Analysis of the Torque Loss of High-Speed Transmission Mechanism with a Stacked Roller Set

Zhu, Ke; Ruan, Chuantan; Wang, Heyuan; Li, Sheng; Ruan, Jian

doi:10.3390/machines9080140

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…The spatial angle formed by the contact force between the taper roller and the guide rail and the axial and circumferential directions of the 2D pump is very important for the calculation of the mechanical equation, so it is necessary to firstly establish the spatial angle relationship of the roller-guide-rail mechanism [25]. Since the taper roller is affected by the guide rail in the actual working process, its posture will change slightly.…”

Section: Spatial Angle Relationshipmentioning

confidence: 99%

Optimization of Mechanical Efficiency Models for 2D Piston Pumps with a Stacked Taper Roller Set

et al. 2022

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Since the clearance between the guide rail and the roller reduces the efficiency of the 2D pump, this paper proposes a novel 2D piston pump with stacked taper roller sets to eliminate the effect of the clearance. The structure of the 2D pump is introduced, and the mathematical model of the torque and the mechanical efficiency of the bilateral force on the guide rail are established and analyzed. The model takes into account the change in the oil viscosity, the spatial angle and the oil churning loss. A test rig was built to test the mechanical efficiency under different operating conditions. The unilateral and bilateral force models of the guide rail were compared, which proved that the bilateral force model of the guide rail can predict the mechanical efficiency more accurately than the unilateral force model. In the case of high load pressure, there was a clearance between the test results and the model calculation results. It is speculated that the main reason for this is that the greater oil pressure causes the size of the contact area between the two taper rollers and between the taper roller and the guide rail to become larger. The resulting rolling friction coefficient becomes larger, which affects the mechanical efficiency.

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Section: Spatial Angle Relationshipmentioning

confidence: 99%

Optimization of Mechanical Efficiency Models for 2D Piston Pumps with a Stacked Taper Roller Set

et al. 2022

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“…For the linear velocity linearly distributed along the radial direction, the average speed of the vortex flow v rave1 is used to figure out the valid Reynolds number. The Prandtl number and convective heat transfer coefficient of the vortex flow are described in Relations ( 15) and (16).…”

Section: Heat Transfer Analysis Of Pump Cap's Headmentioning

confidence: 99%

“…Multiple studies have been carried out on 2D pumps. Ding-can Jin, Ke Zhu and Hengyuan Wang investigated its transmission [15][16][17]. Sheng-nan Shentu and Jiayuan Qian studied its flow ripple [18].…”

Section: Introductionmentioning

confidence: 99%

Heat Loss Analysis of a 2D Pump’s Transmission

Liang

et al. 2022

Machines

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Highly enhanced pump power density inevitably results in a profound rise in pump temperature, which seriously influences both power loss and service performance. Heat loss analysis is an important part of analyzing the mechanical and cooling efficiency of a 2D piston pump. This paper focuses on heat loss analysis of this pump’s transmission. Firstly, theoretical and experimental studies are carried out on the thermal–hydraulic model to investigate the heat loss of the pump’s transmission. A pump test rig is developed and thermal experiments are conducted, from 1000 rpm to 6000 rpm. Furthermore, its transient thermal simulation model is implemented with Ansys software to capture the pump’s thermal status. The test convective heat transfer coefficients and temperature data are set in the model, and the simulation results are mutually validated with the experimental ones. Finally, the transmission’s heat loss is compared with its reference churning loss formula. The distribution of the transient heat loss is 49.66% into the end cap, 27.74% into the cylinder head, 13.30% into the inner cylinder, and 9.30% into the oil. The heat loss simulation results agree with the churning loss below 4000 rpm; therefore, the transmission thermal model is accurate and efficient.

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“…To counter the effect of the inertial force of the piston motion component of the pump, two types of 2D pumps with inertia force balancing structures have been proposed [10][11][12]. Additionally, to increase the working pressure of the pump, a 2D pump with stacked rollers as driving elements has been put forward [13,14]. To reduce the flow ripple of the pump, series and parallel structures of the two pump cores have also been suggested [15,16].…”

Section: Introductionmentioning

confidence: 99%

Outlet Pressure and Flow Characteristics of a New Two-Dimensional Piston Pump with an Overlapped Distributor

et al. 2023

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This article presents the design of a two-dimensional (2D) piston pump flow-distribution port with an overlapped structure that reduces backflow in the pump chamber and pressure ripples at the pump outlet, thus minimizing vibration and noise caused by the high-frequency distribution process of a single two-dimensional (2D) piston pump. We describe the flow distribution structure and operation principle of the 2D pump, create a mathematical model of the pump chamber pressure by using the motion and flow continuity equations of the 2D piston, and use a Matlab program to compile and solve them. The influence of the flow distribution port overlap on the pump chamber pressure and the outlet flow rate was simulated. A prototype was designed and tested on a dynamic performance test bench. Our test bench results show that the flow distribution port overlap can reduce the pressure ripple at the pump outlet, which is consistent with the simulation results.

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Analysis of the Torque Loss of High-Speed Transmission Mechanism with a Stacked Roller Set

Cited by 6 publications

References 18 publications

Optimization of Mechanical Efficiency Models for 2D Piston Pumps with a Stacked Taper Roller Set

Optimization of Mechanical Efficiency Models for 2D Piston Pumps with a Stacked Taper Roller Set

Heat Loss Analysis of a 2D Pump’s Transmission

Outlet Pressure and Flow Characteristics of a New Two-Dimensional Piston Pump with an Overlapped Distributor

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