摘要
为改善与提高液氨类介质齿轮泵的进口空化性能和有效容积率,从进口流道的方向与位置设计及齿轮副基本参数优化等方面,提出一款来流方向垂直于泵内搬运方向即具有垂直型流向的齿轮泵.基于现有的优化模型,通过单位排量体积优化目标的公式修正,新增有效容积率约束,新建根切重合度约束,优化出齿轮副的模数、齿数、变位系数、齿顶高系数等基本参数,并据此进行相关分析.结果表明:现行通过主动轮齿顶啮合计算出的重合度不可靠,只有通过从动轮齿根点能否进入啮合计算出的重合度,才能保证齿轮副的连续传动;垂直型流向有利于进口空化性能的提高和困油性能的改善,外形上具有轴向尺寸小、径向尺寸大的几何特征等.方法为适用于任何介质的齿轮泵设计提供了一种新的思路.
To improve the effective volume rate and input cavitations performance of external gear pump of liquid ammonia medium,and from the perspectives of innovative design of input flow direction and flow channel location as well as the basic parameters optimization design of gear pairs,an gear pump with vertical-shaped flow direction,which meant the input flow direction was perpendicular to the moving direction was put forward. Based on the existing optimization model,and the correction of optimization formula of unit displacement volume,the new constraint functions of effective volume rate were added,the new constraint function of coincidence degree factor appropriated for gear undercut was established,and the basic parameters such as modulus and tooth number and displacement coefficient and addendum coefficient of gear pairs were optimized. Then,the correlation analysis was carried out. All results showed that the current coincidence degree calculated from addendum peak contact status of driving gear was not reliable; the continuous gear transmission was guaranteed only by the coincidence degree calculated according to whether the undercut point of driving gear could come into mesh; the input cavitations performance and trapped-oil performance improved because of the vertical-shaped flow direction; and the appearance features of a smaller axial size with a larger radial size was endowed in the vertical-shaped gear pump. Finally,a new design method was provided for gear pump applicable to any medium.
出处
《成都大学学报（自然科学版）》
2017年第3期285-288,共4页
Journal of Chengdu University（Natural Science Edition）
基金
四川省教育厅自然科学基金(16ZA0382)资助项目
关键词
齿轮泵
液氨
进口空化
重合度
进口流向
有限容积率
优化设计
gear pump
liquid ammonia
input cavitations
coincidence degree factor
input flow direction
effective volume rate
optimization design
