CN220870067U - Brush seal between counter-rotating shafts mounted between inner and outer rotors - Google Patents
Brush seal between counter-rotating shafts mounted between inner and outer rotors Download PDFInfo
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- CN220870067U CN220870067U CN202322680363.1U CN202322680363U CN220870067U CN 220870067 U CN220870067 U CN 220870067U CN 202322680363 U CN202322680363 U CN 202322680363U CN 220870067 U CN220870067 U CN 220870067U
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- assembly ring
- brush
- rotor
- rotating shafts
- counter
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- 238000009434 installation Methods 0.000 claims description 7
- 230000006837 decompression Effects 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 33
- 238000005299 abrasion Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000000703 high-speed centrifugation Methods 0.000 description 1
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- Sealing Devices (AREA)
Abstract
The utility model discloses a brush type seal between counter-rotating shafts arranged between an inner rotor and an outer rotor, which comprises the following components: the inner side of the outer assembly ring is sequentially provided with a front baffle, an outer rotor brush wire bundle and an intermediate baffle from front to back along the axial direction of the outer assembly ring, the outer side of the inner assembly ring is sequentially provided with an inner rotor brush wire bundle and an inner baffle from front to back along the axial direction of the inner assembly ring, the outer rotor brush wire bundle is obliquely arranged along the radial direction of the outer assembly ring and in interference fit with the inner assembly ring, and the inner rotor brush wire bundle is consistent with the oblique direction of the outer rotor brush wire bundle and in clearance fit with the outer assembly ring. The brush type seal between the opposite rotating shafts arranged between the inner rotor and the outer rotor has reasonable structure, has sealing performance and durability, and can effectively solve the problems of sealing and abrasion caused by the fact that brush wires are arranged at different positions and/or used under different working conditions in the conventional brush type seal between the opposite rotating shafts.
Description
Technical Field
The utility model provides a brush type seal between opposite rotating shafts, which is arranged between an inner rotor and an outer rotor and can be applied to the parts between the opposite rotating shafts of an engine.
Background
The relative rotation speed and differential pressure leakage channels exist between the high-pressure shaft and the low-pressure shaft of the aero-engine, so that a sealing device is required to be arranged between the double-rotor shafts. The traditional sealing of the part between the rotating shafts usually uses graphite sealing and labyrinth sealing, and the brush type sealing is gradually applied to the sealing of the part between the rotating shafts because the brush type sealing has the advantages of good sealing performance, strong radial jump capability of a rotor, long service life and the like.
At present, two brush wire mounting positions in brush type sealing between rotating shafts are respectively mounted on an inner rotor and an outer rotor, wherein the structure mounted on the inner rotor is usually in clearance fit with the brush wires, and the mounting structure is characterized in that the wear is small under the working condition of low rotating speed, the sealing effect is poor, and the sealing effect is good and the wear is large under the working condition of high rotating speed due to the centrifugal effect; the structure installed on the outer rotor usually adopts brush wire contact or interference fit, and the installation structure is characterized in that under the working condition of low rotation speed, the sealing effect is good, the abrasion is large, and under the working condition of high rotation speed, the abrasion is small due to the centrifugal effect, and the sealing effect is poor.
In summary, no matter under what working condition, the two existing mounting modes have obvious defects, and the sealing performance or the service life of the sealing structure is affected.
Therefore, a novel brush type sealing structure between opposite rotating shafts is provided, so that the brush type sealing structure has both sealing performance and durability, and the problem to be solved is urgent.
Disclosure of utility model
In view of the above, the present utility model aims to provide a brush seal between counter-rotating shafts mounted between inner and outer rotors, so as to solve the problem that the conventional brush seal structure between counter-rotating shafts cannot have both sealing performance and durability.
The technical scheme provided by the utility model is as follows: a brush seal between counter-rotating shafts mounted between inner and outer rotors, comprising: the inner rotor brush wire bundle is obliquely arranged along the radial direction of the outer assembly ring and is in interference fit with the inner assembly ring, and the inclination direction of the inner rotor brush wire bundle is consistent with that of the outer rotor brush wire bundle and is in clearance fit with the outer assembly ring.
Preferably, the brush seal between the counter shafts mounted between the inner rotor and the outer rotor further comprises an outer assembly ring clamping ring and an inner assembly ring clamping ring, wherein the outer assembly ring clamping ring and the inner assembly ring clamping ring are respectively and fixedly connected with the outer assembly ring and the inner assembly ring, and are used for respectively fixing the outer assembly ring and the inner assembly ring on the inner side of the outer rotor and the outer side of the inner rotor.
Further preferably, the inner side of the outer fitting ring and the outer side of the inner fitting ring are respectively provided with wear-resistant coatings corresponding to the inner rotor brush tows and the outer rotor brush tows.
Further preferably, the tangential planes of the front baffle and the rear baffle are trapezoidal, and the upper bottoms of the trapezoids are positioned at the free ends of the front baffle and the rear baffle.
Further preferably, the intermediate baffle is provided with axial through holes, and the axial through holes are uniformly arranged along the circumferential direction and the radial direction of the intermediate baffle.
Further preferably, a decompression chamber is provided at the front end of the tailgate.
Further preferably, the installation inclination angle of the inner rotor brush tows and the outer rotor brush tows is 25-35 degrees.
The brush type seal between the opposite rotating shafts arranged between the inner rotor and the outer rotor has reasonable structure, comprehensively has the advantages of respectively arranging the brush wires on the inner rotor and the outer rotor, effectively weakens the disadvantages of the brush wires and the outer rotor, has sealing performance and durability, and can effectively solve the sealing and abrasion problems of the brush type seal between the opposite rotating shafts caused by the arrangement of the brush wires at different positions and/or under different working conditions.
Drawings
The utility model will be described in further detail with reference to the accompanying drawings and embodiments:
FIG. 1 is a side view of a brush seal between counter-rotating shafts mounted between inner and outer rotors in accordance with the present utility model;
FIG. 2 is an enlarged view of a portion of the brush seal between counter-rotating shafts mounted between inner and outer rotors provided in accordance with the present utility model;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 4 is a view showing the brush seal between the counter-rotating shafts mounted between the inner and outer rotors according to the present utility model.
Detailed Description
The utility model will be further explained below in connection with specific embodiments, but is not limited to the utility model.
As shown in fig. 1 to 4, the present utility model provides a brush seal between counter-rotating shafts mounted between inner and outer rotors, comprising: an outer assembly ring 1 and an inner assembly ring 3 fixed on the inner side of the outer rotor 7 and the outer side of the inner rotor 6 respectively, wherein a front baffle 11, an outer rotor brush tow 12 and an intermediate baffle 13 are sequentially arranged on the inner side of the outer assembly ring 1 from front to back along the axial direction of the outer assembly ring 1, an inner rotor brush tow 31 and an inner baffle 32 are sequentially arranged on the outer side of the inner assembly ring 3 from front to back along the axial direction of the inner assembly ring 3, the outer rotor brush tow 12 is obliquely arranged along the radial direction of the outer assembly ring 1 and is in interference fit with the inner assembly ring 3 for sealing the inner assembly ring 3, and the inner rotor brush tow 31 is consistent with the oblique direction of the outer rotor brush tow 12 and is in clearance fit with the outer assembly ring 1 for sealing the outer assembly ring 1 under centrifugal effect.
The brush type seal between the opposite rotating shafts arranged between the inner rotor and the outer rotor can realize the simultaneous installation of brush wires on the inner rotor and the outer rotor through the inner assembly ring and the outer assembly ring, the inclination directions of the inner rotor brush wire bundles and the outer rotor brush wire bundles are consistent, the outer rotor brush wire bundles are in interference fit with the inner assembly ring, and the inner rotor brush wire bundles are in clearance fit with the outer assembly ring. The brush type seal can be applied to the situation that the inner rotor and the outer rotor reversely rotate, taking the installation direction of brush wires in fig. 2 and the rotation direction of the rotor in fig. 4 as examples, when the inner rotor and the outer rotor rotate at a low speed, the centrifugal effect influence is small, the excellent sealing effect of the outer rotor brush wire bundles can compensate the poor sealing effect of the inner rotor brush wire bundles, the low abrasion of the inner rotor brush wire bundles can compensate the high abrasion of the outer rotor brush wire bundles, when the inner rotor and the outer rotor rotate at a high speed, the inner rotor brush wire bundles and the outer rotor brush wire bundles are radially outwards expanded due to the centrifugal effect, the contact area of the outer rotor brush wire bundles with the inner rotor is gradually reduced, the sealing effect and the abrasion loss of the outer rotor brush wire bundles are gradually reduced, the inner rotor brush wire bundles are enhanced, when the inner rotor brush wire bundles are not completely contacted with the outer rotor assembly ring, the abrasion loss of the inner rotor brush wire bundles is basically unchanged, the whole sealing abrasion loss is small, the inner rotor brush wire bundles can completely contact the outer rotor assembly ring, the inner rotor brush wire bundles start to generate abrasion loss when the inner rotor brush wire bundles are completely contacted with the outer rotor assembly ring, and the inner rotor brush wire bundles can be completely worn down through the outer rotor assembly ring, and the abrasion loss performance of the inner rotor brush wire bundles can be guaranteed, and the wear resistance performance of the inner rotor brush wire bundles can be guaranteed, and the abrasion resistance performance can be improved, and the abrasion resistance performance can be realized.
In addition, the brush seal between the opposite rotating shafts arranged between the inner rotor and the outer rotor can also be arranged on the inner rotor and the outer rotor which rotate in the same direction, taking the installation direction of brush wires in fig. 2 as an example, when the inner rotor and the outer rotor rotate clockwise at the same time, the rotating speed of the inner rotor needs to be higher than the rotating speed of the outer rotor, when the inner rotor and the outer rotor rotate anticlockwise at the same time, the rotating speed of the inner rotor needs to be lower than the rotating speed of the outer rotor, when the inner rotor and the outer rotor rotate in the same direction at high speed and meet the conditions, the brush wires of the outer rotor gradually float upwards, the brush wires of the inner rotor gradually cling to the outer assembly ring, the included angle between the brush wires of the inner rotor and the brush wires of the outer rotor gradually increases to form staggered rotation, and the brush wires of the inner rotor can form an obstruction effect on the airflow passing through the brush wires of the outer rotor, so that the leakage quantity is reduced.
As an improvement of the technical scheme, as shown in fig. 1 to 4, the brush seal between the opposite rotating shafts mounted between the inner rotor and the outer rotor further comprises an outer assembly ring clamping ring 2 and an inner assembly ring clamping ring 4, wherein the outer assembly ring clamping ring 2 and the inner assembly ring clamping ring 4 are respectively fixedly connected with the outer assembly ring 1 and the inner assembly ring 3, and are used for respectively fixing the outer assembly ring 1 and the inner assembly ring 3 on the inner side of the outer rotor 7 and the outer side of the inner rotor 6, and preferably, the clamping ring, the assembly ring and the clamping ring are connected with the rotor through bolts.
In order to reduce the abrasion of the rotor, as an improvement of the technical solution, as shown in fig. 2 and 3, the inner side of the outer fitting ring 1 and the outer side of the inner fitting ring 3 are respectively provided with abrasion resistant coatings 5 corresponding to the inner rotor brush tow 31 and the outer rotor brush tow 12.
As an improvement of the technical solution, as shown in fig. 2 and 3, the tangential planes of the front baffle 11 and the rear baffle 32 are trapezoidal, and the upper bottoms of the trapezoids are located at the free ends of the front baffle 11 and the rear baffle 32, so that the high-pressure resistance of the front baffle and the rear baffle can be increased.
The middle baffle plate arranged between the outer rotor brush tows and the inner rotor brush tows can prevent the problem of contact interference between the outer rotor brush tows and the inner rotor brush tows under the action of high pressure difference, can also form a blocking effect on air flow and enhance sealing effect, as an improvement of the technical scheme, as shown in fig. 3, the middle baffle plate 13 is provided with the axial through holes 131, so that the pressure drop imbalance between the inner rotor brush tows and the outer rotor brush tows can be reduced, the air flow acting force born by the middle baffle plate is more balanced, the probability that brush tows deform and fatigue fracture occur in advance is reduced, the sealing performance and durability of the brush type sealing integral structure are improved, the axial through holes 131 are uniformly arranged along the circumferential direction and the radial direction of the middle baffle plate 13, 4 axial through holes are uniformly arranged along the radial direction of the rotor in a group, and 180-270 groups are preferable in the circumferential direction.
As an improvement of the technical solution, the front end of the back plate 32 is provided with a decompression chamber (not shown in the figure), and the decompression chamber can reduce the "hysteresis effect" generated by the axial pressure difference, and reduce the axial deformation of the inner rotor brush filament bundle and the friction between the inner rotor brush filament bundle and the back plate.
As an improvement of the technical scheme, the installation inclination angle of the inner rotor brush filament bundle 31 and the outer rotor brush filament bundle 12 is 25-35 degrees, and when the inner rotor brush filament bundle is installed at a small inclination angle, the inner rotor brush filament bundle is accelerated to contact with the outer assembly ring under the action of high-speed centrifugation, so that a better sealing effect is achieved; when the brush is installed at a large inclination angle, the inner rotor brush filament bundles are contacted with the outer assembly ring slowly, so that friction and abrasion of the brush filament tips are reduced.
The embodiments of the utility model have been written in an incremental manner with emphasis on the differences between the various embodiments being placed upon which similar parts may be seen.
The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.
Claims (7)
1. A brush seal between counter-rotating shafts mounted between inner and outer rotors, comprising: an outer assembly ring (1) and an inner assembly ring (3) which are respectively fixed on the inner side of an outer rotor (7) and the outer side of an inner rotor (6), wherein a front baffle (11), an outer rotor brush tow (12) and an intermediate baffle (13) are sequentially arranged on the inner side of the outer assembly ring (1) from front to back along the axial direction of the outer assembly ring (1), an inner rotor brush tow (31) and a rear baffle (32) are sequentially arranged on the outer side of the inner assembly ring (3) from front to back along the axial direction of the inner assembly ring (3), the outer rotor brush tow (12) is obliquely arranged along the radial direction of the outer assembly ring (1) and is in interference fit with the inner assembly ring (3), and the inner rotor brush tow (31) is consistent with the oblique direction of the outer rotor brush tow (12) and is in clearance fit with the outer assembly ring (1).
2. The brush seal between counter-rotating shafts mounted between inner and outer rotors according to claim 1, wherein: the outer assembly ring clamping ring (2) and the inner assembly ring clamping ring (4) are fixedly connected with the outer assembly ring (1) and the inner assembly ring (3) respectively, and are used for fixing the outer assembly ring (1) and the inner assembly ring (3) on the inner side of the outer rotor (7) and the outer side of the inner rotor (6) respectively.
3. The brush seal between counter-rotating shafts mounted between inner and outer rotors according to claim 1, wherein: the inner side of the outer assembly ring (1) and the outer side of the inner assembly ring (3) are respectively provided with a wear-resistant coating (5) corresponding to the inner rotor brush tows (31) and the outer rotor brush tows (12).
4. The brush seal between counter-rotating shafts mounted between inner and outer rotors according to claim 1, wherein: the sections of the front baffle (11) and the rear baffle (32) are trapezoidal, and the upper bottoms of the trapezoids are positioned at the free ends of the front baffle (11) and the rear baffle (32).
5. The brush seal between counter-rotating shafts mounted between inner and outer rotors according to claim 1, wherein: the middle baffle plate (13) is provided with an axial through hole (131), and the axial through hole (131) is uniformly arranged along the circumferential direction and the radial direction of the middle baffle plate (13).
6. The brush seal between counter-rotating shafts mounted between inner and outer rotors according to claim 1, wherein: the front end of the rear baffle plate (32) is provided with a decompression cavity.
7. The brush seal between counter-rotating shafts mounted between inner and outer rotors according to claim 1, wherein: the installation inclination angle of the inner rotor brush silk bundle (31) and the outer rotor brush silk bundle (12) is 25-35 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322680363.1U CN220870067U (en) | 2023-10-08 | 2023-10-08 | Brush seal between counter-rotating shafts mounted between inner and outer rotors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322680363.1U CN220870067U (en) | 2023-10-08 | 2023-10-08 | Brush seal between counter-rotating shafts mounted between inner and outer rotors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220870067U true CN220870067U (en) | 2024-04-30 |
Family
ID=90808799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322680363.1U Active CN220870067U (en) | 2023-10-08 | 2023-10-08 | Brush seal between counter-rotating shafts mounted between inner and outer rotors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220870067U (en) |
-
2023
- 2023-10-08 CN CN202322680363.1U patent/CN220870067U/en active Active
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