A hydraulic gear pump consists of a pair of intermeshing gears that rotate to create changes in the oil volume and generate pressure. As the gears rotate, the meshing and separation of the teeth cause the oil to be trapped between them. When the teeth come together, the oil is confined and cannot escape, leading to a phenomenon known as "trapped oil." This trapped oil creates high pressure, which can exert lateral force on the shaft, potentially causing it to bend. Over time, this may lead to premature wear on the bearings and increased power consumption by the motor. To address this issue, a discharge groove is typically cut into the side of the gear where the meshing occurs. This allows the trapped oil to escape smoothly, reducing pressure and preventing damage to the pump components. By implementing this design feature, the efficiency and longevity of the hydraulic gear pump are significantly improved. It’s an essential consideration in the design and maintenance of such systems to ensure smooth operation and reduce mechanical stress.
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