WO2019129916A1 - Générateur permettant la production d'énergie électrique - Google Patents

Générateur permettant la production d'énergie électrique Download PDF

Info

Publication number
WO2019129916A1
WO2019129916A1 PCT/FI2017/050957 FI2017050957W WO2019129916A1 WO 2019129916 A1 WO2019129916 A1 WO 2019129916A1 FI 2017050957 W FI2017050957 W FI 2017050957W WO 2019129916 A1 WO2019129916 A1 WO 2019129916A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
generator
generator according
end housing
support beams
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
Application number
PCT/FI2017/050957
Other languages
English (en)
Inventor
Kimmo JÄMSÄ
Tero LOKASAARI
Samuel SUVANTO
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.)
Wartsila Finland Oy
Original Assignee
Wartsila Finland Oy
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
Application filed by Wartsila Finland Oy filed Critical Wartsila Finland Oy
Priority to PCT/FI2017/050957 priority Critical patent/WO2019129916A1/fr
Publication of WO2019129916A1 publication Critical patent/WO2019129916A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H02K5/15—Mounting arrangements for bearing-shields or end plates
    • 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
    • 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
    • H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields 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
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • 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
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air

Definitions

  • the present invention relates to a generator for producing electric energy in accordance with claim 1.
  • the main parts of a typical electric generator having a rated power of 10-15 MW include a cylindrical stator, a rotor arranged inside the stator and bearings supporting the rotor.
  • the stator of a typical generator in the above mentioned power range is supported by a load carrying stator pipe, which surrounds the stator.
  • Larger generators in the power range of 15-25 MW typically comprise several frame plates, which surround the outer perimeter of the stator.
  • the bearings are supported by pedestals, which are separate from the frame plates.
  • An object of the present invention is to provide an improved generator for pro ducing electric energy.
  • the characterizing features of the generator according to the invention are given in claim 1.
  • the generator comprises a rotatable rotor, a cylin drical stator having a first end and a second end and surrounding the rotor, a first end housing arranged at the first end of the stator, a second end housing arranged at the second end of the stator, and a plurality of longitudinal support beams arranged on the outer surface of the stator and attached to the stator, wherein the end housings are attached to the support beams by means of bolts.
  • the construction of the generator is simple and requires less welding than many known constructions. The construction is also fatigue resistant and easy to manufacture and assemble.
  • the bolts protrude into the sup port beams in the longitudinal direction of the support beams.
  • the generator comprises a base frame and the rotor and the stator are supported against the base frame via the end housings.
  • the stator is supported solely via the first end housing and the second end housing.
  • bearings of the rotor are supported by the end housings.
  • the generator has thus only a few load carrying parts, which makes the construction simple.
  • the support beams are attached to the stator by welds. According to another embodiment, the support beams are attached to the stator by means of bolts.
  • the number of the support beams is in the range of 15-35.
  • the number of the support beams can be, for instance, in the range of 20-30.
  • each end housing comprises a section having the shape of a truncated cone tapering axially outwards from the stator. This stiffens the construction in the longitudinal direction and reduc es vibrations.
  • each end housing is made as a one-piece cast.
  • each end housing is provided with air inlets for allowing cooling air flow through the end housing in the axial direction of the generator.
  • the rated power of the generator is at least 5 MW.
  • the rated power can be for example in the range of 5-35 MW, or in the range of 8-27 MW.
  • Fig. 1 shows the main parts of a generator according to an embodiment of the invention
  • Fig. 2 shows a stator of a generator according to an embodiment of the inven tion
  • Fig. 3 shows the stator and end housings of a generator
  • Fig. 4 shows an enlarged view of a joint between the stator and an end hous- ing
  • Fig. 5 shows an end housing of a generator.
  • Figure 1 shows the main parts of a generator, which can be used for generat- ing electric energy.
  • the generator can be driven for example by a piston en gine.
  • the rated power of the generator is at least 5 MW, for instance in the range of 5 to 35 MW or in the range of 8 to 27 MW.
  • the generator comprises a rotatable rotor 1.
  • the rotor 1 can be coupled by means of a coupling to the crankshaft of a piston engine or to some other power source that provides mechanical power for rotating the rotor 1 of the generator.
  • the rotor 1 is provided with field winding (not shown) for generating a rotating magnetic field.
  • the rotor 1 could comprise armature windings of the generator.
  • a cylindrical stator 2 surrounds the rotor 1.
  • the armature windings of the generator are arranged in the stator 2.
  • the rotating magnetic field generates in the armature windings elec tric current, which can be supplied to an external circuit. It would also be pos sible to arrange the field winding in the stator 2, in which case the rotor would be provided with the armature windings.
  • the stator 2 has a first end and a second end.
  • a first end housing 3a is arranged at the first end of the stator 2 and a second end housing is arranged at the second end of the stator 2. Via the end housings 3a, 3b, the stator 2 is supported against a base frame 5.
  • each end housing 3a, 3b is provided with two sup port legs 12.
  • the support legs 12 support the end housings 3a, 3b against the base frame 5.
  • the stator 2 is supported against the base frame 5 solely via the two end housings 3a, 3b. Both the end housings 3a, 3b and the stator 2 are thus load carrying parts.
  • Each end of the rotor 1 is supported by means of a bearing 7.
  • One of the bear ings 7 is attached to the first end housing 3a and the other bearing is attached to the second end housing 3b.
  • the rotor 1 is thus supported against the base frame 5 only via the end housings 3a, 3b.
  • Each end housing 3a, 3b is provided with air inlets 8 for allowing cooling air flow through the end housing 3a, 3b in the axial direction of the generator. Cooling air can thus be intro pokerd into the generator through the end housings 3a, 3b and exit through an upper part of the generator.
  • one of the end housings 3a, 3b can function as a cooling air inlet and the other end housing 3a, 3b can function as a cooling air outlet.
  • the outer surface of the stator 2 is provided with a plurality of support beams 4.
  • the support beams 4 run in the longitudinal direction, i.e. the axial direction of the stator 2 and extend from the first end of the stator 2 to the second end.
  • the support beams 4 can be attached to the stator 2 by means of welds. In stead of welds, also bolts could be used. The use of bolts for attaching the support beams 4 to the stator 2 may reduce electrical losses of the generator.
  • the number of the support beams 4 can be for example in the range of 15 to 35.
  • the support beams 4 are preferably evenly distributed along the outer pe rimeter of the stator 2.
  • FIG. 2 shows a stator 2 with the support beams 4.
  • the stator 2 comprises a plurality of annular plates 1 1.
  • the plates 1 1 are bundled together to form a pack.
  • the support beams 4 extend at each end of the stator 2 over the pack formed by the stator plates 1 1.
  • a pressure ring 9 is arranged at each end of the stator 2.
  • the outer diameter of the pressure rings 9 is slightly larger than the outer diameter of the stator plates 1 1.
  • the support beams 4 extend over the pressure rings 9.
  • the outer perimeter of the pressure ring 9 is provided with slots 16 for accommodating the support beams 4.
  • the pressure ring 9 is attached to the support beams 4 by means of welds.
  • the stator plates 11 are kept pressed against each other.
  • threaded bars could be inserted through the stator plates 1 1 for keeping the plates 1 1 together.
  • Figure 3 shows end housings 3a, 3b that are attached to the stator 2.
  • the end housings 3a, 3b are attached to the stator 2 via the support beams 4.
  • Each end housing 3a, 3b is attached to each support beam 4 by means of a bolt 6, which protrudes into the support beam 4 in the longitudinal direction of the support beam 4.
  • the end housing 3a, 3b is provided with a flange 10, through which the bolts 6 can be inserted.
  • the flange 10 is parallel to the end surface of the stator 2.
  • a joint between the end housing 3b and a support beam 4 can be best seen in the cross-sectional view of Fig. 4.
  • the flange 10 of the end housing 3b is against the end surfaces of the support beams 4.
  • the flange 10 extends radially inwards from a cylindrical section 14 of the end housing 3a, 3b.
  • the end surfaces of each support beam 4 are provided with threaded holes 13 for the bolt joints. Because of the bolt joints, less welding is needed for the assembly of the stator 2. Also, the load path between the support beam 4 and the end housing 3b is straight, which can help to reduce vibration and fatigue problems compared to more complex structures. The construction is also simpler to manufacture.
  • Figure 5 shows an end housing 3a, 3b according to an embodiment of the in vention.
  • the end housing 3a, 3b comprises a section 15 having the shape of a truncated cone.
  • a cylindrical section 14 comprises the flange 10 that is at tached to the stator 2.
  • the conical section 15 extends outwards from the cylin drical section 14.
  • the end housing 3a, 3b tapers axially outwards from the stator 2.
  • the end housing 3a, 3b can be made as a one-piece cast.
  • the end housings 3a, 3b can be made of cast iron.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

L'invention concerne un générateur permettant la production d'énergie électrique comprenant un rotor rotatif (1), un stator cylindrique (2) comportant une première extrémité et une seconde extrémité et entourant le rotor (1), un premier logement d'extrémité (3a) se trouvant au niveau de la première extrémité du stator (2), un second logement d'extrémité (3b) se trouvant au niveau de la seconde extrémité du stator (2), et plusieurs barreaux (4) longitudinaux disposés sur la surface externe du stator (2) et fixés au stator (2). Les logements d'extrémité (3a, 3b) sont fixés aux barreaux (4) au moyen de boulons (6).
PCT/FI2017/050957 2017-12-29 2017-12-29 Générateur permettant la production d'énergie électrique Ceased WO2019129916A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI2017/050957 WO2019129916A1 (fr) 2017-12-29 2017-12-29 Générateur permettant la production d'énergie électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2017/050957 WO2019129916A1 (fr) 2017-12-29 2017-12-29 Générateur permettant la production d'énergie électrique

Publications (1)

Publication Number Publication Date
WO2019129916A1 true WO2019129916A1 (fr) 2019-07-04

Family

ID=60937790

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2017/050957 Ceased WO2019129916A1 (fr) 2017-12-29 2017-12-29 Générateur permettant la production d'énergie électrique

Country Status (1)

Country Link
WO (1) WO2019129916A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1771475A (en) * 1928-06-18 1930-07-29 Robbins & Myers Stator in electric motors and generators
GB366464A (en) * 1930-09-30 1932-02-01 William Harding Scott Improvements in stators for dynamo-electric machines and methods of making the same
US2393065A (en) * 1943-01-28 1946-01-15 Westinghouse Electric Corp Frameless dynamoelectric machine
US2465275A (en) * 1946-06-08 1949-03-22 Westinghouse Electric Corp Motor construction
FR2195861A1 (fr) * 1972-08-11 1974-03-08 Asea Ab
US20110266913A1 (en) * 2010-08-30 2011-11-03 General Electric Company Global Research Segmented stator assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1771475A (en) * 1928-06-18 1930-07-29 Robbins & Myers Stator in electric motors and generators
GB366464A (en) * 1930-09-30 1932-02-01 William Harding Scott Improvements in stators for dynamo-electric machines and methods of making the same
US2393065A (en) * 1943-01-28 1946-01-15 Westinghouse Electric Corp Frameless dynamoelectric machine
US2465275A (en) * 1946-06-08 1949-03-22 Westinghouse Electric Corp Motor construction
FR2195861A1 (fr) * 1972-08-11 1974-03-08 Asea Ab
US20110266913A1 (en) * 2010-08-30 2011-11-03 General Electric Company Global Research Segmented stator assembly

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