Fluid pump

Abstract

The invention relates to an electric fluid pump with a semi-axial construction, wherein the pump housing (32, 33, 34) has at least two identical pump housing parts (33, 34). This feature of the invention reduces the number of different components required to manufacture the electric fluid pump and thus reduces costs while achieving a high operating efficiency.

Description

[0001]This is a National Phase Application in the United States of International Patent Application No. PCT / EP2006 / 009762 filed Oct. 10, 2006, which claims priority on German Patent Application No. 10 2005 054 060.0, filed Nov. 10, 2005. The entire disclosures of the above patent applications are hereby incorporated by reference.FIELD OF THE INVENTION[0002]The invention is directed to a fluid pump for internal combustion engines, comprising an electric motor with a rotor arranged in a motor housing and a stator, the rotor being arranged on a drive shaft at least in a manner secured against rotation, an impeller fastened on the drive shaft, at least one set of guide vanes arranged behind the impeller in the flow direction of the fluid to be conveyed, and a pump housing enclosing the motor housing, the impeller and the guide vanes and at which a pressure port and an intake port are arranged opposite the axial ends.BACKGROUND OF THE INVENTION[0003]Fluid pumps for internal combustion en...

AI Technical Summary

Benefits of technology

[0011]This object is achieved with the characterizing part of the main claim. Thereby, the number of different components and thus the costs are reduced, while a high efficiency is to be realized. Moreover, the connection with a suction-side and a pressure-side pump housing part is simple to make, and little loss occurs. Thus, intake and pressure ports can be integrated in these parts. Further, these are the largest and therefore most expensive parts in the production. Notably, tooling costs are saved. Assembly errors caused by confusing the mounting direction are excluded. The shape of the individual ports facilitates the connection to the axially adjacent housing parts and provides for a steady low-loss transition when the flow is deflected. Mounting into a cooling system is readily realized because of the axial position of the suction port with respect to the pressure port in the cooling system. The package size, given a certain motor size to be used, is minimized. Further, no long inflow channel exists and a good efficiency is achieved due to the semi-axial blading. No additional space for the impeller is required. Thus, only a small mounting space is required. High production accuracies are not required.

[0012]In a particular embodiment, the set of guide vanes is arranged in a cylindrical pump housing part arranged axially between the two identical pump housing parts. This simplifies the shape and thus the production of the identical pump housing parts, since no direct abutment of the inner surfaces at the necessary guide vanes is required. Thus, the production accuracy can be reduced.

[0013]Accordingly, a fluid pump is provided which has a small number of different components, is adapted to be mounted in a simple manner and with little probability of error, and, due to the identical construction of the pump housing parts, reduces tooling and production costs especially with small quantities.

Problems solved by technology

Further, these are the largest and therefore most expensive parts in the production.

Thus, only a small mounting space is required.

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