CN205225346U - Prevent steam turbine steam leak's bearing seal - Google Patents

Prevent steam turbine steam leak's bearing seal Download PDF

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Publication number
CN205225346U
CN205225346U CN201520505643.1U CN201520505643U CN205225346U CN 205225346 U CN205225346 U CN 205225346U CN 201520505643 U CN201520505643 U CN 201520505643U CN 205225346 U CN205225346 U CN 205225346U
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China
Prior art keywords
outer lining
turn
labyrinth ring
ring
shaft seal
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Active
Application number
CN201520505643.1U
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Chinese (zh)
Inventor
刘运智
徐新燕
冯艳东
王素伟
张伟周
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hebei national source electric Limited by Share Ltd
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Hebei Guo Yuan Power Equipment Co Ltd
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Priority to CN201520505643.1U priority Critical patent/CN205225346U/en
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Publication of CN205225346U publication Critical patent/CN205225346U/en
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Abstract

The utility model relates to a steam turbine sealing device especially relates to a prevent steam turbine steam leak's bearing seal, half -turn (2), gland ring (3) and outer lining lower branch (4) on outer lining sealing ring (1), outer lining, the upper and lower half -turn of outer lining (2), (4) are through taper bolt (7), connecting bolt (8) mechanically fastening, gland ring (3) set up at the upper and lower half -turn of outer lining (2), (4) inboard corresponding vapor seal inslot, turbine rotor passes in gland ring (3), and the sealed of shaft seal housing countercylinder steam is realized to gland ring (3) internal tooth and rotor soft seal, the sealed of the shaft seal housing outer lining outside is realized in setting up on the outer lining the corresponding seal groove in half -turn (2) outside in outer lining sealing ring (1). The utility model discloses need not additionally increase supplementary gland ring and supply the short problem of accumulative total arc length, can practice thrift manufacturing cost greatly like this.

Description

Prevent the shaft seal that steam-turbine leaks
Technical field
The utility model relates to a kind of steam turbine seal device, particularly relates to a kind of shaft seal preventing steam-turbine from leaking.
Background technique
Shaft seal, high pressure shaft seal, middle last item envelope, low pressure shaft seal, diaphragm gland etc. are that power station steam turbine commonly uses sealing configuration, with turbine rotor or gland sealing gear with the use of.
Shaft seal is mainly used in steam turbine end, its major function is when rotor passes cylinder, prevent air from entering cylinder or steam leaks from cylinder, and the gas leakage of the external gland of recyclable steam turbine, utilize its heat heating part water of condensation, also can extract the gaseous mixture of turbine steam seal system simultaneously out, prevent steam leakage in machine room or oil system.Stuffing box bearing is steam turbine parts peculiar, and power station steam turbine all can be used.
Traditional shaft seal finds in an assembling process, the length repeatedly adjusting gland blocks is needed during part labyrinth ring in assembling, to reach the requirement of assembling split gap, axle gap and Leakage prevention, even sometimes need to destroy whole circle labyrinth ring to make up fit up gap requirement in addition.So not only in the assembling of shaft seal, waste a lot of time, cause the processing cost of shaft seal to increase simultaneously, bring difficulty to production and assembling.
Model utility content
The purpose of this utility model is to provide a kind of shaft seal preventing steam-turbine from leaking, and has without the need to repeatedly adjusting gland blocks length, also without the need to the whole circle packing of ancillary damage, have easy to use, quick, efficiency is high, low cost and other advantages.
For solving the problem, technical solution adopted in the utility model is:
Prevent the shaft seal that steam-turbine leaks, comprise half-turn on outer lining seal ring, outer lining, labyrinth ring and outer lining lower branch, on described outer lining, half-turn and outer lining lower branch are interconnected by split screw, and are fixed by taper pin, connecting bolt machinery;
Described outer lining seal ring to be arranged on outer lining outside half-turn in corresponding seal groove, realizes the sealing outside shaft seal housing outer lining;
Described labyrinth ring is made up of spaced gland blocks, gland blocks is by the adjustable packing groove be fixed on outer lining inside half-turn and outer lining lower branch of cylindrical spring, realize the sealing inside shaft seal housing outer lining, the inner side that described labyrinth ring contacts with turbine rotor is provided with the soft tooth of packing, and turbine rotor passes in labyrinth ring.
Further, described labyrinth ring 3 is the two-sided angle labyrinth rings of soft tooth.
Further, after described gland blocks forms packing segmental arc, circumference is total equal with corresponding packing groove circumference overall length.
Further, the integral diameter of described labyrinth ring be former labyrinth ring seamless time diameter add and increase diameter Δ D, described increase diameter Δ D is multiplied by fracture width numerical value a for cutting off quantity n, then except obtaining in ∏.Coordinate so zero clearance between each segmental arc can be realized, coordinate with shaft seal outer lining split place labyrinth ring also can realize zero clearance and coordinate.
The beneficial effect adopting technique scheme to produce is: it is short that the utility model solves accumulative arc length in labyrinth ring assembly process, thus mid-separate surface seal is bad, causes the phenomenon of shaft-packing leakage; The labyrinth ring that diameter parameters is amplified can be assembled on outer lining in half-turn and outer lining lower branch one to one, additionally need not increase auxiliary steam seal ring and supplement and add up the short problem of arc length, can greatly save production cost like this.
Accompanying drawing explanation
Fig. 1 is structure sectional view of the present utility model.
Fig. 2 is that structure of the present utility model partly cuts open figure.
Fig. 3 is that of the present utility model looking up partly cuts open figure.
Fig. 4 is the labyrinth ring structural drawing of the utility model embodiment.
Fig. 5 is A-A partial sectional view in Fig. 4.
In figure: half-turn, 3-labyrinth ring, 4-outer lining lower branch, 5-cylindrical spring, 6-jack bolt, 7-taper pin, 8-connecting bolt on 1-outer lining seal ring, 2-outer lining.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1, Fig. 2, Fig. 3 and Fig. 4 show an embodiment of a kind of shaft seal preventing steam-turbine from leaking of the utility model: a kind of shaft seal preventing steam-turbine from leaking, comprise half-turn 2 on outer lining seal ring 1, outer lining, labyrinth ring 3 and outer lining lower branch 4, on described outer lining, half-turn 2 and outer lining lower branch 4 are interconnected by split screw, and are fixed by taper pin 7, connecting bolt 8 machinery;
Described outer lining seal ring 1 to be arranged on outer lining outside half-turn 2 in corresponding seal groove, realizes the sealing outside shaft seal housing outer lining;
Described labyrinth ring 3 is made up of spaced gland blocks, gland blocks is by the adjustable packing groove be fixed on outer lining inside half-turn 2 and outer lining lower branch 4 of cylindrical spring 5, realize the sealing inside shaft seal housing outer lining, the inner side that described labyrinth ring 3 contacts with turbine rotor is provided with the soft tooth of packing, and turbine rotor passes in labyrinth ring 3.
According to another embodiment of a kind of shaft seal preventing steam-turbine from leaking of the utility model, described labyrinth ring 3 is the two-sided angle labyrinth rings of soft tooth.
According to another embodiment of a kind of shaft seal preventing steam-turbine from leaking of the utility model, after described gland blocks forms packing segmental arc, circumference is total equal with corresponding packing groove circumference overall length.As preferably, the integral diameter of described labyrinth ring 3 be former labyrinth ring 3 seamless time diameter add and increase diameter Δ D, described increase diameter Δ D is multiplied by fracture width numerical value a for cutting off quantity n, again except to obtain in ∏, coordinate so zero clearance between each segmental arc can be realized, coordinate with shaft seal outer lining split place labyrinth ring 3 also can realize zero clearance and coordinate.
As shown in Figure 4 and Figure 5, assemble labyrinth ring 3 for half-turn on axle bush 2 and outer lining lower branch 4, labyrinth ring 3 often encloses and forms by eight sections, and the cutting gap of every section requires it is 0.3mm, so labyrinth ring 3 arc length in cutting process can lose Δ A=0.3x8=2.4mm.If directly press drawing processing vapor seal ring 3, then labyrinth ring 3 is when assembling with half-turn on outer lining 2 and outer lining lower branch 4, and it is 2.4mm that split adds up arc length interstitial defect.Shaft seal split steam leakage is caused for avoiding 2.4mm gap, conventional method is the extra labyrinth ring of independent processing and assembling, special for cutting the longer segmental arc of arc length, and repeatedly adjusts, to make up the segmental arc cutting gap of labyrinth ring 3, the rising of cost of production and assembly cost can be caused like this.
For solving in above problem, the fit diameter of half-turn on outer lining 2 is measured accurately, the external diameter of labyrinth ring 3 is amplified Δ D=2.4/ ∏=0.76mm according to cut-out quantity is unified, amplify the labyrinth ring 3 of 0.76mm diameter, every block coordinates three cylindrical springs 5, according to matching requirements, every half-turn loads four pieces of labyrinth ring blocks, and testing elastic coordinates the gap between rear each gland blocks, other packing grooves are all installed according to above-mentioned requirements, after the terminating by the same requirement assembling of outer lining lower branch 4, on outer lining, half-turn 2 and outer lining lower branch 4 are by taper pin 7, connecting bolt 8 machinery is fixing, inspection shaft seal housing fitting surface gap, inspection labyrinth ring fitting surface gap, qualified rear use outer lining seal ring is strengthened fixing, thus complete shaft seal assembling.
The utility model presses the technological improvement of cutting gap and block number magnifying diameter to labyrinth ring 3, thoroughly solve accumulative arc length in labyrinth ring 3 assembly process short, thus mid-separate surface seal is bad, causes the phenomenon of shaft-packing leakage; The labyrinth ring 3 that diameter parameters is amplified can be assembled on axle bush in half-turn 2 and outer lining lower branch 4 one to one, additionally need not increase auxiliary steam seal ring and supplement and add up the short problem of arc length, can greatly save production cost like this.Shaft seal realizes soft contact seal by the soft tooth of the packing of labyrinth ring 3 and rotor, and labyrinth ring 3 regulates radial steam flow pressure automatically by cylindrical spring 5.When radial steam flow pressure is large, cylindrical spring 5 is to shaft seal housing side compression, and the soft tooth of protection packing, prevents steam flow from losing by elastic force simultaneously; Radial steam flow pressure hour, cylindrical spring 5, to labyrinth ring 3 side compression, prevents steam turbine outside air from entering steam inside environment.
Although be described the utility model with reference to multiple explanatory embodiment of the present utility model here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and mode of execution, these amendments and mode of execution will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of, accompanying drawing open in the application and claim, multiple modification and improvement can be carried out to the constituent elements of subject combination layout and/or layout.Except the distortion carried out constituent elements and/or layout and improving, to those skilled in the art, other purposes also will be obvious.

Claims (4)

1. the shaft seal preventing steam-turbine from leaking, it is characterized in that: comprise half-turn (2) on outer lining seal ring (1), outer lining, labyrinth ring (3) and outer lining lower branch (4), on described outer lining, half-turn (2) and outer lining lower branch (4) are interconnected by split screw, and are fixed by taper pin (7), connecting bolt (8) machinery;
Described outer lining seal ring (1) is arranged in the corresponding seal groove in half-turn on outer lining (2) outside, realizes the sealing outside shaft seal housing outer lining;
Described labyrinth ring (3) is made up of spaced gland blocks, gland blocks is by the adjustable packing groove being fixed on half-turn on outer lining (2) and outer lining lower branch (4) inner side of cylindrical spring (5), realize the sealing inside shaft seal housing outer lining, the inner side that described labyrinth ring (3) contacts with turbine rotor is provided with the soft tooth of packing, and turbine rotor passes in labyrinth ring (3).
2. a kind of shaft seal preventing steam-turbine from leaking according to claim 1, is characterized in that: described labyrinth ring (3) is the two-sided angle labyrinth ring of soft tooth.
3. a kind of shaft seal preventing steam-turbine from leaking according to claim 1, is characterized in that: after described gland blocks forms packing segmental arc, circumference is total equal with corresponding packing groove circumference overall length.
4. a kind of shaft seal preventing steam-turbine from leaking according to claim 3, it is characterized in that: the integral diameter of described labyrinth ring (3) be former labyrinth ring (3) seamless time diameter add and increase diameter Δ D, described increase diameter Δ D is multiplied by fracture width numerical value a for cutting off quantity n, then except obtaining in Π.
CN201520505643.1U 2015-07-14 2015-07-14 Prevent steam turbine steam leak's bearing seal Active CN205225346U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520505643.1U CN205225346U (en) 2015-07-14 2015-07-14 Prevent steam turbine steam leak's bearing seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520505643.1U CN205225346U (en) 2015-07-14 2015-07-14 Prevent steam turbine steam leak's bearing seal

Publications (1)

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CN205225346U true CN205225346U (en) 2016-05-11

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CN201520505643.1U Active CN205225346U (en) 2015-07-14 2015-07-14 Prevent steam turbine steam leak's bearing seal

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109404058A (en) * 2018-12-03 2019-03-01 河北国源电气股份有限公司 Steam turbine packing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109404058A (en) * 2018-12-03 2019-03-01 河北国源电气股份有限公司 Steam turbine packing
CN109404058B (en) * 2018-12-03 2024-01-16 河北国源电气股份有限公司 Steam seal for steam turbine

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C14 Grant of patent or utility model
GR01 Patent grant
CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: 050000 building 18, Xiangjiang Road, Shijiazhuang high tech Zone, Hebei, China, 319

Patentee after: Hebei national source electric Limited by Share Ltd

Address before: 050000 18, Xiangjiang Road, Shijiazhuang high tech Zone, Hebei, China, 319

Patentee before: Hebei Guo Yuan power equipment Co., Ltd