Research on the Matching of Impact Performance and Collision Coefficient of Hydraulic Rock Drill
The stress wave produced by the piston impact, on the drill rod, is an important factor affecting impact performance. It is particularly important to control the stress waveform generated by the piston impact on the drill rod to meet the requirements of efficiency and component durability of some im...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/6651860 |
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| author | Yelin Li |
| author_facet | Yelin Li |
| author_sort | Yelin Li |
| collection | DOAJ |
| description | The stress wave produced by the piston impact, on the drill rod, is an important factor affecting impact performance. It is particularly important to control the stress waveform generated by the piston impact on the drill rod to meet the requirements of efficiency and component durability of some impact mechanical systems. Based on wave theory, the impact stress wave model of rock drilling is established, a dimensionless collision coefficient γ is put forward, and the matching relationship between different collision coefficients γ and stress waveforms is analysed. The length of the impact piston under the same material condition determines the change rule of the waveform. The stress waveform experimental verification is thus designed. The pressure chamber curves of different pistons in the rock drill were tested, the collision velocity of the piston was obtained, and the impact energy and impact power were calculated. The relationship between the impact performance and the collision coefficient γ is analysed. When γ is in the range of 9–11, the impact piston’s design of a high-power rock drill can be satisfied. When γ is in the range of 3∼5, it is mainly designed for low-power rock drills. |
| format | Article |
| id | doaj-art-3e2f24882fe744499455ac81021f3aa7 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-3e2f24882fe744499455ac81021f3aa72025-08-20T03:55:41ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/66518606651860Research on the Matching of Impact Performance and Collision Coefficient of Hydraulic Rock DrillYelin Li0Hunan Province Cooperative Innovation Centre for the Construction & Development of Dongting Lake Ecological Economic Zone, Hunan University of Arts and Science, Changde 415000, ChinaThe stress wave produced by the piston impact, on the drill rod, is an important factor affecting impact performance. It is particularly important to control the stress waveform generated by the piston impact on the drill rod to meet the requirements of efficiency and component durability of some impact mechanical systems. Based on wave theory, the impact stress wave model of rock drilling is established, a dimensionless collision coefficient γ is put forward, and the matching relationship between different collision coefficients γ and stress waveforms is analysed. The length of the impact piston under the same material condition determines the change rule of the waveform. The stress waveform experimental verification is thus designed. The pressure chamber curves of different pistons in the rock drill were tested, the collision velocity of the piston was obtained, and the impact energy and impact power were calculated. The relationship between the impact performance and the collision coefficient γ is analysed. When γ is in the range of 9–11, the impact piston’s design of a high-power rock drill can be satisfied. When γ is in the range of 3∼5, it is mainly designed for low-power rock drills.http://dx.doi.org/10.1155/2021/6651860 |
| spellingShingle | Yelin Li Research on the Matching of Impact Performance and Collision Coefficient of Hydraulic Rock Drill Shock and Vibration |
| title | Research on the Matching of Impact Performance and Collision Coefficient of Hydraulic Rock Drill |
| title_full | Research on the Matching of Impact Performance and Collision Coefficient of Hydraulic Rock Drill |
| title_fullStr | Research on the Matching of Impact Performance and Collision Coefficient of Hydraulic Rock Drill |
| title_full_unstemmed | Research on the Matching of Impact Performance and Collision Coefficient of Hydraulic Rock Drill |
| title_short | Research on the Matching of Impact Performance and Collision Coefficient of Hydraulic Rock Drill |
| title_sort | research on the matching of impact performance and collision coefficient of hydraulic rock drill |
| url | http://dx.doi.org/10.1155/2021/6651860 |
| work_keys_str_mv | AT yelinli researchonthematchingofimpactperformanceandcollisioncoefficientofhydraulicrockdrill |