CN109185220A - A kind of lubrication of nuclear power main pump and sealing system and its implementation - Google Patents
A kind of lubrication of nuclear power main pump and sealing system and its implementation Download PDFInfo
- Publication number
- CN109185220A CN109185220A CN201811201298.7A CN201811201298A CN109185220A CN 109185220 A CN109185220 A CN 109185220A CN 201811201298 A CN201811201298 A CN 201811201298A CN 109185220 A CN109185220 A CN 109185220A
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- China
- Prior art keywords
- ring
- pressure
- lubrication
- electromagnetism
- lubricant
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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
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings 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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- 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
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention discloses a kind of lubrications of nuclear power main pump and sealing system and its implementation, stationary ring is arranged in the system on axis, rotating ring, auxiliary seal ring, throw-out collar, electromagnetism iron hoop, electromagnetism ring seat, key, pressure sensor, lubricant pipeline and displacement sensor, electromagnetism iron hoop is forwarded to by Centralized Controller calculated current signal, by adjusting the electromagnetic force between electric current two groups of electromagnetism rings of control, whole system is set to keep pressure balance, then the fuel supply signal after calculating is passed to nitrogen cylinder by Centralized Controller, pass through nitrogen cylinder output pressure again and pressure is passed into lubricant reservoir, lubricant is filled into the endface of stationary ring and rotating ring under the effect of the pressure, lubrication end face is set to remain full of lubricant.The present invention expands the pressure scope of application of mechanical seal and extends service life, and more refines to sealing control.
Description
Technical field
The invention belongs to take into account the bindiny mechanism of lubrication and sealing, and in particular to a kind of lubrication of nuclear power main pump and sealing are
System and its implementation.
Background technique
Nuclear power main pump is the equipment uniquely continuously run in one loop of nuclear power station main system, is the heart of nuclear power station, in order to
Ensure the safety and environmental issue of nuclear power station, it is highest that reactor coolant pump should meet leakage rate minimum, operating reliability
It is required that.
Nuclear power main pump hydrodynamic three-stage mechanical seal device is the important of core the most in reactor coolant pump structure
Can component part, direct relation core main pump safe and reliable run in nuclear power station.If sealing leaks, will directly lead
Reactor shutdown is caused, brings huge economic losses to nuclear power station, also will cause environmental radiation pollution when serious.In recent years with nuclear power
Technology is greatly developed, and the relevant technologies of a large amount of nuclear power generating equipments are all gradually mature, and main pump and its axle envelope still have some difficulties
To solve the problems, such as, it has also become the bottleneck of nuclear power technology development.
Current existing nuclear power main pump hydrodynamic three-stage mechanical seal device is by the identical mechanical seal string of tertiary structure
Multi pack is pressed, and seal assembly is mounted on axle sleeve in mechanical seal, and cavity is mounted on outside seal assembly and by spring base pressure
Tightly, the axle sleeve of adjacent machine sealing is connected with each other, and clamps hub form by both ends and Motor torque is passed to axle envelope.It is existing
The connection type of spring and bellows is used in mechanically-sealing apparatus, i.e. spring base connects throw-out collar by spring or bellows,
And throw-out collar is driven to rotate, and throw-out collar drives rotating ring to rotate again, the abrasion of spring and bellows is be easy to cause in such sealing means,
And spring and bellows generate power and are difficult to real-time control.
Summary of the invention
Goal of the invention: being directed to above-mentioned defect existing in the prior art and deficiency, and the present invention provides a kind of nuclear power main pump
Lubrication and sealing system and its implementation, the system have good seal performance, the lubrication suitable for differential responses heap main pump
With mechanical seal, the method also has wide applicability.
Technical solution: a kind of lubrication and sealing system of nuclear power main pump, including stationary ring, rotating ring, auxiliary seal ring, push away
Ring, the first electromagnetism iron hoop, the second electromagnetism iron hoop, electromagnetism ring seat, key, pressure sensor, lubricant pipeline, displacement sensor, collection
Middle controller, nitrogen cylinder and lubricant reservoir are provided with pressure sensor, lubricant pipeline and displacement sensing on the stationary ring
Device, the pressure sensor and displacement sensor acquisition data signal transmission arrive Centralized Controller, the lubricant pipeline and
Lubricant reservoir connection, lubricant reservoir are connect with nitrogen cylinder, and nitrogen cylinder is connect with Centralized Controller, the pressure sensor,
Displacement sensor, the DC power supply of the second electromagnetism iron hoop and Centralized Controller are electrically connected；The throw-out collar is connected by key with axis, throw-out collar
Both ends the first electromagnetism ring and rotating ring are installed respectively；The electromagnetism ring seat is arranged on axis by bolt, and electromagnetism ring seat is used for
Second electromagnetism ring is set.
Further, the mating surface of the rotating ring and axis is equipped with auxiliary seal ring；
Further, lubricant is filled in the lubricant pipeline, the viscosity of lubricant is 320mm2/s—460mm2/s；
Further, conducting wire is wound in first electromagnetism ring and the second electromagnetism ring, the number of turns of conducting wire is 1000~1500
Circle；
Further, the sheathing material of first electromagnetism ring and the second electromagnetism ring is copper.
A kind of lubrication of nuclear power main pump and the implementation method of sealing system, the method take into account sealing and lubrication, and including
Sealing and the dynamic equilibrium of lubrication control, the pressure change for being sealed into Centralized Controller while receiving pressure sensor transmission
Current signal after calculating is forwarded to the second electromagnetism ring by the change in displacement signal of signal and displacement sensor, Centralized Controller,
By adjusting the electromagnetic force between the first electromagnetism ring of size of current control, the second electromagnetism ring, whole system is made to keep pressure balance.
Further, the fuel supply signal after calculating is passed to nitrogen cylinder by Centralized Controller by the lubrication, then passes through nitrogen
Pressure is simultaneously passed to lubricant reservoir by gas cylinder output pressure, and lubricant is filled into stationary ring and rotating ring under the effect of the pressure
Endface, make lubricate end face remain full of lubricant.
Further, the Centralized Controller receives pressure change signal and change in displacement signal, while exporting electric current
Signal and air pressure signal, system keep hydrldynamic pressure lubrication balance.
The utility model has the advantages that compared with prior art, the significant effect of the present invention is: first, the present invention is replaced using electromagnet
For spring or bellows, electromagnetic force can be controlled by the change of electric current, thus be whole system holding pressure balance, and
And the pressure limit that electromagnet generates is greater than the elastic force range of spring and bellows, therefore the pressure for increasing mechanical seal is applicable in
Range, it can the sealing device is made to bear pressure more higher than general spring and bellows mechanical seal.Second, use electromagnet
Abrasion can be avoided contact with to avoid the contact between equipment component instead of spring, to increase the service life that equipment uses.The
Three, which receives pressure change signal, change in displacement signal by Centralized Controller and passes through control current signal and air pressure
Fuel supply signal has reached central controlled effect, so that the sealing control more precise treatment of nuclear power main pump.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is electromagnetism ring structure of the present invention and magnetic schematic diagram.
Specific embodiment
In order to which technical solution disclosed by the invention is described in detail, done with reference to the accompanying drawings of the specification with specific embodiment into
The elaboration of one step.
As shown in Figure 1, the lubrication and sealing system of a kind of nuclear power main pump, including stationary ring 1, rotating ring 2, auxiliary seal ring 3,
Throw-out collar 4, the first electromagnetism ring 501, the second electromagnetism ring 502, electromagnetism ring seat 6, key 7, pressure sensor 8, lubricant pipeline 9, displacement
Sensor 10, Centralized Controller 11, nitrogen cylinder 12 and lubricant reservoir 13.Specifically, first in the outer setting of nuclear power main pump
Stationary ring 1 is provided with pressure sensor 8, lubricant pipeline 9 and displacement sensor 10 in stationary ring 1, and pressure sensor 8 is for detecting
1 stress size of stationary ring, displacement sensor 10 for detect stationary ring 1 be rotating ring 2 contact be pass to the pressure of stationary ring 1, and
The deformation generated under pressure propulsion, that is, be displaced, the data of pressure sensor 8 and displacement sensor 10, which are acquired and monitored, to be promoted
Into the pressure balance of entire sealing system and its control of degree of lubrication.At the contact surface position of stationary ring 1 and rotating ring 2, due to
Rotating ring 21 is equipped with lubricant pipeline 9, lubricant pipeline 9 and lubricant reservoir 13 because rotation needs to lubricate, therefore on stationary ring
It being connected by pipeline, by piping connection, nitrogen cylinder 12 is electrically connected with Centralized Controller 11 for lubricant reservoir 13 and nitrogen cylinder 12,
Including controlling the pressure in nitrogen cylinder 12 by necessary device and its equipment.
Control aspect, pressure sensor 8, displacement sensor 10,502 DC power supply of the second electromagnetism ring are all connected to concentration control
Device 11 processed, Centralized Controller 11 acquires two data informations of pressure sensor 8 and displacement sensor 10, then according to this two
Data information is decision making, and control conveys on corresponding electric current to the second electromagnetism ring 502, and the first electromagnetism ring 501 is located at the second electricity
The side of magnet ring 502, and the first electromagnetism ring 501 and the second electromagnetism ring 502 use like pole, as shown in Figure 1, Centralized Controller
11 control the electric current of the second electromagnetism ring 502 according to the data information of pressure sensor 8 and displacement sensor 10, because of electric current difference meeting
Different size of magnetic force is generated, the first electromagnetism ring 501 further promotes rotation therefore also by the repulsive force for corresponding to size to the left
Change 2, and then different pressure and displacement can be also generated for stationary ring 1, pressure sensor 8 and 10 data of displacement sensor are inevitable
Can change, the data information of variation is constantly transferred to Centralized Controller 11, Centralized Controller 11 take in turn different reply and
Signal output.The magnetic distribution of first electromagnetism ring 501 and the second electromagnetism ring 502 is as shown in Figure 2.
Throw-out collar 4 is connected by key 7 to be connected with axis, and the first electromagnetism ring 501 and rotating ring 2 are installed in the both ends of throw-out collar 4 respectively；
Electromagnetism ring seat 6 is bolted on axis, and the second electromagnetism ring 502 is housed in electromagnetism ring seat 6.Rotating ring 2 is set with axis mating surface
There is auxiliary seal ring 3, the viscosity of lubricant is 320mm2/s—460mm2/s；In first electromagnetism ring 501 and the second electromagnetism ring 502
Wind conducting wire, the number of turns of conducting wire is 1000~1500 circles, the first electromagnetism ring 501, the second electromagnetism ring 502 sheathing material be copper.
Control for whole system, Centralized Controller 11 receives simultaneously to be believed by the pressure change that pressure sensor 8 transmits
Number and displacement sensor 10 transmit change in displacement signal；Current signal after calculating is forwarded to the second electricity by Centralized Controller 11
Magnet ring 502, by adjust electric current control the second electromagnetism ring 502 and the first electromagnetism ring 501 between electromagnetic force, make entirely be
Blanket insurance holds pressure balance.Lubrication aspect, Centralized Controller 11 also carry out calculating sum number according to pressure size and displacement simultaneously
Table is corresponded to according to analysis, including setting pressure, displacement and lubrication relationship, different letters is provided according to different pressure or displacement
Number.Fuel supply signal after calculating is passed to nitrogen cylinder 12 by Centralized Controller 11, then is passed through 12 output pressure of nitrogen cylinder and will be pressed
Power passes to lubricant reservoir 13, and lubricant is filled into the endface of stationary ring 1 Yu rotating ring 2 under the effect of the pressure, makes to moisten
Sliding end face remains full of lubricant, and specific rate-determining steps are as follows:
The first step tests out each numerical value when whole system operating reaches kinetic pressure balancing,
PD0--- the pressure of sealing ring end face when operating reaches kinetic pressure balancing；Unit MP；
D0--- operating distance, i.e. liquid film of the lubricating fluid between sealing ring between sealing ring end face when reaching kinetic pressure balancing
Thickness；Unit mm；
PG0--- loine pressure when operating reaches kinetic pressure balancing；Unit MP；
I0--- operating reaches current strength when kinetic pressure balancing；Unit A；
Second step；When seal face pressure increases,
PD1--- Centralized Controller receives end force signal；
PD1—PD0=△ PD--- the pressure change signal after calculating；The pressure of seal face increases at this time, i.e. sealing fluid
The pressure that film is born increases.When liquid film, which bears pressure, to be increased, electromagnetic force can be reduced, thus less end by smaller current I
The pressure in face, end force reduce then sealing ring end clearance and increase.At this moment by increasing the pressure of pipeline, increase lubricant
Loading makes end face full of lubricant, and keeps kinetic pressure balancing.
In the lubrication and sealing system of nuclear power main pump of the present invention, the balance control of dynamic pressure is to concentrate control
Device 11 processed, Centralized Controller 11 has data processing and analysis ability, including outputs and inputs, the function of Centralized Controller 11
And structure is existing apparatus, including the use of computer or the control module of chip microcontroller, this will not be repeated here.Art technology
The technical solution that personnel provide according to the present invention is implemented or is tested, the result shows that the system lubrication effect and leakproofness are equal
Well, it is better than the prior art, and widely applicable.
Claims (8)
1. the lubrication and sealing system of a kind of nuclear power main pump, including stationary ring (1), rotating ring (2), auxiliary seal ring (3), throw-out collar
(4), the first electromagnetism iron hoop (501), the second electromagnetism iron hoop (502), electromagnetism ring seat (6), key (7), pressure sensor (8), lubrication
Agent pipeline (9), displacement sensor (10), Centralized Controller (11), nitrogen cylinder (12) and lubricant reservoir (13), feature exists
In: pressure sensor (8), lubricant pipeline (9) and displacement sensor (10) are provided on the stationary ring (1), the pressure passes
Sensor (8) and displacement sensor (10) acquisition data signal transmission arrive Centralized Controller (11), the lubricant pipeline (9) and
Lubricant reservoir (13) connection, lubricant reservoir (13) are connect with nitrogen cylinder (12), nitrogen cylinder (12) and Centralized Controller (11)
Connection, the pressure sensor (8), displacement sensor (10), the second electromagnetism iron hoop (502) DC power supply and centralized control
Device (11) is electrically connected；The throw-out collar (4) is connected by key (7) with axis, and the first electromagnetism ring (501) are installed at the both ends of throw-out collar (4) respectively
With rotating ring (2)；The electromagnetism ring seat (6) is arranged on axis by bolt, and electromagnetism ring seat (6) is for being arranged the second electromagnetism ring
(502)。
2. the lubrication and sealing system of a kind of nuclear power main pump according to claim 1, it is characterised in that: the rotating ring (2)
Auxiliary seal ring (3) are equipped with the mating surface of axis.
3. the lubrication and sealing system of a kind of nuclear power main pump according to claim 1, it is characterised in that: the lubricant pipeline
(9) lubricant is filled in, the viscosity of lubricant is 320mm2/s—460mm2/s。
4. the lubrication and sealing system of a kind of nuclear power main pump according to claim 1, it is characterised in that: first electromagnetism ring
(501) with winding conducting wire in the second electromagnetism ring (502), the number of turns of conducting wire is 1000-1500 circle.
5. the lubrication and sealing system of a kind of nuclear power main pump according to claim 4, it is characterised in that: first electromagnetism ring
(501) and the sheathing material of the second electromagnetism ring (502) is copper.
6. a kind of lubrication of nuclear power main pump and the implementation method of sealing system, it is characterised in that: the method combines lubrication
And sealing, including dynamic equilibrium control, the pressure for being sealed into Centralized Controller (11) while receiving pressure sensor (8) transmission
The change in displacement signal of power variable signal and displacement sensor (10), Centralized Controller (11) pass on the current signal after calculating
The second electromagnetism ring (502) are given, by adjusting the electricity between size of current control the first electromagnetism ring (501), the second electromagnetism ring (502)
Magnetic force makes whole system keep pressure balance.
7. the implementation method of a kind of lubrication of nuclear power main pump and sealing system according to claim 6, it is characterised in that: described
Lubrication is passed to the fuel supply signal after calculating nitrogen cylinder (12) by Centralized Controller (11), then exports gas by nitrogen cylinder (12)
It presses and passes to pressure lubricant reservoir (13), lubricant is filled into stationary ring (1) and rotating ring (2) under pressure
Endface, lubrication end face remain full of lubricant.
8. the implementation method of a kind of lubrication of nuclear power main pump and sealing system according to claim 6, it is characterised in that: described
Centralized Controller (11) receives pressure change signal and change in displacement signal, while output current signal and air pressure signal, system
Keep hydrldynamic pressure lubrication balance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811201298.7A CN109185220A (en) | 2018-10-16 | 2018-10-16 | A kind of lubrication of nuclear power main pump and sealing system and its implementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811201298.7A CN109185220A (en) | 2018-10-16 | 2018-10-16 | A kind of lubrication of nuclear power main pump and sealing system and its implementation |
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| Publication Number | Publication Date |
|---|---|
| CN109185220A true CN109185220A (en) | 2019-01-11 |
Family
ID=64945239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811201298.7A Pending CN109185220A (en) | 2018-10-16 | 2018-10-16 | A kind of lubrication of nuclear power main pump and sealing system and its implementation |
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| Country | Link |
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| CN (1) | CN109185220A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065767A (en) * | 2020-08-19 | 2020-12-11 | 北京航天石化技术装备工程有限公司 | Centrifugal pump magnetic sealing system suitable for high-temperature, high-pressure and non-clean working conditions |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6220602B1 (en) * | 1998-04-17 | 2001-04-24 | Rolls-Royce Plc | Seal arrangement |
| CN101493147A (en) * | 2009-02-24 | 2009-07-29 | 中国船舶重工集团公司第七一二研究所 | Rotating seal |
| CN103430001A (en) * | 2011-03-14 | 2013-12-04 | Skf公司 | Sensorized sealing system |
| CN103711912A (en) * | 2014-01-09 | 2014-04-09 | 中国石油大学(华东) | Closed-loop control type magnetic levitation fluid dynamic seal device |
| CN204042007U (en) * | 2014-01-09 | 2014-12-24 | 中国石油大学(华东) | A kind of closed-loop control type magnetic levitation fluid dynamic seal device |
| CN104390012A (en) * | 2014-11-04 | 2015-03-04 | 南京工业大学 | Mechanical sealing device for magnetofluid lubricating and adaptive sealing control method |
| CN206329739U (en) * | 2016-12-15 | 2017-07-14 | 江苏大学 | A kind of seal clearance control system of non-contact mechanical seal |
| CN208885608U (en) * | 2018-10-16 | 2019-05-21 | 江苏澳润新材料有限公司 | A kind of lubrication and sealing system of nuclear power main pump |
-
2018
- 2018-10-16 CN CN201811201298.7A patent/CN109185220A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6220602B1 (en) * | 1998-04-17 | 2001-04-24 | Rolls-Royce Plc | Seal arrangement |
| CN101493147A (en) * | 2009-02-24 | 2009-07-29 | 中国船舶重工集团公司第七一二研究所 | Rotating seal |
| CN103430001A (en) * | 2011-03-14 | 2013-12-04 | Skf公司 | Sensorized sealing system |
| CN103711912A (en) * | 2014-01-09 | 2014-04-09 | 中国石油大学(华东) | Closed-loop control type magnetic levitation fluid dynamic seal device |
| CN204042007U (en) * | 2014-01-09 | 2014-12-24 | 中国石油大学(华东) | A kind of closed-loop control type magnetic levitation fluid dynamic seal device |
| CN104390012A (en) * | 2014-11-04 | 2015-03-04 | 南京工业大学 | Mechanical sealing device for magnetofluid lubricating and adaptive sealing control method |
| CN206329739U (en) * | 2016-12-15 | 2017-07-14 | 江苏大学 | A kind of seal clearance control system of non-contact mechanical seal |
| CN208885608U (en) * | 2018-10-16 | 2019-05-21 | 江苏澳润新材料有限公司 | A kind of lubrication and sealing system of nuclear power main pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065767A (en) * | 2020-08-19 | 2020-12-11 | 北京航天石化技术装备工程有限公司 | Centrifugal pump magnetic sealing system suitable for high-temperature, high-pressure and non-clean working conditions |
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