Internal gear pump is the small gear wheel, the big gear for driven wheel, in work big gear with small gear cocurrent rotation.
内啮合齿轮泵中的小齿轮是主动轮，大齿轮为从动轮，在工作时大齿轮随小齿轮同向旋转。
Maintenance methods: replace the rolex clutch wheel and small steel wheel or the wear gear after annealing treatment, repair the wear gear quenching of gears to the annealing treatment again.
维修方法：更换表离合轮和小钢轮或者把磨损齿轮经过退火处理，修复磨损齿轮再把退火的齿轮进行淬火处理。
Maintenance methods: replace the precision of the clutch wheel and the small steel wheel or wear the gear after annealing treatment, repair the wear gear and then annealing the gear quenching.
维修方法：更换精准表离合轮和小钢轮或者把磨损齿轮经过退火处理，修复磨损齿轮再把退火的齿轮进行淬火处理。
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