| 摘要 |
The invention describes a positive-displacement pump (10) of the type comprising a driving gear (12) and a driven gear (14) perfectly coupled together and each mounted on a respective support shaft (16, 18). The driving gear (12) is operatively connected to a motor (20) to set the driven gear (14) in rotation and generate the pumping action on a fluid. The gears (12, 14) are contained in a chamber (40) provided with a closing plate (42). The support shafts (16, 18), the central body (38) of the pump (10), the chamber (40) that contains the gears (12, 14), the closing plate (42) of such a chamber (40), a inner magnet (36) and the base of the rear body (28) of the pump (10) are in turn housed inside a casing (30) of the pump (10). The chamber (40) and the relative closing plate (42) are mounted in a mobile manner with respect to one another and both with respect to the other components of the pump (10) as a function of the pressure of the fluid contained in such a pump (10). A self-compensating chamber (40) is thus made that is adaptable to the varying of the clearances due to the wearing of the internal components of the pump (10) that are in movement, or that are in contact with other moving components. |
