CN205189963U - Gangue power plant steam turbine low pressure jar bearing seal device - Google Patents
Gangue power plant steam turbine low pressure jar bearing seal device Download PDFInfo
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- CN205189963U CN205189963U CN201521018332.9U CN201521018332U CN205189963U CN 205189963 U CN205189963 U CN 205189963U CN 201521018332 U CN201521018332 U CN 201521018332U CN 205189963 U CN205189963 U CN 205189963U
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Abstract
The utility model provides a gangue power plant steam turbine low pressure jar bearing 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 fastening shaft seal circular spring coil and, cellular seal, outer cellular seal, interior ferrite cusp seal, outer ferrite cusp seal in low pressure jar epaxial are established to same cover, the spring snare is established on the excircle of bearing seal circle, the polylith spring leaf sets up with the airproof of the graphite piece one -to -one, between the inner wall of clamp on the airproof of the graphite piece and inner circle ring channel. The utility model discloses a carbon seal ring and bearing seal circle press the circumferencial direction and is divided into a plurality of, and the displacement that each homoenergetic followed the axle 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, and making reducing wear between sealing washer and the pivot, the air that has effectively prevented outer hourglass and the steam turbine outside of high -quality steam is to the steam turbine internal leakage.
Description
Technical field
The utility model relates to turbine shaft seal technical field, is specifically related to a kind of coal gangue power generation factory turbine low pressure cylinder gland seal device.
Background technique
At present, the shaft end seal of Steam Turbine in Fire Power Plant low pressure (LP) cylinder is generally adopt single cellular sealing body, the hardness of sealing body is greater than the hardness of low pressure (LP) cylinder axle, in order to obtain good sealing effect, generally the gap design between cellular sealing body and low pressure (LP) cylinder axle is obtained smaller, when low pressure (LP) cylinder axle generation heat expansion, the phenomenon that low pressure (LP) cylinder axle is pulled by easy generation cellular sealing body, increase both gaps, cause turbine low pressure cylinder body drain tolerance to increase, steam turbine vacuum degree is deteriorated.Turbine low pressure cylinder body drain tolerance increases easily makes back pressure in steam-turbine unit running increase, and cause steam turbine end loss to increase, turbine steam rate increases, and internal efficiency reduces; Simultaneously; the increase of steam-turbine unit back pressure; also easily cause the rising of exhaust steam pressure, exhaust temperature; reduce the Economy of steam turbine; the swollen difference generation ANOMALOUS VARIATIONS of low pressure (LP) cylinder and low pressure (LP) cylinder also will be caused time serious to deform; unit mechanical centre is changed, causes unit vibration violent, cause steam turbine disorderly closedown.In addition, when the shaft seal imprecision of steam turbine low-pressure cylinder body, when implementing the measure of gas clean-up, open large shaft seal steam pressure and steam supply flow, gland packing leakage can be caused to enter into lubricating oil system, increase the moisture content in oil, can emulsification of lubricant be caused, stickiness is bad, oil film is damaged, and can make bearing tungsten financeization, bearing shell scaling loss, unit sharp pounding, even destroys unit.
Model utility content
The utility model proposes a kind of coal gangue power generation factory turbine low pressure cylinder gland seal device, to solve existing turbine low pressure cylinder shaft seal, imprecise problem easily occurs.
The technical solution of the utility model is achieved in that
A kind of coal gangue power generation factory turbine low pressure cylinder gland seal device, comprising: low pressure (LP) cylinder shaft seal cover, its inner side surface offers outer ring annular groove; Polylith section is the shaft seal circle of the shaft seal arc block composition of I shape, and the outboard end of every block shaft seal arc block is stuck in outer ring annular groove, leaves gap between adjacent shaft seal arc block; The inner side surface centre of shaft seal arc block offers interior ring annular groove; For the coil component spring circle of fastener shaft seal, be set on the cylindrical of shaft seal circle, be positioned at outer ring annular groove; The carbon seal ring of polylith graphite grazing block composition, graphite grazing block and shaft seal arc block one_to_one corresponding are arranged; The outboard end of every block graphite grazing block is stuck in interior ring annular groove, and the medial extremity of graphite grazing block and the axle movable top of low pressure (LP) cylinder are connected together; Gap is left between adjoining graphite sealing block; The spring sheet that polylith and graphite grazing block one_to_one corresponding are arranged, between the inwall being stuck in graphite grazing block and interior ring annular groove; Circular interior cellular sealing body and outer cellular sealing body, be separately positioned on the both sides of carbon seal ring; The both sides of interior cellular sealing body arrange one to interior ferrite dentation seal; The both sides of outer cellular sealing body arrange an external ferrite dentation seal; Interior cellular sealing body, outer cellular sealing body, interior ferrite dentation seal, outer ferrite dentation seal are all set on the axle of low pressure (LP) cylinder, and and leave radial clearance between axle; Carbon seal ring, shaft seal circle, low pressure (LP) cylinder shaft seal cover are set on the axle of low pressure (LP) cylinder successively.
The beneficial effects of the utility model are as follows:
1, carbon seal ring of the present utility model and shaft seal circle are circumferentially divided into some parts in direction, every portion all can draw back 3 millimeters in footpath, highly sensitive, radial yield is done in the displacement that can follow rotating shaft closely, therefore can guarantee that rotor has when radially wobbling and keep and axle stable operation always; Radial clearance can be adjusted to former gland sealing gear and be beyond one's reach 0.05-0.10 millimeter radial clearance by shaft seal circle; Effectively prevent high-quality steam leak outside and air outside steam turbine to steam turbine internal leakage, ensure that turbine vacuum system has good vacuum performance, namely ensure that the internal efficiency of steam-turbine unit;
2, the utility model has limit function, by arranging spring ring and arrange spring sheet between shaft seal arc block and graphite grazing block between low pressure (LP) cylinder shaft seal cover and shaft seal arc block, effectively can limit the amount of feed of seal ring, make to reduce wear between seal ring and rotating shaft, and ensure forever to keep installation and operation gap between ferrite dentation seal and rotating shaft.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art 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 prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of coal gangue power generation factory turbine low pressure cylinder gland seal device in embodiment;
Fig. 2 is the partial sectional view of view shown in Fig. 1 on A-A direction.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technological scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As illustrated in fig. 1 and 2, be the structural representation of coal gangue power generation factory turbine low pressure cylinder gland seal device in embodiment.
Coal gangue power generation factory turbine low pressure cylinder gland seal device in illustrative embodiment, comprise: be set in the carbon seal ring 60 on the axle 14 of low pressure (LP) cylinder, shaft seal circle 30, low pressure (LP) cylinder shaft seal cover 1 successively, and for coil component spring circle 4 and of fastener shaft seal 30, be set in the interior cellular sealing body 9 on the axle 14 of low pressure (LP) cylinder, outer cellular sealing body 11, interior ferrite dentation seal 8, outer ferrite dentation seal 10 equally; Wherein,
The inner side surface of low pressure (LP) cylinder shaft seal cover 1 offers outer ring annular groove 2; Polylith section is that the shaft seal arc block 3 of I shape forms shaft seal circle 30, and the outboard end of every block shaft seal arc block 3 is stuck in outer ring annular groove 2, leaves gap between adjacent shaft seal arc block 3; The inner side surface centre of shaft seal arc block 3 offers interior ring annular groove 5; Spring ring 4 is set on the cylindrical of shaft seal circle 30, is positioned at outer ring annular groove 2; Polylith graphite grazing block 6 forms carbon seal ring 60, and graphite grazing block 6 and shaft seal arc block 3 one_to_one corresponding are arranged; The outboard end of every block graphite grazing block 6 is stuck in interior ring annular groove 5, and the medial extremity of graphite grazing block 6 and axle 14 movable top of low pressure (LP) cylinder are connected together; Gap is left between adjoining graphite sealing block 6; The spring sheet 7 that polylith and graphite grazing block 6 one_to_one corresponding are arranged, between the inwall being stuck in graphite grazing block 6 and interior ring annular groove 5; Circular interior cellular sealing body 9 and outer cellular sealing body 11 are separately positioned on the both sides of carbon seal ring 60; The both sides of interior cellular sealing body 9 arrange one to interior ferrite dentation seal 8; The both sides of outer cellular sealing body 11 arrange an external ferrite dentation seal 10; Interior cellular sealing body 9, outer cellular sealing body 11, interior ferrite dentation seal 8, between outer ferrite dentation seal 10 and axle 14, leave radial clearance.
Preferably, the quantity of shaft seal arc block 3 is 6-10 block, selects integer block.More preferably, for the ease of processing, the arc length of polylith shaft seal arc block 3 is identical, and namely shaft seal circle 30 is divided into polylith shaft seal arc block 3; The arc length of polylith graphite grazing block 6 is also identical, and namely carbon seal ring 60 is divided into polylith graphite grazing block 6.
Preferably, the gap between adjacent shaft seal arc block 3 is 0.40mm-0.06mm.
Preferably, the gap between adjoining graphite sealing block 6 is 0.40mm-0.06mm.
Preferably, the outside of the ferrite dentation seal 8 and outer ferrite dentation seal 10 that are positioned at outside flushes with the both sides of shaft seal circle 30.
In embodiment, the both sides of the medial extremity of every block shaft seal arc block 3 offer the interior drain tank 12 and outer drain tank 13 that run through respectively, and interior drain tank 12 is communicated with interior cellular sealing body 9, and outer drain tank 13 is communicated with outer cellular sealing body 11.Honeycomb grid in cellular sealing body (general designation of interior cellular sealing body 9 and outer cellular sealing body 11) has condensation effect to the moisture content in steam flow, due to the special construction of Honeycomb steam seal, extremely strong suction-operated can be had to the gas of certain humidity, therefore low pressure shaft seal is applied in from wet vapor erosion, and water is discharged smoothly from drain tank in bottom 12 and outer drain tank 13 and is prevented water erosion axle packing, improve the shaft seal life-span, ensure dynamic balancing, be conducive to the safe operation of steam-turbine unit.
Steam turbine is when normally running, and rotor floats, and when adjusting each section of shaft seal, the gap that ensure above interior cellular sealing body 9, outer cellular sealing body 11 and graphite grazing block 6 to axle 14 is greater than it and arrives gap below axle 14.
Preferably, superposed interior cellular sealing body 9, radial clearance between outer cellular sealing body 11 and axle 14 are 0.55mm-0.65mm, in bottom, cellular sealing body 9, radial clearance between outer cellular sealing body 11 and axle 14 are 0.40mm-0.55mm, and in the left and right sides, cellular sealing body 9, radial clearance between outer cellular sealing body 11 and axle 14 are 0.40mm-0.50mm.
Preferably, radial clearance between superposed graphite grazing block 6 and axle 14 is 0.10mm-0.15mm, radial clearance between the graphite grazing block 6 and axle 14 of bottom is 0.05mm-0.10mm, and the radial clearance between the graphite grazing block 6 and axle 14 of the left and right sides is 0.05mm-0.10mm.
In above-described embodiment, carbon seal ring 60 and shaft seal circle 30 are circumferentially divided into some parts in direction, every portion all can draw back 3 millimeters in footpath, highly sensitive, radial yield is done in the displacement that can follow rotating shaft closely, therefore can guarantee that rotor has when radially wobbling and keep and axle stable operation always; Spring ring not only plays the effect that shaft seal circle 30 is made a concession, and is also tightened together by polylith shaft seal arc block simultaneously; Radial clearance can be adjusted to former gland sealing gear and be beyond one's reach 0.05-0.10 millimeter radial clearance by shaft seal circle 30; Effectively prevent high-quality steam leak outside and air outside steam turbine to steam turbine internal leakage, ensure that turbine vacuum system has good vacuum performance, namely ensure that the internal efficiency of steam-turbine unit.The utility model has limit function, by arranging spring ring and arrange spring sheet between shaft seal arc block and graphite grazing block between low pressure (LP) cylinder shaft seal cover and shaft seal arc block, effectively can limit the amount of feed of seal ring, make to reduce wear between seal ring and rotating shaft, and ensure forever to remain on installation and operation gap between ferrite dentation seal and rotating shaft; Adopt nonmetal polynary graphite composite material with the contact segment material of axle in embodiment, there is the characteristics such as wear-resisting, oil resistant, high temperature resistant, ageing-resistant, resistance to chemical attack, and there is self-lubricating function.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a coal gangue power generation factory turbine low pressure cylinder gland seal device, is characterized in that, comprising:
Low pressure (LP) cylinder shaft seal cover (1), its inner side surface offers outer ring annular groove (2);
Polylith section is the shaft seal circle (30) that the shaft seal arc block (3) of I shape forms, the outboard end of shaft seal arc block (3) described in every block is stuck in outer ring annular groove (2), leaves gap between adjacent described shaft seal arc block (3); The inner side surface centre of described shaft seal arc block (3) offers interior ring annular groove (5);
For the coil component spring circle (4) of fastening described shaft seal circle (30), be set on the cylindrical of described shaft seal circle (30), be positioned at described outer ring annular groove (2);
The carbon seal ring (60) that polylith graphite grazing block (6) forms, described graphite grazing block (6) and described shaft seal arc block (3) one_to_one corresponding are arranged; The outboard end of graphite grazing block (6) described in every block is stuck in interior ring annular groove (5), and the medial extremity of described graphite grazing block (6) and axle (14) movable top of low pressure (LP) cylinder are connected together; Gap is left between adjacent described graphite grazing block (6);
The spring sheet (7) that polylith and described graphite grazing block (6) one_to_one corresponding are arranged, is stuck between described graphite grazing block (6) and the inwall of described interior ring annular groove (5);
Circular interior cellular sealing body (9) and outer cellular sealing body (11), be separately positioned on the both sides of described carbon seal ring (60); The both sides of described interior cellular sealing body (9) arrange one to interior ferrite dentation seal (8); The both sides of described outer cellular sealing body (11) arrange an external ferrite dentation seal (10); Described interior cellular sealing body (9), described outer cellular sealing body (11), described interior ferrite dentation seal (8), described outer ferrite dentation seal (10) are all set on the axle (14) of described low pressure (LP) cylinder, and and leave radial clearance between described axle (14);
Described carbon seal ring (60), described shaft seal circle (30), described low pressure (LP) cylinder shaft seal cover (1) are set on the axle (14) of described low pressure (LP) cylinder successively.
2. coal gangue power generation factory according to claim 1 turbine low pressure cylinder gland seal device, is characterized in that, the quantity of described shaft seal arc block (3) is 6-10 block.
3. coal gangue power generation factory according to claim 1 and 2 turbine low pressure cylinder gland seal device, is characterized in that, described in polylith, the arc length of shaft seal arc block (3) is identical, and described in polylith, the arc length of graphite grazing block (6) is identical.
4. coal gangue power generation factory according to claim 1 turbine low pressure cylinder gland seal device, it is characterized in that, the outside of the described ferrite dentation seal (8) and described outer ferrite dentation seal (10) that are positioned at outside flushes with the both sides of described shaft seal circle (30).
5. the coal gangue power generation factory turbine low pressure cylinder gland seal device according to claim 1 or 4, it is characterized in that, the both sides of the medial extremity of shaft seal arc block (3) described in every block offer the interior drain tank (12) and outer drain tank (13) that run through respectively, described interior drain tank (12) is communicated with described interior cellular sealing body (9), and described outer drain tank (13) is communicated with described outer cellular sealing body (11).
6. the coal gangue power generation factory turbine low pressure cylinder gland seal device according to claim 1 or 4, is characterized in that, the gap between adjacent described shaft seal arc block (3) is 0.40mm-0.06mm.
7. the coal gangue power generation factory turbine low pressure cylinder gland seal device according to claim 1 or 4, is characterized in that, the gap between adjacent described graphite grazing block (6) is 0.40mm-0.06mm.
8. the coal gangue power generation factory turbine low pressure cylinder gland seal device according to claim 1 or 4, it is characterized in that, described interior cellular sealing body (9), described outer cellular sealing body (11) and described graphite grazing block (6) are greater than to the gap of described axle (14) top the gap that it arrives described axle (14) below.
9. coal gangue power generation factory according to claim 8 turbine low pressure cylinder gland seal device, it is characterized in that, superposed described interior cellular sealing body (9), radial clearance between described outer cellular sealing body (11) and described axle (14) is 0.55mm-0.65mm, be positioned at the described cellular sealing body (9) of bottom, radial clearance between described outer cellular sealing body (11) and described axle (14) is 0.40mm-0.55mm, be positioned at the described cellular sealing body (9) of the left and right sides, radial clearance between described outer cellular sealing body (11) and described axle (14) is 0.40mm-0.50mm.
10. coal gangue power generation factory according to claim 8 turbine low pressure cylinder gland seal device, it is characterized in that, radial clearance between superposed described graphite grazing block (6) and described axle (14) is 0.10mm-0.15mm, the radial clearance be positioned between the described graphite grazing block (6) of bottom and described axle (14) is 0.05mm-0.10mm, and the radial clearance be positioned between the described graphite grazing block (6) of the left and right sides and described axle (14) is 0.05mm-0.10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521018332.9U CN205189963U (en) | 2015-12-09 | 2015-12-09 | Gangue power plant steam turbine low pressure jar bearing seal device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521018332.9U CN205189963U (en) | 2015-12-09 | 2015-12-09 | Gangue power plant steam turbine low pressure jar bearing seal device |
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| CN205189963U true CN205189963U (en) | 2016-04-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106854995A (en) * | 2015-12-09 | 2017-06-16 | 山西国峰煤电有限责任公司 | Coal gangue power generation factory turbine low pressure cylinder gland seal device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106854995A (en) * | 2015-12-09 | 2017-06-16 | 山西国峰煤电有限责任公司 | Coal gangue power generation factory turbine low pressure cylinder gland seal device |
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