外啮合异齿数斜齿轮泵流量脉动和流量特性的研究

利用能量守恒定律和齿轮的工作特性,得到了不同齿轮斜齿轮泵的瞬时流量和流量非均匀系数的计算公式;通过计算和分析不同齿数和不同螺旋角的齿轮泵(螺旋角为0°即为直齿轮泵)的瞬时排量和流量脉动特性可以看出:假如主动轮具有相同的齿数、模数、压力角,则直齿轮泵的流量不均匀系数比较小;对于具有不同齿数的斜齿轮泵,流量非均匀系数随着螺旋角的增加而增加,并随齿轮齿数的增加而减小;并且当主动轮齿数不变的时候,流量不均匀系数随着从动轮齿数的减小和螺旋角增加而急剧增加,但是与齿轮的模数无关。

Study on Flow Pulsation and Flow Characteristics of External Helical Gear Pump with Different Number of Teeth

Based on the conservation of energy and the working characteristics of gears, the calculation formulas for the instantaneous flow and non-uniform flow coefficient in helical gear pumps with different gears are obtained. By calculating and analyzing the instantaneous flow and flow fluctuation characteristics of gear pumps with different tooth numbers and helix angles (spur gear pump with helix angle 0°), it can be seen that: If the driving gear has the same number of teeth, modulus, pressure angle, the non-uniformity flow coefficient of spur gear pump is relatively small; for helical gear pump with different number of teeth, the non-uniformity flow coefficient increases with the increase of helix angle and decreases with the increase of the number of gear teeth. And when the number of driving gear teeth remains unchanged, the flow non-uniformity coefficient increases sharply with the reduction of the number of driven gear teeth and the increase of helix angle, but it is independent of the gear modulus.