| 摘要 |
PURPOSE: A high-pressure trochoid pump is provided to prevent a shaft sealing device and a bearing from damage in long-time use of a pump by removing pushing of a drive shaft caused by a working fluid when pressure rises up. CONSTITUTION: A hollow portion(100) is formed up to an intake port(1) of a pump casing(10) from a drive shaft(20) to prevent pushing of the drive shaft due to a working fluid discharged in rotation of a first and a second step gear unit(31,32). An internal and an external gear in the first and the second step gear unit are rotated with eccentricity from the center of the drive shaft. The working fluid is sucked through the intake port and flowed into a larger space between the internal and the external gear. The working fluid is discharged at high pressure through a smaller space again. The working fluid is discharged through a discharge port(2) without leaking by a shaft sealing device(50). A part of the working fluid is returned to the intake port. Therefore, the drive shaft is prevented from pushing by the high-pressure working fluid.
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