| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal gear pump reducing leak of working fluid to a delivery port of low pressure from a delivery port of high pressure, inhibiting reduction of quantity of working fluid delivered from the delivery port of high pressure, and improving volumetric efficiency of a pump. SOLUTION: This internal gear pump has a bulkhead 18A between two delivery ports 14A, 15A. A minimum gap X dividing a pump chamber V1 communicating to the delivery port 14A of high pressure and a pump chamber V2 communicating with the delivery port 15A of low pressure is formed between external teeth 7A of an external gear 7 and internal teeth 6A of an internal gear 6 positioned above the bulkhead 18A. The minimum gap X is set in a range not less than 0.020 mm and not greater than 0.110 mm. COPYRIGHT: (C)2010,JPO&INPIT |
