Experimental Testing of Prototype Face Gears for Helicopter Transmissions

Handschuh, Robert F.; Lewicki, David G.; Bossler, R. B.

doi:10.1243/pime_proc_1994_208_262_02

Cited by 21 publications

(12 citation statements)

References 3 publications

(3 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where t 1 , t 2 are determined by the elastic modulus and the elastic coefficient of curve-face gear pair and 2) . E 1 , E 2 are the elastic modulus of gear pair.…”

Section: Contact Area Of Curve-face Gear Pairmentioning

confidence: 99%

Loaded tooth contact analysis of curve-face gear pair

Lin

et al. 2017

Advances in Mechanical Engineering

View full text Add to dashboard Cite

As a new gear pair with variable transmission ratio, curve-face gear can be applied to percussion drill to simplify the structure. For the application of curve-face gear pair, the loaded tooth contact analysis of curve-face gear pair should be taken into consideration. According to the gear meshing theory, the mathematical equations for the tooth surface of non-circular gear and curve-face gear were derived, and the meshing equations of this gear pair were also derived. Based on the method of the principal curvatures of space curve face, the variations in principal curvatures of non-circular gear and curve-face gear were proposed separately. With the mathematical method of Boussinesq problems, the loaded tooth contact analysis of curve-face gear pair was presented. The semi-major axis and semi-minor axis of contact ellipse on the surface of curve-face gear were proposed and simulated, and the maximum contact stress on contact area and its trend with the change in meshing situation were investigated, and the principles in the half cycle were also investigated. The tooth contact paths and the calculation method for the loaded tooth contact analysis of curve-face gear pair were verified by the rolling experiment.

show abstract

“…where t 1 , t 2 are determined by the elastic modulus and the elastic coefficient of curve-face gear pair and 2) . E 1 , E 2 are the elastic modulus of gear pair.…”

Section: Contact Area Of Curve-face Gear Pairmentioning

confidence: 99%

Loaded tooth contact analysis of curve-face gear pair

Lin

et al. 2017

Advances in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…11 Shaft deformation can be calculated using the principle of material mechanics, and bearing deformation can be obtained according to literature. 12 Then, take shaft and bearing deformation into equations (1) and (2), calculate ÁU and Á of LEEA caused by axis deformation, bearing deformation and total deformation, and then the results are shown in Figures 10 to 12, respectively. If considering axis deformation only, ÁU and Á of LEEA are 0.013398 mm and 0.024519 .…”

Section: Bearing Contactmentioning

confidence: 99%

“…According to American NASA reports, face-gear drives have found an important application in splitting the torque of Apache helicopter transmissions, which manages to reduce weight by 40% and noise by 5 dB. 1,2 Loaded tooth contact analysis (LTCA) of gear drives makes use of computer technology to simulate the meshing process and performance of gear drives in actual conditions. It plays an important role in gear designing, analyzing, and manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Loaded tooth contact analysis of orthogonal face-gear drives

Wang

Gong

et al. 2012

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

In order to analyze the transmission performance of face-gear in real working condition, a calculational approach for load equivalent error of alignment has been investigated with the purpose of analyzing the support system and tooth deformation of face-gear drives. Then, the equations of contact path of loaded tooth contact analysis have been established based on load equivalent error of alignment. For the purpose of analyzing the bearing contact, the curvatures of face-gear and pinion have been presented. Tooth contact deformation and bending deformation have been developed using elasticity and three-dimensional FEA. Loaded tooth contact analysis and contact stress have been considered to simulate the contact and meshing of the gear tooth surfaces and to calculate the evolution of load distribution, bearing contact, transmission errors, and contact stresses of the gear drive along the cycle of meshing. The performed research proves that the proposed loaded tooth contact analysis method can effectively solve the meshing characteristic problem of facegear drives system. The results are illustrated with numerical examples.

show abstract

“…10,11 According to NASA reports, face-gear drive manages to reduce weight by 40% and noise by 5 dB with the application in splitting the torque of helicopter transmissions. 12 To meet the comprehensive application requirements, the various processing methods have been provided by many researchers. The thorough theoretical study of face-gear was conducted, and the computerized developments were provided in design, generation, and simulation of meshing of face-gear drive.…”

Section: Introductionmentioning

confidence: 99%

A precision generating hobbing method for face-gear based on worm hob

Wang

Hou

Lan

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

In order to improve the machining accuracy and production efficiency of face-gear, a method of face-gear generating hobbing by worm is provided in this paper. The principle of face-gear hobbing worm is analyzed, and the mathematical model of the worm is presented based on the principle and the theory of meshing. Taking the hobbing needs into account, the special machine tool is provided, and the movement control method of face-gear hobbing by the worm on the machine tool is proposed. The equation of face-gear tooth surface is calculated, and the 3-D model of face-gear is established based on CATIA software. To reduce the face-gear tooth profile errors induced by ratio errors, an error analysis model of face-gear hobbing is established. The experiment is carried out, and the completed specimen is detected by Coordinate Measuring Machining (CMM). The processing parameter is amended according to the tooth flank detection results, and the maximum normal deviation of the whole tooth surface of the face-gear specimen is improved from 243.2 µm to 61.0 µm. Experiment results demonstrate that the method of face-gear hobbing by worm is an effective approach to achieve the precision face-gear with high dimensional accuracy.

show abstract

Experimental Testing of Prototype Face Gears for Helicopter Transmissions

Cited by 21 publications

References 3 publications

Loaded tooth contact analysis of curve-face gear pair

Loaded tooth contact analysis of curve-face gear pair

Loaded tooth contact analysis of orthogonal face-gear drives

A precision generating hobbing method for face-gear based on worm hob

Contact Info

Product

Resources

About