Thermal Network Model for Temperature Prediction in Planetary Gear Trains

Chen, Li Feng; Qin, Datong; Wen, Ze Jun

doi:10.4028/www.scientific.net/amm.86.415

Cited by 8 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They used a specific TNM for heat balance calculations, which correspond closely to the measurements. Further approaches to using TNMs for heat balance and temperature calculations with regard to gearboxes can be found in [26] for worm gears, [14] for hypoid gears, [4,11,19] for spur gears, [6,42] for planetary gears and [38] for helical gears.…”

Section: State Of the Artmentioning

confidence: 99%

Efficiency and heat balance calculation of worm gears

Paschold

Sedlmair

Lohner

et al. 2020

Forsch Ingenieurwes

View full text Add to dashboard Cite

Worm gears enable compact gear design and high power density due to a high gear ratio within a single gear stage. However, they often show high sliding speeds within the tooth contact, resulting in high frictional heat and increased thermal stresses. Therefore, an exact calculation regarding efficiency and heat balance is essential in the early stages of gear design. Currently, no calculation method is available to automatically analyze worm gears with regard to efficiency and heat balance. The simulation program "WTplus" is widely used to calculate the efficiency and heat balance of gearbox systems containing cylindrical and bevel gears. The efficiency is determined by adding up load-dependent and no-load power losses of gears, bearings, seals and other rotating components. The calculation of the heat balance of the gearbox is based on the heat transfer between the single components, as well as heat dissipation to the environment. A suitable abstraction of the gearbox by nodal points is conducted for an efficient and accurate calculation of local temperatures using a thermal network model. The simulation program WTplus was extended to automatically analyze the efficiency and heat balance of various designs of worm gears. For this, new approaches for the calculation of load-dependent and no-load losses, as well as new algorithms for nodalization and node-linking, were developed and implemented. Moreover, essential formulas describing the thermal resistances were customized. Simulation results were validated with measurements from research and industry showing very close alignment for various operating points and gear designs.

show abstract

Section: State Of the Artmentioning

confidence: 99%

Efficiency and heat balance calculation of worm gears

Paschold

Sedlmair

Lohner

et al. 2020

Forsch Ingenieurwes

View full text Add to dashboard Cite

show abstract

“…More recently Chen et al [4] indicated the difficulty of thermal energy dissipation from planetary gear trains due to their high-power-density design combined with their limited space. Liao et al [18] researched aspects of oil loss capability of helicopter MGB.…”

Section: Safety Design and Reliability Aspects Of Helicopter Mgb Lumentioning

confidence: 99%

Helicopter MGB oil system failure analysis using influence diagrams and random failure probabilities

Rashid

Place

Lim

et al. 2015

Engineering Failure Analysis

View full text Add to dashboard Cite

“…The finite element method is often used for the predictive simulation of temperature rise [23], but it is time-consuming to develop a reasonable finite element mesh to model the structural characteristics of the threaded teeth of a DPRS. Therefore, a thermal network method [24] was used in this study to predict the temperature rise of a DPRS.…”

Section: Temperature Rise Of Dprss and Thermal Deformation Analysismentioning

confidence: 99%

Wear Prediction Method of Differential Planetary Roller Screws Considering the Ambient Temperature Variations

Gu,

Li,

Miao

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

As a key component in fields such as high-precision machine tools, aerospace and weaponry, the thermal deformations in a differential planetary roller screw (DPRS) caused by the changes in ambient temperatures can lead to uneven load distribution and increased wear, which can seriously affect its transmission accuracy, efficiency, and service life. Therefore, the temperature rise of a DPRS at different ambient temperatures was studied using the block thermal network method, and the thermal deformations were calculated. A load distribution model of DPRS considering thermal deformation was developed, and a wear prediction method combined with surface roughness was proposed. The results show that the increase in ambient temperature has an obvious negative effect on the load distribution and wear depth of DPRS. Moreover, the DPRS temperature rise, load distribution and wear depth dramatically change with the variation of parameters such as load, speed and thread pitch. A DPRS durability test device that considers changes in ambient temperature was developed. Experiments with temperature rise and DPRS wear under different ambient temperatures were conducted to validate the theoretical analysis model.

show abstract

Thermal Network Model for Temperature Prediction in Planetary Gear Trains

Cited by 8 publications

References 7 publications

Efficiency and heat balance calculation of worm gears

Efficiency and heat balance calculation of worm gears

Helicopter MGB oil system failure analysis using influence diagrams and random failure probabilities

Wear Prediction Method of Differential Planetary Roller Screws Considering the Ambient Temperature Variations

Contact Info

Product

Resources

About