CN113606345B - Air seal assembly and air seal ring - Google Patents
Air seal assembly and air seal ring Download PDFInfo
- Publication number
- CN113606345B CN113606345B CN202110683387.5A CN202110683387A CN113606345B CN 113606345 B CN113606345 B CN 113606345B CN 202110683387 A CN202110683387 A CN 202110683387A CN 113606345 B CN113606345 B CN 113606345B
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- Prior art keywords
- limiting
- air seal
- groove
- hole
- limiting groove
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- 230000000670 limiting effect Effects 0.000 claims abstract description 118
- 238000007789 sealing Methods 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 13
- 238000012545 processing Methods 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
Classifications
-
- 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
- F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B1/00—Devices for securing together, or preventing relative movement between, constructional elements or machine parts
- F16B1/02—Means for securing elements of mechanisms after operation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Fluid Mechanics (AREA)
- Gasket Seals (AREA)
Abstract
本发明公开了一种气封组件，包括：气封本体，所述气封本体装设在静子部件上；至少两个限位件，所述气封本体的第一端面和第二端面开设有第一限位槽，所述静子部件的首端和尾端开设有第二限位槽，所述限位件的底端插入所述第一限位槽和所述第二限位槽中；至少两个锁紧件，所述静子部件的首端和尾端开设有螺孔，所述锁紧件旋入所述螺孔内并将所述限位件固定在所述第二限位槽中；其中，所述限位件底端与所述第一限位槽底面之间预留有热膨胀间隙。实现气封本体限位装配在静子部件上，气封本体在后期使用中不容易发生移位，有效解决气封本体易变椭的问题；且预留有膨胀间隙，确保气封本体可以自由热膨胀。
The present invention discloses an air seal assembly, comprising: an air seal body, the air seal body is mounted on a stator component; at least two limiting members, the first end face and the second end face of the air seal body are provided with a first limiting groove, the head end and the tail end of the stator component are provided with a second limiting groove, the bottom end of the limiting member is inserted into the first limiting groove and the second limiting groove; at least two locking members, the head end and the tail end of the stator component are provided with screw holes, the locking members are screwed into the screw holes and fix the limiting member in the second limiting groove; wherein a thermal expansion gap is reserved between the bottom end of the limiting member and the bottom surface of the first limiting groove. The air seal body is limitedly assembled on the stator component, the air seal body is not easily displaced in later use, and the problem that the air seal body is easy to become elliptical is effectively solved; and an expansion gap is reserved to ensure that the air seal body can expand freely by heat.
Description
Technical Field
The invention relates to an axially-mounted air seal ring structure for rotary machinery, in particular to an air seal assembly and an air seal ring.
Background
Air seals are widely used in rotary machines. The air seal ring is generally divided into an upper half and a lower half, and for the air seal ring with a T-shaped groove, the air seal ring can be divided into a plurality of arc sections for convenient installation and can be assembled in a sliding manner. Because the processing stress is generated in the production and processing, and the air seal ring is a thin-wall rotary body part, the air seal ring is easy to become elliptic in later use, and when the unit operates at a large temperature change, the air seal ring is easy to be subjected to thermal expansion and generates displacement, so that the assembly requirement is difficult to meet; the air seal ring with the T-shaped groove is easy to block when being slipped into and assembled, and the T-shaped groove has high processing precision, higher difficulty and relatively higher production cost.
Disclosure of Invention
The invention aims to provide a novel air seal ring which is simple in structure, convenient to process and convenient to assemble and use.
The aim of the invention is achieved by the following technical scheme:
A gas seal assembly, comprising:
The air sealing body is arranged on the stator component;
The first end face and the second end face of the air seal body are respectively provided with a first limit groove, the head end and the tail end of the stator component are respectively provided with a second limit groove, and the bottom ends of the limit pieces are inserted into the first limit groove and the second limit groove;
Screw holes are formed in the head end and the tail end of the stator component, and the locking components are screwed into the screw holes and fix the limiting component in the second limiting groove;
And an expansion gap is reserved between the bottom end of the limiting piece and the bottom surface of the first limiting groove.
As the preferable technical scheme, the limiting piece is provided with a through hole, the through hole is positioned above the screw hole, a boss is arranged at one end of the through hole, which is close to the screw hole, the locking piece part penetrates through the through hole to be screwed into the screw hole, and the part of the locking piece, which does not penetrate through the through hole, is propped against the boss.
The locking piece passes through the through hole of the limiting piece and is screwed into the screw hole in the stator component, and one end of the locking piece which is not screwed in is abutted against the boss, so that the effect of fixing the limiting piece is realized. The through hole is directly formed in the limiting piece, the processing mode is simple, the implementation is easy, and the fixing effect is good.
As an optimal technical scheme, after the locking piece is propped against the boss, the locking piece is not higher than the limiting piece. The locking piece and the limiting piece are positioned on the same horizontal plane, or the locking piece is lower than the limiting piece, so that the locking piece is prevented from protruding from the end face of the limiting piece when the fixing effect is achieved, and the later assembly is facilitated.
As the preferable technical scheme, the stator component is provided with a first groove, the limiting part is provided with a second groove, the first groove and the second groove are both positioned above the screw hole, the first groove and the second groove jointly form a through hole for the locking part to pass through, one end of the through hole, which is close to the screw hole, is provided with a boss, the locking part is partially penetrated through the through hole and screwed into the screw hole, and the part of the locking part, which does not penetrate through the through hole, is propped against the boss.
The locking piece supports with the boss of through-hole after the screw in screw, realizes the fixed effect with the locating part, and simultaneously, the first recess of stator part and the second recess of locating part constitute the through-hole jointly, and the part of locking piece non-screw in screw is held by the through-hole, still makes things convenient for the assembly of locking piece when realizing fixed effect.
As a preferable technical scheme, the thickness of the limiting piece is smaller than the depth of the first limiting groove.
The limiting piece is arranged in the first limiting groove, so that the limiting effect on the gas seal body is realized, the displacement of the gas seal body is avoided, meanwhile, the limiting piece is not contacted with the bottom surface of the first limiting groove, an expansion gap is reserved for the gas seal body, and the gas seal body can be free to expand thermally; meanwhile, the structure can adjust the thermal expansion gap according to the actual working condition, and is applicable no matter whether the temperature difference exists or not.
As the preferable technical scheme, the bottom end of the limiting piece is provided with at least two opposite sides, and the bottom end is gradually protruded towards the center of the bottom end.
As an optimal technical scheme, the stator component is provided with an air seal groove, and a part of the second limiting groove is intersected with the air seal groove.
As the preferable technical scheme, the thickness of the limiting piece is not greater than the depth of the second limiting groove, and the bottom end of the limiting piece is inserted into the second limiting groove and is in abutting contact with the second limiting groove.
As a preferable technical scheme, the locking piece is a slotted cylinder head screw.
There is also provided a gas seal ring comprising at least two gas seal assemblies as described above.
The invention has the beneficial effects that:
the limit groove is formed in the stator component and the air seal body, the limit piece is arranged in the limit groove, the air seal body is assembled on the stator component in a limited mode, and the limit piece is fixed by the locking piece, so that the air seal body is not easy to shift in later use, and the problem that the air seal body is easy to become elliptic is effectively solved;
The fixed limiting piece is not contacted with the bottom surface of the first limiting groove, and an expansion gap is reserved, so that the air seal body can be free to expand thermally; meanwhile, the structure can adjust the thermal expansion gap according to the actual working condition, and is applicable no matter whether the temperature difference exists or not;
moreover, as a thin-wall part, the air seal body is reliable and effective while achieving the effects, is simple to process, and can replace an air seal ring with a T-shaped groove structure to a certain extent.
The foregoing inventive subject matter and various further alternatives thereof may be freely combined to form a plurality of alternatives, all of which are employable and claimed herein; and the invention can be freely combined between the (non-conflicting choices) choices and between the choices and other choices. Various combinations will be apparent to those skilled in the art from a review of the present disclosure, and are not intended to be exhaustive or all of the present disclosure.
Drawings
FIG. 1 is a schematic diagram of a gas seal assembly according to a first embodiment of the present invention;
FIG. 2 is a schematic view taken along line A-A in FIG. 1 of a first embodiment of the present invention;
Fig. 3 is a schematic structural view of a second limit groove of a stator component according to a first embodiment of the present invention;
FIG. 4 is a schematic view of a limiting member according to a first embodiment of the present invention;
Wherein, 1 is stator part, 2 is the atmoseal body, 3 is the locating part, 4 is the retaining member.
Detailed Description
The inventor of the scheme finds that the processing stress is generated in the production and processing, the air seal ring is a thin-wall rotary body part, is easy to become elliptic in later use, is easy to be subjected to thermal expansion and generates displacement when the unit operates at a large temperature change, and is difficult to meet the assembly requirement; and the air seal ring with the T-shaped groove is easy to block when being slipped into and assembled, and the T-shaped groove has high processing precision, larger difficulty and relatively higher production cost.
Based on the above, the inventor researches and designs a novel air seal assembly and an air seal ring.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1:
Referring to fig. 1, 2, 3 and 4, there is shown a gas seal assembly comprising: the air seal body 2, at least two limiting pieces 3 and at least two locking pieces 4, wherein the common locking pieces 4 can be slotted cylindrical head screws.
Wherein, the air sealing body 2 is arranged on the stator component 1;
The first end face and the second end face of the air seal body 2 are respectively provided with a first limit groove, the head end and the tail end of the stator part 1 are respectively provided with a second limit groove, and the bottom end of the limit piece 3 is inserted into the first limit groove and the second limit groove;
screw holes are formed in the head end and the tail end of the stator component 1, and the locking piece 4 is screwed into the screw holes and fixes the limiting piece 3 in the second limiting groove;
an expansion gap is reserved between the bottom end of the limiting piece 3 and the bottom surface of the first limiting groove.
The limiting grooves are formed in the stator part 1 and the air seal body 2, the limiting piece 3 is arranged in the limiting grooves, and small clearance fit is adopted between the limiting piece 3 and the stator part 1 and between the limiting piece 3 and the air seal body 2, so that the air seal body 2 is assembled on the stator part 1 in a limiting way, the position movement and circumferential rotation of an air seal ring are limited, then the limiting piece 3 is fixed by the locking piece 4, the air seal body 2 is not easy to shift in later use, and the problem that the air seal body 2 is easy to become elliptic is effectively solved;
The fixed limiting piece 3 is not contacted with the bottom surface of the first limiting groove, and an expansion gap is reserved, so that the air seal body 2 can be free to expand thermally; meanwhile, the structure can adjust the thermal expansion gap according to the actual working condition, and is applicable no matter whether the temperature difference exists or not;
Moreover, as a thin-wall part, the air seal body 2 is reliable and effective while achieving the effects, is simple to process, and can replace an air seal ring with a T-shaped groove structure to a certain extent.
In some embodiments, a limiting fixing manner of the locking member 4 and the limiting member 3 and the stator member 1 is provided. Specifically, the locating part 3 has seted up the through-hole, the through-hole is located the screw top, the through-hole is close to the one end of screw is equipped with the boss, retaining member 4 part passes the through-hole screw in the screw, retaining member 4 does not pass the through-hole the part with the boss supports and holds. The retaining member 4 passes through the through hole of the limiting member 3, and then is screwed into the screw hole in the stator component 1, one end of the retaining member 4 which is not screwed in is abutted against the boss, the effect of fixing the limiting member 3 is realized, in addition, the through hole is directly formed in the limiting member 3, the processing mode is simpler, the realization is easy, and the fixing effect is good.
As a preferable technical scheme, after the locking member 4 abuts against the boss, the locking member 4 is not higher than the limiting member 3. The locking piece 4 is in a horizontal plane with the limiting piece 3, or the locking piece 4 is lower than the limiting piece 3, so that the locking piece 4 is prevented from protruding from the end face of the limiting piece 3 when the fixing effect is achieved, and the later assembly is facilitated.
In other embodiments, other limiting fixing modes of the locking piece 4, the limiting piece 3 and the stator component 1 are also provided. Specifically, the stator part 1 has seted up first recess, the second recess has been seted up on the locating part 3, first recess with the second recess all is located the screw top, just its first recess with the second recess constitutes jointly and is used for the through-hole that retaining member 4 passed, the through-hole is close to the one end of screw is equipped with the boss, retaining member 4 has a part to pass the through-hole and screw in the screw, retaining member 4 does not pass the part of through-hole with the boss supports and holds. After the locking piece 4 is screwed into the screw hole, the locking piece is abutted against the boss of the through hole, the effect of fixing the limiting piece 3 is achieved, meanwhile, the first groove of the stator component 1 and the second groove of the limiting piece 3 jointly form the through hole, the part of the locking piece 4 which is not screwed into the screw hole is accommodated by the through hole, and the locking piece 4 is convenient to assemble while the fixing effect is achieved.
In some embodiments, the thickness of the limiting member 3 is smaller than the depth of the first limiting groove. The limiting piece 3 is arranged in the first limiting groove, so that the limiting effect on the gas seal body 2 is realized, the displacement of the gas seal body 2 is avoided, meanwhile, the limiting piece 3 is not contacted with the bottom surface of the first limiting groove, an expansion gap is reserved for the gas seal body 2, and the gas seal body 2 can be free to expand thermally; meanwhile, the structure can adjust the thermal expansion gap according to the actual working condition, and is applicable no matter whether the temperature difference exists or not.
In some embodiments, the bottom end of the limiting member 3 is at least provided with two opposite sides, and gradually protrudes towards the center of the bottom end. Or the bottom end of the limiting piece 3 is inwards sunken, or the bottom end of the limiting piece 3 is a curved surface. While the limiting function of the limiting piece 3 on the air seal body 2 is not affected, an expansion gap is reserved for the air seal body 2 by reducing the volume of the bottom end.
In some embodiments, the stator component 1 is provided with an air seal groove, and the second limit groove is partially intersected with the air seal groove. It can be understood that the second limiting groove is formed at the head end and the tail end of the stator component 1, a part of the middle of the second limiting groove is overlapped with the air seal groove, and the air seal groove is widened to two sides in addition to form the second limiting groove.
As a preferable technical scheme, the thickness of the limiting piece 3 is not greater than the depth of the second limiting groove, and the bottom end of the limiting piece 3 is inserted into the second limiting groove and is in abutting contact with the second limiting groove. After the limiting piece 3 is arranged in the second limiting groove, the limiting piece 3 and the end face of the stator part 1 form a level or are lower than the end face of the stator part 1, so that the subsequent stator part 1 and the air seal body 2 can be conveniently assembled.
In summary, the limit groove is formed in the stator component 1 and the air seal body 2, the limit piece 3 is arranged in the limit groove, so that the air seal body 2 is assembled on the stator component 1 in a limited manner, and the limit piece 3 is fixed by the locking piece 4, so that the air seal body 2 is not easy to shift in later use, and the problem that the air seal body 2 is easy to become elliptic is effectively solved;
The fixed limiting piece 3 is not contacted with the bottom surface of the first limiting groove, and an expansion gap is reserved, so that the air seal body 2 can be free to expand thermally; meanwhile, the structure can adjust the thermal expansion gap according to the actual working condition, and is applicable no matter whether the temperature difference exists or not;
Moreover, as a thin-wall part, the air seal body 2 is reliable and effective while achieving the effects, is simple to process, and can replace an air seal ring with a T-shaped groove structure to a certain extent.
Example two
The embodiment provides an air seal ring, including at least two embodiments one the air seal subassembly, the common air seal ring comprises two air seal subassemblies, to the air seal ring of taking T type groove, for easy to assemble, the air seal subassembly can divide into multiple arc sections, the slip-in assembly.
The beneficial effects of the present embodiment are similar to those of the embodiment, and will not be described here again.
The foregoing basic embodiments of the invention, as well as other embodiments of the invention, can be freely combined to form numerous embodiments, all of which are contemplated and claimed. In the scheme of the invention, each selection example can be arbitrarily combined with any other basic example and selection example.
The foregoing description of the preferred embodiments of the invention 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 invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110683387.5A CN113606345B (en) | 2021-06-21 | 2021-06-21 | Air seal assembly and air seal ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110683387.5A CN113606345B (en) | 2021-06-21 | 2021-06-21 | Air seal assembly and air seal ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113606345A CN113606345A (en) | 2021-11-05 |
| CN113606345B true CN113606345B (en) | 2024-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110683387.5A Active CN113606345B (en) | 2021-06-21 | 2021-06-21 | Air seal assembly and air seal ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113606345B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3155395A (en) * | 1963-09-12 | 1964-11-03 | Gen Electric | Shaft packing assembly |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2205877A1 (en) * | 1996-06-28 | 1997-12-28 | General Electric Company | Brush seals and combined labyrinth and brush seals for rotary machines |
| US5709388A (en) * | 1996-09-27 | 1998-01-20 | General Electric Co. | Variable clearance packing ring with guide for preventing circumferential displacement |
| JP2002161711A (en) * | 2000-11-30 | 2002-06-07 | Mitsubishi Heavy Ind Ltd | Shaft seal structure |
| US6695316B2 (en) * | 2001-09-21 | 2004-02-24 | General Electric Company | Apparatus and methods for supporting a retractable packing ring |
| US7704041B2 (en) * | 2006-04-07 | 2010-04-27 | General Electric Company | Variable clearance positive pressure packing ring and carrier arrangement with coil type spring |
| US7484927B2 (en) * | 2006-04-14 | 2009-02-03 | General Electric Company | Steam turbine variable clearance packing |
| CN103644000B (en) * | 2013-12-19 | 2015-07-29 | 东方电气集团东方汽轮机有限公司 | Gland seal structure between a kind of steam turbine stator part |
| CN104314620A (en) * | 2014-10-28 | 2015-01-28 | 东方电气集团东方汽轮机有限公司 | Fixed blading structure for turbine |
| CN204783128U (en) * | 2015-03-31 | 2015-11-18 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Gas turbine is with structure of obturaging |
-
2021
- 2021-06-21 CN CN202110683387.5A patent/CN113606345B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3155395A (en) * | 1963-09-12 | 1964-11-03 | Gen Electric | Shaft packing assembly |
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| CN113606345A (en) | 2021-11-05 |
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