CN220706415U - Mechanical power air seal - Google Patents
Mechanical power air seal Download PDFInfo
- Publication number
- CN220706415U CN220706415U CN202322412393.4U CN202322412393U CN220706415U CN 220706415 U CN220706415 U CN 220706415U CN 202322412393 U CN202322412393 U CN 202322412393U CN 220706415 U CN220706415 U CN 220706415U
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- ring
- sealing
- movable
- moving
- rotating shaft
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- 238000007789 sealing Methods 0.000 claims abstract description 58
- 230000003068 static effect Effects 0.000 claims abstract description 15
- 230000001502 supplementing effect Effects 0.000 claims abstract description 7
- 210000001503 joint Anatomy 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000005489 elastic deformation Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 208000032826 Ring chromosome 3 syndrome Diseases 0.000 description 10
- 208000002991 Ring chromosome 4 syndrome Diseases 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010687 lubricating oil 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
- 239000003921 oil Substances 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- -1 steam Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Mechanical Sealing (AREA)
Abstract
The utility model discloses a mechanical power gas seal, which comprises a movable ring, wherein a first movable ring and a second movable ring are sequentially sleeved on a rotating shaft; a third sealing ring is arranged in the annular groove of the second moving ring, the first moving ring and the second moving ring are spaced by a certain distance, and a pressure supplementing passage is arranged at the interval; the fixed seat, the inner fixed ring is fixed on the right side of the outer fixed ring of the mounting groove; the springs are respectively fixed on the opposite sides of the outer fixing ring and the inner fixing ring; an air charging hole is arranged between the inner fixing ring and the outer fixing ring; the inner ring surface of the air inflation block, the movable ring and the static ring are surrounded to form an air pressure cavity; the static ring is provided with two static rings which are respectively fixed at one end of the corresponding spring facing the movable ring side and keep sliding seal with the inner ring surface of the inflation block. The spring is arranged to enable the static rings at two sides to be abutted against the movable ring, so that the tightness is enhanced, and meanwhile, the abrasion loss is compensated by using the elastic deformation of the spring, and the service life is prolonged; by arranging the third sealing ring and the pressure supplementing passage, the sealing performance is enhanced by attaching the second moving coil.
Description
Technical Field
The utility model relates to the technical field of rotary sealing, in particular to a mechanical power air seal.
Background
An air seal is a device for sealing a rotating shaft, which can prevent fluid (e.g., steam, water, oil, etc.) from leaking from a gap of the shaft or prevent outside air or foreign substances from entering the gap of the shaft. The working principle of the gas seal device utilizes gas pressure to realize the sealing effect, and the performance and the structure of the gas seal are continuously improved along with the progress of industry and the requirement on energy conservation and environmental protection.
CN209309330U discloses an inflatable end face seal, and its technical scheme is characterized in that after a first stationary ring, a PTFE gasket and a second stationary ring are fixedly connected in sequence, they are fixed on a device cover; grooves are respectively arranged on the opposite end surfaces of the first stationary ring and the second stationary ring; the left end face of the first movable ring is contacted with the end face of the groove on the first stationary ring to form a rotary sealing pair; the right end face of the second movable ring is contacted with the end face of the groove on the second stationary ring to form a rotary sealing pair; grooves are respectively formed in the opposite end faces of the first movable ring and the second movable ring, and driving rings are fixedly arranged in the grooves to form static seal; the right end face area of the second movable ring is smaller than the left end face area of the first movable ring, so that the pressure intensity of the sealing end face on one side of the device can be ensured to be larger, and gas leakage from the sealing end face can be prevented.
However, this inflatable face seal has the following disadvantages: 1. the gap between the movable ring and the static ring is increased after abrasion, and the gap cannot be adjusted by itself, so that the sealing leakage amount is greatly increased, the sealing effect is affected, the service life is low, and the maintenance amount is large; 2. the driving ring is arranged at the clamping position between the first moving ring and the second moving ring, and the driving ring is pressed when the air is inflated, so that the connectivity between the driving ring and the moving ring is reduced, the driving ring is worn, and the service life of the driving ring is shortened.
Disclosure of Invention
The utility model aims to provide a mechanical power air seal to solve the problems in the background art.
A mechanical power gas seal comprises a bearing box, wherein a mounting groove, a rotating shaft arranged on the bearing box, a moving ring fixed on the rotating shaft and a stationary ring for relatively rotating the moving ring are arranged on the bearing box; the fixed seat is fixed in the mounting groove and is used for connecting the movable ring and the stationary ring, and the inflatable block used for inflatable sealing is arranged on the fixed seat and is characterized in that:
the rotating ring comprises a first rotating ring, a second rotating ring, a first rotating ring sealing ring and a third sealing ring, wherein the first rotating ring is sleeved on the rotating shaft, and a first rotating ring sealing ring is arranged on the contact surface of the first rotating ring; the second movable ring is sleeved on the rotating shaft and is positioned on one side, close to the mounting groove, of the first movable ring, an annular groove is formed around the rotating shaft, the third sealing ring is mounted in the annular groove, and a pressure supplementing passage is formed at the interval between the first movable ring and the second movable ring;
the fixing seat comprises an outer fixing ring, an inner fixing ring, a first sealing ring and a spring, wherein the inner fixing ring is fixed on the mounting groove, the first sealing ring is arranged between the inner fixing ring and the mounting groove, and the outer fixing ring is positioned on the side, away from the mounting groove, of the inner fixing ring; the springs are respectively fixed on the opposite sides of the outer fixing ring and the inner fixing ring;
the air charging block is arranged between the outer fixing ring and the inner fixing ring, and an air charging hole is formed in the upper surface of the air charging block; the inner ring surface of the inflatable block, the movable ring and the stationary ring are surrounded to form an air pressure cavity;
the two static rings are respectively fixed at one end, facing the movable ring, of the corresponding spring, and a second sealing ring is arranged on the upper side of the static ring and is in sliding sealing with the inner ring surface of the inflation block.
As a further preferable mode, the air charging hole is communicated with the air pressure cavity through an air charging passage, the shape of the air charging passage is bent and distributed around the periphery of the air charging hole body, so that the phenomenon that the instantaneous pressure is overlarge due to overlarge kinetic energy of air when the air pressure is increased is prevented, the air is charged into the mounting groove, and the work of the bearing box is affected.
As a further preferred option, the first moving ring is provided with a plurality of connecting bolts towards one side, away from the rotating shaft, of the side face of the second moving ring, the connecting bolts are distributed along the circumference of the rotating shaft, the side face, corresponding to the connecting bolts, of the second moving ring is provided with connecting slots, the length of each connecting bolt is larger than the depth of each connecting slot, so that a certain interval exists between the first moving ring and the second moving ring, a pressure supplementing passage is formed, the interval distance between the first moving ring and the second moving ring is controlled through the arrangement of the connecting bolts, and the rotation synchronism of the first moving ring and the second moving ring is realized.
As a further preferable mode, the width of the pressure compensating passage is 2-5mm, the width of the pressure compensating passage is limited to prevent the occupied space from being excessively large, and the strength of the pressure compensating passage is prevented from being reduced due to the fact that the length of the connecting bolt is excessively long.
As a further preferred aspect, the outer fixing ring, the air inflation block and the inner fixing ring are sequentially abutted through connecting bolts, and connection stability among the outer fixing ring, the air inflation block and the inner fixing ring is improved through limitation of the connecting bolts.
As a further preferred aspect, the sealing gaskets are arranged between the outer fixing ring and the air charging block, and between the inner fixing ring and the air charging block, and the distance between the movable ring and the stationary ring can be indirectly changed by changing the number of the sealing gaskets or changing the sealing gaskets with different thicknesses, and the structural tightness is increased.
As a further preferable mode, a chamfer is arranged on one side, far away from the rotating shaft, of the contact surface of the movable ring and the static ring, so that the contact area with high-pressure gas is increased, the local gas pressure is improved, and the tightness is enhanced.
Compared with the prior art, the utility model has the beneficial effects that: 1. the spring is arranged to enable the static rings at two sides to be abutted against the movable ring, so that the tightness is enhanced, the abrasion loss is compensated by using the elastic deformation of the spring, the service life of the utility model is prolonged, and the maintenance times are reduced; 2. through setting up the third sealing washer, the internal atmospheric pressure of its side intercommunication pressure compensating passageway for the third sealing washer more laminates the second rotating ring, increases the inflation seal effect when increasing the connection steadiness.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic structural diagram of a mechanical power gas seal in this embodiment.
Fig. 2 is a schematic diagram of an installation position of the mechanical power gas seal of the present embodiment.
In the figure: the device comprises a fixed seat-1, an inflatable block-2, a stationary ring-3, a movable ring-4, a mounting groove-5, a rotating shaft-6, a connecting bolt-7, an outer fixed ring-101, an inner fixed ring-102, a first sealing ring-103, a spring-104, an inflatable hole-201, an inflatable passage-202, a second sealing ring-203, an air pressure cavity-204, a sealing gasket-205, a first movable ring-401, a first movable ring sealing ring-402, a third sealing ring-403, a second movable ring-404, a connecting bolt-4011 and a pressure compensating passage-4012.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1 and 2, a mechanical power air seal comprises a box 5 and a rotating shaft 6, wherein a mounting groove 501 is formed around the rotating shaft 6 corresponding to the atmospheric side of the box 5, a fixing seat 1, a stationary ring 3 and a moving ring 4 are sleeved on the rotating shaft 6, are tightly matched with the rotating shaft 6 and synchronously rotate, and an air charging block 2 is sleeved on the outer ring surface of the stationary ring 3;
the movable ring 4 comprises a first movable ring 401, a second movable ring 404, a first movable ring sealing ring 402 and a third sealing ring 403, wherein the first movable ring 401 is sleeved on the rotating shaft 6, and the contact surface of the first movable ring 401 and the rotating shaft is embedded with the first movable ring sealing ring 402; the second moving ring 404 is sleeved on the rotating shaft 6, and compared with the first moving ring 401, the inner ring surface of the second moving ring 404 is closer to the medium side, an annular groove is formed on the side, close to the first moving ring 401, of the second moving ring 404, the third sealing ring 403 is installed in the annular groove, the space between the moving ring 4 and the rotating shaft 6 is sealed by the first moving ring sealing ring 402 and the third sealing ring 403, and the space between the first moving ring 401 and the second moving ring 404 is a pressure compensating passage 4012 through a connecting bolt 4011;
the connecting bolts 4011 are positioned on the first movable ring 401 and face the side face of the second movable ring 404, a plurality of connecting bolts 4011 are circumferentially distributed by taking the rotating shaft 6 as a circle center, connecting slots are arranged on the side face of the second movable ring 404 corresponding to the connecting bolts 4011, and the length of each connecting bolt 4011 is larger than the depth of each connecting slot, so that a pressure compensating passage 4012 is formed between the opposite side face of the first movable ring 401 and the second movable ring 404 and between the first movable ring 401 and the third sealing ring 403, the spacing distance between the first movable ring 401 and the second movable ring 404 is controlled through the connecting bolts 4011, and the rotation synchronism of the first movable ring 401 and the second movable ring 404 is ensured; the axial width of the pressure compensating passage 4012 is 2-5mm, and the width of the pressure compensating passage 4012 is limited to prevent the occupation space from being excessively large and the strength of the connecting bolt 4011 from being reduced due to the excessively long length.
The fixing seat 1 comprises an outer fixing ring 101, an inner fixing ring 102, a first sealing ring 103 and a spring 104, wherein the inner fixing ring 102 and the outer fixing ring 101 are sleeved on the rotating shaft 6 and respectively correspond to the atmosphere side and the medium side, the inner fixing ring 102 is fixed on the mounting groove 5, and the first sealing ring 103 is arranged between the side surface of the inner fixing ring 102 facing the medium side and the mounting groove 5; the springs 104 are respectively fixed in grooves on opposite sides of the outer fixing ring 101 and the inner fixing ring 102.
The air charging block 2 is arranged between the outer fixing ring 101 and the inner fixing ring 102, and the upper surface of the air charging block is provided with radial air charging holes 201; the inner ring surface of the inflatable block 2 surrounds the movable ring 4 and the static ring 3 to form an air pressure cavity 204; the air charging hole 201 is communicated with the air pressure cavity 204 through an air charging passage 202, and the air charging passage 202 is bent and distributed around the air charging hole 201 body, so that the phenomenon that the instantaneous pressure is overlarge due to overlarge gas kinetic energy when the air pressure is increased is prevented, and the gas is charged into the groove body of the mounting groove 5 to influence the normal operation of the bearing box.
The two stationary rings 3 are respectively fixed at one end of the corresponding spring 104 facing the movable ring 4, and the inner ring surface of the inflatable block 2 is correspondingly provided with a mounting groove for mounting a second sealing ring 203 tightly matched with the outer ring surface of the stationary ring 3, so that the stationary ring 3 and the inner ring surface of the inflatable block 2 are kept in sliding sealing.
In the embodiment of the present utility model, as shown in fig. 1, a chamfer is disposed on a side of the contact surface between the movable ring 4 and the stationary ring 3, which is far away from the rotation shaft 6, so as to increase the contact area with high-pressure gas, improve the local gas pressure, and enhance the tightness.
As shown in fig. 2, in the embodiment of the present utility model, the outer fixing ring 101, the inflatable block 2 and the inner fixing ring 102 are sequentially abutted by three connecting bolts 7 circumferentially arranged, and the connection stability among the outer fixing ring 101, the inflatable block 2 and the inner fixing ring 102 is improved by the limitation of the connecting bolts 7.
As shown in fig. 1, in the embodiment of the present utility model, the sealing gaskets 205 are respectively disposed between the outer fixing ring 101 and the air-filling block 2 and between the inner fixing ring 102 and the air-filling block 2, and by changing the number of the sealing gaskets 205 or changing the sealing gaskets 205 with different thicknesses, the distance between the movable ring 4 and the stationary ring 3 can be indirectly changed, and the structural tightness is increased.
The working process of the utility model is as follows: 1. and (3) air-filling sealing: by filling gas into the gas pressure cavity 204, the gas pressure at the contact surface between the first movable ring 401 and the second movable ring 404 and the corresponding stationary ring 3 is increased, so that the effect of blocking external pollution at the contact surface of the first movable ring 401 is further achieved, lubricating oil is prevented from leaking from the contact surface between the second movable ring 404 and the stationary ring 3, and meanwhile, the gas pressure at the pressure supplementing passage 4012 is increased, so that the third sealing ring 403 is more attached to the second movable ring 404, and meanwhile, the gas filling sealing effect is increased; 2. compensating for wear: the spring 104 is arranged to enable the static rings 3 on two sides to be abutted against the movable ring 4, so that the tightness is enhanced, meanwhile, the elastic deformation quantity of the spring 104 is used for compensating the abrasion quantity, the service life of the utility model is prolonged, and the maintenance times are reduced.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (7)
1. A mechanical power gas seal comprises a bearing box, wherein a mounting groove, a rotating shaft arranged on the bearing box, a moving ring fixed on the rotating shaft and a stationary ring for relatively rotating the moving ring are arranged on the bearing box; the fixing seat is fixed in the mounting groove and is used for connecting the movable ring and the stationary ring, and the inflating block which is arranged on the fixing seat and is used for inflating and sealing is arranged on the fixing seat, and the fixing seat is characterized in that:
the rotating ring comprises a first rotating ring, a second rotating ring, a first rotating ring sealing ring and a third sealing ring, wherein the first rotating ring is sleeved on the rotating shaft, and a first rotating ring sealing ring is arranged on the contact surface of the first rotating ring; the second movable ring is sleeved on the rotating shaft and is positioned on one side, close to the mounting groove, of the first movable ring, an annular groove is formed around the rotating shaft, the third sealing ring is mounted in the annular groove, and a pressure supplementing passage is formed at the interval between the first movable ring and the second movable ring;
the fixing seat comprises an outer fixing ring, an inner fixing ring, a first sealing ring and a spring, wherein the inner fixing ring is fixed on the mounting groove, the first sealing ring is arranged between the inner fixing ring and the mounting groove, and the outer fixing ring is positioned on the side, away from the mounting groove, of the inner fixing ring; the springs are respectively fixed on the opposite sides of the outer fixing ring and the inner fixing ring;
the air charging block is arranged between the outer fixing ring and the inner fixing ring, and an air charging hole is formed in the upper surface of the air charging block; the inner ring surface of the inflatable block, the movable ring and the stationary ring are surrounded to form an air pressure cavity;
the two static rings are respectively fixed at one end, facing the movable ring, of the corresponding spring, and a second sealing ring is arranged on the upper side of the static ring and is in sliding sealing with the inner ring surface of the inflation block.
2. The mechanical power gas seal of claim 1, wherein: the air charging holes are communicated with the air pressure cavity through air charging passages, and the air charging passages are bent in shape and distributed around the air charging holes.
3. The mechanical power gas seal of claim 1, wherein: the first moving ring is provided with connecting bolts towards one side, away from the rotating shaft, of the side face of the second moving ring, the connecting bolts are distributed along the circumference of the rotating shaft, connecting slots are formed in the side face, corresponding to the connecting bolts, of the second moving ring, the length of each connecting bolt is larger than the depth of each connecting slot, and a certain interval exists between the first moving ring and the second moving ring, so that a pressure supplementing passage is formed.
4. A mechanical power gas seal according to claim 3, characterized in that: the width of the pressure compensating passage is 2-5mm.
5. The mechanical power gas seal of claim 1, wherein: the outer fixing ring, the inflatable block and the inner fixing ring are sequentially in butt joint and fixed through connecting bolts.
6. The mechanical power gas seal of claim 1, wherein: and a sealing gasket is arranged between the outer fixing ring and the air inflation block and between the inner fixing ring and the air inflation block.
7. The mechanical power gas seal of claim 1, wherein: and a chamfer is arranged on one side of the contact surface of the movable ring and the static ring, which is far away from the rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322412393.4U CN220706415U (en) | 2023-09-06 | 2023-09-06 | Mechanical power air seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322412393.4U CN220706415U (en) | 2023-09-06 | 2023-09-06 | Mechanical power air seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220706415U true CN220706415U (en) | 2024-04-02 |
Family
ID=90439702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322412393.4U Active CN220706415U (en) | 2023-09-06 | 2023-09-06 | Mechanical power air seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220706415U (en) |
-
2023
- 2023-09-06 CN CN202322412393.4U patent/CN220706415U/en active Active
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