Abrégé

The invention relates to a centrifugal pump (1), in particular a water pump, which is designed as a radial pump or a mixed flow pump, comprising an impeller (3) which is arranged in a housing (2) in a rotatable manner about an axis (8), is connected to a driveshaft (7), and has an impeller main part (4) that has impeller blades (6) and an impeller covering body (5). The impeller main part (4) and the impeller covering body (5) can be moved axially relative to each other via an adjusting device (22). In order to achieve an active and reliable regulation of the centrifugal pump (1) over the entire rotational speed and temperature range with very low drive power, the impeller main part (4) is arranged on the driveshaft (7) or the impeller covering body (5) in an axially movable manner, and the adjusting device (22) is operatively connected to the impeller main part (4).

Classes IPC  ?

• F04D 15/00 - Commande, p. ex. régulation de pompes, d'installations ou de systèmes de pompage
• F04D 29/042 - Rotors pouvant se déplacer dans le sens axial

Abrégé

The invention pertains to an impeller (5) for a pump, in particular for a cooling water pump of an internal combustion engine, comprising an impeller body (5a) with a hub (11), a suction-side cover disc (14) with a central opening (15) for the suction of a feed medium and with at least one vane (13) connected to the suction-side cover disc (14) in one-piece construction and having an inner section (13a) near the central opening (15) and an outer section (13b) near the suction-side cover disc (14), wherein the vane (13) is curved in three dimensions in the inner section (13a) and is designed essentially in two dimensions in the outer section (13b). In order to achieve both ease of manufacturability and high efficiency, the impeller (5) comprises a pressure-side cover disc (24) designed as a separate part, said disc being solidly connected to the impeller body (5a) and rotating therewith, and the pressure-side cover disc (24) comprises at least one notch-like recess (26) for the vane (13) on the side (24a) facing the vane (13), said recess shaped according to the rear surface (22) and the profile of the vane (13), for a form-fitted connection thereto.

Classes IPC  ?

• F04D 29/22 - Rotors spécialement pour les pompes centrifuges