CN105156680A - Novel honeycomb seal structure capable of enhancing sealing characteristic and damping characteristic - Google Patents

Novel honeycomb seal structure capable of enhancing sealing characteristic and damping characteristic Download PDF

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Publication number
CN105156680A
CN105156680A CN201510582165.9A CN201510582165A CN105156680A CN 105156680 A CN105156680 A CN 105156680A CN 201510582165 A CN201510582165 A CN 201510582165A CN 105156680 A CN105156680 A CN 105156680A
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CN
China
Prior art keywords
seal
honeycomb
rotor
wedge shape
shape boss
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Pending
Application number
CN201510582165.9A
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Chinese (zh)
Inventor
赵欢
孙丹
艾延廷
王猛飞
王良全
蒋泽乾
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Shenyang Aerospace University
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Shenyang Aerospace University
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Priority to CN201510582165.9A priority Critical patent/CN105156680A/en
Publication of CN105156680A publication Critical patent/CN105156680A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a novel honeycomb seal structure capable of enhancing sealing characteristic and damping characteristic, which comprises a seal sleeve, a seal body, annular wedge lug bosses, a honeycomb belt and a rotor, wherein the seal body is installed on the seal sleeve and provided with the honeycomb belt in the circumferential direction; the rotor is positioned in the annular chamber formed by the honeycomb belt; the circumferential surface of the rotor is provided with the plurality of sets of annular wedge lug bosses in the axial direction; the included angle theta between the annular wedge lug bosses and the rotor surface is greater than or equal to 20 degrees and smaller than or equal to 70 degrees; the radial height h of the annular wedge lug bosses is 0.2-0.6 time of the seal radius clearance (R-r); and the axial distance l between every two adjacent annular wedge lug bosses is 0.5-3 times of the opposite side distance of the honeycomb. The annular wedge lug boss structure on the rotor circumferential surface has efficient segmentation effect, promotes the boundary layer separation of the honeycomb seal clearance jet fluid, fully displays the energy dissipation action of the honeycomb core grids, increases the flow resistance of the seal clearance jet fluid, and lowers the direct connection effect capable of causing seal leakage.

Description

A kind of New honeycomb sealing configuration improving sealing characteristics and damping characteristic
Technical field
The present invention relates to the movable sealing structure in a kind of rotating machinery, especially a kind of New honeycomb sealing configuration improving sealing characteristics and damping characteristic.
Background technique
Honeycomb seal is the critical component of the rotating machineries such as aeroengine, steam turbine, compressor.For traditional labyrinth seal, honeycomb seal not only has good sealing characteristics, and also has good rotor dynamics.Honeycomb seal allows application under High Pressure Difference condition and does not increase the size of sealing, has higher safety reliability.Therefore honeycomb seal is widely used in the rotating machinery of the industry fields such as Aero-Space, electric power, petrochemical industry.
Honeycomb seal is mainly made up of stuffing box gland, seal, cellular band and rotor, and cellular band is made up of Hexagon chalcid fly socket bore.Flow field characteristic and the sealing mechanism of honeycomb seal are as follows: honeycomb seal inner fluid flow mainly comprise honeycomb wall and rotor clearance fluid high-speed jet and honeycomb core lattice in eddy-currents two-part.Under the effect that axial pressure difference and rotor rotate, the gap location of cellular band and rotor forms high-speed jet due to throttling action, this strand of jet is close to rotating shaft face and is entered seal clearance with larger speed, high-speed jet promotes the straight-through effect of seal leakage, add the leakage rate of sealing, be unfavorable for sealing characteristics and the damping characteristic of honeycomb seal.Another part fluid forms whirlpool under the effect of honeycomb core lattice, the special hexagonal structure of honeycomb core lattice defines a netted structure above rotating shaft face, air-flow cutting and separating is countless little eddy current by enclosed honeycomb core graticule mesh lattice, these whirlpools being full of whole honeycomb chamber are by the energy dissipation of gas just, thus the sealing effect forming damping function and stop fluid to leak.
Research shows, legacy cellular seals because rotor surface is smooth, fluid throttling when passing through seal clearance is accelerated, the jet action of honeycomb seal interstitial fluid is larger, high-speed jet promotes the straight-through effect of seal leakage, add the leakage rate of sealing, be unfavorable for sealing characteristics and the damping characteristic of honeycomb seal.And be close to the fluid of rotor surface and honeycomb hole wall due to viscosity and boundary layer effect, cutting effect is less, is difficult to realize being separated, and causes high-speed jet to flow through honeycomb core lattice less, and honeycomb core lattice whirlpool produces less, and fluid directly flows out outlet from gap.Honeycomb core lattice do not form strong whirlpool, and fluid energy is fully dissipated.Therefore smooth rotor causes the effect of honeycomb core lattice energy dissipation insufficient, forms whirlpool less, greatly reduce the energy dissipation effect of honeycomb seal, directly affect obturaging and damping function of honeycomb seal in honeycomb core lattice.
Summary of the invention
For above-mentioned the deficiencies in the prior art, the invention provides a kind of New honeycomb sealing configuration improving sealing characteristics and damping characteristic.
For achieving the above object, the technical solution used in the present invention is: a kind of New honeycomb sealing configuration improving sealing characteristics and damping characteristic, comprises stuffing box gland, seal, hoop wedge shape boss, cellular band and rotor.Seal is arranged on stuffing box gland, and seal is circumferentially with cellular band.Rotor is in the annular chamber of cellular band formation.Rotor is provided with many group hoop wedge shape boss in its peripheral surface vertically.Angle theta between hoop wedge shape boss and rotor surface is 20 °≤θ≤70 °, the radial height h of hoop wedge shape boss is 0.2 ~ 0.6 times of sealing radius clearance (R-r), and adjacent ring is 0.5 ~ 3 times of honeycomb opposite side distance to the axial spacing l of wedge shape boss.R is the radial distance of cellular band bottom to rotor axis, and r is the radius of rotor.
Preferably, described cellular band is made up of hexagonal honeycomb core lattice, and the opposite side distance of honeycomb core lattice is 2 ~ 5mm, and core lattice wall thickness is 0.1 ~ 0.5mm, and the core lattice degree of depth is 2 ~ 8mm.
Preferably, be provided with T-slot in stuffing box gland, seal is fixed together by T-slot in a circumferential direction and stuffing box gland.
The present invention uses for reference boundary layer separation theory, and propose a kind of New honeycomb sealing configuration improving sealing characteristics and damping characteristic, its major advantage is as follows:
1, do not change the overall structure of legacy cellular sealing, many group hoop wedge shape boss are only set on periphery of rotor surface, make this New honeycomb sealing configuration simple, be easy to processing;
2, the periphery of rotor surface hoop wedge shape boss structure of the present invention's design has efficient cutting effect, promote the boundary layer separation of honeycomb seal gap Jetstream fluid, by hoop wedge shape boss, seal clearance jet is introduced in honeycomb core lattice, fluid forms stronger whirlpool at honeycomb core lattice, make honeycomb core lattice give full play to energy dissipation effect, improve sealing characteristics and the damping characteristic of honeycomb seal;
3, hoop wedge shape boss structure adds the flow resistance of seal clearance Jetstream fluid, reduces the straight-through effect causing seal leakage, improves the sealing characteristics of New honeycomb sealing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is rotor surface wedge shape boss structure schematic diagram.
Fig. 3 is the A-A direction view of Fig. 1.
In figure: 1-stuffing box gland; 2-seal; 3-cellular band; 4-hoop wedge shape boss; 5-rotor.
Embodiment
As shown in Figure 1-Figure 3: a kind of New honeycomb sealing configuration improving sealing characteristics and damping characteristic, comprises stuffing box gland 1, seal 2, hoop wedge shape boss 4, cellular band 3 and rotor 5.Seal 2 is arranged on stuffing box gland 1 by T-slot, seal 2 is circumferentially with cellular band 3.Stuffing box gland 1, seal 2 all belong to stator part with cellular band 3.Rotor 5 is in the annular chamber of cellular band 3 formation.Rotor 5 is provided with many group hoop wedge shape boss 4 in its peripheral surface vertically.Angle theta between hoop wedge shape boss 4 and rotor 5 surface is 30 °, and the radial height h of hoop wedge shape boss 4 is 0.6 times of sealing radius clearance (R-r), and adjacent ring is 3 times of honeycomb opposite side distance to the axial spacing l of wedge shape boss 4.R is the radial distance of cellular band bottom to rotor axis, and r is the radius of rotor.This invention is applicable to high pressure side in hoop wedge shape boss front end, and low voltage side is in the situation of hoop wedge shape boss rear end.In Fig. 1, right side is low voltage side L, and left side is high pressure side H.
Periphery of rotor surface of the present invention hoop wedge shape boss structure has efficient cutting effect, the boundary layer separation of honeycomb seal gap Jetstream fluid can be promoted, seal clearance jet body is introduced in honeycomb core lattice by hoop wedge shape boss, fluid forms stronger whirlpool at honeycomb core lattice, make honeycomb core lattice give full play to energy dissipation effect, improve sealing characteristics and the damping characteristic of honeycomb seal.
The present invention continues to use current a lot of fixing seal and installs fixing T-slot mounting type.New honeycomb sealing is designed to the fixed component being fixed on cylinder T-slot, does not change the overall structure of legacy cellular sealing, many group hoop wedge shape boss are only set on periphery of rotor surface.Hoop wedge shape boss structure has efficient cutting effect, and can promote the boundary layer separation of honeycomb seal gap Jetstream fluid, makes honeycomb core lattice give full play to energy dissipation effect, improves sealing characteristics and the damping characteristic of honeycomb seal.

Claims (3)

1. improve a New honeycomb sealing configuration for sealing characteristics and damping characteristic, it is characterized in that: comprise stuffing box gland, seal, hoop wedge shape boss, cellular band and rotor; Seal is arranged on stuffing box gland, seal is circumferentially with cellular band, rotor is in the annular chamber of cellular band formation, rotor is provided with many group hoop wedge shape boss in its peripheral surface vertically, angle theta between hoop wedge shape boss and rotor surface is 20 °≤θ≤70 °, the radial height h of hoop wedge shape boss is 0.2 ~ 0.6 times of sealing radius clearance (R-r), adjacent ring is 0.5 ~ 3 times of honeycomb opposite side distance to the axial spacing l of wedge shape boss, R is the radial distance of cellular band bottom to rotor axis, and r is the radius of rotor.
2. a kind of New honeycomb sealing configuration improving sealing characteristics and damping characteristic as claimed in claim 1, it is characterized in that: described cellular band is made up of hexagonal honeycomb core lattice, the opposite side distance of honeycomb core lattice is 2 ~ 5mm, and core lattice wall thickness is 0.1 ~ 0.5mm, and the core lattice degree of depth is 2 ~ 8mm.
3. a kind of New honeycomb sealing configuration improving sealing characteristics and damping characteristic as claimed in claim 1, it is characterized in that: be provided with T-slot in stuffing box gland, seal is fixed together by T-slot in a circumferential direction and stuffing box gland.
CN201510582165.9A 2015-09-14 2015-09-14 Novel honeycomb seal structure capable of enhancing sealing characteristic and damping characteristic Pending CN105156680A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510582165.9A CN105156680A (en) 2015-09-14 2015-09-14 Novel honeycomb seal structure capable of enhancing sealing characteristic and damping characteristic

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106246240A (en) * 2016-07-29 2016-12-21 中国航空工业集团公司沈阳发动机设计研究所 A kind of brush seal structure
CN106640741A (en) * 2017-01-04 2017-05-10 珠海格力节能环保制冷技术研究中心有限公司 Sealing component and compression engine and air conditioner
CN107355540A (en) * 2017-08-18 2017-11-17 国网湖南省电力公司 Gap adaptively adjusts sealing structure
CN114183532A (en) * 2021-11-25 2022-03-15 沈阳鼓风机集团股份有限公司 Sealing structure of turbine and turbine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040239040A1 (en) * 2003-05-29 2004-12-02 Burdgick Steven Sebastian Nozzle interstage seal for steam turbines
WO2010021566A1 (en) * 2008-08-06 2010-02-25 Lisyanskiy Aleksandr Stepanovi Labyrinth shroud seal for a steam turbine
US20100259013A1 (en) * 2009-04-09 2010-10-14 Rolls-Royce Deutschland Ltd & Co Kg Abradable labyrinth seal for a fluid-flow machine
US7971882B1 (en) * 2007-01-17 2011-07-05 Florida Turbine Technologies, Inc. Labyrinth seal
CN202215308U (en) * 2011-08-09 2012-05-09 北京安达泰克科技有限公司 Honeycomb steam sealing structure of steam turbine
CN102979627A (en) * 2011-09-06 2013-03-20 通用电气公司 Stepped conical honeycomb seal carrier
CN203669938U (en) * 2014-01-16 2014-06-25 华北电力大学 Tilting labyrinth vapor seal steam turbine
CN104481595A (en) * 2014-11-12 2015-04-01 上海发电设备成套设计研究院 Steam turbine honeycomb opposite tooth steam seal device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040239040A1 (en) * 2003-05-29 2004-12-02 Burdgick Steven Sebastian Nozzle interstage seal for steam turbines
US7971882B1 (en) * 2007-01-17 2011-07-05 Florida Turbine Technologies, Inc. Labyrinth seal
WO2010021566A1 (en) * 2008-08-06 2010-02-25 Lisyanskiy Aleksandr Stepanovi Labyrinth shroud seal for a steam turbine
US20100259013A1 (en) * 2009-04-09 2010-10-14 Rolls-Royce Deutschland Ltd & Co Kg Abradable labyrinth seal for a fluid-flow machine
CN202215308U (en) * 2011-08-09 2012-05-09 北京安达泰克科技有限公司 Honeycomb steam sealing structure of steam turbine
CN102979627A (en) * 2011-09-06 2013-03-20 通用电气公司 Stepped conical honeycomb seal carrier
CN203669938U (en) * 2014-01-16 2014-06-25 华北电力大学 Tilting labyrinth vapor seal steam turbine
CN104481595A (en) * 2014-11-12 2015-04-01 上海发电设备成套设计研究院 Steam turbine honeycomb opposite tooth steam seal device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106246240A (en) * 2016-07-29 2016-12-21 中国航空工业集团公司沈阳发动机设计研究所 A kind of brush seal structure
CN106640741A (en) * 2017-01-04 2017-05-10 珠海格力节能环保制冷技术研究中心有限公司 Sealing component and compression engine and air conditioner
CN106640741B (en) * 2017-01-04 2022-08-02 珠海格力节能环保制冷技术研究中心有限公司 Sealing member, compressor and air conditioner
CN107355540A (en) * 2017-08-18 2017-11-17 国网湖南省电力公司 Gap adaptively adjusts sealing structure
CN114183532A (en) * 2021-11-25 2022-03-15 沈阳鼓风机集团股份有限公司 Sealing structure of turbine and turbine

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Application publication date: 20151216

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