Research Article
Calculation of Unloading Area of Internal Gear Pump and Optimization
Table 1
Internal gear pump parameters.
| Name of the parameter | Parameter | Value |
| Number of teeth | | 13/19 | Modulus (mm) | m | 3 | Center distance (mm) | e | 9.278 | Pressure angle (°) | α | 20 | Coefficient of rack cutter tip height | | 1.25 | External gear profile shift coefficient | | 0.432 | Internal gear profile shift coefficient | | 0.55 | Unloading groove boundary distance (mm) | | 2.035 | The first solution root radius (mm) | | 32.0 | The second solution root radius (mm) | | 33.80 |
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