Influence of Bubbles Causing Cavitation on Spool Oscillation of a Direct Drive Servovalve
A direct drive servovalve has some inherent benefits over its conventional counterparts, but also has better reliability and output power. However, due to the rigid connection between the spool and the motor, which takes the place of interstage drive-by fluid, the spool oscillation is a long-standin...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-06-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/12/6/717 |
| _version_ | 1827689389041385472 |
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| author | Pengda Ren Bin Wang Wei Zhang Zhigang Xie |
| author_facet | Pengda Ren Bin Wang Wei Zhang Zhigang Xie |
| author_sort | Pengda Ren |
| collection | DOAJ |
| description | A direct drive servovalve has some inherent benefits over its conventional counterparts, but also has better reliability and output power. However, due to the rigid connection between the spool and the motor, which takes the place of interstage drive-by fluid, the spool oscillation is a long-standing unsolved problem. In order to study the oscillation mechanism and the influencing factors, a double-circuit direct drive servovalve was numerically simulated. An oil return valve cavity was concentrated on as the main flow domain and was used to analyze the fluid flow characteristics. Local cavitation fraction and surface average cavitation fraction were defined to evaluate the cavitation situation. The periodic growth process of bubbles in the valve cavity was obtained. The numerical results show that bubbles in the oil return valve cavity changes, although the occurrence, evolution, and collapse stages were certain. The intensity of pressure pulsation caused by bubble variation is highly related to the bubbles causing the cavitation, which suggests a workable way to inhibit the spool oscillation. |
| first_indexed | 2024-03-10T10:17:01Z |
| format | Article |
| id | doaj.art-e21eb3b050004416a879826daf2be3f2 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T10:17:01Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-e21eb3b050004416a879826daf2be3f22023-11-22T00:46:16ZengMDPI AGMicromachines2072-666X2021-06-0112671710.3390/mi12060717Influence of Bubbles Causing Cavitation on Spool Oscillation of a Direct Drive ServovalvePengda Ren0Bin Wang1Wei Zhang2Zhigang Xie3College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaJiangsu Province Key Laboratory of Aerospace Power System, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaFlight Automatic Control Research Institute, Xi’an 710000, ChinaFlight Automatic Control Research Institute, Xi’an 710000, ChinaA direct drive servovalve has some inherent benefits over its conventional counterparts, but also has better reliability and output power. However, due to the rigid connection between the spool and the motor, which takes the place of interstage drive-by fluid, the spool oscillation is a long-standing unsolved problem. In order to study the oscillation mechanism and the influencing factors, a double-circuit direct drive servovalve was numerically simulated. An oil return valve cavity was concentrated on as the main flow domain and was used to analyze the fluid flow characteristics. Local cavitation fraction and surface average cavitation fraction were defined to evaluate the cavitation situation. The periodic growth process of bubbles in the valve cavity was obtained. The numerical results show that bubbles in the oil return valve cavity changes, although the occurrence, evolution, and collapse stages were certain. The intensity of pressure pulsation caused by bubble variation is highly related to the bubbles causing the cavitation, which suggests a workable way to inhibit the spool oscillation.https://www.mdpi.com/2072-666X/12/6/717direct drive servovalvespool oscillationcavitationsurface average cavitationshedding bubbles |
| spellingShingle | Pengda Ren Bin Wang Wei Zhang Zhigang Xie Influence of Bubbles Causing Cavitation on Spool Oscillation of a Direct Drive Servovalve Micromachines direct drive servovalve spool oscillation cavitation surface average cavitation shedding bubbles |
| title | Influence of Bubbles Causing Cavitation on Spool Oscillation of a Direct Drive Servovalve |
| title_full | Influence of Bubbles Causing Cavitation on Spool Oscillation of a Direct Drive Servovalve |
| title_fullStr | Influence of Bubbles Causing Cavitation on Spool Oscillation of a Direct Drive Servovalve |
| title_full_unstemmed | Influence of Bubbles Causing Cavitation on Spool Oscillation of a Direct Drive Servovalve |
| title_short | Influence of Bubbles Causing Cavitation on Spool Oscillation of a Direct Drive Servovalve |
| title_sort | influence of bubbles causing cavitation on spool oscillation of a direct drive servovalve |
| topic | direct drive servovalve spool oscillation cavitation surface average cavitation shedding bubbles |
| url | https://www.mdpi.com/2072-666X/12/6/717 |
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