| 摘要 |
An external fluid gear pump comprising a pair of gears with a contiguous backlash thereof small clearance seal off the trap regions; plural relief conduits provided at the decreasing trap region on at least a bearing block or end plate relieving the fluid in said decreasing trap region to the suction chamber; plural pressure adjusting devices provided at an end portion of the each conduit toward the suction chamber; and plural suction conduits provided at the increasing trap region on at least a bearing block or end plate sucking fluid from suction chamber to a increasing trap region; flow check devices provided at an end portion of the each conduit toward the suction chamber, whereby the tooth contact noise of the gear is eliminated which is caused by losing tooth contact during engagements of the gears, and the air bubbles in increasing trap region are suppressed, and hold undesirable fluid leakage from discharge chamber to suction chamber, achieving low noise, low vibration, high efficiency gear pump. |
