Research on Contact and Wear Characteristics of the Planetary Roller Screw Mechanism with Screw Misalignments
Misalignments are unavoidable in most applications of the planetary roller screw mechanism (PRSM) due to many potential causes. However, the effect of screw misalignments on the contact characteristics for the PRSM have not been thoroughly investigated. In this paper, a comprehensive analytical proc...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-06-01
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| Series: | Lubricants |
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| Online Access: | https://www.mdpi.com/2075-4442/10/6/115 |
| _version_ | 1827659095087251456 |
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| author | Junjie Meng Xing Du Xin Zhao Junwei Zheng Dingwei Wang Long Wan |
| author_facet | Junjie Meng Xing Du Xin Zhao Junwei Zheng Dingwei Wang Long Wan |
| author_sort | Junjie Meng |
| collection | DOAJ |
| description | Misalignments are unavoidable in most applications of the planetary roller screw mechanism (PRSM) due to many potential causes. However, the effect of screw misalignments on the contact characteristics for the PRSM have not been thoroughly investigated. In this paper, a comprehensive analytical procedure for the PRSM performance considering screw misalignments is proposed. First, the contact positions and clearances of the PRSM with screw misalignments are calculated. Next, an improved model is presented for evaluation of the load distribution, in which the variation of axial clearances is taken into consideration. The numerical results are validated by finite element analysis. Then, the precision loss model caused by wear is derived considering the variation of contact forces. The results indicate that the contact positions slightly change due to the misalignment angle of the screw, while the axial clearances and load distribution at the screw-roller interface are significantly affected. At the same time, the contact forces over thread vary periodically. In addition, the screw misalignment aggravates the wear of the PRSM, resulting in accuracy degradation. The theoretical investigations lay the foundation for the engineering application of the PRSM. |
| first_indexed | 2024-03-09T23:14:48Z |
| format | Article |
| id | doaj.art-87eadaec5fb14ee6b8f71bec11b32d4a |
| institution | Directory Open Access Journal |
| issn | 2075-4442 |
| language | English |
| last_indexed | 2024-03-09T23:14:48Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Lubricants |
| spelling | doaj.art-87eadaec5fb14ee6b8f71bec11b32d4a2023-11-23T17:38:20ZengMDPI AGLubricants2075-44422022-06-0110611510.3390/lubricants10060115Research on Contact and Wear Characteristics of the Planetary Roller Screw Mechanism with Screw MisalignmentsJunjie Meng0Xing Du1Xin Zhao2Junwei Zheng3Dingwei Wang4Long Wan5China Helicopter Research & Development Institute, Jingdezhen 333001, ChinaSchool of Advanced Manufacturing, Nanchang University, Nanchang 330031, ChinaChina Helicopter Research & Development Institute, Jingdezhen 333001, ChinaChina Helicopter Research & Development Institute, Jingdezhen 333001, ChinaChina Helicopter Research & Development Institute, Jingdezhen 333001, ChinaChina Helicopter Research & Development Institute, Jingdezhen 333001, ChinaMisalignments are unavoidable in most applications of the planetary roller screw mechanism (PRSM) due to many potential causes. However, the effect of screw misalignments on the contact characteristics for the PRSM have not been thoroughly investigated. In this paper, a comprehensive analytical procedure for the PRSM performance considering screw misalignments is proposed. First, the contact positions and clearances of the PRSM with screw misalignments are calculated. Next, an improved model is presented for evaluation of the load distribution, in which the variation of axial clearances is taken into consideration. The numerical results are validated by finite element analysis. Then, the precision loss model caused by wear is derived considering the variation of contact forces. The results indicate that the contact positions slightly change due to the misalignment angle of the screw, while the axial clearances and load distribution at the screw-roller interface are significantly affected. At the same time, the contact forces over thread vary periodically. In addition, the screw misalignment aggravates the wear of the PRSM, resulting in accuracy degradation. The theoretical investigations lay the foundation for the engineering application of the PRSM.https://www.mdpi.com/2075-4442/10/6/115planetary roller screw mechanismmisalignmentcontact positionaxial clearanceload distributionwear prediction |
| spellingShingle | Junjie Meng Xing Du Xin Zhao Junwei Zheng Dingwei Wang Long Wan Research on Contact and Wear Characteristics of the Planetary Roller Screw Mechanism with Screw Misalignments Lubricants planetary roller screw mechanism misalignment contact position axial clearance load distribution wear prediction |
| title | Research on Contact and Wear Characteristics of the Planetary Roller Screw Mechanism with Screw Misalignments |
| title_full | Research on Contact and Wear Characteristics of the Planetary Roller Screw Mechanism with Screw Misalignments |
| title_fullStr | Research on Contact and Wear Characteristics of the Planetary Roller Screw Mechanism with Screw Misalignments |
| title_full_unstemmed | Research on Contact and Wear Characteristics of the Planetary Roller Screw Mechanism with Screw Misalignments |
| title_short | Research on Contact and Wear Characteristics of the Planetary Roller Screw Mechanism with Screw Misalignments |
| title_sort | research on contact and wear characteristics of the planetary roller screw mechanism with screw misalignments |
| topic | planetary roller screw mechanism misalignment contact position axial clearance load distribution wear prediction |
| url | https://www.mdpi.com/2075-4442/10/6/115 |
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