| 摘要: |
| 计算齿轮泵圆形卸荷槽下的卸荷面积和对应的困油压力。以困油的膨胀过程为例，首先通过啮合点位置和圆形槽圆形轮廓与从动轮齿廓和主动轮槽廓的交点位置计算，给出卸荷面积的精确计算方法，其结果由虚拟的测量数据验证；其次由流体体积弹性模量定义所构建的困油模型，对圆形、矩形两卸荷槽下的困油压力分别进行仿真运算，结果则被相关文献提供的试验结果所验证。结果表明：卸荷面积的计算结果与虚拟测量结果非常吻合；困油压力峰值的仿真结果与现有试验结果也非常吻合。当泵采用小侧隙大卸荷槽间距时，应多采用矩形槽，以提供更大的卸荷面积；当泵采用大侧隙小卸荷槽间距时，应当多采用圆形槽，以降低加工维修成本。 |
| 关键词: 齿轮泵 圆形卸荷槽 卸荷面积 困油压力 困油模型 |
| DOI：10.11841/j.issn.1007-4333.2014.04.23 |
| 投稿时间：2013-11-11 |
| 基金项目:成都大学人才引进资助项目（20804） |
|
| Trapped-oil pressure analysis of gear pump with arc unloading groove |
|
LI Yu-long
|
| (Industrial Manufacturing College, Chengdu University, Chengdu 610106, China) |
| Abstract: |
| The object of this research is to calculate the unloading area and evaluate the trapped-oil pressure of gear pump with arc unloading groove.With the expansion process of trapped-oil as an example,the accurate calculation method of unloading area was derived from the computation of gearing point of driving space curve and driven tooth curve,the calculation results were verified by the virtual measurement.The trapped-oil pressures of arc and rectangle unloading groove were simulated by the model derived from the definition of fluid bulk modulus.The simulation results were verified by the experimental data provided by literature cited.Results showed that the calculation result of unloading area greatly corresponded with virtual measurement data,and the simulation result of trapped-oil pressure peak also accorded with experimental data.Basing on the study,the important conclusions are drawn that rectangular unloading groove is preferred to provide larger unloading area when the pump with small backlash gap and large unloading groove space.On the contrast,the arc unloading groove is preferred to reduce processing cost and maintenance cost in the case that pump is with large backlash gap and small unloading groove space. |
| Key words: gear pump arc unloading groove unloading area trapped-oil pressure trapped-oil model |
