Studies on Frictional Loss, Temperature Rise and Limiting Load for Scoring of Spur Gear

Naruse, Chotaro; Haizuka, Shoji; Nemoto, Ryozo; Kurokawa, Kazushi

doi:10.1299/jsme1958.29.600

Cited by 26 publications

(11 citation statements)

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“…Some of the present authors (4), (5) previously studied the fiiction loss of gears, but these experimental results were mairily in the higher load range, Hertzian pressure pH = 1400 ~l m m ' . Further, Yoshizaki et al (6) have reported a calculation method for friction loss of spur gear based on many experiments.…”

Section: Introductionmentioning

confidence: 72%

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Influence of Oil Viscosity, Chemical Oil Structure, and Chemical Additives on Friction Loss of Spur Gears (Concerning the Influence of Synthetic Oil and Mineral Oil)

Naruse

Nemoto

Haizuka

et al. 1994

Tribology Transactions

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The friction loss of gears and its quantitative estimation are fore, the authors carried out experiments to study the influences of important problem because of their relevance to energy comerlubricating oil viscosity and additives, as well as base oil type and vation and load-carrying capacity. Recent research results do not load and rotational speed on friction loss of spur gears. Base oil providk satisfactory estimates of friction loss of spur gears. Theretypes wed were paraffin mineral, poly-cu-olefin, and polyglycol with several oil viscosities. An EP and a mild EP additive were studied in these oils. Finally, the temperature rise of teelh of gears as a was derived.= center distance, mm = constant defined as Eq.[lo] = face width of the spur gear, mm = constant defined as Eq.[lo] = diameter of intermeshing pitch circle, mm = diameter of base circle, mm = diameter of generating pitch circle, mm = diameter of tip circle, mm = module, mm = rotational speed, rpm = torque of driver gear, N . m = transmitted power, kW = friction power loss of gear system including friction loss of bearings without load, kW = friction power loss of bearings without load, kW = friction power loss due to engagement of gear defined as Eq.[7], kW = increment of friction loss of gears due to load defined as Eq.[9], kW = friction power loss of gears without load, kW = increment of friction power loss of gear system including friction loss of bearings due to load, kW = power loss due to churning the lubricating oil, kW = total power loss including friction loss of gears and bearings, and churning loss of the lubricating oil, kW = Hertzian pressure, ~l m m~ = normal load on the tooth surface, N Rrnax = maximum height of roughness of tooth surface, k m Tm = average value of tooth temperature of driver gear and follower gear measured at the position of Fig. 2, "C Tmo = tooth temperature in the state of no load running, "C mean values of driver gear teeth temperature and follower gear teeth temperature Toil = temperature of lubricating oil at the position immediately ahead of oil nozzle, "C V = pitch line velocity of intermeshing pitch circle, m/s V I , V P = circumferential velocity of roller I and 2, respectively, Fig. A2, mls V.1. = viscosity index WI, W P . W = friction loss defined as Eq. [A3], [A4], and [A5], N . m x = addendum modification coefficient L = number of teeth a b = operating pressure angle, deg {g = friction loss due to the engagement of gears, percent &add

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Section: Introductionmentioning

confidence: 72%

“…On the other hand, the surface deterioration of gear teeth'can be avoided by adding ZDTP to the base oil. Tooth surface deteriorations, e.g:, scoring or high wear of the gear teeth surface, can be avoided by use of ZDTP in the base oils (5). For this reason, 1.0 wt.…”

Section: Lubricating Oils and Lubricating Methodsmentioning

confidence: 99%

Influence of Oil Viscosity, Chemical Oil Structure, and Chemical Additives on Friction Loss of Spur Gears (Concerning the Influence of Synthetic Oil and Mineral Oil)

Naruse

Nemoto

Haizuka

et al. 1994

Tribology Transactions

Self Cite

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“…Several authors (Ohlendorf, 1958;Eiselt, 1966;Naruse et al, 1986;Michaelis, 1987;Schlenk, 1994;Doleschel, 2002) have introduced different formulas to calculate the average coefficient of friction between gear teeth for different gear geometries. Due to the complexity of the problem, these equations are usually based in experimental results, and naturally, the results yielded by these models vary for the same operating conditions.…”

Section: Average Coefficient Of Frictionmentioning

confidence: 99%

Influence of gear loss factor on the power loss prediction

et al. 2015

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Abstract. In order to accurately predict the power loss generated by a meshing gear pair the gear loss factor must be properly evaluated. Several gear loss factor formulations were compared, including the author's approach.A gear loss factor calculated considering the load distribution along the path of contact was implemented.The importance of the gear loss factor in the power loss predictions was put in evidence comparing the predictions with experimental results. It was concluded that the gear loss factor is a decisive factor to accurately predict the power loss. Different formulations proposed in the literature were compared and it was shown that only few were able to yield satisfactory correlations with experimental results. The method suggested by the authors was the one that promoted the most accurate predictions.

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“…Several authors [3,4,8,9,11,12] have introduced different formulas to calculate the average coefficient of friction between gear teeth for different gear geometries. Due to the complexity of the problem, these equations are usually based in experimental results, and naturally, the results yielded by these models vary for the same operating conditions.…”

Section: Average Coefficient Of Frictionmentioning

confidence: 99%

Influence of Gear Loss Factor on the Power Loss Prediction

Fernandes

Marques

Martins

et al. 2014

New Trends in Mechanism and Machine Science

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It is very important to properly calculate the gear loss factor in order to predict the gears power loss. A gear loss factor calculated considering the load distribution along the path of contact was implemented. Several gear loss factors were considered in the study. Some gear loss factors don't correlate with experimental results, putting in evidence the importance of a correct value of gear loss factor.

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Studies on Frictional Loss, Temperature Rise and Limiting Load for Scoring of Spur Gear

Cited by 26 publications

References 0 publications

Influence of Oil Viscosity, Chemical Oil Structure, and Chemical Additives on Friction Loss of Spur Gears (Concerning the Influence of Synthetic Oil and Mineral Oil)

Influence of Oil Viscosity, Chemical Oil Structure, and Chemical Additives on Friction Loss of Spur Gears (Concerning the Influence of Synthetic Oil and Mineral Oil)

Influence of gear loss factor on the power loss prediction

Influence of Gear Loss Factor on the Power Loss Prediction

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