US 8,803,396 B2Granted

Rotor assembly, in which at least one inter-claw space is sealed by the fan

AssigneeValeo Equipements Electriques Moteur

InventorClaudiu Vasilescu

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Abstract

The invention relates to a rotor assembly which is mounted such as to rotate around an axis of rotation (X-X′) and which comprises two magnet wheels with claws (10). The aforementioned magnet wheels are separated by an axial space and are disposed opposite one another. Moreover, each wheel (10) comprises an end shield (11) which is essentially perpendicular to the aforementioned axis (X-X′), and claws (12) extended axially from said end shield (11) towards the other wheel (10). The claws (12) of one wheel (10) are solidly connected to the end shield (11) by respective bases (121) which are separated from one another by peripheral spaces (13). The inventive assembly comprises at least one fan (30) which is positioned on an axial face of the end shield (11) of one of the wheels (10) opposite the other wheel (10), such that the fan (30) axially seals at least part of one of the peripheral spaces (13).

Claims8

Dependent claims

A rotor assembly mounted to rotate around an axis of rotation (X-X′) and comprising:

two magnet wheels (10) separated by an axial spacing and arranged opposite each other, each of the wheels (10) comprising an end shield (11) substantially perpendicular to the axis (X-X′) and claws (12) extending axially from the end shield (11) towards the other wheel (10);
the end shield (11) of one of the magnet wheels comprising an axial face (111) opposite the other wheel;
the claws (12) of one wheel (10) being attached to the end shield (11) by respective bases (121) mutually separated by peripheral spaces (13);
and
a fan (30) positioned on the axial face (111) of the end shield (11) of one of the wheels (10) opposite the other wheel (10) so as to axially seal at least partly one of the peripheral spaces (13);
the fan (30) comprising a plate (31) substantially perpendicular to the axis (X-X′) and attached to the end shield (11), and blades (32) protruding from the plate (31);
the plate (31) having a sealing part (311) axially sealing at least one of the peripheral spaces (13);
the plate (31) of the fan (30) comprising a substantially annular solid part (312) having a radially outer edge;
the sealing part (311) comprising an axial relief (314) in the form of a thin tab comprising a first face (315) axially inclined from the solid part (312) of the plate (31) at the side of the claws (12) and from the axis of rotation (X-X′) so that the first face (315) extending obliquely between the solid part (312) and the axis of rotation (X-X′);
the tab further comprising a second face (316) extending from a distal end of the first face (315) parallel to the axis (X-X′);
the axial relief (314) extending from the plate (31) between the claws (12);
the claws (12) having radially outer surfaces (123) defining a diameter of the rotor assembly;
the second face (316) of the tab (314) lying in the extension of the outer faces (123) of two claws (12) and partially sealing the space separating these two outer faces over a short axial length;
the solid part (312) is provided with recessed zones (318) hollowed radially inwardly from the radially outer edge of the solid part (312), each of the recessed zones (318) being delimited by a base and two lateral sides diverging from the base up to the radially outer edge of the solid part (312);
the sealing part (311) extending from the base of the recessed zone (318).

12 more elements

A rotor assembly mounted to rotate around an axis of rotation (X-X′) and comprising:

two magnet wheels (10) separated by an axial spacing and arranged opposite each other, each of the wheels (10) comprising an end shield (11) substantially perpendicular to the axis (X-X′) and claws (12) extending axially from the end shield (11) towards the other wheel (10);
the end shield (11) of one of the magnet wheels comprising an axial face (111) opposite the other wheel;
the claws (12) of one wheel (10) being attached to the end shield (11) by respective bases (121) mutually separated by peripheral spaces (13);
and
a fan (30) positioned on the axial face (111) of the end shield (11) of one of the wheels (10) opposite the other wheel (10) so as to axially seal at least partly one of the peripheral spaces (13);
the fan (30) comprising a plate (31) substantially perpendicular to the axis (X-X′) and attached to the end shield (11), and blades (32) protruding from the plate (31);
the plate (31) having a sealing part (311) axially sealing at least one of the peripheral spaces (13);
the plate (31) of the fan (30) comprising a substantially annular solid part (312) having a radially outer edge;
the sealing part (311) comprising an axial relief (314) in the form of a thin tab comprising a first face (315) axially inclined from the solid part (312) of the plate (31) at the side of the claws (12) and from the axis of rotation (X-X′) so that the first face (315) extending obliquely between the solid part (312) and the axis of rotation (X-X′);
the tab further comprising a second face (316) extending from a distal end of the first face (315) parallel to the axis (X-X′);
the axial relief (314) extending from the plate (31) between the claws (12);
the axial relief (314) being shaped so as to serve as a fixing clip for the fan (30) on the corresponding magnet wheel (10);
the solid part (312) is provided with recessed zones (318) hollowed radially inwardly from the radially outer edge of the solid part (312), each of the recessed zones (318) being delimited by a base and two lateral sides diverging from the base up to the radially outer edge of the solid part (312);
the sealing part (311) extending from the base of the recessed zone (318).

11 more elements

A rotor assembly mounted to rotate around an axis of rotation (X-X′) and comprising:

two magnet wheels (10) separated by an axial spacing and arranged opposite each other, each of the wheels (10) comprising an end shield (11) substantially perpendicular to the axis (X-X′) and claws (12) extending axially from the end shield (11) towards the other wheel (10);
the end shield (11) of one of the magnet wheels comprising an axial face (111) opposite the other wheel;
the claws (12) of one wheel (10) being attached to the end shield (11) by respective bases (121) mutually separated by peripheral spaces (13);
and
a fan (30) positioned on the axial face (111) of the end shield (11) of one of the wheels (10) opposite the other wheel (10) so as to axially seal at least partly one of the peripheral spaces (13);
the fan (30) comprising a plate (31) substantially perpendicular to the axis (X-X′) and attached to the end shield (11), and blades (32) protruding from the plate (31);
the plate (31) having a sealing part (311) axially sealing at least one of the peripheral spaces (13);
the plate (31) of the fan (30) comprising a substantially annular solid part (312) having a radially outer edge;
the sealing part (311) comprising an axial relief (314) in the form of a thin tab comprising a first face (315) axially inclined from the solid part (312) of the plate (31) at the side of the claws (12) and from the axis of rotation (X-X′) so that the first face (315) extending obliquely between the solid part (312) and the axis of rotation (X-X′);
the tab further comprising a second face (316) extending from a distal end of the first face (315) parallel to the axis (X-X′);
the axial relief (314) extending from the plate (31) between the claws (12);
the tab (314) carrying an axial reinforcing rib (317) extending from the plate (31) along the first and second faces (315, 316) of the tab (314), the reinforcing rib (317) being centrally located relative to the first and second faces (315, 316);
the solid part (312) is provided with recessed zones (318) hollowed radially inwardly from the radially outer edge of the solid part (312), each of the recessed zones (318) being delimited by a base and two lateral sides diverging from the base up to the radially outer edge of the solid part (312);
the sealing part (311) extending from the base of the recessed zone (318).

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/584,406Filed 24 Feb 2005
Priority: FR 04 0203027 Feb 2004
Published: US 2009/0085417 A12 Apr 2009
Granted: 12 Aug 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

F04D 29/667
Especially adapted for elastic fluid pumps: by influencing the flow pattern, e.g. suppression of turbulence
H02K 1/243
Rotor cores with salient poles ; Variable reluctance rotors: of the claw-pole type
H02K 9/06
Having means for generating a flow of cooling medium: with fans or impellers driven by the machine shaft
F04D
Non-positive-displacement pumps