CN111957464A - Blade shroud spraying protection clamp and method for turbine blade - Google Patents
Blade shroud spraying protection clamp and method for turbine blade Download PDFInfo
- Publication number
- CN111957464A CN111957464A CN202010612912.XA CN202010612912A CN111957464A CN 111957464 A CN111957464 A CN 111957464A CN 202010612912 A CN202010612912 A CN 202010612912A CN 111957464 A CN111957464 A CN 111957464A
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- blade
- turbine blade
- shroud
- clamping mechanism
- frame
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- 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
- B05B13/0292—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work devices for holding several workpieces to be sprayed in a spaced relationship, e.g. vehicle doors spacers
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- 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
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a turbine blade shroud spraying protection clamp and a turbine blade shroud spraying method, wherein the turbine blade shroud spraying protection clamp comprises a frame, a first clamping mechanism and a second clamping mechanism, the first clamping mechanism and the second clamping mechanism are arranged on the outer wall surface of the frame, the first clamping mechanism and the second clamping mechanism are oppositely arranged along the height direction of the frame, the first clamping mechanism is used for abutting against the upper surface of a turbine blade shroud and protecting the upper surface of the turbine blade shroud during spraying operation, a positioning groove which is obliquely arranged relative to the frame in the horizontal direction is concavely arranged on the upper surface of the second clamping mechanism, the second end of a turbine blade body is obliquely arranged in the positioning groove along the direction matched with the positioning groove and abuts against the groove bottom surface of the positioning groove, and the first clamping mechanism and the second clamping mechanism clamp and fix a turbine blade to be machined so that the turbine blade shroud is arranged along the horizontal direction. The blade shroud spraying protection clamp for the turbine blade only needs to move the spray gun back and forth for spraying during spraying operation, and is beneficial to controlling the spraying quality of the blade shroud.
Description
Technical Field
The invention relates to the technical field of spraying protection of aviation turbine blades, in particular to a blade shroud spraying protection clamp of a turbine blade. In addition, the invention also relates to a spraying method of the blade shroud of the turbine blade.
Background
The turbine working blade is an important part on power machinery such as an aircraft engine, a steam turbine, a gas turbine and the like, and is assembled on the turbine part of the engine in a whole disc mode. The substrate is usually made of high temperature material, and needs to work in extreme environment of high temperature and high pressure. In general, in order to ensure the long-term reliable operation of the turbine working blade, a wear-resistant coating is sprayed on the matching surface of the shroud of each turbine blade so as to play the roles of micro-motion wear resistance and blade service life prolonging.
As shown in fig. 1, the turbine blade 10 to be processed includes a tip shroud 11, a blade body 121, and a blade tenon 122 arranged along a span direction (a length direction) of the turbine blade 10, where the tip shroud 11 is disposed at a first end of the blade body 12, and because the tip shroud 11 is inclined along a chord direction of the turbine blade 10 to be processed and forms an angle α with a bottom surface of the blade tenon 122, the tip shroud 11 is inclined along the chord direction of the turbine blade 10 to be processed and forms an angle α with a horizontal plane, one side wall surface of the tip shroud 11 is a spraying surface of the tip shroud 11, and the rest is a protection surface of the tip shroud 11. When the outer wall surface of the blade shroud 11 is sprayed, the protective surface of the blade shroud 11, the blade body 121 and the tenon teeth cannot be adhered with the sprayed coating. In addition, the tenon tooth part is subjected to surface infiltration layer treatment in the former process, the surface infiltration layer of the tenon tooth is not allowed to be collided and damaged during spraying, and the protection clamp needs to flexibly protect the tenon tooth.
A large number of turbine blades in an aero-engine and a gas turbine need to be sprayed and protected, and due to the fact that the overall dimension of a region to be protected of parts is small and the requirement on protection accuracy is high, the following two common protection methods exist at present: the protection method has the advantages of high protection precision and good protection effect, but the protection method needs the heat-insulating adhesive tape and is high in production cost; secondly, a spraying protection clamp is used for protection, and due to the structural rule of the tenon tooth of the turbine blade, the existing protection scheme is that the tenon tooth is used as a positioning reference for tooling design, namely, the turbine blade is sprayed and processed in a vertical arrangement state, and an aluminum alloy hole is used for protection at a blade crown.
Disclosure of Invention
The invention provides a blade shroud spraying protection clamp for a turbine blade, which aims to solve the technical problems that the spraying efficiency is low and the thickness of a sprayed surface coating is inconsistent when the outer wall surface of a blade shroud of the turbine blade is sprayed and processed in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a turbine blade's blade shroud spraying protection anchor clamps, treat that processing turbine blade includes the blade shroud and the blade body of arranging along its span direction, the first end of blade body is located to the blade shroud, the blade shroud that sets up along turbine blade's chord-wise slope is alpha degree with the contained angle of horizontal plane, turbine blade's blade shroud spraying protection anchor clamps include the frame, locate first fixture and second fixture on the outer wall of frame, first fixture and second fixture lay relatively along the direction of height of frame, it is fixed along the direction of height of frame to treat processing turbine blade and make treating processing turbine blade along the direction of height of frame with vertical setting up to the combined action centre gripping, first fixture is used for supporting with the upper surface of blade shroud and protects the upper surface of blade shroud when the spraying operation, second fixture's upper surface concave be equipped with the positioning groove of laying for the frame slope in the horizontal direction, the second end of blade body is located in the positioning groove and with positioning groove's groove along the slant with positioning groove assorted slant The bottom surface butt, first fixture and the common centre gripping of second fixture and fixed turbine blade of treating processing so that the blade crown lays along the horizontal direction.
Further, the outer wall of frame caves in and is formed with and holds the recess, second fixture is including locating location backup pad and the jacking portion that holds in the recess, the location backup pad is laid with first fixture relatively, the downside of location backup pad is located to the jacking portion, the concave positioning groove who lays for the frame slope in the horizontal direction that is equipped with of upper surface of location backup pad, the second end of leaf body is followed and is located in the positioning groove and with positioning groove's tank bottom butt with positioning groove assorted slant, the positioning backup pad sets up movably along the direction of height of frame, the lower surface butt of jacking portion and positioning backup pad, it slides along the direction of height of frame to drive the positioning backup pad through the jacking portion, so that the positioning backup pad and first fixture combined action centre gripping and fixed turbine blade of waiting to process.
Furthermore, the first clamping mechanism comprises a clamping baffle arranged corresponding to the positioning groove, the clamping baffle is made of Teflon materials, a pressing groove used for pressing the blade shroud is formed in the lower surface of the clamping baffle, and the bottom of the pressing groove is arranged along the horizontal direction.
Further, the groove bottom surface of the positioning groove is provided with a flexible layer.
Further, the location backup pad is the wedge board, and the lower surface of location backup pad sets up for the frame slope in the horizontal direction, and jacking portion is including locating the jacking board of holding in the recess and corresponding laying with the location backup pad, and the upper surface of jacking board is laid for the frame slope in the horizontal direction, and the lower surface of jacking board and the tank bottom butt that holds the recess, the upper surface and the cooperation of location backup pad inclined plane of jacking board are in order to support location backup pad.
Furthermore, the length dimension of the jacking plate is smaller than the groove diameter of the accommodating groove, so that the jacking plate can be slidably arranged in the accommodating groove along the horizontal direction, and the jacking plate slides along the horizontal direction and is matched with the inclined surface of the positioning support plate through the jacking plate so as to drive the positioning support plate to move along the height direction of the frame.
Further, the bottom of the lateral wall of the both sides of frame is equipped with respectively and holds the application of force that the recess communicates and dodge the hole, dodge the hole application of force through the application of force and drive the jacking board and slide along the horizontal direction.
Furthermore, the outer wall surface of the positioning support plate protrudes out of the outer wall surface of the clamping baffle plate, so that the outer wall surface of the blade shroud after the turbine blade to be machined is clamped and fixed protrudes out of the outer wall surface of the clamping baffle plate.
Further, turbine blade's blade shroud spraying protection anchor clamps still including locating the panel that is used for covering on the frame and holds the recess, protect the blade body of waiting to process turbine blade when spraying the operation through the panel, are equipped with the sealing strip between panel and the centre gripping baffle.
The invention also provides a spraying method of the blade shroud of the turbine blade, which adopts the spraying protection clamp of the blade shroud of the turbine blade and comprises the following steps:
the blade body of the turbine blade to be machined is obliquely arranged in the positioning groove of the second clamping mechanism, and the turbine blade to be machined is clamped and positioned between the first clamping mechanism and the second clamping mechanism, so that the blade crown of the turbine blade to be machined is arranged along the horizontal direction;
and spraying the outer wall surface of the blade crown of the turbine blade to be processed.
The invention has the following beneficial effects:
the blade shroud spraying protection clamp for the turbine blade comprises a frame, a first clamping mechanism and a second clamping mechanism, wherein the first clamping mechanism and the second clamping mechanism are oppositely arranged to clamp the turbine blade to be machined which is vertically arranged, and the turbine blade to be machined is fixed in the height direction of the frame, so that the turbine blade to be machined can be conveniently positioned; the first clamping mechanism is used for abutting against the upper surface of the blade shroud and protecting the upper surface of the blade shroud during spraying operation, the upper surface of the second clamping mechanism is concavely provided with a positioning groove which is obliquely arranged relative to the frame in the horizontal direction, the second end of the blade body is obliquely arranged in the positioning groove along the direction matched with the positioning groove and abuts against the groove bottom surface of the positioning groove, the first clamping mechanism and the second clamping mechanism jointly clamp and fix the turbine blade to be processed so that the blade shroud is arranged along the horizontal direction, and because the area to be sprayed of the outer wall surface of the blade shroud of the turbine blade to be processed is parallel and level along the horizontal direction, during spraying operation, a spray gun only needs to move back and forth to spray, so that the spraying quality of the blade shroud is favorably controlled, and the existing placing and fixing mode that an included angle is left between the spraying area of the outer wall surface of the blade shroud and the horizontal plane after the blade, the spraying area in the vertical direction is large, the spray gun needs to be adjusted to perform back and forth spraying, the spraying times of the upper edge and the lower edge of the blade shroud are few, the spraying times of the middle part are many, and the consistency of the coating thickness is poor.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a turbine blade to be machined in accordance with a preferred embodiment of the present invention;
FIG. 2 is a structural schematic view from a first perspective of a shroud spray containment fixture for a turbine blade of a turbine blade in accordance with a preferred embodiment of the present invention;
FIG. 3 is a structural schematic view from a second perspective of a shroud spray containment fixture for a turbine blade of the preferred embodiment of the present invention;
FIG. 4 is a front view of a shroud spray shield fixture for a turbine blade of the preferred embodiment of the present invention;
FIG. 5 is a cross-sectional view at C-C of FIG. 4;
FIG. 6 is a flow chart of a method of shroud spray coating a turbine blade in accordance with a preferred embodiment of the present invention.
Illustration of the drawings:
10. a turbine blade to be machined; 11. a leaf shroud; 12. a leaf body; 121. a leaf body; 122. a leaf tenon; 20. spraying a protective clamp on a blade shroud of the turbine blade; 21. a frame; 211. an accommodating recess; 212. applying a force to avoid the hole; 22. a first clamping mechanism; 221. clamping the baffle; 23. a second clamping mechanism; 231. positioning the supporting plate; 2311. a positioning groove; 232. a jacking plate; 24. a panel; 25. a sealing strip.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be embodied in many different forms, which are defined and covered by the following description.
FIG. 1 is a schematic structural view of a turbine blade to be machined in accordance with a preferred embodiment of the present invention; FIG. 2 is a structural schematic view from a first perspective of a shroud spray containment fixture for a turbine blade of a turbine blade in accordance with a preferred embodiment of the present invention; FIG. 3 is a structural schematic view from a second perspective of a shroud spray containment fixture for a turbine blade of the preferred embodiment of the present invention; FIG. 4 is a front view of a shroud spray shield fixture for a turbine blade of the preferred embodiment of the present invention; FIG. 5 is a cross-sectional view at C-C of FIG. 4; FIG. 6 is a flow chart of a method of shroud spray coating a turbine blade in accordance with a preferred embodiment of the present invention.
As shown in fig. 1, 2 and 3, a turbine blade shroud spraying protection fixture 10 for a turbine blade according to an embodiment of the present invention includes a turbine blade to be processed 10 and a turbine blade main body 12, the turbine blade to be processed 10 includes a turbine shroud 11 and a turbine blade main body 12 arranged in a span direction thereof, the turbine shroud 11 is disposed at a first end of the turbine blade main body 12, an included angle between the turbine shroud 11 obliquely disposed in a chord direction of the turbine blade and a horizontal plane is α degrees, the turbine blade shroud spraying protection fixture for a turbine blade includes a frame 21, and a first clamping mechanism 22 and a second clamping mechanism 23 disposed on an outer wall surface of the frame 21, the first clamping mechanism 22 and the second clamping mechanism 23 are relatively disposed in a height direction of the frame 21 to clamp the turbine blade to be processed 10 vertically disposed and fix the turbine blade to be processed 10 in the height direction of the frame 21, the first clamping mechanism 22 is configured to abut against an upper surface of the turbine shroud 11 and protect the upper surface of the, the upper surface of the second clamping mechanism 23 is concavely provided with a positioning groove 2311 which is obliquely arranged relative to the frame 21 in the horizontal direction, the second end of the blade body 12 is obliquely arranged in the positioning groove 2311 along the direction matched with the positioning groove 2311 and is abutted against the groove bottom surface of the positioning groove 2311, and the first clamping mechanism 22 and the second clamping mechanism 23 clamp and fix the turbine blade 10 to be processed together so as to arrange the blade shroud 11 in the horizontal direction.
The blade shroud spraying protection clamp 10 for the turbine blade comprises a frame 21, a first clamping mechanism 22 and a second clamping mechanism 23, wherein the first clamping mechanism 22 and the second clamping mechanism 23 are oppositely arranged to clamp the turbine blade 10 to be machined, which is vertically arranged, and the turbine blade 10 to be machined is fixed along the height direction of the frame 21, so that the turbine blade 10 to be machined is conveniently positioned; the first clamping mechanism 22 is used for abutting against the upper surface of the blade shroud 11 and protecting the upper surface of the blade shroud 11 during spraying operation, the upper surface of the second clamping mechanism 23 is concavely provided with a positioning groove 2311 which is obliquely arranged relative to the frame 21 in the horizontal direction, the second end of the blade body 12 is obliquely arranged in the positioning groove 2311 along the direction matched with the positioning groove 2311 and abuts against the groove bottom surface of the positioning groove 2311, the first clamping mechanism 22 and the second clamping mechanism 23 jointly clamp and fix the turbine blade 10 to be processed so that the blade shroud 11 is arranged in the horizontal direction, because the area to be sprayed on the outer wall surface of the blade shroud 11 of the turbine blade 10 to be processed is flush in the horizontal direction, during spraying operation, a spray gun only needs to move back and forth to spray, the spraying quality of the blade shroud 11 is favorably controlled, and the existing placing and fixing mode that an included angle is left between the spraying area on the outer wall surface of the blade shroud 11 and the outer wall surface of the blade shroud 11 after the, the area to be sprayed in the vertical direction is large, the spray gun needs to be adjusted to spray up and down, and the technical problems that the spraying frequency of the upper edge and the lower edge of the blade shroud 11 is low, the middle spraying frequency is high, and the consistency of the coating thickness is poor are caused.
It is understood that the first clamping mechanism 22 may be a supporting plate with a positioning groove or a clamping block with a positioning groove, and the second clamping mechanism 23 may be a clamping plate with teflon coating, as long as the turbine blade to be processed can be clamped by the first clamping mechanism 22 and the second clamping mechanism 23, and the turbine blade to be processed 100 is arranged so that the tip shroud 11 is arranged in the horizontal direction.
It is understood that the upper surface of the second holding mechanism 23 is concavely provided with the positioning groove 2311 obliquely arranged in the horizontal direction with respect to the frame 21. it is understood that the upper surface of the second holding mechanism 23 is concavely provided with the positioning groove 2311 obliquely arranged in the horizontal direction; the second end of the blade body 12 is obliquely disposed in the positioning groove 2311 matching with the positioning groove 2311 and abuts against the groove bottom surface of the positioning groove 2311, and it can be understood that the second end of the blade body 12 is obliquely disposed in the positioning groove 2311 and abuts against the groove bottom surface of the positioning groove 2311.
Referring to fig. 2 again, the number of the positioning grooves 2311 may be multiple, the multiple positioning grooves are uniformly arranged along the length direction of the frame 21 at intervals to perform the spraying operation on the outer wall surface of the shroud 11 after fixing the multiple turbine blades 10 to be processed, and the groove diameter of the positioning groove 2311 is matched with the size of the bottom end of the blade body 12 of the turbine blade 10 to be processed. Optionally, the positioning groove 2311 is obliquely arranged along the horizontal direction, specifically, an included angle of α degrees is left between the groove bottom surface of the positioning groove 2311 and the horizontal plane, the height of the groove wall of the first side of the positioning groove 2311 is smaller than the height of the groove wall of the second side of the positioning groove 2311, and the bottom end of the blade body 12 is obliquely arranged in the positioning groove 2311 and abutted against the groove bottom of the positioning groove 2311, so that the first clamping mechanism 22 and the second clamping mechanism 23 jointly clamp and fix the turbine blade 10 to be processed, so that the blade shroud 11 is arranged along the horizontal direction.
Specifically, the turbine blade 10 to be processed includes the tip shroud 11, the blade body 121, and the tenon 122 arranged along the span direction thereof, the tip shroud 11 is disposed at the first end of the blade body 12, the bottom end of the blade body 12 is obliquely disposed in the positioning groove 2311 and abuts against the groove bottom of the positioning groove 2311, that is, the tenon 122 of the turbine blade 10 to be processed is obliquely disposed in the positioning groove 2311 and abuts against the groove bottom of the positioning groove 2311.
Further, the outer wall surface of the frame 21 is recessed to form an accommodating groove 211, the second clamping mechanism 23 includes a positioning support plate 231 and a jacking portion which are arranged in the accommodating groove 211, the positioning support plate 231 is arranged opposite to the first clamping mechanism 22, the jacking portion is arranged on the lower side of the positioning support plate 231, the upper surface of the positioning support plate 231 is recessed to form a positioning groove 2311 which is obliquely arranged relative to the frame 21 in the horizontal direction, the second end edge of the blade body 12 is matched with the positioning groove 2311, the positioning support plate 231 is movably arranged along the height direction of the frame 21, the jacking portion is abutted to the lower surface of the positioning support plate 231, the positioning support plate 231 is driven to slide along the height direction of the frame 21 through the jacking portion, so that the positioning support plate 231 and the first clamping mechanism 22 jointly clamp and fix the turbine blade 10 to be processed. The positioning support plate 231 is driven by the jacking portion to slide along the height direction of the frame 21, so that the positioning support plate 231 is positioned between the clamping baffle 221 and the jacking portion. It can be understood that, by providing the positioning groove 2311, it is convenient to form an avoiding space when mounting and fixing the turbine blade 10 to be machined, so that the blade to be machined is disposed in the avoiding space of the positioning groove 2311 and fixed between the positioning support plate 231 and the first clamping mechanism 22 along the height of the frame 21. It is understood that the lifting portion may be a lifting cylinder, a telescopic rod, a wedge plate, etc. for lifting the positioning support plate 231 by the lifting portion, so that the positioning support plate 231 is lifted along the height direction of the frame 21 to cooperate with the first clamping mechanism 22 to clamp the turbine blade 10 to be processed.
Further, the first clamping mechanism 22 includes a clamping baffle 221 arranged corresponding to the positioning groove 2311, the clamping baffle 221 is made of teflon material, a pressing groove for pressing the blade shroud 11 is arranged on the lower surface of the clamping baffle 221, and the groove bottom of the pressing groove is arranged along the horizontal direction. Alternatively, the number of the holding fences 221 is plural, and each holding fence 221 is arranged in one-to-one correspondence with each positioning groove 2311 on the positioning support plate 231. In the present invention, in order to improve the spraying accuracy of the turbine blade 10 to be processed, a teflon material is used for the spraying protection jig for the first time. In the prior art, the spraying protection clamp needs to resist high temperature, and has no obvious deformation after being used for many times, and the protection structure at the spraying part is usually made of metal. The spray protection of the blade crown 11 is carried out by using the Teflon material, and after the clamping baffle 221 made of the Teflon material is continuously sprayed for multiple times, the protection part still has no obvious deformation; the Teflon and the coating have poor bonding property, and the cleaning is simple after spraying, so that the phenomenon of bridging between the coating and a clamp is avoided; the Teflon has low hardness, can not scratch the surface of the blade crown 11, generates micro deformation under the action of the assembling clamping force, ensures the close fit with the surface of the blade crown 11 and can prevent sprayed powder from entering parts needing protection; the clamping baffle 221 made of Teflon material is easy to process, and can meet the high precision requirement of manufacturing the protective clamp. Due to the use of teflon material, it has a certain flexibility, when the turbine blade 10 to be processed is clamped and positioned between the positioning support plate 231 and the clamping baffle 221 by jacking up the positioning support plate 231 through the jacking portion, the clamping baffle 221 will undergo appropriate elastic deformation to fit the top surface of the blade shroud 11.
Alternatively, the clamping mechanism may be detachably provided to the upper end of the frame 21. Specifically, in the present embodiment, the clamping baffle 221 is fixedly provided on the frame 21 by a positioning bolt. After the clamping baffle 221 is damaged, the clamping baffle is convenient to replace quickly.
More preferably, the indent includes a first indent and a second indent, the first indent is used for matching with the side wall surfaces of both sides of the tip shroud 11 and pressing the crown body of the tip shroud 11, the second indent is used for matching with the crown tip of the tip shroud 11 and pressing the crown tip of the tip shroud 11, the groove bottom of the first indent is a plane laid along the horizontal direction, and the cross section of the second indent is in the shape of a triangle matched with the crown tip of the tip shroud 11. Referring to the figure again, the blade shroud 11 of the turbine blade 10 to be processed is irregular in structure and is a multi-arc surface, due to the fact that the arc structure is difficult to process, the baffle is designed to be an arc surface which is completely attached to the blade shroud 11 and has the defects of being uneconomical and poor in feasibility.
Further, the groove bottom surface of the positioning groove 2311 is provided with a flexible layer. Because the tenon tooth part of the tenon 122 of the turbine blade 10 to be processed is subjected to the layer penetrating treatment, the spraying process is prevented from being scratched, the flexible material is positioned and clamped, the flexible layer made of the polyurethane material is glued at the contact part of the positioning support plate 231 and the tenon tooth, the phenomenon that the penetrating layer is adversely affected when the clamping force is large enough is ensured, and the damage of the penetrating layer is avoided. Preferably, the side walls of the positioning grooves 2311 of the positioning support plate 231 are also glued with a flexible layer of polyurethane material.
Further, the positioning support plate 231 is a wedge-shaped plate, the lower surface of the positioning support plate 231 is obliquely arranged relative to the frame 21 in the horizontal direction, the jacking portion comprises a jacking plate 232 which is arranged in the accommodating groove 211 and correspondingly arranged with the positioning support plate 231, the upper surface of the jacking plate 232 is obliquely arranged relative to the frame 21 in the horizontal direction, the lower surface of the jacking plate 232 is abutted against the groove bottom of the accommodating groove 211, and the upper surface of the jacking plate 232 is matched with the inclined surface of the positioning support plate 231 to support the positioning support plate 231. Optionally, the positioning support plate 231 is a wedge-shaped plate, the lower surface of the positioning support plate 231 is obliquely arranged along the horizontal direction, the jacking portion includes a jacking plate 232 which is arranged in the accommodating groove 211 and is correspondingly arranged with the positioning support plate 231, the upper surface of the jacking plate 232 is obliquely arranged along the horizontal direction, the lower surface of the jacking plate 232 is abutted against the groove bottom of the accommodating groove 211, and the upper surface of the jacking plate 232 is matched with the inclined surface of the positioning support plate 231 to support the positioning support plate 231. Specifically, in the present embodiment, the height value of the right wall surface of the positioning support plate 231 is smaller than the height value of the left wall surface.
Further, the length of the lifting plate 232 is smaller than the groove diameter of the accommodating groove 211, so that the lifting plate 232 can be slidably disposed in the accommodating groove 211 along the horizontal direction, and the lifting plate 232 slides along the horizontal direction and drives the positioning support plate 231 to move along the height direction of the frame 21 through the inclined surface matching of the lifting plate 232 and the positioning support plate 231. Specifically, in the present embodiment, in order to support the positioning support plate 231 by the lifting plate 232 in cooperation with the positioning support plate 231, the height value of the right arm surface of the lifting plate 232 is larger than the height value of the left wall surface, and the upper surface of the lifting plate 232 is arranged to be inclined at an angle α in the horizontal direction.
Further, in order to facilitate the adjustment of the lifting plate 232 from the outside by applying force, the lifting plate 232 is lifted to the positioning support plate 231, the bottom of the side walls on both sides of the frame 21 are respectively provided with a force application avoiding hole 212 communicated with the accommodating groove 211, and the force application avoiding hole 212 applies force to drive the lifting plate 232 to slide along the horizontal direction. Specifically, when the lift plate 232 needs to be moved to the left, the force application roller is inserted from the force application avoiding hole 212 on the right side of the frame 21, and the force application roller is pressed against the side wall surface of the lift plate to move the lift plate.
Further, the outer wall surface of the positioning support plate 231 is disposed to protrude from the outer wall surface of the clamping baffle 221, so that the outer wall surface of the turbine blade 10 to be machined clamped and fixed to the trailing shroud 11 is disposed to protrude from the outer wall surface of the clamping baffle 221. It can be understood that the spray gun moves to cause a certain range of surface to be adhered with a coating during spraying, in order to avoid adhesion between the coating on the spraying surface of the blade shroud 11 and the coating on the protective baffle, and the coating of the blade shroud 11 is peeled off during later separation, therefore, when the clamping baffle 221 is designed, the distance between the outer wall surface of the clamping baffle 221 and the outer wall surface of the blade shroud 11 of the turbine blade 10 to be processed, namely the distance between the outer wall surface of the clamping baffle 221 and the positioning surface is controlled, so that the outer wall surface of the blade shroud 11 protrudes from the outer wall surface of the clamping baffle 221, because the outer wall surface of the clamping baffle 221 and the outer wall surface of the blade shroud 11 are not on the same plane, during spraying, the adhesiveness of the sprayed coating on the outer wall surface of the clamping baffle 221 and the outer wall surface of the blade shroud is different, the strength of the sprayed coating at the joint between the clamping baffle 221 and the blade shroud is low, and the blade shroud is convenient for, so as to reduce the condition of coating bridging, facilitate the post-treatment operation and ensure the coating quality of the blade shroud 11.
Further, the shroud spraying protection fixture 10 for the turbine blade includes a panel 24 provided on the frame 21 for covering the accommodating groove 211, and protects the blade body 121 during spraying operation, and a sealing strip 25 is provided between the panel 24 and the clamping flap 221. It will be appreciated that the sealing strip 25 is made of a silicone rubber material. In the present invention, in order to improve the spraying accuracy of the turbine blade 10 to be processed, a positioning support plate 231 having a silicone rubber coating and a clamping baffle 221 having a teflon material are fitted on a spraying protection jig for the first time. In the prior art, the spraying protection clamp needs to resist high temperature, and has no obvious deformation after being used for many times, and the protection structure at the spraying part is usually made of metal. The invention uses the clamping baffle 221 made of Teflon and the positioning support plate 231 with the silicon rubber layer to protect the turbine blade 10 to be processed when the spraying part of the blade shroud 11 is carried out. In general, Teflon and silicon rubber materials are high temperature resistant, and after continuous spraying is carried out for multiple times, the protective part still has no obvious deformation; the clamping baffle 221 made of Teflon material and the sealing strip 25 made of silicon rubber material have poor bonding property with the sprayed coating, and the cleaning is simple after spraying, so that the phenomenon of bridging between the coating and the clamp is avoided; the clamping baffle 221 made of the Teflon material and the sealing strip 25 made of the silicon rubber material have low hardness, so that the surface of the blade crown 11 cannot be scratched, and under the action of the assembling clamping force, the clamping baffle 221 made of the Teflon material and the sealing strip 25 made of the silicon rubber material generate micro deformation, so that the blade crown 11 is tightly attached to the surface, and spraying powder can be prevented from entering a part needing to be protected.
The invention also provides a spraying method of the blade shroud 11 of the turbine blade, which adopts the blade shroud spraying protection clamp 10 of the turbine blade and comprises the following steps: the blade body 12 of the turbine blade 10 to be machined is obliquely arranged in the positioning groove 2311 of the second clamping mechanism 23, and the turbine blade 10 to be machined is clamped and positioned between the first clamping mechanism 22 and the second clamping mechanism 23, so that the blade crown 11 of the turbine blade 10 to be machined is arranged along the horizontal direction; the outer wall surface of the tip shroud 11 of the turbine blade 10 to be machined is subjected to a spraying operation.
The invention provides a blade shroud spraying protection clamp 10 of a turbine blade, which has the following specific structure:
the lifting device comprises a frame 21 with a containing groove 211, a baffle arranged on the outer side wall of the upper end of the frame 21, a positioning support plate 231 movably arranged at the lower end of the frame 21 along the height direction of the frame 21 and a lifting plate 232 used for lifting the positioning support plate 231 and positioning the positioning support plate 231, wherein the positioning support plate 231 and the lifting plate 232 are both arranged in the containing groove 211, the positioning support plate 231 is slidably arranged along the height direction of the frame 21, the lower surface of the positioning support plate 231 is an inclined surface, the upper surface of the lifting plate 232 is an inclined surface matched with the lower surface of the positioning support plate 231, the lower surface of the lifting plate 232 is abutted against the groove bottom surface of the containing groove 211, the lifting plate 232 is slidably arranged along the width direction of the frame 21 so as to lift the positioning support plate 231 through the inclined surface matching, the positioning support plate 231 is oppositely arranged with the baffle so as, clamping the turbine blade 10 to be machined by the positioning support plate 231 and the clamping baffle plate 221 together so that the turbine blade 10 to be machined is fixed in the accommodating cavity of the frame 21 along the height direction of the frame 21; the upper surface of the positioning support plate 231 is concavely provided with a positioning groove 2311 obliquely arranged in the horizontal direction, the second end of the blade body 12 is obliquely arranged in the positioning groove 2311 and is abutted against the groove bottom surface of the positioning groove 2311, and the clamping baffle 221 is used for abutting against the upper surface of the blade shroud 11 and spraying and protecting the upper surface of the blade shroud 11, so that the blade shroud 11 behind the turbine blade is arranged in the horizontal direction. The clamping baffle 221 is made of teflon, and the groove wall surface of the positioning groove 2311 is provided with a flexible layer.
The invention provides a spraying method of a blade shroud 11 of a turbine blade, which comprises the following steps:
the lift plate 232 is moved in the width direction of the frame 21, and the positioning support plate 231 is slid downward in the height direction of the frame 21, thereby increasing the gap between the chucking baffle 221 and the positioning support plate 231. Specifically, a force application stick is inserted into the force application avoiding hole 212 on one side of the frame 21, so that the force application stick is abutted against the side wall surface of the lifting plate 232 to drive the lifting plate 232 to move along the width direction of the frame 21;
the turbine blade 10 to be machined is arranged between the clamping baffle 221 and the positioning support plate 231, specifically, the blade body 121 of the turbine blade to be machined is obliquely inserted into the positioning groove 2311 of the positioning support plate 231, and the blade tip of the turbine blade 10 to be machined is arranged in the pressing groove of the clamping baffle 221;
the lifting plate 232 is moved along the width direction of the frame 21, so that the positioning support plate 231 slides upwards along the height direction of the frame 21, and the lifting plate 232 pushes the positioning support plate 231, so that the positioning support plate 231 is matched with the clamping baffle 221, and the turbine blades are clamped and fixed together, so that the blade shroud 11 is arranged and increased between the clamping baffle 221 and the positioning support plate 231 along the horizontal direction. Specifically, a force application stick is inserted into the force application avoiding hole 212 on the other side of the frame 21, so that the force application stick is abutted against the side wall surface of the lifting plate 232 to drive the lifting plate 232 to move along the width direction of the frame 21;
the outer wall surface of the tip shroud 11 of the turbine blade 10 to be machined is subjected to a spraying operation.
The invention has the beneficial effects that:
in the prior art, the following two methods are generally adopted to perform the spraying process on the blade shroud 11 of the turbine blade: firstly, thermal-insulated sticky tape protection method, this protection method have the advantage that the protection precision is high, the protecting effect is good, this protection method's shortcoming has: the cost of the heat insulation adhesive tape is high, the value of one roll of adhesive tape is different from that of 300 plus 800 Yuan, 180 parts can be protected by one roll of adhesive tape according to the size of the blade shroud 11 of the turbine working blade, 192 parts of the turbine working blade need to be sprayed on one engine, and the cost is 800 Yuan at least; the thermal insulation tape has low protection efficiency, the blade shroud 11 of the turbine blade is irregular in shape and is connected with the runner surface and the blade body 121, when the thermal insulation tape is used for protection, the runner surface, the blade body 121, the tenon teeth and other parts need to be protected comprehensively, the processing time is long, and 400min is required for protecting one turbine blade; the heat insulation adhesive tape has a plurality of protective post-treatment processes. When the adhesive tape is used for protection, the adhesive tape needs to be completely removed after spraying, and a processing surface coating is not damaged, so that the operation is complicated; secondly, use spraying protection anchor clamps to protect, this protection method has the protection efficiency height, advantage with low costs, and this protection method's shortcoming has: the original processing method of the part is to use the tenon tooth as a positioning reference to carry out tool design, namely, spraying processing is carried out in a state that the turbine blade is vertically placed, in the state, an included angle is formed between a region to be sprayed of the turbine working blade and the horizontal direction, and during spraying processing, a spray gun needs to adjust the upper position and the lower position to carry out spraying back and forth, so that the effective spraying rate is low, the thicknesses of sprayed surface coatings are different, and the spraying size control is influenced; the blade shroud 11 is protected by the aluminum alloy holes, the design shows that the aluminum alloy holes and parts can have a bridging phenomenon during spraying, in order to prevent bridging, the holes cannot be tightly matched with the blade shroud 11, a gap of about 2mm needs to be reserved on one side, a coating spraying surface is formed on a non-spraying surface, and a worker needs to clean a residual coating subsequently; the contact position of the clamp and the surface to be processed has coating accumulation, and the clamp needs to be cleaned frequently, so that the workload is large. According to the invention, when the turbine blade 10 to be processed is fixed, the blade shroud 11 of the turbine blade 10 to be processed is horizontally arranged, the clamping baffle 221 is made of Teflon material, the outer wall surface of the blade shroud 11 of the turbine blade 10 to be processed protrudes out of the outer wall surface of the clamping baffle 221, the workload of auxiliary processes before and after spraying is reduced, and the processing efficiency of parts is improved; the consistency of spraying processing of the blade shroud 11 of the turbine blade is improved, the coating is prevented from being stripped, and the spraying quality is ensured; the production cost is reduced.
The spraying process route in the prior art is as follows: cleaning, sand blowing protection, sand blowing, spraying protection, spraying, cleaning after coating and inspection. The spraying process route applicable to the invention is as follows: cleaning, protecting, sand blowing, spraying, cleaning after coating and inspecting.
In the invention, 300 pieces of X-stage turbine working blades of a certain aircraft are processed, the protection effect is good, the post-treatment is simple, the production process is stable, and the spraying size consistency is good. Use original spraying anchor clamps, need to wrap up the sticky tape before the blowing sand and protect, avoid the blowing sand to destroy the region beyond the spraying face. Meanwhile, after sand blowing, the area of the blade crown outside the surface to be sprayed needs to be protected by using the adhesive tape again, and the adhesive tape is adhered to at least two layers, so that the adhesive tape is prevented from being burnt through during spraying, and the coating is adhered to the area outside the spraying surface. The spraying protection clamp designed by the invention does not need to be pasted with an adhesive tape, and sand blowing and spraying can share one clamp, so that the workload before and after spraying is greatly reduced, the cost is favorably reduced, the production efficiency is improved, and the spraying quality is ensured.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A turbine blade (10) to be processed comprises a blade shroud (11) and a blade body (12) which are arranged along the span direction of the turbine blade, the blade shroud (11) is arranged at the first end of the blade body (12), and the included angle between the blade shroud (11) which is obliquely arranged along the chord direction of the turbine blade and the horizontal plane is alpha degrees,
the blade crown spraying protection clamp for the turbine blade comprises a frame (21), and a first clamping mechanism (22) and a second clamping mechanism (23) which are arranged on the outer wall surface of the frame (21), wherein the first clamping mechanism (22) and the second clamping mechanism (23) are oppositely arranged along the height direction of the frame (21) so as to clamp the turbine blade (10) to be processed which is vertically arranged under the combined action and fix the turbine blade (10) to be processed along the height direction of the frame (21),
the first clamping mechanism (22) is used for abutting against the upper surface of the blade crown (11) and protecting the upper surface of the blade crown (11) during spraying operation, a positioning groove (2311) which is obliquely arranged relative to the frame (21) in the horizontal direction is concavely arranged on the upper surface of the second clamping mechanism (23), the second end of the blade body (12) is obliquely arranged in the positioning groove (2311) along the direction matched with the positioning groove (2311) and abuts against the bottom surface of the positioning groove (2311), and the first clamping mechanism (22) and the second clamping mechanism (23) clamp and fix the turbine blade (10) to be machined together so that the blade crown (11) is arranged in the horizontal direction.
2. The shroud spray shield fixture of a turbine blade of claim 1,
the outer wall surface of the frame (21) is inwards sunk to form a containing groove (211),
the second clamping mechanism (23) comprises a positioning support plate (231) and a jacking portion, the positioning support plate (231) and the first clamping mechanism (22) are arranged oppositely, the jacking portion is arranged on the lower side of the positioning support plate (231), a positioning groove (2311) which is obliquely arranged relative to the frame (21) in the horizontal direction is concavely arranged on the upper surface of the positioning support plate (231), the second end of the blade body (12) is obliquely arranged in the positioning groove (2311) along the direction matched with the positioning groove (2311) and is abutted to the bottom surface of the positioning groove (2311),
the positioning support plate (231) is movably arranged in the height direction of the frame (21), the jacking portion is abutted to the lower surface of the positioning support plate (231), and the positioning support plate (231) is driven to slide in the height direction of the frame (21) through the jacking portion so that the positioning support plate (231) and the first clamping mechanism (22) jointly clamp and fix the turbine blade (10) to be machined.
3. The shroud spray shield fixture of a turbine blade of claim 2,
the first clamping mechanism (22) comprises a clamping baffle (221) arranged corresponding to the positioning groove (2311),
the clamping baffle (221) is made of Teflon materials, a pressing groove used for pressing the blade crown (11) is formed in the lower surface of the clamping baffle (221), and the bottom of the pressing groove is arranged in the horizontal direction.
4. The shroud spray shield fixture of turbine blades as claimed in claim 3,
the bottom surface of the positioning groove (2311) is provided with a flexible layer.
5. The shroud spray shield fixture of turbine blades as claimed in claim 3,
the positioning support plate (231) is a wedge-shaped plate, the lower surface of the positioning support plate (231) is obliquely arranged relative to the frame (21) in the horizontal direction, the jacking part comprises a jacking plate (232) which is arranged in the accommodating groove (211) and is correspondingly arranged with the positioning support plate (231),
the upper surface of the jacking plate (232) is obliquely arranged relative to the frame (21) in the horizontal direction, the lower surface of the jacking plate (232) is abutted against the groove bottom of the accommodating groove (211), and the upper surface of the jacking plate (232) is in inclined plane fit with the positioning support plate (231) to support and position the positioning support plate (231).
6. The shroud spray shield fixture of turbine blades as claimed in claim 5,
the length dimension of the jacking plate (232) is smaller than the groove diameter of the accommodating groove (211) so that the jacking plate (232) can be slidably arranged in the accommodating groove (211) along the horizontal direction, and the jacking plate (232) slides along the horizontal direction and is matched with the inclined surface of the positioning support plate (231) through the jacking plate (232) so as to drive the positioning support plate (231) to move along the height direction of the frame (21).
7. The shroud spray shield fixture of turbine blades as claimed in claim 6,
the bottom of the lateral wall of the both sides of frame (21) be equipped with respectively with hold application of force dodge hole (212) of recess (211) intercommunication, through hole (212) application of force is dodged in the application of force and the drive jacking board (232) slide along the horizontal direction.
8. The shroud spray shield fixture of turbine blades as claimed in claim 3,
the outer wall surface of the positioning support plate (231) protrudes out of the outer wall surface of the clamping baffle plate (221) to enable the outer wall surface of the blade shroud (11) to protrude out of the outer wall surface of the clamping baffle plate (221) after the turbine blade (10) to be machined is clamped and fixed.
9. The shroud spray shield fixture of turbine blades as claimed in claim 3,
the blade crown spraying protection clamp for the turbine blade further comprises a panel (24) arranged on the frame (21) and used for covering the accommodating groove (211), the blade body (12) of the turbine blade (10) to be processed is protected during spraying operation through the panel (24), and a sealing strip (25) is arranged between the panel (24) and the clamping baffle (221).
10. A shroud spraying method for a turbine blade using the shroud spraying protection jig for a turbine blade according to any one of claims 1 to 9, comprising the steps of:
the method comprises the steps that a blade body (12) of a turbine blade (10) to be machined is obliquely arranged in a positioning groove (2311) of a second clamping mechanism (23), and the turbine blade (10) to be machined is clamped and positioned between a first clamping mechanism (22) and the second clamping mechanism (23), so that a blade crown (11) of the turbine blade (10) to be machined is arranged along the horizontal direction;
and carrying out spraying operation on the outer wall surface of the blade crown (11) of the turbine blade (10) to be processed.
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| CN202010612912.XA CN111957464B (en) | 2020-06-30 | 2020-06-30 | Blade shroud spraying protection clamp and method for turbine blade |
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| CN202010612912.XA CN111957464B (en) | 2020-06-30 | 2020-06-30 | Blade shroud spraying protection clamp and method for turbine blade |
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| CN111957464A true CN111957464A (en) | 2020-11-20 |
| CN111957464B CN111957464B (en) | 2021-11-30 |
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| CN113020900A (en) * | 2021-01-11 | 2021-06-25 | 重庆江增船舶重工有限公司 | Method for machining turbine blade of axial flow supercharger |
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