CN205477768U - Gangue power plant steam turbine high pressure cylinder shaft seal device - Google Patents
Gangue power plant steam turbine high pressure cylinder shaft seal device Download PDFInfo
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- CN205477768U CN205477768U CN201620097683.1U CN201620097683U CN205477768U CN 205477768 U CN205477768 U CN 205477768U CN 201620097683 U CN201620097683 U CN 201620097683U CN 205477768 U CN205477768 U CN 205477768U
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Abstract
The utility model provides a gangue power plant steam turbine high pressure cylinder shaft seal device, include: overlap epaxial carbon seal ring, bearing seal circle, the low pressure jar bearing seal cover of establishing at the low pressure jar in proper order to and be used for the circular spring coil of fastening shaft seal, the polylith section is the bearing seal circle of the bearing seal arc block group one -tenth of I shape, and polylith graphite seals the carbon seal ring that the block group becomes, and the medial extremity of the sealed piece of graphite and an activity apical grafting of high pressure cylinder are together. The utility model discloses a carbon seal ring and bearing seal circle press the circumferencial direction and is divided into a plurality of, and 3 millimeters are directly drawn back to each homoenergetic, and sensitivity is high, and the displacement that can follow the pivot closely is done and is radially made a concession, consequently can guarantee the rotor have keep under radial swinging's the circumstances always with a steady operation, adopting carbon seal ring's structure between bearing seal circle and the axle, effectively having reduced the clearance between turbine spindle and the shaft seal device, the effectual outer hourglass that has prevented high -quality steam has been guaranteed steam turbine unit's internal efficiency to improve wholly economic nature of steam turbine promptly.
Description
Technical field
This utility model relates to turbine shaft seal technical field, is specifically related to a kind of coal gangue power generation factory steam turbine high-pressure cylinder gland seal device.
Background technology
At present, the axle periphery of Steam Turbine in Fire Power Plant high pressure cylinder is the most alternately provided with groove and boss, the commonly used single comb profile shaft envelope of its shaft end seal, the hardness of this seal is more than the hardness of high pressure cylinder, in order to obtain preferable sealing effectiveness, typically the gap between interdigitated electrode structure seal and high pressure cylinder shaft is designed to smaller, when high pressure cylinder shaft generation flatulence of heat type, is susceptible to the phenomenon that high pressure cylinder shaft is pulled by interdigitated electrode structure seal；For solving this problem; progressively increase both gaps; steam turbine high-pressure cylinder body drain tolerance is caused to increase; steam turbine high-pressure cylinder body drain tolerance increases easily makes the specific steam consumption causing steam turbine steam turbine high-pressure cylinder in steam-turbine unit running increase, and internal efficiency reduces, and reduces the economy of steam turbine; will also cause differential expansion of HP casing generation ANOMALOUS VARIATIONS time serious and high pressure cylinder deforms; make unit machine center change, cause axle to shake increase, cause steam turbine fall to exert oneself and accidental shutdown.Additionally, when turbine high-pressure cylinder shaft envelope imprecision, gland packing leakage can be caused to enter into lubricating oil system, increase the moisture in oil, can cause emulsification of lubricant, adhesiveness is bad, and oil film is destroyed, and can make bearing tungsten finance, bearing shell scaling loss, unit sharp pounding, even destroys unit.
Utility model content
The utility model proposes a kind of coal gangue power generation factory steam turbine high-pressure cylinder gland seal device, be susceptible to imprecise problem solving existing turbine high-pressure cylinder shaft envelope.
The technical solution of the utility model is achieved in that
A kind of coal gangue power generation factory steam turbine high-pressure cylinder gland seal device, including: high pressure cylinder shaft big envelope, its medial surface offers outer ring annular groove；Polylith section is the axle seal of the axle envelope arc block composition of I shape, and the outboard end of every piece of axle envelope arc block is stuck in outer ring annular groove, leaves gap between adjacent axle envelope arc block；The medial surface centre of axle envelope arc block offers interior ring annular groove；For the coil component spring circle of fastener shaft seal, it is set on the cylindrical of axle seal, is positioned at outer ring annular groove；The carbon seal ring of polylith graphite grazing block composition, graphite grazing block is arranged with axle envelope arc block one_to_one corresponding；The outboard end of every piece of graphite grazing block is stuck in interior ring annular groove, and the medial extremity of graphite grazing block is connected together with the axle movable top of high pressure cylinder；Gap is left between adjoining graphite sealing block；The spring leaf that polylith is arranged with graphite grazing block one_to_one corresponding, is stuck between the inwall of graphite grazing block and interior ring annular groove；Being positioned at the interdigitated electrode structure high sealing tooth of carbon seal ring both sides and low sealing tooth, both are alternately fixedly arranged on the side of the axle envelope adjacent rotating shaft of arc block, the groove of high sealing tooth respective shaft, the boss of low sealing tooth respective shaft；One corresponding groove of high sealing tooth, two corresponding boss of low sealing tooth；The medial extremity of graphite grazing block and a boss are corresponding；Radial clearance is left between high sealing tooth and low sealing tooth and axle；Carbon seal ring, axle seal, high pressure cylinder shaft big envelope are sequentially sleeved on the axle of high pressure cylinder.
As further improvement of the utility model, the quantity of axle envelope arc block is 6-10 block.
As further improvement of the utility model, the arc length of polylith axle envelope arc block is identical, and the arc length of polylith graphite grazing block is identical.
As further improvement of the utility model, the both sides of the medial extremity of every piece of axle envelope arc block offer a drain tank run through respectively along the radial direction of axle.
As further improvement of the utility model, the gap between adjacent axle envelope arc block is 0.30mm-0.70mm；Neck gap between axle envelope arc block and outer ring annular groove is 0.30mm-0.70mm.
As further improvement of the utility model, the gap between adjoining graphite sealing block is 0.10mm-0.30mm；Radial clearance between graphite grazing block and axle is 0mm-0.20mm；Neck gap between graphite grazing block and interior ring annular groove is 0.30mm-0.60mm.
As further improvement of the utility model, the gap above high sealing tooth, low sealing tooth and graphite grazing block to axle more than it to the gap below axle；High sealing tooth, low sealing tooth and graphite grazing block are more than its gap to axle left to the gap of axle right.
As further improvement of the utility model, the radial clearance between high sealing tooth and axle above axle is 0.40mm-0.70mm, the radial clearance between high sealing tooth and axle below axle is 0.30mm-0.60mm, radial clearance between high sealing tooth and the axle of axle left is 0.15mm-0.40mm, and the radial clearance between high sealing tooth and the axle of axle right is 0.20mm-0.50mm.
As further improvement of the utility model, the radial clearance between low sealing tooth and axle above axle is 0.30mm-0.60mm, the radial clearance between low sealing tooth and axle below axle is 0.25mm-0.55mm, radial clearance between low sealing tooth and the axle of axle left is 0.25mm-0.55mm, and the radial clearance between low sealing tooth and the axle of axle right is 0.30mm-0.60mm.
The beneficial effects of the utility model are as follows:
1, carbon seal ring of the present utility model and axle seal circumferentially direction are divided into some parts, every a all energy footpath draw back 3 millimeters, highly sensitive, radial yield is done in the displacement that can follow rotating shaft closely, thus ensuring that rotor have radially wobble in the case of be always maintained at and axle stable operation；Using the structure of carbon seal ring between axle seal and axle, effectively reduce the gap between turbine shaft and gland seal device, radial clearance can be adjusted to former gland sealing gear and be beyond one's reach 0.05-0.10 millimeter radial clearance by axle seal；This is effectively prevented leaking outside of high-quality steam, i.e. ensure that the internal efficiency of steam-turbine unit, improve steam turbine macroeconomic.
2, this utility model has limit function, by sealing to arrange between arc block at high pressure cylinder shaft big envelope and axle, between turn and axle envelope arc block and graphite grazing block, spring leaf is set, can effectively limit the amount of feeding of interdigitated electrode structure sealing ring, make to reduce between interdigitated electrode structure sealing ring and rotating shaft abrasion, and ensure that interdigitated electrode structure seals eternal holding installation and operation gap between tooth and the axle 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 describing below is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of coal gangue power generation factory steam turbine high-pressure cylinder gland seal device in embodiment；
Fig. 2 is the partial sectional view on A-A direction of the view shown in Fig. 1.
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 are obtained 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 coal gangue power generation factory steam turbine high-pressure cylinder gland seal device in embodiment.
Coal gangue power generation factory turbine low pressure cylinder gland seal device in illustrative embodiment, including: the carbon seal ring 50 that is sequentially sleeved on the axle 8 of low pressure (LP) cylinder, axle seal 30, low pressure cylinder shaft big envelope 1, and the coil component spring circle 2 for fastener shaft seal 30；Wherein,
Outer ring annular groove 10 is offered on the medial surface of low pressure cylinder shaft big envelope 1；Polylith section is that the axle envelope arc block 3 of I shape forms axle seal 30, and the outboard end of every piece of axle envelope arc block 3 is stuck in outer ring annular groove 10, leaves gap between adjacent axle envelope arc block 3；The medial surface centre of axle envelope arc block 3 offers interior ring annular groove 13；Turn 2 is set on the cylindrical of axle seal 30, is positioned at outer ring annular groove 10；Polylith graphite grazing block 5 forms carbon seal ring 50, and graphite grazing block 5 is arranged with axle envelope arc block 3 one_to_one corresponding；The outboard end of every piece of graphite grazing block 5 is stuck in interior ring annular groove 13, and the medial extremity of graphite grazing block 5 is connected together with axle 8 movable top of low pressure (LP) cylinder；Gap is left between adjoining graphite sealing block 5；The spring leaf 4 that polylith is arranged with graphite grazing block 5 one_to_one corresponding, is stuck between the inwall of graphite grazing block 5 and interior ring annular groove 13；Being positioned at the interdigitated electrode structure high sealing tooth 7 of carbon seal ring 50 both sides and low sealing tooth 6, both are alternately fixedly arranged on the side of the axle envelope adjacent rotating shaft of arc block 3, the groove 12 of high sealing tooth 7 respective shaft 8, the boss 11 of low sealing tooth 6 respective shaft 8；Radial clearance is left between high sealing tooth 7 and low sealing tooth 6 and axle 8.In embodiment the section of graphite grazing block 5 be I shape semi-shaped or other can be stuck in the structure in interior ring annular groove 13.Preferably, a corresponding groove 12 of high sealing tooth 7, two corresponding boss 11 of low sealing tooth 6.This structure can play more preferable throttling action, one high sealing tooth 7 and a groove 12, air-flow is made to be changed into vertical direction upwards by horizontal direction, two low sealing teeth 6 and a boss 11, airflow direction is made to change into horizontal direction again, and then form one vapour wall by stream pressure, form effective steam packing, reach the effect of throttling, choked flow, flow-disturbing.
Preferably, the quantity of axle envelope arc block 3 is 6-10 block, selects integer block.It is highly preferred that for the ease of processing, during maintenance, spare part can be used mutually, reducing Parts Inventory, investment reduction, the arc length of polylith axle envelope arc block 3 is identical, i.e. axle seal 30 is divided into polylith axle envelope arc block 3；The arc length of polylith graphite grazing block 5 is the most identical, i.e. carbon seal ring 50 is divided into polylith graphite grazing block 5.
Preferably, the gap between adjacent axle envelope arc block 3 is 0.30mm-0.70mm；Neck gap between axle envelope arc block 3 and outer ring annular groove 10 is 0.30mm-0.70mm.
Preferably, the gap between adjoining graphite sealing block 5 is 0.10mm-0.30mm；Radial clearance between graphite grazing block 5 and axle 8 is 0mm-0.20mm；Neck gap between graphite grazing block 5 and interior ring annular groove 13 is 0.30mm-0.60mm.
Preferably, the medial extremity of graphite grazing block 5 is corresponding with one of them boss 11 of axle 8 periphery.
In embodiment, the both sides of the medial extremity of every piece of axle envelope arc block 3 offer a drain tank run through 14 respectively along the radial direction of axle 8.In order to avoid high pressure shaft seal is by moist steam erosion, it is vertically arranged drain tank 14 at every section of high sealing tooth of axle envelope arc block 3 and the middle part of low sealing tooth, absorption is made to flow out along drain tank at the globule of high sealing tooth and low sealing tooth, prevent water erosion axle packing, improve the axle envelope life-span, ensure the safe operation of dynamic balancing, beneficially steam-turbine unit.
Steam turbine is when properly functioning, and rotor is to float, when adjusting each section of axle envelope, it is ensured that high sealing tooth and low sealing tooth and graphite grazing block 5 arrive the gap below axle 8 to the gap above axle 8 more than it；Owing to steam turbine is when properly functioning, rotor is to rotate clockwise, and the gap of axle 8 left is arrived more than it in the gap of high sealing tooth 7 to be ensured, low sealing tooth 6 and graphite grazing block 5 to axle 8 right.
Preferably, the radial clearance between high sealing tooth 7 and axle 8 above axle 8 is 0.40mm-0.70mm, the radial clearance between high sealing tooth 7 and axle 8 below axle 8 is 0.30mm-0.60mm, radial clearance between the high sealing tooth 7 and axle 8 of axle 8 left is 0.15mm-0.40mm, and the radial clearance between the high sealing tooth 7 and axle 8 of axle 8 right is 0.20mm-0.50mm.
Preferably, the radial clearance between low sealing tooth 6 and axle 8 above axle 8 is 0.30mm-0.60mm, the radial clearance between low sealing tooth 6 and axle 8 below axle 8 is 0.25mm-0.55mm, radial clearance between low sealing tooth 6 and the axle 8 of axle 8 left is 0.25mm-0.55mm, and the radial clearance between low sealing tooth 6 and the axle 8 of axle 8 right is 0.30mm-0.60mm.
In above-described embodiment, carbon seal ring and axle seal circumferentially direction are divided into some parts, each equal portions all can draw back 3 millimeters in footpath, highly sensitive, radial yield is done in the displacement that can follow rotating shaft closely, thus ensuring that rotor have radially wobble in the case of be always maintained at and axle stable operation；Turn not only acts as the effect making axle seal make a concession, and is the most also tightened together by polylith axle envelope arc block；The structure of carbon seal ring is used between axle seal and axle, effectively reduce turbine shaft and make the gap between gland seal device, carbon seal ring with axle contact portion, it it is a kind of Flexible Graphite Composites, this kind of material has the characteristics such as wear-resisting, oil resistant, high temperature resistant, ageing-resistant, resistance to chemical attack, and has self-lubricating function；Radial clearance can be adjusted to former gland sealing gear and be beyond one's reach 0.05-0.10 millimeter radial clearance by axle seal；Effectively prevent leaking outside of high-quality steam, ensure that turbine vacuum system has good vacuum performance, i.e. ensure that the internal efficiency of steam-turbine unit.This utility model has limit function, by sealing to arrange between arc block at high pressure cylinder shaft big envelope and axle, between turn and axle envelope arc block and graphite grazing block, spring leaf is set, can effectively limit the amount of feeding of sealing ring, make to reduce between sealing ring and rotating shaft abrasion, and ensure to be permanently retained between dentation seal and the axle of steam turbine installation and 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 modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (9)
1. a coal gangue power generation factory steam turbine high-pressure cylinder gland seal device, it is characterised in that including:
High pressure cylinder shaft big envelope (1), its medial surface offers outer ring annular groove (10)；
Polylith section is that the axle of I shape seals the axle seal (30) that arc block (3) forms, every piece of described axle envelope
The outboard end of arc block (3) is stuck in outer ring annular groove (10), adjacent described axle envelope arc block (3) it
Between leave gap；The medial surface centre of described axle envelope arc block (3) offers interior ring annular groove (13)；
For fastening the coil component spring circle (2) of described axle seal (30), it is set in described axle seal (30)
Cylindrical on, be positioned at described outer ring annular groove (10)；
The carbon seal ring (50) that polylith graphite grazing block (5) forms, described graphite grazing block (5) and institute
State axle envelope arc block (3) one_to_one corresponding to arrange；In the outboard end of every piece of described graphite grazing block (5) is stuck in
In ring annular groove (13), the medial extremity of described graphite grazing block (5) and axle (8) movable top of high pressure cylinder
It is connected together；Gap is left between adjacent described graphite grazing block (5)；
The spring leaf (4) that polylith is arranged with described graphite grazing block (5) one_to_one corresponding, is stuck in described graphite close
Between envelope block (5) and the inwall of described interior ring annular groove (13)；
It is positioned at interdigitated electrode structure high sealing tooth (7) and the low sealing tooth (6) of described carbon seal ring (50) both sides,
Both are alternately fixedly arranged on the side of described axle envelope arc block (3) adjacent rotating shaft, and described high sealing tooth (7) is right
Answer the groove (12) of described axle (8), the boss (11) of the described low corresponding described axle of sealing tooth (6) (8)；
Radial clearance is left between described high sealing tooth (7) and described low sealing tooth (6) and described axle (8)；One
The corresponding described groove (12) of individual described high sealing tooth (7), two described low sealing teeth (6) corresponding
Individual described boss (11)；Medial extremity and a described boss (11) of described graphite grazing block (5) are relative
Should；
Described carbon seal ring (50), described axle seal (30), described high pressure cylinder shaft big envelope (1) are overlapped successively
It is located on the axle (8) of described high pressure cylinder.
Coal gangue power generation factory the most according to claim 1 steam turbine high-pressure cylinder gland seal device, its feature exists
In, the quantity of described axle envelope arc block (3) is 6-10 block.
Coal gangue power generation factory the most according to claim 1 and 2 steam turbine high-pressure cylinder gland seal device, it is special
Levying and be, described in polylith, the arc length of axle envelope arc block (3) is identical, graphite grazing block (5) described in polylith
Arc length is identical.
Coal gangue power generation factory the most according to claim 1 steam turbine high-pressure cylinder gland seal device, its feature exists
In, the both sides of the medial extremity of every piece of described axle envelope arc block (3) are offered respectively along the radial direction of described axle (8)
There is a drain tank run through (14).
Coal gangue power generation factory the most according to claim 1 and 2 steam turbine high-pressure cylinder gland seal device, it is special
Levying and be, the gap between adjacent described axle envelope arc block (3) is 0.30mm-0.70mm；Described axle envelope arc
Neck gap between shape block (3) and described outer ring annular groove (10) is 0.30mm-0.70mm.
Coal gangue power generation factory the most according to claim 1 steam turbine high-pressure cylinder gland seal device, its feature exists
In, the gap between adjacent described graphite grazing block (5) is 0.10mm-0.30mm；Described graphite grazing block
(5) radial clearance and between described axle (8) is 0mm-0.20mm；Described graphite grazing block (5) with
Neck gap between interior ring annular groove (13) is 0.30mm-0.60mm.
Coal gangue power generation factory the most according to claim 1 steam turbine high-pressure cylinder gland seal device, its feature exists
In, described high sealing tooth (7), described low sealing tooth (6) and described graphite grazing block (5) are to described
The gap of described axle (8) lower section is arrived more than it in the gap of axle (8) top；Described high sealing tooth (7), institute
State low sealing tooth (6) and described graphite grazing block (5) gap to described axle (8) right to arrive more than it
The gap of described axle (8) left.
8., according to the coal gangue power generation factory steam turbine high-pressure cylinder gland seal device described in claim 1 or 7, it is special
Levy and be, be positioned at the radial direction between described high sealing tooth (7) and the described axle (8) of described axle (8) top
Gap is 0.40mm-0.70mm, is positioned at the described high sealing tooth (7) of described axle (8) lower section and described axle
(8) radial clearance between is 0.30mm-0.60mm, is positioned at the described high sealing of described axle (8) left
Radial clearance between tooth (7) and described axle (8) is 0.15mm-0.40mm, is positioned at described axle (8) right
Radial clearance between described high sealing tooth (7) and the described axle (8) of side is 0.20mm-0.50mm.
9., according to the coal gangue power generation factory steam turbine high-pressure cylinder gland seal device described in claim 1 or 7, it is special
Levy and be, be positioned at the radial direction between described low sealing tooth (6) and the described axle (8) of described axle (8) top
Gap is 0.30mm-0.60mm, is positioned at the described low sealing tooth (6) of described axle (8) lower section and described axle
(8) radial clearance between is 0.25mm-0.55mm, is positioned at the described low sealing of described axle (8) left
Radial clearance between tooth (6) and described axle (8) is 0.25mm-0.55mm, is positioned at described axle (8)
Radial clearance between described low sealing tooth (6) and the described axle (8) of right is 0.30mm-0.60mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620097683.1U CN205477768U (en) | 2016-02-01 | 2016-02-01 | Gangue power plant steam turbine high pressure cylinder shaft seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620097683.1U CN205477768U (en) | 2016-02-01 | 2016-02-01 | Gangue power plant steam turbine high pressure cylinder shaft seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205477768U true CN205477768U (en) | 2016-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620097683.1U Active CN205477768U (en) | 2016-02-01 | 2016-02-01 | Gangue power plant steam turbine high pressure cylinder shaft seal device |
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| CN (1) | CN205477768U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355540A (en) * | 2017-08-18 | 2017-11-17 | 国网湖南省电力公司 | Gap adaptively adjusts sealing structure |
-
2016
- 2016-02-01 CN CN201620097683.1U patent/CN205477768U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355540A (en) * | 2017-08-18 | 2017-11-17 | 国网湖南省电力公司 | Gap adaptively adjusts sealing structure |
| CN107355540B (en) * | 2017-08-18 | 2023-07-14 | 国网湖南省电力公司 | Gap self-adaptive adjusting sealing structure |
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