| 摘要 |
These pumps (1) comprise a housing (2) having a inlet mouth (6) and an outlet mouth (7) for a fluid, while inside is housed a turbine (3) coupled to a rear support and to another front support, separating the latter a suction chamber (13) and a discharge chamber (8). The improvements are characterized in that they comprise an axial fluid-tight sealing ring that provides a perimeter sealing between said chambers (8-13), which ring is located in an angular hole (16) established in correspondence with the front support (10). The sealing ring is coupled with a certain tightening in the terminal portion (15) of the turbine (3), rotation of which drags the ring performing the axial closure by contacting the same against a flat front section (18) of an angular recess (14) in the housing (2) of the pump (1). |
