| 摘要 |
Provided is an internal gear pump. The shape of any one of a plurality of external teeth and a plurality of internal teeth of the pump is formed on the basis of formulae (1)-(5). Formula (1): r=ro-dr∙cosθ. Formula (2): Px=(ro-dr)+1/4dr{1-cos(2θ)}. Formula (3): Py=1/4dr{-2θ+sin(2θ)}. Formula (4): Qx=Px-r∙cosθ. Formula (5): Qy=Py+r∙sinθ. |
