CN205330738U - Power station steam turbine high pressure cylinder bearing seal device - Google Patents
Power station steam turbine high pressure cylinder bearing seal device Download PDFInfo
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- CN205330738U CN205330738U CN201620073837.3U CN201620073837U CN205330738U CN 205330738 U CN205330738 U CN 205330738U CN 201620073837 U CN201620073837 U CN 201620073837U CN 205330738 U CN205330738 U CN 205330738U
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- pressure cylinder
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Abstract
The utility model provides a power station steam turbine high pressure cylinder bearing seal device, the big problem in steam turbine high pressure cylinder bearing seal clearance is solved to the purpose, the utility model discloses a high pressure cylinder bearing seal cover, circular spring, bearing seal arc piece, pivot, boss, low sealed tooth, brush seal, spring leaf, high sealed tooth, recess, brush seal annular cavity and bearing seal ring shape cavity, high pressure cylinder bearing seal cover medial surface is opened along the circumferencial direction has bearing seal ring shape cavity, bearing seal arc piece section is the I shape, and polylith bearing seal arc block group becomes the bearing seal circle, and bearing seal arc piece outer end dress is in bearing seal ring shape cavity, offered the semicircle channel along the circumferencial direction in the outer fringe of bearing seal arc piece, circular spring the latter half is fastened in the semicircle channel, and the first half exposes between bearing seal circle and bearing seal ring shape cavity, department of medial surface central authorities at bearing seal arc piece has offered brush seal annular cavity, brush sealing washer is formed to the brush seal of polylith, and brush sealing washer outside pot head dress is in brush seal annular cavity.
Description
Technical field
This utility model relates to power station steam turbine axle encapsulation technique field, is specifically related to a kind of power station steam turbine high pressure cylinder gland seal device。
Background technology
Between the rotating shaft of power station steam turbine and cylinder body, the form of sealing and axle envelope mainly has fir profile shaft envelope, comb profile shaft envelope, brush axle envelope etc., the commonly used single comb profile shaft envelope of high pressure cylinder of current power station steam turbine, the material hardness of this shaft seal housing is more than the material hardness of high pressure cylinder rotating shaft, and coefficient of thermal expansion and contraction is different。In order to obtain good sealing effectiveness, being generally designed to smaller by the gap between interdigitated electrode structure shaft seal housing and high pressure cylinder rotating shaft, when turbine rotor crosses critical speed, rotor amplitude is relatively big, and shaft sealing gear is easy to abrasion。Along with the prolongation of unit operation time, axle envelope gap becomes larger, and causes steam loss to be gradually increased, and the heated zones length of steam countershaft also will increase, and temperature also raises to some extent, makes swollen difference also become larger；Owing to high pressure cylinder shaft seal housing and rotating shaft exist swollen difference, rotating shaft convex platform and the axle envelope high sealing tooth of block, low sealing tooth can make sealing tooth lodge because there is relative displacement, and even initiation high pressure cylinder rotating shaft is pulled, differential expansion of HP casing increases, Steam Turbine machine center changes, axle shakes the problems such as increase。Brush axle envelope belongs to small-gap suture axle envelope category, require the rotating shaft surface that brush filament is corresponding is carried out cure process, its axle envelope effect is better than comb profile shaft envelope, but there is also the problems such as axle envelope clearance control is difficult, brush filament firm welding is unstable, cause assemblage gap too small or rotating shaft abrasion occurs during interference, brush filament is de-falls behind in vapour system internal recycle, produces precision equipments such as valves to grind, damage, is unfavorable for the safe and stable operation of equipment。For avoiding above-mentioned safety problem, adopt the measure that radial clearance of shaft gland is tuned up when power plant is typically in overhaul of steam turbine, but paid the economic cost that high pressure cylinder shaft envelope place steam loss increases。The accidents such as additionally, when turbine high-pressure cylinder shaft seals imprecision, easily make gland packing leakage enter lubricating oil system, cause emulsification of lubricant, oil film is damaged, and even causes bearing tungsten finance, bearing shell scaling loss occur。
Utility model content
This utility model purpose is the deficiency overcoming above-mentioned prior art, it is proposed to a kind of power station steam turbine high pressure cylinder gland seal device, is difficult to control because axle seals gap and causes the problems such as big, the axle envelope imprecision in axle envelope gap solving existing turbine high-pressure cylinder shaft envelope。
This utility model one power station steam turbine high pressure cylinder gland seal device includes high pressure cylinder shaft big envelope, coil component spring, axle envelope arc block, rotating shaft, boss, low sealing tooth, brush seal body, spring leaf, bristle, high sealing tooth, groove, metal derby, brush seal body annular compartment and axle seal annular compartment。High pressure cylinder shaft big envelope is made up of upper and lower two parts, and high pressure cylinder shaft big envelope medial surface offers a circle axle seal annular compartment on along the circumferential direction；The axle envelope arc block composition one that polylith section is I shape encloses complete axle seal, and the outboard end of arc block is all sleeved in axle seal annular compartment, leaves gap between adjacent axle envelope arc block；The principle of the faying face uniform force all along the circumferential direction sealing arc block and axle big envelope according to axle in the outer rim of all axles envelope arc block in being sleeved on circle axle seal annular compartment offers a semicircle conduit, a coil component spring part for fastener shaft seal is fastened in semicircle conduit, another part is exposed between axle seal and axle seal annular compartment, and nature gap is left at its topmost and axle seal annular compartment top；The medial surface centre of all axles envelope arc block in being sleeved on circle axle seal annular compartment offers a brush seal body annular compartment；The brush seal circle that polylith brush seal body composition one circle is complete, the outboard end of these brush seal bodies is all sleeved in brush seal body annular compartment, leaves gap between adjacent brush seal, and brush seal body is arranged with axle envelope arc block one_to_one corresponding；It is provided above spring leaf, spring leaf and brush seal body one_to_one corresponding at brush seal body, is stuck between brush seal body and brush seal body annular compartment inwall；Every piece of brush seal body is made up of metal derby and bristle, bristle adopt a kind of highdensity high temperature resistant, anticorrosive, pliability is good, hardness lower than the alloy fine wire of rotating shaft hardness, bristle passes through one-piece casting technology, waters with metal derby and builds up an entirety；Certain radial clearance is left between inner side end and the rotating shaft of high pressure cylinder of brush seal body；Seal the medial extremity of arc block at every piece of axle and be positioned at the both sides of brush seal body annular compartment, the radial direction along rotating shaft offer respectively one through in mazy hydrophobic channel；It is positioned at the high sealing tooth of brush seal circle both sides and low sealing tooth, is alternately fixedly arranged on axle envelope arc block inner side end, the groove in high sealing tooth correspondence rotating shaft, the boss in low sealing tooth correspondence rotating shaft；Radial clearance is left between high sealing tooth and low sealing tooth and rotating shaft；Brush seal circle, axle seal, high pressure cylinder shaft big envelope are by inner and outer be sleeved on successively in the rotating shaft of high pressure cylinder。
As further improvement of the utility model, the quantity of axle envelope arc block and brush seal body is 6-10 block, and axle envelope arc block is used for a pair with brush seal body 1 and arranged；The arc length of all axles envelope arc block is identical, and the arc length of the metal derby of all brush seal bodies is identical。
As further improvement of the utility model, a corresponding groove of high sealing tooth, two corresponding boss of low sealing tooth；The bristle of brush seal body and a boss are corresponding, bristle adopts the alloy fine wire that a kind of highdensity high temperature resistant anti-rotten pliability is good, bristle passes through one-piece casting technology, waters with metal derby and builds up an entirety, and high sealing tooth and low sealing tooth are fir-tree type or interdigitated electrode structure。
As further improvement of the utility model, seal the medial extremity of arc block at every piece of axle and be positioned at the both sides of brush seal body annular compartment, the radial direction along rotating shaft offer respectively one through in mazy hydrophobic channel。
As further improvement of the utility model, the gap between adjacent axle envelope arc block is 0.30mm-0.70mm；The neck gap of axle envelope arc block and axle seal annular compartment is 0.30mm-0.70mm。
As further improvement of the utility model, the gap between adjacent brush seal is 0.10mm-0.30mm；Radial clearance between brush seal body and rotating shaft is 0mm-0.20mm。
High sealing tooth, low sealing tooth and brush seal body are adjusted to the radial clearance of rotating shaft when rotating shaft is in static state。In a static condition, rotating shaft is matrix due to action of gravity, and when properly functioning, rotating shaft is by along with the increase of rotating speed, and rotating shaft is straight line, and therefore under rotating shaft static conditions, high sealing tooth and low sealing tooth are bigger than lower section to the radial clearance above rotating shaft；Simultaneously because rotating shaft is high speed rotating clockwise, steam flow countershaft has active force from left to right, and therefore under static conditions, high sealing tooth and low sealing tooth should be greater than its radial clearance to rotating shaft left to the radial clearance of rotating shaft right。When rotating shaft left and right directions positions, people faces steam turbine head, and the left side of people is rotating shaft right, and the right side of people is rotating shaft left。
As further improvement of the utility model, the radial clearance between high sealing tooth and rotating shaft above rotating shaft is 0.40mm-0.70mm, the radial clearance between high sealing tooth and rotating shaft below rotating shaft is 0.30mm-0.60mm, radial clearance between high sealing tooth and the rotating shaft of rotating shaft left is 0.15mm-0.40mm, and the radial clearance between high sealing tooth and the rotating shaft of rotating shaft right is 0.20mm-0.50mm。
As further improvement of the utility model, the radial clearance between low sealing tooth and rotating shaft above rotating shaft is 0.30mm-0.60mm, the radial clearance between low sealing tooth and rotating shaft below rotating shaft is 0.25mm-0.55mm, radial clearance between low sealing tooth and the rotating shaft of rotating shaft left is 0.25mm-0.55mm, and the radial clearance between low sealing tooth and the rotating shaft of rotating shaft right is 0.30mm-0.60mm。
Brush seal circle and axle seal are along the circumferential direction divided into some parts, and every a all energy footpath draw back 3 millimeters, and highly sensitive, radial yield is done in the displacement that can follow rotating shaft closely, thus ensuring that rotating shaft has when radially wobbling is always maintained at rotating shaft stable operation。
This utility model has limit function, by arranging coil component spring between high pressure cylinder shaft big envelope and axle envelope arc block, arranging spring leaf between axle envelope arc block and brush seal body, can effectively limit the amount of feed of sealing ring, make to reduce between sealing ring and rotating shaft abrasion, and ensure to seal eternal maintenance safe operation gap between tooth and the high pressure cylinder rotating shaft of steam turbine。Brush seal body is made up of metal derby and bristle。Bristle adopt a kind of highdensity high temperature resistant, anticorrosive, pliability is good, hardness lower than the alloy fine wire of rotating shaft hardness, abrasion will not be caused by countershaft；Bristle material has the characteristics such as wear-resisting, oil resistant, high temperature resistant, ageing-resistant, resistance to chemical attack, it is possible to long-term stability plays a role；Bristle passes through one-piece casting technology, waters with metal derby and builds up an entirety, emerged in operation can be avoided to fall the phenomenon of silk；Bristle has certain inclination angle along rotor direction of rotation, can attract the radial deflection of rotor, forms closure state。Brush seal makes steam leakage occur mainly in the micro gap formed between the fine wire of dense arrangement, and the zigzag path that these gaps are formed adds the inhomogeneities that fluid flows wherein, makes fluid produce self sealss effect, thus reducing leakage。For these reasons, the radial clearance that brush axle seals can be adjusted and be beyond one's reach 0.05-0.10 millimeter to existing shaft sealing gear, effectively to prevent leaking outside of high-quality steam, improve the internal efficiency of steam turbine high-pressure cylinder, improve performance driving economy and the safety of Steam Turbine。
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings。
Fig. 1 is the static structure schematic diagram of this utility model device；
Fig. 2 is the partial sectional view in Fig. 1 along line A-A。
In figure: 1, high pressure cylinder shaft big envelope, 2, coil component spring, 3, axle envelope arc block, 4, rotating shaft, 5, boss, 6, low sealing tooth, 7, brush seal body, 8, spring leaf, 9, bristle, 10, high sealing tooth, 11, groove, 12, metal derby, 13, brush seal body annular compartment, 14, hydrophobic channel, 15, axle seal annular compartment, 16, semicircle conduit。
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments。Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection。
As illustrated in fig. 1 and 2, for the structural representation of power station steam turbine high pressure cylinder gland seal device in embodiment。
A kind of power station steam turbine high pressure cylinder gland seal device in illustrative embodiment, high pressure cylinder shaft big envelope 1 is made up of upper and lower two parts, and high pressure cylinder shaft big envelope 1 medial surface offers a circle axle seal annular compartment 15 on along the circumferential direction；The axle envelope arc block 3 that polylith section is I shape forms the axle seal that a circle is complete, is all sleeved in axle seal annular compartment 15 by the outboard end that these axles seal arc block 3, leaves gap between adjacent axle envelope arc block 3；The principle of the faying face uniform force all along the circumferential direction sealing arc block 3 and axle big envelope 1 according to axle in the outer rim of all axles envelope arc block 3 in being sleeved on axle seal annular compartment 15 offers a semicircle conduit 16, coil component spring 2 part for fastener shaft seal is fastened in semicircle conduit 16, another part is exposed between axle seal and axle seal annular compartment 15, and nature gap is left at its topmost and axle seal annular compartment 15 top；The medial surface centre of all axles envelope arc block 3 in being sleeved on axle seal annular compartment 15 offers a brush seal body annular compartment 13；Polylith brush seal body 7 forms the brush seal circle that a circle is complete, the outboard end of these brush seal bodies 7 is all sleeved in brush seal body annular compartment 13, leaving gap between adjacent brush seal 7, brush seal body 7 is arranged with axle envelope arc block 3 one_to_one corresponding；It is provided above spring leaf 8, spring leaf 8 and brush seal body 7 one_to_one corresponding at brush seal body 7, is stuck between brush seal body 7 and brush seal body annular compartment 13 inwall；Every piece of brush seal body 7 is made up of metal derby 12 and bristle 9, bristle 9 by a kind of highdensity high temperature resistant, anticorrosive, pliability is good, hardness lower than the alloy fine wire of rotating shaft hardness as bristle, bristle 9, by one-piece casting technology, waters with metal derby 12 and builds up an entirety；Certain radial clearance is left between inner side end and the rotating shaft 4 of high pressure cylinder of brush seal body 7；Seal the medial extremity of arc block 3 at every piece of axle and be positioned at the both sides of brush seal body annular compartment 13, the radial direction along rotating shaft 4 offer respectively one through in mazy hydrophobic channel 14；It is positioned at the high sealing tooth 10 of brush seal circle both sides and low sealing tooth 6, is alternately fixedly arranged on axle envelope arc block 3 inner side end, the groove 11 in the corresponding rotating shaft 4 of high sealing tooth 10, the boss 5 in the corresponding rotating shaft 4 of low sealing tooth 6；Radial clearance is left between high sealing tooth 10 and low sealing tooth 6 and rotating shaft 4；Brush seal circle, axle seal, high pressure cylinder shaft big envelope 1 are by the inner and outer rotating shaft 4 being sleeved on high pressure cylinder successively。
The quantity of axle envelope arc block 3 and brush seal body 7 is 6-10 block, and axle envelope arc block 3 is used for a pair with brush seal body 7 one and arranged；The arc length of all axles envelope arc block 3 is identical, and namely axle seal is divided into polylith axle envelope arc block 3, and the arc length of all brush seal bodies 7 is also identical, namely annular brush seal circle is divided into polylith brush seal body 7, is so easy to processing, and spare part can also be used mutually, reduce Parts Inventory, investment reduction。
Gap between adjacent axle envelope arc block 3 is 0.30mm-0.70mm；The neck gap of axle envelope arc block 3 and axle seal annular compartment 15 is 0.30mm-0.70mm。Gap between adjacent brush seal 7 is 0.10mm-0.30mm；Radial clearance between brush seal body 7 and rotating shaft 4 is 0mm-0.20mm。One corresponding groove 11 of high sealing tooth 10, two corresponding boss 5 of low sealing tooth 6, this structure can play better throttling action。One corresponding groove 11 of high sealing tooth 10 can make steam flow be changed into vertical direction upwards by horizontal direction, two corresponding boss 5 of low sealing tooth 6 can make steam flow direction change into horizontal direction again, and then by steam flow pressure initiation one blockage vapour wall, reach the effect of throttling, choked flow, flow-disturbing, form effective steam packing。The bristle 9 of brush seal body 7 is corresponding with a boss 5 in rotating shaft 4。
Medial extremity at every piece of axle envelope arc block 3 is positioned at the both sides of brush seal circle annular compartment 13, radial direction along rotating shaft 4 offer respectively one through in mazy hydrophobic channel 14, to avoid high pressure shaft seal to be subject to moist steam erosion, the globule being adsorbed on high sealing tooth 10 and low sealing tooth 6 is made to flow out along hydrophobic channel 14, prevent water erosion axle from sealing, improve the axle envelope life-span, it is ensured that dynamic balancing, be conducive to the safe operation of Steam Turbine。
High sealing tooth 10, low sealing tooth 6 and brush seal body 7 are adjusted to the radial clearance of rotating shaft 4 when rotating shaft 4 is in static state。In a static condition, rotating shaft 4 is matrix due to action of gravity, and when steam turbine is properly functioning, is float when rotor is more static, when therefore adjusting each section of axle envelope, it is ensured that high sealing tooth 10 and low sealing tooth 6 arrive the radial clearance below rotating shaft 4 to the radial clearance above rotating shaft 4 more than it；Simultaneously because steam turbine is when properly functioning, rotor is to rotate clockwise, steam flow countershaft 4 has active force from left to right, therefore to ensure under static conditions that high sealing tooth 10 and low sealing tooth 6 radial clearance to rotating shaft 4 right is more than its radial clearance to rotating shaft 4 left。
The radial clearance between high sealing tooth 10 and rotating shaft 4 above rotating shaft 4 is 0.40mm-0.70mm, the radial clearance between high sealing tooth 10 and rotating shaft 4 below rotating shaft 4 is 0.30mm-0.60mm, radial clearance between the high sealing tooth 10 and rotating shaft 4 of rotating shaft 4 left is 0.15mm-0.40mm, and the radial clearance between the high sealing tooth 10 and rotating shaft 4 of rotating shaft 4 right is 0.20mm-0.50mm。The radial clearance between low sealing tooth 6 and rotating shaft 4 above rotating shaft 4 is 0.30mm-0.60mm, the radial clearance between low sealing tooth 6 and rotating shaft 4 below rotating shaft 4 is 0.25mm-0.55mm, radial clearance between low sealing tooth 6 and the rotating shaft 4 of rotating shaft 4 left is 0.25mm-0.55mm, and the radial clearance between low sealing tooth 6 and the rotating shaft 4 of rotating shaft 4 right is 0.30mm-0.60mm。
Brush seal circle and axle seal circumferentially direction are divided into some parts, and each equal portions all can draw back 3 millimeters in footpath, and highly sensitive, radial yield is done in the displacement that can follow rotating shaft 4 closely, is always maintained at rotating shaft 4 stable operation thus ensuring that rotor has when radially wobbling；Coil component spring 2 not only acts as the effect making axle seal make a concession, and also polylith axle is sealed arc block 3 simultaneously and tightens together；The brush seal coil structures adopted between axle seal and rotating shaft 4 effectively reduces the radial clearance between rotating shaft of steam turbine 4 and gland seal device, its bristle 9 part by a kind of highdensity high temperature resistant, anticorrosive, pliability is good, hardness as bristle, will not cause abrasion by countershaft 4 lower than the alloy fine wire of rotating shaft hardness；Bristle material has the characteristics such as wear-resisting, oil resistant, ageing-resistant, resistance to chemical attack, it is possible to long-term stability plays a role；Bristle 9, by one-piece casting technology, waters with metal derby 12 and builds up an entirety, emerged in operation can be avoided to fall the phenomenon of silk；Bristle has certain inclination angle along rotor direction of rotation, can attract the radial deflection of rotor, forms closure state。Brush seal makes steam leakage occur mainly in the micro gap formed between the fine wire of dense arrangement, and the zigzag path that these gaps are formed adds the inhomogeneities that fluid flows wherein, makes fluid produce self sealss effect, thus reducing leakage。For these reasons, the radial clearance that brush axle seals can be adjusted and be beyond one's reach 0.05-0.10 millimeter to existing shaft sealing gear, effectively to prevent leaking outside of high-quality steam, improve the internal efficiency of steam turbine high-pressure cylinder, improve performance driving economy and the safety of Steam Turbine。
This device has limit function, by arranging coil component spring 2 between high pressure cylinder shaft big envelope 1 and axle envelope arc block 3, arranging spring leaf 8 between axle envelope arc block 3 and brush seal body 7, can effectively limit the amount of feed of sealing ring, make to reduce between sealing ring and rotating shaft 4 abrasion, and ensure to be permanently retained between dentation seal and rotating shaft of steam turbine 4 safe operation gap。
The foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model。
Claims (9)
1. a power station steam turbine high pressure cylinder gland seal device, is characterized in that including high pressure cylinder shaft big envelope, coil component spring, axle envelope arc block, rotating shaft, boss, low sealing tooth, brush seal body, spring leaf, high sealing tooth, groove, brush seal body annular compartment and axle seal annular compartment；High pressure cylinder shaft big envelope is made up of upper and lower two parts, and high pressure cylinder shaft big envelope medial surface offers a circle axle seal annular compartment on along the circumferential direction；Axle envelope arc block section is I shape, the axle seal that polylith axle envelope arc block composition one circle is complete, and the outboard end of axle envelope arc block is all sleeved in axle seal annular compartment, leaves gap between adjacent axle envelope arc block；The outer rim that axle seals arc block along the circumferential direction offers a semicircle conduit, coil component spring the latter half for fastener shaft seal is fastened in semicircle conduit, the first half is exposed between axle seal and axle seal annular compartment, and nature gap is left at coil component spring topmost and axle seal annular compartment top；The medial surface centre sealing arc block at axle offers a brush seal body annular compartment；The brush seal circle that polylith brush seal body composition one circle is complete, brush seal circle outboard end is sleeved in brush seal body annular compartment；Being provided above spring leaf at brush seal body, spring card is between brush seal body and brush seal body annular compartment inwall；Brush seal body includes metal derby and bristle, and bristle adopts the hardness fine wire lower than rotating shaft, and bristle is fixed on metal derby；Seal arc block medial extremity at every piece of axle and be positioned at the both sides of brush seal body annular compartment, the radial direction along rotating shaft offer respectively one through in mazy hydrophobic channel；The high sealing tooth and the low sealing tooth that are positioned at brush seal circle both sides are alternately fixedly arranged on axle envelope arc block inner side end, the groove in high sealing tooth correspondence rotating shaft, the boss in low sealing tooth correspondence rotating shaft；Brush seal circle, axle seal, high pressure cylinder shaft big envelope are by inner and outer be sleeved on successively in the rotating shaft of high pressure cylinder。
2. power station steam turbine high pressure cylinder gland seal device as claimed in claim 1, is characterized in that leaving between adjacent brush seal gap, and brush seal body is arranged with axle envelope arc block one_to_one corresponding；Spring leaf and brush seal body one_to_one corresponding。
3. power station steam turbine high pressure cylinder gland seal device as claimed in claim 1 or 2, is characterized in that leaving radial clearance between high sealing tooth and low sealing tooth and rotating shaft。
4. power station steam turbine high pressure cylinder gland seal device as claimed in claim 1 or 2, is characterized in that leaving between the inner side end of brush seal body and the rotating shaft of high pressure cylinder certain radial clearance。
5. power station steam turbine high pressure cylinder gland seal device as claimed in claim 1 or 2, is characterized in that the quantity of axle envelope arc block and brush seal body is 6-10 block；The arc length of all axles envelope arc block is identical, and the arc length of the metal derby of all brush seal bodies is identical。
6. power station steam turbine high pressure cylinder gland seal device as claimed in claim 1 or 2, is characterized in that the corresponding groove of a high sealing tooth, two corresponding boss of low sealing tooth；The bristle of brush seal body and a boss are corresponding, and high sealing tooth and low sealing tooth are fir-tree type or interdigitated electrode structure。
7. power station steam turbine high pressure cylinder gland seal device as claimed in claim 1 or 2, the gap that it is characterized in that between adjacent axle envelope arc block is 0.30mm-0.70mm；The neck gap of axle envelope arc block and axle seal annular compartment is 0.30mm-0.70mm；Gap between adjacent brush seal is 0.10mm-0.30mm；Radial clearance between brush seal body and rotating shaft is 0mm-0.20mm。
8. power station steam turbine high pressure cylinder gland seal device as claimed in claim 1 or 2, is characterized in that high sealing tooth and low sealing tooth are bigger than lower section to the radial clearance above rotating shaft under rotating shaft static conditions；High sealing tooth and low sealing tooth should be greater than its radial clearance to rotating shaft left to the radial clearance of rotating shaft right。
9. power station steam turbine high pressure cylinder gland seal device as claimed in claim 1 or 2, it is characterized in that the radial clearance between high sealing tooth and rotating shaft above rotating shaft is 0.40mm-0.70mm, the radial clearance between high sealing tooth and rotating shaft below rotating shaft is 0.30mm-0.60mm, radial clearance between high sealing tooth and the rotating shaft of rotating shaft left is 0.15mm-0.40mm, and the radial clearance between high sealing tooth and the rotating shaft of rotating shaft right is 0.20mm-0.50mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620073837.3U CN205330738U (en) | 2016-01-26 | 2016-01-26 | Power station steam turbine high pressure cylinder bearing seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620073837.3U CN205330738U (en) | 2016-01-26 | 2016-01-26 | Power station steam turbine high pressure cylinder bearing seal device |
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| Publication Number | Publication Date |
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| CN205330738U true CN205330738U (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620073837.3U Active CN205330738U (en) | 2016-01-26 | 2016-01-26 | Power station steam turbine high pressure cylinder bearing seal device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587345A (en) * | 2016-01-26 | 2016-05-18 | 山西国峰煤电有限责任公司 | High pressure cylinder shaft seal device for power station steam turbine |
| CN108931450A (en) * | 2018-05-03 | 2018-12-04 | 山西大学 | A kind of high/low temperature original position qualimeter |
-
2016
- 2016-01-26 CN CN201620073837.3U patent/CN205330738U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587345A (en) * | 2016-01-26 | 2016-05-18 | 山西国峰煤电有限责任公司 | High pressure cylinder shaft seal device for power station steam turbine |
| CN108931450A (en) * | 2018-05-03 | 2018-12-04 | 山西大学 | A kind of high/low temperature original position qualimeter |
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