CN111456816B - Stator blade anti-drop mounting structure - Google Patents

Stator blade anti-drop mounting structure Download PDF

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Publication number
CN111456816B
CN111456816B CN202010274194.XA CN202010274194A CN111456816B CN 111456816 B CN111456816 B CN 111456816B CN 202010274194 A CN202010274194 A CN 202010274194A CN 111456816 B CN111456816 B CN 111456816B
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China
Prior art keywords
stage
stator
annular
stator casing
spigot
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CN202010274194.XA
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Chinese (zh)
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CN111456816A (en
Inventor
张岩
蒋琇琇
王�华
印雪梅
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AECC Shenyang Engine Research Institute
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AECC Shenyang Engine Research Institute
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Priority to CN202010274194.XA priority Critical patent/CN111456816B/en
Publication of CN111456816A publication Critical patent/CN111456816A/en
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Publication of CN111456816B publication Critical patent/CN111456816B/en
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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
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/542—Bladed diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The application concretely relates to stator blade anti-drop mounting structure includes: the front-stage stator casing is of a whole ring structure, a plurality of front-stage rotor blades are arranged in the front-stage stator casing along the circumferential direction, an annular flange and an annular bulge opposite to the annular flange are arranged on the inner side of the rear end of the front-stage stator casing, a front-stage annular stop groove is formed in the surface of the annular bulge opposite to the annular flange, and a notch is formed in the annular flange; a plurality of stator vanes, each stator vane having a front spigot protrusion thereon and a back spigot protrusion opposite the front spigot protrusion; the front spigot protrusion of each stator blade sequentially penetrates through the notch to be clamped into the annular groove of the preceding stage and rotates to the mounting position along the circumferential direction; the rear-stage stator casing is of an integral ring structure, a plurality of rear-stage rotor blades are arranged in the rear-stage stator casing along the circumferential direction, the front end of the rear-stage rotor blades is butted with the rear end of the front-stage stator casing, an annular bulge is arranged on the inner side of the front end of the rear-stage rotor blades, and a rear-stage annular groove is formed in the surface, facing the front-stage stator casing, of the annular bulge; the back rabbet of each stator blade is clamped into the back-stage annular groove in a protruding mode.

Description

Stator blade anti-drop mounting structure
Technical Field
The application belongs to the technical field of stator casing assembly design, and particularly relates to a stator blade anti-drop mounting structure.
Background
The aero-engine compressor has high working pressure and high sensitivity to leakage, and in order to avoid the leakage of the compressor and ensure the working efficiency of the compressor, each stage of stator casing of the compressor is designed to be of an integral ring structure.
When the stator casings of all levels are of an integral ring structure, the assembly is mostly finished in a mode of sleeving from the back to the front, and the specific process comprises the steps of firstly finishing the assembly of a front-stage stator casing and a front-stage rotor blade, then clamping the front rabbets of a plurality of stator blades of the corresponding levels into front-stage rabbet grooves in the back end of the front-stage stator casing, then finishing the assembly of a back-stage stator casing and a back-stage rotor blade, then butting the front end of the back-stage stator casing with the back end of the front-stage stator casing, simultaneously clamping the back rabbets of the stator blades into back-stage rabbet grooves in the front end of the back-stage stator casing in an integral alignment manner, finishing the assembly of the front-stage stator casing and the back-stage stator casing, based on the existing front-stage stator casing and back-stage stator casing structure, in the process of clamping the front end of the back-stage stator casing with the back end of the front-stage stator casing, only the front rabbets of each stator blade are clamped into the front-stage stator casing, the stator blade is easy to be pulled out from the front-stage stopping slot of the front-stage stator casing to be integrally clamped into the rear-stage stopping slot in the front end of the rear-stage stator casing due to the lack of necessary constraint, the rear stopping slot of each stator blade is difficult to be aligned and integrally clamped into the rear-stage stopping slot in the front end of the rear-stage stator casing, the stator blade pulled out from the front-stage stopping slot of the front-stage stator casing is easy to collide with the front-stage rotor blade and the rear-stage rotor blade to damage the front-stage rotor blade and the rear-stage rotor blade, and the stator blade is easy to be pulled out from the front-stage stopping slot of the front-stage stator casing to collide with the front-stage rotor blade and the rear-stage rotor blade to damage the front-stage rotor blade and the rear-stage rotor blade in the process of disassembling the rear-stage stator casing and the front-stage stator casing.
The present application has been made in view of the above-mentioned technical drawbacks.
It should be noted that the above background disclosure is only used for assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and the above background disclosure should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is already disclosed at the filing date of the present patent application.
Disclosure of Invention
It is an object of the present application to provide a stator blade drop-off prevention mounting structure to overcome or alleviate at least one aspect of the technical disadvantages known to exist.
The technical scheme of the application is as follows:
a stator blade drop-preventing mounting structure comprising:
the forestage stator casing is of a whole ring structure, a plurality of forestage rotor blades are arranged in the forestage stator casing along the circumferential direction, the inner side of the rear end of the forestage stator casing is provided with an annular flange and an annular bulge opposite to the annular flange, the surface of the annular bulge opposite to the annular flange is provided with a forestage annular spigot groove, and the annular flange is provided with a notch;
a plurality of stator vanes, each stator vane having a front spigot protrusion and a rear spigot protrusion opposite the front spigot protrusion; the front spigot protrusion of each stator blade sequentially penetrates through the notch to be clamped into the annular spigot groove of the preceding stage and rotates to the mounting position along the circumferential direction;
the rear-stage stator casing is of an integral ring structure, a plurality of rear-stage rotor blades are arranged in the rear-stage stator casing along the circumferential direction, the front end of the rear-stage rotor blades is butted with the rear end of the front-stage stator casing, an annular bulge is arranged on the inner side of the front end of the rear-stage rotor blades, and a rear-stage annular stop groove is formed in the surface, facing the front-stage stator casing, of the annular bulge; the back spigot of each stator blade is clamped into the back stage annular spigot groove in a protruding mode.
According to at least one embodiment of the present application, further comprising:
and the notch blocking structure is arranged at the notch and used for blocking at least part of the notch so as to prevent the front spigot of each stator blade from protruding out of the notch.
According to at least one embodiment of the present application, the annular flange has an annular groove thereon;
breach block structure includes:
and the retainer ring is clamped in the annular clamping groove.
According to at least one embodiment of the application, the annular flange protrudes out of the rear end of the stator casing of the front stage, and the outer side surface of the annular flange is sunken to form an annular clamping groove.
According to at least one embodiment of the present application, the collar has an opening therein.
According to at least one embodiment of the application, the opening is offset from the notch.
According to at least one embodiment of the application, a notched blocking structure comprises:
and the barrier strip is connected with the annular flange and covers the notch.
According to at least one embodiment of the present application, the annular flange has two stop grooves thereon;
the two ends of the barrier strip are provided with stop blocks, and each stop block is correspondingly inserted into one stop groove.
According to at least one embodiment of the application, the front-stage stator casing is provided with a front-stage connecting edge outside the rear end;
the outer side of the front end of the rear-stage stator casing is provided with a rear-stage connecting edge, and the rear-stage connecting edge is connected with the front-stage connecting edge through a bolt.
Drawings
Fig. 1 is a schematic view of a stator blade anti-drop mounting structure provided in an embodiment of the present application;
FIG. 2 is a partial schematic view of FIG. 1;
FIG. 3 is a schematic view of a retainer ring provided in an embodiment of the present application;
fig. 4 is a partial schematic view of a stator blade drop-prevention mounting structure provided in another embodiment of the present application;
FIG. 5 is a schematic view of a barrier provided by an embodiment of the present application;
wherein:
1-a preceding stage stator casing; 2-preceding stage rotor blades; 3-an annular flange; 4-stator blades; 5, protruding the front spigot; 6-the back spigot is protruded; 7-a rear-stage stator casing; 8-a rear stage rotor blade; 9-a retainer ring; 10-barrier strip; 11-stop groove.
Detailed Description
In order to make the technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail with reference to the accompanying drawings, and it should be understood that the specific embodiments described herein are only some of the embodiments of the present application, and are used for explaining the present application and not limiting the present application. It should be noted that, for convenience of description, only the parts related to the present application are shown in the drawings, other related parts may refer to general designs, and the embodiments and technical features in the embodiments in the present application may be combined with each other to obtain a new embodiment without conflict.
In addition, unless otherwise defined, technical or scientific terms used in the description of the present application shall have the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", and the like used in the description of the present application, which indicate orientations, are used only to indicate relative directions or positional relationships, and do not imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed accordingly, and thus, should not be construed as limiting the present application. The use of "first," "second," "third," and the like in the description of the present application is for descriptive purposes only to distinguish between different components and is not to be construed as indicating or implying relative importance. The use of the terms "a," "an," or "the" and similar referents in the description of the application should not be construed as an absolute limitation of quantity, but rather as the presence of at least one. The use of the terms "comprising" or "including" and the like in the description of the present application is intended to indicate that the element or item preceding the term covers the element or item listed after the term and its equivalents, without excluding other elements or items.
Further, it is noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are used in the description of the invention in a generic sense, e.g., connected as either a fixed connection or a removable connection or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected through the inside of two elements, and those skilled in the art can understand their specific meaning in this application according to the specific situation.
The present application is described in further detail below with reference to fig. 1 to 5.
A stator blade drop-preventing mounting structure comprising:
the stator casing 1 of the preceding stage, it is the whole ring structure, there are multiple preceding stage rotor blades 2 along the circumference in it, its back end inboard has annular flange 3, annular projection opposite to annular flange 3, the annular projection has annular stop slot of the preceding stage on the face opposite to annular flange 3, have the gap on the annular flange 3;
a plurality of stator vanes 4, each stator vane 4 having a front spigot protrusion 5 and a rear spigot protrusion 6 opposite the front spigot protrusion 5; the front spigot bulge 5 of each stator blade 4 sequentially penetrates through the notch to be clamped into the front-stage annular spigot groove and rotates to the mounting position along the circumferential direction;
the rear-stage stator casing 7 is of a whole-ring structure, a plurality of rear-stage rotor blades 8 are arranged in the rear-stage stator casing along the circumferential direction, the front end of each rear-stage rotor blade is in butt joint with the rear end of the front-stage stator casing 1, an annular bulge is arranged on the inner side of the front end of each rear-stage rotor blade, and a rear-stage annular stop groove is formed in the surface, facing the front-stage stator casing 1, of the annular bulge; the rear spigot protrusion 6 of each stator blade 4 is snapped into the rear stage annular spigot groove.
For the anti-drop mounting structure for the stator blades disclosed in the above embodiment, as can be understood by those skilled in the art, the annular flange 3 is arranged on the front-stage stator casing 1, and the annular flange 3 has a constraint effect on the front spigot protrusion 5 of each stator blade 4 clamped in the front-stage annular spigot groove, so that the front spigot protrusion 5 of each stator blade 4 is not easily dropped from the front-stage annular spigot groove, thereby maintaining the stability of each stator blade 4, and making each stator blade 4 not easily drop in the butt joint or decomposition process of the front-stage stator casing 1 and the rear-stage stator casing 7, thereby effectively avoiding damage to the front-stage rotor blade 2 and the rear-stage rotor blade 8, and making the rear spigot protrusion of each stator blade 4 easily aligned and integrally clamped in or dropped out the rear-stage annular spigot groove of the rear-stage stator casing 7.
In some optional embodiments, further comprising:
and the notch blocking structure is arranged at the notch and used for blocking at least part of the notch so as to prevent the front spigot of each stator blade 4 from protruding out of the notch.
In some alternative embodiments, the annular flange 3 has an annular groove thereon;
breach block structure includes:
the retaining ring 9 is clamped into the annular clamping groove to plug the notch on the annular flange 3, so that the front spigot of each stator blade 4 is effectively prevented from protruding from the notch.
In some alternative embodiments, the annular flange 3 protrudes from the rear end of the stator casing 1 of the front stage, and the outer side surface thereof is recessed to form an annular clamping groove.
In some alternative embodiments, the retainer ring 9 has an opening therein to enable the retainer ring 9 to be easily snapped into the annular groove.
In alternative embodiments, the opening is smaller than the dimension of the tang protrusion 5 on each stator vane 4 to prevent the tang protrusion 5 on each stator vane 4 from coming out of it.
In some alternative embodiments, the openings are offset from the notches, so that a solid portion of the retainer ring 9 can effectively block the notches in the annular flange 3, thereby effectively preventing the front spigot of each stator blade 4 from protruding out of the notches.
In some alternative embodiments, the notched closure structure comprises:
and the barrier strip 10 is connected with the annular flange 3 and covers the notch, so that the front spigot of each stator blade 4 is effectively prevented from protruding out of the notch.
In some alternative embodiments, the bars 10 are curved to fit the shape of the annular flange 3.
In some alternative embodiments, the annular flange 3 has two stop grooves 11;
both ends of the barrier strip 10 have stop blocks each inserted into one of the stop grooves 11.
In some optional embodiments, the front-stage stator casing 1 has a front-stage connecting edge outside the rear end;
the outer side of the front end of the rear-stage stator casing 7 is provided with a rear-stage connecting edge, and the rear-stage connecting edge is connected with the front-stage connecting edge through a bolt.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Having thus described the present application in connection with the preferred embodiments illustrated in the accompanying drawings, it will be understood by those skilled in the art that the scope of the present application is not limited to those specific embodiments, and that equivalent modifications or substitutions of related technical features may be made by those skilled in the art without departing from the principle of the present application, and those modifications or substitutions will fall within the scope of the present application.

Claims (9)

1. The utility model provides a stator blade anti-drop mounting structure which characterized in that includes:
the stator casing (1) of the preceding stage is of a whole ring structure, a plurality of rotor blades (2) of the preceding stage are arranged in the stator casing along the circumferential direction, an annular flange (3) and an annular bulge opposite to the annular flange (3) are arranged on the inner side of the rear end of the stator casing, a preceding stage annular stop groove is formed in the surface of the annular bulge opposite to the annular flange (3), and a notch is formed in the annular flange (3);
a plurality of stator vanes (4), each stator vane (4) having a front spigot protrusion (5) thereon and a rear spigot protrusion (6) opposite the front spigot protrusion (5); front spigot bulges (5) of the stator blades (4) sequentially penetrate through the notches to be clamped into the front-stage annular spigot groove and rotate to the mounting position along the circumferential direction;
the rear-stage stator casing (7) is of a whole-ring structure, a plurality of rear-stage rotor blades (8) are arranged in the rear-stage stator casing along the circumferential direction, the front end of the rear-stage rotor blades is in butt joint with the rear end of the front-stage stator casing (1), an annular bulge is arranged on the inner side of the front end of the rear-stage rotor blades, and a rear-stage annular spigot groove is formed in the surface, facing the front-stage stator casing (1), of the annular bulge; the rear spigot protrusion (6) of each stator blade (4) is clamped into the rear-stage annular spigot groove.
2. The stator blade drop-preventing mounting structure according to claim 1,
further comprising:
the gap blocking structure is arranged at the gap and used for blocking at least part of the gap so as to prevent the front spigot of each stator blade (4) from protruding out of the gap.
3. The stator blade drop-preventing mounting structure according to claim 2,
the annular flange (3) is provided with an annular clamping groove;
the breach block structure includes:
and the retainer ring (9) is clamped in the annular clamping groove.
4. The stator blade drop-preventing mounting structure according to claim 3,
the annular flange (3) protrudes out of the rear end of the preceding stage stator casing (1), and the outer side surface of the annular flange is sunken to form the annular clamping groove.
5. The stator blade drop-preventing mounting structure according to claim 3,
the retainer ring (9) is provided with an opening.
6. The stator blade drop-preventing mounting structure of claim 5,
the opening is staggered with the notch.
7. The stator blade drop-preventing mounting structure according to claim 2,
the breach block structure includes:
and the barrier strip (10) is connected with the annular flange (3) and covers the notch.
8. The stator blade fall-off prevention mounting structure according to claim 7,
the annular flange (3) is provided with two stop grooves (11);
the two ends of the barrier strip (10) are respectively provided with a stop block, and each stop block is correspondingly inserted into one stop groove (11).
9. The stator blade drop-preventing mounting structure according to claim 1,
the outer side of the rear end of the preceding-stage stator casing (1) is provided with a preceding-stage connecting edge;
the outer side of the front end of the rear-stage stator casing (7) is provided with a rear-stage connecting edge, and the rear-stage connecting edge is connected with the front-stage connecting edge through a bolt.
CN202010274194.XA 2020-04-09 2020-04-09 Stator blade anti-drop mounting structure Active CN111456816B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010274194.XA CN111456816B (en) 2020-04-09 2020-04-09 Stator blade anti-drop mounting structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010274194.XA CN111456816B (en) 2020-04-09 2020-04-09 Stator blade anti-drop mounting structure

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CN111456816B true CN111456816B (en) 2022-08-30

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114263632A (en) * 2021-10-22 2022-04-01 中国航发沈阳发动机研究所 Rotor component of engine fan
CN113847105B (en) * 2021-10-26 2024-06-11 中国航发沈阳发动机研究所 Stator part assembly structure of odd-number adjustable stator blade of engine and method thereof

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Publication number Priority date Publication date Assignee Title
JPH06129205A (en) * 1992-10-20 1994-05-10 Mitsubishi Heavy Ind Ltd Gas turbine stator vane
CN106799569B (en) * 2017-01-19 2019-08-23 中国航发沈阳发动机研究所 A kind of combinational processing method of the stator blade on band sector installation side
CN110030111B (en) * 2019-04-04 2022-02-18 中国航发沈阳发动机研究所 Variable cycle engine core machine driving fan level structure

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