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Lubricants
Special Issues
Tribology and Reliability of Mechanical Transmission
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Tribology and Reliability of Mechanical Transmission

A special issue of Lubricants (ISSN 2075-4442).

Deadline for manuscript submissions: closed (28 February 2023) | Viewed by 14709

Special Issue Editors

Prof. Dr. Yuxing Peng

E-Mail Website
Guest Editor
School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China
Interests: tribology of mechanical transmission
Prof. Dr. Chenbo Ma

E-Mail Website
Guest Editor
School of Mechanical and Electrical Engineering, Nanjing Forestry University, Nanjing 210037, China
Interests: tribology; surface texturing; mechanical seals
Dr. Hao Lu

E-Mail Website
Guest Editor
School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China
Interests: reliability of mechanical products
Prof. Dr. Wei Tang

E-Mail Website
Guest Editor
School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China
Interests: special robot technology; brain controlled robot technology; intelligent cutting of mining equipment; friction and lubrication theory and technology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Mechanical transmission components are important components to ensure the safe and reliable operation of mechanical equipment. Mechanical transmission includes friction traction transmission (flexible cable transmission—steel wire rope, belt, etc.), gear transmission, etc. The transmission process involves friction, wear and lubrication of contact parts, which affect the transmission reliability.

Friction contact pairs of mechanical transmission components mainly include gear contact pair, wire rope-roller contact pair, wire rope contact pair, bearing roller contact pair, belt drive contact pair, chain drive contact pair, etc. Their structural shape, contact form, material and operating conditions are different, which leads to different corresponding friction, wear and lubrication mechanisms. At present, the mechanism of friction, wear and lubrication, and the transmission reliability under wear and lubrication failure modes between mechanical transmission friction pairs in different fields have always been the hot research topic in the mechanical transmission field.

The current Special Issue aims at bringing together, in the same issue, contributions from world-leading scientists working in the fields of tribology and reliability of mechanical transmission, with the goal being to favour “contamination” of knowledge from the two fields to deepen our understanding of engineering regarding tribology and reliability of mechanical transmission. Contributions are welcome from all scientists working in tribology, reliability, and related areas.

Prof. Dr. Yuxing Peng
Prof. Dr. Chenbo Ma
Dr. Hao Lu
Prof. Dr. Wei Tang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Lubricants is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • friction
  • wear
  • lubrication
  • reliability
  • mechanical transmission

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Published Papers (5 papers)

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Research

17 pages, 4659 KiB  
Article
An Improved Load Distribution Model for Gear Transmission in Thermal Elastohydrodynamic Lubrication
by Ruxin Lu, Wencheng Tang, Qi Huang and Junjie Xie
Lubricants 2023, 11(4), 177; https://doi.org/10.3390/lubricants11040177 - 12 Apr 2023
Cited by 5 | Viewed by 1916
Abstract
The gear drive generally operates in elastohydrodynamic lubrication (EHL) contacts, and the existence of oil film effectively reduces wear and improves transmission stability. However, little research has been devoted to studying the effect of lubrication characteristics on load distribution of gear transmissions. In [...] Read more.
The gear drive generally operates in elastohydrodynamic lubrication (EHL) contacts, and the existence of oil film effectively reduces wear and improves transmission stability. However, little research has been devoted to studying the effect of lubrication characteristics on load distribution of gear transmissions. In order to investigate the coupling effect between the lubrication behavior and load distribution, an analytical load distribution model suitable for EHL contact spur gear pairs is proposed. The non-Newtonian transient thermal EHL solution, flexibility of meshing teeth, structural coupling deformation of the gear body and extended tooth contact are considered in the deformation compatibility condition for iteratively solving the load distribution. A parametric analysis is performed to determine the influence of load torque and rotation speed on load sharing ratio and loaded static transmission error. The transient lubrication behaviors based on the proposed load distribution model is compared with that obtained from the traditional model. A series of comparisons with different models demonstrated the correctness, significance and generality of the present model. The results show that it is necessary to consider the thermal EHL calculation into the iterative solution procedure of load distribution model for EHL contact gear pairs. The proposed model is a useful supplement for an accurate study of thermal EHL characteristics of gear transmissions. Full article
(This article belongs to the Special Issue Tribology and Reliability of Mechanical Transmission)
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11 pages, 4055 KiB  
Article
Effects of Hybrid Rockwool–Wood Fiber on the Performance of Asbestos-Free Brake Friction Composites
by Nan Wang, Hao Liu and Fei Huang
Lubricants 2023, 11(1), 27; https://doi.org/10.3390/lubricants11010027 - 10 Jan 2023
Cited by 5 | Viewed by 1761
Abstract
The present study explores the physical-mechanical and tribological properties of hybrid wood fiber and rockwool-reinforced asbestos-free resin-based friction materials. We developed asbestos-free brake friction composites with different contents of hybrid fiber (wood and rockwool fiber) at a total fixed fiber loading of 30%. [...] Read more.
The present study explores the physical-mechanical and tribological properties of hybrid wood fiber and rockwool-reinforced asbestos-free resin-based friction materials. We developed asbestos-free brake friction composites with different contents of hybrid fiber (wood and rockwool fiber) at a total fixed fiber loading of 30%. Then, the developed composites were investigated on the physical, mechanical, and tribological properties according to the industry standards. The results show that, with the increase in wood fiber, the density, hardness, and strength decrease, and the water absorption increases. Meanwhile, rockwool fiber can improve the coefficient of friction and enhance friction stability, while wood fiber has a significant impact on wear resistance. The sample with 5% wood fiber and 25% rockwool fiber presented the best performance in terms of the coefficients of friction, wear rate, and fade–recovery behavior. It provides a new idea for the research of asbestos-free composites. Full article
(This article belongs to the Special Issue Tribology and Reliability of Mechanical Transmission)
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19 pages, 6399 KiB  
Article
Friction and Wear Behavior between Crane Wire Rope and Pulley under Different Contact Loads
by Xiangdong Chang, Xiao Chen, Yaoyuan Dong, Hao Lu, Wei Tang, Qing Zhang and Kun Huang
Lubricants 2022, 10(12), 337; https://doi.org/10.3390/lubricants10120337 - 29 Nov 2022
Cited by 3 | Viewed by 6383
Abstract
Surface wear caused by contact between crane wire rope and a pulley seriously affects the mechanical properties of the wire rope. In this study, the tribological behavior of wire rope was investigated using a homemade rope–pulley sliding friction test rig. Then, the influence [...] Read more.
Surface wear caused by contact between crane wire rope and a pulley seriously affects the mechanical properties of the wire rope. In this study, the tribological behavior of wire rope was investigated using a homemade rope–pulley sliding friction test rig. Then, the influence of different surface wear on the bending fatigue life of the rope samples was analyzed. The results show that the friction coefficient (COF) decreases with the increasing sliding distance. It reaches a minimum of approximately 0.52 when the contact load is 700 N. The surface temperature of the wire rope rises rapidly and then gradually stabilizes. The maximum temperature rise fluctuates in the range of 50 °C to 60 °C with increasing contact load. The wear scar of the wire rope is irregular, and the maximum wear width increases from approximately 1.94 mm to 2.45 mm with the contact load. Additionally, increased contact load leads to smoother wear surface of wire rope, and the wear mechanisms are mainly abrasive wear and adhesive wear. Additionally, surface wear leads to a decrease in the bending fatigue life of wire ropes, and degradation of anti-bending fatigue is more serious under a larger sliding contact load. Full article
(This article belongs to the Special Issue Tribology and Reliability of Mechanical Transmission)
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13 pages, 3492 KiB  
Article
The Influence of Mullite Shape and Amount on the Tribological Properties of Non-Asbestos Brake Friction Composites
by Nan Wang and Zixin Yin
Lubricants 2022, 10(9), 220; https://doi.org/10.3390/lubricants10090220 - 10 Sep 2022
Cited by 4 | Viewed by 1658
Abstract
For investigating the effect of mullite as a reinforced fiber of the non-asbestos brake friction material on the performance of brake pads, mullite reinforced composites with different contents (5% and 10%) and shapes (powder-based and fiber-based) were developed, and the physical and mechanical [...] Read more.
For investigating the effect of mullite as a reinforced fiber of the non-asbestos brake friction material on the performance of brake pads, mullite reinforced composites with different contents (5% and 10%) and shapes (powder-based and fiber-based) were developed, and the physical and mechanical properties of the composites were analyzed. The tribological properties of the composites were tested by a Chase tester followed by the IS-2742 standard, and the worn surface was investigated by three-dimensional surface topography and SEM. The results show that the brake friction material with 5% powdered mullite performs best, having the highest stable friction performance (0.86), the lowest wear rate (3%), the lowest friction variation performance (0.263), and the best fade-recovery performance. With the increase of mullite content, the friction variation, wear resistance, and friction stability of the composites become worse. Meanwhile, the performance of powder-based mullite composites is better than that of fiber-based. The worn surface analysis shows that the fiber-based mullite composite has a higher surface roughness, fewer contact platforms, more wear debris, and peeling pits. In contrast, the powder-based mullite composites have a better surface performance. It provides a practical basis for mullite-reinforced non-asbestos brake friction materials. Full article
(This article belongs to the Special Issue Tribology and Reliability of Mechanical Transmission)
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16 pages, 2964 KiB  
Article
Study on Tribological Characteristics of Textured Surface under Convergent Oil Film Gap
by Guangyao Bei, Chenbo Ma, Xilong Wang, Jianjun Sun and Xingya Ni
Lubricants 2022, 10(8), 183; https://doi.org/10.3390/lubricants10080183 - 11 Aug 2022
Cited by 9 | Viewed by 1761
Abstract
Under the condition of convergence, a textured non-parallel 2D slider bearing model was established, and the tribological properties of textured surface under the convergence gap were numerically studied with the load-carrying capacity as an indicator. Firstly, whether the convergence ratio parameter can accurately [...] Read more.
Under the condition of convergence, a textured non-parallel 2D slider bearing model was established, and the tribological properties of textured surface under the convergence gap were numerically studied with the load-carrying capacity as an indicator. Firstly, whether the convergence ratio parameter can accurately characterize the joint effects of film thickness difference and oil film thickness on the surface tribological properties was verified, and the effects of film thickness difference and oil film thickness on the load-carrying capacity of textured and non-textured surface were studied, respectively. The results show that the efficiency of improving the load-carrying capacity of the surface structure first increases and then decreases with the increase of the oil film thickness. In the case of large film thickness difference, the surface texture will reduce the efficiency of improving the load-carrying capacity. In addition, the effects of texture depth, texture width, and sliding velocity on the load-carrying capacity under the convergence gap are also studied. In particular, an optimal texture width to maximize the load-carrying capacity exists. Full article
(This article belongs to the Special Issue Tribology and Reliability of Mechanical Transmission)
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