CN106593938A - Mechanical labyrinth seal for nuclear main pump two-way thrust bearing circulating lubricating oil system - Google Patents
Mechanical labyrinth seal for nuclear main pump two-way thrust bearing circulating lubricating oil system Download PDFInfo
- Publication number
- CN106593938A CN106593938A CN201611166943.7A CN201611166943A CN106593938A CN 106593938 A CN106593938 A CN 106593938A CN 201611166943 A CN201611166943 A CN 201611166943A CN 106593938 A CN106593938 A CN 106593938A
- Authority
- CN
- China
- Prior art keywords
- static
- labyrinth seal
- thrust bearing
- lubricating oil
- bezel ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
- F04D29/061—Lubrication especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Of Bearings (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention relates to a mechanical labyrinth seal for a nuclear main pump two-way thrust bearing circulating lubricating oil system. The mechanical labyrinth seal is composed by rotary sealing sleeves (3) and static cover rings (4), the rotary sealing sleeves (3) are connected on a motor shaft (1) through socket head screws (5), and the static cover rings (4) are mounted on thrust bearing rooms (2) and tightened through hexagon-headed bolts (6). The structure is that the rotary sealing sleeves are fixed on the motor shaft, the static cover rings are fixed on the upper bearing rooms, and the mechanical labyrinth seal structure is composed. When operating is stable, leakage of circulating lubricating oil is prevented, the circulating oil can be protected from dissipation after high-temperature gasification, and environment pollution is avoided. According to the mechanical labyrinth seal, the structure is succinct, dismounting and assembly are convenient, applicability is strong, and the mechanical labyrinth seal is adaptable to the sealing of different magnitudes of the nuclear main pump two-way thrust bearing circulating lubricating oil systems.
Description
Technical field：The present invention relates to core main pump two-direction thrust bearing circulating lubricating oil system mechanics formula labyrinth seal.
Background technology：Traditional labyrinth seal is that several ring packing teeths being arranged in order, tooth and tooth are set around rotating shaft
Between form a series of throttle clearances and expansion cavity, sealing medium produce throttle effect at the gap by tortuous labyrinth and
Reach Drain Resistance purpose.High-end labyrinth sealing belongs to high-tech product, there was only Switzerland's Sulzer (SULZER) in the world at present
The only a few manufacturer production such as company, the various high standard labyrinth types needed for current country's petrochemical industry all rely on import.Tradition
Labyrinth seal by on-way resistance and local resistance loss blood pressure lowering, therefore seals number of teeth amount, shape to mill resistance with ring packing teeth
Affect larger and poor to biphase gas and liquid flow sealing effectiveness, sealing leak amount is larger.Core main pump two-direction thrust bearing circulates oil system
Mechanical type labyrinth seal is provided with Medium Diffusion groove, and sealing medium carries out reduction of speed into before annular seal space, reduces amount of leakage, using spiral
Type seals teeth groove, and sealing medium is pumped to into spreading grooves along sealing teeth groove, zero leakage purpose has been reached, it is adaptable to gas-liquid two-phase
The sealing of stream lubricating oil.
The content of the invention：
The purpose of the present invention is to disclose contactless, the easy accessibility of one kind, core main pump bidirectional propulsion axle applied widely
Hold circulating lubricating oil system mechanics formula labyrinth seal.The technical scheme is that：One seed nucleus main pump two-direction thrust bearing is circulated
Lubricating oil system mechanical type labyrinth seal, rotatory sealing sleeve (3) constitutes mechanical type labyrinth seal, rotation with static bezel ring, (4)
By socket head screw (5) closing on motor shaft (1), static bezel ring, (4) is installed to thrust bearing room (2) to seal sleeve (3)
On, and by hexagon-headed bolt (6) tight, rotatory sealing sleeve (3) appearance surface build-up welding babbit layer；Open on static bezel ring, (4)
If spreading grooves (7), static bezel ring, (4) inner surface is offered and multiple is uniformly distributed levoform helical cuts (8), rotatory sealing sleeve
(3) preset clearance is carried with static bezel ring, (4) assembling.
Static bezel ring, (4) inner surface opens up 36 and is uniformly distributed levoform helical cuts (8), levoform helical cuts (8)
Lead of screw be 445mm, helical cuts groove depth 0.6mm, groove width 2mm, rotatory sealing sleeve (3) and static bezel ring, (4) are assembled
Between slot reservation 0.3mm.
The present invention, can be used for the difference heap-type core main pump two-direction thrust bearing circulation profit such as ACP1000MW, CPR1000MW
The sealing of oil system.
The invention has the beneficial effects as follows：
(1) present invention by rotatory sealing sleeve with stationary cover ring group into mechanical type labyrinth seal, in structure, rotatory sealing set
Tube outer surface heap babbitlining, improves sealing surface wearability.Gap is much larger than between rotatory sealing sleeve and static bezel ring,
Rotor radial vibration values, it is to avoid dry friction occurs and the service life for sealing is reduced.
(2) as shown in Figure 6, Figure 7, static slip ring inner surface opens up 36 and is uniformly distributed levoform helical cuts, it is considered to
To the lubricating oil two phase flow actual operating mode of sealing, antihypertensive effect can be adjusted by changing lead of screw, the present invention is left-handed
Formula lead of screw is designed as 445mm, and helical cuts groove depth 0.6mm, groove width 2mm meets the sealing of core main pump lubricating oil two phase flow；
Actual condition is vibrated according to main pump rotor radial, rotatory sealing sleeve is 0.3mm with the fit-up gap of static bezel ring,.
(3) 36 left hand thread blades under rotatory sealing sleeve is with motor shaft rotate counterclockwise operating mode, with static bezel ring,
Reverse extrusion is formed, effect had both been pumped, is calculated by the way that CFD is smooth, lubricating oil mixed flow is along helicla flute otch blowback spreading grooves；
Under static operating mode, reduce into the mixing liquid in seal clearance, and lubricating oil viscosity of mixed liquid is larger, periodic helicla flute
Otch produces larger mill inhibition effect, and the oil gas pressure into sealing intracavity is gradually lost with the change of seal clearance.
(4) lubricating oil flows into labyrinth after the strike the oil equipment pressurization of thrust bearing room after lubrication, cooling bearing indoor assembly
Seal cavity, and the counter-pressure effect in labyrinth seal pushes oil sump tank, forms oil circulation system, finally realizes lubricating oil
Controllable low pressure " zero leakage ".
Operation principle of the present invention：The construction featuress of the present invention are contactless, rotatory sealing sleeve outer surface built-up welding Pasteur
Alloy, increases wearability；Static slip ring inner surface opens up 36 and is uniformly distributed levoform helical cuts, and helical cuts are opened up to the greatest extent
The mill inhibition effect and medium of sealing medium rotation status periodical may be considered along otch backflow effeet；According to main pump rotor
Radial vibration actual condition, rotatory sealing sleeve is 0.3mm with the fit-up gap of static bezel ring,.Opening up for otch is rotated, fully
Consider lubricating oil 80 DEG C of frictional resistance effects under liquid, the biphase operating mode of gaseous state, a fluid stream blockage effect, thermomechanical effect with
And pumping effect.Under operating condition, (about 80 DEG C of temperature, pressure is about for the lubricating oil flowed out after cooling, lubrication bearing chamber intraware
1.5bar, flow about 0.45L/s) seal cavity is entered, Jing labyrinth seal blood pressure lowerings, gas-liquid mixed oil gas is finally returned with zero leakage
Bearing lubrication oil circulating system.
Description of the drawings
Fig. 1 is the static bezel ring, sectional arrangement drawing of core main pump two-direction thrust bearing circulating lubricating oil system mechanics formula labyrinth seal
Fig. 2 is that the assembling of core main pump two-direction thrust bearing circulating lubricating oil system mechanics formula labyrinth seal rotatory sealing sleeve is cutd open
View
Fig. 3 is rotatory sealing sleeve and static bezel ring, fit-up gap partial enlarged drawing
Fig. 4 is rotatory sealing sleeve sectional view
Fig. 5 is rotatory sealing sleeve partial enlarged drawing
Fig. 6 is static bezel ring, sectional view
Fig. 7 is static bezel ring, partial enlarged drawing
Specific embodiment
As shown in figure 1, a seed nucleus main pump two-direction thrust bearing circulating lubricating oil system mechanics formula labyrinth seal, rotatory sealing
Sleeve 3 constitutes mechanical type labyrinth seal with static bezel ring, 4, as shown in Fig. 2 rotatory sealing sleeve 3 is closed for 5 by socket head screw
To on motor shaft 1, static bezel ring, 4 is installed on thrust bearing room 2, and by hexagon-headed bolt 6 tight, as shown in figure 3, rotation is close
Sealing function gap is formed after big envelope cylinder 3 and the assembling of static bezel ring, 4.As shown in figure 4, the appearance surface build-up welding bar of rotatory sealing sleeve 3
Family name's alloy, increases wearability；Static bezel ring, 4 opens up spreading grooves 7, medium kinetic energy is reduced, as shown in figure 5, the inner surface of static bezel ring, 4
Offer 36 and be uniformly distributed levoform helical cuts 8, lead of screw 445mm, otch 8 is opened up and consider as far as possible sealing medium rotation
Turn the mill inhibition effect and medium of state periodical along otch backflow effeet；Actual condition is vibrated according to main pump rotor radial,
The 0.3mm reserved with the fit-up gap of static bezel ring, 4 of rotatory sealing sleeve 3.
Helicla flute of the present invention is opened on static bezel ring, and axle sleeve is smooth, and helix length is short, and with conventional helical larger difference is sealed with
It is different；The checking tested by core main pump full flow, oil seal is stable, and result of the test is preferable, neither there is oil leakage, does not also have
There is visible liquefaction oil droplet；
The present invention is contactless, easy accessibility, applied widely, can be used for the differences such as ACP1000MW, CPR1000MW
Heap-type core main pump, and be easy to safeguard, reliable, safe handling degree is high.
Claims (2)
1. a seed nucleus main pump two-direction thrust bearing circulating lubricating oil system mechanics formula labyrinth seal, is characterized in that：Rotatory sealing set
Cylinder (3) constitutes mechanical type labyrinth seal with static bezel ring, (4), and rotatory sealing sleeve (3) is by socket head screw (5) conjunction to electricity
On arbor (1), static bezel ring, (4) is installed on thrust bearing room (2), and by hexagon-headed bolt (6) tight, rotatory sealing sleeve
(3) appearance surface build-up welding babbit layer；Spreading grooves (7) are opened up on static bezel ring, (4), static bezel ring, (4) inner surface offers many
Individual to be uniformly distributed levoform helical cuts (8), rotatory sealing sleeve (3) carries preset clearance with static bezel ring, (4) assembling.
2. according to claim 11, one seed nucleus main pump two-direction thrust bearing circulating lubricating oil system mechanics formula labyrinth is close
Envelope, is characterized in that：Static bezel ring, (4) inner surface opens up 36 and is uniformly distributed levoform helical cuts (8), levoform helical cuts
(8) lead of screw is 445mm, and helical cuts groove depth 0.6mm, groove width 2mm, rotatory sealing sleeve (3) is filled with static bezel ring, (4)
With a slot reservation 0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611166943.7A CN106593938A (en) | 2016-12-16 | 2016-12-16 | Mechanical labyrinth seal for nuclear main pump two-way thrust bearing circulating lubricating oil system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611166943.7A CN106593938A (en) | 2016-12-16 | 2016-12-16 | Mechanical labyrinth seal for nuclear main pump two-way thrust bearing circulating lubricating oil system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106593938A true CN106593938A (en) | 2017-04-26 |
Family
ID=58599567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611166943.7A Pending CN106593938A (en) | 2016-12-16 | 2016-12-16 | Mechanical labyrinth seal for nuclear main pump two-way thrust bearing circulating lubricating oil system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106593938A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760156A (en) * | 2018-07-25 | 2018-11-06 | 哈尔滨电气动力装备有限公司 | The experimental rig of core main pump self-loopa oil pump and oily mechanical sealing performance |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB816762A (en) * | 1957-08-30 | 1959-07-15 | Cross Mfg Co 1938 Ltd | Improvements in labyrinth fluid sealing devices |
| GB843021A (en) * | 1957-09-03 | 1960-08-04 | Napier & Son Ltd | Improvements relating to thrust bearings, face seals or the like |
| CN2089550U (en) * | 1991-02-28 | 1991-11-27 | 北京化工学院 | Labyrinth screw combined seal device |
| JPH1113687A (en) * | 1997-06-20 | 1999-01-19 | Daikin Ind Ltd | Turbo machinery |
| CN2498408Y (en) * | 2001-09-19 | 2002-07-03 | 左俊业 | Floated labyrinth spiral composite sealer |
| US20080246224A1 (en) * | 2005-09-21 | 2008-10-09 | High Technology Investments, B.V. | Combined Labyrinth Seal and Screw-Type Gasket Bearing Sealing Arrangement |
| CN101526135A (en) * | 2009-04-17 | 2009-09-09 | 丹东克隆集团有限责任公司 | Labyrinth combined type mechanical sealing device |
| CN201306450Y (en) * | 2008-12-15 | 2009-09-09 | 新疆乌苏市北方新科有限公司 | Labyrinth assembly sealing device for assembled welding metal bellows with large axial diameter |
| US20130214492A1 (en) * | 2012-02-16 | 2013-08-22 | Solar Turbines Incorporated | Gas turbine engine lubrication fluid barrier |
| CN203272216U (en) * | 2013-05-30 | 2013-11-06 | 哈尔滨电气动力装备有限公司 | Mechanical labyrinth seal of nuclear main pump bidirectional thrust bearing circulation lubricating oil system |
-
2016
- 2016-12-16 CN CN201611166943.7A patent/CN106593938A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB816762A (en) * | 1957-08-30 | 1959-07-15 | Cross Mfg Co 1938 Ltd | Improvements in labyrinth fluid sealing devices |
| GB843021A (en) * | 1957-09-03 | 1960-08-04 | Napier & Son Ltd | Improvements relating to thrust bearings, face seals or the like |
| CN2089550U (en) * | 1991-02-28 | 1991-11-27 | 北京化工学院 | Labyrinth screw combined seal device |
| JPH1113687A (en) * | 1997-06-20 | 1999-01-19 | Daikin Ind Ltd | Turbo machinery |
| CN2498408Y (en) * | 2001-09-19 | 2002-07-03 | 左俊业 | Floated labyrinth spiral composite sealer |
| US20080246224A1 (en) * | 2005-09-21 | 2008-10-09 | High Technology Investments, B.V. | Combined Labyrinth Seal and Screw-Type Gasket Bearing Sealing Arrangement |
| CN201306450Y (en) * | 2008-12-15 | 2009-09-09 | 新疆乌苏市北方新科有限公司 | Labyrinth assembly sealing device for assembled welding metal bellows with large axial diameter |
| CN101526135A (en) * | 2009-04-17 | 2009-09-09 | 丹东克隆集团有限责任公司 | Labyrinth combined type mechanical sealing device |
| US20130214492A1 (en) * | 2012-02-16 | 2013-08-22 | Solar Turbines Incorporated | Gas turbine engine lubrication fluid barrier |
| CN203272216U (en) * | 2013-05-30 | 2013-11-06 | 哈尔滨电气动力装备有限公司 | Mechanical labyrinth seal of nuclear main pump bidirectional thrust bearing circulation lubricating oil system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760156A (en) * | 2018-07-25 | 2018-11-06 | 哈尔滨电气动力装备有限公司 | The experimental rig of core main pump self-loopa oil pump and oily mechanical sealing performance |
| CN108760156B (en) * | 2018-07-25 | 2023-12-26 | 哈尔滨电气动力装备有限公司 | Nuclear self-circulation oil pump and oil mechanical sealing performance test device for main pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4225686B2 (en) | Cooling screw type vacuum pump | |
| JP5964245B2 (en) | Screw machine lubrication | |
| CN102248445B (en) | The cooling construction of machine tool chief axis | |
| CN206468449U (en) | Gas turbine rotor sealing graphite seal device and gas turbine | |
| CN103225624A (en) | Double-casing symmetric type radial subdivision multiple-stage centrifugal pump | |
| CN115076374B (en) | Throttling efficient non-contact self-impact seal with fixed gap | |
| CN106593938A (en) | Mechanical labyrinth seal for nuclear main pump two-way thrust bearing circulating lubricating oil system | |
| CN104976133A (en) | High temperature water pump of mechanical seal and vortex pump closed type self-circular system | |
| CN203214340U (en) | Double-shell symmetric radially-split multistage centrifugal pump | |
| CN204082560U (en) | Crude oil pipeline conveying oil line pump | |
| CN214247423U (en) | Transparent and Brayton cycle system | |
| CN109309430A (en) | A kind of motor cooling of spindle central water cooling | |
| US20060222553A1 (en) | Rotary piston pump | |
| CN203272216U (en) | Mechanical labyrinth seal of nuclear main pump bidirectional thrust bearing circulation lubricating oil system | |
| JP6467324B2 (en) | Screw compressor | |
| CN111456944A (en) | High-speed low-temperature magnetic pump | |
| JP2011140899A (en) | Method of modifying gas turbine plant | |
| HU207380B (en) | Bearing arrangement with bearing lubricant intaking device | |
| CN105927542A (en) | Rotor shaft seal structure for double-screw compressor | |
| CN102720696A (en) | Preheating water pump | |
| CN208503097U (en) | Sealing structure and compressor | |
| CN205638948U (en) | Nuclear power station residual heat removal pump | |
| EP3274588A1 (en) | Heat shield for pressure casing | |
| CN204805103U (en) | Mechanical seal takes high temperature water pump of swirl pump closed from circulation system | |
| CN116816908B (en) | Sealing structure of wind power generation gear box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170426 |
|
| WD01 | Invention patent application deemed withdrawn after publication |