Locus of lubricating weak point for the toroidal surface enveloping cylindrical worm drive

Cui, Jian; Zhao, Yaping; Mu, Shibo; Li, Gongfa; Chen, Xinyuan

doi:10.1002/ls.1621

Cited by 3 publications

(3 citation statements)

References 29 publications

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“…As shown in figure 4, the meshing area on the tooth surface S 2 of Archimedes worm wheel is the zone surrounded by the tooth top boundary A B C and the worm addendum A C . Namely, the worm addendum A C is the actual tooth root of the worm wheel [32,47]. The undercutting limit line L s and the meshing limit line L m intersect at a point P sm .…”

Section: (B) Numerical Outcome Of Singular Point For Non-undercutting...mentioning

confidence: 99%

Direct method to determine singular point of enveloped surface and its application to worm wheel tooth surface

Cui,

Zhao,

Meng

et al. 2024

Proc. R. Soc. A.

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A novel methodology for determining the singular point of an enveloped surface is put forward. Unlike some existing methods, the presented method starts directly from the equation of the enveloped surface instead of that of the generating surface, and it is thus called a direct method. The calculation for the normal vector of the enveloped surface is well simplified with the help of the moving frame approach, which makes the presented method feasible. The singularity condition equation is extracted by using the theory of linear algebra. For singular points with different properties, proper solving techniques are established, including resultant elimination and simple elimination. Applying the developed method, the undercutting characteristics of the Archimedes worm wheel are investigated from the perspective of spatial meshing. The numerical results demonstrate that the worm wheel generally has one undercutting limit line, whose trend is along the tooth width of the wheel. Locating on one side of the tooth surface and near the tooth root is a dangerous part of the worm wheel undercutting. The proposed method is beneficial for the development of gear meshing science.

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Section: (B) Numerical Outcome Of Singular Point For Non-undercutting...mentioning

confidence: 99%

Direct method to determine singular point of enveloped surface and its application to worm wheel tooth surface

Cui,

Zhao,

Meng

et al. 2024

Proc. R. Soc. A.

Self Cite

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show abstract

“…González-Rey(2023) investigated the impact of lubricants on efficiency of worm gear transmissions, demonstrated that synthetic oils outperform mineral oils in oil-immersed lubrication systems. Cui et al(2023) proposed that when the angle between the velocity of relative motion and the normal direction to the contact line approaches 0°, the formation of a lubricant film at the corresponding transient meshing point improves enhances lubrication conditions. evaluated the lubrication characteristics of gearing by identifying lubrication weaknesses through the lubrication angle.…”

Section: Introductionmentioning

confidence: 99%

Meshing performance investigations on oblique worm drive

YANG,

CHEN,

GAO

et al. 2024

JAMDSM

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This paper proposed an innovative approach to oblique worm drive by introducing a specific inclination angle. The investigation focused on the meshing performance of oblique ZA worm drive by varying the crossed axis angle. The meshing geometric models of oblique ZA worm drive are deduced, and the derivation of the lubrication angle along with the induced normal curvature calculation formula are proposed. The tooth-face contact conditions for different worm gears with various inclination angles are analyzed, and lubrication angles and induced normal curvatures are presented. To verify the numerical analysis, a simulation analysis was conducted for the oblique ZA worm drive with an inclination angle of 10°, and the results confirmed the conclusions drawn from the numerical analysis. A comparative test was performed between the transmission efficiency of the oblique and standard ZA worm drive reducer. The results demonstrated that the oblique ZA worm drive exhibited strengthened transmission efficiency and load carrying capacity.

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“…The EHL of roller enveloped worm drive was studied by QI [10] under the different roughness amplitudes. The nonlinear equation system to determine the lubricating weak point is established by utilising the lubrication angle of toroidal surface enveloping cylindrical worm drive [11], the current research is an application of EHL on worm drive.…”

Section: Introductionmentioning

confidence: 99%

Thermal Elastohydronamic Lubrication Characteristics of Inclined Double-roller Enveloping Hourglass Worm Drive

Wen

Liu

2023

J. Phys.: Conf. Ser.

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To grasp thermal elastohydrodynamic lubrication (TEHL) characteristics of the conjugating tooth-pairs of inclined double-roller enveloping hourglass worm drive in transmission process. The numerical solutions of line contact thermal EHL were obtained based on meshing theory of this worm drive and the theory of EHL. The TEHL line contact numerical solution of this worm drive is solved by using the multigrid method, and the TEHL film pressure and thickness are got at the same time. The effects of roller radius, offset distance, orifice coefficient and inclined angler on the TEHL characteristics and temperature rise are analysed and compared. The results show that with the increase of roller radius, offset distance and inclined angler, the secondary pressure peak decreases and moves to the outlet region, and the oil film thickness decreases accordingly, with increase in orifice coefficient the second pressure peak rises and move toward the inlet, the film thickness increases. The maximum temperature rises of film, worm and worm gear contact surface reduce as the roller radius, orifice coefficient and inclined angler increase, rose as the offset distance increases. It can reduce temperature rise and improve the oil film thickness thought the optimization calculation in the design.

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Locus of lubricating weak point for the toroidal surface enveloping cylindrical worm drive

Cited by 3 publications

References 29 publications

Direct method to determine singular point of enveloped surface and its application to worm wheel tooth surface

Direct method to determine singular point of enveloped surface and its application to worm wheel tooth surface

Meshing performance investigations on oblique worm drive

Thermal Elastohydronamic Lubrication Characteristics of Inclined Double-roller Enveloping Hourglass Worm Drive

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