Comparison on torsional mesh stiffness and contact ratio of involute internal gear and high contact ratio internal gear

Wang, Yanzhong; Dou, Delong; Shiyuan, E; Wang, Jianjun

doi:10.1177/0954406219893721

Cited by 9 publications

(9 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The gear mesh principle and law of coordinate transformation are used to obtain addendum tooth profiles of the pinion and internal gear according to the known arc path of contact, which can be given in Equations ( 2) and (3), respectively [23,24]:…”

Section: Mathematical Equations Of Tooth Profile 221 Addendum Tooth P...mentioning

confidence: 99%

“…In this paper, the tooth profiles meshed with the addendum tooth profile of the internal gear and pinion are selected as the dedendum tooth profiles of the pinion and internal gear, respectively. The dedendum tooth profile of the pinion and internal gear are defined through Equations ( 4) and ( 5) [23,24]:…”

Section: Dedendum Tooth Profilementioning

confidence: 99%

“…Furthermore, the above methods all have limited ability to increase the gear contact ratio. To overcome this limitation, Wang et al [23,24] proposed a HCR gear-drive design approach using the directly designed path of contact, and FEM was used to study the root bending strength, surface contact strength, and meshing stiffness. A circular-arc gear refers to a point-meshing gear with a concave-convex tooth profile, in which the pinion is a convex circular-arc tooth profile and the large gear is a concave circular-arc tooth profile, which is called single circular-arc gear transmission.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of Load Capacity of High-Contact-Ratio Internal Spur Gear Drive with Arc Path of Contact

2022

Self Cite

View full text Add to dashboard Cite

Tooth root bending stress and surface contact stress are two major determinants of the load carrying capacity of gear drives. Generally, a high contact ratio has the potential to enhance the gear strength. In this paper, the basic procedures and methods for constructing a high-contact-ratio (HCR) internal spur gear pair with the arc path of the contact are presented. The effects of design and modification parameters such as deflection angle, modification angle, and addendum coefficient on gear drive are analyzed in detail based on 2D finite-element models (FEMs). A comparison of experimental and finite-element analyses (FEA) of the bending stress, contact stress, and contact ratio between HCR and involute internal spur gear drives was conducted to demonstrate the advantages of the HCR gear drive in terms of load capacity. The results show that appropriately increasing the deflection angle and addendum coefficient is beneficial for reducing bending and contact stresses. It was also observed that the bending and contact stresses of a HCR pinion are lower than those of an involute one. Moreover, the contact ratio increases with input torque.

show abstract

Section: Mathematical Equations Of Tooth Profile 221 Addendum Tooth P...mentioning

confidence: 99%

Section: Dedendum Tooth Profilementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of Load Capacity of High-Contact-Ratio Internal Spur Gear Drive with Arc Path of Contact

2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…The contact ratio is an important index to indicate the smoothness and the uniformity of the gear system's transmission load [1]. By increasing the addendum coefficient, enhancing the number of teeth, reducing the pressure angle, and adjusting the modification coefficient, an involute spur gear with a contact ratio greater than two can be obtained, called high-contact-ratio spur gear [2].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of a High-Contact-Ratio Spur Gear System with Localized Spalling and Experimental Validation

et al. 2022

View full text Add to dashboard Cite

The dynamic characteristics and tooth spalling fault features are studied for the high-contact-ratio spur gear bearing system. The bending torsional dynamic model is proposed in this study for the gear bearing system with an ellipsoid spalling fault. This model also considers time-varying meshing stiffness, tooth friction, fractal gear backlash, and comprehensive transmission error. The meshing stiffness of the system is evaluated using the potential energy method. The bifurcation diagram, time-domain waveform, Poincaré map, phase map, frequency spectrum, and related three-dimensional map are used as tools to analyze the system’s dynamic response qualitatively. The results reveal that the system’s motion with ellipsoid tooth spalling defect exhibits rich dynamic behavior. The response of the proposed dynamic model is consistent with experimental results in the frequency domain. Therefore, the developed dynamic model can predict the system’s vibration behavior with localized spalling fault. Hence, it could also provide a theoretical foundation for future spall defect diagnosis of the gear transmission system.

show abstract

“…This enhances endurance life and the load carrying capacity of HCR gear compared to NCR for same weight and volume. Recent studies 42, 43 states the necessity of HCR drives but only limited studies are available in the literature with regard to HCR drives. Individually the performance studies of HCR drives are available in literature for calculating the stress, profile modifications, dynamic responses but estimation of the gear loss factor for a profile modified HCR spur gears is yet to be studied.…”

Section: Introductionmentioning

confidence: 99%

Load share model based gear loss factor prediction in high contact ratio spur gear drive

Ravivarman

Sekar

2022

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

Gear loss factor is considered to be a crucial parameter, and is governed by factors like contact load, sliding velocity, contact ratio, etc. Sliding power loss is a function of the gear loss factor and friction coefficient. It depends on the contact tooth load and its contact surfaces. A small decline in the gear loss factor and variation in the friction coefficient reduces the energy consumption which improves gear efficiency significantly. Hence, accurate prediction of the gear loss factor is important. This paper deliberates on measuring the contact load of High Contact Ratio (HCR) non-standard gear drive, using the finite element contact model. The input for the gear loss factor is obtained from a 2D elastic contact model using ANSYS. In the previous works the load is considered as a rigid hypothetical element, but in the real case it is varying at each instantaneous contact point. To address this, a more accurate method of predicting the power loss using the contact load share model is proposed. The effectiveness of this technique, built on the computational data and its accuracy are examined. Based on the accuracy, the load share model was suggested to be the most effective one compared to other techniques. The results show that the proposed model provides an effective tool for making reliability assessments on power loss and efficiency of high contact ratio gear drives under diverse operating conditions.

show abstract

Comparison on torsional mesh stiffness and contact ratio of involute internal gear and high contact ratio internal gear

Cited by 9 publications

References 38 publications

Investigation of Load Capacity of High-Contact-Ratio Internal Spur Gear Drive with Arc Path of Contact

Investigation of Load Capacity of High-Contact-Ratio Internal Spur Gear Drive with Arc Path of Contact

Dynamic Analysis of a High-Contact-Ratio Spur Gear System with Localized Spalling and Experimental Validation

Load share model based gear loss factor prediction in high contact ratio spur gear drive

Contact Info

Product

Resources

About