EP3314127A1 - Compresseur electrique avec roue amelioree - Google Patents
Compresseur electrique avec roue amelioreeInfo
- Publication number
- EP3314127A1 EP3314127A1 EP16741668.4A EP16741668A EP3314127A1 EP 3314127 A1 EP3314127 A1 EP 3314127A1 EP 16741668 A EP16741668 A EP 16741668A EP 3314127 A1 EP3314127 A1 EP 3314127A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressor
- wheel
- ring
- shaft
- support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
- F04D29/2227—Construction and assembly for special materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/40—Organic materials
- F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
Definitions
- the present invention relates to the field of electric compressors, and more particularly to an electric supercharger.
- an electric compressor is a device used to supercharge a heat engine, operating with an electric motor. More specifically, the compressor comprises a compressor wheel driven by an electric motor.
- the electric compressor is placed on the air intake line of an internal combustion engine, in addition to a turbocharger.
- the electric compressor plays the same role as the turbocharger, namely increase the intake pressure of the fresh gases in the engine, but is used in particular during transient phases to overcome turbocharger response time problems.
- the compressor wheel is aluminum alloy, and is either molded or machined in the mass.
- the wheel is disposed at one end of the electric compressor shaft and held in place by a nut.
- a disadvantage of this type of aluminum alloy wheel is that its inertia is not optimized. Indeed, the response time of the electric compressor must be as short as possible, and a significant inertia increases this response time and also the energy required for the acceleration of the electric compressor.
- the present invention therefore aims to overcome one or more of the disadvantages of the devices of the prior art by proposing an electric compressor with an improved compressor wheel, thus reducing the inertia and consequently the response time of the compressor.
- the present invention proposes an electric compressor comprising a shaft driven in rotation by an electric motor by means of bearings, the shaft driving in rotation a compressor wheel, the compressor comprising a sealing ring bearing ring mounted around it the shaft between the bearings 4 and the compressor wheel, the wheel being plastic overmolded on an overmolding support ring.
- an electric compressor having a shaft rotated by an electric motor through bearings, the shaft rotating a compressor wheel, the compressor having a seal ring mounted around the shaft between the bearings and the compressor wheel, the wheel being plastic overmolded on a support ring and completely covers the end of the shaft comprising the wheel.
- the electric compressor with an improved compressor wheel thus reduces the inertia and consequently the response time of the compressor, also improving the airflow for better efficiency of the wheel.
- the end of the wheel is in the form of an ogive.
- the end of the wheel is overmolded on the end of the support ring.
- the support ring is made of steel.
- the overmolding support ring is an additional ring of the ring bearing segment.
- the support ring is formed by the ring bearing segment.
- the shaft comprises a thread, at its end opposite to that where is positioned an electric motor.
- the wheel is held in place with a nut screwed onto the end of the shaft provided with a thread.
- the support ring comprises a tapping, at its end opposite to that where is positioned at least one sealing segment, for screwing on the shaft.
- the ring segment ring has a length adapted so as to carry at least one sealing segment and the overmolded wheel.
- the motor is a variable reluctance or permanent magnet motor.
- the compressor is an electric supercharging compressor of a heat engine.
- FIG. 1 is a diagrammatic representation in section showing an electric compressor
- FIG. 2 is a diagrammatic representation in section showing part of an electric compressor according to one embodiment of the invention
- FIG. 3 is a diagrammatic representation in section showing part of an electric compressor according to another embodiment of the invention.
- FIG. 4 is a diagrammatic representation in section showing part of an electric compressor according to another embodiment of the invention.
- FIG. 5 is a diagrammatic representation in section showing an electric compressor
- FIG. 6 is a schematic sectional representation showing a portion of an electric compressor according to one embodiment of the invention.
- the present invention relates to an electric compressor.
- the term electric compressor an air compressor, volumetric or not and for example centrifugal or radial, driven by an electric motor, for the purpose of supercharging a heat engine.
- the electric motor is an asynchronous DC or AC motor, or any type of electric motor of the same type.
- the electric motor is a variable reluctance motor (also called SRM machine for Switched Reluctance Motor according to English terminology).
- the motor is a permanent magnet motor.
- Figure 1 illustrates an example of an electric compressor 1.
- the electric compressor 1 comprises at least one electric motor 8, bearings 4 and a compressor wheel 3.
- the electric motor allows the rotation of a shaft 2 of the electric compressor via the bearings 4.
- the shaft 2 thus rotates the wheel 3 of the compressor 1. More precisely one end of the shaft 2 is rotated by the electric motor, and another end of the shaft 2 rotates the wheel 3 of the compressor.
- the compressor 1 conventionally comprises a volute 5 allowing the passage of air from the compressor 1.
- the compressor 1 comprises an electronics assembly 6 for controlling the electric compressor 1.
- the assembly is arranged in a compressor casing 7.
- This intermediate portion of the shaft 2 comprises a sealing member, and more specifically a dynamic sealing member disposed between the wheel and the electric machine.
- this member is formed of at least one first sealing segment 22 positioned on the side of the compressor wheel.
- the sealing member comprises a second segment Sealing 23 positioned on the side of the bearings 4. This or these segments have the role of protecting the bearings from pollution that may come from the compressor wheel.
- At least one sealing segment is carried by a ring 21, 210 door segment.
- the ring is made of steel.
- the ring is made of treated steel to increase the hardness.
- the segments are arranged in two recesses 220, 230 formed in the ring.
- the ring is disposed against a flat wall of the shaft 2 or in another recess dug in the shaft 2. This other recess is configured to allow easy insertion of the ring on the shaft 2.
- the wheel of the compressor 1 is a paddle wheel illustrated in detail in FIGS. 2, 3 and 4.
- this wheel is plastic and overmolded.
- the plastic is a plastic resistant to at least 150 ° C, preferably resistant to 200 ° C.
- the plastic is polyetheretherketone or PEEK (for PolyEtherEtherKetone according to the English terminology).
- the wheel 3 is overmolded on a support ring 211, 210 overmolding.
- the support ring is metallic. More specifically, the support ring 210, 211 is made of steel, preferably treated steel.
- This support ring 211, 210 passes through the wheel 3 longitudinally.
- One end of the support ring is in contact with a shoulder 214 of the shaft, so that the clamping force passes through the support ring.
- the overmolding support ring is an additional ring 211 illustrated in FIG. end of the shaft following the ring 210 door segment.
- the wheel is overmolded on this additional ring.
- the support ring is formed by the ring bearing segment.
- the wheel 3 is overmolded on the ring 210 door segment.
- the wheel 3 is overmolded at the end of the ring not including the segment or segments.
- the length of the ring 210 is then adapted so as to be able to bear the sealing segment or segments and the overmolded wheel illustrated in FIGS. 3 and 4.
- the overmoulding on the ring 210 does not require any additional piece with respect to the wheel version. aluminum of the prior art. Overmolding directly on the ring also reduces the size of the compressor.
- the overmolded wheel 3 is held in place with a nut 9 disposed at the end of the shaft.
- the nut 9 is supported on the end of the ring 210, 211 support.
- the thread for tightening the nut 9 is formed directly at the end of the shaft 2.
- the tightening by the nut 9 is improved by the support on the treated steel ring. Indeed, a first end of the support ring is in contact with the nut, while the second end is in contact with a shoulder of the shaft, so that the clamping force passes through the ring.
- the wheel 3 is held in place by a thread formed directly at the end of the support ring, illustrated in FIG. 4.
- it is the ring which is screwed directly onto the shaft 2.
- the nut is removed, since its function is integrated in the ring. The hardness of the ring makes the tapping mechanically strong, allowing effective tightening.
- the wheel 3 is overmolded to the end 20 of the shaft 2 comprising the wheel 3.
- the end 20 of the shaft 2 is thus completely covered by the wheel 3.
- the wheel has a pointed end 31 at the end 20 of the shaft 2.
- the ogive 31 is an extension of the overmolded wheel 3.
- the segment-carrying ring 21 is extended to the end 20 of the shaft 2.
- the end 31 of the wheel 3 is overmolded on the end 210 of the ring 21 segment door.
- Such a wheel 3 thus has no opening at its end.
- the end of the ogival-shaped wheel 31 allows the wheel to have a more aerodynamic profile. The airflow is less disturbed, and is better guided.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1555968A FR3038017B1 (fr) | 2015-06-26 | 2015-06-26 | Compresseur electrique avec roue amelioree |
FR1555967A FR3038016B1 (fr) | 2015-06-26 | 2015-06-26 | Compresseur electrique avec roue amelioree |
PCT/FR2016/051564 WO2016207573A1 (fr) | 2015-06-26 | 2016-06-24 | Compresseur electrique avec roue amelioree |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3314127A1 true EP3314127A1 (fr) | 2018-05-02 |
Family
ID=56507618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16741668.4A Ceased EP3314127A1 (fr) | 2015-06-26 | 2016-06-24 | Compresseur electrique avec roue amelioree |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3314127A1 (fr) |
WO (1) | WO2016207573A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190113046A1 (en) * | 2017-10-16 | 2019-04-18 | Borgwarner Inc. | Polymer Compressor Wheel with Co-Molded Bore Insert |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3801226A (en) * | 1970-08-28 | 1974-04-02 | Goulds Pumps | Pump impeller |
DE3632259C2 (de) * | 1986-09-23 | 1995-11-23 | Eaton Gmbh | Verfahren zur Herstellung eines Pumpenlaufrades für eine Kühlmittelpumpe in einem Kraftfahrzeug |
US5076765A (en) * | 1988-08-03 | 1991-12-31 | Nissan Motor Company, Altd. | Shaft seal arrangement of turbocharger |
DE102006060836A1 (de) * | 2006-12-22 | 2008-06-26 | Daimler Ag | Verdichter- oder Turbinenlaufrad |
-
2016
- 2016-06-24 WO PCT/FR2016/051564 patent/WO2016207573A1/fr active Application Filing
- 2016-06-24 EP EP16741668.4A patent/EP3314127A1/fr not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
WO2016207573A1 (fr) | 2016-12-29 |
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Inventor name: MARTIN, NICOLAS Inventor name: LALLEMANT, MATHIEU |
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