| 摘要 |
<p>An internal gear pump for pumping fluid comprising an inlet port (1), an outlet port (2), an externally toothed external gear (4), an internally toothed internal gear (5) connected to the external gear with a meshing region (12), and a crescent member (3), wherein said crescent member has a trailing edge (11) adjacent to the outlet port, and a tapered leading edge region (13) adjacent to the inlet port having a leading edge (10), an exterior leading edge profile (14a), and an interior leading edge profile (14b), wherein angle a formed between the leading edge and the diameter of the outer boundary passing through a first starting point (28) of the taper on said outer boundary is smaller than angle p formed between the leading edge and the diameter of the inner boundary passing through a second starting point (30) of the taper on said inner boundary. Fig. 2a</p> |
