CN210564675U - Labyrinth seal structure capable of actively controlling clearance - Google Patents
Labyrinth seal structure capable of actively controlling clearance Download PDFInfo
- Publication number
- CN210564675U CN210564675U CN201921359031.0U CN201921359031U CN210564675U CN 210564675 U CN210564675 U CN 210564675U CN 201921359031 U CN201921359031 U CN 201921359031U CN 210564675 U CN210564675 U CN 210564675U
- Authority
- CN
- China
- Prior art keywords
- rotor
- seat
- comb
- clearance
- arc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 244000126211 Hericium coralloides Species 0.000 claims description 42
- 238000007789 sealing Methods 0.000 claims description 42
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 239000012634 fragment Substances 0.000 claims 1
- 238000005299 abrasion Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Images
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model discloses a but labyrinth seal structure of initiative clearance control, include: stator seal receptacle, broach seat, broach, rotor and clearance adjustment structure, wherein, stator seal receptacle is fixed to be set up in the periphery of rotor, and the broach seat is a plurality of, sets up along the circumference clearance of rotor, and the outside annular end of broach seat sets up in the annular cavity of stator seal receptacle, and the clearance adjustment structure can promote whole broach seat along the axial of rotor and radial motion, and the broach is the multirow, and fixed the inner terminal surface that sets up in the inside annular end of broach seat, and set up along the axial interval of rotor, and the periphery of rotor is provided with the overhanging boss of multirow along its axial interval, overhanging boss just can form the ring chamber with the broach one-to-one. This but labyrinth seal structure of active clearance control, it is rational in infrastructure, can initiatively adjust the radial clearance and the axial clearance of broach and rotor through clearance adjustment structure, improved because of the rotor beats the friction and the collision loss that arouses, improved sealed performance of obturating.
Description
Technical Field
The utility model relates to a be applied to the dynamic seal structure among the rotating machinery, provide a labyrinth seal structure that can initiative clearance control very much.
Background
Since the birth of the aviation gas turbine engine, the sealing of gas and liquid becomes one of the main problems, in the modern aviation power device, labyrinth seal is widely used as an important sealing element, the development of the engine performance is greatly influenced by the sealing performance, and the performance, the reliability, the service life and the maintainability of the engine are greatly influenced. The labyrinth seal is a non-contact seal which utilizes sudden expansion and sudden contraction of a channel to increase flow resistance so as to limit fluid leakage, is an effective and long-life sealing structure widely used in an aircraft engine, and is mainly used for gas compressor and turbine interstage, top of blades, cooling flow path system, gas isolation, oil-gas isolation in a main bearing cavity lubricating oil sealing system and the like. As is known, the turbine flow path is an annular passage, the gas pressure and temperature decrease in the axial direction (from front to back), and there is a pressure difference for each row of moving blades or stator blades. The turbine rotor and the stator inevitably leave gaps, gas fluid leakage inevitably occurs, and therefore sealing devices need to be adopted at the positions, firstly, energy losses of pressure energy, heat energy and the like caused by working fluid leakage are reduced, so that the turbine efficiency is improved, secondly, the reliability and the durability of a hot-end part of the turbine are improved, and the structural integrity of an engine is ensured. Practical applications of aircraft engines have shown that advanced labyrinth seals can effectively improve engine performance.
In the process from rest to start of the airplane, the rotating speed of the rotor can be rapidly increased, the change of the runout amount of the rotor is large, the clearance between the rotor and the stator becomes small, and the abrasion is easy to generate; when the airplane enters a cruising state, the clearance between the rotor and the stator tends to be stable, but the clearance between the rotor and the stator is larger at the moment, the leakage amount is large, the duration period of the cruising state of the airplane is long, and the fuel consumption is large; when the aircraft enters a parking stage, the change of the runout amount of the rotor is large, the gap between the rotor and the stator becomes small, and abrasion is easy to generate.
Therefore, it is a problem to be solved how to solve the problems that the rotor is too small in the interval with the stator in the starting and stopping states to easily generate abrasion, and the rotor is too large in the gap with the stator in the stable state to easily generate leakage.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a but labyrinth seal structure of initiative clearance control to solve traditional labyrinth seal structure easy wearing and tearing, let out leakage quantity great, the relatively poor scheduling problem of sealing performance.
The utility model provides a technical scheme is: an actively clearance-controllable labyrinth seal structure, comprising: the comb-tooth structure comprises a stator sealing seat, a plurality of comb-tooth seats, comb teeth, a rotor and a gap adjusting structure, wherein the stator sealing seat is fixedly arranged on the periphery of the rotor, the comb-tooth seats are arranged along the circumferential gap of the rotor, the outer annular end of each comb-tooth seat is arranged in the annular cavity of the stator sealing seat, the gap adjusting structure can push the whole comb-tooth seat to move along the axial direction and the radial direction of the rotor, the inner annular end of each comb-tooth seat is positioned outside the stator sealing seat and matched with the periphery of the rotor, the comb teeth are in a plurality of rows and fixedly arranged on the inner end face of the inner annular end of each comb-tooth seat and arranged along the axial direction of the rotor at intervals, the periphery of the rotor is provided with a plurality of rows of outward-extending bosses which correspond to the comb teeth one to one and can form an annular cavity, and the gap adjusting structure comprises a first arc wedge block, a second arc wedge block, a, the first arc wedge block and the second arc wedge block are located in an annular cavity of the stator sealing seat and are respectively connected with two side faces of an outer annular end of the comb tooth seat through inclined planes, the flat-bottom screw and the spring are arranged oppositely, the flat-bottom screw penetrates through one side wall of the stator sealing seat and then abuts against the first arc wedge block, the spring is fixed between the second arc wedge block and the other side wall of the stator sealing seat, the concave elastic pieces are symmetrically arranged relative to the comb tooth seat and provide supporting force for the comb tooth seat to be far away from the rotor, the flat-bottom screw can be screwed up to push the comb tooth seat to move along the axial direction of the rotor, when the spring is compressed to the limit, the flat-bottom screw is continuously screwed up, the first arc wedge block and the second arc wedge block can push the comb tooth seat to overcome the supporting force of the concave elastic pieces.
Preferably, the section of the stator sealing seat is rectangular with an opening at the bottom edge, an annular cavity matched with the outer annular end of the comb tooth seat is formed in the middle of the stator sealing seat, and an annular opening is formed in the center of the lower bottom surface of the stator sealing seat.
Preferably, the stator sealing seat is provided with spring plate slideways symmetrically on the lower bottom surface, the lower part of the concave spring plate is arranged in the spring plate slideways, and the upper part of the concave spring plate is fixed with the outer annular end of the comb tooth seat.
Further preferably, the second arc-shaped wedge block and the stator sealing seat are both provided with spring grooves corresponding to the springs.
Preferably, the number of the comb tooth seats is four, and the comb tooth seats are identical in structure.
More preferably, the comb teeth are shaped like a shoe, and the overhanging projection is shaped like an inverted shoe.
The utility model provides a but labyrinth seal structure of initiative clearance control's beneficial effect as follows:
1. compared with the traditional labyrinth sealing structure, the utility model adopts the active mechanical control to adjust the flat bottom screw, can ensure that the sealing structure has low leakage and small abrasion loss when the rotor is started and stopped, and can keep the minimum clearance between the comb teeth and the rotor when the rotor is in a stable working state, thereby further reducing the leakage;
2. for traditional labyrinth seal structure, the utility model discloses not only considered the radial runout of rotor in the course of the work, considered the axial runout of rotor in the course of the work moreover, protected this seal structure in the at utmost, reduced wearing and tearing.
3. For traditional labyrinth seal structure, the utility model discloses can adjust the radial clearance between broach and the rotor face under the condition that does not tear sealing device open, can obviously improve labyrinth seal's sealing performance, reduce use cost, have good economic benefits.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and embodiments:
fig. 1 is a schematic structural diagram of a labyrinth seal structure capable of active clearance control according to the present invention in a rotor starting or stopping state;
3 FIG. 3 2 3 is 3 a 3 cross 3- 3 sectional 3 view 3 A 3- 3 A 3 of 3 FIG. 3 1 3; 3
Fig. 3 is a schematic structural view of the labyrinth seal structure capable of active clearance control provided by the present invention in a stable working state of the rotor;
fig. 4 is a sectional view B-B of fig. 3.
Detailed Description
The invention will be further explained below with reference to specific embodiments, without limiting the invention.
As shown in fig. 1 to 4, the utility model provides a but labyrinth seal structure of active clearance control, include: stator seal receptacle 1, broach seat 2, broach 3, rotor 4 and clearance adjustment structure, wherein, stator seal receptacle 1 is fixed to be set up in the periphery of rotor 4, broach seat 2 is a plurality of, sets up along the circumference clearance of rotor 4, and the outside annular end of broach seat 2 sets up in the annular cavity of stator seal receptacle 1, and clearance adjustment structure can promote whole broach seat 2 along the axial of rotor 4 and radial motion, and the inside annular end of broach seat 2 is located stator seal receptacle 1 outside and with the periphery cooperation of rotor 4, and broach 3 is the multirow, fixed setting in the interior terminal surface of the inside annular end of broach seat 2, and set up along the axial interval of rotor 4, and the periphery of rotor 4 is provided with the overhanging boss 41 of multirow along its axial interval, overhanging boss 41 and broach 3 one-to-one and can form the annular cavity, clearance adjustment structure includes that first arc wedges 5, The second arc-shaped wedge block 6, the flat-bottom screw 7, the spring 8 and the concave elastic sheet 9, wherein the first arc-shaped wedge block 5 and the second arc-shaped wedge block 6 are both positioned in the annular cavity of the stator sealing seat 1 and are respectively connected with two side surfaces of the outer annular end of the comb tooth seat 2 through inclined surfaces, the flat-bottom screw 7 and the spring 8 are oppositely arranged, the flat-bottom screw 7 penetrates through one side wall of the stator sealing seat 1 and then abuts against the first arc-shaped wedge block 5, the spring 8 is fixed between the second arc-shaped wedge block 6 and the other side wall of the stator sealing seat 1, the concave elastic sheet 9 is symmetrically arranged relative to the comb tooth seat 2 to provide supporting force far away from the rotor 4 for the comb tooth seat 2, the comb tooth seat 2 can be pushed to move along the axial direction of the rotor 4 by screwing the flat-bottom screw 7, when the spring 8 is compressed to the limit, the flat-bottom screw 7 is continuously screwed, the first arc-shaped wedge block 5 and the second arc, reducing the radial distance of the comb teeth 3 from the rotor 4, in particular: as shown in fig. 1 and 3, the end surfaces of both sides of the outer annular end of the comb tooth holder are inclined surfaces, and the first arc-shaped wedge block and the second arc-shaped wedge block are in contact with the inclined surface of the outer annular end of the comb tooth holder.
According to the labyrinth seal structure capable of actively controlling the clearance, the radial clearance and the axial clearance between the comb teeth and the rotor can be actively adjusted through the clearance adjusting structure, not only is the radial runout of the rotor in the working process considered, but also the axial movement of the rotor is considered, and the friction and collision losses caused by the runout of the rotor are greatly improved; specifically, the method comprises the following steps: the labyrinth seal structure capable of actively controlling the clearance can adopt the active mechanical control to adjust the flat bottom screw on the premise of ensuring that the leakage amount is low, can realize the clearance adjustment of the labyrinth seal and the rotor surface under three states of rotor starting, stable working and stopping, as shown in figure 1, the abrasion loss is reduced as much as possible under the condition of ensuring that the leakage amount is low under the states of rotor starting and stopping, and can protect the seal structure to the maximum extent, as shown in figure 3, the flat bottom screw is adjusted under the state of stable working of the rotor, so that the clearance between the comb teeth and the rotor surface is reduced, a ring cavity is formed, the leakage amount is further reduced, meanwhile, the abrasion loss is minimized, in addition, the labyrinth seal structure capable of actively controlling the clearance can adjust the radial clearance between the comb teeth and the rotor surface under the condition of not dismounting the seal device, the sealing performance of the labyrinth seal can be obviously improved, and, has good economic benefit.
The adjusting process of the labyrinth seal structure capable of actively controlling the clearance under the stable working state of the rotor is as follows: when the rotor works stably, the flat-bottom screw is screwed, the spring is compressed, the comb tooth seat and the arc wedge block move horizontally together under the action of axial force provided by the flat-bottom screw, the comb teeth and the outward-extending boss form an annular cavity, when the spring is compressed to the limit, the flat-bottom screw is continuously screwed, radial component force is generated due to the fact that the arc wedge block is in inclined surface contact with the comb tooth seat, the comb tooth seat moves inwards along the radial direction of the rotor, at the moment, the gap between the comb teeth and the rotor surface is reduced, and leakage amount can be further reduced.
As an improvement of the technical scheme, as shown in fig. 1 and 3, the section of the stator seal seat 1 is rectangular with an opening at the bottom edge, an annular cavity matched with the outer annular end of the comb tooth seat 2 is formed in the middle of the stator seal seat 1, and an annular opening is formed in the center of the lower bottom surface of the stator seal seat 1.
As an improvement of the technical scheme, elastic sheet slideways are symmetrically arranged on the lower bottom surface of the stator sealing seat 1, the lower part of the concave elastic sheet 9 is arranged in the elastic sheet slideways, and the upper part of the concave elastic sheet is fixed with the outer annular end of the comb tooth seat 2.
As the improvement of the technical scheme, the second arc-shaped wedge block 6 and the stator sealing seat 1 are respectively provided with a spring groove corresponding to the spring 8, and at the moment, when the second arc-shaped wedge block moves to abut against the stator sealing seat, the distance between the comb teeth and the rotor can be adjusted by continuously screwing the flat-bottom screw.
As an improvement of the technical scheme, as shown in fig. 2 and 4, the number of the comb tooth holders 2 is four, and the structures are the same.
As a technical improvement, as shown in fig. 1 and 3, the comb teeth 3 are shaped like a shoe, the overhanging boss 41 is shaped like an inverted shoe, the shoe-shaped design of the comb teeth and the inverted shoe-shaped design of the overhanging boss are matched with each other, and the comb teeth and the overhanging boss form an annular cavity in a stable working state of the rotor, so that the leakage amount can be further reduced.
The embodiments of the present invention are written in a progressive manner, emphasizing the differences of the various embodiments, and similar parts can be referred to each other.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (6)
1. An actively clearance-controllable labyrinth seal, comprising: the comb-tooth structure comprises a stator sealing seat (1), a plurality of comb-tooth seats (2), comb teeth (3), a rotor (4) and a gap adjusting structure, wherein the stator sealing seat (1) is fixedly arranged at the periphery of the rotor (4), the plurality of comb-tooth seats (2) are arranged along the circumferential gap of the rotor (4), the outer annular end of each comb-tooth seat (2) is arranged in an annular cavity of the stator sealing seat (1), the gap adjusting structure can push the whole comb-tooth seat (2) to move along the axial direction and the radial direction of the rotor (4), the inner annular end of each comb-tooth seat (2) is positioned outside the stator sealing seat (1) and matched with the periphery of the rotor (4), the comb teeth (3) are arranged in a plurality of rows, are fixedly arranged on the inner end face of the inner annular end of each comb-tooth seat (2) and are arranged along the axial direction of the rotor (4) at intervals, and the periphery of the rotor (4) is provided with a plurality of outward extending, the outward extending bosses (41) correspond to the comb teeth (3) one by one and can form an annular cavity, the gap adjusting structure comprises a first arc-shaped wedge block (5), a second arc-shaped wedge block (6), flat-bottom screws (7), springs (8) and concave elastic pieces (9), wherein the first arc-shaped wedge block (5) and the second arc-shaped wedge block (6) are both positioned in the annular cavity of the stator sealing seat (1) and are respectively connected with two side surfaces of the outer annular end of the comb tooth seat (2) through inclined surfaces, the flat-bottom screws (7) and the springs (8) are arranged oppositely, the flat-bottom screws (7) penetrate through one side wall of the stator sealing seat (1) and are abutted against the first arc-shaped wedge block (5), the springs (8) are fixed between the second arc-shaped wedge block (6) and the other side wall of the stator sealing seat (1), the concave elastic pieces (9) are symmetrically arranged relative to the comb tooth seat (2) and provide supporting force far away from the rotor (4) for the comb tooth seat (, through screwing up flat-bottom screw (7), can promote broach seat (2) along the axial motion of rotor (4), when spring (8) compression to the limit, continue to screw up flat-bottom screw (7), first arc wedge (5), second arc wedge (6) can promote broach seat (2) and overcome the holding power of spill shell fragment (9), reduce the radial distance of broach (3) and rotor (4).
2. The actively clearance controlled labyrinth seal as recited in claim 1, wherein: the section of the stator sealing seat (1) is a rectangle with an opening at the bottom edge, the middle part of the stator sealing seat (1) forms an annular cavity matched with the external annular end of the comb tooth seat (2), and the central position of the lower bottom surface of the stator sealing seat (1) forms an annular opening.
3. The actively clearance controlled labyrinth seal as recited in claim 2, wherein: elastic piece slideways are symmetrically arranged on the lower bottom surface of the stator sealing seat (1), the lower part of the concave elastic piece (9) is arranged in the elastic piece slideways, and the upper part of the concave elastic piece is fixed with the outer annular end of the comb tooth seat (2).
4. The actively clearance controlled labyrinth seal as recited in claim 1, wherein: spring grooves corresponding to the springs (8) are formed in the second arc-shaped wedge blocks (6) and the stator sealing seat (1).
5. The actively clearance controlled labyrinth seal as recited in claim 1, wherein: the number of the comb tooth seats (2) is four, and the structures of the comb tooth seats are the same.
6. The actively clearance controlled labyrinth seal as recited in claim 1, wherein: the comb teeth (3) are shoe-shaped, and the outward extending bosses (41) are inverted shoe-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921359031.0U CN210564675U (en) | 2019-08-21 | 2019-08-21 | Labyrinth seal structure capable of actively controlling clearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921359031.0U CN210564675U (en) | 2019-08-21 | 2019-08-21 | Labyrinth seal structure capable of actively controlling clearance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210564675U true CN210564675U (en) | 2020-05-19 |
Family
ID=70629026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921359031.0U Expired - Fee Related CN210564675U (en) | 2019-08-21 | 2019-08-21 | Labyrinth seal structure capable of actively controlling clearance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210564675U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439631A (en) * | 2019-08-21 | 2019-11-12 | 沈阳航空航天大学 | It is a kind of can active clearance control labyrinth seal structure |
-
2019
- 2019-08-21 CN CN201921359031.0U patent/CN210564675U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439631A (en) * | 2019-08-21 | 2019-11-12 | 沈阳航空航天大学 | It is a kind of can active clearance control labyrinth seal structure |
| CN110439631B (en) * | 2019-08-21 | 2024-05-28 | 沈阳航空航天大学 | Labyrinth sealing structure capable of controlling active clearance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113028067B (en) | Self-adaptive labyrinth sealing device for high-speed shaft | |
| CN110439631B (en) | Labyrinth sealing structure capable of controlling active clearance | |
| CN210564675U (en) | Labyrinth seal structure capable of actively controlling clearance | |
| CN108194406B (en) | It is a kind of can the late release moment mechanically-sealing apparatus | |
| CN109372920A (en) | A kind of waveform spring | |
| CN113090337A (en) | Reverse shaft sealing device for double-rotor aircraft engine | |
| CN209875952U (en) | Dynamic sealing device suitable for high speed and high pressure and aircraft | |
| CN113107615B (en) | Active clearance control labyrinth seal structure based on eccentric damping action | |
| CN206035537U (en) | Engine rotor with radial reliable seal structure | |
| CN202832957U (en) | Oil distribution device used for hydraulic motor | |
| CN210240531U (en) | Combined piston top land ring, piston assembly and internal combustion engine | |
| CN111207176A (en) | Comb tooth sealed squeeze film damper | |
| CN201330623Y (en) | Bearing adjustable contact type sealing device of turbogenerator set | |
| CN112012800B (en) | Seal structure of grid tray and braid combination | |
| CN111927634B (en) | Bearing chamber non-contact graphite sealing structure | |
| CN211951293U (en) | Comb tooth sealed squeeze film damper | |
| CN210068335U (en) | Sealed combined piston ring, piston assembly and internal combustion engine | |
| CN111306301A (en) | Rotary vane type high-temperature high-pressure gas (liquid) elastic contact dynamic sealing device and preparation method | |
| CN212407567U (en) | Rotary-vane type high-temperature high-pressure gas or liquid elastic contact type dynamic sealing device | |
| CN111306304A (en) | Rotary-vane type high-temperature high-pressure gas (liquid) elastic contact dynamic sealing device and preparation method | |
| RU131814U1 (en) | TURBOMETER RADIAL GAP CELL SEAL | |
| CN201672051U (en) | Gas-sealing piston ring and piston | |
| CN217558529U (en) | Plunger pump plunger independent cooling system capable of prolonging service life of plunger seal | |
| CN111927633B (en) | Graphite sealing structure with anti-fishbone dynamic pressure groove | |
| CN218325045U (en) | Engine piston ring convenient to position |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200519 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |