CN105114631A - Shaft end sealing device and fluid conveying equipment - Google Patents
Shaft end sealing device and fluid conveying equipment Download PDFInfo
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- CN105114631A CN105114631A CN201510486270.2A CN201510486270A CN105114631A CN 105114631 A CN105114631 A CN 105114631A CN 201510486270 A CN201510486270 A CN 201510486270A CN 105114631 A CN105114631 A CN 105114631A
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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, be specifically related to a kind of shaft end seal device and there is the conveying equipment for fluid substances of this shaft end seal device.
Background technique
The conveying equipment for fluid substances such as pump, compressor of petroleum chemical industry commonly uses single end face contacting mechanical seal as shaft end seal device.Conveying equipment for fluid substances, by the fluid-encapsulated medium of shaft end seal device, is had certain sealing load by the flowing medium sealed.Shaft end seal device mainly relies on the seal face of dynamic and static ring to fit tightly and realizes sealing, and rotating ring rotates together with rotating shaft, and stationary ring and housing are fixed, and in conveying equipment for fluid substances running, the seal face of dynamic and static ring produces a large amount of frictional heat.
In order to cool the seal face of dynamic and static ring, dynamic and static ring is cooled by injecting washing solution, directly radially Seal cage is squeezed into from the outer washing solution of washing solution or outside from the single flushing hole of shaft end seal device from pump discharge, rinse the outside of the seal face of dynamic and static ring, play certain cooling and cleaning action; But flush points is single, it is insufficient to rinse, and the cooling effect especially for stationary ring is poor, for the stationary ring part near flushing hole, there is good cooling effect, but poor away from the stationary ring part cooling effect of flushing hole; Thus cooling effect is undesirable, and the seal face of dynamic and static ring can occur that temperature is too high, even collapses the failure mode such as limit, eccentric wear.Meanwhile, current washing solution directly squeezes into Seal cage, owing to having certain sealed medium pressure in Seal cage, and the washing solution limited pressure squeezed into, makes washing solution enter the mobility after Seal cage not high, causes cooling effect lower; And the flushing direction of washing solution is square with the axis, make the ability of washing away impurity not high, cleaning effect is bad, and the Problem of Failure that medium causes can appear in the seal face of dynamic and static ring; Thus current shaft end seal device working life is short, it is frequent to change, and both labor intensive financial resources, have a strong impact on again the normal operation of whole set process device.
Summary of the invention
The invention provides a kind of shaft end seal device, for solving the bad problem of washing solution cooling effect of the prior art, improving sealability and working life.
For reaching above-mentioned technical purpose, the present invention realizes by the following technical solutions:
A kind of shaft end seal device, be arranged at the end of rotating shaft, comprise rotating ring, stationary ring, described rotating ring and stationary ring have the relative ring seal end face that reclines and stationary ring seal face respectively, described shaft end seal device also has gland for fixing described stationary ring and hold-down ring, described hold-down ring is positioned at the inner side of described gland, described gland, the flushing sap cavity of annular is surrounded between hold-down ring and stationary ring, described gland offers the flushing hole be connected with described flushing sap cavity, described stationary ring offers the stationary ring flushing hole be connected with described flushing sap cavity, the washing solution rinsed in sap cavity is drained to described dynamic by described stationary ring flushing hole, the outside of stationary ring seal face.
Further, described stationary ring be circumferentially arranged at intervals with multiple described stationary ring flushing hole.
Further, the circumferentially uniform intervals of described stationary ring is provided with multiple described stationary ring flushing hole.
Further, described stationary ring is arranged 4 ~ 16 stationary ring flushing holes.
Further, after described shaft end seal device is installed to described rotating shaft, when described rotating shaft rotates, described washing solution enters flushing sap cavity from described flushing hole, reaches the outside of described dynamic and static ring seal face after flowing through multiple stationary ring flushing hole afterwards; And cause the micro-thermal distortion on stationary ring seal face, make to produce hot fluid dynamic pressure effect between dynamic and static ring seal face.
Further, described stationary ring comprises the sealed department with described stationary ring seal face and to be stretched out the fixing part formed by the end of described sealed department, and described stationary ring flushing hole is opened on described fixing part.
Further, described stationary ring flushing hole has the axial direction part with the axis being parallel of described stationary ring, and washing solution is drained to the outside of described dynamic and static ring seal face by described axial direction part.
Further, described stationary ring flushing hole also has the radial section being positioned at described stationary ring radial direction.
Further, described axial direction part is more than or equal to the outer radius of described sealed department apart from the minimum range of described stationary ring axis.
Further, the diameter of the outer surface of described rotating ring is greater than the diameter of the outer surface of described sealed department, and described rotating ring end face outer radius is provided with the chamfer surface of 30 ° ~ 45 °.
Further, described gland one end is provided with the baffle ring extended internally, and described stationary ring is provided with outward extending fixing part, and described baffle ring, fixing part, hold-down ring fit tightly successively.
Further, the internal diameter of described stationary ring is greater than the external diameter of described rotating shaft, after described shaft end seal device is installed to described rotating shaft, described stationary ring, surround between hold-down ring and described rotating shaft annular back pressure cavity, the back pressure medium with certain pressure is injected, for reducing the pressure difference at described dynamic and static ring seal face internal-and external diameter place in described back pressure cavity.
Further, described hold-down ring offers the back pressure hole be connected with described back pressure cavity.
Further, described gland offers with described back pressure hole to the introduction hole be communicated with.
Further, the end of described back pressure hole is provided with reaming, described reaming is connected with described introduction hole, and the diameter of described reaming is greater than the diameter of described back pressure hole, and the diameter of described reaming is greater than the diameter of described introduction hole.
Further, shaft end seal device also comprises the transmission ring fixed with described rotating shaft, the fixing rotating seat of described rotating ring and the bellows of be tightly connected described transmission ring and rotating seat, and described bellows has helical fissure; After described shaft end seal device is installed to described rotating shaft, when described rotating shaft rotates, drive described bellows to rotate together, the flowing medium outside described bellows has the movement tendency away from described rotating ring under the effect of helical fissure pumping.
Further, described bellows has certain pre compressed magnitude after installing.
Further, described transmission ring is provided with shift fork, described rotating seat offers the notch matched with described shift fork, the end of described shift fork is positioned at described notch.
Further, described shift fork is the cambered surface coaxial with described transmission ring, and central angle corresponding to described cambered surface is 15 ° ~ 40 °.
Further, the radial thickness of described shift fork is 3mm ~ 5mm.
Further, described transmission ring is provided with two relative shift forks.
Further, stop pin is provided with between described stationary ring and described hold-down ring.
Further, graphite gasket is provided with between described stationary ring and described hold-down ring.
Further, O type circle is provided with between described hold-down ring and described gland.
Based on above-mentioned a kind of shaft end seal device, the present invention also provides a kind of conveying equipment for fluid substances, comprise housing, be positioned at flowing medium and the rotating shaft of described housing, the axle head of described rotating shaft is provided with above-mentioned shaft end seal device, described gland is fixing on the housing, and described stationary ring is pressed on described gland by described hold-down ring.
Shaft end seal device provided by the invention, by arranging by described gland, the flushing sap cavity surrounding annular between hold-down ring and stationary ring, make it possible in flushing sap cavity, fill washing solution by flushing hole, make to surround the stationary ring end face rinsing sap cavity to be in all the time in the immersion of washing solution, the heat that driven, stationary ring seal face is passed over reduces fast, improves the cooling effect for dynamic and static ring; And on described stationary ring, offer the stationary ring flushing hole be connected with described flushing sap cavity, make washing solution flow through stationary ring inside and the heat of stationary ring flushing hole place is taken away, improve the cooling effect of washing solution further; Finally, the washing solution rinsed in sap cavity is drained to the outside of described dynamic and static ring seal face by described stationary ring flushing hole, washing solution is rinsed the outside of dynamic and static ring seal face, plays the effect cooling and clean.
After reading the specific embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of shaft end seal device proposed by the invention;
Fig. 2 is the structure for amplifying schematic diagram of a-quadrant in Fig. 1;
Fig. 3 is the structure for amplifying schematic diagram of part-structure in Fig. 1;
Fig. 4 is the structural representation after bellows and transmission ring are fixed;
Fig. 5 be in Fig. 4 B-B to the structural representation of the transmission ring analysed and observe;
Fig. 6 is the structural representation of bellows;
Fig. 7 is the structural representation of stationary ring;
Fig. 8 is the sectional structure schematic diagram of Fig. 7.
Embodiment
For making the object of the embodiment of the present invention, technological scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is clearly and completely described.
In describing the invention, it should be noted that, definition term: be " interior " with the direction of axis near shaft end seal device, be " outward " with the direction of the axis away from shaft end seal device, and the orientation that indicates such as term "left", "right" or position relationship are based on position relationship shown in the drawings; Term is only the present invention for convenience of description and simplified characterization, instead of indicates or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
Consult Fig. 1 to Fig. 8, an embodiment of shaft end seal device proposed by the invention, a kind of shaft end seal device is used for the end of the rotating shaft 10 of conveying equipment for fluid substances, conveying equipment for fluid substances has housing 20, is positioned at the flowing medium of housing 20 and rotating shaft 10, and shaft end seal device is used for the flowing medium in fluid-encapsulated conveying equipment.
Shaft end seal device comprises rotating ring 1, stationary ring 2 and for the gland 3 of fixing stationary ring 2 and hold-down ring 4; Hold-down ring 4 is positioned at the hold-down ring inside gland 3, and rotating ring 1 and stationary ring 2 have the relative ring seal end face 11 that reclines and stationary ring seal face 21 respectively.Wherein, gland 3, surround between hold-down ring 4 and stationary ring 2 annular flushing sap cavity 5, gland 3 offers and the flushing hole 31 of rinsing sap cavity 5 and being connected, flushing hole 31 is communicated with rinses sap cavity 5 with extraneous, 2 stationary rings offer and the stationary ring flushing hole 22 of rinsing sap cavity 5 and being connected, and the washing solution rinsed in sap cavity 5 is drained to the outside of ring seal end face 11 and stationary ring seal face 21 by stationary ring flushing hole 22.
In the present embodiment, see shown in Fig. 1 to Fig. 3, by arranging by gland 3, the flushing sap cavity 5 surrounding annular between hold-down ring 4 and stationary ring 2; After shaft end seal device is installed to rotating shaft 10, make it possible in flushing sap cavity 5, fill washing solution by flushing hole 31, make to surround the stationary ring end face rinsing sap cavity to be in all the time in the immersion of washing solution, the heat that driven torus seal face 11 and stationary ring seal face 21 are passed over reduces fast, improves the cooling effect for rotating ring 1 and stationary ring 2; And offer on stationary ring 2 and the stationary ring flushing hole 22 of rinsing sap cavity 5 and being connected, make washing solution flow through stationary ring 2 inside and the heat at stationary ring flushing hole 22 place is taken away, improve the cooling effect of washing solution further; Finally, the washing solution rinsed in sap cavity 5 is drained to the outside of ring seal end face 11 and stationary ring seal face 21 by stationary ring flushing hole 22, the outside of washing solution to ring seal end face 11 and stationary ring seal face 21 is rinsed, plays the effect cooling and clean.
In some embodiments of the invention, in order to improve cooling and cleaning effect further, shown in Figure 7, be circumferentially arranged at intervals with multiple stationary ring flushing hole 22 at stationary ring 2, the heat making washing solution flow through inner multiple spaced stationary ring flushing hole 22 place of stationary ring 2 is taken away, and improves cooling effect, and multi-point flushing is formed to the outside of ring seal end face 11 and stationary ring seal face 21, contribute to improving the cooling effect for ring seal end face 11 and stationary ring seal face 21 and cleaning effect, and because washing solution flows through the inner multiple spaced stationary ring flushing hole 22 of stationary ring 2, make to cause Light deformation on stationary ring seal face 21, make to produce hot fluid dynamic pressure effect between ring seal end face 11 and stationary ring seal face 21, stationary ring seal face 21 heat namely near stationary ring flushing hole 22 is taken away in time, make temperature slightly low, stationary ring seal face 21 temperature away from stationary ring flushing hole 22 is slightly high, again because stationary ring flushing hole 22 is arranged at the circumferentially interval of stationary ring 2, thus the temperature on stationary ring seal face 21 is made circumferentially to become height fluctuation status at end face, according to principle of expanding with heat and contracting with cold, stationary ring seal face 21 is made to produce micro-thermal distortion, form the waviness of circumference, dynamic, hydrodynamic effect is produced in the relative rotary course of stationary ring end face, area of contact between stationary ring seal face 21 and ring seal end face 11 is reduced slightly, make lubrication effect better, seal face friction factor reduces, the frictional heat produced reduces.
Preferably, the circumferentially uniform intervals of stationary ring 2 is provided with multiple stationary ring flushing hole 22, arranged by the uniform intervals of multiple stationary ring flushing hole 22, make to produce between stationary ring seal face 21 and ring seal end face 11 more significantly hot fluid dynamic pressure effect, make the frictional heat that produces between stationary ring seal face 21 and ring seal end face 11 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 the maximum (top) speed of rotating shaft 10 is selected, and generally arranges 4 ~ 16 stationary ring flushing holes 22 and just can.In the present embodiment, on stationary ring 2, uniform intervals is provided with 4 stationary ring flushing holes 22.
In the present embodiment, shown in Figure 2, stationary ring 2 comprises sealed department 23 and fixing part 24, and stationary ring seal face 21 is positioned at the end of sealed department 23, and the other end of sealed department 23 stretches out the fixing part 24 formed, and stationary ring flushing hole 22 is opened on fixing part 24.
In the present embodiment, fixing for stationary ring 2, be provided with the baffle ring 33 extended internally at the right-hand member of gland 3, fixing part 24 is between baffle ring 33 and hold-down ring 4, and baffle ring 33, fixing part 24, hold-down ring 4 fit tightly successively in other words.Gland 3 is fixing on the housing 20, and hold-down ring 4 is fixed on gland 3.
In some embodiments of the invention, stationary ring flushing hole 22 has the axial direction part 221 with the axis being parallel of stationary ring 2, and washing solution is drained to the outside of ring seal end face 11 and stationary ring seal face 21 by axial direction part 221.By arranging the axial direction part 221 with the axis being parallel of stationary ring 2, washing solution is made in axial direction to arrive the outside of ring seal end face 11 and stationary ring seal face 21, the impurity at ring seal end face 11 and stationary ring seal face 21 place is contributed to be flushed to away from seal face, avoid impurity to get involved 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, has the radial section 222 that is positioned at stationary ring 2 radial direction and the axial direction part 221 with the axis being parallel of stationary ring 2.Certainly, in other embodiments, for the structure of stationary ring flushing hole 22, also can there be other various ways, such as, be obliquely installed.
In the present embodiment, see shown in Fig. 1 to Fig. 3, in order to increase the cleaning effect of washing solution for ring seal end face 11 and stationary ring seal face 21 place further, axial direction part 221 is more than or equal to the outer radius of sealed department 23 apart from the minimum range of stationary ring 2 axis, preferably axially section 221 apart from stationary ring 2 axis minimum range slightly larger than or equal the outer radius of sealed department 23, like this when ensureing the intensity of stationary ring 2, after washing solution is flowed out from axial direction part 221, outer surface directly along sealed department 23 arrives seal face place, make the flow velocity of washing solution larger, increase cleaning effect, and increase cooling effect.
In the present embodiment, the diameter of the outer surface of rotating ring 1 is greater than the diameter of the outer surface of sealed department 23, the chamfer surface 12 of 30 ° ~ 45 ° is provided with in rotating ring 1 end face outer radius, make the washing solution arriving ring seal end face 11 and stationary ring seal face 21, break through along chamfer surface 12, be also just beneficial to impurity and washed from seal face place.
Because the flowing medium in the housing 20 of conveying equipment for fluid substances has certain sealing load, the inside and outside both sides of ring seal end face 11 and stationary ring seal face 21 are made to have pressure difference.In order to reduce the pressure difference of both sides inside and outside ring seal end face 11 and stationary ring seal face 21, shaft end seal device arranges back pressure cavity 6, the back pressure medium with certain pressure is injected in back pressure cavity 6, the pressure difference of the inside and outside both sides of ring seal end face 11 and stationary ring seal face 21 is reduced, improve the working environment of rotating ring 1 and stationary ring 2, add sealing, improve working life.
In the present embodiment, the internal diameter of stationary ring 2 is greater than the external diameter of rotating shaft 10, namely between stationary ring 2 and rotating shaft 10, has belt gap; After shaft end seal device is installed to rotating shaft 10 end, stationary ring 2, surround between hold-down ring 4 and rotating shaft 10 annular back pressure cavity 6, the back pressure medium with certain pressure is injected in back pressure cavity 6, the pressure of such as, flowing medium in housing 20 is 3 barometric pressure, in back pressure cavity 6, injection pressure is 2 atmospheric back pressure media, the pressure difference of the inside and outside both sides of ring seal end face 11 and stationary ring seal face 21 is made to be reduced to 1 barometric pressure like this, improve the operating conditions of rotating ring 1 and stationary ring 2, add sealing, and improve working life.
In the present embodiment, shown in Fig. 1 and Fig. 2, hold-down ring 4 offers the back pressure hole 41 be connected with back pressure cavity 6, gland 3 offers the introduction hole 32 be connected with back pressure hole 41, namely back pressure medium enters back pressure hole 41 by after introduction hole 32, finally arrives back pressure cavity 6.Introduction hole 32 and back pressure hole 41 should centerings when mounted, in order to improve the efficiency of installation, the end of back pressure hole 41 is provided with reaming 411, reaming 411 is connected with introduction hole 32, and the diameter of reaming 411 is greater than the diameter of back pressure hole 41, the diameter of reaming 411 is greater than the diameter of introduction hole 32.Make when mounted by arranging reaming 411, even if introduction hole 32 has deflection a little, introduction hole 32 still can be positioned at the scope of reaming 411, when making hold-down ring 4 be installed to gland 3, need not be too accurate when locating, and improve installation efficiency; Simultaneously by arranging the slightly large reaming of diameter 411, also contribute to the pressure of the back pressure medium ensureing to enter back pressure hole 41.Owing to being certain to the leakage slightly that back pressure medium occurs between hold-down ring 4 and rotating shaft 10, thus back pressure medium generally selects nitrogen or air.
In some embodiments of the invention, shown in Fig. 1 and Fig. 2, for fixing between rotating ring 1 and rotating shaft 10, shaft end seal device also comprises transmission ring 7, bellows 8 and rotating seat 9, transmission ring 7 is fixed in rotating shaft 10, rotating ring 1 is fixed on rotating seat 9, is provided with bellows 8 between transmission ring 7 and rotating seat 9, and the two ends of bellows 8 seal fixing respectively with transmission ring 7 and rotating seat 9.When shaft end seal device is installed, give the pre compressed magnitude that bellows 8 is certain, make under the thrust of bellows 8, the end face of rotating ring 1, stationary ring 2 is bonded to each other; In addition, bellows 8 also plays the effect of auxiliary seal.
In the present embodiment, shown in Fig. 1 and Fig. 6, bellows 8 has helical fissure, and when rotating shaft 10 rotates, drive transmission ring 7, bellows 8 rotate together with rotating ring 1, flowing medium now outside bellows 8, under the pump action of helical fissure, there is the movement tendency away from rotating ring 1, namely leak direction motion to inverse, reduce the fluid medium pressure at ring seal end face 11 and stationary ring seal face 21 place, strengthen sealing.
In order to avoid when rotating, bellows 8 bears larger torque, transmission ring 7 is provided with shift fork 71, rotating seat 9 offers the notch 91 matched with shift fork 71, the end of shift fork 71 is positioned at notch 91.Make transmission ring 7 drive rotating seat 9 and rotating ring 1 to rotate by shift fork 71, the torque drop that bellows 8 can be made to carry, to minimum, ensure that the working life of bellows 8.
In the present embodiment, shown in Fig. 4 and Fig. 5, transmission ring 7 is provided with two relative shift forks 71.Shift fork 71 is the cambered surface coaxial with transmission ring 7, and the central angle arranging the cambered surface of shift fork 71 corresponding is 15 ° ~ 40 °, is preferably set to 25 °; The radial thickness arranging shift fork 71 is 3mm ~ 5mm.
In the present embodiment, be provided with stop pin 42 between stationary ring 2 and hold-down ring 4, stop pin 42 is fixed on hold-down ring 4, and be provided with the pin-and-hole matched with stop pin 4 at stationary ring 2, stop pin 4 is positioned at pin-and-hole.Stop pin 42 also has positioning action when installing hold-down ring 4 simultaneously, and hold-down ring 4 is fixed by screws on gland 3, and gland 3 is fixing on the housing 20.
In the present embodiment, shown in Fig. 1 and Fig. 2, in order to the flowing medium in seal casinghousing 20, between gland 3 and housing 20, between gland 3 and hold-down ring 4, between transmission ring 7 and rotating shaft, be all provided with O type circle.Between stationary ring 2 and hold-down ring 4, be provided with graphite gasket 43, graphite gasket 43 can be alleviated, and stress that stationary ring 2 thermal distortion causes is concentrated.
The above is only preferred embodiment of the present invention, and be not restriction the present invention being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solution of the present invention content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (10)
1. a shaft end seal device, be arranged at the end of rotating shaft, comprise rotating ring, stationary ring, described rotating ring and stationary ring have the relative ring seal end face that reclines and stationary ring seal face respectively, it is characterized in that, described shaft end seal device also has gland for fixing described stationary ring and hold-down ring, described hold-down ring is positioned at the inner side of described gland, described gland, the flushing sap cavity of annular is surrounded between hold-down ring and stationary ring, described gland offers the flushing hole be connected with described flushing sap cavity, described stationary ring offers the stationary ring flushing hole be connected with described flushing sap cavity, the washing solution rinsed in sap cavity is drained to described dynamic by described stationary ring flushing hole, the outside of stationary ring seal face.
2. shaft end seal device according to claim 1, is characterized in that, the circumferentially uniform intervals of described stationary ring is provided with multiple described stationary ring flushing hole.
3. shaft end seal device according to claim 2, it is characterized in that, after described shaft end seal device is installed to described rotating shaft, when described rotating shaft rotates, described washing solution enters flushing sap cavity from described flushing hole, reaches the outside of described dynamic and static ring seal face after flowing through multiple stationary ring flushing hole afterwards; And cause the micro-thermal distortion on stationary ring seal face, make to produce hot fluid dynamic pressure effect between dynamic and static ring seal face.
4. shaft end seal device according to claim 1, it is characterized in that, described stationary ring comprises the sealed department with described stationary ring seal face and to be stretched out the fixing part formed by the end of described sealed department, and described stationary ring flushing hole is opened on described fixing part.
5. shaft end seal device according to claim 1, is characterized in that, described stationary ring flushing hole has the axial direction part with the axis being parallel of described stationary ring, and washing solution is drained to the outside of described dynamic and static ring seal face by described axial direction part.
6. the shaft end seal device according to any one of claim 1 to 5, it is characterized in that, the internal diameter of described stationary ring is greater than the external diameter of described rotating shaft, after described shaft end seal device is installed to described rotating shaft, described stationary ring, surround between hold-down ring and described rotating shaft annular back pressure cavity, the back pressure medium with certain pressure is injected, for reducing the pressure difference at described dynamic and static ring seal face internal-and external diameter place in described back pressure cavity.
7. shaft end seal device according to claim 6, is characterized in that, described hold-down ring offers the back pressure hole be connected with described back pressure cavity, described gland offers the introduction hole be connected with described back pressure hole.
8. the shaft end seal device according to any one of claim 1 to 5, it is characterized in that, shaft end seal device also comprises the transmission ring fixed with described rotating shaft, the fixing rotating seat of described rotating ring and the bellows of be tightly connected described transmission ring and rotating seat, and described bellows has helical fissure; After described shaft end seal device is installed to described rotating shaft, when described rotating shaft rotates, drive described bellows to rotate together, the flowing medium outside described bellows has the movement tendency away from described rotating ring under the effect of helical fissure pumping.
9. shaft end seal device according to claim 8, is characterized in that, described transmission ring is provided with shift fork, described rotating seat offers the notch matched with described shift fork, and the end of described shift fork is positioned at described notch.
10. a conveying equipment for fluid substances, comprise housing, be positioned at flowing medium and the rotating shaft of described housing, it is characterized in that, the axle head of described rotating shaft is provided with the shaft end seal device described in any one of claim 1 to 9, described gland is fixing on the housing, and described stationary ring is pressed on described gland by described hold-down ring.
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| 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510486270.2A CN105114631B (en) | 2015-08-11 | 2015-08-11 | Shaft end sealing device and fluid conveying equipment |
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| CN105114631A true CN105114631A (en) | 2015-12-02 |
| CN105114631B CN105114631B (en) | 2017-03-22 |
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Cited By (5)
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| CN106089692A (en) * | 2016-07-01 | 2016-11-09 | 魏宇坤 | A kind of cryogenic liquid pump self-lubricating contact device and method |
| CN108343747A (en) * | 2018-01-24 | 2018-07-31 | 中国石油大学(华东) | One kind can monitor-type shaft end seal system and control method |
| CN109072925A (en) * | 2016-03-22 | 2018-12-21 | Ksb股份有限公司 | Centrifugal pump with sliding-ring seal |
| CN110617331A (en) * | 2019-09-24 | 2019-12-27 | 浙江工业大学 | Mechanical sealing device |
| CN112096874A (en) * | 2020-08-31 | 2020-12-18 | 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 |
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| CN108343747A (en) * | 2018-01-24 | 2018-07-31 | 中国石油大学(华东) | One kind can monitor-type shaft end seal system and control method |
| CN110617331A (en) * | 2019-09-24 | 2019-12-27 | 浙江工业大学 | Mechanical sealing device |
| CN112096874A (en) * | 2020-08-31 | 2020-12-18 | 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 |
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| CN105114631B (en) | 2017-03-22 |
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