| 摘要 |
A three-throw gear pump (2) comprises a drive gear (20), two driven gears (21, 22) so disposed as to face each other on both sides of the drive gear (20), a first bearing (36) for supporting the drive shaft of the drive gear (20), and second and third bearings (37, 38) for supporting the rotation sha fts of the two driven gears (21, 22). The bearing length of the first bearin g (36) is shorter than the bearing length of each of the second and third be arings (37, 38). Thereby, the three-phase gear pump in which the bearing los ses in the bearings for supporting the gears are easily and surely reduced c an be provided.
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