CN110883099A - Sealing system and planetary rolling mill - Google Patents
Sealing system and planetary rolling mill Download PDFInfo
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- CN110883099A CN110883099A CN201911272484.4A CN201911272484A CN110883099A CN 110883099 A CN110883099 A CN 110883099A CN 201911272484 A CN201911272484 A CN 201911272484A CN 110883099 A CN110883099 A CN 110883099A
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- labyrinth structure
- labyrinth
- sealing
- rolling mill
- planetary rolling
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- 238000007789 sealing Methods 0.000 title claims abstract description 84
- 238000005096 rolling process Methods 0.000 title claims abstract description 51
- 230000001681 protective effect Effects 0.000 claims abstract description 39
- 230000009467 reduction Effects 0.000 claims abstract description 32
- 238000009434 installation Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 29
- 239000002184 metal Substances 0.000 abstract description 9
- 229910052751 metal Inorganic materials 0.000 abstract description 9
- 239000003921 oil Substances 0.000 description 54
- 235000019198 oils Nutrition 0.000 description 46
- 239000007789 gas Substances 0.000 description 38
- 239000010687 lubricating oil Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 239000002828 fuel tank Substances 0.000 description 5
- 230000001050 lubricating effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 235000019476 oil-water mixture Nutrition 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/07—Adaptation of roll neck bearings
- B21B31/078—Sealing devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/18—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for step-by-step or planetary rolling; pendulum mills
- B21B13/20—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for step-by-step or planetary rolling; pendulum mills for planetary rolling
-
- 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
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention provides a sealing system and a planetary rolling mill, relates to the technical field of metal rolling processing, and aims to solve the technical problem that water vapor in a protective cover easily enters a main reduction gearbox in the prior art. The sealing system comprises a first sealing assembly arranged between a main reduction gearbox and a rolling head, wherein the first sealing assembly comprises a first labyrinth structure and a second labyrinth structure; the first labyrinth structure is installed in the outside of second labyrinth structure to constitute labyrinth seal, and be provided with first sealing strip between first labyrinth structure and the second labyrinth structure. According to the technical scheme, water vapor in the protective cover is difficult to penetrate through the first sealing assembly to enter the main reduction gearbox, so that the main reduction gearbox is not easy to damage.
Description
Technical Field
The invention relates to the technical field of metal rolling processing, in particular to a sealing system and a planetary rolling mill.
Background
The planetary rolling mill is a continuous pressing rolling mill with large rolling reduction, is an ideal device for processing pipes and bars, has the advantages of high efficiency, large rolling reduction, large elongation, simple and compact structure, simple and convenient operation, low power consumption and water consumption, no need of secondary heating, energy conservation, suitability for rolling red copper, brass, alloy steel which is difficult to deform and the like, thereby arousing the attention of numerous scientific and technical personnel engaged in plastic processing at home and abroad and being favored by manufacturers of nonferrous metal materials.
The rolling head in the planetary rolling mill is also called a suspension head and a compression roller base, is a component directly contacted with a rolled piece, and is a key component in the planetary rolling mill. The part is directly contacted with a rolled piece, the stress is the largest in a main machine, the lubricating condition is the worst, the temperature is the highest, and meanwhile, a large amount of sprayed cooling water is arranged outside a rolling head assembly. The longevity and stability of the components has been a difficulty and challenge for such devices.
When the planetary rolling mill rolls, the protective cover covers the outside of the rolling head, inert gas is filled into the protective cover to prevent the expanded metal from being oxidized, and cooling water is filled into the protective cover.
Although labyrinth seals are arranged between the main reduction gearbox and the rolling head and at the front support of the rolling head, the air pressure in the protective cover is larger than that in the main reduction gearbox due to the inert gas filled in the protective cover, and water vapor is easy to penetrate through the labyrinth seals to enter the main reduction gearbox, so that transmission parts in the main reduction gearbox, such as bearings, gears and the like are easy to damage.
Disclosure of Invention
The invention aims to provide a sealing system and a planetary rolling mill, and aims to solve the technical problem that water vapor in a protective cover easily enters a main reduction gearbox in the prior art.
In a first aspect, the present invention provides a sealing system comprising a first seal assembly for location between a main gearbox and a chock, and the first seal assembly comprising a first labyrinth arrangement and a second labyrinth arrangement;
the first labyrinth structure is installed outside the second labyrinth structure to constitute labyrinth seal, just first labyrinth structure with be provided with first sealing strip between the second labyrinth structure.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the first labyrinth structure is provided with a labyrinth groove along an axial direction of the main driving shaft;
the second labyrinth structure is provided with labyrinth protrusion along the axial direction of the main driving shaft, and the labyrinth protrusion extends into the labyrinth groove.
With reference to the first aspect, in a second possible implementation manner of the first aspect, the first labyrinth structure is provided with a first mounting groove along an axial direction of the main driving shaft;
the first sealing strip is installed in the first installation groove, and the first sealing strip is abutted to the second labyrinth structure.
With reference to the first aspect, the first or second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the sealing system includes a second sealing assembly for being disposed at a front support of the plug, and the second sealing assembly includes a third labyrinth structure and a fourth labyrinth structure;
the third labyrinth structure is installed in the outside of fourth labyrinth structure to constitute labyrinth, just the third labyrinth structure with be provided with the second sealing strip between the fourth labyrinth structure.
With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the fourth labyrinth structure is provided with a second installation groove along the axial direction of the main drive shaft;
the second sealing strip is installed in the second mounting groove, and the second sealing strip is abutted to the third labyrinth structure.
In a second aspect, the present invention provides a planetary rolling mill comprising a sealing system as described above.
With reference to the second aspect, in a first possible implementation manner of the second aspect, the planetary rolling mill further comprises a shielding gas input pipe and a shielding gas branch pipe;
one end of the protective gas input pipe extends into the protective cover, and the other end of the protective gas input pipe is communicated with a gas source;
one end of the shielding gas branch pipe is communicated with the inner cavity of the main reduction gearbox, and the other end of the shielding gas branch pipe is communicated with the shielding gas input pipe.
With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the sealing system further includes an air outlet pipeline, the air outlet pipeline is installed in the protective cover, and the air outlet pipeline is communicated with the shielding gas input pipe;
and the air outlet pipeline is provided with an air outlet facing the rolling head.
With reference to the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the air outlet pipeline is annular, and the air outlets are arranged at intervals along an extending direction of the air outlet pipeline.
With reference to the second aspect, in a fourth possible implementation manner of the second aspect, the planetary rolling mill further includes a micro-pressure sensor, and the micro-pressure sensor is mounted on the protective cover and is used for acquiring pressure data in the protective cover.
By combining the technical scheme, the beneficial effects brought by the invention are analyzed as follows:
the present invention provides a sealing system having a first seal assembly and a second seal assembly; the first sealing assembly comprises a first labyrinth structure and a second labyrinth structure, the first labyrinth structure is installed outside the second labyrinth structure, and a first sealing strip is arranged between the first labyrinth structure and the second labyrinth structure. The first sealing strip enhances the sealing effect between the first labyrinth structure and the second labyrinth structure, and when the sealing system is installed on a planetary rolling mill, water vapor in the protective cover difficultly passes through the first sealing assembly to enter the main reduction gearbox, so that the main reduction gearbox is not easy to damage.
The invention also provides a planetary rolling mill which comprises the sealing system. The sealing system can effectively block water vapor in the protective cover, so that the water vapor is difficult to enter the main reduction gearbox, and the main reduction gearbox is not easy to damage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a prior planetary rolling mill;
FIG. 2 is a schematic structural diagram of a prior art first seal assembly;
FIG. 3 is a schematic structural view of a prior art second seal assembly;
FIG. 4 is a schematic structural diagram of a planetary rolling mill provided by an embodiment of the invention;
FIG. 5 is a schematic structural diagram of a first seal assembly provided in accordance with an embodiment of the present invention;
FIG. 6 is an enlarged view of a portion of area A of FIG. 5;
FIG. 7 is a partial enlarged view of the area B in FIG. 5;
FIG. 8 is a schematic structural view of a second seal assembly provided in accordance with an embodiment of the present invention;
fig. 9 is a partially enlarged view of the region C in fig. 8.
Icon: 10-a main reduction gearbox; 12-heading; 14-a shield; 16-shielding gas input pipe; 18-a shielding gas branch pipe; 20-an air outlet pipeline; 22-a micro-pressure sensor; 24-a main fuel tank; 26-a first secondary fuel tank; 28-a second secondary fuel tank; 30-oil way distribution frame; 32-a first seal assembly; 321-a first labyrinth structure; 3211-labyrinth groove; 322-a second labyrinth structure; 3221-labyrinth projection; 323-first sealing strip; 324-an oil outlet pipe; 34-a second seal assembly; 341-third labyrinth structure; 342-a fourth labyrinth structure; 343-a second sealing strip; 36-support bearing seats; 38-oil inlet nozzle; 40-oil return pipe.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present embodiment provides a sealing system, please refer to fig. 2, fig. 3, and fig. 5 to fig. 9 in the drawings of the specification.
As shown in fig. 5, the sealing system includes a first seal assembly 32, and the first seal assembly 32 includes a first labyrinth structure 321 and a second labyrinth structure 322. When the first seal assembly 32 is installed on the planetary rolling mill, the first seal assembly 32 is disposed between the main reduction gearbox 10 and the chock 12. The first labyrinth structure 321 is arranged outside the second labyrinth structure 322, and forms a labyrinth seal; that is, a plurality of annular seal teeth arranged in sequence are formed at the joint of the first labyrinth 321 and the second labyrinth 322, and the plurality of seal teeth form a throttling gap and an expansion cavity, so that a step-by-step throttling effect is generated through viscous friction of a medium and transformation of the medium, and sealing is realized. And, a first sealing strip 323 is provided between the first labyrinth 321 and the second labyrinth 322.
Compared with the structure of the existing first sealing assembly 32 shown in fig. 2, the first sealing assembly 32 provided by the embodiment adds the first sealing strip 323, the first sealing strip 323 enhances the sealing effect between the first labyrinth structure 321 and the second labyrinth structure 322, and when the sealing system is installed on a planetary rolling mill, water vapor in the protective cover 14 is difficult to pass through the first sealing assembly 32 to enter the main reduction gearbox 10, so that the main reduction gearbox 10 is not easy to damage.
Meanwhile, the first sealing strip 323 enhances the sealing effect between the first labyrinth structure 321 and the second labyrinth structure 322, so that water vapor is not easy to enter a lubricating oil path from the first sealing assembly 32, and the lubricating effect of the planetary rolling mill is ensured.
Referring to fig. 6 and 7, fig. 6 is a partial enlarged view of a region a in fig. 5, fig. 7 is a partial enlarged view of a region B in fig. 5, and the first labyrinth structure 321 is provided with a labyrinth groove 3211 along an axial direction of the main drive shaft; the second labyrinth structure 322 is provided with labyrinth protrusions 3221 in the axial direction of the main drive shaft, and the labyrinth protrusions 3221 on the second labyrinth structure 322 protrude into the labyrinth grooves 3211 on the first labyrinth structure 321. The labyrinth grooves 3211 and labyrinth protrusions 3221 increase the labyrinth of the first seal assembly 32 in the radial direction of the main drive shaft, making it more difficult for water vapor within the shield 14 to pass through the first seal assembly 32.
With continued reference to fig. 6 and 7, the first labyrinth structure 321 is provided with a first mounting groove along the axial direction of the main driving shaft; the first sealing strip 323 is installed in the first installation groove, and the first sealing strip 323 abuts against the second labyrinth structure 322, so that the first labyrinth structure 321 and the second labyrinth structure 322 are sealed by the first sealing strip 323, and a path of water vapor passing through the first sealing assembly 32 is blocked. Of course, in addition to the configurations shown in fig. 6 and 7, the second labyrinth 322 may be provided with a mounting groove along the axial direction of the main drive shaft, the first seal 323 may be mounted in the mounting groove of the second labyrinth 322, and the first seal 323 may be brought into contact with the first labyrinth 321.
Referring to fig. 7, the second labyrinth structure 322 is provided with an oil outlet pipe 324, and the lubricating oil between the first labyrinth structure 321 and the second labyrinth structure 322 flows out from the oil storage pipe and flows to the main oil tank 24, or a sub-oil tank is separately provided, and the lubricating oil flowing out from the oil storage pipe flows to the sub-oil tank.
As shown in fig. 8, the sealing system also has a second seal assembly 34, and the second seal assembly 34 includes a third labyrinth 341 and a fourth labyrinth 342. The second seal assembly 34 is disposed at the forward support of the chock 12 when the second seal assembly 34 is installed in a planetary mill. The second seal assembly 34 includes a third labyrinth structure 341 and a fourth labyrinth structure 342; the third labyrinth structure 341 is installed outside the fourth labyrinth structure 342, and a second sealing strip 343 is disposed between the third labyrinth structure 341 and the fourth labyrinth structure 342.
Compared with the structure of the existing second seal assembly 34 shown in fig. 3, the second seal assembly 34 provided by the embodiment adds the second seal strip 343, and the second seal strip 343 enhances the sealing effect between the third labyrinth 341 and the fourth labyrinth 342, so that water vapor is not easy to enter the lubricating oil path from the second seal assembly 34, and the lubricating effect of the planetary rolling mill is ensured.
Referring to fig. 9, fig. 9 is a partial enlarged view of the region C in fig. 8, in which a plurality of notches are radially formed in the end surface of the third labyrinth 341 in contact with the fourth labyrinth 342, and a plurality of notches are radially formed in the end surface of the fourth labyrinth 342 in contact with the third labyrinth 341; the plurality of radial slots of the third labyrinth structure 341 correspond to the plurality of radial slots of the fourth labyrinth structure 342, forming a plurality of isolated cavities. A second mounting groove is formed in the fourth labyrinth structure 342 along the axial direction of the main driving shaft; the second sealing strip 343 is mounted in the second mounting groove, and the second sealing strip 343 abuts against the third labyrinth 341, so that the third labyrinth 341 and the fourth labyrinth 342 are sealed by the second sealing strip 343, and a path for water vapor to enter the lubricating oil passage from the second seal assembly 34 is blocked. Of course, in addition to the structure shown in fig. 9, a mounting groove may be formed in the third labyrinth 341 in the axial direction of the main drive shaft, a second seal may be mounted in the mounting groove of the third labyrinth 341, and the second seal 343 may be brought into contact with the fourth labyrinth 342.
Referring to fig. 8, the fourth labyrinth structure 342 is provided with a return pipe 40, and the lubricating oil between the third labyrinth structure 341 and the fourth labyrinth structure 342 flows out from the return pipe 40 and flows to the main oil tank 24, or a sub-oil tank is separately provided, and the lubricating oil flowing out from the return pipe 40 flows to the sub-oil tank. The fourth labyrinth 342 is further provided with an oil inlet nozzle 38 for receiving lubricating oil from the main oil tank 24 or the sub-oil tank.
The embodiment also provides a planetary rolling mill, and please refer to fig. 1 to 9 in the attached drawings of the specification together.
As shown in fig. 4, the planetary rolling mill includes the sealing system described above. A first seal assembly 32 is located between the main gearbox 10 and the chock 12. A first sealing strip 323 is arranged between the first labyrinth structure 321 and the second labyrinth structure 322, and the first sealing strip 323 enhances the sealing effect of the first sealing assembly 32, so that the water vapor in the protective cover 14 is not easy to enter the main reduction gearbox 10, and the main reduction gearbox 10 is not easy to damage. The third labyrinth 341 of the second seal assembly 34 is connected to the bearing block 36.
Fig. 1 shows the whole structure of the existing planetary rolling mill, the protective cover 14 of the existing planetary rolling mill is only provided with a protective gas input pipe 16, when a gas source transmits protective gas into the protective cover 14 through the protective gas input pipe 16, the air pressure in the protective cover 14 is increased, so that the air pressure in the protective cover 14 is larger than the air pressure in the main reduction gearbox 10, further, the water vapor in the protective cover 14 has the tendency of moving towards the main reduction gearbox 10, and the main reduction gearbox 10 is easy to feed water.
As shown in fig. 4, the planetary rolling mill of the present embodiment further includes a shielding gas input pipe 16 and a shielding gas branch pipe 18. One end of the protective gas input pipe 16 extends into the protective cover 14, and the other end is communicated with a gas source and used for conveying protective gas into the protective cover 14 to prevent metal from being oxidized in the extending process; one end of the shielding gas branch pipe 18 is communicated with the inner cavity of the main reduction gearbox 10, and the other end is communicated with the shielding gas input pipe 16. When the air source transmits the shielding gas to the shielding gas input pipe 16, part of the shielding gas in the transmission pipe is transmitted to the protective cover 14, and part of the shielding gas in the transmission pipe enters the shielding gas branch pipe 18 and flows into the main reduction gearbox 10, so that the air pressure in the main reduction gearbox 10 is consistent with the air pressure in the protective cover 14, the trend that the water vapor in the protective cover 14 moves towards the main reduction gearbox 10 is eliminated, and the probability of water inflow of the main reduction gearbox 10 is further reduced.
With continued reference to fig. 4, the sealing system further includes an outlet line 20, the outlet line 20 being mounted within the enclosure 14, and the outlet line 20 being in communication with the shielding gas input pipe 16; set up the gas outlet towards chuck 12 on the annular gas outlet pipe way 20, make the protective gas directly blow to chuck 12 position, because the metal that is prolonged and pressed is located between a plurality of chucks 12, and then the protective gas can directly blow the metal that is prolonged and pressed, realizes the accurate protection to being prolonged and pressed the metal, further prevents to be prolonged and pressed the metal and take place the oxidation.
Specifically, the gas outlet pipeline 20 is annular, and a plurality of gas outlets are arranged at intervals along the extending direction of the gas outlet pipeline 20, so that the protective gas output by the gas outlet pipe is uniform, and each position of the rolled metal can be well protected.
The shielding gas is preferably nitrogen, and may be an inert gas such as helium or argon.
As shown in fig. 4, the planetary rolling mill further includes a micro-pressure sensor 22, the micro-pressure sensor 22 is mounted on the shield 14, and is used for acquiring pressure data in the shield 14 and transmitting the pressure data to the computer, and the computer can analyze a rule of pressure change in the shield 14 according to the pressure data, so that the air pressure in the shield 14 can be adjusted according to an analysis structure, and a low positive pressure state in the shield 14 is ensured.
With continued reference to FIG. 4, the planetary rolling mill also includes a first set of secondary fuel tanks 26 and a second set of secondary fuel tanks 28. An oil outlet is formed in the second labyrinth structure 322, and an oil inlet of the first auxiliary oil tank 26 is communicated with the oil outlet of the second labyrinth structure 322 through a pipeline; specifically, the second labyrinth structure 322 is provided with an oil outlet pipe 324, the oil outlet pipe 324 communicates with a cavity between the first labyrinth structure 321 and the second labyrinth structure 322, and the oil outlet pipe 324 communicates with the oil inlet of the first sub-tank 26 via a pipe. The oil outlet of the first secondary oil tank 26 is communicated with the main oil tank 24 through a pipeline. The water vapor entering the first seal assembly 32 will condense into water, which mixes with the lubricant in the first seal assembly 32 to form an oil-water mixture. The oil-water mixture flows into the first secondary oil tank 26 after flowing out of the oil outlet pipe 324, due to the fact that the densities of the lubricating oil and the water are different, the oil-water mixture stands and stratifies in the first secondary oil tank 26, the upper layer is the lubricating oil, the lower layer is the water, the lubricating oil on the upper layer flows into the main oil tank 24, the water on the lower layer is discharged out of the first secondary oil tank 26 irregularly, water inflow of the main oil tank 24 is reduced, and the lubricating effect of the planetary rolling mill is guaranteed.
The fourth labyrinth is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet of the fourth labyrinth are communicated with the second auxiliary oil tank 28 through pipelines to form a lubricating oil circulation loop. Specifically, the oil inlet nozzle 38 of the fourth labyrinth structure 342 communicates with the second sub-tank 28 through a pipe, and the oil return pipe 40 on the fourth labyrinth structure 342 communicates with the second sub-tank 28. As the second seal assembly 34 is closer to the nip 12, more water vapor enters the second seal assembly 34 and the water content of the lubricating oil within the second seal assembly 34 is greater. The second sealing assembly 34 and the second auxiliary oil tank 28 form a circulation loop of lubricating oil, so that the second sealing assembly 34 is separated from the main oil tank 24, the water inflow of the main oil tank 24 is further reduced, and the lubricating effect of the planetary rolling mill is ensured. Of course, the oil-water mixture entering the second sub-tank 28 is still stratified, the upper layer of lubricant oil flows back to the second seal assembly 34, and the lower layer of water is discharged out of the second sub-tank 28 at irregular intervals.
Referring to fig. 1 and 4, the oil outlet of the main oil tank 24 is connected to an oil distribution frame 30, and the oil distribution frame 30 distributes the lubricating oil to the main oil tank 24 and other devices. The prior planetary rolling mill of fig. 1 does not have the second auxiliary oil tank 28, and the oil distribution frame 30 needs to distribute lubricating oil for the second sealing assembly 34. The planetary rolling mill provided by the embodiment in fig. 4 has the second auxiliary oil tank 28, and the second auxiliary oil tank 28 and the second sealing assembly 34 form a circulation loop, so that the oil distribution frame 30 does not distribute lubricating oil for the second sealing assembly 34 any more.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A sealing system, characterized in that it comprises a first sealing assembly (32) for being arranged between a main reduction gearbox (10) and a rolling head (12), and in that said first sealing assembly (32) comprises a first labyrinth structure (321) and a second labyrinth structure (322);
the first labyrinth structure (321) is installed outside the second labyrinth structure (322) to form a labyrinth seal, and a first sealing strip (323) is arranged between the first labyrinth structure (321) and the second labyrinth structure (322).
2. The sealing system according to claim 1, characterized in that the first labyrinth structure (321) is provided with a labyrinth groove (3211) along the axial direction of the main drive shaft;
the second labyrinth structure (322) is provided with a labyrinth projection (3221) along the axial direction of the main driving shaft, and the labyrinth projection (3221) extends into the labyrinth groove (3211).
3. The sealing system according to claim 1, characterized in that the first labyrinth structure (321) has a first mounting groove along the axial direction of the main drive shaft;
the first sealing strip (323) is installed in the first installation groove, and the first sealing strip (323) is abutted to the second labyrinth structure (322).
4. A sealing system according to any one of claims 1 to 3, comprising a second sealing assembly (34) for positioning at a front support of the chuck (12), and said second sealing assembly (34) comprising a third labyrinth structure (341) and a fourth labyrinth structure (342);
the third labyrinth structure (341) is installed outside the fourth labyrinth structure (342) to form a labyrinth seal, and a second sealing strip (343) is arranged between the third labyrinth structure (341) and the fourth labyrinth structure (342).
5. The sealing system according to claim 4, characterized in that the fourth labyrinth structure (342) is provided with a second mounting groove along the axial direction of the main drive shaft;
the second sealing strip (343) is installed in the second installation groove, and the second sealing strip (343) is abutted against the third labyrinth structure (341).
6. Planetary rolling mill, characterized in that it comprises a sealing system according to any one of claims 1 to 5.
7. A planetary rolling mill according to claim 6, characterized by further comprising a shielding gas input pipe (16) and a shielding gas branch pipe (18);
one end of the protective gas input pipe (16) extends into the protective cover (14), and the other end of the protective gas input pipe is communicated with a gas source;
one end of the shielding gas branch pipe (18) is communicated with the inner cavity of the main reduction gearbox (10), and the other end is communicated with the shielding gas input pipe (16).
8. The planetary rolling mill of claim 7, further comprising an outlet duct (20), the outlet duct (20) being mounted within a shield (14), and the outlet duct (20) being in communication with the shield gas input pipe (16);
the air outlet pipeline (20) is provided with an air outlet facing the rolling head (12).
9. The planetary rolling mill according to claim 8, wherein the outlet duct (20) is annular, and a plurality of the outlets are arranged at intervals along the extending direction of the outlet duct (20).
10. The planetary rolling mill of claim 6, further comprising a micro-pressure sensor (22), the micro-pressure sensor (22) being mounted to the shield (14) for acquiring pressure data within the shield (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| FR2126162A1 (en) * | 1971-02-25 | 1972-10-06 | Leipziger Kugellagerfabr | Sealing 4-high rolling mill roll neck bearings - preventing ingress of water and dirt |
| KR20010029089A (en) * | 1999-09-29 | 2001-04-06 | 이구택 | Apparatus for controlling the atmosphere of sump and loop in strip caster of twin roll |
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| CN204996825U (en) * | 2015-09-28 | 2016-01-27 | 昆山德力铜业有限公司 | A rolling mill for copper rod production |
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| JP2017190835A (en) * | 2016-04-14 | 2017-10-19 | 株式会社ジェイテクト | Bearing device and sealing device |
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