Capped piston: A promising design to reduce compressibility effects, pressure ripple and cavitation for high-speed and high-pressure axial piston pumps
Raising rotational speed and operating pressure is an effective way to increase the power density of axial piston pumps. However, the axial piston pump with standard hollow pistons suffers from problems of volumetric losses, pressure ripple, and cavitation at high rotational speed and operating pres...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-01-01
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| Series: | Alexandria Engineering Journal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016822005026 |
| _version_ | 1797943094975397888 |
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| author | Qun Chao Zi Xu Jianfeng Tao Chengliang Liu |
| author_facet | Qun Chao Zi Xu Jianfeng Tao Chengliang Liu |
| author_sort | Qun Chao |
| collection | DOAJ |
| description | Raising rotational speed and operating pressure is an effective way to increase the power density of axial piston pumps. However, the axial piston pump with standard hollow pistons suffers from problems of volumetric losses, pressure ripple, and cavitation at high rotational speed and operating pressure. To reduce these fluid-related problems, the capped piston design is a promising alternative to the standard piston design by minimizing the dead volume. The capped pistons have been applied in commercial axial piston pumps but it remains unclear how the flow characteristics of axial piston pumps benefit from them. Therefore, this paper aims to clarify the mechanism of capped pistons in improving the flow characteristics of axial piston pumps. A computational fluid dynamics model is developed to compare the pump’s flow characteristics between standard and capped pistons. The simulation results show that compared with the standard hollow pistons, the capped pistons can significantly reduce the compressibility effects, pressure ripple, and cavitation over a wide range of operating conditions. |
| first_indexed | 2024-04-10T20:18:58Z |
| format | Article |
| id | doaj.art-771eb73e3ffe4fe2aeea6ab37970756c |
| institution | Directory Open Access Journal |
| issn | 1110-0168 |
| language | English |
| last_indexed | 2024-04-10T20:18:58Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj.art-771eb73e3ffe4fe2aeea6ab37970756c2023-01-26T04:44:16ZengElsevierAlexandria Engineering Journal1110-01682023-01-0162509521Capped piston: A promising design to reduce compressibility effects, pressure ripple and cavitation for high-speed and high-pressure axial piston pumpsQun Chao0Zi Xu1Jianfeng Tao2Chengliang Liu3Corresponding author.; State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, ChinaState Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, ChinaState Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, ChinaState Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, ChinaRaising rotational speed and operating pressure is an effective way to increase the power density of axial piston pumps. However, the axial piston pump with standard hollow pistons suffers from problems of volumetric losses, pressure ripple, and cavitation at high rotational speed and operating pressure. To reduce these fluid-related problems, the capped piston design is a promising alternative to the standard piston design by minimizing the dead volume. The capped pistons have been applied in commercial axial piston pumps but it remains unclear how the flow characteristics of axial piston pumps benefit from them. Therefore, this paper aims to clarify the mechanism of capped pistons in improving the flow characteristics of axial piston pumps. A computational fluid dynamics model is developed to compare the pump’s flow characteristics between standard and capped pistons. The simulation results show that compared with the standard hollow pistons, the capped pistons can significantly reduce the compressibility effects, pressure ripple, and cavitation over a wide range of operating conditions.http://www.sciencedirect.com/science/article/pii/S1110016822005026Axial piston pumpDead volumeCompressibility effectsPressure rippleCavitation |
| spellingShingle | Qun Chao Zi Xu Jianfeng Tao Chengliang Liu Capped piston: A promising design to reduce compressibility effects, pressure ripple and cavitation for high-speed and high-pressure axial piston pumps Alexandria Engineering Journal Axial piston pump Dead volume Compressibility effects Pressure ripple Cavitation |
| title | Capped piston: A promising design to reduce compressibility effects, pressure ripple and cavitation for high-speed and high-pressure axial piston pumps |
| title_full | Capped piston: A promising design to reduce compressibility effects, pressure ripple and cavitation for high-speed and high-pressure axial piston pumps |
| title_fullStr | Capped piston: A promising design to reduce compressibility effects, pressure ripple and cavitation for high-speed and high-pressure axial piston pumps |
| title_full_unstemmed | Capped piston: A promising design to reduce compressibility effects, pressure ripple and cavitation for high-speed and high-pressure axial piston pumps |
| title_short | Capped piston: A promising design to reduce compressibility effects, pressure ripple and cavitation for high-speed and high-pressure axial piston pumps |
| title_sort | capped piston a promising design to reduce compressibility effects pressure ripple and cavitation for high speed and high pressure axial piston pumps |
| topic | Axial piston pump Dead volume Compressibility effects Pressure ripple Cavitation |
| url | http://www.sciencedirect.com/science/article/pii/S1110016822005026 |
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