CN205189964U - 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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- CN205189964U CN205189964U CN201521018372.3U CN201521018372U CN205189964U CN 205189964 U CN205189964 U CN 205189964U CN 201521018372 U CN201521018372 U CN 201521018372U CN 205189964 U CN205189964 U CN 205189964U
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Abstract
The utility model provides a gangue power plant steam turbine low pressure jar bearing seal device, include: low pressure jar bearing seal cover, polylith section are the spring leaf of the sealed one -to -one setting in a plurality of the same carbon seal ring, polylith and the graphite of the bearing seal circle of the bearing seal arc block group one -tenth of I shape, the circular spring coil that is used for the fastening shaft seal, the at least cellular seal of three -section and ferrite cusp seal, the sealed block group one -tenth of polylith graphite. The utility model discloses a carbon seal ring and bearing seal circle press the circumferencial direction and is divided into a plurality of, and each homoenergetic is directly drawn back, consequently can guarantee the rotor have keep under radial swinging's the circumstances always with a steady operation, adopt a plurality of carbon seal ring's structure between bearing seal circle and the axle, effectively reduced the clearance between turbine spindle and the bearing seal device to make 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; 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; At least three sections of cellular sealing bodies, are evenly located at the medial extremity of shaft seal arc block, and the both sides of every section of cellular sealing body arrange a ferrite dentation seal respectively, and one section of cellular sealing body and a pair ferrite dentation seal form a unit jointly; Cellular sealing body and ferrite dentation seal are all set on the axle of low pressure (LP) cylinder, and and leave radial clearance between axle; The multiple identical carbon seal ring of polylith graphite grazing block composition, each carbon seal ring is between adjacent two unit; Single graphite grazing block and the shaft seal arc block one_to_one corresponding of each carbon seal ring are arranged; The relevant position of the inner side surface of shaft seal arc block offers and ring annular groove in carbon seal ring one to one; 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; 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; Adopt the structure of multiple carbon seal ring between shaft seal circle 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 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 at least three sections of cellular sealing bodies 9 on the axle 14 of low pressure (LP) cylinder, ferrite dentation seal 8 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; Spring ring 4 is set on the cylindrical of shaft seal circle 30, is positioned at outer ring annular groove 2; Cellular sealing body 9 is evenly located at the medial extremity of shaft seal arc block 3, and the both sides of every section of cellular sealing body 9 arrange a ferrite dentation seal 8, one section of cellular sealing body 9 respectively and a pair ferrite dentation seal 8 forms a unit jointly; Cellular sealing body 9 and ferrite dentation seal 8 are all set on the axle 14 of low pressure (LP) cylinder, and and leave radial clearance between axle 14; Polylith graphite grazing block 6 forms multiple identical carbon seal ring 60, and each carbon seal ring 60 is between adjacent two unit; Single graphite grazing block 6 and shaft seal arc block 3 one_to_one corresponding of each carbon seal ring 60 are arranged; The relevant position of the inner side surface of shaft seal arc block 3 offers and ring annular groove 5 in carbon seal ring 60 one to one; 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.In embodiment the section of graphite grazing block 6 be I shape semi-shaped or other can be stuck in structure in interior ring annular groove 5.
Preferably, the quantity of shaft seal arc block 3 is 4-8 block, selects integer block.More preferably, for the ease of processing, during maintenance, spare part can be used mutually, and reduce Parts Inventory, investment reduction, 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 identical, and namely each carbon seal ring 60 is divided into polylith graphite grazing block 6.
Coal gangue power generation factory turbine low pressure cylinder gland seal device in embodiment, the quantity of carbon seal ring 60 is more, and it is less that the gap between turbine shaft and gland seal device can control, and leakproofness is better.Preferably, in embodiment, the quantity of cellular sealing body is 4 sections, and the quantity of ferrite dentation seal is 8, and the quantity of carbon seal ring is 3.
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.
In embodiment, the medial extremity of every block shaft seal arc block 3, the position corresponding with the intermediate portion of every section of cellular sealing body 9, offers the drain tank 12 run through respectively, and every bar drain tank 12 is communicated with the cellular sealing body 9 be positioned at inside it.Honeycomb grid in cellular sealing body 9 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 the drain tank 12 of bottom 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 cellular sealing body 9, ferrite dentation seal 8 and graphite grazing block 6 to axle 14 is greater than it and arrives gap below axle 14.
Preferably, superposed cellular sealing body 9, radial clearance between ferrite dentation seal 8 and axle 14 are 0.55mm-0.65mm, cellular sealing body 9 in bottom, radial clearance between ferrite dentation seal 8 and axle 14 are 0.45mm-0.55mm, cellular sealing body 9 in left side, radial clearance between ferrite dentation seal 8 and axle 14 are 0.55mm-0.65mm, and the cellular sealing body 9 on right side, radial clearance between ferrite dentation seal 8 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, radial clearance between the graphite grazing block 6 and axle 14 in left side is 0.10mm-0.15mm, and the radial clearance between the graphite grazing block 6 and axle 14 on right side is 0.05mm-0.10mm.
In above-described embodiment, carbon seal ring and shaft seal circle are circumferentially divided into some parts in direction, 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, 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 is made a concession, and is also tightened together by polylith shaft seal arc block simultaneously; Adopt the structure of multiple carbon seal ring between shaft seal circle and axle, effectively reduce turbine shaft and make the gap between 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 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.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.
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);
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);
At least three sections of cellular sealing bodies (9), evenly be located at the medial extremity of described shaft seal arc block (3), the both sides of every section of described cellular sealing body (9) arrange a ferrite dentation seal (8) respectively, and one section of cellular sealing body (9) forms a unit jointly with a pair ferrite dentation seal (8); Described cellular sealing body (9) and described ferrite dentation seal (8) are all set on the axle (14) of described low pressure (LP) cylinder, and and leave radial clearance between described axle (14);
The multiple identical carbon seal ring (60) that polylith graphite grazing block (6) forms, each described carbon seal ring (60) is between adjacent two described unit; Single graphite grazing block (6) and described shaft seal arc block (3) one_to_one corresponding of each described carbon seal ring (60) are arranged; The relevant position of the inner side surface of described shaft seal arc block (3) offers and ring annular groove (5) in described carbon seal ring (60) one to one; 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);
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 4-8 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 medial extremity of shaft seal arc block (3) described in every block, the position corresponding with the intermediate portion of cellular sealing body (9) every section described, offer the drain tank (12) run through respectively, drain tank (12) described in every bar is communicated with the described cellular sealing body (9) be positioned at inside it.
5. the coal gangue power generation factory turbine low pressure cylinder gland seal device according to claim 1,2 or 4, it is characterized in that, the quantity of described cellular sealing body is 4 sections, and the quantity of described ferrite dentation seal is 8, and the quantity of described carbon seal ring (60) is 3.
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 described in radially adjoining between 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 cellular sealing body (9), described ferrite dentation seal (8) 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 cellular sealing body (9), radial clearance between described ferrite dentation seal (8) and described axle (14) is 0.55mm-0.65mm, be positioned at the described cellular sealing body (9) of bottom, radial clearance between described ferrite dentation seal (8) and described axle (14) is 0.45mm-0.55mm, be positioned at the described cellular sealing body (9) in left side, radial clearance between described ferrite dentation seal (8) and described axle (14) is 0.55mm-0.65mm, be positioned at the described cellular sealing body (9) on right side, radial clearance between described ferrite dentation seal (8) 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, the radial clearance be positioned between the described graphite grazing block (6) in left side and described axle (14) is 0.10mm-0.15mm, the radial clearance be positioned between the described graphite grazing block (6) on right side and described axle (14) is 0.05mm-0.10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521018372.3U CN205189964U (en) | 2015-12-09 | 2015-12-09 | Gangue power plant steam turbine low pressure jar bearing seal device |
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| CN201521018372.3U CN205189964U (en) | 2015-12-09 | 2015-12-09 | Gangue power plant steam turbine low pressure jar bearing seal device |
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| CN205189964U true CN205189964U (en) | 2016-04-27 |
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| CN201521018372.3U Active CN205189964U (en) | 2015-12-09 | 2015-12-09 | Gangue power plant steam turbine low pressure jar bearing seal device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106854996A (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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- 2015-12-09 CN CN201521018372.3U patent/CN205189964U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106854996A (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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