Study on the leakage mechanism of the valve plate pair of internal curve hydraulic motor
The leakage of the valve plate pair of the internal curve hydraulic motor significantly affects its volumetric efficiency and machine performance; however, its leakage mechanism is unclear. This paper considers the self-compensating ‘floating’ type of valve plate as the study object, proposes a calc...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2025-06-01
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| Series: | Advances in Mechanical Engineering |
| Online Access: | https://doi.org/10.1177/16878132251346850 |
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| Summary: | The leakage of the valve plate pair of the internal curve hydraulic motor significantly affects its volumetric efficiency and machine performance; however, its leakage mechanism is unclear. This paper considers the self-compensating ‘floating’ type of valve plate as the study object, proposes a calculation method for the leakage of the valve plate pair of the internal curve hydraulic motor, and studies the leakage law and oil film characteristics of the valve plate pair. The results show that the rotational speed has less influence on the leakage amount and oil film thickness of the valve plate pair; the inlet pressure has a linear relationship with the leakage amount and oil film thickness; with the increase of the oil temperature the leakage amount of the valve plate pair decreases gradually, and oil film thickness is parabolic shape changes, but the oil film thickness tends to change smoothly in the range of oil temperature 40°C–55°C; the geometric shape of the oil film of the valve plate pair and the distribution of the pressure are cyclic within the periodic angle of the motor, and the pressure of the oil film is radial distribution in the inlet area, and the sealing band pressure is nonlinearly decreasing in the radial direction, the oil film leakage velocity in the motor periodic angle is ‘M’ shaped distribution. |
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| ISSN: | 1687-8140 |