CN109217524A - A kind of combination variation rigidity stator end supporting structure - Google Patents
A kind of combination variation rigidity stator end supporting structure Download PDFInfo
- Publication number
- CN109217524A CN109217524A CN201811319003.6A CN201811319003A CN109217524A CN 109217524 A CN109217524 A CN 109217524A CN 201811319003 A CN201811319003 A CN 201811319003A CN 109217524 A CN109217524 A CN 109217524A
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- Prior art keywords
- stator
- fan
- stator end
- ring
- connecting plate
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The present invention discloses a kind of combination variation rigidity stator end supporting structure, it is made of supporting plate, bracket tied rope, cushion block, rack connecting plate, group cyclization, fan-shaped pad, ring tied rope, the present invention is used using supporting plate, rack connecting plate, group ring structures and combinations thereof, in conjunction with cushion block, the flexible mounting and adjusting of fan-shaped mat structure, under the premise of guaranteeing that structural strength has safe enough coefficient, achieve the effect that change stator end bracket support stiffness and retaining ring rigidity, to achieve the effect that stator end overall stiffness is variable, reach the adjustable purpose of end portion vibration frequency.
Description
Technical field:
The present invention relates to a kind of combination variation rigidity stator end supporting structures.
Background technique:
Mechanical oscillation and ventilating and cooling issue concerns are to the operational safety of steam turbine generator, and stator end mode is to generator
Safe operation have a significant impact, generator unit stator in the process of running will be by ellipse 100Hz electromagnetic force, if fixed
Sub- end elliptical type Modal frequency is equal or close to 100Hz, and when vibratory response is bigger, stator end is possible to
It resonates, leads to entire winding overhang worn loose, bar mechanical fatigue, the peace for causing major accident hidden danger, endangering unit
Row for the national games；Therefore, generator design should make stator end entirety ellipse intrinsic frequency avoid 100Hz proper range as far as possible, but
Stator end assembling structure is complicated, and end is conformal and Binding material is also influenced by factors such as construction environment temperature, consolidates end
There is frequency to be influenced by biggish uncertain factor, leading to stator end intrinsic frequency after completion, there are biggish discreteness, institutes
Newly to design and the product of duplication of production the stator end vibration shape often occurs and national standard and Utilities Electric Co.'s correlation mark is not achieved
The requirement of standard is unable to satisfy the phenomenon that contract requirement；Once there is this problem, it is generally difficult to handle, by structure and uses ring
Border limitation, generator stator end binding structure cannot use metal structure, can not influence ventilating and cooling, set to binding structure
The restrictive condition of meter is very harsh, once construction finishes, the application space of Iterim Change binding structure is subject to many limitations and hardly possible
To implement, traditional remedial measure is little on the change of stator end vibration shape influence, can only generally change 1-2 hertz of intrinsic frequency
Rate, the situation for causing end elliptical vibration frequency that cannot avoid in 95-110 hertz of ranges happen occasionally；To solve this problem, state
Inside and outside generator manufactory all successively releases improved structural measure, such as originating from Europe " radial rigidity can tensioner again branch
Support structure " is made of support ring, inclined wedge and insulation blanket stud and nut, support ring etc., can be by adjusting insulation blanket stud and nut
The variation for realizing fastening force, achievees the purpose that change stator end elliptical vibration frequency, but should structure is complicated, cost is high, to peace
Dress adjustment requirement is stringent, and more, insulation blanket stud and nut check difficulty that there is also adjustment parts is easy to induce the hidden of loosening abrasion
Suffer from, using being restricted；
Stator end bracket is generator stator end structure important component, and a certain number of stator end brackets are by stator
End construction is reliably fixed on End zone of stator core, bears the weight and electromagnetic force of stator end, stator bar is avoided to hold
By excessive electromagnetic force and mechanical vibration force, guarantee that insulation is intact；Stator end bracket is usually to use epoxy glass cloth
The triangle plate structure of pressing plate manufacture, bevel edge is parallel with stator bar end formation frustum, and ties up with stator end retaining ring
It pricks and fixes, the right-angle side in plumb position is fixed with End zone of stator core, to reach that stator end structure is reliably solid
It is scheduled on the purpose of End zone of stator core；
Stator end elliptical vibration frequency depends on the weight and the rigidity of structure of stator end, since stator end bracket is oblique
Side and stator end retaining ring use binding and fixing, and the right-angle side in plumb position is fixed with End zone of stator core, and stator iron
The rigidity of the heart is higher, so the rigidity of stator end bracket also influences the rigidity of structure of stator end, changes stator end branch
The rigidity of frame can change the effect of the rigidity of structure of stator end, it can change stator end elliptical vibration frequency；
The rigidity of stator retaining ring is also the important determinant of stator end elliptical vibration frequency, i.e., change stator retaining ring is rigid
Degree is also that can change stator end elliptical vibration frequency, and the rigidity of stator retaining ring depends on the section inertia of stator retaining ring
Square, the more big then rigidity of cross sectional moment of inertia are bigger；The stator end bracket of conventional art be rigidity can not structure changes, if change stator
Although the binding structure intensity of end frame and stator end retaining ring can achieve the purpose for changing joint stiffness, it is fixed to reach change
The purpose of sub- end elliptical vibration frequency, but structural strength safety coefficient deficiency problem can be brought, it is not enough to resist improper work
The abnormal electric power for making state, brings accident potential；The cross sectional moment of inertia of the stator retaining ring of previous structure is also unalterable.
Summary of the invention: the present invention discloses a kind of combination variation rigidity stator end supporting structure, has unlike previous technologies
Structure type, used using special stator end structure and combinations thereof, in conjunction with tied rope, the flexible mounting and adjusting of cushion block structure,
Under the premise of guaranteeing that structural strength has safe enough coefficient, reach the effect for changing stator end stiffness of support and retaining ring rigidity
Fruit reaches the adjustable purpose of end portion vibration frequency, determines generator to achieve the effect that stator end overall stiffness is variable
Sub- winding overhang body vibration mode meets relevant criterion and contract requirement, guarantees generator operational safety；Skill of the invention
Art scheme are as follows: a kind of combination variation rigidity stator end supporting structure, by supporting plate (1), bracket tied rope (2), cushion block (3), bracket
Connecting plate (4), group cyclization (5), fan-shaped pad (6), ring tied rope (7) composition, supporting plate (1) are parallel to the groove on retaining ring installation side
(8), it arranges through hole (9) along groove (8), rack connecting plate (4) is epoxy resin bonded fiber material, it is fixed on supporting plate (1),
Rack connecting plate (4) and groove (8) form gap (10), and cushion block (3) is packed in gap (10), and bracket tied rope (2) is passed through and passed through
Cushion block (3) is fixed in gap (10) by through-hole (9)；Group cyclization (5) has fan groove (11), and fan groove (11) will organize cyclization (5)
It is divided into inner ring (12) and outer ring (13), the quantity of fan groove (11) is identical as the quantity of supporting plate (1), inner ring (12) and stator
Winding binding and fixing, outer ring (13) and rack connecting plate (4) binding and fixing, sector pad (6) are filled in fan groove (11), and ring is tied up
(7) winding sector of restricting pads the inner ring (12) and outer ring (13) of (6) position.
Technical effect:
Since rack connecting plate is fixed on supporting plate, gap is formed with groove, foring can fix with stator retaining ring
Required binding structure can make rack connecting plate and stator retaining ring form the taper frame being adapted with stator bar,
Meet the fixed required structure stiffness of stator winding end, support stator winding and structural member resist abnormal operating state
Abnormal electric power and avoid generate vibration abrasion induce loosen the problems such as；Since rack connecting plate has elasticity, so that bracket
The taper being adapted with stator bar that plate is in the right-angle side position of plumb position and rack connecting plate and stator retaining ring are formed
It is resilient support between frame, so that end frame and stator end structure are formed and flexibly supported；If with cushion block to supporting plate
The gap formed with groove is filled, and carries out binding reinforcing with tied rope, then end frame plate forms stator end structure
Support stiffness can increase, support stiffness can increase along with the increase of cushion block filling quantity, to reach stator terminal
The variable effect of portion's overall stiffness, reaches the adjustable purpose of end portion vibration frequency；Installation number by changing cushion block reaches
Stator end body vibration elliptical frequency is set to avoid unqualified range；Since a group cyclization has fan groove, fan groove will organize cyclization point
It is segmented into inner ring and outer ring, the cross sectional moment of inertia for the method change group cyclization that can be filled in fan groove with fan-shaped pad changes
The rigidity of change group cyclization reaches the adjustable mesh of end portion vibration frequency to achieve the effect that stator end overall stiffness is variable
's；And due to inner ring and stator winding binding and fixing, outer ring and rack connecting plate binding and fixing, so that between inner ring and outer ring
Elastic construction also influences the joint stiffness between stator end and supporting plate, can be further by installing or removing fan-shaped pad
Adjust influence of the supporting plate to the practical body vibration elliptical frequency of stator end；The present invention utilizes supporting plate, rack connecting plate, group
Ring structures and combinations thereof use, and in conjunction with cushion block, the flexible mounting and adjusting of fan-shaped mat structure, are guaranteeing structural strength with peace enough
Under the premise of overall coefficient, achieve the effect that change stator end bracket support stiffness and retaining ring rigidity, to reach stator end
The variable effect of overall stiffness, reaches the adjustable purpose of end portion vibration frequency, makes Generator Stator Winding Ends body vibration
Mode meets relevant criterion and contract requirement, guarantees generator operational safety.
Detailed description of the invention:
Fig. 1 is application schematic diagram of the present invention.
Fig. 2 is the A-A cross-sectional view of Fig. 1.
Fig. 3 is the partial enlarged view of Fig. 2.
Specific embodiment: as shown in Figure 1, Figure 2, Figure 3 shows, a kind of combination variation rigidity stator end supporting structure is applied
In the stator end structure of three retaining rings, that is, three group cyclizations 5 are used, the structure is by supporting plate 1, bracket tied rope 2, cushion block 3, branch
Frame connecting plate 4, group cyclization 5, fan-shaped pad 6, ring tied rope 7 form, and supporting plate 1 is parallel to the groove 8 on retaining ring installation side, along groove
8 arrangement through holes 9, rack connecting plate 4 is epoxy resin bonded fiber material, is fixed on supporting plate 1, rack connecting plate 4 and groove 8
Gap 10 is formed, cushion block 3 is packed in gap 10, and bracket tied rope 2 passes through through hole 9 and cushion block 3 is fixed in gap 10；Stator
Cushion block 3 is not installed first when end is constructed, if end is padded there is no the body vibration elliptical frequency in 95-110 hertz of ranges
Block 3 does not need to install, if it is present installation cushion block 3, and with 2 binding and fixing of bracket tied rope；Group cyclization 5 has fan groove 11, fans
Group cyclization 5 is divided into inner ring 12 and outer ring 13 by shape slot 11, and the quantity of fan groove 11 is identical as the quantity of supporting plate 1, inner ring 12
With stator winding binding and fixing, outer ring 13 and 4 binding and fixing of rack connecting plate, fan-shaped pad 6 are filled in fan groove 11, ring tied rope
The inner ring 12 and outer ring 13 of 6 positions of the fan-shaped pad of 7 winding, sector pad 6 is not installed first when stator end is constructed, if end is not
There are the body vibration elliptical frequencies in 95-110 hertz of ranges, then fan-shaped pad 6 does not need to install, if it is present installation fan
Shape pad 6, and with 7 binding and fixing of ring tied rope；Increase using the installation number of cushion block 3 and fan-shaped pad 6 keeps end body vibration ellipse
Circular frequency improves, and is allowed to avoid 95-110 hertz of ranges；
Since rack connecting plate is fixed on supporting plate, gap is formed with groove, foring can fix with stator retaining ring
Required binding structure can make rack connecting plate and stator retaining ring form the taper frame being adapted with stator bar,
Meet the fixed required structure stiffness of stator winding end, support stator winding and structural member resist abnormal operating state
Abnormal electric power and avoid generate vibration abrasion induce loosen the problems such as；Since rack connecting plate has elasticity, so that bracket
The taper being adapted with stator bar that plate is in the right-angle side position of plumb position and rack connecting plate and stator retaining ring are formed
It is resilient support between frame, so that end frame and stator end structure are formed and flexibly supported；If with cushion block to supporting plate
The gap formed with groove is filled, and carries out binding reinforcing with tied rope, then end frame plate forms stator end structure
Support stiffness can increase, support stiffness can increase along with the increase of cushion block filling quantity, to reach stator terminal
The variable effect of portion's overall stiffness, reaches the adjustable purpose of end portion vibration frequency；Installation number by changing cushion block reaches
Stator end body vibration elliptical frequency is set to avoid unqualified range；Since a group cyclization has fan groove, fan groove will organize cyclization point
It is segmented into inner ring and outer ring, the cross sectional moment of inertia for the method change group cyclization that can be filled in fan groove with fan-shaped pad changes
The rigidity of change group cyclization reaches the adjustable mesh of end portion vibration frequency to achieve the effect that stator end overall stiffness is variable
's；And due to inner ring and stator winding binding and fixing, outer ring and rack connecting plate binding and fixing, so that between inner ring and outer ring
Elastic construction also influences the joint stiffness between stator end and supporting plate, can be further by installing or removing fan-shaped pad
Adjust influence of the supporting plate to the practical body vibration elliptical frequency of stator end；The present invention utilizes supporting plate, rack connecting plate, group
Ring structures and combinations thereof use, and in conjunction with cushion block, the flexible mounting and adjusting of fan-shaped mat structure, are guaranteeing structural strength with peace enough
Under the premise of overall coefficient, achieve the effect that change stator end bracket support stiffness and retaining ring rigidity, to reach stator end
The variable effect of overall stiffness, reaches the adjustable purpose of end portion vibration frequency, makes Generator Stator Winding Ends body vibration
Mode meets relevant criterion and contract requirement, guarantees generator operational safety；
Supporting plate 1, rack connecting plate 4, is organized cyclization 5, fan-shaped pad 6, is manufactured using epoxy resin bonded fiber cushion block 3, is had excellent
Different insulation performance and it can satisfy strength demand；Bracket tied rope 2, the dacron glass yarn rope that ring tied rope 7 is epoxy resin-impregnated,
It can satisfy required structure stiffness after solidification.
Claims (1)
1. a kind of combination variation rigidity stator end supporting structure, it is characterized in that: by supporting plate (1), bracket tied rope (2), cushion block
(3), rack connecting plate (4), group cyclization (5), fan-shaped pad (6), ring tied rope (7) composition, supporting plate (1) are parallel to retaining ring installation
The groove (8) on side is arranged through hole (9) along groove (8), and rack connecting plate (4) is epoxy resin bonded fiber material, is fixed on bracket
On plate (1), rack connecting plate (4) and groove (8) form gap (10), and cushion block (3) is packed in gap (10), bracket tied rope
(2) it passes through through hole (9) cushion block (3) is fixed in gap (10)；Group cyclization (5) has fan groove (11), and fan groove (11) will
Group cyclization (5) is divided into inner ring (12) and outer ring (13), and the quantity of fan groove (11) is identical as the quantity of supporting plate (1), inner ring
(12) with stator winding binding and fixing, outer ring (13) and rack connecting plate (4) binding and fixing, fan-shaped pad (6) are filled in fan groove
(11) in, the inner ring (12) and outer ring (13) of fan-shaped pad (6) position of ring tied rope (7) winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319003.6A CN109217524A (en) | 2018-11-07 | 2018-11-07 | A kind of combination variation rigidity stator end supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319003.6A CN109217524A (en) | 2018-11-07 | 2018-11-07 | A kind of combination variation rigidity stator end supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109217524A true CN109217524A (en) | 2019-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811319003.6A Pending CN109217524A (en) | 2018-11-07 | 2018-11-07 | A kind of combination variation rigidity stator end supporting structure |
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| CN (1) | CN109217524A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088913A (en) * | 1976-02-20 | 1978-05-09 | Prigorovsky Igor Alexandrovich | Electrical machine stator |
| US4238339A (en) * | 1978-11-27 | 1980-12-09 | Fridman Vladimir M | Arrangement for supporting stator end windings of an electric machine |
| CN1113047A (en) * | 1994-02-14 | 1995-12-06 | 西屋电气公司 | Turbine generator stator end floating winding support |
| US5729073A (en) * | 1996-10-17 | 1998-03-17 | Westinghouse Electric Corporation | Remote frequency control system for controlling the vibrational frequency of coils of a turbine generator stator |
| DE102007004449A1 (en) * | 2006-03-30 | 2007-10-04 | Alstom Technology Ltd. | Supporting device for end winding of stator of e.g. electric motor, has outer ring supported at end winding, where device is oscillation-moderately decoupled from stator end in relation to torsional vibrations in installation condition |
| JP2009050083A (en) * | 2007-08-20 | 2009-03-05 | Hitachi Ltd | Turbine generator and vibration suppressing method of winding end of stator of turbine generator |
| CN103427527A (en) * | 2013-08-29 | 2013-12-04 | 哈尔滨电机厂有限责任公司 | Fixing method of 600MW steam-turbine generator stator coil end |
| CN204947768U (en) * | 2015-09-23 | 2016-01-06 | 东方电气集团东方电机有限公司 | The radial fixed structure of generator stator end |
| EP2985887A1 (en) * | 2014-08-14 | 2016-02-17 | Alstom Technology Ltd. | A generator end winding support |
-
2018
- 2018-11-07 CN CN201811319003.6A patent/CN109217524A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088913A (en) * | 1976-02-20 | 1978-05-09 | Prigorovsky Igor Alexandrovich | Electrical machine stator |
| US4238339A (en) * | 1978-11-27 | 1980-12-09 | Fridman Vladimir M | Arrangement for supporting stator end windings of an electric machine |
| CN1113047A (en) * | 1994-02-14 | 1995-12-06 | 西屋电气公司 | Turbine generator stator end floating winding support |
| US5729073A (en) * | 1996-10-17 | 1998-03-17 | Westinghouse Electric Corporation | Remote frequency control system for controlling the vibrational frequency of coils of a turbine generator stator |
| DE102007004449A1 (en) * | 2006-03-30 | 2007-10-04 | Alstom Technology Ltd. | Supporting device for end winding of stator of e.g. electric motor, has outer ring supported at end winding, where device is oscillation-moderately decoupled from stator end in relation to torsional vibrations in installation condition |
| JP2009050083A (en) * | 2007-08-20 | 2009-03-05 | Hitachi Ltd | Turbine generator and vibration suppressing method of winding end of stator of turbine generator |
| CN103427527A (en) * | 2013-08-29 | 2013-12-04 | 哈尔滨电机厂有限责任公司 | Fixing method of 600MW steam-turbine generator stator coil end |
| EP2985887A1 (en) * | 2014-08-14 | 2016-02-17 | Alstom Technology Ltd. | A generator end winding support |
| CN204947768U (en) * | 2015-09-23 | 2016-01-06 | 东方电气集团东方电机有限公司 | The radial fixed structure of generator stator end |
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| PB01 | Publication | ||
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Application publication date: 20190115 |