Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Turbine regenerative pump
Patent
1997-12-31
2000-01-25
Look, Edward K.
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Turbine regenerative pump
415 552, 415 553, 415 554, 415 556, 415 557, 415119, F01D 112
Patent
active
060171839
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a flow pump particularly for the conveying of fuel from the fuel tank of a motor vehicle.
In a known dual-flow pump of this species (DE 40 20 521 A1), called peripheral pump there, of the walls delimiting the pump chamber, one lateral wall and the peripheral wall are embodied on an intermediate housing having the pump outlet, and the other side wall is embodied on a housing cover of a pump inlet having the output connector. The pump or impeller wheel disposed in the pump chamber is fitted on top of a housing cover which has an extruded journal and is connected, fixed against relative rotation, with the power-take off shaft of an electric motor that is housed in a mounting support embodied in a intermediate housing. During operation the flow pump aspirates the fuel through the aspirating connector and pushes the same through the pump outlet into the inner chamber of a pump housing enclosing an electric motor and the intermediate housing. From there the compressed fuel is fed into the internal combustion engine by means of a pressure line which can be connected to a pressure connector of the pump housing.
This known flow pump demonstrates a good noise behavior as a result of the geometric shape outlet area of the lateral channel in the two lateral walls.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a flow pump which is a further improvement of existing flow pumps.
In keeping with these objects and with others which will become apparent hereinafter, one feature of present invention resides, briefly stated, in a flow pump which is a further improvement of the existing flow pumps.
In keeping with these objects and with others which will become apparent hereinafter, one feature of present invention resides, briefly stated, in a flow pump which has a damping groove open in direction toward a pump chamber and formed so that the damping groove is separated from the lateral channel by an interrupting strip and has a contour corresponding to a contour of the lateral channel. When the flow pump is designed in accordance with the present invention, it has the advantage, that the flow-induced noises still caused by the flow pump are greatly reduced. By means of the damping groove of the invention which, in accordance with the invention is located in the area of the highest occurring amplitudes of the wall compression oscillations at the impeller wheel vane frequency, the alternating wall pressures are measurably reduced, which is accompanied by a significant noise reduction. In addition, the advantage presents itself, that bigger axial gaps between the impeller wheel and the lateral walls opposite the front ends of the impeller wheel can be permitted, leading to a higher permitted production tolerances and thus to a reduction of production costs.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be explained in more detail in the following description by means of an embodiment represented in the drawings. Shown are in:
FIG. 1, a lateral view of the flow pump for conveying fuel, partially in section,
FIG. 2, a section along the line II--II in FIG. 3 of an intermediate housing in the flow pump in FIG. 1,
FIG. 3, a plan view of the intermediate housing in the direction of the arrow III in FIG. 2,
FIG. 4, a section along the line IV--IV in FIG. 5 of a housing cover of the flow pump in FIG. 1,
FIG. 5, a plan view of the housing cover in the direction of the arrow V in FIG. 4,
FIG. 6, a section along the line VI--VI in FIG. 5,
FIG. 7, a lateral view of an impeller wheel of the flow pump in FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The flow pump shown in lateral view in FIG. 1, also known as side-channel pump, is used for conveying fuel out of a fuel tank, not shown here, of a motor vehicle to an internal combustion engine, also not shown here, of a motor vehicle. The flow pump has a pump chamber 11 embodied in a pump housing 10, which is delimited by two radially extending, axially spaced apart lateral walls 12,
REFERENCES:
patent: 5391062 (1995-02-01), Yoshioka
patent: 5429476 (1995-07-01), Krauter et al.
patent: 5449269 (1995-09-01), Frank et al.
patent: 5498124 (1996-03-01), Ito et al.
patent: 5558490 (1996-09-01), Dobler et al.
patent: 5716191 (1998-02-01), Ito et al.
Dobler Klaus
Huebel Michael
Rose Jochen
Strohl Willi
Look Edward K.
Robert & Bosch GmbH
Shanley Matthew T.
Striker Michael J.
LandOfFree
Flow pump does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flow pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flow pump will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2312044