CN105114631B - Shaft end sealing device and fluid conveying equipment - Google Patents
Shaft end sealing device and fluid conveying equipment Download PDFInfo
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- CN105114631B CN105114631B CN201510486270.2A CN201510486270A CN105114631B CN 105114631 B CN105114631 B CN 105114631B CN 201510486270 A CN201510486270 A CN 201510486270A CN 105114631 B CN105114631 B CN 105114631B
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- stationary ring
- flushing
- sealing device
- hole
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Abstract
The invention provides a shaft end sealing device and fluid conveying equipment. The shaft end sealing device comprises a moving ring and a static ring, and is further provided with a gland used for fixing the static ring, and a hold-down ring, wherein the hold-down ring is located at the inner side of the gland; an annular flushing fluid cavity is encircled among the gland, the hold-down ring and the static ring; a flushing hole communicated with the flushing fluid cavity is formed in the gland; a static ring flushing hole communicated with the flushing fluid cavity is formed in the static ring; the static ring flushing hole drains a flushing fluid in the flushing fluid cavity to the outer sides of the sealing end surfaces of the moving ring and the static ring. By forming the flushing fluid cavity, the flushing fluid cavity can be fully filled with the flushing fluid through the flushing hole, and the end surface of the static ring encircling the flushing fluid cavity is always soaked by the flushing fluid, so that the heat transferred from the sealing end surfaces of the moving ring and the static ring is rapidly reduced, and a cooling effect for the moving ring and the static ring is improved; and moreover, the flushing fluid flows through the interior of the static ring to take away heat at the static ring flushing hole.
Description
Technical field
The invention belongs to technical field of mechanical, and in particular to a kind of axle end sealing device and have the shaft end seal
The conveying equipment for fluid substances of device.
Background technology
The conventional single end face contacting mechanical seal of the conveying equipment for fluid substances such as the pump of petroleum chemical industry, compressor is used as shaft end
Sealing device.Conveying equipment for fluid substances seals fluid media (medium) by axle end sealing device, and the fluid media (medium) for being sealed has certain
Seal pressure.Axle end sealing device relies primarily on the seal face of dynamic and static ring and is brought into close contact realization sealing, and rotating ring is together with rotating shaft
Rotation, stationary ring is fixed with housing, and in conveying equipment for fluid substances running, the seal face of dynamic and static ring produces a large amount of frictional heats.
In order to cool down the seal face of dynamic and static ring, dynamic and static ring is cooled down by injecting flushing liquor, from pump discharge from punching
The outer flushing liquor of washing liquid or outside directly radially squeezes into annular seal space from the single flushing hole of axle end sealing device, rinses dynamic and static
The outside of the seal face of ring, plays certain cooling and cleaning action；But flush points are single, flushing is insufficient, especially
It is poor for the cooling effect of stationary ring, for the stationary ring part near flushing hole has preferable cooling effect, but away from flushing
The stationary ring part cooling effect in hole is poor；Thus cooling effect is undesirable, it is too high that temperature can occur in the seal face of dynamic and static ring,
The even failure mode such as chipping, eccentric wear.Meanwhile, current flushing liquor directly squeezes into annular seal space, due to seal intracavity have it is certain
Sealed medium pressure, and the flushing liquor limited pressure squeezed into so that flushing liquor is not high into the mobility after annular seal space, causes cold
But effect is relatively low；And the flushing direction of flushing liquor is square with the axis so that the ability for washing away impurity is not high, and cleaning effect is bad,
Can there is the Problem of Failure that medium is caused in the seal face of dynamic and static ring；Thus current axle end sealing device service life it is short,
Change frequent, both labor intensive financial resources, had a strong impact on the normal operation of whole set process device again.
The content of the invention
The present invention provides a kind of axle end sealing device, and being that solution flushing liquor cooling effect of the prior art is bad asks
Topic, improves sealing property and service life.
For reaching above-mentioned technical purpose, the present invention employs the following technical solutions realization：
A kind of axle end sealing device, is arranged at the end of rotating shaft, has including rotating ring, stationary ring, the rotating ring and stationary ring respectively
There are the relative ring seal end face for reclining and stationary ring seal face, the axle end sealing device also has for fixing the stationary ring
Gland and hold-down ring, the hold-down ring is located at the inner side of the gland, the gland, surrounds annular between hold-down ring and stationary ring
Flushing sap cavity, offer on the gland and rinse the flushing hole that is connected of sap cavity with described, offer on the stationary ring and institute
State and rinse the stationary ring flushing hole that is connected of sap cavity, the stationary ring flushing hole by the flushing liquor of flushing liquor intracavity be drained to it is described it is dynamic,
The outside of stationary ring seal face.
Further, the circumferentially spaced about of the stationary ring is provided with multiple stationary ring flushing holes.
Further, on the circumference of the stationary ring, uniform intervals are provided with multiple stationary ring flushing holes.
Further, 4 ~ 16 stationary ring flushing holes are set on the stationary ring.
Further, after the axle end sealing device is installed to the rotating shaft, when the rotating shaft rotates, the flushing
Liquid is entered from the flushing hole and rinses sap cavity, reaches the dynamic and static ring seal face after flowing through multiple stationary ring flushing holes afterwards
Outside；And cause micro thermal deformation on stationary ring seal face so that hot fluid dynamic pressure effect is produced between dynamic and static ring seal face
Should.
Further, the stationary ring includes the sealing with the stationary ring seal face and by the sealing
End stretches out the fixed part to be formed, and the stationary ring flushing hole is opened on the fixed part.
Further, with the axial direction part with the diameter parallel of the stationary ring, the axial direction part will for the stationary ring flushing hole
Flushing liquor is drained to the outside of the dynamic and static ring seal face.
Further, the stationary ring flushing hole also has the radial section positioned at the stationary ring radial direction.
Further, the axial direction part is outer more than or equal to the sealing apart from the minimum range of the stationary ring axis
Radius.
Further, the diameter of the outer surface with diameter greater than the sealing of the outer surface of the rotating ring, the rotating ring
End face outer radius are provided with 30 ° ~ 45 ° of fillet surface.
Further, described gland one end is provided with the baffle ring for extending internally, and is provided with what is stretched out on the stationary ring
Fixed part, the baffle ring, fixed part, hold-down ring are brought into close contact successively.
Further, external diameter of the internal diameter of the stationary ring more than the rotating shaft, when the axle end sealing device is installed to institute
The back pressure cavity of annular after stating rotating shaft, is surrounded between the stationary ring, hold-down ring and the rotating shaft, is had to back pressure intracavity injection
The back pressure medium of certain pressure, for reducing the pressure differential at the dynamic and static ring seal face internal-and external diameter.
Further, the back pressure hole being connected with the back pressure cavity is offered on the hold-down ring.
Further, offer on the gland with the back pressure hole to the introduction hole for connecting.
Further, the end of the back pressure hole is provided with reaming, the reaming is connected with the introduction hole, the expansion
The diameter with diameter greater than the back pressure hole in hole, the diameter with diameter greater than the introduction hole of the reaming.
Further, axle end sealing device also includes transmission ring, the rotating ring of the fixation rotating ring fixed with the rotating shaft
Seat, and the corrugated tube of the transmission ring and rotating seat is tightly connected, the corrugated tube has helical fissure；When the shaft end
After sealing device is installed to the rotating shaft, when the rotating shaft rotates, the corrugated tube is driven to rotate together, outside the corrugated tube
The fluid media (medium) of side is in the presence of helical fissure pumping with the movement tendency away from the rotating ring.
Further, there is after the corrugated tube is installed certain pre compressed magnitude.
Further, shift fork is provided with the transmission ring, offer and match with the shift fork on the rotating seat
Notch, the end of the shift fork are located in the notch.
Further, the shift fork is the cambered surface coaxial with the transmission ring, the corresponding central angle of the cambered surface is 15 ° ~
40°。
Further, the radial thickness of the shift fork is 3mm ~ 5mm.
Further, relative two shift fork is provided with the transmission ring.
Further, stop pin is provided between the stationary ring and the hold-down ring.
Further, graphite gasket is provided between the stationary ring and the hold-down ring.
Further, O-ring is provided between the hold-down ring and the gland.
Based on a kind of above-mentioned axle end sealing device, the present invention also provides a kind of conveying equipment for fluid substances, including housing, is located at
Fluid media (medium) and rotating shaft in the housing, the shaft end of the rotating shaft are provided with above-mentioned axle end sealing device, the gland
Fix on the housing, the hold-down ring is pressed on the stationary ring on the gland.
The axle end sealing device that the present invention is provided, by arranging by the gland, surrounding annular between hold-down ring and stationary ring
Flushing sap cavity so that flushing liquor can be filled to flushing liquor intracavity by flushing hole so that surround rinse sap cavity stationary ring end
Face is all the time in the immersion of flushing liquor so that the heat that driven, stationary ring seal face is passed over quickly is reduced, and it is right to improve
In the cooling effect of dynamic and static ring；And offer on the stationary ring and the stationary ring flushing hole that sap cavity is connected is rinsed with described, make
Flushing liquor is flowed through, further improve the cooling effect of flushing liquor；Finally,
The flushing liquor of flushing liquor intracavity is drained to the outside of the dynamic and static ring seal face for the stationary ring flushing hole so that flushing liquor
The outside of dynamic and static ring seal face is rinsed, is played a part of to cool and is cleaned.
After the specific embodiment of the present invention is read in conjunction with the accompanying, the other features and advantages of the invention will become more clear
Chu.
Description of the drawings
Fig. 1 is the structural representation of one embodiment of axle end sealing device proposed by the invention；
Fig. 2 is the mplifying structure schematic diagram of a-quadrant in Fig. 1；
Fig. 3 is the mplifying structure schematic diagram of part-structure in Fig. 1；
Fig. 4 is the structural representation after corrugated tube is fixed with transmission ring；
Fig. 5 is the structural representation of the transmission ring of B-B direction section view in Fig. 4；
Structural representations of the Fig. 6 for corrugated tube；
Structural representations of the Fig. 7 for stationary ring；
Cross section structure diagrams of the Fig. 8 for Fig. 7.
Specific embodiment
For making purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described.
In describing the invention, it should be noted that defining term：With the direction of the axis near axle end sealing device
For " interior ", with the direction of the axis away from axle end sealing device as " outward ", and the orientation of instruction such as term "left", "right" or
Position relationship is based on position relationship shown in the drawings；Term is for only for ease of the description present invention and simplifies description, rather than
The device or element for indicating or implying indication must have specific orientation, with specific azimuth configuration and operation, therefore can not
It is interpreted as limitation of the present invention.
Refering to Fig. 1 to Fig. 8, it is one embodiment of axle end sealing device proposed by the invention, a kind of shaft end seal dress
The end of the rotating shaft 10 for conveying equipment for fluid substances is put, there is conveying equipment for fluid substances housing 20, the fluid in housing 20 to be situated between
Matter and rotating shaft 10, axle end sealing device are used for sealing the fluid media (medium) in conveying equipment for fluid substances.
Axle end sealing device includes rotating ring 1, stationary ring 2, and for fixing the gland 3 and hold-down ring 4 of stationary ring 2；Hold-down ring 4
Hold-down ring on the inside of gland 3, rotating ring 1 and stationary ring 2 have the relative ring seal end face 11 for reclining and stationary ring sealing respectively
End face 21.Wherein, the flushing sap cavity 5 of annular is surrounded between gland 3, hold-down ring 4 and stationary ring 2, is offered and flushing on gland 3
Sap cavity 5 and the external world are rinsed in the flushing hole 31 that sap cavity 5 is connected, the connection of flushing hole 31, offer and rinse sap cavity 5 on 2 stationary rings
The stationary ring flushing hole 22 being connected, and stationary ring flushing hole 22 is drained to ring seal end face by the flushing liquor in sap cavity 5 is rinsed
11 and the outside of stationary ring seal face 21.
In the present embodiment, referring to shown in Fig. 1 to Fig. 3, ring is surrounded by arranging by between gland 3, hold-down ring 4 and stationary ring 2
The flushing sap cavity 5 of shape；After axle end sealing device is installed to rotating shaft 10 so that can be by flushing hole 31 into flushing sap cavity 5
Fill flushing liquor so that the stationary ring end face for surrounding flushing sap cavity is in the immersion of flushing liquor all the time so that driven torus sealed end
The heat that face 11 and stationary ring seal face 21 are passed over quickly is reduced, and is improve for the cooling effect of rotating ring 1 and stationary ring 2；
And offer on stationary ring 2 and rinse the stationary ring flushing hole 22 that sap cavity 5 is connected so that flushing liquor is flowed through will inside stationary ring 2
Heat at stationary ring flushing hole 22 is taken away, and further improves the cooling effect of flushing liquor；Finally, stationary ring flushing hole 22 is by flushing liquor
Flushing liquor in chamber 5 is drained to the outside of ring seal end face 11 and stationary ring seal face 21 so that flushing liquor is to ring seal
The outside of end face 11 and stationary ring seal face 21 is rinsed, and plays a part of to cool and cleans.
In some embodiments of the invention, it is in order to further improve cooling and cleaning effect, shown in Figure 7, quiet
The circumferentially spaced about of ring 2 is provided with multiple stationary ring flushing holes 22；So that flushing liquor flow through it is multiple spaced quiet inside stationary ring 2
Heat at ring flushing hole 22 is taken away, and improves cooling effect；And to the outer of ring seal end face 11 and stationary ring seal face 21
Side forms multi-point flushing, is favorably improved the cooling effect and cleaning for ring seal end face 11 and stationary ring seal face 21
Effect；And as flushing liquor flows through multiple spaced stationary ring flushing holes 22 inside stationary ring 2 so that in stationary ring seal face
Cause Light deformation on 21 so that between ring seal end face 11 and stationary ring seal face 21, produce hot fluid dynamic pressure effect；Also
21 heat of stationary ring seal face for being proximate to stationary ring flushing hole 22 is taken away in time so that temperature is slightly lower, away from stationary ring flushing hole
22 21 temperature of stationary ring seal face is slightly higher, and as stationary ring flushing hole 22 is in the circumferentially spaced about setting of stationary ring 2, so that
Temperature on stationary ring seal face 21 on end face circumferencial direction into height fluctuation status, according to principle of expanding with heat and contracting with cold so that quiet
Ring seal face 21 produces micro thermal deformation, forms circumferential waviness, produces fluid during dynamic and static ring end face is rotated against
Dynamic pressure effect so that the contact area between stationary ring seal face 21 and ring seal end face 11 reduces slightly so that lubrication effect
More preferably, seal face coefficient of friction reduces fruit, and the frictional heat of generation is reduced.
Preferably, on the circumference of stationary ring 2, uniform intervals are provided with multiple stationary ring flushing holes 22, are rinsed by multiple stationary rings
The uniform intervals in hole 22 are arranged so that produce the hot fluid for becoming apparent between stationary ring seal face 21 and ring seal end face 11
Dynamic pressure effect so that the frictional heat produced between stationary ring seal face 21 and ring seal end face 11 is less.
For the setting of the number of stationary ring flushing hole 22 on stationary ring 2, according to the diameter of stationary ring 2, and rotating shaft 10
Maximum (top) speed is selected, and typically arranging 4 ~ 16 stationary ring flushing holes 22 can.In the present embodiment, on stationary ring 2, uniform intervals are arranged
There are 4 stationary ring flushing holes 22.
In the present embodiment, shown in Figure 2, stationary ring 2 includes sealing 23 and fixed part 24, and stationary ring seal face 21 is located at
The end of sealing 23, the other end of sealing 23 stretch out the fixed part 24 to be formed, and stationary ring flushing hole 22 is opened in fixation
In portion 24.
In the present embodiment, for the fixation of stationary ring 2, the baffle ring 33 for extending internally, fixed part is provided with the right-hand member of gland 3
24 are located between baffle ring 33 and hold-down ring 4, and baffle ring 33, fixed part 24, hold-down ring 4 are brought into close contact successively in other words.Gland 3 is fixed
On the housing 20, hold-down ring 4 is fixed on gland 3.
In some embodiments of the invention, stationary ring flushing hole 22 is with the axial direction part 221 with the diameter parallel of stationary ring 2,
And flushing liquor to be drained to axial direction part 221 outside of ring seal end face 11 and stationary ring seal face 21.By arrange with it is quiet
The axial direction part 221 of the diameter parallel of ring 2 so that flushing liquor in axial direction reaches ring seal end face 11 and stationary ring seal face
21 outside, contributes to the impurity at ring seal end face 11 and stationary ring seal face 21 is flushed to away from seal face, keeps away
Exempt from impurity to intervene between dynamic and static ring seal face, improve cleaning effect.
In the present embodiment, shown in Figure 8, stationary ring flushing hole 22 is L-type, with the radial section 222 positioned at 2 radial direction of stationary ring
And the axial direction part 221 with the diameter parallel of stationary ring 2.Certainly, in other embodiments, for the structure of stationary ring flushing hole 22,
There can be other various ways, for example, be obliquely installed.
In the present embodiment, referring to shown in Fig. 1 to Fig. 3, in order to further increase flushing liquor for 11 He of ring seal end face
Cleaning effect at stationary ring seal face 21, axial direction part 221 are more than or equal to sealing 23 apart from the minimum range of 2 axis of stationary ring
Outer radius, preferably axially section 221 apart from 2 axis of stationary ring minimum range be slightly larger than or equal to the outer radius of sealing 23, this
Sample is in the case where the intensity of stationary ring 2 is ensured so that after flushing liquor is flowed out from axial direction part 221, directly along the appearance of sealing 23
Face is reached at seal face so that the flow velocity of flushing liquor is larger, is increased cleaning effect, and is increased cooling effect.
In the present embodiment, the diameter of the outer surface with diameter greater than sealing 23 of the outer surface of rotating ring 1, in 1 end face of rotating ring
Outer radius are provided with 30 ° ~ 45 ° of fillet surface 12, so as to get up to ring seal end face 11 and the flushing liquor of stationary ring seal face 21,
Break through along fillet surface 12, also just washed from seal face beneficial to impurity.
As the fluid media (medium) in the housing 20 of conveying equipment for fluid substances has certain seal pressure so that ring seal end
There is inside and outside face 11 and stationary ring seal face 21 pressure differential.In order to reduce ring seal end face 11 and stationary ring seal face
Pressure differential inside and outside 21, arranges back pressure cavity 6 on axle end sealing device, injects with certain pressure in back pressure cavity 6
Back pressure medium so that pressure differential inside and outside ring seal end face 11 and stationary ring seal face 21 reduces, and improves rotating ring 1
With the working environment of stationary ring 2, sealing is increased, improve service life.
In the present embodiment, the internal diameter of stationary ring 2 is more than the external diameter of rotating shaft 10, that is, has between stationary ring 2 and rotating shaft 10
Belt gap；After axle end sealing device is installed to 10 end of rotating shaft, between stationary ring 2, hold-down ring 4 and rotating shaft 10, annular is surrounded
Back pressure cavity 6, into back pressure cavity 6 injection with certain pressure back pressure medium, such as the pressure of the fluid media (medium) in housing 20
For 3 atmospheric pressure, the back pressure medium that pressure is 2 atmospheric pressure is injected into back pressure cavity 6, so that 11 He of ring seal end face
Pressure differential inside and outside stationary ring seal face 21 is reduced to 1 atmospheric pressure, improves the operating condition of rotating ring 1 and stationary ring 2,
Sealing is increased, and improves service life.
In the present embodiment, referring to shown in Fig. 1 and Fig. 2, the back pressure hole being connected with back pressure cavity 6 is offered on hold-down ring 4
41, the introduction hole 32 being connected with back pressure hole 41, that is, back pressure medium is offered on gland 3 by the laggard of introduction hole 32
Enter back pressure hole 41, finally reach back pressure cavity 6.When mounted introduction hole 32 and back pressure hole 41 should centering, in order to improve installation
Efficiency, is provided with reaming 411 in the end of back pressure hole 41, and reaming 411 is connected with introduction hole 32, and the diameter of reaming 411 is big
In the diameter of back pressure hole 41, the diameter with diameter greater than introduction hole 32 of reaming 411.Caused when mounted by arranging reaming 411,
Even if introduction hole 32 has slightly deflected, introduction hole 32 still can be located in the range of reaming 411 so that hold-down ring 4 is installed to pressure
During lid 3, in positioning without too accurate, installation effectiveness is improve；The reaming 411 slightly larger by arranging diameter, also helps simultaneously
In the pressure of the back pressure medium ensured into back pressure hole 41.Due to being certain to back pressure medium between hold-down ring 4 and rotating shaft 10
Leakage slightly, thus back pressure medium is typically chosen nitrogen or air.
In some embodiments of the invention, referring to shown in Fig. 1 and Fig. 2, for the fixation between rotating ring 1 and rotating shaft 10,
Axle end sealing device also includes transmission ring 7, corrugated tube 8 and rotating seat 9, and transmission ring 7 is fixed in rotating shaft 10, and rotating ring 1 is fixed on
On rotating seat 9, be provided with corrugated tube 8 between transmission ring 7 and rotating seat 9, the two ends of corrugated tube 8 respectively with transmission ring 7 and dynamic
The sealing of ring seat 9 is fixed.When axle end sealing device is installed, give corrugated tube 8 certain pre compressed magnitude so that in corrugated tube 8
Under thrust, rotating ring 1, stationary ring 2 end face it is bonded to each other；Additionally, corrugated tube 8 also acts as the effect of auxiliary seal.
In the present embodiment, referring to shown in Fig. 1 and Fig. 6, corrugated tube 8 has helical fissure, when rotating shaft 10 rotates, drives
Transmission ring 7, corrugated tube 8 and rotating ring 1 rotate together, now the fluid media (medium) on the outside of corrugated tube 8, make in the pumping of helical fissure
With under, with the movement tendency away from rotating ring 1, that is, move to inverse leakage direction, reduce ring seal end face 11 and stationary ring
Fluid medium pressure at seal face 21, strengthens sealing.
In order to avoid corrugated tube 8 bears larger torque when rotating, shift fork 71, rotating seat 9 is provided with transmission ring 7
On offer the notch 91 matched with shift fork 71, the end of shift fork 71 is located in notch 91.So that transmission ring 7 passes through shift fork 71
Drive rotating seat 9 and rotating ring 1 to rotate, the torque that corrugated tube 8 is carried can be made to be down to minimum, it is ensured that the use longevity of corrugated tube 8
Life.
In the present embodiment, referring to shown in Fig. 4 and Fig. 5, being provided with relative two shift fork 71 on transmission ring 7.Shift fork 71
It is the cambered surface coaxial with transmission ring 7, the corresponding central angle of cambered surface for arranging shift fork 71 is 15 ° ~ 40 °, is preferably arranged to 25 °；If
The radial thickness for putting shift fork 71 is 3mm ~ 5mm.
In the present embodiment, stop pin 42 is provided between stationary ring 2 and hold-down ring 4, stop pin 42 is fixed on hold-down ring 4
On, the pin-and-hole matched with stop pin 4 is provided with stationary ring 2, stop pin 4 is located in pin-and-hole.Stop pin 42 also has peace simultaneously
Positioning action during dress hold-down ring 4, hold-down ring 4 are fixed by screws on gland 3, and gland 3 is fixed on the housing 20.
In the present embodiment, referring to shown in Fig. 1 and Fig. 2, for the fluid media (medium) in seal casinghousing 20, in gland 3 and housing
O-ring is both provided between 20, between gland 3 and hold-down ring 4, between transmission ring 7 and rotating shaft.Between stationary ring 2 and hold-down ring 4
It is provided with graphite gasket 43 so that graphite gasket 43 can alleviate the stress concentration that 2 thermal deformation of stationary ring is caused.
The above, is only presently preferred embodiments of the present invention, is not the restriction for making other forms to the present invention, is appointed
What those skilled in the art possibly also with the disclosure above technology contents changed or be modified as equivalent variations etc.
Effect embodiment.But it is every without departing from technical solution of the present invention content, according to the technical spirit of the present invention to above example institute
Any simple modification, equivalent variations and the remodeling made, still falls within the protection domain of technical solution of the present invention.
Claims (9)
1. a kind of axle end sealing device, is arranged at the end of rotating shaft, has including rotating ring, stationary ring, the rotating ring and stationary ring respectively
The relative ring seal end face for reclining and stationary ring seal face, it is characterised in that the axle end sealing device also has for solid
The gland and hold-down ring of the fixed stationary ring, the hold-down ring are located at the inner side of the gland, the gland, hold-down ring and stationary ring it
Between surround the flushing sap cavity of annular, offer on the gland and rinse the flushing hole that is connected of sap cavity with described, on the stationary ring
Offering and the stationary ring flushing hole that is connected of sap cavity being rinsed with described, the stationary ring flushing hole is by the flushing liquor drain of flushing liquor intracavity
To the outside of the dynamic and static ring seal face；External diameter of the internal diameter of the stationary ring more than the rotating shaft, when the shaft end seal is filled
Put after being installed to the rotating shaft, surround the back pressure cavity of annular between the stationary ring, hold-down ring and the rotating shaft, to the back pressure cavity
Interior back pressure medium of the injection with certain pressure, for reducing the pressure differential at the dynamic and static ring seal face internal-and external diameter.
2. axle end sealing device according to claim 1, it is characterised in that uniform intervals are arranged on the circumference of the stationary ring
There are multiple stationary ring flushing holes.
3. axle end sealing device according to claim 2, it is characterised in that when the axle end sealing device be installed to it is described
After rotating shaft, when the rotating shaft rotates, the flushing liquor is entered from the flushing hole and rinses sap cavity, flows through multiple stationary ring punchings afterwards
The outside of the dynamic and static ring seal face is reached after hole flushing；And cause micro thermal deformation on stationary ring seal face so that dynamic,
Hot fluid dynamic pressure effect is produced between stationary ring seal face.
4. axle end sealing device according to claim 1, it is characterised in that the stationary ring includes sealing with the stationary ring
The sealing of end face and the fixed part for being formed that stretched out by the end of the sealing, the stationary ring flushing hole are opened in
On the fixed part.
5. axle end sealing device according to claim 1, it is characterised in that the stationary ring flushing hole with the stationary ring
Diameter parallel axial direction part, flushing liquor is drained to the axial direction part outside of the dynamic and static ring seal face.
6. the axle end sealing device according to any one of claim 1 to 5, it is characterised in that offer on the hold-down ring
The back pressure hole being connected with the back pressure cavity, offers the introduction hole being connected with the back pressure hole on the gland.
7. the axle end sealing device according to any one of claim 1 to 5, it is characterised in that axle end sealing device also includes
The transmission ring fixed with the rotating shaft, the rotating seat of the fixation rotating ring and it is tightly connected the transmission ring and rotating seat
Corrugated tube, the corrugated tube have helical fissure；After the axle end sealing device is installed to the rotating shaft, in the rotating shaft
During rotation, the corrugated tube is driven to rotate together, the effect that the fluid media (medium) on the outside of the corrugated tube is pumped in helical fissure
Down with the movement tendency away from the rotating ring.
8. axle end sealing device according to claim 7, it is characterised in that be provided with shift fork on the transmission ring, it is described
The notch matched with the shift fork is offered on rotating seat, and the end of the shift fork is located in the notch.
9. a kind of conveying equipment for fluid substances, including housing, the fluid media (medium) in the housing and rotating shaft, it is characterised in that
The shaft end of the rotating shaft is provided with the axle end sealing device described in any one of claim 1 to 8, and the gland is fixed on the shell
On body, the hold-down ring is pressed on the stationary ring on the gland.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510486270.2A CN105114631B (en) | 2015-08-11 | 2015-08-11 | Shaft end sealing device and fluid conveying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510486270.2A CN105114631B (en) | 2015-08-11 | 2015-08-11 | Shaft end sealing device and fluid conveying equipment |
Publications (2)
| Publication Number | Publication Date |
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| CN105114631A CN105114631A (en) | 2015-12-02 |
| CN105114631B true CN105114631B (en) | 2017-03-22 |
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| CN201510486270.2A Active CN105114631B (en) | 2015-08-11 | 2015-08-11 | Shaft end sealing device and fluid conveying equipment |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102017204004A1 (en) * | 2016-03-22 | 2017-09-28 | Ksb Aktiengesellschaft | SEAL |
| CN106089692A (en) * | 2016-07-01 | 2016-11-09 | 魏宇坤 | A kind of cryogenic liquid pump self-lubricating contact device and method |
| CN108343747B (en) * | 2018-01-24 | 2020-02-07 | 中国石油大学(华东) | Monitoring type shaft end sealing system and control method |
| CN112096874B (en) * | 2020-08-31 | 2022-11-08 | 东台市光明机械密封有限公司 | High-wear-resistance double-end-face mechanical sealing element and machining process thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL171617C (en) * | 1974-03-01 | 1983-04-18 | Burgmann Dichtungswerk Feodor | SLIDING SEAL. |
| US5544897A (en) * | 1993-08-19 | 1996-08-13 | A. W. Chesterton Co. | Cartridge seal having a high contact pressure seal and means for intersleeve adjustment including quench fluid delivery |
| CN2711469Y (en) * | 2004-06-11 | 2005-07-20 | 新疆乌苏市北方新科有限公司 | Mechanical seal device for light hydrocarbon pump |
| CN2746210Y (en) * | 2004-12-04 | 2005-12-14 | 倪文龙 | Mechanical sealing |
| CN2811688Y (en) * | 2005-06-27 | 2006-08-30 | 石富江 | Through flushing type slurry mechanical sealing device |
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| CN105114631A (en) | 2015-12-02 |
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