Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
  • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
  • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
  • B04B—CENTRIFUGES
  • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
  • B04B9/02—Electric motor drives
  • B04B9/04—Direct drive
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
  • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
  • H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
  • H02K5/1675—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at only one end of the rotor
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
  • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
  • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
  • H02K7/16—Structural association with mechanical loads, e.g. with hand-held machine tools or fans for operation above the critical speed of vibration of the rotating parts

Definitions

• the present invention relates to an electric motor for driving an inertial separator.
• electric motors can be used to drive equipment exposed to fluids or working with fluids.
• an electric motor may be used to drive a liquid pump or to drive a centrifuge or other inertial separator, eg for separating oil residues in a blow-by-gas line of an internal combustion engine.
• Such radial seals are relatively expensive and are exposed during operation of the electric motor wear, so that they can be leaking over time.
• the present invention addresses the problem of providing for an electric motor an improved embodiment, which is characterized in particular by a durable and effective seal.
• the invention is based on the general idea of separating a stator space receiving the stator from a rotor space receiving the rotor with the aid of a housing bottom.
• said housing bottom is passed with a non-magnetic portion through a radially formed between the rotor and stator annular gap.
• a drain channel can be arranged on the non-magnetic portion of the housing bottom, which communicates with the preferably cylindrical rotor space and which is led out through the stator space from the stator housing.
• the implementation of the drainage channel through the stator housing can be realized easily and inexpensively, since there are no relative movements between the stator housing and the drainage channel.
• a bearing support on which the rotor is rotatably supported by means of a rotor bearing be configured as a collecting tray and have a flow in which the rotor bearing is arranged.
• a liquid e.g. an oil
• the draining oil is inevitably passed through the rotor bearing, whereby this is automatically lubricated.
• the oil flowing into the rotor chamber can be removed via the previously mentioned drainage channel.
• FIGURE 1 shows a greatly simplified longitudinal section through an electric motor according to the invention.
• an electric motor 1 according to the invention comprises a stator housing 2, a stator 3 arranged therein and a rotor 4, which is arranged concentrically with respect to the stator 3 with respect to a rotation axis 5.
• the electric motor 1 is designed as a brushless electric motor 1.
• the stator 3 has at least one electromagnetic coil 6 for generating an electromagnetic field rotating about the rotation axis 5.
• the rotor 4 has at least one permanent magnet 7 in order to be able to introduce a torque into the rotor 4 by means of electromagnetic forces.
• annular gap 8 is formed, which also extends concentrically to the axis of rotation 5.
• the electric motor 1 is equipped with a housing bottom 9, which extends substantially transversely to the axis of rotation 5.
• the housing base 9 is thus selected taltet and arranged relative to the other components of the electric motor 1, that he with a non-magnetic portion 10 which is arranged centrally with respect to the axis of rotation 5 in the housing bottom 9, through the annular gap 8 extends therethrough.
• Said portion 10 thus also extends radially between the stator 3 and rotor 4 and in particular also concentric with the axis of rotation 5.
• the housing bottom 9 is configured and arranged such that it has a stator housing 11 located inside the stator housing 11 in which the stator 3 is arranged, separated from a rotor chamber 12 in which the rotor 4 is arranged.
• stator housing 2 can close the stator space 11 hermetically to the outside.
• the stator 3 is attached to a stator 13, which is characterized by a relatively high rigidity.
• the stator carrier 13 is made of a metal.
• the stator support 13 is designed as a heat conductor in order to dissipate the heat generated by the at least one coil 6 during operation of the electric motor 1 from the stator space 11. Suitable heat conducting materials for this purpose are, for example, aluminum or copper or brass or alloys thereof.
• the heat from the interior of the stator housing 2 leads to the outside, the stator support 13 is arranged with respect to the axis of rotation 5 axially between the stator housing 2 and the housing bottom 9, thereby forming a kind of centrally open intermediate floor.
• the contacting between the stator 3 and the stator carrier 13 is configured as large as possible in order to achieve an intensive heat conduction.
• the stator housing 2 is fastened, for example by means of at least one screw connection 14.
• the housing base 9 is also fastened to the stator support 13; corresponding attachment points are not shown here and may preferably also be formed by screwing.
• the stator housing 2 and thus the entire electric motor 1 can be attached to a corresponding periphery.
• this periphery is a supporting structure to which the electric motor 1 is fastened in the context of its respective application.
• the non-magnetic portion 10 encloses the rotor space 12 and is preferably configured as a cylinder portion.
• the rotor chamber 12 is open at a side facing away from the stator 11 side. This open side is in the installed state above.
• the rotor 4 projects through the open side into the rotor chamber 12.
• a flow channel 15 is arranged on the non-magnetic section 10. This drainage channel 15 communicates with the rotor chamber 12 and is led out of the stator housing 2 through the stator chamber 11. In doing so, the passageway 15 extends concentrically and coaxially to the axis of rotation 5.
• the passage through the stator housing 2 is sealed in a suitable manner, for example by means of an O-ring 16.
• the drainage channel 15 is preferably integrally formed on the cylindrical portion 10.
• the cylindrical portion 10 is preferably integrally formed on the housing bottom 9.
• the housing bottom 9 is an injection molded part made of plastic, which has the cylindrical portion 10 and the discharge channel 15 integrally.
• a printed circuit board 17 for such electrical and / or electronic components may be arranged in the stator space 11.
• This printed circuit board 17 includes an opening 18 which is centrally located here with respect to the axis of rotation 5 and is penetrated by the flow channel 15.
• the printed circuit board 17 may be fixed by an indicated screw 19 or by other fastening means on the stator housing 2.
• a rotor bearing 20, preferably a radial bearing, is provided, which is arranged on a bearing carrier 21.
• the rotor 4 is mounted with a rotor shaft 22 in this rotor bearing 20 and can also be axially supported on the bearing bracket 21 via the rotor bearing 20.
• the bearing support 21 in turn is axially supported on the housing bottom 9 and can, for example, on this be fixed by means of an indicated screw 23 or with other fasteners.
• the bearing carrier 21 is preferably designed as a collecting tray and has a central outlet 24. In the process
• the rotor bearing 20 is arranged.
• the configuration as a drip tray is achieved in the bearing carrier 21 in that it has a radially outer with respect to the axis of rotation 5, axially projecting annularly closed collar
• the drain 24 is in the mounted state below the collar 25 and that the drain 24 is in the mounted state below the collar 25.
• the bearing carrier 21 or the drip tray is open at the top and can thus catch liquid coming from above and discharge it through the outlet 24.
• the drain 24 is open to the rotor chamber 24, whereby a communicating connection between the drain 24 and the rotor chamber 12 and ultimately the drain channel 15 is formed.
• the non-magnetic portion 10 is suitably dimensioned so that it can come to bear radially on the stator 3, while at the same time radially to the rotor 4, a distance can be maintained.
• the rotor 4 is designed as a so-called internal rotor, since the rotor 4 is arranged radially inward relative to the stator 3.
• the stator 3 is designed annular in the inner rotor.
• the rotor 4 is designed as a so-called external rotor. is taltet, which is characterized by an annular shape and a radially inner stator 3.
• the electric motor 1 is suitable for driving any desired unit. Particularly advantageous is the use of the electric motor 1 for driving units that work with fluids, especially liquids.
• the electric motor 1 may be used to drive a pump.
• the electric motor 1 serves to drive an inertia separator 26.
• an inertia separator 26 can be used, for example, in an internal combustion engine, which is arranged in particular in a motor vehicle, in order there to blow-by gases of entrained oil and others To clean residues.
• an inertial separator can be used for the secondary flow cleaning of a lubricating oil circuit of the internal combustion engine.
• the inertial separator 26 includes a rotor 27 which is drive-coupled to the rotor 4 of the electric motor 1.
• the rotor 27 of the inertial separator 26 may be configured, for example, as a centrifuge or as a plate separator.
• the rotor 27 of the inertia separator 26 is connected in a rotationally fixed manner to the rotor shaft 22 of the rotor 4 of the electric motor 1.
• a separator housing 28 of the inertia separator 26 encloses a raw space 29, in which the impurities to be deposited, in the For example, the oil is separated, collected and discharged.
• the separator housing 28 is attached directly to the housing bottom 9, for example by means of an indicated screw 30 or other suitable fastening means.
• the housing bottom 9 is arranged on the separator housing 28 on a side facing the electric motor 1.
• the raw space 29 is open to the collecting tray or to the bearing carrier 21 and thus open to the outlet 24 and ultimately to the rotor chamber 12.
• the oil deposited in the green space 29 can thus first collect in the bearing carrier 21 or in the drip tray, and then flow off via the outlet 24 through the rotor bearing 20 into the rotor chamber 12 at a corresponding oil level. At the same time, an automatic lubrication of the rotor bearing 20 is provided. From the rotor chamber 12, the oil is discharged through the flow passage 15 through the stator 11. Penetration of oil into the stator 11 is thus not possible under normal operating conditions.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Motor Or Generator Frames (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
• Centrifugal Separators (AREA)
• Permanent Magnet Type Synchronous Machine (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=37628486

Family Applications (1)

Country Status (7)

Families Citing this family (26)

Family Cites Families (16)

• 2005
  • 2005-12-22 DE DE102005062021A patent/DE102005062021A1/de not_active Withdrawn
• 2006
  • 2006-10-21 WO PCT/DE2006/001859 patent/WO2007071220A1/de not_active Ceased
  • 2006-10-21 US US12/158,601 patent/US8067864B2/en not_active Expired - Fee Related
  • 2006-10-21 JP JP2008546086A patent/JP5033139B2/ja not_active Expired - Fee Related
  • 2006-10-21 EP EP06805458A patent/EP1964246A1/de not_active Withdrawn
  • 2006-10-21 CN CN2006800448562A patent/CN101390274B/zh not_active Expired - Fee Related
  • 2006-10-21 BR BRPI0620147-4A patent/BRPI0620147A2/pt not_active Application Discontinuation

Non-Patent Citations (1)

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