CN109252902A - Axial limit structure and turbogenerator - Google Patents
Axial limit structure and turbogenerator Download PDFInfo
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- CN109252902A CN109252902A CN201811075684.6A CN201811075684A CN109252902A CN 109252902 A CN109252902 A CN 109252902A CN 201811075684 A CN201811075684 A CN 201811075684A CN 109252902 A CN109252902 A CN 109252902A
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- fixed link
- arc fixed
- outer ring
- axial
- turbine
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
- F01D25/246—Fastening of diaphragms or stator-rings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The present invention relates to technical field of engines more particularly to a kind of axial limit structures.For the axial limit structure for preventing turbine outer ring axial displacement to be detached from turbine casing, which may include arc fixed link, fixed part and the annular groove set on turbine casing；Arc fixed link be set to annular groove in, and arc fixed link protrude from annular groove and with the axial side wall of turbine outer ring against；Fixed part is for fixing arc fixed link.Arc fixed link is synchronous with the thermal deformation of turbine casing and turbine outer ring, and generation temperature stress is smaller, safer；Do not allow relatively with axial limit structure in the related technology vulnerable.
Description
Technical field
The present invention relates to technical field of engines more particularly to a kind of axial limit structure and the axial limiting knot is installed
The turbogenerator of structure.
Background technique
In existing gas-turbine unit and ground combustion machine, axial limiting usually passes through spiral retaining ring or piston ring to whirlpool
It takes turns outer ring and carries out axial limiting；Or axial limiting is carried out to turbine outer ring using the part adjacent with turbine outer ring.
But there is the unstable and easy mistake of axial limiting because of the problems such as thermal stress or thermal deformation in the case of a high temperature
The problem of effect, influences engine health.
Therefore, it is necessary to study propeller for turboprop one kind new axial limit structure and be equipped with the axial limit structure
Machine.
The above- mentioned information of the background technology part invention are only used for reinforcing the understanding to background of the invention, therefore it can
To include the information not constituted to the relevant technologies known to persons of ordinary skill in the art.
Summary of the invention
It is an object of the invention to overcome the shortcomings of that the axial limiting of above-mentioned the relevant technologies is easy failure, a kind of axial direction is provided
Vulnerable axial limit structure and turbogenerator are not allowed in limit.
Additional aspect and advantage of the invention will be set forth in part in the description, and partly will be from description
It is apparent from, or can practice through the invention and acquistion.
According to an aspect of the present invention, a kind of axial limit structure is provided, for preventing turbine outer ring axial displacement de-
From turbine casing, comprising:
Set on the annular groove of the turbine casing；
Arc fixed link is set in the annular groove, and protrudes from the axis of the annular groove Yu the turbine outer ring
To side wall against；
Fixed part, for fixing the arc fixed link.
In a kind of illustrative embodiments of the invention,
The arc fixed link is fixed on the turbine outer ring or the turbine casing.
In a kind of illustrative embodiments of the invention,
The fixed part includes:
Protrusion, set on the axial side wall of the turbine outer ring；
First hook, set on one end of the arc fixed link, and hooks the protrusion；
Second hook, set on the other end of the arc fixed link, and hooks the protrusion.
In a kind of illustrative embodiments of the invention,
The protrusion is set as parallel with the annular groove arc-shaped.
In a kind of illustrative embodiments of the invention,
The protrusion includes two spaced boss.
In a kind of illustrative embodiments of the invention,
Blind hole is provided on the turbine casing, the fixed part includes:
First bending bar set on one end of the arc fixed link, and protrudes into the blind hole；
Second bending bar set on the other end of the arc fixed link, and protrudes into the blind hole.
In a kind of illustrative embodiments of the invention,
The material of the arc fixed link is identical as the material of the turbine outer ring.
In a kind of illustrative embodiments of the invention,
The arc fixed link is set as multiple, and the fixed part is set as multiple.
In a kind of illustrative embodiments of the invention,
The axial cross section of the arc fixed link is one of circle, rectangle, trapezoidal；Correspondingly, the annular is recessed
The axial cross section of slot is one of circle, rectangle, trapezoidal.
According to an aspect of the present invention, a kind of turbogenerator is provided, comprising:
Axial limit structure described in above-mentioned any one.
As shown from the above technical solution, the present invention has at least one of following advantages and good effect:
Axial limit structure and turbogenerator of the present invention, arc fixed link protrude from the axis of annular groove and turbine outer ring
To side wall against it is axial to reach limitation to block the axial side wall of turbine outer ring using the part that arc fixed link protrudes from groove
The purpose of displacement.By the fixed arc fixed link of fixed part, so that arc fixed link will not deviate from out of groove, to turbine outer ring
Limit is reliable；Because arc fixed link is mounted in the thermal deformation between turbine casing and turbine outer ring, with turbine casing and turbine outer ring
Synchronous, generation temperature stress is smaller, safer.Meanwhile arc fixed link is originally just without elasticity, is not in the relevant technologies
In the phenomenon that failure due to plastic deformation, it is opposite do not allow with axial limit structure in the related technology it is vulnerable.
Detailed description of the invention
Its example embodiment is described in detail by referring to accompanying drawing, above and other feature of the invention and advantage will become
It is more obvious.
Fig. 1 is the structural schematic diagram for carrying out axial limiting to turbine outer ring using spiral retaining ring or piston ring；
Fig. 2 is the structural schematic diagram for carrying out axial limiting to turbine outer ring using the part adjacent with turbine outer ring；
Fig. 3 is the diagrammatic cross-section of axial limit structure of the present invention；
Fig. 4 is the enlarged diagram of part A in Fig. 3；
Fig. 5 is the schematic diagram of the arc fixed link of axial limit structure of the present invention；
Fig. 6 is the side structure schematic view of turbine outer ring.
The reference numerals are as follows for main element in figure:
1, turbine casing；101, first baffle；102, first annular bending plate；103, second baffle；104, the second annular
Bending plate；105, first annular blocking version；106, the second annular stops version；107, limiting slot；2, turbine outer ring；3, work leaf
Piece；4, spiral retaining ring or piston ring；5, adjacent parts；6, annular groove；7, arc fixed link；8, boss.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical attached drawing in figure
Label indicates same or similar structure, thus the detailed description that will omit them.
The structural schematic diagram for carrying out axial limiting shown in referring to Fig.1 to turbine outer ring using spiral retaining ring or piston ring, in phase
In the technology of pass, working-blade 3 is continued working, and turbine temperature level is higher and higher, in order to improve efficiency reduction thermal stress, turbine
Outer ring generallys use segment design；The radial positioning of turbine outer ring 2 passes through hook and the cooperation guarantee of turbine casing 1, axial limiting
It generallys use spiral retaining ring or piston ring 4 to carry out axial limiting to turbine outer ring 2；It is used and turbine outer ring phase referring to shown in Fig. 2
Adjacent part carries out the structural schematic diagram of axial limiting to turbine outer ring, using the part adjacent with turbine outer ring 2 to turbine outside
Ring 2 carries out axial limiting.
Spiral retaining ring is easily deformed in the case of a high temperature, and piston ring is easy plastic deformation elastic force decline, easily causes spiral retaining ring
Or piston ring is detached from turbine casing 1, to lose the axial limiting to turbine outer ring 2, turbine outer ring 2 is made to be detached from turbine casing 1, shadow
Engine health is rung, and large-sized spiral retaining ring and piston ring cost are high.Another example embodiment uses outside turbine
When 2 adjacent parts 5 of ring carry out axial limiting to turbine outer ring 2, due to mismachining tolerance and the unmatched influence of thermal deformation, limit
Gap between part and turbine outer ring 2 is difficult to meet requirement, when gap is less than normal, hot lower part expanded by heating can
Gap shrinks can be made to zero, and then part of damage；When gap is bigger than normal, turbine outer ring 2 may be made to be detached from turbine under hot
Casket 1, influences engine health.
Present invention firstly provides a kind of axial limit structure, the axial limit structure is for preventing turbine outer ring 2 axial
Displacement is detached from turbine casing 1, and referring to the diagrammatic cross-section of axial limit structure of the present invention shown in Fig. 3, which can
To include annular groove 6, fixed part and arc fixed link 7 set on turbine casing 1；It is recessed that arc fixed link 7 protrudes from annular
Slot 6 and with the axial side wall of turbine outer ring 2 against；Fixed part is for fixing arc fixed link 7.
Arc fixed link protrudes from the axial side wall of annular groove and turbine outer ring against protruding from using arc fixed link
The axial side wall of turbine outer ring is blocked to achieve the purpose that limit axial displacement in the part of groove.It is solid by the fixed arc of fixed part
Fixed pole limits turbine outer ring reliable so that arc fixed link will not deviate from out of groove；Because arc fixed link is mounted in turbine
Synchronous with the thermal deformation of turbine outer ring with turbine casing between casket and turbine outer ring, generation temperature stress is smaller, safer.
Meanwhile arc fixed link is originally just without elasticity, is not in phase in the related technology the phenomenon that failure due to plastic deformation
It is vulnerable to not allowing with axial limit structure in the related technology；The material that arc fixed link can use price relatively low,
Compared to the relevant technologies, it is possible to reduce a large amount of manufacturing cost.
It is when the engine is working, general to be cooperated using multistage turbine outer ring 2 to complete work referring to shown in Fig. 3 and Fig. 6,
Multistage turbine outer ring 2 fits closely.
As described below mainly make to the wherein axial limiting of one section of turbine outer ring 2 is specifically described,
The axial side wall of turbine outer ring is blocked using the part that arc fixed link protrudes from groove to reach and limit axial position
The purpose of shifting.Turbine outer ring is limited so that arc fixed link will not deviate from out of groove by the fixed arc fixed link of fixed part
Position is reliable；It is same with the thermal deformation of turbine casing and turbine outer ring because arc fixed link is mounted between turbine casing and turbine outer ring
It is smaller to generate temperature stress, or even does not generate temperature stress for step, safer.Meanwhile arc fixed link does not just have bullet originally
Property, be not in the related technology the phenomenon that failure due to plastic deformation, it is opposite with axial limiting knot in the related technology
Structure is not allowed vulnerable.
In this example embodiment, annular groove 6 is set on turbine casing 1；The cross sectional shape of annular groove can be
Semicircle, rectangle or other shapes.
In this example embodiment, referring to shown in Fig. 3 and Fig. 5, fixed part may include the axial direction set on turbine outer ring 2
The protrusion of side wall；The second hook with the other end for being set to arc fixed link 7 is linked up with set on one end of arc fixed link 7 first,
First hook hooks protrusion with the second hook respectively.
Protrusion can be parallel with annular groove 6 arc-shaped, be fitted using the protrusion and 7 phase of arc fixed link of this structure chart
Fixed fastness is influenced with gap will not be generated.Protrusion can be two spaced boss 8, i.e. two boss are one
Group protrusion.First hook at 7 both ends of arc fixed link hooks two boss 8, fixing-stable with the second hook respectively.
Protrusion can be multiple groups, and the number of corresponding boss 8 is also possible to multiple；Arc fixed link 7, which can use, divides
Segment structure, the first hook that every section of arc fixed link 7 is equipped with hook boss 8 with the second hook respectively.Arc is consolidated by protruding
Fixed pole 7 securely fixes, and arc fixed link 7 is not easily to fall off.
Arc fixed link can use segmental structure, when using segmental structure, if wherein one section of arc fixed link 7 occurs
Problem, the arc fixed link 7 of other sections still can be very good the axial displacement of limitation turbine outer ring 2, more securely and reliably, greatly
Amplitude strengthens the stability to 2 axial limiting of turbine outer ring.Certainly, protrusion number is also possible to one group, opposite boss 8
Number is two；Arc fixed link 7 uses overall structure, passes through groove, the first hook and the second hook by an arc fixed link 7
Boss 8 is hooked respectively arc fixed link 7 is fixed, convenient for disassembly and assembly when arc fixed link 7 is using overall structure, when manufacture is simply square
Just.
In this example embodiment, fixed part can also be is equipped with blind hole on turbine casing 1, is set to arc fixed link
The first bending bar of 7 one end protrudes into blind hole；The second bending bar set on the other end of arc fixed link 7 also protrudes into blind hole
It is interior.
Here it describes in detail to above structure, blind hole, arc fixed link is equipped in the groove set by turbine casing 1
7 the first bending bar and the second bending bar are respectively protruding into two blind holes, and blind hole is not that vertical structure is set up with annular groove 6,
Slope surface presence is had, the first bending bar and the second bending bar and blind hole inner wall in arc fixed link 7 generate friction, rely on
Frictional force and fragmentation make arc fixed link 7 not fall out annular groove 6 holding power of arc fixed link 7 to realize to arc
The fixation of fixed link 7；Blind hole herein can be two, and arc fixed link 7 uses overall structure, and the quantity of blind hole can also be more
In two, arc fixed link 7 can use segmentation structure, the first bending bar and the second bending bar of every section of arc fixed link 7
It is inserted into blind hole respectively and every section of arc fixed link 7 is fixed, i.e., multiple arcs fixed link 7 is fixed respectively.It adopts
When with segmental structure, if wherein one section of arc fixed link 7 goes wrong, there are also other same structure can to turbine outer ring 2 into
Row axial limiting can increase the security reliability of the structure.
Above-mentioned bending bar can be there are many wrap direction, and the bending bar at 7 both ends of arc fixed link can be to close to arc
The direction bending of arc where bending bar；The bending bar at arc fold bending bar both ends can be to the side far from arc where arc fold bending bar
To bending；Can also be with one end to the direction bending close to arc where arc fold bending bar, the other end is to far from where arc fold bending bar
The direction bending of arc, the blind hole in annular groove 6 should be adapted with bending bar certainly.
In this example embodiment, when using segmental structure, fixed part can be blind hole and be used in mixed way with protrusion；Example
Such as, arc fixed link 7 is divided is four sections, and first segment and third section hook protrusion using the hook of arc fixed link 7 and fix portion,
Second segment and the 4th section are using 7 bending bar of arc fixed link insertion blind hole as fixed part, and every section of positional relationship can be with herein
It exchanges, as first segment and second segment can swap.
It should be noted that there are many modes for the structure of fixed arc fixed link, two kinds are listed herein, also there are many real
Existing mode, for example, 7 both ends of arc fixed link are equipped with button hole, the protrusion being equipped in 1 axial side wall of turbine casing buckles into button hole
Arc fixed link 7 is fixed, arc fixed link 7 herein can also use segmental structure certainly.As long as can reach arc
Fixed link is fixed, is not specifically limited in the present embodiment.In this example embodiment, arc fixed link 7 can be with
It is steel wire, because steel wire is mounted between turbine casing 1 and turbine outer ring 2, the basic phase of thermal expansion coefficient of steel wire and turbine outer ring 2
Together, it is smaller to generate temperature stress, can be neglected, compared with prior art, steel wire low cost is easy to obtain, and can save big
Cost is measured, and can be more stable safe with the progress axial limiting of turbine outer ring 2.In another embodiment, arc is fixed
The material of bar 7 can also use the preferable material of ductility, such as metal material, metal and the mixture of carbon etc., in this example
It is not specifically limited in embodiment；Material acquisition is easy, production is simple, is needed process costs lower and is securely and reliably not easy
Failure.
In this example embodiment, referring to shown in Fig. 3 and Fig. 4, the axial cross section of arc fixed link 7 be can be as circle
Shape；The section of corresponding annular groove 6 can be circle.When the section of arc fixed link 7 and annular groove 6 is circle
The radius of the axial cross section of arc fixed link 7 is only needed to be slightly less than the radius of the axial cross section of groove.In another embodiment party
In formula, the axial cross section of arc fixed link can also be with rectangle, trapezoidal or oval.The axial direction of annular groove 6 on the other side
Section is also possible to for rectangle, trapezoidal or oval.
The above axial limiting mainly to turbine outer ring 2 to the left is discussed in detail, referring to shown in Fig. 2, axis to the right
It may include hereinafter, turbine casing 1 stretches out two ring baffles, first baffle to 2 direction of turbine outer ring to position limiting structure
101 with second baffle 103.Angle between ring baffle and turbine casing 1 can be right angle；Annular bending is equipped on baffle
Plate, the annular bending plate on first baffle 101 are first annular bending plate 102, and the annular bending plate on second baffle 102 is the
Second ring bending plate 104.Baffle and bending plate, which are constituted, to be collectively formed and be open to the left with 1 outer wall of turbine casing with L-type structure
Limiting slot 107.Be respectively equipped on the right side of two axial side walls of turbine outer ring 2 annular stop version, it is first annular stop 105 editions with
Second annular stops version 106.Make two annulars that version be stopped to be respectively clamped into two limiting slots 107 to complete the right side to turbine outer ring 2
Side axial limiting.
It should be noted that can also be with to carrying out axial limiting on the left of turbine outer ring 2 to being limited on the right side of turbine outer ring 2
Position limiting structure is limited, as long as there is side to use with as long as to carrying out the position limiting structure of axial limiting on the left of turbine outer ring 2
It should be understood as in protection scope.
It should be noted that described above is that only one section of turbine outer ring 2 is described in detail.Related technical personnel can
With understanding, in multistage turbine outer ring it is any one or more snippets can be using above-mentioned position limiting structure come to turbine outer ring
Carry out axial limiting.
Certainly, the axial limiting mode of multistage turbine outer ring 2 can be different, as long as there is wherein one or more snippets any use
Axial limit structure described above, should all be understood as falling within protection scope.
Further, the present invention also provides a kind of turbogenerator, which includes axial direction described above
Position limiting structure.The specific structure of axial limit structure is above-mentioned to have been carried out detailed description, and therefore, details are not described herein again.
Above-mentioned described feature, structure or characteristic can be incorporated in one or more embodiment party in any suitable manner
In formula, if possible, it is characterized in discussed in each embodiment interchangeable.In the above description, it provides many specific thin
Section fully understands embodiments of the present invention to provide.It will be appreciated, however, by one skilled in the art that this can be practiced
The technical solution of invention, or can be using other methods, component, material without one or more in the specific detail
Material etc..In other cases, known features, material or operation are not shown in detail or describe to avoid each side of the invention is obscured
Face.
Although the term of relativity, such as "upper" "lower" is used to describe a component of icon for another in this specification
The relativeness of one component, but these terms are in this manual merely for convenient, for example, with reference to the accompanying drawings described in show
The direction of example.It is appreciated that, if making it turn upside down the device overturning of icon, the component described in "upper" will
As the component in "lower".Term of other relativities, such as "high" " low " "top" "bottom" " preceding " " rear " " left side " " right side " etc. are also made
With similar meaning.When certain structure is at other structures "upper", it is possible to refer to that certain structural integrity is formed in other structures, or
Refer to that certain structure is " direct " to be arranged in other structures, or refers to that certain structure is arranged in other structures by the way that another structure is " indirect ".
In this specification, term "one", " one ", "the", " described " and "at least one" indicating there are one or
Multiple element/component parts/etc.；Term "comprising", " comprising " and " having " are to indicate the open meaning being included
And refer to the element in addition to listing/component part/also may be present other than waiting other element/component part/etc.；Term " the
One ", " second " and " third " etc. only use as label, are not the quantity limitations to its object.
It should be appreciated that the present invention is not limited in its application to the detailed construction and arrangement of the component of this specification proposition
Mode.The present invention can have other embodiments, and can realize and execute in many ways.Aforesaid deformation form and
Modification is fallen within the scope of the present invention.It should be appreciated that this specification invention and the present invention limited extend in text
And/or it is mentioned in attached drawing or all alternative combinations of two or more apparent independent features.It is all these different
Combination constitutes multiple alternative aspects of the invention.Embodiment described in this specification illustrates to become known for realizing the present invention
Best mode, and will enable those skilled in the art using the present invention.
Claims (10)
1. a kind of axial limit structure, for preventing turbine outer ring axial displacement to be detached from turbine casing characterized by comprising
Annular groove is set to the turbine casing；
Arc fixed link is set in the annular groove, and protrudes from the axial side of the annular groove Yu the turbine outer ring
Wall against；
Fixed part, for fixing the arc fixed link.
2. axial limit structure according to claim 1, which is characterized in that
The arc fixed link is fixed on the turbine outer ring or the turbine casing.
3. axial limit structure according to claim 1, which is characterized in that
The fixed part includes:
Protrusion, set on the axial side wall of the turbine outer ring；
First hook, set on one end of the arc fixed link, and hooks the protrusion；
Second hook, set on the other end of the arc fixed link, and hooks the protrusion.
4. axial limit structure according to claim 3, which is characterized in that
The protrusion is set as parallel with the annular groove arc-shaped.
5. axial limit structure according to claim 3, which is characterized in that
The protrusion includes two spaced boss.
6. axial limit structure according to claim 1, which is characterized in that
Blind hole is provided on the turbine casing, the fixed part includes:
First bending bar set on one end of the arc fixed link, and protrudes into the blind hole；
Second bending bar set on the other end of the arc fixed link, and protrudes into the blind hole.
7. axial limit structure according to claim 1, which is characterized in that
The material of the arc fixed link is identical as the material of the turbine outer ring.
8. axial limit structure according to claim 1, which is characterized in that
The arc fixed link is set as multiple, and the fixed part is set as multiple.
9. axial limit structure according to claim 1, which is characterized in that
The axial cross section of the arc fixed link is one of circle, rectangle, trapezoidal；Correspondingly, the annular groove
Axial cross section is one of circle, rectangle, trapezoidal.
10. a kind of turbogenerator characterized by comprising
Axial limit structure according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811075684.6A CN109252902B (en) | 2018-09-14 | 2018-09-14 | Axial limiting structure and turbine engine |
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| CN201811075684.6A CN109252902B (en) | 2018-09-14 | 2018-09-14 | Axial limiting structure and turbine engine |
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| CN109252902B CN109252902B (en) | 2021-09-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109751088A (en) * | 2019-03-25 | 2019-05-14 | 中国船舶重工集团公司第七0三研究所 | A kind of connecting structure of block-type turbine outer ring for marine gas turbine |
| CN111042878A (en) * | 2019-12-30 | 2020-04-21 | 中国科学院工程热物理研究所 | Auxiliary force transmission casing structure of gas turbine |
| CN113062780A (en) * | 2021-05-06 | 2021-07-02 | 中国航发湖南动力机械研究所 | Turbine outer ring axial limit structure |
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