In high precision and heavily loaded spur gears the effect of gear errors is negligible, so the periodic variation of tooth stiffness is the principal cause of noise and vibration. High contact ratio spur gears could be used to exclude or reduce the variation of tooth stiffness.
(PDF) An improvement on helicopter transmission An improvement on helicopter transmission performance through use of high contact ratio spur gears with suitable profile modification design transmission error, contact ratio isolation and
To achieve the benefits of High Contact Ratio Spur Gears (HCRG), its tolerance to manufacturing errors and elastic deformation has to be increased. After various attempts by previous researchers, double scope tooth profile modifications have been seen as being of major interest showing great potential for improvements in most applications.
A Study of the Relationship Between the Dynamic Factors Dynamic Analysis of Spur Gear Pairs:Steady-State Response and Stability of the SDOF Model With Time-varying Mesh Damping Mech. Syst. Signal Process. 0888-3270,
A new type of profile relief for high contact ratio spur gearsThe second of a series of papers on the systematic approach to the profile relief design of both low contact ratio (LCR) and high contact ratio (HCR) spur gears and its effects on transmission
Design ofHigh Contact Ratio Spur Gears Cut With StandardTools Evg,ueni Podzharo·y and A'imanta!s M'ozuras Fig"re I-Colltact ratios of HCR gears cut with a slaridard rack 1001of 200 gears by two and then simultaneously introducing pressure allgle. a negative displacement of the gear tooth profile 34 JULY/AUGUST 2003: GIEAR TE'CHINOl'DG'I' wlww.g.earte,r;.hmllogy.(uJm' powertr
Evaluation of Methods for Calculating Effects of Tip usually achieved in spur gears by using involute profiles on the teeth. But due to their ability to transmit large loads, the Evaluation of Methods for Calculating Effects of Tip Relief on Transmission Error, Noise and Stress in Loaded Spur Gears Dr. David Palmer and Dr. Michael Fish
Load sharing model for high contact ratio spur gears with Aug 21, 2019 · Specifically, long tip relieves, beyond the interval of minimum tooth pair contact, which are unsuitable for standard contact ratio spur gears, may reduce drastically the load at the inner points of the path of contact of high contact ratio gears, though a peak of load arises at the outer interval of two pair tooth contact.
Aug 21, 2019 · Specifically, long tip relieves, beyond the interval of minimum tooth pair contact, which are unsuitable for standard contact ratio spur gears, may reduce drastically the load at the inner points of the path of contact of high contact ratio gears, though a peak of load arises at the outer interval of two pair tooth contact.
Research on the variation of mesh stiffness and For a spur gear pair, because of the existion of tooth profile modification, the actual tooth profile is not ideal as shown in Fig. 3.The corresponding contact condition is shown in Fig. 4.It can be seen that, under unloaded conditions, the tooth profile modification will make the additional separation appear.
Some Analytical Results on Transmission Errors in Narrow Influence of Linear Profile Modification and Loading Conditions on The Dynamic Tooth Load and Stress of High-Contact-Ratio Spur Gears ASME J. Mech. Des. 0161-8458,
A similar method was used to analyze the fillet stress of one-sided involute asymmetric gear  and conjugated spur gears [14,20], the contact stress of high contact ratio spur gears , and
The effects of the shape of tooth profile modifications on Yildirim, N. , Some guidelines on the use of profile reliefs of high contact ratio spur gears Proc. IMechE, Part C:J. Mechanical Engineering Science 219 C10:1087 1095 DOI:10.1243/095440605X31977. Google Scholar
high contact ratio - Articles, News and Company results high contact ratio - Search Results Articles About high contact ratio. Articles are sorted by RELEVANCE. Sort by Date.. 1 A Further Study on High-Contact-Ratio Spur Gears in Mesh with Double-Scope Tooth Profile Modification (November/December 2008). This paper will demonstrate that, unlike commonly used low-contact-ratio spur gears, high-contact-ratio spur gears can provide
Translate this pageA previously developed model for the load sharing ratio and quasi-static transmission error, based on the hypothesis of equal delay interval in all the teeth in simultaneous contact, has been used. The simple formulation of the model allows to obtain the equation of the required profile modification to ensure a preestablished function of load