Anti-Wear Design of the Knot-Tripping Mechanism and Knot-Tying Test for the Knotter
Aiming to solve the problem of knot-tripping failure caused by severe wear between the spherical roller and planar cam of the knotter, this paper first establishes a calculation model of the spatial cam contour surface. The knot-tripping mechanism in the knotter is designed as a line-contact curved-...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Lubricants |
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| Online Access: | https://www.mdpi.com/2075-4442/11/11/475 |
| _version_ | 1797458650728497152 |
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| author | Shiyu Lv Yaming Chen Jianjun Yin Maile Zhou Zefu Chen |
| author_facet | Shiyu Lv Yaming Chen Jianjun Yin Maile Zhou Zefu Chen |
| author_sort | Shiyu Lv |
| collection | DOAJ |
| description | Aiming to solve the problem of knot-tripping failure caused by severe wear between the spherical roller and planar cam of the knotter, this paper first establishes a calculation model of the spatial cam contour surface. The knot-tripping mechanism in the knotter is designed as a line-contact curved-surface cam mechanism, with the cutter arm swinging in accordance with sinusoidal acceleration. The design significantly reduces the contact stress between the cam and the roller, compared to the original knot-tripping mechanism. Additionally, it eliminates the impact between the spherical roller and the planar cam. Based on the Archard model, the calculation model for cam-roller wear in the knot-tripping mechanism has been derived and utilized for wear calculation. The wear test results of the knot-tripping mechanism with an aluminum cam show that the curved cam has a wear amount that is 43%, 56%, 46%, and 37% lower than that of the planar cam after tying the knot 200 times, 600 times, 1300 times, and 2000 times, respectively. Under the condition that the twine tension is set to 120 N, and the rotation speed of the fluted disc is 60 rpm, the deviations between the calculated value and the measured value of the wear amount of the curved cam are 9.48%, 6.01%, 7.27%, and 9.95%, respectively. This validates the accuracy of the spatial cam wear model and the correctness of the curved cam design. |
| first_indexed | 2024-03-09T16:40:11Z |
| format | Article |
| id | doaj.art-8bced2b4087e4c46b6d11b0307d1a5a8 |
| institution | Directory Open Access Journal |
| issn | 2075-4442 |
| language | English |
| last_indexed | 2024-03-09T16:40:11Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Lubricants |
| spelling | doaj.art-8bced2b4087e4c46b6d11b0307d1a5a82023-11-24T14:52:47ZengMDPI AGLubricants2075-44422023-11-01111147510.3390/lubricants11110475Anti-Wear Design of the Knot-Tripping Mechanism and Knot-Tying Test for the KnotterShiyu Lv0Yaming Chen1Jianjun Yin2Maile Zhou3Zefu Chen4School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, ChinaSchool of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, ChinaSchool of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, ChinaSchool of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, ChinaSchool of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, ChinaAiming to solve the problem of knot-tripping failure caused by severe wear between the spherical roller and planar cam of the knotter, this paper first establishes a calculation model of the spatial cam contour surface. The knot-tripping mechanism in the knotter is designed as a line-contact curved-surface cam mechanism, with the cutter arm swinging in accordance with sinusoidal acceleration. The design significantly reduces the contact stress between the cam and the roller, compared to the original knot-tripping mechanism. Additionally, it eliminates the impact between the spherical roller and the planar cam. Based on the Archard model, the calculation model for cam-roller wear in the knot-tripping mechanism has been derived and utilized for wear calculation. The wear test results of the knot-tripping mechanism with an aluminum cam show that the curved cam has a wear amount that is 43%, 56%, 46%, and 37% lower than that of the planar cam after tying the knot 200 times, 600 times, 1300 times, and 2000 times, respectively. Under the condition that the twine tension is set to 120 N, and the rotation speed of the fluted disc is 60 rpm, the deviations between the calculated value and the measured value of the wear amount of the curved cam are 9.48%, 6.01%, 7.27%, and 9.95%, respectively. This validates the accuracy of the spatial cam wear model and the correctness of the curved cam design.https://www.mdpi.com/2075-4442/11/11/475spatial cam mechanismknotteranti-wear designcurved cam |
| spellingShingle | Shiyu Lv Yaming Chen Jianjun Yin Maile Zhou Zefu Chen Anti-Wear Design of the Knot-Tripping Mechanism and Knot-Tying Test for the Knotter Lubricants spatial cam mechanism knotter anti-wear design curved cam |
| title | Anti-Wear Design of the Knot-Tripping Mechanism and Knot-Tying Test for the Knotter |
| title_full | Anti-Wear Design of the Knot-Tripping Mechanism and Knot-Tying Test for the Knotter |
| title_fullStr | Anti-Wear Design of the Knot-Tripping Mechanism and Knot-Tying Test for the Knotter |
| title_full_unstemmed | Anti-Wear Design of the Knot-Tripping Mechanism and Knot-Tying Test for the Knotter |
| title_short | Anti-Wear Design of the Knot-Tripping Mechanism and Knot-Tying Test for the Knotter |
| title_sort | anti wear design of the knot tripping mechanism and knot tying test for the knotter |
| topic | spatial cam mechanism knotter anti-wear design curved cam |
| url | https://www.mdpi.com/2075-4442/11/11/475 |
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