| 摘要 |
The present invention relates to a micro gear pump whose structure is improved to maintain the pressure of a working fluid to be a reference pressure or less. According to the present invention, the micro gear pump comprises: a pump main body having a flow path wherein a working fluid flows; and a pair of impellers connected with a motor and rotated, and to allow the working fluid to flow along the flow path. Moreover, the micro gear pump comprises: a check valve installed in the pump main body to open or block the flow path by the hydraulic pressure of the working fluid formed by rotation of the impeller; and a relief valve to allow the working fluid to flow out to an outside in order to reduce the pressure inside the pump main body when the hydraulic pressure of the working fluid is equal to or more than a reference pressure in the pump main body. |
