CN104421432B - The seal member and sealing system of generator of nuclear power station - Google Patents
The seal member and sealing system of generator of nuclear power station Download PDFInfo
- Publication number
- CN104421432B CN104421432B CN201310381348.5A CN201310381348A CN104421432B CN 104421432 B CN104421432 B CN 104421432B CN 201310381348 A CN201310381348 A CN 201310381348A CN 104421432 B CN104421432 B CN 104421432B
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- Prior art keywords
- ring
- sealing
- generator
- nuclear power
- power station
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
Abstract
The present invention is applied to nuclear power station technical field, disclose a kind of seal member of generator of nuclear power station and the sealing system with the seal member, the seal member is used to stop lubricating oil sliding along alternator shaft axial direction, it includes annular body, the annular body is spliced by several subarc rings, interval is convexly equipped with least three and is used to keep out the oily tooth that lubricating oil slides on the madial wall of the subarc ring, it is located between the two adjacent oily teeth for caching the slow oil groove of parts of lubricating oil and the oleophobic groove of lubricating oil in each slow oil groove being put for dredging ejectment, arc length direction of the oleophobic groove along the subarc ring is recessed on the end face of the subarc ring.In the present invention, the oily number of teeth amount set on single seal member can more than two, slow oil groove quantity can be more than one, so as to effectively increase the quantity of the gentle oil groove of the oily tooth on single seal member, oily effect is kept off beneficial to the sealing for improving seal member, and then effectively reduces the amount into the lubricating oil in generator.
Description
Technical field
The invention belongs to nuclear power station technical field, more particularly to the seal member of a kind of generator of nuclear power station and close with this
Seal the sealing system of part.
Background technology
The sealing system of generator of nuclear power station, generally comprise for isolating outside air and the machine for lubricating oil flow
The sealing tile structure of internal hydrogen, for preventing the outer oil catch structure described in the outflow of lubrication oil on end cap outside generator and being used for
The inner grease retainer structure for preventing the lubricating oil on end cap from entering in the generator, inner grease retainer structure and outer oil catch structure are respectively arranged on
Seal the both sides of tile structure.
Sealing tile structure is mainly used in being flowed thereon for lubricating oil, so, on the one hand can prevent generator
Hydrogen between rotating shaft and generator's cover gap outflow generator outside；On the other hand outside air can be avoided from rotating shaft
The gap of (alternator shaft) between generator's cover enters generator, so as to ensure generator hydrogen_cooling agent
Purity；Another further aspect seals heat caused by tile structure and rotating shaft when can take away operation, to play a part of cooling radiating.Specifically
In, it should ensure that the lubricating oil for flowing through sealing tile structure meets lubricating oil temperature, pressure, flow required for sealing, so as to
Hydrogen pressure (design pressure 0.5Mpa, up to 0.6Mpa) can maintain normal value when the generator is run under various operating modes.
Inner grease retainer structure is mainly used in preventing to enter in generator from the lubricating oil that sealing tile structure upstream goes out.Inner grease retainer knot
Structure generally comprises oil catch back-up ring and sealing ring, the madial wall of sealing ring be provided with two be used to keeping out oily tooth that lubricating oil slides,
It is located between the two adjacent oily teeth for caching the slow oil groove of parts of lubricating oil and drawing for the lubricating oil of slow oil groove to be dredged
Oleophobic groove to inner grease retainer back-up ring oil drain passage.In concrete application, (lubricating oil passes through interior oil to the phenomenon of inner grease retainer structure oil leak
Keep off the phenomenon that structure enters in generator) generally existing, and the lasting presence of inner grease retainer structure oil leakage phenomenon, there is following danger
Evil：1) can be adhered to after lubricating oil is entered between alternator shaft coil and stator core in the form of oil droplet or oil gas in the form of oil film
On coil, winding and iron core, the presence of oil film has had a strong impact on the radiating effect of coil, winding and iron core, so that generating electricity
Local temperature rises in machine, causes the heat ageing of insulating element；2) because lubricating oil inevitably contains micro-moisture, and moisten
Lubricating oil has stronger affinity interaction to oxygen, and in the presence of highfield, oil film aoxidizes, and the peroxide of generation can make insulation
Cellulose oxidation in material causes material embrittlement, and the various acidic materials of generation can improve the conductance of oil film, reduce
The class of insulation of insulating element；3) oil gas and micro-moisture also reduce the purity of hydrogen, and have necessarily to the surface of equipment
Corrosiveness.
How the harm entered based on above-mentioned lubricating oil in generator, reduce the amount into the lubricating oil in generator, and one
It is directly the technical barrier that person skilled needs to capture.In the prior art, in order to reduce the lubricating oil entered in generator
Amount, mainly takes following several technological means schemes：
When the quantity by increasing sealing ring, to reach the mesh for increasing the oily number of teeth amount slided for stopping lubricating oil
, but because inner grease retainer back-up ring is limited along the axial width of rotating shaft, therefore so that it can at most be installed on an inner grease retainer back-up ring
Two sealing rings, so, the quantity of oily tooth also just only four, the quantity of slow oil groove only has two, keeps off oily number and caching is arranged
The number drained the oil does not reach the demand of application scenario, and therefore, it, which keeps off oily effect, can not reach defined requirement；
Second, by increasing the oily number of teeth amount for stopping that lubricating oil slides that on single sealing ring is used for, carry out improving gear oil effect
Fruit, but because sealing ring of the prior art is an overall endless member, therefore, it is used to connect dredging for slow oil groove in processing
During oil groove, the oily tooth of centre can be machined away, therefore, the oily number of teeth amount on the single sealing ring finally processed also only has two
It is individual, so do not reach the purpose for increasing the gentle oil groove quantity of oily number of teeth amount；
Third, the inner grease retainer shaft part of inner grease retainer structure installation and the sealing bearing bush axle for sealing tile structure installation will be supplied in rotating shaft
Section is set to multi-diameter shaft, is Φ 570mm such as by the diameter design of sealing bearing bush shaft part, and is Φ by the diameter design of inner grease retainer shaft part
650mm, and sealing bearing bush shaft part is passed through the Φ 650 that R angles are excessively inner grease retainer shaft part, so, sealing bearing bush discharge by Φ 570mm
Hydrogen side lubricating oil is thrown away after initially encountering R fillets, then stops sliding for lubricating oil, but its gear oil by the sealing ring of inner grease retainer structure
Effect can not also reach defined requirement.
The content of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, there is provided the seal member of generator of nuclear power station and
Sealing system with the seal member, it aims to solve the problem that the technology how reduced into the amount of the lubricating oil in generator is asked
Topic.
The technical scheme is that：A kind of seal member of generator of nuclear power station, for stopping lubricating oil along generator
Rotating shaft axial direction is slided, including annular body, the annular body are spliced by several subarc rings, the subarc ring it is interior
In side wall interval be convexly equipped with least three be used to keeping out oily tooth that lubricating oil slides, be located in the two adjacent oily teeth between be used for
Cache the slow oil groove of parts of lubricating oil and the oleophobic groove of lubricating oil in each slow oil groove, the oleophobic groove edge are put for dredging ejectment
The arc length direction of the subarc ring is recessed on the end face of the subarc ring.
Preferably, two points of recessed depth of the oleophobic groove on the subarc ring end face less than the subarc ring arc length
One of.
Specifically, the oleophobic groove is T-shaped, and it includes being used for the connectivity slot section for connecting each slow oil groove and along the ring
Shape body radially runs through groove section from what the connectivity slot section bottom extended through the subarc ring lateral wall.
Preferably, axial direction of multiple oily teeth along the rotating shaft is equidistantly located at the madial wall of the subarc ring
On, the slow oil groove of sandwiched one between any two adjacent oily tooth.
The seal member of generator of nuclear power station provided by the invention, by the way that annular body is arranged to by several subarc rings
It is spliced, and makes arc length direction of the oleophobic groove along the subarc ring recessed on the end face of the subarc ring, due to oleophobic groove
And not through the arc length direction of each subarc ring, therefore so that the middle oily tooth (oil except the oily tooth in two, axial direction both ends
Tooth) still keep being connected with subarc ring entity.In oily number of teeth amount more than two, the processing of oleophobic groove will not machine away the oil of centre
Tooth so that the oily number of teeth amount set on subarc ring can more than two, delaying oil groove quantity can be more than one, i.e., single sealing
The oily number of teeth amount set on part can more than two, delaying oil groove quantity can be more than one, and then effectively increases single seal member
On oily tooth ease up the quantity of oil groove, keep off oily effect beneficial to the sealing for improving seal member.
Further, present invention also offers a kind of sealing system of generator of nuclear power station, generated electricity for sealing nuclear power station
Machine rotating shaft and the fit clearance of end cap, including for the lubricating oil on prevention end cap between the end cap and the rotating shaft
Into the inner grease retainer structure in the generator, the inner grease retainer structure includes being fixedly connected with the end cap and has oil drain passage
Inner grease retainer back-up ring and the first sealing ring for being installed on the inner grease retainer back-up ring madial wall；First sealing ring is using above-mentioned
Generator of nuclear power station seal member.
Preferably, first sealing ring is provided with two, between axial direction of two first sealing rings along the rotating shaft
Every on the madial wall located at the inner grease retainer back-up ring.
Further, in the inner grease retainer back-up ring towards on the end face on the outside of the generator, being fixedly provided with for keeping out
And dredge the oil scraper ring for drawing parts of lubricating oil.
Specifically, the oil scraper ring is spliced by upper half subring and lower half subring, in the upper half subring described in
On the end face of inner grease retainer back-up ring, also it is convexly equipped with and drops to the rotating shaft for the lubricating oil for preventing from being thrown in the upper half subring
Half shield ring.
Specifically, the upper half subring is fixed on the inner grease retainer back-up ring by the first fastening assembly, the lower half son
Ring is fixed on the inner grease retainer back-up ring by the second fastening assembly.
Preferably, first fastening assembly includes the bolt with nut, runs through in the upper half subring and offers confession
The first through hole that the bolt is worn, the inner grease retainer back-up ring are provided with the first screwed hole being equipped with the bolt.
Preferably, second fastening assembly includes studs and nut, and the studs includes middle shoulder section
With the first stud section, the second stud section for being respectively arranged on the middle shoulder section both sides, the inner grease retainer back-up ring is provided with and institute
The second screwed hole that the first stud section is equipped with is stated, runs through to offer wearing in the lower half subring for the second stud section
The second through hole, the second stud section connects the nut through second through hole whorl.
Preferably, the axial width of the middle shoulder section is equal to the axial width of half shield ring.
Preferably, the nut is round nut, and second fastening assembly also includes being used to lock stopping for the round nut
Washer, the stop washer are located between the nut and the lower half subring.
Specifically, the inner grease retainer back-up ring is provided with the mounting groove for first sealing ring insertion installation.
More specifically, the mounting groove is T-shaped, the lateral wall of first sealing ring is correspondingly provided with the pluggable installation
The T-shaped installation portion of groove, first sealing ring are locked in the mounting groove by elastic component.
Specifically, one end of the elastic component is fixedly connected with the T-shaped installation portion of first sealing ring, and the other end prolongs
Stretch and be resisted against on the inwall of the mounting groove.
Further, in addition to it is used for for lubricating oil flow to isolate the sealing of outside air and hydrogen in the generator
Tile structure, the sealing tile structure is annular in shape, and its lateral wall is fixedly connected with the end cap, and madial wall is sheathed in the rotating shaft,
And the sealing tile structure is provided with the oil supply gallery for lubricating oil flow to gap between its madial wall and the rotating shaft.
Specifically, the sealing tile structure includes being fixedly connected with the end cap and has the sealing bearing bush seat of cavity, located at institute
State the sealing bearing bush in sealing bearing bush seat cavity and for the sealing bearing bush to be fixed in the fixation in the sealing bearing bush seat cavity
Plate.
Further, in addition to for preventing the outer oil catch structure described in the outflow of lubrication oil on end cap outside generator, institute
Sealing tile structure is stated to be located between the inner grease retainer structure and the outer oil catch structure.
Specifically, the outer oil catch structure include be fixedly connected the end cap and with oil drain passage outer oil catch back-up ring and
The second sealing ring being installed on the outer oil catch back-up ring madial wall.
The sealing system of generator of nuclear power station provided by the invention, because the first sealing ring employs above-mentioned sealing
Part, so oily number of teeth amount on single first sealing ring can be made to can be set more than two, slow oil groove quantity can be set it is more than one,
So, inner grease retainer structure is on the one hand effectively increased to lube shaft to the stop number slided, so as to improve inner grease retainer knot
The sealing of structure keeps off oily effect；On the other hand effectively increase inner grease retainer structure to lubricating oil cache discharge number, add by
Slow oil groove caching is emitted into the amount of the lubricating oil in oleophobic groove, so as to effectively reduce the lubricating oil axially slided along rotating shaft
Amount, and then can reach the purpose for the amount for reducing the lubricating oil entered in generator.Generator of nuclear power station provided by the invention it is close
Envelope system, lubricating oil is effectively reduced into the amount in generator, ensure that the security reliability of generator of nuclear power station operation.
Brief description of the drawings
Fig. 1 is inner grease retainer structure provided in an embodiment of the present invention and the assembling schematic diagram of rotating shaft；
Fig. 2 is the structural representation of the sealing system of generator of nuclear power station provided in an embodiment of the present invention；
Fig. 3 is the structural representation of subarc ring provided in an embodiment of the present invention；
Fig. 4 is the structural representation of oil scraper ring provided in an embodiment of the present invention；
Fig. 5 is the structural representation of studs provided in an embodiment of the present invention；
Fig. 6 is the assembling schematic diagram of sealing tile structure provided in an embodiment of the present invention and rotating shaft.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in FIG. 1 to 3, the seal member of generator of nuclear power station provided in an embodiment of the present invention, lubricated for stopping
Oil is slided along the axial direction of alternator shaft 2, including annular body, annular body are spliced by several subarc rings 120, subarc
Interval is convexly equipped with least three and is used to keeping out oily tooth 121 that lubricating oil slides, is located in two adjacent oily teeth on the madial wall of ring 120
It is used to cache the slow oil groove 122 of parts of lubricating oil between 121 and the oleophobic groove of lubricating oil in each slow oil groove 122 is put for dredging ejectment
123, arc length direction of the oleophobic groove 123 along subarc ring 120 is recessed, and in the end face of subarc ring 120, (end face of a sub- arc ring 120 is
The end face being engaged for it with adjacent subarc ring 120).Signified radial direction is the diameter side of pivoting part in the embodiment of the present invention
To axial direction is the centre of gyration direction of principal axis of pivoting part.In concrete application, generator of nuclear power station provided in an embodiment of the present invention
Seal member using wearability preferably, the material of good corrosion resistance be made, such as copper product.Oleophobic groove 123 on subarc ring 120
It can be process by milling machine, when specifically processing, first subarc ring 120 can be installed on the fixture of milling machine, then with milling machine
End face of the milling cutter along subarc ring 120 mills out oleophobic groove 123.The seal member of generator of nuclear power station provided in an embodiment of the present invention,
By the way that annular body to be arranged to be spliced by several subarc rings 120, and make arc length of the oleophobic groove 123 along subarc ring 120
Direction is recessed on the end face of subarc ring 120, due to oleophobic groove 123 and not through the arc length direction of each subarc ring 120, therefore,
So that middle oily tooth 121 (the oily tooth 121 except the oily tooth 121 in two, axial direction both ends) is still kept and the entity of subarc ring 120
It is connected.In oily 121 quantity more than two of tooth, the processing of oleophobic groove 123 will not machine away the oily tooth 121 of centre, so that
The quantity of oily tooth 121 set on subarc ring 120 can more than two, delaying oil groove 122 quantity can be more than one, i.e., single seal member
The quantity of oily tooth 121 of upper setting can more than two, delaying oil groove 122 quantity can be more than one, and then effectively increases single sealing
Oily tooth 121 on part eases up the quantity of oil groove 122, and oily effect is kept off beneficial to the sealing for improving seal member.
Preferably, recessed depth of the oleophobic groove 123 on the end face of subarc ring 120 be less than the arc length of subarc ring 120 two/
One, so, it can effectively ensure that oleophobic groove 123 does not run through the lonely ring 120 of son along arc length direction, so as to not have middle oil tooth 121
Have by mill off, and then can effectively realize that the single seal member quantity of tooth 121 that oils is eased up the increase of oil groove 122 quantity.It is more excellent
Selection of land, recessed depth of the oleophobic groove 123 on the end face of subarc ring 120 are less than a quarter of the arc length of subarc ring 120.It is more highly preferred to
Ground, oleophobic groove 123 is simply slightly concave on the end face of subarc ring 120, i.e. the recessed depth very little of oleophobic groove 123, so that
The middle oil tooth 121 (subarc ring 120 along the oily tooth 121 except the oily tooth 121 in two, 2 axial direction both ends of rotating shaft) of subarc ring 120
Simply one section of end very little is in state is hollowed out, and so, the lubricating oil in each slow oil groove 122 of guarantee can pass through the row of oleophobic groove 123
It on the premise of putting, can effectively simplify the design process of oleophobic groove 123, and the solid and reliable property of middle oil tooth 121 can be ensured.
In concrete application, the recessed depth of oleophobic groove 123 can be 10mm or 5mm or smaller.
Preferably, it is spliced into the planform size all same of each subarc ring 120 of seal member, i.e. each subarc ring 120
Arc length, inner ring radius, the parameter such as outer shroud radius it is equal.Preferably, seal member is spelled by 12 pieces of identical subarc rings 120
Connect and form.Of course, the quantity of subarc ring 120 for being spliced into seal member is alternatively other numerical value, can be according to tool in concrete application
Body processing cost etc. optimizes design.
Specifically, as shown in figures 1 and 3, oleophobic groove 123 is T-shaped, and it includes being used for the connection for connecting each slow oil groove 122
Groove section 1231 and radially run through groove section from what the bottom of connectivity slot section 1231 extended through the lateral wall of subarc ring 120 along annular body
1232.Width of the connectivity slot section 1231 along the axial direction of rotating shaft 2 is more than and runs through width of the groove section 1232 along the axial direction of rotating shaft 2.
Width of the connectivity slot section 1231 along the axial direction of rotating shaft 2 should be designed to it is sufficiently large, to ensure that it is same that connectivity slot section 1231 can connect
Each slow oil groove 122 on subarc ring 120, and then the lubricating oil of each slow oil groove 122 on same subarc ring 120 is flowed into the son
The connectivity slot section 1231 of arc ring 120；And through the design of groove section 1232, it need to only ensure through groove section 1232 and connectivity slot section 1231
Connect and extend through the lateral wall of subarc ring 120, therefore will, set through width of the groove section 1232 along the axial direction of rotating shaft 2
It is calculated as being less than width of the connectivity slot section 1231 along the axial direction of rotating shaft 2, so, can effectively simplifies through the processed of groove section 1232
Journey, and then improve processing efficiency.
Preferably, as shown in FIG. 1 to 3, the quantity of oily tooth 121 set on each subarc ring 120 is five, each subarc
The quantity of slow oil groove 122 set on ring 120 is four, and axial direction of five oily teeth 121 along rotating shaft 2 is equidistantly located at subarc
On the madial wall of ring 120, the slow oil groove 122 of sandwiched one between any two adjacent oily tooth 121.So, considerably increase single close
The quantity of the gentle oil groove 122 of the quantity of oily tooth 121 sealed on part, so as to considerably increase seal member to flowing through its lubricating oil
Stop number and caching discharge number, and then greatly reduce the leakage rate of the lubricating oil at seal member sealing, effectively protect
Stable and reliable operation and the security reliability of generator are demonstrate,proved.Of course, without departing from seal member along the axial direction of rotating shaft 2
Width on the premise of, the quantity of oily tooth 121 on single seal member can also be other numerical value, such as three or four or six
Or seven etc., it can optimize design according to real needs and design processing cost etc. in concrete application.
Further, the embodiment of the present invention additionally provides a kind of sealing system of generator of nuclear power station, for sealing nuclear power
Stand the fit clearance of alternator shaft 2 and end cap 5, including for preventing the profit on end cap 5 between end cap 5 and rotating shaft 2
The inner grease retainer structure 1 that lubricating oil enters in generator, inner grease retainer structure 1 include being fixedly connected with end cap 5 and have the interior of oil drain passage
Oil catch back-up ring 11 and the first sealing ring 12 being installed on the madial wall of inner grease retainer back-up ring 11；First sealing ring 12 uses above-mentioned core
The seal member of power station generator.Because the first sealing ring 12 employs above-mentioned seal member, so can make single first close
The quantity of oily tooth 121 in seal ring 12 can be set more than two, and the slow quantity of oil groove 122 can be set more than one, so, on the one hand have
Effect adds inner grease retainer structure 1 to lube shaft to the stop number slided, so as to improve the sealing of inner grease retainer structure 1 gear oil
Effect；On the other hand the number that inner grease retainer structure 1 caches discharge to lubricating oil is effectively increased, adds and is delayed by slow oil groove 122
The amount for the lubricating oil being emitted into oleophobic groove 123 is deposited, so as to effectively reduce the amount of the lubricating oil axially slided along rotating shaft 2, is entered
And it can reach the purpose for the amount for reducing the lubricating oil entered in generator.The sealing system of generator of nuclear power station provided by the invention
System, lubricating oil is effectively reduced into the amount in generator, ensure that the reliability and safety of generator of nuclear power station operation
Reliability.
Preferably, as depicted in figs. 1 and 2, the inwall of an inner grease retainer back-up ring 11 is provided with two the first sealing rings 12, and two
Axial direction interval of first sealing ring 12 along rotating shaft 2 is on the madial wall of inner grease retainer back-up ring 11.It is to be appreciated that pass through increasing
Add the oily tooth 121 on single first sealing ring 12 ease up oil groove 122 quantity can be achieved increase to lubricating oil along rotating shaft 2 axially
The stop number and thin ejectment slided puts number, still, when the oily tooth 121 on single first sealing ring 12 eases up oil groove 122
When quantity is excessive, the design process of the first sealing ring 12 can be made more complicated, so as to increase the processing system of the first sealing ring 12
Make difficulty.The present embodiment, the first sealing ring 12 are arranged to two, and the oily tooth 121 that on the one hand can be effectively increased inner grease retainer structure 1 counts
The gentle quantity of oil groove 122 of amount, so as to increase the stop number and dredge that inner grease retainer structure 1 axially slides to lubricating oil along rotating shaft 2
Number is put in ejectment, and then can effectively reduce the amount of the lubricating oil entered from inner grease retainer structure 1 in generator；On the other hand increasing
The oily quantity of tooth 121 is eased up on the premise of oil groove 122 quantity, can prevent due to single first sealing ring 12 the quantity of oily tooth 121 and
The slow quantity of oil groove 122 excessively causes the single structure of first sealing ring 12 excessively complicated, so as to the design beneficial to the first sealing ring 12
Processing；Another further aspect because the first sealing ring 12 can be floated with rotating shaft 2, therefore, the first sealing ring 12 is arranged to two, can make
The radial floating amplitude of different oily teeth 121 on two the first sealing rings 12 difference (radial direction of first sealing ring 12
Float big, the radial floating of another the first sealing ring 12 is small), and then beneficial to improving inner grease retainer structure 1 to lubricating oil along rotating shaft 2
The blocking effect axially slided.Of coursing, the first sealing ring 12 also can only set one, or in the width of inner grease retainer back-up ring 11 foot
The first sealing ring 12 may also set up two or more, such as three in the case of reaching greatly.
Specifically, as shown in FIG. 1 to 3, inner grease retainer back-up ring 11 is provided with the installation for the insertion installation of the first sealing ring 12
Groove 111.Preferably, mounting groove 111 is T-shaped, and the lateral wall of the first sealing ring 12 is correspondingly provided with the T in pluggable mounting groove 111
Shape installation portion 124, the first sealing ring 12 are locked in mounting groove 111 by elastic component (not shown).Inner grease retainer back-up ring 11
An overall endless member is spliced into by two half-ring shield ring (not shown), subarc ring 120 can be along the arc length direction of half-ring shield ring
From the end face of half-ring shield ring, insertion is installed in the mounting groove 111 of inner grease retainer back-up ring 11.The radial direction of T-shaped mounting groove 111 is (along interior oil
Keep off the diametric(al) of back-up ring 11) highly it is more than radial direction (along the diametric(al) of the first sealing ring 12) height of T-shaped installation portion 124,
So, it may be such that the first sealing ring 12 can produce certain radial floating after being installed on inner grease retainer back-up ring 11.Pass through elastic component
The T-shaped installation portion 124 of first sealing ring 12 can be pressed in the T-shaped mounting groove 111 of inner grease retainer back-up ring 11, and when rotating shaft 2 goes out
During existing circular runout, the first sealing ring 12 can be floated with the bounce of rotating shaft 2, so as to effectively prevent the first sealing ring 12
The scratch rotating shaft 2 of oily tooth 121 surface or rotating shaft 2 damage, touch the oily tooth 121 of disconnected first sealing ring 12.
Specifically, one end of elastic component is fixedly connected with the T-shaped installation portion 124 of the first sealing ring 12, and other end extension is supported
In on the inwall of mounting groove 111.In concrete application, elastic component can be shell fragment or spring.
Further, as depicted in figs. 1 and 2, it is fixedly provided with inner grease retainer back-up ring 11 towards on the end face on the outside of generator
Draw the oil scraper ring 13 of parts of lubricating oil for keeping out and dredging.Oil scraper ring 13 can be made of aluminium.It passes through in inner grease retainer back-up ring
11 towards an oil scraper ring 13 is set up on the end face on the outside of generator, can effectively reduce the lubrication with the gap of rotating shaft 2 into oily tooth 121
The amount of oil, so as to effectively reduce the amount into the lubricating oil in generator.
Specifically, as shown in Figure 1 and Figure 4, oil scraper ring 13 is spliced by upper half subring 131 and lower half subring 132, Yu Shang
Half subring 131 is also convexly equipped with the lubrication oil droplet for preventing from being thrown in upper half subring 131 towards on the end face of inner grease retainer back-up ring 11
Drop down onto half shield ring 14 in rotating shaft 2.Upper half subring 131 and lower half subring 132 can enclose after being installed on inner grease retainer back-up ring 11
Into the oil scraper ring 13 of a complete loop, and upper half subring 131 is located at the top in the axle center of rotating shaft 2, and lower half subring 132 is located at rotating shaft 2
The lower section in axle center.Half shield ring 14 can be integrally formed design processing with upper half subring 131；Also can be by half shield ring 14 and upper half son
Ring 131 is divided to separately design processing for two independent parts after, then linked together by welding manner.Half shield ring 14 is set
Put, on the one hand can make to form certain gap between upper half subring 131 and inner grease retainer back-up ring 11, so as to be beneficial to make parts of lubricating oil
Discharged in into the gap；On the other hand because half shield ring 14 is continuous hemizonid, i.e. upper half subring 131 and inner grease retainer
Gap between back-up ring 11 is in closed, so, drops to the lubricating oil in gap between upper half subring 131 and inner grease retainer back-up ring 11
Flowing drippage can only be carried out along the top surface of half shield ring 14, upper half subring 131 is dropped down onto so as to prevent from getting rid of from rotating shaft 2
The lubricating oil in gap is directly dropped in rotating shaft 2 between inner grease retainer back-up ring 11, and then can be reduced along the oil catch axially inwards of rotating shaft 2
The amount for the lubricating oil that structure 1 slides.
Preferably, the inner wall edge of upper half subring 131 and lower half subring 132 be through in crimping handle or fillet processing and
Into smooth segmental arc, so, when rotating shaft 2 is vibrated, even if the interior of upper half subring 131 and lower half subring 132 is touched in rotating shaft 2
Wall, rotating shaft 2 also will not be by upper half subrings 131 and the inner wall edge scratch of lower half subring 132.It is highly preferred that the He of upper half subring 131
At least provided with 0.5mm spacing between the inner wall edge of lower half subring 132 and rotating shaft 2.
Specifically, as shown in figure 1, upper half subring 131 is fixed on inner grease retainer back-up ring 11 by the first fastening assembly 15, under
Half subring 132 is fixed on inner grease retainer back-up ring 11 by the second fastening assembly 16.Upper half subring 131 and lower half subring 132 are point
It is not mounted on inner grease retainer back-up ring 11.First fastening assembly 15 and the second fastening assembly part 16 are equipped with multiple and more
Individual first fastening assembly 15 and multiple second fastening assembly parts 16 are along the circumferential direction uniformly spacedly distributed, and so, can make each
One fastening assembly 15 and the stress of the second fastening assembly part 16 are more uniform.
Specifically, as shown in Figure 1 and Figure 4, the first fastening assembly 15 includes the bolt 151 with nut, upper half subring 131
Upper to run through the first through hole 141 for offering and being worn for bolt 151, inner grease retainer back-up ring 11 is provided with what is be equipped with bolt 151
First screwed hole.During specific installation, bolt 151 is through first through hole 141 and is threadedly coupled the first screwed hole, so as to effectively real
Existing being locked on inner grease retainer back-up ring 11 of upper half subring 131.
Further, as shown in figure 1, the first fastening assembly 15 also includes packing ring 152, packing ring 152 be located in nut with it is upper
Between half subring 131.Packing ring 152 is the combination of faced washer or faced washer and elastic washer, the setting of packing ring 152, mainly
For expanding the contact area between the nut of bolt 151 and upper half subring 131, so as to prevent nut in upper half subring 131
Upper extrusion impression.
Specifically, as shown in Figure 1, Figure 4 and Figure 5, the second fastening assembly 16 includes studs 161 and nut 162, double
Header stud 161 includes middle shoulder section 1613 and is respectively arranged on the first stud section 1611, second of the middle both sides of shoulder section 1613
Stud section 1612, inner grease retainer back-up ring 11 are provided with the second screwed hole being equipped with the first stud section 1611, lower half subring 132
Upper to run through the second through hole 1321 for offering and being worn for the second stud section 1612, the second stud section 1612 passes through the second through hole 1321
Threaded coupling nut 162.The setting of middle shoulder section 1613, on the one hand can make between lower half subring 132 and inner grease retainer back-up ring 11
With certain spacing, so that the end after being installed on beneficial to guarantee upper half subring 131 and lower half subring 132 on inner grease retainer back-up ring 11
Face is more smooth；On the other hand because multiple studs 161 are spaced, so so that lower half subring 132 and inner grease retainer
Gap between back-up ring 11 is in open, so as to beneficial to getting rid of the lubricating oil that falls from rotating shaft 2 and dripped along the bottom of half shield ring 14
Lubricating oil can be between lower half subring 132 and inner grease retainer back-up ring 11 gap instill generator collector tubing in.
Preferably, the axial width of middle shoulder section 1613 is equal to the axial width of half shield ring 14, so, can make upper half
End face after subring 131 and lower half subring 132 are installed on inner grease retainer back-up ring 11 is more smooth, so as to beneficial to can by half shield ring 14
It flow between the gap of lower half subring 132 and inner grease retainer back-up ring 11.
Preferably, nut 162 is round nut 162, and the second fastening assembly 16 also includes the stop for stripped nut 162
Packing ring 163, stop washer 163 are located between nut 162 and lower half subring 132.Round nut 162 and stop washer 163 are matched somebody with somebody
Close and set, fastening reliability of the round nut 162 in the second stud section 1612 can be effectively improved, and then improve lower half subring 132
The solid and reliable property installed on inner grease retainer back-up ring 11.
Further, as shown in Figure 2 and Figure 6, the sealing system of generator of nuclear power station provided in an embodiment of the present invention, is also wrapped
Include the sealing tile structure 33 for isolating outside air and hydrogen in generator for lubricating oil flow.Preferably, in order that hair
Hydrogen will not meet and gather with outside air in motor, and sealing tile structure 33 is using double-current ring sealing tile structure 33.Double-current ring
Sealing tile structure 33 specific work process be：Pressure lubrication oil enters alternator shaft 2 and sealing tile structure from different oil grooves
Behind gap between 33, discharged respectively to hydrogen gas side and air side in the opposite direction so that hydrogen gas side (on the inside of generator) and
Air side is completely separable (on the outside of generator), and then can effectively ensure that the security reliability of sealing.
Specifically, as shown in Figure 2 and Figure 6, tile structure 33 is sealed annularly, its lateral wall is fixedly connected with end cap 5, madial wall
It is sheathed in rotating shaft 2, and seals tile structure 33 provided with the fuel feeding for lubricating oil flow to gap between its madial wall and rotating shaft 2
Passage.
Specifically, as shown in Figure 2 and Figure 6, sealing tile structure 33 includes being fixedly connected with end cap 5 and the sealing bearing bush with cavity
Seat 32, the sealing bearing bush 31 in the cavity of sealing bearing bush seat 32 and for sealing bearing bush 31 to be fixed in the cavity of sealing bearing bush seat 32
Fixed plate 33.Sealing bearing bush seat 32 can be screwed connection end cap 5, and fixed plate 33 can be screwed connection sealing bearing bush
Seat 32.The centre of sealing bearing bush 31 offers the axis hole being equipped with alternator shaft 2.During specific installation, sealing bearing bush 31, sealing
Watt seat 32 and holding plate composition are a ring-type global facility, and the ring-type global facility is set in generating by the upper shaft hole of sealing bearing bush 31
It is then by support ring, screw etc. that the ring-type being made up of sealing bearing bush 31, sealing bearing bush seat 32 and holding plate is whole in the rotating shaft 2 of machine
Body component is locked on generator's cover 5.Between sealing bearing bush 31 and alternator shaft 2, the side of sealing bearing bush 31 and sealing
Closely gap is used to keeping sealing bearing bush 31 circumferential and the pressure film of radial direction between watt seat 32.In order to establish suitable pressure oil
Film, the radial clearance between sealing bearing bush 31 and alternator shaft 2 are generally located between 0.35-0.38mm, the side of sealing bearing bush 31
Between axial gap between sealing bearing bush seat 32 is generally located on 0.20~0.26mm, so, sealing bearing bush 31 is in sealing bearing bush seat
Can be with radial and axial floating in 32.And in order to prevent sealing bearing bush 31 as alternator shaft 2 rotates together, in sealing bearing bush seat 32
The general stop pin (not shown) being also equiped with for limiting the rotation of sealing bearing bush 31.
Further, as shown in Fig. 2 the sealing system of generator of nuclear power station provided in an embodiment of the present invention, in addition to use
Outer oil catch structure 4 outside the outflow of lubrication oil generator prevented on end cap 5, sealing tile structure 33 are located at the He of inner grease retainer structure 1
Between outer oil catch structure 4.
Specifically, as shown in Fig. 2 outer oil catch structure 4 includes being fixedly connected with end cap 5 and the outer oil catch with oil drain passage is kept off
Circle 41 and the second sealing ring 42 being installed on the outer madial wall of oil catch back-up ring 41.The setting of second sealing ring 42 can effectively be realized outer
Oil catch structure 4 and the radial seal of rotating shaft 2, and then can effectively prevent from sealing outside the outflow of lubrication oil generator on tile structure.Outside
The setting of oil catch back-up ring 41, it is mainly used in realizing that installation of the outer oil catch structure 4 on end cap 5 is fixed, and can effectively supports second
Sealing ring 42.
Specifically, as depicted in figs. 1 and 2, the rotating shaft 2 of generator of nuclear power station is multi-diameter shaft, inner grease retainer structure 1, sealing bearing bush
Structure and outer oil catch structure 4 are respectively arranged on the shaft part that diameter is different between three.For the ease of description, by inner grease retainer structure
The shaft part of rotating shaft 2 of 1 installation is referred to as the first shaft part 21, and the shaft part of rotating shaft 2 for sealing tile structure installation is referred to as into the second shaft part 22, will be outer
The shaft part of rotating shaft 2 that oil catch structure 4 is installed is referred to as the 3rd shaft part 23.The both ends of second shaft part 22 connect the first shaft part 21 and respectively
Three shaft parts 23, and the diameter of the first shaft part 21 and the diameter of the 3rd shaft part 23 are all higher than the diameter of the second shaft part 22, so, can prevent
The lubricating oil only flowed out by sealing tile structure is directly got rid of to inner grease retainer structure 1 and outer oil catch structure 4.First shaft part 21 and second
The transition position of shaft part 22 is round-corner transition, so, can extend the transition length of the first shaft part 21 and the second shaft part 22, and then be beneficial to
Improve the amount that lubricating oil is kept out by the transition position of the first shaft part 21 and the second shaft part 22.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modification, equivalent substitution or improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (19)
- A kind of 1. seal member of generator of nuclear power station, for stopping lubricating oil sliding along alternator shaft axial direction, including ring Shape body, it is characterised in that：The annular body is spliced by several subarc rings, is spaced on the madial wall of the subarc ring Be convexly equipped with least three be used to keeping out oily tooth that lubricating oil slides, be located in the two adjacent oily teeth between shared in the benefit for buffer unit The slow oil groove of lubricating oil and the oleophobic groove that lubricating oil in each slow oil groove is put for dredging ejectment, the oleophobic groove is along the subarc ring Arc length direction it is recessed on the end face of the subarc ring, affiliated oleophobic groove includes being used for the connectivity slot for connecting each slow oil groove Section and radially run through groove section, institute from what the connectivity slot section bottom extended through the subarc ring lateral wall along the annular body State the half that recessed depth of the oleophobic groove on the subarc ring end face is less than the subarc ring arc length.
- 2. the seal member of generator of nuclear power station as claimed in claim 1, it is characterised in that：The oleophobic groove is T-shaped.
- 3. the seal member of generator of nuclear power station as claimed in claim 1, it is characterised in that：Multiple oily teeth turn along described The axial direction of axle is equidistantly located on the madial wall of the subarc ring, between any two adjacent oily tooth described in sandwiched one Slow oil groove.
- A kind of 4. sealing system of generator of nuclear power station, for the fit clearance of sealing nuclear power station alternator shaft and end cap, bag Include located at the inner grease retainer entered between the end cap and the rotating shaft for the lubricating oil on prevention end cap in the generator Structure, the inner grease retainer structure include being fixedly connected with the end cap and have the inner grease retainer back-up ring of oil drain passage and be installed on described The first sealing ring on inner grease retainer back-up ring madial wall, it is characterised in that：First sealing ring uses claims 1 to 3 such as to appoint The seal member of generator of nuclear power station described in one.
- 5. the sealing system of generator of nuclear power station as claimed in claim 4, it is characterised in that：First sealing ring is provided with two Individual, axial direction interval of two first sealing rings along the rotating shaft is on the madial wall of the inner grease retainer back-up ring.
- 6. the sealing system of generator of nuclear power station as claimed in claim 4, it is characterised in that：In the inner grease retainer back-up ring direction On end face on the outside of the generator, it is fixedly provided with and draws the oil scraper ring of parts of lubricating oil for keeping out and dredging.
- 7. the sealing system of generator of nuclear power station as claimed in claim 6, it is characterised in that：The oil scraper ring is by upper half subring It is spliced with lower half subring, in the upper half subring towards on the end face of the inner grease retainer back-up ring, being also convexly equipped with for preventing Half shield ring that the lubricating oil being thrown in the upper half subring is dropped in the rotating shaft.
- 8. the sealing system of generator of nuclear power station as claimed in claim 7, it is characterised in that：The upper half subring passes through first Fastening assembly is fixed on the inner grease retainer back-up ring, and the lower half subring is fixed on the inner grease retainer by the second fastening assembly and kept off On circle.
- 9. the sealing system of generator of nuclear power station as claimed in claim 8, it is characterised in that：First fastening assembly includes Bolt with nut, through offering the first through hole that is worn for the bolt, the inner grease retainer gear in the upper half subring Circle is provided with the first screwed hole being equipped with the bolt.
- 10. the sealing system of generator of nuclear power station as claimed in claim 8, it is characterised in that：The second fastening assembly bag Studs and nut are included, the studs includes middle shoulder section and is respectively arranged on the first of the middle shoulder section both sides Stud section, the second stud section, the inner grease retainer back-up ring are provided with the second screwed hole being equipped with the first stud section, institute The second through hole for running through in lower half subring and offering and being worn for the second stud section is stated, the second stud section is logical through described second Hole is threadedly coupled the nut.
- 11. the sealing system of generator of nuclear power station as claimed in claim 10, it is characterised in that：The axle of the middle shoulder section It is equal to the axial width of half shield ring to width.
- 12. the sealing system of generator of nuclear power station as claimed in claim 10, it is characterised in that：The nut is round nut, Second fastening assembly also includes being used for the stop washer for locking the round nut, and the stop washer is located in the nut Between the lower half subring.
- 13. the sealing system of generator of nuclear power station as claimed in claim 4, it is characterised in that：Set on the inner grease retainer back-up ring There is the mounting groove for first sealing ring insertion installation.
- 14. the sealing system of generator of nuclear power station as claimed in claim 13, it is characterised in that：The mounting groove is T-shaped, institute The lateral wall for stating the first sealing ring is correspondingly provided with the T-shaped installation portion of the pluggable mounting groove, and first sealing ring passes through bullet Property part is locked in the mounting groove.
- 15. the sealing system of generator of nuclear power station as claimed in claim 14, it is characterised in that：One end of the elastic component is consolidated Surely the T-shaped installation portion of first sealing ring is connected, other end extension is resisted against on the inwall of the mounting groove.
- 16. the sealing system of generator of nuclear power station as claimed in claim 4, it is characterised in that：Also include being used to supply lubricating oil Flowing is to isolate the sealing tile structure of outside air and hydrogen in the generator, and the sealing tile structure is annular in shape, its outside Wall is fixedly connected with the end cap, and madial wall is sheathed in the rotating shaft, and the sealing tile structure is provided with and supplies lubricating oil flow To the oil supply gallery in gap between its madial wall and the rotating shaft.
- 17. the sealing system of generator of nuclear power station as claimed in claim 16, it is characterised in that：The sealing tile structure includes It is fixedly connected with the end cap and with the sealing bearing bush seat of cavity, the sealing bearing bush in the sealing bearing bush seat cavity and for by institute Sealing bearing bush is stated to be fixed in the fixed plate in the sealing bearing bush seat cavity.
- 18. the sealing system of generator of nuclear power station as claimed in claim 16, it is characterised in that：Also include being used to prevent end cap On outflow of lubrication oil described in outer oil catch structure outside generator, the sealing tile structure is located at the inner grease retainer structure and described Between outer oil catch structure.
- 19. the sealing system of generator of nuclear power station as claimed in claim 18, it is characterised in that：The outer oil catch structure includes Be fixedly connected with the end cap and outer oil catch back-up ring with oil drain passage and be installed on the outer oil catch back-up ring madial wall the Two sealing rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310381348.5A CN104421432B (en) | 2013-08-21 | 2013-08-21 | The seal member and sealing system of generator of nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310381348.5A CN104421432B (en) | 2013-08-21 | 2013-08-21 | The seal member and sealing system of generator of nuclear power station |
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| CN104421432A CN104421432A (en) | 2015-03-18 |
| CN104421432B true CN104421432B (en) | 2017-11-21 |
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| CN201310381348.5A Active CN104421432B (en) | 2013-08-21 | 2013-08-21 | The seal member and sealing system of generator of nuclear power station |
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| CN110350737B (en) * | 2019-05-24 | 2021-07-02 | 中广核工程有限公司 | Mounting method of sealing device of nuclear power generator |
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| CN201554501U (en) * | 2009-10-30 | 2010-08-18 | 华北电力大学（保定） | Non-contact type steam turbine steam seal structure |
| CN201774350U (en) * | 2010-08-27 | 2011-03-23 | 常州大道机械有限公司 | Generator sealing oil system |
| CN104279329A (en) * | 2013-07-02 | 2015-01-14 | 苏州热工研究院有限公司 | Oil catch |
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| US6550777B2 (en) * | 2001-06-19 | 2003-04-22 | General Electric Company | Split packing ring segment for a brush seal insert in a rotary machine |
| JP5299150B2 (en) * | 2009-07-30 | 2013-09-25 | 株式会社日立プラントテクノロジー | Centrifugal compressor |
| CN102184747B (en) * | 2011-03-18 | 2013-02-06 | 山东核电设备制造有限公司 | Modular steel containment vessel annular hanging beam and assembling method thereof |
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|---|---|---|---|---|
| CN2470603Y (en) * | 2001-03-07 | 2002-01-09 | 骆义根 | Multi-spline oil-scraper ring |
| CN2717099Y (en) * | 2004-06-08 | 2005-08-10 | 董乃芬 | Hydrogen cooling generator |
| CN201162712Y (en) * | 2008-07-24 | 2008-12-10 | 上海电力修造总厂有限公司 | Novel oil deflector |
| CN201554501U (en) * | 2009-10-30 | 2010-08-18 | 华北电力大学（保定） | Non-contact type steam turbine steam seal structure |
| CN201774350U (en) * | 2010-08-27 | 2011-03-23 | 常州大道机械有限公司 | Generator sealing oil system |
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| CN104421432A (en) | 2015-03-18 |
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