EP4305735A1 - Elektromotor, aufweisend ein statorgehäuse - Google Patents
Elektromotor, aufweisend ein statorgehäuseInfo
- Publication number
- EP4305735A1 EP4305735A1 EP22708476.1A EP22708476A EP4305735A1 EP 4305735 A1 EP4305735 A1 EP 4305735A1 EP 22708476 A EP22708476 A EP 22708476A EP 4305735 A1 EP4305735 A1 EP 4305735A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electric motor
- tube
- housing
- motor according
- bearing flange
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/14—Casings; Enclosures; Supports
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/02—Casings or enclosures characterised by the material thereof
-
- 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
- H02K5/06—Cast metal casings
-
- 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
- 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
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
-
- 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
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
Definitions
- Electric motor having a stator housing
- the invention relates to an electric motor having a stator housing.
- the housing of an electric motor is made of a material which has a specified chemical property, in particular for use of the electric motor in an application with specified chemical requirements.
- a modular electric motor system is known from WO 2020/109897 A1.
- the invention is therefore based on the object of further developing an electric motor, in which case the electric motor should be able to be used in an environment with specified chemical requirements and should be able to be designed as compactly as possible.
- the object is achieved with the electric motor according to the features specified in claim 1.
- stator housing is designed as a composite part, which is formed from a radially inner part and a part radially outer thereto, and/or the stator housing has a tubular part, to which a tube is plugged on, wherein the pipe part is non-positively connected to the pipe.
- the advantage here is that the motor can be designed as compactly as possible and still be compatible with a desired chemical requirement, ie in particular with as low a requirement as possible Mass, heat can be removed as efficiently as possible and can still be designed with an outside that meets the chemical requirements, in particular that is chemically stable.
- stator housing which is formed as a composite part and/or from the tube and the tube part, is formed from a radially inner part and a radially outer part thereto.
- the outer part in particular the pipe, has the desired chemical property, but can be designed with very thin walls, so that the mechanical and heat conduction-related properties are fulfilled by the inner part, in particular the pipe part.
- the inner part can be made of a material with good thermal conductivity, which quickly spreads the heat of the stator and dissipates it to the housing parts arranged axially on both sides, in particular to a bearing flange and a housing part.
- the housing part and the bearing flange each accommodate a bearing of the rotor shaft and must therefore also absorb heat from the bearing and dissipate it to the environment, the housing part and the bearing flange have a large thermal capacity and can therefore absorb the heat flows from both heat sources and without any particular temperature increases dissipate to the environment.
- the pipe is made of a first material, the pipe part being made of a second material, the density of the first material being greater than the density of the second material, in particular the density of the first material being twice or more than is twice the density of the second material.
- the first material is a metal and the second material is a metal, in particular the specific thermal conductivity of the second material being greater than, in particular more than twice, the specific thermal conductivity of the first material.
- the pipe is made of steel, in particular high-grade steel, and the pipe part is made of a light metal, in particular aluminum.
- the advantage here is that a chemically stable surface can be provided towards the environment and the light metal can be used on the inside in order to efficiently dissipate heat and save mass.
- the pipe part is connected to the pipe in a warm-joined manner.
- the advantage here is that the stator housing can be produced in a simple manner as a composite part.
- the tube and the tube part there is a temperature difference between the tube and the tube part, in particular of more than 40 Kelvin, in particular of more than 150 Kelvin, during production of the stator housing before and/or when the tube is pushed onto the tube part.
- the advantage here is that the non-positive connection has a high load-bearing capacity and the stator housing can therefore be designed as a resilient composite part that is compact and can be designed with little mass, while still having a stable chemical surface to the environment, in particular a stainless steel surface.
- a rotor shaft of the electric motor is rotatably mounted, in particular relative to the stator housing, by means of a first bearing that is accommodated in a bearing flange of the electric motor and by means of a second bearing that is accommodated in a housing part.
- first bearing that is accommodated in a bearing flange of the electric motor
- second bearing that is accommodated in a housing part.
- the tube, the bearing flange and the housing part consist of and/or are manufactured from the first material, in particular stainless steel.
- the first material in particular stainless steel.
- At least one traction device presses the bearing flange and the housing part onto the tubular part, with the tubular part being arranged between the bearing flange and the housing part.
- the advantage here is that the tubular part can be clamped by the traction mechanism between the bearing flange and the housing part.
- the tube part is in particular partially inserted into the bearing flange, in particular it is inserted into a cylindrical recess of the bearing flange.
- the advantage here is that the tubular part can be centered in the bearing flange and can be accommodated safely and securely.
- the tube part is in particular partially inserted into the housing part, in particular it is inserted into a cylindrical recess of the housing part.
- the advantage here is that the tubular part can be centered in the housing part and can be accommodated safely and securely.
- a seal in particular an O-ring, is slipped onto the pipe part, which seals the pipe from the housing part, in particular the seal being accommodated in an annular groove of the pipe part, in particular the seal being placed axially between the pipe and the housing part is interposed.
- the advantage here is that the tube is sealed off from the housing part and also from one or the bearing flange, so that the outer surface of the motor consists only of the material of the bearing flange, the housing part and the tube and also of the material of the seal, in particular this material being similar to the material of a shaft sealing ring accommodated in the bearing flange, which seals the bearing flange to the rotor shaft.
- the area of the rotor shaft that protrudes outwards is also included in the outer surface.
- the O-ring which can be accommodated via a ring groove, is positioned by means of the ring groove, which means that the tube can also be positioned axially.
- a further seal in particular an O-ring, is slipped onto the pipe part, which seals the pipe from the bearing flange, in particular from the environment, in particular the seal being accommodated in an annular groove of the pipe part, in particular the seal being axial is interposed between the tube and the bearing flange.
- the advantage here is that a high degree of tightness, ie a high degree of protection, can be produced.
- the seal is snapped into an annular groove so that the seal is positioned axially.
- the axial area covered by the tube part in the axial direction i.e.
- the axial area covered by the tube part in the axial direction overlaps with the area covered by the bearing flange in the axial direction, the area covered by the tube in the axial direction being spaced apart from that of the bearing flange area covered in the axial direction.
- a cover is placed on the housing part at its end area facing away from the pipe part, so that a connection area is surrounded by the cover and housing part to form the housing, in particular with connection means for connecting lines of a supply cable, which is provided through a cable bushing, in particular cable gland, in the connection area. of the cover is led into the connection area, with stator winding lines, in particular with the stator winding wire, in particular the stator winding.
- a sensor for detecting the angular position of the rotor shaft is arranged on the axial end area of the rotor shaft, the sensor housing of which protrudes into the connection area.
- the sensor can be arranged within the connection area protected by the cover part and the housing part and is therefore not exposed to the external environment and its chemical requirements.
- the respective traction means protrudes through a respective axially continuous recess arranged in the tubular part. The advantage here is that the traction mechanism is arranged in a protected manner and that a simple, inexpensive and compact connection can thus be achieved.
- the respective traction means is designed as a long screw screwed into a respective threaded bore of the bearing flange, which has a screw head on its first axial end area and an external thread on its other axial end area, or as a pull rod with nuts screwed on, or as a long screw with a nut screwed on executed.
- FIG. 1 shows an oblique view of an electric motor according to the invention.
- FIG. 2 shows a longitudinal section through the electric motor along a first section plane.
- FIG. 3 shows a longitudinal section through the electric motor along a second section plane.
- the electric motor is shown in section in an oblique view in FIG.
- FIG. 5 shows the stator of the electric motor in a sectioned oblique view.
- the stator of the electric motor is accommodated in a tube part 2, in particular an aluminum tube.
- the tubular part 2 is arranged between a bearing flange 4 and a housing part 5 .
- the rotor shaft 9 is rotatably mounted by means of a first bearing, which is accommodated in the bearing flange 4, and by means of a second bearing, which is accommodated in the housing part 5.
- An active part 8 is connected to the rotor shaft 9 in a torque-proof manner, in particular in a non-positive manner.
- a connection area 12 is also formed in housing part 5, in which supply lines, which are routed through a cable gland 11 into connection area 12 coming from the outside environment into connection area 12, are connected to connection means, which are each connected to stator winding wire to supply the stator winding 7, which is provided on a stator core 6, in particular wrapped around a stator core 6 is provided.
- the rotor shaft 9 protrudes with its first axial end area through the first bearing to the outside environment, so that a load to be driven can be connected, in particular a gear.
- the other axial end area of the rotor shaft 9 protrudes into an angle sensor which is designed to detect the angular position of the rotor shaft 9 and has a sensor housing 13 which is connected to the housing part 5 .
- the interior of the motor is thus sealed off from the connection area 12 .
- a shaft sealing ring accommodated in the bearing flange 4 seals the first axial end area of the rotor shaft 9 from the environment.
- the active part 8 preferably has a squirrel cage, so that the electric motor is designed as an asynchronous motor.
- the stator winding is designed as a three-phase winding.
- connection area 12 is delimited by a cover 14 placed on the housing part 5 and by the housing part 5 itself.
- the cable gland is arranged on the cover 14.
- the angle sensor has a first part, which is connected to the rotor shaft 9 in a torque-proof manner, and a second part, which is connected to the sensor housing 10 .
- the second part is embodied as a sensor, which is operatively connected to the first part, embodied as a transmitter, and in particular detects it.
- the pipe part 2 and the pipe 1 have a temperature difference, in particular of more than 40 Kelvin, in particular of more than 150 Kelvin, during the manufacture of the motor before they are pushed on.
- the tube 1 lies tightly against the tube part 2 and thus forms together with the tube part 2 a composite part that functions as a stator housing.
- the composite part thus preferably has steel on its radially outer side and preferably aluminum on its radially inner side.
- points the tubular part 2 on its radial outer side has an annular groove running continuously in the circumferential direction, in which the seal is accommodated and can thus be positioned axially. The seal 3 then positions the pipe 1.
- This additional seal 3 is also pushed onto the pipe part 2 .
- the tubular part 2 has on its radial outer side a further annular groove running continuously in the circumferential direction, in which the further seal 3 is accommodated and can thus be positioned axially.
- the further seal 3 then positions the pipe 1 in the axial direction with respect to the pipe part 2.
- the elastic deformation of the seals 3 generates only a small axially directed first force that acts on the pipe 1 .
- the amount of the second force generated by the traction means 30 and directed axially and introduced into the tubular part 2 is much greater, in particular at least ten times greater, than the first force.
- the traction means 30 are guided through recesses in the tubular part 2 .
- the recesses are designed as axial bores in the tubular part 2, so that the outer radial edge of the tubular part 2 has a cylindrical shape and the traction means 30 are surrounded by material all around, with the rigidity of the tubular part 2 also being very high.
- the recesses can also be implemented as indentations, in particular axial grooves open radially outwards, so that particularly simple assembly is made possible by inserting the traction means 30 coming from the radial direction.
- the tubular part 2 can preferably be produced as a continuously cast profile part, in particular as an aluminum continuously cast profile part.
- the traction means 30 are designed either as long bolts with nuts screwed on or as tie rods with nuts screwed on. In any case, the respective mother is attached the side of the bearing flange 4 facing away from the tubular part 2 or on the side of the housing part 5 facing away from the tubular part 2 .
- the laminated core of the stator consists of a stack of individual laminations, which is preferably connected by means of at least one clamp and/or in a stamped package and is non-positively connected to the tubular part 2, in particular the stator housing.
- the radial wall thickness of the pipe 1 is smaller, in particular at least four times smaller, than the radial wall thickness of the pipe part 2. A high level of rigidity can thus be achieved with a low mass of the composite part.
- the tube 1 can be made of steel, in particular stainless steel, so that the housing part 5, which can also be made of stainless steel, and the bearing flange, which can also be made of stainless steel, bring about a chemically uniform outer surface of the electric motor.
- the rotor shaft 9 can also be made of stainless steel.
- the electric motor has only stainless steel or sealing material on its entire surface. Therefore, the electric motor can be used in an appropriate environment.
- the stator housing is designed as a tubular composite part, the density of the material of the composite part being lower on its inside, in particular at least twice smaller than the density of its material on its outside.
- no angle sensor is provided instead of the angle sensor, so that the sensor housing 13 only functions as a mere covering of the axial shaft end of the rotor shaft 9 .
- I outer tube in particular steel tube, in particular stainless steel tube 2 tube part, in particular aluminum tube
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021001252 | 2021-03-09 | ||
| PCT/EP2022/053174 WO2022189086A1 (de) | 2021-03-09 | 2022-02-09 | Elektromotor, aufweisend ein statorgehäuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4305735A1 true EP4305735A1 (de) | 2024-01-17 |
Family
ID=80682466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22708476.1A Pending EP4305735A1 (de) | 2021-03-09 | 2022-02-09 | Elektromotor, aufweisend ein statorgehäuse |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240154492A1 (de) |
| EP (1) | EP4305735A1 (de) |
| CN (1) | CN116964903A (de) |
| DE (1) | DE102022000507A1 (de) |
| WO (1) | WO2022189086A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5430338A (en) * | 1994-02-14 | 1995-07-04 | Mcmillan Electric Company | Motor casing and method of manufacture |
| DE10039074A1 (de) | 2000-08-10 | 2002-02-21 | Kienle & Spiess Stanz & Druck | Motorteil, insbesondere Stator und/oder Rotor für elektrische Antriebe und Generatoren, insbesondere zum Einsatz in der Lebensmittelindustrie |
| JPWO2005099068A1 (ja) * | 2004-04-09 | 2008-03-06 | 株式会社ミツバ | ブラシレスモータ |
| JP2006333614A (ja) * | 2005-05-25 | 2006-12-07 | Asmo Co Ltd | 回転電機およびその製造方法 |
| JP2009060760A (ja) * | 2007-09-03 | 2009-03-19 | Jtekt Corp | 電動モータ |
| DE102014001267A1 (de) | 2014-01-31 | 2015-08-06 | Groschopp Ag Drives & More | Elektromotor |
| EP3373421B1 (de) * | 2017-03-09 | 2019-11-20 | Siemens Aktiengesellschaft | Gehäuseeinheit für eine elektrische maschine |
| IT201800010673A1 (it) * | 2018-11-29 | 2020-05-29 | Hydro Mec S P A | Kit motore elettrico e motore elettrico comprendente tale kit |
-
2022
- 2022-02-09 DE DE102022000507.7A patent/DE102022000507A1/de active Pending
- 2022-02-09 WO PCT/EP2022/053174 patent/WO2022189086A1/de not_active Ceased
- 2022-02-09 CN CN202280019185.3A patent/CN116964903A/zh active Pending
- 2022-02-09 US US18/549,289 patent/US20240154492A1/en active Pending
- 2022-02-09 EP EP22708476.1A patent/EP4305735A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20240154492A1 (en) | 2024-05-09 |
| CN116964903A (zh) | 2023-10-27 |
| DE102022000507A1 (de) | 2022-09-15 |
| WO2022189086A1 (de) | 2022-09-15 |
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Legal Events
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