CN208982116U - A kind of elastic sealing bands and its turbine gland seal structure - Google Patents
A kind of elastic sealing bands and its turbine gland seal structure Download PDFInfo
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- CN208982116U CN208982116U CN201821637195.0U CN201821637195U CN208982116U CN 208982116 U CN208982116 U CN 208982116U CN 201821637195 U CN201821637195 U CN 201821637195U CN 208982116 U CN208982116 U CN 208982116U
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Abstract
The utility model discloses a kind of elastic sealing bands and its turbine gland seal structures, elastic sealing bands include that at least two tooth bands and a circular arc protect tooth band, the tooth band arranges a row by gear piece and forms, the gear piece includes diaphragm seal and elastic piece, diaphragm seal and elastic piece bending are linked together, between cog gap is provided between the gear piece of arrangement, two tooth bands are stacked, the diaphragm seal and elastic piece of phase poststack are attached to circular arc shield two intersection edges surface sides of tooth band respectively, the elastic piece is made of leading portion elastic slice and back segment support chip, leading portion elastic slice connects the diaphragm seal, the width of the leading portion elastic slice is less than diaphragm seal width, two tooth bands are staggered phase poststack, the elastic piece leading portion elastic slice of two tooth bands does not overlap each other.The utility model structure is simple, sealing of the very good solution between main turbine shaft side and moving-stator blade chip level, and two tooth bands elasticity are consistent, using the elastic characteristic of the utility model diaphragm seal can accomplish that main turbine shaft completely seals.
Description
Technical field
The utility model relates to steam turbines, gas turbine field, and in particular to a kind of elastic sealing bands and its turbine vapour
Seal structure.
Background technique
Turbine is the engine for utilizing fluid impact wheel rotation and generating power.Steam turbine, gas turbine can be divided into
And the hydraulic turbine.It is the engine for being used as power generation, aviation, navigation etc. extensively.Packing is the steaming of steam turbine in turbine, gas turbine
Steam packing component, purpose are that the steam of sealing steam turbine, gas turbine, improve the utilization rate of steam.Steam turbine, combustion vapour
The main shaft steam seal component of turbine is in main shaft radial position, and seal member and the dynamic and static of main shaft touch mill in order to prevent, close
It must be designed with gap between envelope component and main shaft, gap is too big to there is the problem of steam loss increases, steam turbine, combustion steamer
The efficiency of machine just reduces.Gap is too small, is easy for causing sound friction, causes accident.In order to which the two is taken into account, to introduce vapour
Envelope.
Sealing means traditional in the art have labyrinth gland, honeycomb steam seal and brush soft tooth packing etc..Fan
The sealing principle of palace formula packing is expanded by multi-level throttle to consume steam flow energy production damping, is steamed to reach reduction
Purpose of the vapour along axial gap leakage.Since between cog is annular compartment, circumferential direction flowing greatly reduces vortex reduction of speed effect, resistance
Vapour effect is poor, and leakage rate is larger, is unable to reach required sealing effect.Meanwhile (the practical work when labyrinth clearance occurs uneven
It is difficult to avoid in work), since leakage rate is larger, the energy for generating exciting is also big, swashs to the steam flow that turbine high-pressure rotor generates
Vibration jeopardizes unit safety operation once being difficult to solve.The above sealing means without yielding or make a concession machine in impact and rub
Structure is extensive, it is easier to cause steam turbine vibration to increase, threaten to unit safety；Brush soft tooth sealing is cylinder due to brush filament
Shape multi-filament array confrontation high-voltage high-speed steam flow is easy lodging and braking effect sealing effect when washing away.
Summary of the invention
It is all to increase the resistance of steam flow around consideration planform, and then realize and prevent high steam in seal system
Leakage, but no matter which kind of structure its effect is undesirable always, if there is such a packing part, flexible function, energy
By vapour gap completely close to sealing, but the main shaft of steam turbine, gas turbine is not had an impact, will be best scheme.For this purpose,
The utility model aim is to provide a kind of elastic sealing bands and its turbine gland seal structure, and multiple tools are arranged around turbine shaft
The packing effect of steam turbine, gas turbine axis can be greatly improved in flexible sound packing band.
To achieve the goals above, the embodiment of the utility model is:
A kind of elastic sealing bands are used for turbine packing, including at least two tooth bands and a circular arc protect tooth band, the tooth
Band arranges a row by gear piece and forms, and the gear piece includes diaphragm seal and elastic piece, and diaphragm seal and elastic piece bending are linked together, and two
Bar tooth band is stacked, and the diaphragm seal and elastic piece of phase poststack are attached to circular arc shield two intersection edges surface sides of tooth band, the tooth of arrangement respectively
Between cog gap is provided between piece, between cog gap is for realizing tooth band top circle corresponding with main turbine shaft circular arc sealing surface
Arc bending, the diaphragm seal between cog gap of two tooth bands are intertwined, so that before the diaphragm seal of rear toothrow band shelters from
Toothrow is with the between cog gap between diaphragm seal, wherein the elastic piece is made of leading portion elastic slice and back segment support chip, and leading portion elastic slice connects
Connect the diaphragm seal, two tooth bands are staggered phase poststack, and the elastic piece leading portion elastic slice of two tooth bands does not overlap each other.
Scheme is further: the diaphragm seal and elastic piece are mutually perpendicular to be linked together in 90 degree of bendings, two teeth
The height that the diaphragm seal of band stretches out circular arc shield tooth band is consistent.
Scheme is further: the width of the leading portion elastic slice is less than diaphragm seal width, and two teeth are with after between gear piece
Section support chip is linked together each self-forming integral piece.
Scheme is further: first tooth in two tooth bands is linked together to be formed with the back segment support chip between gear piece
Integral piece, width of first tooth with elastic piece leading portion elastic slice are less than diaphragm seal width, and the gear piece of Article 2 tooth band is separation unit
Part, Article 2 tooth is plugged between first tooth band, two gear piece back segment support chips with the back segment support chip of gear piece, so that two
Tooth band phase poststack is a thickness of the tooth with gear piece in the thickness of elastic segment, and width of the Article 2 tooth with gear piece leading portion elastic slice
Degree is less than the width of diaphragm seal width or Article 2 tooth with gear piece leading portion elastic slice and diaphragm seal equivalent width.
Scheme is further: the elastic piece is connected to a side of diaphragm seal width, the outer side edges of the elastic piece with
A side of diaphragm seal width is concordant or the elastic piece is connected to the interlude of diaphragm seal width.
Scheme is further: the width of the elastic piece leading portion elastic slice is 2/3rds of diaphragm seal width；It is either small
In 2/3rds of diaphragm seal width.
A kind of turbine gland seal structure, including the packing torus around main turbine shaft setting, the packing torus
It is mutually butted and is formed by multiple arc-shaped labyrinth ring blocks, the aperture surface of the arc-shaped labyrinth ring block is provided with corresponding to turbine
The labyrinth ring tooth of main shaft, arc-shaped labyrinth ring block have an arc groove along labyrinth ring tooth processing sets up in labyrinth ring back of tooth vapour face
Mouthful, foregoing description elastic sealing bands, the back segment support of elastic piece described in elastic sealing bands gear piece are inserted into the circular arc notch
Piece is fixed in the fixing groove being arranged in circular arc notch, and the leading portion elastic slice of elastic piece described in gear piece hangs in circular arc notch
Sky, the diaphragm seal of elastic sealing bands gear piece close to labyrinth ring tooth, the upper end of diaphragm seal stretch out labyrinth ring tooth sealing labyrinth ring tooth with
Gap between main turbine shaft.
Scheme is further: described to set close to the diaphragm seal abutting labyrinth ring tooth that labyrinth ring tooth is elastic sealing bands gear piece
It sets；Either there are a gap settings between the diaphragm seal and labyrinth ring tooth of elastic sealing bands gear piece, when there are a gaps
When setting, pressure balance groove is provided on the labyrinth ring tooth face opposite with the diaphragm seal of band gear piece.
Scheme is further: the gear piece diaphragm seal of the tooth band favours elastic piece along main turbine shaft direction of rotation and puts down
Face setting.
Scheme is further: the slanted angle of the diaphragm seal and elastic plate plane is 5 to 20 degree.
The comparison of the utility model and the prior art its advantage is that: structure is simple, very good solution main turbine shaft side
And the sealing between moving-stator blade chip level, two tooth band elasticity are consistent, can be accomplished using the elastic characteristic of the utility model diaphragm seal
Main turbine shaft completely seals.
The utility model is described in detail with reference to the accompanying drawings and examples.
Detailed description of the invention
Fig. 1 is the utility model elastic sealing bands structural schematic diagram；
Fig. 2 the utility model one tooth band structure axis side schematic diagram；
Fig. 3 the utility model two integrated tooth bands assemble decomposition texture schematic diagram；
Relation schematic diagram between two tooth band phase poststack elastic pieces of Fig. 4 the utility model；
Fig. 5 tooth band leading portion elastic slice is connected to diaphragm seal sealed width central segment schematic diagram；
Fig. 6 tooth band leading portion elastic slice is connected to diaphragm seal sealed width a side system schematic diagram；
The diaphragm seal of Fig. 7 the utility model tooth band and the inclined relation schematic diagram of elastic plate plane；
Fig. 8 is that main turbine shaft end seals overall structure diagram；
Fig. 9 is arc-shaped labyrinth ring block schematic diagram；
Figure 10 the utility model, which suspends, is servo-actuated gland seal structure schematic diagram；
The arc-shaped labyrinth ring block elastic piece installation notch schematic diagram of Figure 11 the utility model；
Figure 12 is the servo-actuated gland seal structure schematic diagram of the utility model another kind suspension.
Specific embodiment
Embodiment 1:
A kind of elastic sealing bands are a kind of elastic sealing bands for turbine packing, as shown in Figure 1, Figure 2, Fig. 3 and Fig. 4 institute
Show, Fig. 1 illustrates that the elastic sealing bands include at least two tooth bands 1 and a circular arc shield tooth band 2.As shown in Fig. 2, described
Tooth band 1 arranges a row by gear piece 101 and forms, and the gear piece includes diaphragm seal 101-1 and elastic piece 101-2, diaphragm seal and elasticity
Piece bending is linked together, and bending can be the bending of different angle, and the shape of this and circular arc shield tooth band has relationship, can be according to not
Same elastic demand designs the shape of different circular arc shield tooth bands, as a preferred scheme, as shown in Figure 1, circular arc protects
There are two orthogonal right-angle surfaces 201 and 202 for tooth band 2.Therefore, the diaphragm seal and elastic piece are mutually perpendicular in 90 degree of bendings
The L shape being linked together, also, the height of the diaphragm seal stretching circular arc shield tooth band of two tooth bands is consistent.Gear piece 101 is thickness
It is most preferably the flexible sheet metal such as stainless steel, alloyed copper, alloy aluminum of 0.2mm or 0.5mm for 0.2mm to 1mm.
Two tooth bands are stacked, and the diaphragm seal and elastic piece of phase poststack are attached to circular arc shield two intersection edges surface sides of tooth band respectively
201 and 202, between cog gap 103 is provided between the gear piece of arrangement, between cog gap arranges for realizing multiple diaphragm seals of tooth band
Arc-shaped bending corresponding with main turbine shaft circular arc sealing surface, the diaphragm seal between cog of two tooth bands are formed on top afterwards
Gap is intertwined, the arrangement so that the diaphragm seal of rear toothrow band shelter from before between toothrow band diaphragm seal and diaphragm seal
The between cog gap of seal section, wherein the elastic piece 101-2 is made of leading portion elastic slice a and back segment support chip b, and leading portion elastic slice a connects
The diaphragm seal 101-1 is met, as shown in Figure 3 and Figure 4, two tooth bands are staggered phase poststack, the elastic piece leading portion of two tooth bands
Elastic slice does not overlap each other, and the elasticity that this structure forms two tooth bands is respectively independent, reduces two tooth bands of overlap zone
Elastic difference and be easy to generate main shaft surface the deficiency scratched, the elasticity of two tooth bands unanimously has preferably elastic packing.
Wherein: the diaphragm seal and elastic piece of phase poststack are attached to the attaching in circular arc shield two intersection edges surface sides 201 and 202 of tooth band respectively
Can be will be arranged tie point between gear piece back segment support chip b and circular arc shield tooth band, tie point can be bonding either spot welding,
It is attached to the diaphragm seal of phase poststack and elastic piece respectively on circular arc shield two intersection edges surface sides 201 and 202 of tooth band.
Realize that two tooth bands are staggered phase poststack, the elastic piece leading portion elastic slice of two tooth bands does not overlap each other, there are many
Scheme:
Fig. 2, Fig. 3 illustrate that a kind of preferred embodiment: the width of the i.e. described leading portion elastic slice a is less than the width of diaphragm seal 101-1
Degree, two teeth are linked together each self-forming integral piece with the back segment support chip between gear piece.Such connection is so that two tooth bands
Phase poststack is in the thickness that the thickness of elastic segment is two tooth bands.
As another preferred embodiment: first tooth in two tooth bands is linked as one with the back segment support chip between gear piece
The integral part of the bodily form, width of first tooth with elastic piece leading portion elastic slice are less than diaphragm seal width, and the gear piece of Article 2 tooth band
For separation unit, Article 2 tooth is plugged between first tooth band, two gear piece back segment support chips solid with the back segment support chip of gear piece
It is fixed, when being stacked first tooth band can preceding, can also rear, such connection so that two tooth band phase poststacks in elastic segment
Thickness is a thickness of the tooth with gear piece, convenient for the fixation of two gear piece back segment support chips.Also illustrate that multiple gear pieces 101 can be
It is independent, it is also possible to be linked together.And Article 2 tooth can be with the width of gear piece leading portion elastic slice is less than sealing
Piece width is also possible to width of the Article 2 tooth with gear piece leading portion elastic slice and diaphragm seal equivalent width.
In embodiment: as shown in figure 5, the elastic piece leading portion elastic slice can be a side for being connected to diaphragm seal width,
The outer side edges of the leading portion elastic slice are concordant with a side of diaphragm seal width.Or the as shown in fig. 6, elastic piece leading portion elastic slice
It is connected to the interlude of diaphragm seal width.
In embodiment: the width of the elastic piece leading portion elastic slice be diaphragm seal width 2/3rds either be less than sealing
2/3rds of piece width, preferably half.
Embodiment 2:
A kind of includes the turbine gland seal structure of elastic sealing bands described in embodiment 1, is that one kind is servo-actuated floated packing
Structure, therefore, the content in embodiment 1 should be regarded as the content in the present embodiment, as shown in figure 8, the turbine gland seal structure
Including the packing torus being arranged around main turbine shaft 3, the packing torus is mutually right by multiple arc-shaped labyrinth ring blocks 4
Composition is connect, the aperture surface of arc-shaped labyrinth ring block as described in Figure 9 is provided with the labyrinth ring tooth 401 corresponding to main turbine shaft, such as
Shown in Figure 10, arc-shaped labyrinth ring block has a circular arc notch 402 along labyrinth ring tooth processing sets up in labyrinth ring back of tooth vapour face, circle
Fixing groove 402-1 is provided in arc notch, fixing groove 401-1 is used to block the back segment support in elastic packing toothed belt gear piece
Piece, as shown in figure 11, in the circular arc notch be inserted into embodiment 1 described in elastic sealing bands, include embodiment 1 enumerate it is a variety of
Elastic sealing bands scheme, the back segment support chip b of elastic piece described in elastic sealing bands gear piece are fixed on consolidating of being arranged in notch
Determine in slot 401-1, the leading portion elastic slice a of elastic piece described in gear piece is hanging in circular arc notch 401, elastic sealing bands gear piece it is close
Mounting is servo-actuated floated packing close to foring between labyrinth ring tooth 401, with main turbine shaft 3.
It is wherein described close to there are two types of structure types:
It is one such close to as shown in Figure 10, be that the diaphragm seal of elastic sealing bands gear piece is close to labyrinth ring tooth 401 and is arranged；
Another kind is that there are a gaps to set between the diaphragm seal of elastic sealing bands gear piece and labyrinth ring tooth 401 close to as shown in figure 12
It sets, gap 1mm, it is therefore an objective to pressure difference before and after the diaphragm seal of elastic sealing bands gear piece is reduced, yielding ability is improved, for this purpose,
Pressure balance groove 401-1, pressure balance groove are provided on the labyrinth ring tooth face opposite with the diaphragm seal of band gear piece
There are two, two groove top-bottom layout settings, labyrinth ring tooth sealing labyrinth ring tooth and main turbine shaft are stretched out in the upper end of diaphragm seal
Between gap, since the leading portion elastic slice a of the elastic piece is hanging in circular arc notch 401, when the mistake of main turbine shaft rotation
Diaphragm seal is pressed onto journey, since the hanging effect of the leading portion elastic slice a of the elastic piece is formed packing torus and turbine
Floating elastic packing is servo-actuated between owner's axis, this elastic packing will not injure main turbine shaft.Elastic sealing bands include
Different structure form described in embodiment 1.
As another preferred embodiment, as shown in figure 12, just designed as described in Example 1 according to different elastic demands
The shape of different circular arc shield tooth bands, it may be assumed that two faces 201 and 202 that circular arc protects tooth band 2 are not right angles, wherein with before elastic piece
The face that section elastic slice a is in contact is the curved arch surface an of outwardly convex.Therefore, the shape of the elastic piece leading portion elastic slice a be with
Circular arc protects the curved arch surface shape that curved arch surface of the tooth with convex device matches, the elastic piece back segment support chip b of phase poststack
Swollen item 5 is assembled with being provided between fixing groove 402-1 in circular arc notch.
As another preferred embodiment, in order to improve tooth with sealing applications effect: as shown in fig. 7, the gear piece of the tooth band
Diaphragm seal favours elastic plate plane setting along main turbine shaft direction of rotation.Wherein: the diaphragm seal and elastic plate plane
Slanted angle be 5 to 20 degree.This structure can offset a part of main turbine shaft rotation to the stress of gear piece diaphragm seal.
Claims (10)
1. a kind of elastic sealing bands are used for turbine packing, including at least two tooth bands and a circular arc protect tooth band, the tooth band
A row being arranged by gear piece to form, the gear piece includes diaphragm seal and elastic piece, and diaphragm seal and elastic piece bending are linked together, and two
Tooth band is stacked, and the diaphragm seal and elastic piece of phase poststack are attached to circular arc shield two intersection edges surface sides of tooth band, the gear piece of arrangement respectively
Between be provided between cog gap, between cog gap is for realizing tooth band top circular arc corresponding with main turbine shaft circular arc sealing surface
Bending, the diaphragm seal between cog gap of two tooth bands are intertwined, so that the diaphragm seal of rear toothrow band shelters from front row
Tooth is made of with the between cog gap between diaphragm seal, the elastic piece leading portion elastic slice and back segment support chip, described in the connection of leading portion elastic slice
Diaphragm seal, which is characterized in that two tooth bands are staggered phase poststack, and the elastic piece leading portion elastic slice of two tooth bands does not overlap each other.
2. elastic sealing bands according to claim 1, which is characterized in that the diaphragm seal and elastic piece are mutually perpendicular in 90
Degree bending is linked together, and the height that the diaphragm seal of two tooth bands stretches out circular arc shield tooth band is consistent.
3. elastic sealing bands according to claim 1 or 2, which is characterized in that the width of the elastic piece leading portion elastic slice is small
In diaphragm seal width, two teeth are linked together each self-forming integral piece with the back segment support chip between gear piece.
4. elastic sealing bands according to claim 1 or 2, which is characterized in that first tooth band in two tooth bands
Back segment support chip between gear piece is linked together to form integral piece, and width of first tooth with elastic piece leading portion elastic slice is less than diaphragm seal
The gear piece of width, Article 2 tooth band is separation unit, and Article 2 tooth is plugged on first tooth band two with the back segment support chip of gear piece
Between a gear piece back segment support chip, so that two tooth band phase poststacks are a thickness of the tooth with gear piece in the thickness of elastic segment,
And width of the Article 2 tooth with gear piece leading portion elastic slice is less than the width of diaphragm seal width or Article 2 tooth with gear piece leading portion elastic slice
Degree and diaphragm seal equivalent width.
5. elastic sealing bands according to claim 1, which is characterized in that the elastic piece is connected to the one of diaphragm seal width
Side, it is wide that the outer side edges of the elastic piece elastic piece concordant or described with a side of diaphragm seal width is connected to diaphragm seal
The interlude of degree.
6. elastic sealing bands according to claim 1 or 5, which is characterized in that the width of the elastic piece leading portion elastic slice is
2/3rds of diaphragm seal width；Either it is less than 2/3rds of diaphragm seal width.
7. a kind of turbine gland seal structure, including the packing torus around main turbine shaft setting, the packing torus by
Multiple arc-shaped labyrinth ring blocks are mutually butted composition, and the aperture surface of the arc-shaped labyrinth ring block is provided with corresponding to turbine owner
The labyrinth ring tooth of axis, arc-shaped labyrinth ring block is interior to have an arc groove along labyrinth ring tooth processing sets up in labyrinth ring back of tooth vapour face
Mouthful, any elastic sealing bands in claim 1-6, elasticity described in elastic sealing bands gear piece are inserted into the circular arc notch
The back segment support chip of piece is fixed in the fixing groove being arranged in notch, and the leading portion elastic slice of elastic piece described in gear piece is in notch
Vacantly, the diaphragm seal of elastic sealing bands gear piece close to labyrinth ring tooth, stretch out labyrinth ring tooth and seal labyrinth ring tooth by the upper end of diaphragm seal
Gap between main turbine shaft.
8. turbine gland seal structure according to claim 7, which is characterized in that it is described close to labyrinth ring tooth be elastic packing
Diaphragm seal with gear piece is close to the setting of labyrinth ring tooth；Either elastic sealing bands gear piece diaphragm seal and labyrinth ring tooth between there are
One gap setting is set on the labyrinth ring tooth face opposite with the diaphragm seal of band gear piece when there are a gap setting
It is equipped with pressure balance groove.
9. turbine gland seal structure according to claim 7, which is characterized in that the gear piece diaphragm seal of the tooth band is along whirlpool
Turbine main shaft direction of rotation favours elastic plate plane setting.
10. turbine gland seal structure according to claim 9, which is characterized in that the diaphragm seal and elastic plate plane
Slanted angle is 5 to 20 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821637195.0U CN208982116U (en) | 2018-10-10 | 2018-10-10 | A kind of elastic sealing bands and its turbine gland seal structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821637195.0U CN208982116U (en) | 2018-10-10 | 2018-10-10 | A kind of elastic sealing bands and its turbine gland seal structure |
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| CN208982116U true CN208982116U (en) | 2019-06-14 |
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| CN201821637195.0U Active CN208982116U (en) | 2018-10-10 | 2018-10-10 | A kind of elastic sealing bands and its turbine gland seal structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117655961A (en) * | 2024-01-31 | 2024-03-08 | 无锡阳光精机股份有限公司 | Workpiece clamping device for electric spindle spray test |
-
2018
- 2018-10-10 CN CN201821637195.0U patent/CN208982116U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117655961A (en) * | 2024-01-31 | 2024-03-08 | 无锡阳光精机股份有限公司 | Workpiece clamping device for electric spindle spray test |
| CN117655961B (en) * | 2024-01-31 | 2024-04-05 | 无锡阳光精机股份有限公司 | Workpiece clamping device for electric spindle spray test |
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