CN117380431A - Spraying protection clamp and spraying method for front baffle of low-pressure turbine - Google Patents
Spraying protection clamp and spraying method for front baffle of low-pressure turbine Download PDFInfo
- Publication number
- CN117380431A CN117380431A CN202311582547.2A CN202311582547A CN117380431A CN 117380431 A CN117380431 A CN 117380431A CN 202311582547 A CN202311582547 A CN 202311582547A CN 117380431 A CN117380431 A CN 117380431A
- Authority
- CN
- China
- Prior art keywords
- spraying
- pressure turbine
- protective cover
- front baffle
- base
- 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.)
- Pending
Links
- 238000005507 spraying Methods 0.000 title claims abstract description 69
- 230000001681 protective effect Effects 0.000 claims abstract description 46
- 239000007921 spray Substances 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 abstract description 12
- 238000000576 coating method Methods 0.000 abstract description 12
- 238000010586 diagram Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- PHTHEUNUXVDUOD-UHFFFAOYSA-N aluminum oxygen(2-) titanium(4+) Chemical compound [O-2].[O-2].[Ti+4].[O-2].[Al+3] PHTHEUNUXVDUOD-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
- B05B13/0228—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the movement of the objects being rotative
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
- B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
Landscapes
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
The invention discloses a spraying protection clamp and a spraying method for a front baffle of a low-pressure turbine. The positioning plug is matched with the base, the base is fixed by screws, small holes are formed in the base and are used for being connected and fixed with the support columns, the support rings are placed at the upper ends of the support columns, parts and the protective cover are placed on the support rings, the protective cover is placed on the upper end face of the parts, and the protective cover is connected and fixed by the connecting device. The spraying protection clamp can effectively protect non-spraying areas of parts, has high part protection efficiency, can be repeatedly used, has low cost and high clamping concentricity and coaxiality of parts, and further improves the quality of the sprayed coating.
Description
Technical Field
The invention belongs to the technical field of surface engineering of aeroengines, and particularly relates to a plasma spraying protective clamp and a spraying method for a front baffle part of a low-pressure turbine of an aeroengine.
Background
As shown in fig. 1, a front baffle part of a low-pressure turbine of an aeroengine needs to be coated with aluminum oxide-titanium dioxide (Al 2 O 3 ·TiO 2 ) And coating to increase the sealing performance and wear resistance of the metal alloy with the corresponding parts. The rest areas of the parts except the sealing comb teeth need to be protected during spraying, and sand blowing and coating spraying are not allowed.
The protection means commonly used in the industry at present are manually attached with a protection adhesive tape, and the protection device has the advantages of low protection efficiency, high cost, poor quality and no special protection clamp.
Disclosure of Invention
The invention aims to provide a spraying protection clamp and a spraying method for a front baffle of a low-pressure turbine, which can protect a non-spraying area of a part, improve the protection efficiency of the part, reduce the cost and improve the quality of a coating.
According to the part structure and the spraying area, the special spraying protection clamp is designed in a pioneering way, so that the protection efficiency is remarkably improved, the cost is reduced, and the quality of the part coating is improved. The technical scheme adopted by the invention is as follows:
a low pressure turbine front baffle spray protection fixture comprising:
the positioning plug is provided with a first positioning surface and a second positioning surface with different outer diameters, and is matched with a groove on the turntable of the spraying equipment in a positioning way through the first positioning surface;
the base is provided with a connecting hole at the center and is in plug-in fit with the second positioning surface of the positioning plug through the connecting hole, a plurality of notches and support column mounting holes are also formed in the base, and the base is connected to the turntable of the spraying equipment through screws arranged in the notches;
the first ends of the support columns are spliced in the support column mounting holes of the base;
the support ring is connected with the second ends of the support columns, and the surface of the support ring forms a placement surface of the front baffle of the low-pressure turbine;
the protective cover is arranged on the end surface of the support ring, which is far away from the base, and forms a shielding surface for a non-spraying area on the front baffle of the low-pressure turbine;
the protective cover plate and the protective cover are mounted on the same side of the supporting ring and connected with the supporting ring together, and the protective cover plate forms a shielding surface for a non-spraying area on the front baffle plate of the low-pressure turbine.
Further, the positioning plug is also provided with a threaded hole; the connecting hole circumference of base is arranged with the screw hole, the locating plug passes through the screw connection of installing in the screw hole on the base.
Further, the notch is a plurality of U-shaped grooves distributed on the edge of the base, and T-shaped groove screws are arranged in the U-shaped grooves.
Further, a circle of annular protrusions are arranged on the end face of the supporting ring, and the outer diameter of each annular protrusion is smaller than the inner diameter of the inner ring of the front baffle of the low-pressure turbine.
Furthermore, the protective cover is formed by splicing two half symmetrical structures along a symmetrical plane.
Further, the base, the support ring and the protective cover plate are all provided with lightening holes.
Further, protection casing and protective cover plate are all connected with the support ring through connecting device, and connecting device includes nut, screw and rubber cover, and the rubber cover parcel is at the surface of nut and screw.
The spraying method of the front baffle of the low-pressure turbine adopts the spraying protection clamp and comprises the following steps:
firstly, integrally placing a spraying protection clamp on a spraying equipment turntable through a base and a positioning plug, ensuring that a first positioning surface of the positioning plug is matched with a groove on the spraying equipment turntable in a positioning manner in the placing process, and then fixing the spraying protection clamp on the spraying equipment turntable through a notch on the base;
step two, taking down the protective cover and the protective cover plate, placing the low-pressure turbine front baffle plate on the support ring, and reconnecting the protective cover and the protective cover plate on the support ring;
and thirdly, starting sand blowing and spraying operation.
Compared with the prior art, the spraying protection clamp and the spraying method have the following characteristics:
(1) The fixture is adopted for protection, so that the operation time is greatly reduced, and the protection efficiency of spraying processing is improved;
(2) The spraying protective clamp can be repeatedly used, so that the spraying processing cost of parts is reduced;
(3) The quick positioning and clamping of the parts are realized, concentricity and parallelism of the parts during spraying are ensured, and the quality of the coating of the parts during spraying is improved;
(4) The spraying protective clamp uses aluminum alloy materials, has a weight-reducing design, and has the advantages of light weight, rust resistance, simple operation and convenient use.
Drawings
FIG. 1 is an overall view of a spray guard fixture of the present invention;
FIG. 2 is an exploded view of the spray guard fixture of the present invention (without connectors and fasteners);
FIG. 3 is a block diagram of a positioning plug;
FIG. 4 is a block diagram of a base;
FIG. 5 is a block diagram of a support column;
FIG. 6 is a support ring construction diagram;
FIG. 7 is a diagram of the shield construction;
FIG. 8 is a block diagram of a protective cover plate;
FIG. 9 is a block diagram of a connection device;
in the figure: 1-positioning plug, 2-base, 3-support column, 4-support ring, 5-protection casing, 6-protection apron, 7-connecting device.
Detailed Description
The present invention will be further described with reference to the drawings and the specific embodiments, but it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments, and various modifications, substitutions and alterations made according to the ordinary skill and familiar means of the art to which this invention pertains are included within the scope of the present invention without departing from the above technical idea of the invention.
As shown in fig. 2, the spraying protection fixture for the front baffle of the low-pressure turbine of the aero-engine designed in the embodiment comprises the following main components: the positioning plug 1, the base 2, the support column 3, the support ring 4, the protective cover 5, the protective cover plate 6 and the connecting device 7, and some fasteners.
The structure and the functions of each component are as follows:
positioning plug 1: as shown in fig. 3, the positioning plug 1 is in a columnar shape and is divided into a large end and a small end, 4 threaded holes are formed in the end face of the large end cylinder, when the spraying protection clamp is used, the positioning plug 1 is located at the bottommost part of the whole clamp, the small end cylinder is matched with the base 2 in fig. 2 to play a role in connection, the 4 threaded holes on the large end cylinder are matched with screws to play a role in fixation, the large end cylinder is matched with a groove on the spraying turntable to play a role in quick positioning, quick clamping and concentricity during part spraying processing, the clamping time is shortened, the coating thickness uniformity is improved, and the part processing efficiency and the coating quality are improved.
Base 2: as shown in fig. 4, the base 2 is in the shape of an annular disk, and the outermost end of the base is provided with 6U-shaped grooves, and the U-shaped grooves are fixed on the spraying turntable by using T-shaped groove screws to play a role in fixing. The small holes at 6 are matched with the support columns 3 in the figure 2 to play a role in positioning and supporting. The effect of 6 place lightening holes is to reduce anchor clamps overall weight, convenient operation and use. The central connecting hole is matched with the positioning plug 1 in fig. 2, and plays a role in connection and fixation. The base 2 integrally plays roles of connection, support and fixation, and in addition, the flatness of parts during spraying processing can be guaranteed, and the quality of a spraying processing coating is improved.
Support column 3: as shown in fig. 5, the support column 3 is columnar, the lower end is connected with the base 2 in fig. 2, and the upper end is connected with the support ring 4 in fig. 2, so that the main function is to empty the part, prevent the powder from piling up and sputtering in the spraying process, and improve the coating quality.
Support ring 4: as shown in fig. 6, the support ring 4 is in the shape of an annular disk, and has the main function of supporting parts, and the parts are placed in an annular area of the end face of the support ring 4, specifically between the outer side of the annular bulge of the end face of the support ring 4 and the outer contour of the support ring 4 when the clamp is in use.
And a protective cover 5: as shown in fig. 7, the shape of the protective cover 5 is a ring shape, and the protective cover is a half-cut structure, so that the protective cover is convenient to clamp, and has the main functions of protecting non-spraying areas of parts and improving the protection efficiency of the parts.
Protective cover plate 6: as shown in fig. 8, the protective cover plate 6 is in an annular disc shape, and has the main function of protecting a non-spraying area of a part and improving the spraying protection efficiency of the part. In addition, 4 weight-reducing fan-shaped grooves are designed, so that the weight of the clamp is reduced, and the operation and the use are convenient.
Connection means 6: as shown in fig. 9, the connecting device 7 is composed of a screw, a nut and a rubber cover, and is mainly used for connecting the protective cover 5 and the protective cover plate 6, and the rubber cover is used for protecting the screw and the nut, so that the screw and the nut are prevented from being adhered by spraying a coating, and cannot be removed.
The positioning plug 1, the base 2, the support column 3, the support ring 4, the protective cover 5 and the protective cover plate 6 are of an all-aluminum alloy structure, and the clamp has the characteristics of light weight, rust resistance, simplicity in operation and convenience in use, and can achieve the purposes of improving the spraying protection efficiency, reducing the cost and improving the coating quality of the front baffle part of the low-pressure turbine of the aeroengine.
As shown in fig. 1 and 2, the spraying protection fixture for the front baffle of the low-pressure turbine of the aeroengine is assembled by a positioning plug 1, a base 2, a support column 3, a support ring 4, a protection cover 5, a protection cover plate 6, a connecting device 7 and a fastener. The positioning plug 1 is matched with the base 2, 6 small holes are formed in the base 2 and are used for being fixedly connected with the support column 3, the support ring 4 is placed at the upper end of the support column 3, parts and the protective cover 5 are placed on the support ring 4, the protective cover 6 is placed on the upper end face of the parts, the protective cover 6 is fixedly connected with the connecting device 7, and all parts are fixed by using screws to form an integral clamp structure. The annular bulge (the structure that the upper end of the inner ring of the right picture of fig. 6 is upwards bulge), the protective cover 5 and the protective cover plate 6 are combined together to shield and protect other non-spraying surfaces except the sealing comb teeth (the position shown in fig. 1), and the process only relates to quick assembly, is more convenient and quick to paste compared with the traditional adhesive tape, and is also time-saving and labor-saving in later disassembly.
When the spraying protection clamp is used for spraying the front baffle of the low-pressure turbine, the spraying protection clamp is firstly placed on a spraying turntable of spraying equipment, the positioning plug 1 is rapidly positioned and clamped with a groove on the spraying turntable, a T-shaped groove screw is used for fixing a U-shaped groove at the edge of the base 2 and the groove on the turntable, then the protection cover plate 6 and the protection cover 5 are taken down, the front baffle of the low-pressure turbine is placed on the support ring 4, then the protection cover plate 6 and the protection cover 5 are clamped, and sand blowing and spraying operation can be started after completion.
What is not described in detail in the description of the invention belongs to the prior art known to those skilled in the art. While the foregoing describes illustrative embodiments of the present invention to facilitate an understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, but is to be construed as protected by the accompanying claims insofar as various changes are within the spirit and scope of the present invention as defined and defined by the appended claims.
Claims (8)
1. A low pressure turbine front baffle spray protection fixture, comprising:
the positioning plug (1) is provided with a first positioning surface and a second positioning surface with different outer diameters, and the positioning plug (1) is matched with a groove on a turntable of the spraying equipment in a positioning way through the first positioning surface;
the base (2) is provided with a connecting hole at the center and is in plug-in fit with the second positioning surface of the positioning plug (1) through the connecting hole, the base (2) is also provided with a plurality of notches and support column mounting holes, and the base (2) is connected to the turntable of the spraying equipment through screws arranged in the notches;
the first ends of the support columns (3) are inserted into support column mounting holes of the base (2);
the support ring (4) is connected with the second ends of the support columns (3), and the surface of the support ring (4) forms a placement surface of the front baffle of the low-pressure turbine;
the protective cover (5) is arranged on the end surface of the support ring (4) far away from the base (2) to form a shielding surface for a non-spraying area on the front baffle of the low-pressure turbine;
the protective cover plate (6), the protective cover plate (6) is installed on the same side of the support ring (4) together with the protective cover (5) and is connected with the support ring (4), and the protective cover plate (6) forms a shielding surface for a non-spraying area on the front baffle of the low-pressure turbine.
2. The low pressure turbine front baffle spray protection fixture of claim 1, wherein:
the positioning plug (1) is also provided with a threaded hole;
threaded holes are circumferentially arranged in the connecting holes of the base (2),
the positioning plug (1) is connected to the base (2) through a screw arranged in the threaded hole.
3. The low pressure turbine front baffle spray protection fixture of claim 1, wherein: the notch is a plurality of U-shaped grooves distributed on the edge of the base (2), and T-shaped groove screws are arranged in the U-shaped grooves.
4. The low pressure turbine front baffle spray protection fixture of claim 1, wherein: the end face of the supporting ring (4) is provided with a circle of annular bulge, and the outer diameter of the annular bulge is smaller than the inner diameter of the inner ring of the front baffle of the low-pressure turbine.
5. The low pressure turbine front baffle spray protection fixture of claim 1, wherein: the protective cover (5) is formed by splicing two half symmetrical structures along a symmetrical plane.
6. The low pressure turbine front baffle spray protection fixture of claim 1, wherein: weight reducing holes are formed in the base (2), the supporting ring (4) and the protective cover plate (6).
7. The low pressure turbine front baffle spray protection fixture of claim 1, wherein: the protection cover (5) and the protection cover plate (6) are connected with the support ring (4) through the connecting device (7), and the connecting device (7) comprises a nut, a screw and a rubber cover, and the rubber cover wraps the outer surfaces of the nut and the screw.
8. A spraying method of a front baffle of a low-pressure turbine is characterized by comprising the following steps of: the spray protection fixture of claim 1 is employed and comprises the steps of:
firstly, integrally placing a spraying protection clamp on a spraying equipment turntable through a base (2) and a positioning plug (1), ensuring that a first positioning surface of the positioning plug (1) is matched with a groove on the spraying equipment turntable in a positioning manner in the placing process, and then fixing the spraying protection clamp on the spraying equipment turntable through a notch on the base (2);
step two, taking down the protective cover (5) and the protective cover plate (6), placing the low-pressure turbine front baffle plate on the support ring (4), and reconnecting the protective cover (5) and the protective cover plate (6) on the support ring (4);
and thirdly, starting sand blowing and spraying operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311582547.2A CN117380431A (en) | 2023-11-24 | 2023-11-24 | Spraying protection clamp and spraying method for front baffle of low-pressure turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311582547.2A CN117380431A (en) | 2023-11-24 | 2023-11-24 | Spraying protection clamp and spraying method for front baffle of low-pressure turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117380431A true CN117380431A (en) | 2024-01-12 |
Family
ID=89441143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311582547.2A Pending CN117380431A (en) | 2023-11-24 | 2023-11-24 | Spraying protection clamp and spraying method for front baffle of low-pressure turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117380431A (en) |
-
2023
- 2023-11-24 CN CN202311582547.2A patent/CN117380431A/en active Pending
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