CN107676294A - A kind of shaft sealer suitable for HTHP multistage pump - Google Patents
A kind of shaft sealer suitable for HTHP multistage pump Download PDFInfo
- Publication number
- CN107676294A CN107676294A CN201710898981.XA CN201710898981A CN107676294A CN 107676294 A CN107676294 A CN 107676294A CN 201710898981 A CN201710898981 A CN 201710898981A CN 107676294 A CN107676294 A CN 107676294A
- Authority
- CN
- China
- Prior art keywords
- pump
- bearing shell
- hthp
- groove
- shaft
- 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
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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
- F04D29/10—Shaft sealings
- F04D29/106—Shaft 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides the shaft sealer suitable for HTHP multistage pump, including water lubriucated bearing, mechanical seal and seal casinghousing；The water lubriucated bearing is arranged between pump shaft and the pump housing, and the mechanical seal is arranged between pump shaft and seal casinghousing；The water lubriucated bearing includes the first axle sleeve and bearing shell, and first axle sleeve is located in bearing shell, and gap is provided between the first axle sleeve and bearing shell；The bearing shell outer surface is provided with water storage cavity, some through holes of bearing shell radial equipartition, the water storage cavity is connected with gap；Intake tunnel, the high-pressure side of the side connection multistage pump of the intake tunnel are provided with the pump housing, the intake tunnel opposite side connects water storage cavity；The sealing surface edge of the stationary ring is provided with radially distributed groove.The present invention can improve lubricant effect and reduce leakage loss, and increase non-contacting mechanical seal device on this basis, can run in the case of no any individually cooling water conveying system.
Description
Technical field
The present invention relates to multistage pump field of sealing technology, more particularly to a kind of sealing suitable for HTHP multistage pump fills
Put.
Background technology
With the fast development of modern industry, increasing operating mode can make centrifugal pump be operated in high pressure, high speed and high temperature
Environment in, such as in nuclear power pump on fill the super critical boiler feed pump in pump and thermoelectricity pump.And in these high temperature, height
Had some limitations in press pump using water lubriucated bearing and mechanical seal.For water lubriucated bearing, water is in high temperature height
It is low to depress viscosity, it is impossible to good lubrication is produced, and leakage loss is big, so water lubriucated bearing is dfficult to apply to high temperature
In hyperbaric environment.But the bearing requirements for above filling pump or high pressure water feeding pump for boiler often can be safe and reliable for a long time
Operation, it is the design service life of some time to be had, and water lubriucated bearing is moistening then without this concept of projected life
Infinite life of under theoretical under sliding normal condition, so from if this point considers, water lubriucated bearing be especially suitable for it is such
High pressure-temperature pump, and the use of water lubriucated bearing is being often to solve the problems, such as that its leakage rate is big using mechanical seal.It is right
For mechanical seal, water is not good lubricant to water at high temperature under high pressure, and due to the pressure drop on sealing surface, sealing water can be
Flashed in flow process to steam.Common practice is to provide single cooling water washing for sealing to keep in this case
Its feature, so as to keep rational durability and prevent unnecessary leakage, but the processing of this auxiliary equipment adds peace
Dress and the expense of operation.So select suitable water lubriucated bearing and mechanical sealing assembly most important.
CN104989726A discloses disturbance rejection self-balancing water lubricating thrust bearing supporting construction, and the program is by spacing knot
The structure of structure, supporting construction, self-balance structure, follower structure, flow passage structure etc. five is formed.The invention adds Self-balancing,
When thrust disc moves axially, it can ensure that thrust bearing shoe valve and thrust disc remain contact, avoid traditional water lubriucated bearing from pushing away
Dynamic loading when power disk contacts with thrust bearing shoe valve, reduce the impact to tiling material.CN202674018U discloses water lubrication shaft
Hold, the program is provided with the working face of support rotating part.It is provided with bearing to receive the water stream channel of pressurised stream.Water stream channel
Multiple delivery ports are provided with working face so that the pressurised stream in water stream channel can be directed to working face by multiple delivery ports
And the pressure moisture film to support rotating part is formed on working face, so as to reduce material and design cost, improve support stiffness.
CN105673547A discloses a kind of water lubricating thrust bearing possessing component, and the program includes thrust disc and stainless steel thrust button, thrust
Disk includes hard metal matrix, includes not covered with non-metallic wear resistant layer, stainless steel thrust button in the annular end face of metallic matrix
Become rusty steel annular matrix, the side of annular matrix be provided with multiple stainless steels fan annular friction block, adjacent fan annular friction block it
Between form lubri-cating-water groove, be provided with and fan annular friction block number mesh corresponding stainless steel fan annular brace in the opposite side of annular matrix
Block, forms bosh between adjacent fan annular support block, fan annular support block with fan annular friction block in a circumferential direction
It is staggered, the symmetry axis for fanning annular support block overlaps with projection of the lubri-cating-water groove center line in matrix annular end face, so that should
Water lubricating thrust bearing possessing component have axial carrying capacity is strong, good cooling results, abrasive resistance are strong, good corrosion resistance, operation resistance
The advantages that power is small, service life is long.
But above scheme does not all account for how selecting suitable water lubriucated bearing and machine in the case of HTHP
Tool seal assembly, and how to enable both moderately good operations.
The content of the invention
For Shortcomings in the prior art, the invention provides a kind of sealing dress suitable for HTHP multistage pump
Put, by provided with water storage cavity, duct and helicla flute, for improving lubricant effect and reducing leakage loss, and increasing on this basis
Add non-contacting mechanical seal device, can run in the case of no any individually cooling water conveying system.
The present invention is to realize above-mentioned technical purpose by following technological means.
A kind of shaft sealer suitable for HTHP multistage pump, including water lubriucated bearing, mechanical seal and capsul
Body；The seal casinghousing is fixed on the pump housing；The water lubriucated bearing is arranged between pump shaft and the pump housing, the mechanical seal peace
Between pump shaft and seal casinghousing；The water lubriucated bearing includes the first axle sleeve and bearing shell, and described bearing shell is fixed on the pump housing
On, the first described axle sleeve is fixed on pump shaft, and first axle sleeve is located in bearing shell, and is provided between the first axle sleeve and bearing shell
Gap；The bearing shell outer surface is provided with water storage cavity, some through holes of bearing shell radial equipartition, the water storage cavity and gap is connected
It is logical；Intake tunnel is provided with the pump housing, the side of the intake tunnel connects the high-pressure side of multistage pump, and the intake tunnel is another
Side connects water storage cavity；The mechanical seal includes rotating ring and stationary ring, and the second axle sleeve is fixed on pump shaft, and the rotating ring is fixed on
On second axle sleeve, the stationary ring is arranged on seal casinghousing, is set vertically between the non-tight face of the stationary ring and seal casinghousing
There is spring, compressed stationary ring and rotating ring by spring；The sealing surface edge of the stationary ring is provided with radially distributed groove.
Further, the outer surface of first axle sleeve is provided with the first spiral groove, and the inner surface of the bearing shell is provided with
Second spiral groove.
Further, first spiral groove and the second spiral groove are rectangular thread.
Further, the thread rotary orientation of first spiral groove and the hand of spiral of the second spiral groove on the contrary, and
The thread rotary orientation of first spiral groove is opposite with the direction of rotation of pump shaft.
Further, the groove includes crescent and intake chamber, and the crescent and intake chamber are by radially interval is divided successively
Cloth.
Further, the radius R of the crescent is 8~12mm, the groove depth d of the crescent1For 0.5~1.5mm, institute
State the depth L of crescent radially1For 2~4mm.
Further, the width w of the intake chamber is 4~6mm, the groove depth d of the intake chamber2For 0.5~1.5mm.
Further, the depth L of the intake chamber radially2=(1.2~2.0) L1。
The beneficial effects of the present invention are：
1. the shaft sealer of the present invention suitable for HTHP multistage pump, by provided with water storage cavity, duct and
Helicla flute so that the lubricant effect of water lubriucated bearing is more preferable, and leakage is less, and the volumetric loss of pump is less, and on this basis
Leakage can further be reduced by adding non-contacting mechanical seal device.
2. the shaft sealer of the present invention suitable for HTHP multistage pump, by provided with water storage cavity, duct and
Helicla flute so that non-contacting mechanical seal device need not provide outside cooling, can be in no any single cooling water
Run in the case of induction system, can so reduce the cost of installation and operation.
Brief description of the drawings
Fig. 1 is the shaft sealer structural representation of the present invention suitable for HTHP multistage pump.
Fig. 2 is stationary ring groove schematic diagram of the present invention.
Fig. 3 is Fig. 2 A-A sectional views.
Fig. 4 is Fig. 2 B-B sectional views.
In figure：
10- impellers；11- pump shafts；The 12- pump housings；13- seal casinghousings；The spiral grooves of 14- first；20- water lubriucated bearings；
The axle sleeves of 21- first；22- bearing shells；23- keys；24- bolts；25- through holes；26- water storage cavities；The spiral grooves of 27- second；30- machineries
Sealing；The axle sleeves of 31- second；31a- flanges；32- rotating rings；33- stationary rings；34- springs；35- nuts；The pin rods of 36- first；37- second
Pin rod；331- crescents；332- intake chambers.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated, but protection scope of the present invention is simultaneously
Not limited to this.
As shown in figure 1, the shaft sealer of the present invention suitable for HTHP multistage pump, including water lubriucated bearing
20th, mechanical seal 30 and seal casinghousing 13；The seal casinghousing 13 is fixed on the pump housing 12；The water lubriucated bearing 20 is arranged on
Between pump shaft 11 and the pump housing 12, the mechanical seal 30 is arranged between pump shaft 11 and seal casinghousing 13；The water lubriucated bearing
20 include the first axle sleeve 21 and bearing shell 22, and described bearing shell 22 is fixed on the pump housing 12, and the first axle sleeve 21 is radially solid by key 23
It is scheduled on pump shaft 11, by impeller 10 and shaft shoulder axial restraint, bearing shell 22 is fixed on the pump housing 12 by bolt 24；The first axle
Set 21 is provided with gap in bearing shell 22 between first axle sleeve 21 and bearing shell 22；The outer surface of bearing shell 22 is provided with water storage cavity
26, some through holes 25 of the radial equipartition of bearing shell 22, the water storage cavity 26 is connected with gap；Water inlet is provided with the pump housing 12
Passage 15, the high-pressure side of the side connection multistage pump of the intake tunnel 15, the opposite side of intake tunnel 15 connect water storage cavity
26；The mechanical seal 30 is non-contacting mechanical seal, including rotating ring 32 and stationary ring 33, the second axle sleeve 31 are radially fixed by key
On pump shaft 11, pass through the shaft shoulder and the axial restraint of nut 35.Rotating ring 32 is fixed on the flange of the second axle sleeve 31 by the first pin rod 36
On 31a.Stationary ring 33 is arranged on seal casinghousing 13, and stationary ring is circumferentially fixed by the second pin rod 37 on seal casinghousing 13, described
Spring 34 is provided between the non-tight face of stationary ring 33 and seal casinghousing 13 vertically, is pressed stationary ring 33 and rotating ring 32 by spring 34
Tightly；The sealing surface edge of the stationary ring 33 is provided with radially distributed groove.
As shown by the arrows in Figure 1, the liquid form of liquid stream is as follows in shaft sealer, and liquid stream is logical by intaking from high-pressure side
Road 15, water storage cavity 26 and through hole 25, the gap runner between the first axle sleeve 21 and bearing shell 22, and then a part flows forwardly into leaf
10 sides are taken turns, another small part is flowed on the outside of pump back through mechanical seal 30.
As shown in figure 1, the outer surface of first axle sleeve 21 is provided with the first spiral groove 14, the interior table of the bearing shell 22
Face is provided with the second spiral groove 27.The spiral groove 27 of first spiral groove 14 and second is rectangular thread.Institute
The thread rotary orientation of the first spiral groove 14 and the hand of spiral of the second spiral groove 27 are stated on the contrary, and the first spiral groove
14 thread rotary orientation is with the direction of rotation of pump shaft 11 on the contrary, so may insure that small part flows to pump back through mechanical seal 30
Outside.If through hole 25 is flowed on the outside of pump in the axial location of bearing shell 22 close to mechanical seal 30 by mechanical seal 30 in addition
That reveals is less.
As shown in Figure 2, Figure 3 and Figure 4, the groove includes crescent 331 and intake chamber 332, the crescent 331 and enters
Tank 332 by being radially spaced apart successively.The radius R of the crescent 331 is 8~12mm, the groove depth of the crescent 331
d1For 0.5~1.5mm, the depth L of the crescent 331 radially1For 2~4mm.The width w of the intake chamber 332 be 4~
6mm, the groove depth d of the intake chamber 3322For 0.5~1.5mm.The depth L of the intake chamber 332 radially2=(1.2~
2.0)L1。
The embodiment is preferred embodiment of the invention, but the present invention is not limited to above-mentioned embodiment, not
Away from the present invention substantive content in the case of, those skilled in the art can make it is any it is conspicuously improved, replace
Or modification belongs to protection scope of the present invention.
Claims (8)
1. a kind of shaft sealer suitable for HTHP multistage pump, it is characterised in that including water lubriucated bearing (20), machinery
Seal (30) and seal casinghousing (13)；The seal casinghousing (13) is fixed on the pump housing (12)；Water lubriucated bearing (20) peace
Between pump shaft (11) and the pump housing (12), the mechanical seal (30) is arranged between pump shaft (11) and seal casinghousing (13)；
The water lubriucated bearing (20) includes the first axle sleeve (21) and bearing shell (22), and described bearing shell (22) is fixed on the pump housing (12)
On, described the first axle sleeve (21) is fixed on pump shaft (11), and first axle sleeve (21) is located in bearing shell (22), and first axle
Gap is provided between set (21) and bearing shell (22)；Bearing shell (22) outer surface is provided with water storage cavity (26), bearing shell (22) footpath
To uniform some through holes (25), the water storage cavity (26) is connected with gap；Intake tunnel (15) is provided with the pump housing (12),
The high-pressure side of the side connection multistage pump of the intake tunnel (15), intake tunnel (15) opposite side connect water storage cavity
(26)；
The mechanical seal (30) includes rotating ring (32) and stationary ring (33), and the second axle sleeve (31) is fixed on pump shaft (11), described
Rotating ring (32) is fixed on the second axle sleeve (31), and the stationary ring (33) is arranged on seal casinghousing (13), the stationary ring (33)
Spring (34) is provided between non-tight face and seal casinghousing (13) vertically, by spring (34) by stationary ring (33) and rotating ring (32)
Compress；The sealing surface edge of the stationary ring (33) is provided with radially distributed groove.
2. the shaft sealer according to claim 1 suitable for HTHP multistage pump, it is characterised in that described first
The outer surface of axle sleeve (21) is provided with the first spiral groove (14), and the inner surface of the bearing shell (22) is provided with the second spiral shape ditch
Groove (27).
3. the shaft sealer according to claim 2 suitable for HTHP multistage pump, it is characterised in that described first
Spiral groove (14) and the second spiral groove (27) are rectangular thread.
4. the shaft sealer according to claim 2 suitable for HTHP multistage pump, it is characterised in that described first
The thread rotary orientation of spiral groove (14) and the hand of spiral of the second spiral groove (27) are on the contrary, and the first spiral groove
(14) thread rotary orientation is opposite with the direction of rotation of pump shaft (11).
5. the shaft sealer according to claim 1 suitable for HTHP multistage pump, it is characterised in that the groove
Including crescent (331) and intake chamber (332), the crescent (331) and intake chamber (332) by being radially spaced apart successively.
6. the shaft sealer according to claim 5 suitable for HTHP multistage pump, it is characterised in that the crescent moon
The radius R of groove (331) is 8~12mm, the groove depth d of the crescent (331)1For 0.5~1.5mm, the crescent (331)
Depth L radially1For 2~4mm.
7. the shaft sealer according to claim 5 suitable for HTHP multistage pump, it is characterised in that the water inlet
The width w of groove (332) is 4~6mm, the groove depth d of the intake chamber (332)2For 0.5~1.5mm.
8. the shaft sealer according to claim 6 suitable for HTHP multistage pump, it is characterised in that the water inlet
The depth L of groove (332) radially2=(1.2~2.0) L1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710898981.XA CN107676294A (en) | 2017-09-28 | 2017-09-28 | A kind of shaft sealer suitable for HTHP multistage pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710898981.XA CN107676294A (en) | 2017-09-28 | 2017-09-28 | A kind of shaft sealer suitable for HTHP multistage pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107676294A true CN107676294A (en) | 2018-02-09 |
Family
ID=61138504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710898981.XA Pending CN107676294A (en) | 2017-09-28 | 2017-09-28 | A kind of shaft sealer suitable for HTHP multistage pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107676294A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS588295A (en) * | 1981-07-03 | 1983-01-18 | Hitachi Ltd | Two-side suction type spiral pump |
| US6446976B1 (en) * | 2000-09-06 | 2002-09-10 | Flowserve Management Company | Hydrodynamic face seal with grooved sealing dam for zero-leakage |
| CN101603597A (en) * | 2009-06-30 | 2009-12-16 | 张家港市金鹰密封件厂 | The friction ring of mechanical seal device |
| CN202327105U (en) * | 2011-11-09 | 2012-07-11 | 四川日机密封件股份有限公司 | Mechanical sealing device for fixed taper type waveform curved surface |
| CN102588600A (en) * | 2012-02-15 | 2012-07-18 | 浙江工业大学 | Profiled groove end surface non-contact mechanical seal with backflow function |
| CN102828966A (en) * | 2012-09-20 | 2012-12-19 | 兰州理工大学 | Floating submerged fire pump driven by hydraulic motor |
| CN204357927U (en) * | 2014-12-15 | 2015-05-27 | 烟台阳光泵业有限公司 | A kind of active and static pressure mixed type sliding bearing |
| CN106763792A (en) * | 2016-12-28 | 2017-05-31 | 合肥通用机械研究院 | A kind of self-cooling machine sealing arrangement suitable for dry friction operating mode |
-
2017
- 2017-09-28 CN CN201710898981.XA patent/CN107676294A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS588295A (en) * | 1981-07-03 | 1983-01-18 | Hitachi Ltd | Two-side suction type spiral pump |
| US6446976B1 (en) * | 2000-09-06 | 2002-09-10 | Flowserve Management Company | Hydrodynamic face seal with grooved sealing dam for zero-leakage |
| CN101603597A (en) * | 2009-06-30 | 2009-12-16 | 张家港市金鹰密封件厂 | The friction ring of mechanical seal device |
| CN202327105U (en) * | 2011-11-09 | 2012-07-11 | 四川日机密封件股份有限公司 | Mechanical sealing device for fixed taper type waveform curved surface |
| CN102588600A (en) * | 2012-02-15 | 2012-07-18 | 浙江工业大学 | Profiled groove end surface non-contact mechanical seal with backflow function |
| CN102828966A (en) * | 2012-09-20 | 2012-12-19 | 兰州理工大学 | Floating submerged fire pump driven by hydraulic motor |
| CN204357927U (en) * | 2014-12-15 | 2015-05-27 | 烟台阳光泵业有限公司 | A kind of active and static pressure mixed type sliding bearing |
| CN106763792A (en) * | 2016-12-28 | 2017-05-31 | 合肥通用机械研究院 | A kind of self-cooling machine sealing arrangement suitable for dry friction operating mode |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180209 |