http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Chengyi Pan (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Study on microstructure wear reduction performance and life prediction of unfolding wheel
Chengyi Pan,Jiahao Chang,Chuan Wang,Yanguang Gu 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.3
The unfolding wheel for testing steel ball is apt to wear. Manufacturing microstructure at its surface is a method to reduce wear. Firstly, friction and wear experiments were conducted with load and microstructure area as variables. The friction coefficients and wear mass of the specimens were measured. The friction and wear performance of the microstructure surface is studied by analyzing the data trend of friction coefficient and wear mass. Then, the mechanism on wear resistance of microstructure surface is analyzed. The mathematical model of wear is deduced based on the Archard wear model. The finite element simulations of wear of microstructure surface and smooth surface were conducted through ANSYS software respectively. Finally, the equation relationship between the unfolding wheel life and the number of wear is established by fitting the data from the simulation results using MATLAB. The predicted result shows that the unfolding wheel life of the microstructure surface is about 26.5 % longer than that of the smooth surface.
-
Study on design and simulation of a novel isolator cylindrical roller bearing
Chengyi Pan,Chuan Wang,Yanling Zhao,Guanqun Cao 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.8
The sliding friction of the cylindrical roller bearing makes the internal resistance of the bearing large. Thus, this paper proposes to replace the cage with rolling isolators being placed between the cylindrical rollers, making the rub of all the elements be rolling friction. Therefore, the driving torque of the bearing is greatly reduced. First, the structure and working principle of this kind of bearing are described, the geometric parameter relationship of the roller and the isolator is analyzed, the feasible range of the parameters of the isolator is deduced based on the NFL203V type cageless bearing is proposed. Then, the ADAMS software is used for motion simulation of this novel cylindrical roller bearing. The best design plan is obtained through a comparison of the different schemes. Finally, experiments of bearing temperature are conducted, which shows the working temperature of the isolator cylindrical roller bearing is lower than that of the traditional roller bearings.
-
Discrete theory of rolling elements for a cageless ball bearing
Yanling Zhao,Qiyu Wang,Mingzhu Wang,Chengyi Pan,Yudong Bao 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.4
For the case of magnetic levitation loss, the rotor of an active magnetic bearing is forced by gravity to drop onto stator laminations, and cageless touchdown bearings with high rigidity and load-bearing capacity ensure back-up support. However, the contact collision of rolling elements in a cageless bearing will lead to deterioration of bearing performance and instability of the rotor system. For this purpose, a method based on noncontact between adjacent rolling elements in cageless bearings is proposed in this paper. First, combined with space geometry, the contact process and the change in radius of rotation when a rolling element passes through a discrete groove are analysed, and a clearance between the adjacent rolling elements is generated by changing the rotation speed. Based on this, a design principle for setting a discrete groove on an outer ring raceway is proposed, and the equation for the circumferential discrete clearance for the rolling element based on bearing kinematics is given. Combined with the characteristics of discrete groove structures, a differential equation for the discrete dynamics of rolling elements with variable stiffness coefficients is proposed. We then determine the influence of the discrete groove structure on the discrete motion of the rolling element and bearing dynamic characteristics. Third, the dynamics simulation is combined with a vibration characteristics experiment and discrete motion experiment for a rolling element in a cageless bearing. Our research results show that a discrete groove design for the raceway can be used to realize stable discrete motion of the rolling element, and that such a discrete groove structure will not adversely affect the vibration characteristics of the bearing. The feasibility of the discrete design of cageless bearings with rolling element is verified, and theoretical guidance for the development and application of cageless bearings is provided.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
