CN208904848U - A kind of nonmetallic spring washer form involute position Tensioning structure of screw auxiliary positioning taper type - Google Patents
A kind of nonmetallic spring washer form involute position Tensioning structure of screw auxiliary positioning taper type Download PDFInfo
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- CN208904848U CN208904848U CN201821497565.5U CN201821497565U CN208904848U CN 208904848 U CN208904848 U CN 208904848U CN 201821497565 U CN201821497565 U CN 201821497565U CN 208904848 U CN208904848 U CN 208904848U
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Abstract
The utility model discloses a kind of nonmetallic spring washer form involute position Tensioning structure of screw auxiliary positioning taper type, by lower laminated plank (1), the conformal pad (2) of lower layer, the conformal pad (3) in upper layer, upper laminated plank (4), the nonmetallic spring washer of taper type (5), cover board (6), bandage (7), screw (8) is constituted, the utility model can be applied to the reforming processing of non-compliant generator stator end, utilize the elastic acting force of the nonmetallic spring washer savings of taper type, binding structure is set to form tensioned state, reinforce generator stator end involute position itself overall stiffness obviously, it substantially change end elliptical vibration frequency, reach and avoids sensitive frequency range purpose, guarantee generator operational safety, constructing operation can be convenient for using screw auxiliary positioning.
Description
Technical field:
The utility model relates to a kind of nonmetallic spring washer form involute position Tensioning structures of screw auxiliary positioning taper type.
Background technique:
Full speed steam turbine generator is compact-sized, and mechanical oscillation and ventilating and cooling outstanding problem are related to the operation of generator
The intrinsic frequency of safety, stator end mode and lead has a significant impact to the safe operation of generator, and generator unit stator is being transported
It will be by ellipse 100Hz electromagnetic force, if stator end ellipse Modal frequency is equal to or connects during row
Nearly 100Hz, and when vibratory response is bigger, stator end is possible to resonate, lead to entire winding overhang worn loose,
Bar mechanical fatigue, the safe operation for causing major accident hidden danger, endangering unit.Therefore, generator design should make stator as far as possible
End entirety ellipse intrinsic frequency avoids 100Hz proper range, but current vibration analysis means can not still accurately calculate and determine
Sub- end portion vibration characteristic；And stator end assembling structure is complicated, end is conformal and Binding material is also by construction environment temperature etc.
Factor influences, and influences end intrinsic frequency by biggish uncertain factor, and stator end intrinsic frequency after completion is caused to be deposited
In biggish discreteness, so often there is the stator end vibration shape and national standard are not achieved in new design and the product of duplication of production
And Utilities Electric Co.'s relevant criterion requirement, be unable to satisfy the phenomenon that contract requirement；Once there is this problem, it is generally difficult to locate
Reason, is limited by structure and operation environment, and generator stator end binding structure cannot use metal structure, can not influence to divulge information
It is cooling, it is very harsh to the restrictive condition of binding structure design, once construction finishes, the application space of Iterim Change binding structure
It is subject to many limitations and is difficult to carry out, traditional remedial measure is little on the change of stator end vibration shape influence, can only generally change
Become the intrinsic frequency of 1-2Hz, the situation for causing end elliptical vibration frequency that cannot avoid within the scope of 95-110Hz happens occasionally；
Its reason is that postorder binding can only be attached to upper layer stator bar and lower layer's stator bar surface, cannot be formed and tighten power,
Upper layer stator bar cannot be made closely to be fixed together with lower layer stator bar, overall stiffness cannot be made obviously to be reinforced,
To which end elliptical vibration frequency cannot be made to be substantially change.
To solve this problem, domestic and international generator manufactory all successively releases improved structural measure, such as originating from Europe
" radial rigidity can tensioner again support construction ", be made of support ring, inclined wedge and insulation blanket stud and nut, pushing out ring etc., can be with
The variation that fastening force is realized by adjusting insulation blanket stud and nut achievees the purpose that change stator end elliptical vibration frequency, but
Should structure is complicated, cost is high, it is stringent to require mounting and adjusting, that there is also adjustment parts is more, insulation blanket stud and nut check are difficult,
It is easy to induce the hidden danger for loosening abrasion, using being restricted；And this scheme can be only applied to newly design, it is necessary to thoroughly change
Design structure can not be applied to remedying for existing design structure.
It takes in recent years and whole glass filament bundle reinforcing ring is set at insulation booth outer diameter, generator stator end is made to insulate
Whole coil structures globality is reinforced at box, the method for promoting generator end entirety intrinsic frequency, and patent applied for, through practicing
Verifying, according to said method construct after, stator winding end entirety intrinsic frequency have promoted about 8Hz case, effect be significantly better than with
Toward method, part substandard product has successfully been remedied；But the product excessive for frequency departure, this method are still unable to satisfy frequency
Rate change demand, after construction stator winding end entirety intrinsic frequency still fall within it is unqualified within the scope of.
If implementing to bind at stator end involute position, keep upper layer stator bar and lower layer stator bar close
Be fixed together, achieve the effect that the overall stiffness for increasing substantially the stator end to have completed, significantly change to reach
Become the purpose of stator winding end entirety intrinsic frequency；But problem is that the binding that postorder remedial measure is implemented can not shape
At the enough power of tightening, it is difficult to achieve the effect that make upper layer stator bar to be closely fixed together with lower layer stator bar, no
Overall stiffness can be made obviously to be reinforced, end elliptical vibration frequency can not be made to be substantially change.
Summary of the invention:
The utility model discloses a kind of nonmetallic spring washer form involute position Tensioning structure of screw auxiliary positioning taper type,
Using the elastic acting force of the nonmetallic spring washer savings of taper type, the binding structure formation for implementing postorder remedial measure is tightened
Power makes upper layer stator bar be closely fixed together with lower layer's stator bar, obtains itself overall stiffness of involute position
Reinforce to obvious, substantially change end elliptical vibration frequency, can effectively promote stator winding end overall stiffness, mention
Generator Stator Winding Ends entirety intrinsic frequency is risen, Generator Stator Winding Ends body vibration mode is made to meet relevant criterion
And contract requirement, guarantee generator operational safety.A kind of the technical solution of the utility model are as follows: screw auxiliary positioning taper type
Nonmetallic spring washer form involute position Tensioning structure, the structure is by lower laminated plank, the conformal pad of lower layer, the conformal pad in upper layer, upper layer
The nonmetallic spring washer of clamping plate, taper type, cover board, bandage, screw are constituted, which is mounted on turbogenerator stator winding end portion gradually
It bursts at the seams position, the conformal pad of lower layer is padded between lower laminated plank and lower layer's stator bar, between upper laminated plank and upper layer stator bar
Pad the conformal pad in upper layer, there is chamber in the upper surface of upper laminated plank, to accommodate the nonmetallic spring washer of taper type, the lower surface of cover board with
The nonmetallic spring washer contact of taper type, screw put together on upper laminated plank, the nonmetallic spring washer of taper type, cover board together, and bandage passes through
The through hole that lower layer's stator bar and upper layer stator bar are formed constitutes closed-loop, fixed to lower laminated plank, the conformal pad of lower layer, lower layer
The conformal pad of sub-line stick, interlayer, upper layer stator bar, the conformal pad in upper layer, upper laminated plank, the nonmetallic spring washer of taper type, cover board composition
Structure form binding constraint, the nonmetallic spring washer of taper type is in confined state.
Technical effect: closing is formed since bandage passes through the through hole that lower layer's stator bar and upper layer stator bar are formed
Ring, can to the conformal pad of the lower laminated plank, lower layer that successively laminate, lower layer's stator bar, the conformal pad of interlayer, upper layer stator bar,
The conformal pad in upper layer, upper laminated plank, the nonmetallic spring washer of taper type, cover board formed constraint fix, bandage using lower layer's stator bar with
The through hole that upper layer stator bar is formed forms binding closed-loop, so that after construction can carry out after stator winding assembles
Continuous operation, bandage are wound using the glass filament bundle of epoxy resin-impregnated, are convenient for across through hole, due to the nonmetallic spring washer of taper type
Keep the lower laminated plank successively laminated, lower layer conformal under the constraint fixed function of its screen resilience and bandage in confined state
The conformal pad of pad, lower layer's stator bar, interlayer, upper layer stator bar, the conformal pad in upper layer, upper laminated plank, the nonmetallic spring washer of taper type,
Cover board forms interaction force, generates lower layer's stator bar and upper layer stator bar is firmly bound effect together, make
The globality of taper type end construction based on lower layer's stator bar and upper layer stator bar is improved, overall stiffness increasing
Greatly, body vibration frequency rises；The conformal pad pad of lower layer avoids generating local connect between lower layer's stator bar and lower laminated plank
Touching causes stress to concentrate；The conformal pad pad in upper layer avoids generation localized contact from making between upper layer stator bar and upper laminated plank
It is concentrated at stress；The upper surface of upper laminated plank has chamber to accommodate the nonmetallic spring washer of taper type, avoids the nonmetallic bullet of taper type
Pad evolution, the lower surface of cover board are contacted with the nonmetallic spring washer of taper type, pressing force are generated to the nonmetallic spring washer of taper type, using lid
Plate and upper laminated plank composite structure can be convenient for constructing operation, and screw is by upper laminated plank, the nonmetallic spring washer of taper type, cover board conjunction
Together, it makes whole, avoids the nonmetallic spring washer screen resilience release of taper type in assembling process and influence operation, work as upper layer
After conformal pad, the conformal pad of lower layer, bandage curing molding, removable screw makes the nonmetallic spring washer of taper type put aside elastic force by compression
Expanding force is formed, achievees the effect that promote overall stiffness.
Detailed description of the invention:
Fig. 1 is the utility model application schematic diagram, and view section is stator end involute position.
Fig. 2 is the A-A cross-sectional view of Fig. 1.
Fig. 3 is the B direction view of Fig. 1.
Fig. 4 is stator end axial view.
Fig. 5 is using the stator end axial view after the construction of the utility model arrangement and method for construction.
Specific embodiment:
As shown in Figure 1, Figure 2, Figure 3 shows, the nonmetallic spring washer form involute position tensioner of a kind of screw auxiliary positioning taper type
Structure, the structure by lower laminated plank 1, the conformal pad 2 of lower layer, the conformal pad 3 in upper layer, upper laminated plank 4, the nonmetallic spring washer 5 of taper type,
Cover board 6, bandage 7, screw 8 are constituted, which is mounted on turbogenerator stator winding end portion involute position, lower laminated plank 1
The conformal pad 2 of lower layer is padded between lower layer stator bar 9, and it is conformal that upper layer is padded between upper laminated plank 4 and upper layer stator bar 10
There is chamber 11 in the upper surface of pad 3, upper laminated plank 4, to accommodate the nonmetallic spring washer 5 of taper type, the lower surface of cover board 6 and frustum
The nonmetallic spring washer 5 of shape contacts, and screw 8 puts together on upper laminated plank 4, the nonmetallic spring washer 5 of taper type, cover board 6 together, and bandage 7 is worn
It crosses the through hole that lower layer's stator bar 9 and upper layer stator bar 10 are formed and constitutes closed-loop, to lower laminated plank 1, the conformal pad of lower layer
2, the conformal pad 12 of lower layer's stator bar 9, interlayer, upper layer stator bar 10, the conformal pad 3 in upper layer, upper laminated plank 4, the non-gold of taper type
Belong to spring washer 5, the structure formation binding constraint that cover board 6 forms, the nonmetallic spring washer 5 of taper type is in confined state；Due to bandage 7
The through hole formed across lower layer's stator bar 9 and upper layer stator bar 10 forms closed-loop, can be to the lower layer successively laminated
Clamping plate 1, the conformal pad 2 of lower layer, lower layer's stator bar 9, the conformal pad 12 of interlayer, upper layer stator bar 10, the conformal pad 3 in upper layer, upper layer
The nonmetallic spring washer 5 of clamping plate 4, taper type, cover board 6 form constraint and fix, and bandage 7 utilizes lower layer's stator bar 9 and upper layer stator line
The through hole that stick 10 is formed forms binding closed-loop, so that construction can carry out subsequent job after stator winding assembles,
Since the nonmetallic spring washer 5 of taper type is in confined state, in the interaction that the constraint of its screen resilience tensioner and bandage 7 is fixed
Under, make the conformal pad 2 of the lower laminated plank 1 successively laminated, lower layer, lower layer's stator bar 9, the conformal pad 12 of interlayer, upper layer stator bar
10, the conformal pad 3 in upper layer, upper laminated plank 4, the nonmetallic spring washer 5 of taper type, cover board 6 form interaction force, cause lower layer's stator
Bar 9 and upper layer stator bar 10 are by the effect together with firm binding and fixing, so that lower layer's stator bar 9 and upper layer stator
The globality of taper type end construction based on bar 10 is improved, and overall stiffness increases, and body vibration frequency rises；Under
For the conformal liner of pad 2 of layer between lower layer's stator bar 9 and lower laminated plank 1, the conformal pad 2 of lower layer is the terylene of epoxy resin-impregnated
Felt, can it is conformal filling lower layer's stator bar 9 and lower laminated plank 1 between irregular gap, construction solidification after can make lower layer
Clamping plate 1 and lower layer's stator bar 9 reliably transmit pressure texture comprehensively, avoid generation localized contact that stress is caused to concentrate；Upper layer
For the conformal liner of pad 3 between upper layer stator bar 10 and upper laminated plank 4, the conformal pad 3 in upper layer is the terylene felt of epoxy resin-impregnated,
Can it is conformal filling upper layer stator bar 10 and upper laminated plank 4 between irregular gap, construction solidification after upper layer can be made to press from both sides
Plate 4 and upper layer stator bar 10 reliably transmit pressure texture comprehensively, avoid generation localized contact that stress is caused to concentrate；Upper layer folder
There is chamber 11 in the upper surface of plate 4 accommodating the nonmetallic spring washer 5 of taper type, and the nonmetallic spring washer 5 of taper type is avoided to escape, cover board
Lower surface is contacted with the nonmetallic spring washer 5 of taper type, generates pressing force to the nonmetallic spring washer of taper type 5, using upper laminated plank 4 and lid
The structure combination of plate 6 can be convenient for construction and installation, and upper laminated plank 4, the nonmetallic spring washer 5 of taper type, cover board 6 are put together on one by screw
It rises, makes whole, avoid nonmetallic 5 screen resilience of the spring washer release of taper type in assembling process and influence operation, when upper layer is suitable
After shape pad 3, the conformal pad 2 of lower layer, 7 curing molding of bandage, removable screw 8 makes the nonmetallic spring washer 5 of taper type put aside bullet by compression
Power forms expanding force, achievees the effect that promote overall stiffness；Bandage 7 is the glass filament bundle for impregnating room temperature curing epoxy, Gu
It is in soft condition before changing, the operation of through hole can be fitted through, commensurate structure size is fitted closely with by binding structure,
The closed-loop with fastening strength is formed after solidification, the nonmetallic spring washer 5 of taper type is laminated epoxy glass-cloth board material, is pressed
Power can be with deformation occurs and generates lasting elastic force, and the nonmetallic spring washer of taper type is different from the planar structure of plain washer, taper type
Frustum structure is presented similar to plate edge in nonmetallic spring washer shape, and flexible deformation is generated when being compressed, and puts aside screen resilience；Lower layer
Clamping plate 1, upper laminated plank 4, cover board 6 are also laminated epoxy glass-cloth board material, all have excellent insulation performance, not by end electromagnetism
Power influences, does not generate the stable feature of electromagnetic consumable, performance, will not bring accident potential；The screw auxiliary positioning frustum is installed
The quantity of the nonmetallic spring washer form involute position Tensioning structure of shape can determine according to required adjustment frequency data, installation number
More more, stator end overall stiffness promotes effect and is more obvious, and stator end vibration frequency rising value is higher after construction, and selection is closed
Suitable quantity can be such that stator end vibration frequency after construction rises in qualified numberical range, the screw auxiliary positioning frustum
The installation direction of the nonmetallic spring washer form involute position Tensioning structure of shape is the mother of its long axis Yu stator end frustum structure
Line direction is parallel, and the quantity of the nonmetallic spring washer 5 of taper type and bandage 7 is determined by specific structure demand, depending on stator end
The quantity of length and through hole；Fig. 4 is not using the stator end view of the utility model arrangement and method for construction construction, and Fig. 5 is to use
Stator end view after the construction of the utility model arrangement and method for construction, which shows is mounted with eight sets of screw auxiliary positioning cones altogether
The nonmetallic spring washer form involute position Tensioning structure of platform shape, using the generatrix direction installation along stator end frustum structure and
The distribution form of cloth.
Claims (1)
1. a kind of nonmetallic spring washer form involute position Tensioning structure of screw auxiliary positioning taper type, it is characterized in that: by lower layer
Clamping plate (1), the conformal pad (2) of lower layer, the conformal pad (3) in upper layer, upper laminated plank (4), the nonmetallic spring washer of taper type (5), cover board (6),
Bandage (7), screw (8) are constituted, and the nonmetallic spring washer form involute position Tensioning structure of screw auxiliary positioning taper type is mounted on
It is conformal to pad lower layer for turbogenerator stator winding end portion involute position between lower laminated plank (1) and lower layer's stator bar (9)
It pads (2), the conformal pad (3) in upper layer, the upper surface of upper laminated plank (4) is padded between upper laminated plank (4) and upper layer stator bar (10)
There are chamber (11), to accommodate the nonmetallic spring washer of taper type (5), lower surface and the nonmetallic spring washer of taper type (5) of cover board (6) are connect
Upper laminated plank (4), the nonmetallic spring washer of taper type (5), cover board (6) are fixed together conjunction by touching, screw (8), and bandage (7) passes through
The through hole that lower layer's stator bar (9) and upper layer stator bar (10) are formed constitutes closed-loop, suitable to lower laminated plank (1), lower layer
The conformal pad (12) of shape pad (2), lower layer's stator bar (9), interlayer, upper layer stator bar (10), the conformal pad (3) in upper layer, upper layer folder
The structure formation binding of plate (4), the nonmetallic spring washer of taper type (5), cover board (6) composition constrains, at the nonmetallic spring washer of taper type (5)
In confined state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821497565.5U CN208904848U (en) | 2018-09-13 | 2018-09-13 | A kind of nonmetallic spring washer form involute position Tensioning structure of screw auxiliary positioning taper type |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821497565.5U CN208904848U (en) | 2018-09-13 | 2018-09-13 | A kind of nonmetallic spring washer form involute position Tensioning structure of screw auxiliary positioning taper type |
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| Publication Number | Publication Date |
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| CN208904848U true CN208904848U (en) | 2019-05-24 |
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| CN201821497565.5U Active CN208904848U (en) | 2018-09-13 | 2018-09-13 | A kind of nonmetallic spring washer form involute position Tensioning structure of screw auxiliary positioning taper type |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968576A (en) * | 2021-04-13 | 2021-06-15 | 哈尔滨电机厂有限责任公司 | Turbine generator stator end nose end loosening treatment process method |
-
2018
- 2018-09-13 CN CN201821497565.5U patent/CN208904848U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968576A (en) * | 2021-04-13 | 2021-06-15 | 哈尔滨电机厂有限责任公司 | Turbine generator stator end nose end loosening treatment process method |
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