Comparing with involute gear pump, the instant displacement is in direct proportion to the angular velocity of the gear and stable without pulsation.
对比渐开线齿轮泵，单圆弧齿轮泵的瞬时排量与齿轮角速度成正比，且稳定，无脉动。
Internal gear pump has two kinds of tooth profile namely: involute profile and cycloidal tooth profile.
内啮合齿轮泵有两种齿形即：渐开线齿形和摆线齿形。
The tooth profile of gear pump is involute in general. Though the involute profile is easy to design and manufacture, it also brings the inherent problem of oil trapping.
齿轮泵转子的齿廓型线一般为渐开线，渐开线型线虽设计加工方便，但存在原理性的困油现象；
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