The Research of Geometry and Qualitative Indicators of a Gear Pump with Internal Involute Gearing
| Authors: Tarabarin V.B., Tarabarina Z.I. | Published: 21.02.2018 |
| Published in issue: #2(695)/2018 | |
| Category: Mechanical Engineering and Machine Science | Chapter: Theory of Mechanisms and Machines | |
| Keywords: gear pumps, internal involute gearing, calculation of geometry of engagement, boundary conditions, qualitative indicators, blocking contours |
The paper deals with the calculation of geometry of gear pumps with internal involute gearing and presents the calculation procedure. It also describes boundary conditions of the existence of gearing and specific qualitative indicators for working pairs of gear pumps: the ratio of geometric flow, the coefficient of uneven flow and the change ratio of the trapped volume. The blocking contours are calculated for two examples based on the limitations of the cutter tool and working gearing. The authors investigate the influence of the coefficients of displacement x1 and x2 and the parameters of the cutter tool gearing (number of teeth of the shaping cutter, radial and side clearances) on the shape, size and location of the contour of the coordinate plane. The contour lines of the qualitative indicators are plotted over the constructed contours. These lines allow the designer to select the optimal combination of the coefficients of displacement x1 and x2 that provide the best characteristics for the pumps.
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