Increasing the Resistance of Scuffing for HCR External Helical Gearing

This paper gives a general account of gear dynamic tooth loads and noise. Experimental work in progress is used to illustrate the steps in a dynamic analysis of a gear system. The nature and specification of the excitation sources at the tooth contact, and the generation of tooth contact frequency components and of their sidebands for spur and helical gearing are described, together with the vibrational and acoustic responses and the correlation between excitation and response. The analysis indicates how control of dynamic load and noise can be achieved.

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Paper 13: Choice of Tooth Type for High-Speed Gearing

Proceedings of the Institution of Mechanical Engineers Conference Proceedings ◽

10.1243/pime_conf_1969_184_448_02 ◽

1969 ◽

Vol 184 (15) ◽

pp. 105-110 ◽

Cited By ~ 1

Author(s):

R. J. Hicks

Keyword(s):

High Speed ◽

Geometric Analysis ◽

Spur Gears ◽

Constant Ratio ◽

Dynamic Effects ◽

Helical Gears ◽

Tooth Type ◽

Pros And Cons ◽

Helical Gearing ◽

Very High

The paper considers the pros and cons of spur, single, and double helical gearing. A detailed geometric analysis of the basic load capacities of helical and spur gears, respectively, leads to non-dimensional optimum tooth numbers for each type, having a constant ratio to one another irrespective of size and material. Helical gears are shown to require the same volume as spurs but relatively coarser teeth. Consideration of the possible dynamic effects of characteristic errors leads to the conclusion that spur gears are potentially superior for very high speed applications.

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Erratum to: Increasing the Resistance of Scuffing for HCR External Helical Gearing

New Advances in Mechanism and Machine Science - Mechanisms and Machine Science ◽

10.1007/978-3-319-79111-1_53 ◽

2018 ◽

pp. E1-E1

Author(s):

M. Rackov ◽

M. Čavić ◽

M. Penčić ◽

M. Vereš

Keyword(s):

Helical Gearing

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ANALYSIS OF METHODS FOR CALCULATING SPUR GEAR FOR DEEP CONTACT STRENGTH

Architecture, Construction, Transport ◽

10.31660/2782-232x-2021-3-90-97 ◽

2021 ◽

pp. 90-97

Author(s):

Sergey Yu. Lebedev ◽

Keyword(s):

Heat Treatment ◽

Limit State ◽

Experimental Studies ◽

Spur Gear ◽

Inhomogeneous Material ◽

Contact Strength ◽

Chemical Heat Treatment ◽

Chemical Heat ◽

Helical Gearing

Spur gear is an integral part of transport and technological machines structure. To increase the load ability of the spur gear, chemical heat treatment of the working cogs surfaces is used. Spur gear with chemical heat treatment must be checked for deep contact strength. The article analyzes various methods (according to GOST 21354-87, methods using the generalized criterion of the limit state for structurally inhomogeneous material by Lebedev-Pisarenko, methods from the handbook describing reducers of power machines etc.) for calculating spur and helical gearing for deep contact strength. The author presents all necessary formulas and graphs for the implementation of each methods, and compares the calculations results of these methods with the results of experimental studies of cemented cylindrical rollers for deep contact destruction.

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Experimental Research on the Vibration and Noise Behavior of Helical Gearing System

Volume 4: 9th International Power Transmission and Gearing Conference, Parts A and B ◽

10.1115/detc2003/ptg-48028 ◽

2003 ◽

Cited By ~ 1

Author(s):

Kohei Saiki ◽

Takeshi Watanabe ◽

Terushige Sato

Keyword(s):

Great Influence ◽

Design Stage ◽

Actual Measurement ◽

Gear Noise ◽

3 Dimensional ◽

Resonance Modes ◽

Exciting Vibration ◽

Helical Gearing ◽

The Relationship ◽

Transverse Axial

Going with interior noise reduction in a vehicle, gear noise that is of pure frequency has been becoming a great influence on the comfortable driving. For decreasing the gear noise, it is important to predict precisely the gear noise behavior at the design stage before manufacturing. Therefore, it is necessary to clarify the physical mechanism of each resonance noise peak by actual measurement in the wide condition range of rotation speed and transmitting torque. In this research, a new 85kw oil-cooled motoring apparatus (Max speed: 6000rpm/135Nm, Max torque 400Nm/2000rpm) is developed for measuring the 3-dimensional (transverse, axial, rotational, and tilting) vibration of rotating gear blank. Also, the 3-directional (X, Y, and Z) vibration of the bearing’s holder, and the radiated gear noise are measured at the same time. As the result, the relationship between exciting vibration of rotating gear blank and the responding vibration of the bearing’s holder is carried out. The different effect upon the radiated gear noise of various vibration resonance modes is also investigated. Especially, some new interesting vibration modes, such as the drive and driven gears vibrate individually or synchronously, are found. Lastly, the mechanism of several resonance peaks which frequently causing the gear noise problems from slow city driving to fast highway operation, is conjectured concisely.

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