CN208858926U - A kind of mixing sealing structure applied in high pressure differential environment - Google Patents
A kind of mixing sealing structure applied in high pressure differential environment Download PDFInfo
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- CN208858926U CN208858926U CN201821555204.1U CN201821555204U CN208858926U CN 208858926 U CN208858926 U CN 208858926U CN 201821555204 U CN201821555204 U CN 201821555204U CN 208858926 U CN208858926 U CN 208858926U
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- end cap
- main shaft
- ring
- hole
- air blowing
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Abstract
A kind of mixing sealing structure applied in high pressure differential environment, is applied under the conditions of shorter axial dimension, to control the high-pressure fluid leakage harm of sealed environment.It includes the lip-shaped sealed ring and air blowing ring between main shaft, the bearing in the work head and main shaft that main shaft shaft end is arranged in, lip-shaped sealed ring and air blowing ring left and right settings are simultaneously equipped with end cap in the outside of the two, annular air cavity is surrounded between the end cap, lip-type packing, air blowing ring and main shaft, it is equipped with first through hole on end cap, the gas hole that first through hole and annular air cavity are connected together is equipped on air blowing ring.The sealing structure good airproof performance, and hermetic seal is realized by the compressed air of cleanliness without any pollution, and together with the sealing function of lip-shaped sealed ring, can use in very short main-axis end.
Description
Technical field
The utility model relates to bearing seal technical field, specifically a kind of mixing applied in high pressure differential environment
Sealing structure.
Background technique
The sealing of high-speed rotating shaft mostly use mechanical seal unit, magnet fluid sealing unit, compressed gas sealing unit or
Person's labyrinth seal structure, wherein mechanical seal unit and magnet fluid sealing unit belong to contact sealing, and sealing effect is good, but makes
Valence is high, axial dimension is long, is difficult to apply in certain circumstances.Compressed gas sealing unit be suitable for sealed environment and need every
From the little environment of extraneous pressure difference, when the pressure difference of the two is bigger, or there are when highly pressurised liquid, sealing state is difficult to meet
Control the technical requirements of leakage.Labyrinth seal, in shaft high speed rotation, sealing element and shaft must retain suitable gap,
Often through the method for the length for extending contact surface, the pressure of leakage is gradually reduced, the effect of sealing is finally reached, height is turned
It can not be met the requirements when strictly limiting axial dimension under fast environment.
Utility model content
The purpose of this utility model is to provide a kind of mixing sealing structure applied in high pressure differential environment, the sealing knots
Structure can be applied under the conditions of shorter axial dimension, and can prevent the high-pressure fluid of sealed environment from revealing and endanger spindle shaft
It holds.
The technical solution adopted by the utility model to solve its technical problems is that: it is a kind of to apply mixing in high pressure differential environment
Close sealing structure, characterized in that it includes between main shaft, the bearing in the work head and main shaft that main shaft shaft end is arranged in
Lip-shaped sealed ring and air blowing ring, lip-shaped sealed ring and air blowing ring left and right settings are simultaneously equipped with end cap, the end in the outside of the two
Annular air cavity is surrounded between lid, lip-type packing, air blowing ring and main shaft, first through hole is equipped on end cap, on air blowing ring
Equipped with the gas hole that first through hole and annular air cavity are connected together.
Further, left and right settings and the seal closure and pedestal that are fixedly connected are equipped in the outside of main shaft, end cap with it is close
Sealing cover, pedestal contact, and annular notch is equipped on the outer wall of air blowing ring, forms annular groove between annular notch and end cap；It is holding
The lower part of lid is provided with the second through-hole, the air flue that portion is equipped with gas nozzle and gas nozzle and first through hole are connected together on the base,
In the draining tunnel that pedestal lower part is equipped with oil extraction mouth and oil extraction mouth and the second through-hole are connected together；It is equipped on the top of seal closure
Inlet nozzle is equipped with oil return nozzle in the lower part of seal closure.
Further, O-ring seal is equipped between end cap and the contact surface of seal closure.
Further, nut is equipped between main shaft and the inner ring of bearing.
Further, it is fixedly connected between end cap and pedestal by the first screw.
The beneficial effects of the utility model are: a kind of mixing applied in high pressure differential environment provided by the utility model is close
Seal structure, work head are fixed in shaft, and the highly pressurised liquid that work head needs is entered in seal closure by inlet nozzle, in work head
Setting mixes sealing structure between bearing, i.e., realizes mixing sealing using lip-shaped sealed ring and hermetic seal.Above structure is maximum
Contact band carrys out the problem that speed is low, the service life is short under limit handling main shaft high speed rotation state, auxiliary using compressed air
Realization is helped to seal, not only cleanliness without any pollution but also pressure adjustable section, can be effectively protected main shaft bearing.In addition, the structure is also
Various impurity can be stopped to enter bearing through gap everywhere, to avoid bearing from the damage of various impurity, and then improved
The service life of main shaft bearing.The structure integral seal structure is simple, convenient and practical, does not influence spindle nose space；It shortens
The cantilever of main shaft improves main shaft rigidity.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
In figure: 1 oil return nozzle, 2 seal closures, 3 work heads, 4 first screws, 5 shafts, 6 inlet nozzles, 7 lip-type packings, 8 O
Shape sealing ring, 9 gas nozzles, 10 air blowing rings, 101 gas holes, 102 annular grooves, 11 end caps, 111 first through hole, 112 second through-holes, 12 spiral shells
Mother, 13 pedestals, 131 air flues, 132 draining tunnels, 14 second screws, 15 bearings, 16 oil extraction mouths, 17 main shafts.
Specific embodiment
As shown in Figure 1, the utility model mainly include oil return nozzle, seal closure 2, work head 3, the first screw 4, shaft 5, into
Oil nozzle 6, lip-type packing 7, O-ring seal 8, gas nozzle 9, air blowing ring 10, end cap 11, nut 12, main shaft 13, the second screw
14, bearing 15 and oil extraction mouth 16, are with reference to the accompanying drawing described in detail the utility model.
End cap 11 is a sub-assembly, two annulus including left and right settings, wherein the annulus outer diameter in left side is greater than right side
Annulus outer diameter.End cap is whole in a ring, and air blowing ring 10 is also ring structure, and annular notch is equipped on the outer wall of air blowing ring,
After air blowing ring is mounted between end cap and main shaft, annular groove is formed between annular notch and end cap.It is set on the top of air blowing ring
There is the gas hole 101 being disposed radially, the inner side and outer side of air blowing ring is connected together by gas hole.Between air blowing ring and end cap
Interference fit, is installed together by the way of press fitting.Pedestal 13 is hollow ring structure, by the between end cap and pedestal
One screw 4 is fixed together.It is equipped with gas nozzle 9 on the outer wall of pedestal, is equipped with air flue 131, gas nozzle and air flue on the base
Directly it is connected to.End cap is nested on main shaft 17, between end cap and main shaft be equipped with lip-type packing 7, lip-type packing with
It is contacted between main shaft, lip-shaped sealed ring and end cap.The left end of end cap, lip-shaped sealed ring and air blowing is arranged in lip-shaped sealed ring
It is contacted between the left side of ring, is fixed with shaft 5 in the end of main shaft, work head 3 is fixed in shaft, on main shaft
It is fixed that there are two bearing 15, the outer ring of bearing is fixedly connected with the right side of end cap, at the same time, the outer ring of bearing and pedestal
Inner wall is fixedly connected, relatively fixed between such end cap and pedestal.The inner ring of bearing is fixedly connected by nut 12 with main shaft,
Connection is relatively rotated in this way between main shaft and pedestal.
The first through hole 111 being connected to air flue is equipped on end cap, after being blown into air into air flue by gas nozzle in this way, into
Air in air entering flue enters in annular groove through first through hole, and compressed air is through overbunching and is uniformly distributed, and passes through gas hole high speed
It sprays and enters in annular air cavity, annular air cavity is surrounded by the gap between lip-shaped sealed ring, air blowing ring, end cap and main shaft.
It is fixed with oil extraction mouth 16 in the bottom of pedestal, is equipped with vertical draining tunnel 132, the lower end of draining tunnel and oil extraction in the lower part of pedestal
Mouth connection.It is equipped with the second through-hole 112 in the lower part of end cap, the second through-hole is connected to draining tunnel, passes through the second through-hole, excretion in this way
The liquid and compressed air in road and the discharge leakage of oil extraction mouth.
Seal closure 2 is hollow structure, and seal closure is fixedly connected by the second screw 14 with pedestal.Shaft and work head are all provided with
It is placed in the inner cavity of seal closure, the inner wall of seal closure right end is contacted with the big end outer wall of end cap, and in the big end and sealing of end cap
O-ring seal 8 is equipped between cover, to guarantee good leakproofness.It is equipped with inlet nozzle 6 at the top of seal closure, in seal closure
Bottom is equipped with oil return nozzle 1.
In use, being filled with compressed air into air flue by the gas nozzle 9 on pedestal, the compressed air in air flue is after through
One through-hole enters in annular groove, and subsequent compressed air is through overbunching and is evenly distributed with, and the compressed air in annular groove is through gas hole high speed ejection
To annular air cavity.Compressed air reassemble herein with it is evenly dispersed, formed annular the pressure cuff being evenly distributed, a side
The lip that lip-shaped sealed ring is lifted in face guarantees good sealing, on the other hand avoids a large amount of leakages of highly pressurised liquid, furthermore will let out
The liquid of leakage is discharged through the draining tunnel 132 on the second through-hole, pedestal.
Work head is fixed in shaft, and the highly pressurised liquid that work head needs is entered in seal closure by inlet nozzle, is being worked
Head mixes sealing structure with setting between bearing, i.e., realizes mixing sealing using lip-shaped sealed ring and hermetic seal.Above structure is most
Limits control contact band under main shaft high speed rotation state and carry out the problem that speed is low, the service life is short, utilize compressed air
Auxiliary realizes sealing, and not only cleanliness without any pollution but also pressure adjustable section, can be effectively protected main shaft bearing.In addition, the structure
Various impurity can also be stopped to enter bearing through gap everywhere, to avoid bearing from the damage of various impurity, Jin Erti
The service life of high main shaft bearing.The structure integral seal structure is simple, convenient and practical, does not influence spindle nose space；Shorten
The cantilever of main shaft improves main shaft rigidity.
Claims (5)
1. a kind of mixing sealing structure applied in high pressure differential environment, characterized in that it includes main shaft, is arranged in main shaft
The lip-shaped sealed ring and air blowing ring between bearing in the work head and main shaft of shaft end, lip-shaped sealed ring and air blowing ring or so are set
It sets and is equipped with end cap in the outside of the two, surround annular air cavity between the end cap, lip-type packing, air blowing ring and main shaft,
It is equipped with first through hole on end cap, the gas hole that first through hole and annular air cavity are connected together is equipped on air blowing ring.
2. a kind of mixing sealing structure applied in high pressure differential environment according to claim 1, characterized in that in main shaft
The seal closure and pedestal that the outside of body is equipped with left and right settings and is fixedly connected, end cap is contacted with seal closure, pedestal, in air blowing ring
Outer wall be equipped with annular notch, form annular groove between annular notch and end cap；The lower part of end cap is provided with the second through-hole,
The air flue that pedestal top is equipped with gas nozzle and gas nozzle and first through hole are connected together is equipped with oil extraction mouth in pedestal lower part and will arrange
The draining tunnel that oil nozzle and the second through-hole are connected together；It is equipped with inlet nozzle on the top of seal closure, is equipped in the lower part of seal closure
Oil return nozzle.
3. a kind of mixing sealing structure applied in high pressure differential environment according to claim 2, characterized in that in end cap
O-ring seal is equipped between the contact surface of seal closure.
4. a kind of mixing sealing structure applied in high pressure differential environment according to claim 2, characterized in that in main shaft
Nut is equipped between body and the inner ring of bearing.
5. a kind of mixing sealing structure applied in high pressure differential environment according to claim 3, characterized in that end cap with
It is fixedly connected between pedestal by the first screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821555204.1U CN208858926U (en) | 2018-09-21 | 2018-09-21 | A kind of mixing sealing structure applied in high pressure differential environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821555204.1U CN208858926U (en) | 2018-09-21 | 2018-09-21 | A kind of mixing sealing structure applied in high pressure differential environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208858926U true CN208858926U (en) | 2019-05-14 |
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ID=66418987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821555204.1U Active CN208858926U (en) | 2018-09-21 | 2018-09-21 | A kind of mixing sealing structure applied in high pressure differential environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208858926U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027237A (en) * | 2018-09-21 | 2018-12-18 | 山东洛轴所轴承研究院有限公司 | A kind of mixing sealing structure applied in high pressure differential environment |
-
2018
- 2018-09-21 CN CN201821555204.1U patent/CN208858926U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027237A (en) * | 2018-09-21 | 2018-12-18 | 山东洛轴所轴承研究院有限公司 | A kind of mixing sealing structure applied in high pressure differential environment |
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