Jiangsu Rongtianle Machinery Co.

Changzhou, China

Jiangsu Rongtianle Machinery Co.

Changzhou, China
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Zhou Q.,East China University of Science and Technology | Li Z.M.,East China University of Science and Technology | Sang S.J.,East China University of Science and Technology | Tang J.P.,Jiangsu Rongtianle Machinery Co. | An Q.,East China University of Science and Technology
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology | Year: 2012

A numerical simulation method is proposed to analyse the hydrodynamic lubrication performances of lip seal based on surface topography of sealing lip and shaft, lip interference, lip deformation, etc. The method, which can simulate the lubrication characteristics of lip seal under different interferences, is more reasonable than other existing methods. The proposed method was applied to auto water pump bearing's seal. The surfaces of sealing lip and shaft are modelled, and the maximum film pressure, the average film pressure, the minimum film thickness, the average film thickness, and the friction on lip surface of stable working stage are calculated. The relationship between the lubrication characteristics and initial interference are obtained. The results will be very helpful for lip interference determination and optimization of auto water pump bearing's seal. © 2011 Authors.


Zhou Q.,East China University of Science and Technology | Li Z.,East China University of Science and Technology | Tang J.,Jiangsu Rongtianle Machinery Co. | An Q.,East China University of Science and Technology
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology | Year: 2013

A numerical thermoelastohydrodynamic simulation method is proposed in this article with the considerations of the topography of sealing lip and shaft, interference of sealing lip, the elastic deformation of sealing lip and the influence of temperature on the viscosity of lubricant. The proposed method is applied to WR auto water pump bearing seal to study the lubrication and sealing property of lip seal, and the relationships between the lubrication property of lip seal and interference, rotation speed in given working condition are obtained. © IMechE 2013.


Li Z.,East China University of Science and Technology | Zhou Q.,East China University of Science and Technology | Tang J.,Jiangsu Rongtianle Machinery Co. | Wang J.,East China University of Science and Technology | An Q.,East China University of Science and Technology
Journal of Tribology | Year: 2012

Taking the water pump bearing with one roller row (WR)-type auto water pump bearing as a research sample, an analytical calculation method is developed to improve the accuracy and efficiency of the current calculations for the bearing loads and life in engineering application. Considering the misalignment due to the deflection of the bearing spindle, the bearing internal loads and deformations under the action of the complicated external space loads are obtained. The bearing fatigue life including the lives of the rollers and the balls is also calculated with considering the non-normal load distribution caused by the spindle deflection and the roller tilt. The bearing load and life calculation results are compared with those calculated by the traditional method in which the deflection of the bearing spindle and the roller tilt are ignored. The effects of the bearing spindle deflection on the load distribution and the life of the auto water pump bearing are analyzed and discussed. The life decrease in the auto water pump bearing is significant due to the deflection of the bearing spindle and it is recommended to give more attention to this deflection for the high quality of the bearing design and calculation. © 2012 American Society of Mechanical Engineers.


Zhou Q.,East China University of Science and Technology | Li Z.-M.,East China University of Science and Technology | Tang J.-P.,Jiangsu Rongtianle Machinery Co. | An Q.,East China University of Science and Technology
Huadong Ligong Daxue Xuebao/Journal of East China University of Science and Technology | Year: 2012

A numerical calculation model is proposed to analyze the hydrodynamic lubrication performances of lip seal based on such properties as sealed pressure, surface morphology of sealing lip and shaft, lip interference, lip deformation, etc. The model can effectively simulate the lubrication characteristics of lip seal under different sealed pressures and with various interferences, which is more reasonable than existing models. Applying the proposed simulation model to WR auto water pump bearing s seal of Rongtianle Machinery Co. Ltd, the maximum film pressure, the average film pressure, the minimum film thickness, the average film thickness and the friction on sealing lip under stable working stage are calculated. Moreover, these parameters are used to analyze the relationship of lubrication characteristics and initial interferences, sealed pressure.


Zhou Q.,East China University of Science and Technology | Li Z.-M.,East China University of Science and Technology | Tang J.-P.,Jiangsu Rongtianle Machinery Co. | An Q.,East China University of Science and Technology
Huadong Ligong Daxue Xuebao/Journal of East China University of Science and Technology | Year: 2013

The dynamic model of bearing-rotor-sealing system is established by applying transfer matrix method with the rotor of centrifugal fan taken as an object. The calculation method for contact rigidity, film rigidity and film damping of lip seal is constructed. The natural frequency, attenuation coefficients and modal shape of bearing-rotor-sealing system's vibration are calculated and analyzed, as well as the influences of eccentric of impeller and belt wheel on the unbalance response amplitude of the system. The effect of interference of lip seal and shaft eccentricity on the vibration performance of bearing-rotor-sealing system is studied. The research of this manuscript can provide theoretical basis on the dynamics performance of bearing-rotor-sealing system.


Zhou Q.,East China University of Science and Technology | Li Z.-M.,East China University of Science and Technology | Tang J.-P.,Jiangsu Rongtianle Machinery Co. | Xu Z.-M.,Jiangsu Rongtianle Machinery Co. | An Q.,East China University of Science and Technology
Huadong Ligong Daxue Xuebao/Journal of East China University of Science and Technology | Year: 2011

The performance of automotive water pump bearing seal is closely related with the magnitude of interference of the sealing lip. In this paper, mechanics of material and Hertz contact theory were applied to develop the model for calculating the contact stress distribution on seal and shaft surfaces, and used this model to analyze the relationship between the contact stress distribution and sealing lip s interference. Micro-surface morphology of the shaft was simulated by taking advantage of the adaptive correlation function, moreover the alternating stress of sealing lip led by the surface micro-asperities were calculated within one revolution of the rotating shaft. The fatigue life prediction method of the seal was constructed according to rain-flow counting method and fatigue life calculation method, meanwhile the fatigue lives of the seal with different lip interferences were calculated. The present study can provide theoretical support for further research and application of the sealing technology of automotive water pump bearing.


Li Z.-M.,East China University of Science and Technology | Zhou Q.,East China University of Science and Technology | Tang J.-P.,Jiangsu Rongtianle Machinery Co. | An Q.,East China University of Science and Technology
Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics | Year: 2012

The loading, elastic deformation and hydrodynamic film effect at each rolling element-raceway contact of automobile water pump bearing are analyzed. Based on this analysis, the total radial stiffness, angular stiffness and radial damping of the two rolling element rows are modelled. These stiffness and damping are taken into the transfer matrix to evaluate the lateral vibration characteristics of a rotor-automobile water pump bearing system. The natural frequencies, mode shapes and unbalance responses of the system are calculated. The effects of the pulley and fan unbalances on the system response under different spindle speeds are studied. The calculation results show that the unbalance response of the system can be reduced by fixing the pulley and fan with the initial phase difference between their unbalances to be 180°, and by increasing the pulley unbalance appropriately when keeping the fan unbalance constant. © IMechE 2012.

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