang

Wang

et al. 2018

Shock and Vibration

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Based on the Lagrange equation in system dynamics, aiming at the horizontal cutting process, the dynamical coupling model of boom-type roadheader’s body pose was established. According to input problem of solving the model, a calculation method of the cutting head load was proposed, and the relationship between the cutting head load and pressure of the driving cylinders and swing angle of the cutting arm was obtained through simulating analysis. The simulation model was established to solve the dynamical coupling model. The cutting head load, horizontal swing angle of the cutting arm, and dip angle of coal seam were regarded as independent variables to perform changing parameter analysis in variations of the body pose. The field experiment was carried out, and the measured data is basically consistent with the simulation values. The results show that lateral displacement of the body can reach up to 6.5 cm, backward displacement can reach up to 5.2 cm, floor-based quantity can reach up to 11 cm, pitch angle of the body can reach up to 7.8°, and roll angle can reach up to 2.1°. Variations of the body pose parameters are influenced greatly by the cutting head load, while the influence from horizontal swing angle of the cutting arm and dip angle of coal seam is slighter. Among the pose parameters, floor-based quantity and pitch angle of the body vary relatively greatly, which tend to seriously influence forming quality of the roadway and should be mainly considered in deviation rectification of the roadheader’s body pose.

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A new continuously variable transmission system applied to transmission system of the roadheader's cutting unit

Cited by 26 publications

References 21 publications

Achievement of Fuel Savings in Wheel Loader by Applying Hydrodynamic Mechanical Power Split Transmissions

Achievement of Fuel Savings in Wheel Loader by Applying Hydrodynamic Mechanical Power Split Transmissions

Optimal matching between a diesel engine and a PRHTS transmission

Multifactor Analysis of Roadheader’s Body Pose Responses during the Horizontal Cutting Process

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