EP4331090A1 - Moteur électrique comportant un auvent de ventilateur - Google Patents

Moteur électrique comportant un auvent de ventilateur

Info

Publication number
EP4331090A1
EP4331090A1 EP22720299.1A EP22720299A EP4331090A1 EP 4331090 A1 EP4331090 A1 EP 4331090A1 EP 22720299 A EP22720299 A EP 22720299A EP 4331090 A1 EP4331090 A1 EP 4331090A1
Authority
EP
European Patent Office
Prior art keywords
fan
electric motor
hood
motor according
protective hood
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.)
Pending
Application number
EP22720299.1A
Other languages
German (de)
English (en)
Inventor
Li Jinchang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SEW Eurodrive GmbH and Co KG
Original Assignee
SEW Eurodrive GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN202110468376.5A external-priority patent/CN115250026A/zh
Application filed by SEW Eurodrive GmbH and Co KG filed Critical SEW Eurodrive GmbH and Co KG
Publication of EP4331090A1 publication Critical patent/EP4331090A1/fr
Pending legal-status Critical Current

Links

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
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft

Definitions

  • the invention relates to an electric motor with a fan cover.
  • the invention is therefore based on the object of further developing an electric motor with improved protection.
  • the object is achieved with the electric motor according to the features specified in claim 1.
  • a protective hood is fastened to the fan hood by means of holding means.
  • the advantage here is that, despite the openings in the fan cover that are necessary for the intake, improved protection against the effects of the environment can be achieved, in particular, for example, rain.
  • the fan hood is on a housing or housing part, in particular a bearing flange for receiving a bearing of the rotor shaft of the electric motor. fastened, in particular fastened by means of screws.
  • the advantage here is that the fan cover is stable and can be securely fastened.
  • the air flow conveyed by the fan can be made available to flow out between the fan cover and the bearing flange in such a way that the air flow flows along the cooling fins of the housing or housing part.
  • the fan cowl surrounds a fan wheel which is connected to the rotor shaft in a rotationally fixed manner.
  • the advantage here is that the fan cover directs the air flow in a suitable manner and protects the fan wheel as well as possible from mechanical influences.
  • the fan hood has a fan grille on its side facing away from the housing or housing part, in particular on the front side.
  • the protective hood is designed to be watertight and/or airtight, ie in particular it does not have any continuous recesses in the axial direction.
  • the advantage here is that the protective hood acts as a rain guard when the axis of rotation of the rotor shaft is aligned in the vertical direction. This is an advantage, for example, for outdoor agitators, since the electric motor drives the agitator.
  • the holding means have bolts which are aligned in the axial direction.
  • the bolts have an axially directed threaded hole on both sides, into which screws are screwed, with the screw head of a first screw pressing the inside of the fan cowl towards the bolt, in particular via a washer, with a washer being arranged between the bolt and the fan cowl, with the screw head of the second screw presses the protective hood towards the bolt, in particular via a washer.
  • the radial distance area covered by the protective hood includes and/or contains the radial distance area covered by the fan hood, in particular wherein the radial distance area covered by the protective hood in the axial area covered by the fan hood is radially spaced from that of the Fan cover covered radial distance range, in particular wherein the respective radial distance is related to the axis of rotation of the rotor shaft of the electric motor.
  • the advantage here is that the protective hood covers the fan hood and thus protects the motor even if the water flow is at an angle.
  • the area covered by the protective hood in the axial direction overlaps with the area covered by the fan hood in the axial direction.
  • the protective hood surrounds the fan hood radially, in particular at least in the area covered by the fan wheel in the axial direction, in particular with the greatest radial distance of the protective hood relative to the axis of rotation of the rotor shaft being greater than the greatest radial distance of the fan hood.
  • the vertical projection of the protective hood is in a plane whose normal direction, parallel to the axis of rotation of the rotor shaft, includes and/or contains the vertical projection of the fan hood in this plane.
  • the advantage here is that rain protection can also be achieved with a non-vanishing wind force.
  • the fan grille of the fan hood is preferably arranged far enough in the interior area surrounded by the protective hood that only when water rises can it enter through the fan grille from the outside. This prevents rain from penetrating, even in extremely strong winds.
  • the protective hood is spaced apart from the fan hood in the axial direction and in the radial direction.
  • the advantage here is that the sucked-in air flow can enter the intermediate area between the protective hood and the fan hood from the side and then initially flows counter to the axial direction on the outside of the fan hood until it flows radially inwards and then enters through the fan grille.
  • the largest diameter of the bolt measured in the plane or in a plane parallel thereto, is smaller than the largest inside diameter of the grille opening of the fan grille of the fan cowl, in particular with the largest diameter of the disk or disks touching the fan cowl being larger than the largest clear inner diameter of the grille opening of the fan grille of the fan cowl.
  • the bolts have a hexagonal and/or hexagonal cross section.
  • the advantage here is that it can be actuated during production with a hexagonal tool, in particular an open-end wrench.
  • FIG. 1 shows a side view of a sectioned area of an electric motor according to the invention with a protective hood 4 .
  • FIG. 2 shows a region of FIG. 1 on an enlarged scale.
  • the protective hood 4 is shown in an oblique view.
  • FIG. 4 shows a bolt 5 for fastening the protective hood 4 to a fan hood 3 of the electric motor in an oblique view.
  • the electric motor has a fan wheel 2 which is connected in a torque-proof manner to the rotor shaft of the electric motor, the rotor shaft being rotatably mounted via bearings which are accommodated in a housing or housing part 1 of the electric motor which is designed in one or more pieces.
  • a fan hood 3 is connected to the housing or housing part 1 , in particular by means of screws screwed into threaded bores in the housing or housing part 1 , the screw heads of which press the fan hood 3 onto the housing or housing part 1 .
  • the fan shroud 3 surrounds and protects an axial end area of the rotor shaft together with the fan wheel 2 attached and firmly connected to it.
  • the fan cowl 3 On its axial end face facing away from the housing part 1 , the fan cowl 3 has a fan grille 20 through which the airflow sucked in by the fan wheel 2 flows, in particular towards the fan wheel 2 .
  • the axial direction is related to the axis of rotation of the rotor shaft and is therefore parallel to it.
  • the fan grille 20 is preferably designed as a two-dimensional, ie in particular flat, regular arrangement of grille openings.
  • the lattice openings face each other shaped in the same way, in particular identical to one another.
  • the grid openings are square, triangular or circular.
  • a protective hood 4 is attached to the fan hood 3 at a distance from the fan hood 3 by means of bolts 5 .
  • the bolts 5, which are preferably hexagonal, in particular hexagonal, have a threaded bore on both axial sides, so that a first screw screwed into the first of the threaded bores, which protrudes through the protective hood 4, presses a washer 22 against the protective hood 4 with its screw head and thus presses the bolt 5 onto the inside of the protective hood 4.
  • the washer 22 covers at least that of the grid openings through which the screw protrudes.
  • the outside diameter of the washer 22 is larger than the largest clear inside diameter of the grid opening and/or each of the grid openings.
  • a second screw is also screwed into the threaded hole of the bolt 5, this second screw going through the fan shroud 3 and the screw head of this second screw presses on the inside of the fan shroud 3 via an interposed washer 22, so that the Bolt 5 is pressed towards the fan shroud 3 via a washer 22 arranged between the bolt 5 and the shroud 3 .
  • the vertical projection of the protective hood 4 in a plane whose normal direction is aligned parallel to the axis of rotation of the rotor shaft includes the vertical projection of the fan hood 3 in this plane, in particular completely.
  • the perpendicular projections are both preferably cuboid.
  • the bolts 5 are aligned parallel to the axial direction, in particular with the bore axis of the threaded bores being aligned parallel to the axial direction, ie in particular to the axis of rotation of the rotor shaft.
  • Reliable protection is thus achieved by means of the protective hood 4 against dirt which would reach the motor from the axial direction.
  • Rain protection is achieved in particular in the case of vertical assembly, that is to say when the axis of rotation is aligned in a vertical direction.
  • the fan hood is preferably made of sheet metal, so that the fan hood causes the lowest possible noise emission due to the stiffest possible design and a sufficiently large holding force to hold the protective hood 4 can be accommodated.
  • the hexagonal shape results in a particularly stable covering of the lattice opening, especially if it is square, triangular or circular.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un moteur électrique comprenant un auvent de ventilateur auquel est fixé un capot de protection par des moyens de retenue.
EP22720299.1A 2021-04-28 2022-04-12 Moteur électrique comportant un auvent de ventilateur Pending EP4331090A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN202110468376.5A CN115250026A (zh) 2021-04-28 2021-04-28 具有风机罩的电机
DE102021003378 2021-07-01
PCT/EP2022/025144 WO2022228716A1 (fr) 2021-04-28 2022-04-12 Moteur électrique comportant un auvent de ventilateur

Publications (1)

Publication Number Publication Date
EP4331090A1 true EP4331090A1 (fr) 2024-03-06

Family

ID=81454647

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22720299.1A Pending EP4331090A1 (fr) 2021-04-28 2022-04-12 Moteur électrique comportant un auvent de ventilateur

Country Status (3)

Country Link
EP (1) EP4331090A1 (fr)
DE (1) DE102022001258A1 (fr)
WO (1) WO2022228716A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3635327A1 (de) 1986-10-17 1988-04-28 Felten & Guilleaume Energie Luefter mit luefterhaube fuer geraeuscharme drehstrommotoren
DE10314697B4 (de) * 2003-03-28 2005-11-10 Stromag Ag Antriebsvorrichtung mit einer Antriebseinheit in explosionsgeschützter Ausführung
DE102008028622A1 (de) 2008-06-18 2009-12-24 Sew-Eurodrive Gmbh & Co. Kg Elektromotor
DE102008028605A1 (de) * 2008-06-18 2009-12-24 Sew-Eurodrive Gmbh & Co. Kg Elektromotor mit Bremse, Bremse und Verfahren
DE102008028603A1 (de) 2008-06-18 2009-12-24 Sew-Eurodrive Gmbh & Co. Kg Elektromotor mit Geber
DE102008028604A1 (de) 2008-06-18 2009-12-24 Sew-Eurodrive Gmbh & Co. Kg Elektromotor mit elektromagnetisch betätigbarer Bremse und Bremse

Also Published As

Publication number Publication date
DE102022001258A1 (de) 2022-11-03
WO2022228716A1 (fr) 2022-11-03

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