CN116000565A - Preparation method of zigzag blade crown turbine blade protection clamp and protection clamp thereof - Google Patents
Preparation method of zigzag blade crown turbine blade protection clamp and protection clamp thereof Download PDFInfo
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- CN116000565A CN116000565A CN202211572723.XA CN202211572723A CN116000565A CN 116000565 A CN116000565 A CN 116000565A CN 202211572723 A CN202211572723 A CN 202211572723A CN 116000565 A CN116000565 A CN 116000565A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a preparation method of a sawtooth-shaped blade crown turbine blade protective clamp, which comprises the following steps: s1, processing a parallelepiped clamp substrate according to the contour dimension of a blade crown of a turbine blade and the preset wall thickness when the clamp clamps the turbine blade; s2, dividing the clamp base body into a clamping end part and an assembling end part along the vertical direction according to the outline size of the blade shroud of the turbine blade, and processing an assembling hole on the assembling end part along the horizontal direction of the assembling end part; s3, dividing the clamp base body into a first clamp body, a second clamp body and a third clamp body along the axial direction of the assembly hole according to the outline size of the serrated edge of the blade crown of the turbine blade, and disassembling and assembling the first clamp body, the second clamp body and the third clamp body through the assembly hole and the screw; s4, machining the clamping end part on the second clamp body according to the outline size of the blade shroud of the turbine blade, so that grooves for clamping and protecting the blade shroud of the turbine blade are formed after the first clamp body, the second clamp body and the third clamp body are assembled.
Description
Technical Field
The invention relates to the technical field of aero-engine turbine blade processing protection, in particular to a preparation method of a zigzag blade crown turbine blade protection clamp. In addition, the invention also relates to the sawtooth-shaped blade crown turbine blade protective clamp prepared by the preparation method of the sawtooth-shaped blade crown turbine blade protective clamp.
Background
The turbine blade is an important part on power machines such as an aeroengine, a steam turbine, a gas turbine and the like, but the turbine blade not only needs to work under the surrounding of high-temperature fuel gas and bear centrifugal force, aerodynamic force, thermal stress and vibration load when the rotor rotates at high speed, but also is easy to corrode under the action of the hot fuel gas, and is the part with the worst working environment in the aeroengine. The turbine blade can be divided into a blade crown-free turbine blade, a parallelogram blade crown turbine blade and a zigzag blade crown turbine blade according to the structural characteristics of the blade crowns, the turbine blade in an advanced engine usually adopts the blade crown structure so as to improve the turbine efficiency and solve the vibration problem, and particularly the turbine blade with the zigzag blade crowns has better vibration reduction effect than the parallelogram blade crown turbine blade and is a common turbine blade structure of a plurality of advanced engines.
In addition, in order to improve the high-temperature gas corrosion resistance and high-temperature oxidation resistance of the turbine blade, a high-temperature gas corrosion resistance coating or a high-temperature oxidation resistance protective coating is coated on the surface of the blade by adopting technologies such as spraying, physical vapor deposition and the like. In the process of preparing the coating, the tenon and the blade crown of the blade are required to be protected so as to prevent the coating from being coated on the surface of the blade, further the weight of the blade is reduced, the assembly precision of the blade is prevented from being influenced, and before the coating is carried out on the blade, a sand blasting pretreatment process is generally required to be adopted so as to remove an oxide film on the surface of the blade or increase the surface roughness of the blade, further the bonding strength of the coating and a matrix is improved, and in order to meet the assembly precision requirement of parts, the blade crown and the tenon of the blade are also required to be protected by sand blasting during sand blasting.
However, the profile of the blade crown and the tenon part of the zigzag blade crown turbine blade is irregular, the bending deformation is large, particularly the blade crown part has high dimensional precision, the requirements on the protection precision of sand blowing protection and coating are also high, and the protection process difficulty is far greater than that of the tenon part. In order to meet the quality requirements of the zigzag shrouded turbine blade, the blade is usually processed by adopting the following two methods in the sand blowing and coating processes: 1. adopting a heat insulation adhesive tape for protection; 2. and removing the coating on the tip shroud part after the coating is coated. However, the first method has the following disadvantages: 1. the cost is high, the price of the heat-resistant adhesive tape is relatively high, the sand blowing and the coating plating are needed, but the heat-resistant adhesive tape belongs to a consumable product which cannot be reused, and the production cost is too high due to mass use; 2. the protection efficiency is low, because the shape of the blade crown of the zigzag blade crown turbine blade is irregular, the bending deformation is large, the blade crown is connected with the runner surface of the upper edge plate of the blade, when the heat insulation adhesive tape is used for protection, the blade crown part is required to be comprehensively protected, the runner surface part of the upper edge plate cannot be shielded, so that the protection difficulty is great, the protection time is long, the protection 1 blade with the structure at least needs to take about 30 minutes, when the heat-resistant adhesive tape is used for protection, the adhesive tape is required to be completely removed after sand blowing and coating, the operation is complex and time-consuming, and if the cleaning is careless and not thorough, the residual of the protection adhesive tape is possibly generated, and becomes the redundant object on the surface of the blade, so that the quality requirement cannot be met; 3. the protection reliability is low, and the runner face of leaf cap and blade upper edge plate closely links to each other, when using thermal-insulated sticky tape protection, causes the shielding of upper edge plate runner face portion easily, influences the integrality of coating position, and in addition, the heat-resisting sticky tape will receive the effect of power or high temperature in blowing sand and coating process, and the sticky tape is easy damaged, causes the phenomenon that leaf cap or tenon position blown sand or has the coating to leak to plate, therefore secretly the reliability of protection is low, leads to the processingquality of part and the uniformity of processing poor. The second method described above has the following disadvantages: the production efficiency is low, the quality cannot be ensured, and the zigzag blade crown has large bending deformation and high dimensional accuracy due to the shape and the size of the zigzag blade crown and the irregularity thereof, so that the difficulty of reprocessing after coating is very large, the time consumption is long, and the processing qualification rate is low. However, if the coating is not processed after being coated, the coating still remains, so that the coating at the blade crown part not only increases the weight of the blade and the load of the tenon tooth and the wheel disc, influences the service performance of the turbine rotor, but also increases the size of the blade crown part, influences the assembly clearance, causes the abrasion of the blade crown, and influences the performance of the engine.
Disclosure of Invention
The invention provides a preparation method of a protection clamp for a zigzag-shaped blade crown turbine blade and the protection clamp thereof, which are used for solving the technical problems that the protection cost is high, the efficiency is low and the processing quality cannot be ensured when the blade crown part of the existing zigzag-shaped blade crown turbine blade is subjected to sand blowing and coating.
According to one aspect of the invention, there is provided a method of manufacturing a serrated tip shroud turbine blade protective jig comprising the steps of: s1, processing a parallelepiped clamp substrate according to the contour dimension of a blade crown of a turbine blade and the preset wall thickness when the clamp clamps the turbine blade; s2, dividing the clamp base body into a clamping end part and an assembling end part along the vertical direction according to the outline size of the blade shroud of the turbine blade, and processing an assembling hole on the assembling end part along the horizontal direction of the assembling end part; s3, dividing the clamp base body into a first clamp body, a second clamp body and a third clamp body along the axial direction of the assembly hole according to the outline size of the serrated edge of the blade crown of the turbine blade, and disassembling and assembling the first clamp body, the second clamp body and the third clamp body through the assembly hole and the screw; s4, machining the clamping end part on the second clamp body according to the outline size of the blade shroud of the turbine blade, so that grooves for clamping and protecting the blade shroud of the turbine blade are formed after the first clamp body, the second clamp body and the third clamp body are assembled.
As a further improvement of the above technical scheme:
further, before step S1, the method further includes the steps of: the profile of the turbine blade is obtained by profiling the turbine blade to obtain the profile of the shroud of the turbine blade, the profile of the flow path surface at the shroud, the profile of the serrated edge of the shroud and the profile of the right-angled edge of the shroud.
Further, the step of dividing the jig base vertically into a clamping end portion and a fitting end portion further includes the steps of: and processing the upper end surface of the clamping end part according to the contour dimension of the flow passage surface at the blade crown of the turbine blade so that the contour of the upper end surface of the clamping end part is the same as the contour of the flow passage surface at the blade crown of the turbine blade.
Further, the step S4 further includes the steps of: according to the outline dimension of the right-angle edge of the blade shroud of the turbine blade, a positioning step for positioning the blade shroud of the turbine blade is processed on the side wall body of the groove.
Further, the preset wall thickness is 3mm-5mm.
Further, a preset gap is kept between the groove and the tip of the clamped turbine blade, and the preset gap is 1mm-3mm.
According to another aspect of the present invention, there is further provided a serrated tip shroud turbine blade protection clamp, which is manufactured by adopting the manufacturing method of the serrated tip shroud turbine blade protection clamp, and the protection clamp includes a first clamp body, a second clamp body and a third clamp body, wherein the first clamp body, the second clamp body and the third clamp body enclose a groove for clamping and protecting a tip shroud of a turbine blade, the first clamp body and the second clamp body are detachably connected, and the second clamp body and the third clamp body are detachably connected.
As a further improvement of the above technical scheme:
further, the protective clamp further comprises an assembly hole penetrating through the first clamp body, the second clamp body and the third clamp body and avoiding the groove, a first screw in threaded connection with the assembly hole and used for connecting the first clamp body and the second clamp body, and a second screw in threaded connection with the assembly hole and used for connecting the second clamp body and the third clamp body.
Further, a positioning step which is used for being distributed corresponding to the blade crown right-angle edge of the turbine blade is concavely arranged on the upper end face of the second clamp body.
Further, the shape of the end face of the first clamp body facing the second clamp body is used for being distributed corresponding to the shape of the serrated edge of the blade shroud of the turbine blade; and/or the shape of the end face of the third clamp body facing the second clamp body is used for being distributed corresponding to the shape of the serrated edge of the shroud of the turbine blade.
The invention has the following beneficial effects:
according to the preparation method of the sawtooth-shaped blade crown turbine blade protective clamp, firstly, the parallelepiped clamp base body is processed according to the profile size of the blade crown of the turbine blade and the preset wall thickness when the clamp clamps the turbine blade, so that the clamp base body is ensured to have enough processing allowance for processing, and the parallelepiped clamp base body is low in shape rule processing difficulty; dividing the clamp base into a clamping end part and an assembling end part along the vertical direction according to the outline size of the blade crown of the turbine blade, machining an assembling hole on the assembling end part along the horizontal direction of the assembling end part, so that the clamping end part of the clamp base has enough machining allowance, the machining of the assembling hole does not influence the further machining of the clamping end part, the subsequent further machining is fully prepared, then the clamp base is divided into a first clamp body, a second clamp body and a third clamp body along the axial direction of the assembling hole according to the outline size of the blade crown zigzag edge of the turbine blade, the first clamp body, the second clamp body and the third clamp body can be disassembled through the assembling hole and a screw, the disassembly is convenient, and the first clamp body, the second clamp body and the third clamp body are compact in structure after being assembled due to the fact that the assembling hole is machined before the disassembly, the machining difficulty is reduced and the assembly precision is provided through the blocking machining, the first clamp body, the second clamp body and the third clamp body are divided based on the outline dimension of the serrated edge of the blade crown of the turbine blade, so that when the blade crown of the turbine blade is clamped and protected, the surface surfaces are completely contacted and attached, the protection performance is good, finally, the clamping end part on the second clamp body is machined according to the outline dimension of the blade crown of the turbine blade, so that the first clamp body, the second clamp body and the third clamp body are assembled to form a groove for clamping and protecting the blade crown of the turbine blade, the first clamp body, the second clamp body and the third clamp body are used for clamping and fixing the turbine blade, the blade crown of the turbine blade is accommodated in the groove, the protection of the blade crown of the turbine blade is realized, compared with the prior art, the protection clamp is convenient to clamp, and can be repeatedly used, the protection efficiency and the protection cost are low, and the machining difficulty of the protective clamp is reduced by adopting a blocking machining mode, the assembly precision of the protective clamp is improved, the protection is reliable, the machining quality of the shroud of the turbine blade after protection is ensured, the practicability is high, and the protective clamp is suitable for wide popularization and application.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic illustration of a prior art zigzag tip shroud turbine blade;
FIG. 2 is an outflow block diagram of a method of making a serrated tip shroud turbine blade protective jig in accordance with a preferred embodiment of the invention.
FIG. 3 is a schematic view of a serrated tip shroud turbine blade retention clip embodying the present invention for clamping a serrated tip shroud turbine blade;
FIG. 4 is a schematic illustration of the structure of a second clamp body clamping a serrated tip shroud turbine blade in a serrated tip shroud turbine blade protective clamp in accordance with a preferred embodiment of the present invention.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawing figures, but the invention can be practiced in a number of different ways, as defined and covered below.
FIG. 1 is a schematic illustration of a prior art zigzag tip shroud turbine blade; FIG. 2 is an outflow block diagram of a method of making a serrated tip shroud turbine blade protective jig in accordance with a preferred embodiment of the invention. FIG. 3 is a schematic view of a serrated tip shroud turbine blade retention clip embodying the present invention for clamping a serrated tip shroud turbine blade; FIG. 4 is a schematic illustration of the structure of a second clamp body clamping a serrated tip shroud turbine blade in a serrated tip shroud turbine blade protective clamp in accordance with a preferred embodiment of the present invention.
As shown in fig. 1 to 4, the preparation method of the serrated shroud turbine blade protective clamp of the embodiment comprises the following steps: s1, processing a parallelepiped clamp substrate according to the contour dimension of a blade crown of a turbine blade and the preset wall thickness when the clamp clamps the turbine blade; s2, dividing the clamp base body into a clamping end part and an assembling end part along the vertical direction according to the outline size of the blade shroud of the turbine blade, and processing an assembling hole on the assembling end part along the horizontal direction of the assembling end part; s3, dividing the clamp base body into a first clamp body, a second clamp body and a third clamp body along the axial direction of the assembly hole according to the outline size of the serrated edge of the blade crown of the turbine blade, and disassembling and assembling the first clamp body, the second clamp body and the third clamp body through the assembly hole and the screw; s4, machining the clamping end part on the second clamp body according to the outline size of the blade shroud of the turbine blade, so that grooves for clamping and protecting the blade shroud of the turbine blade are formed after the first clamp body, the second clamp body and the third clamp body are assembled. According to the preparation method of the sawtooth-shaped blade crown turbine blade protective clamp, firstly, a parallelepiped clamp base body is processed according to the profile size of the blade crown of the turbine blade and the preset wall thickness when the clamp clamps the turbine blade, so that the clamp base body has enough processing allowance for processing, and the parallelepiped clamp base body is low in shape rule processing difficulty; dividing the clamp base into a clamping end part and an assembling end part along the vertical direction according to the outline size of the blade crown of the turbine blade, machining an assembling hole on the assembling end part along the horizontal direction of the assembling end part, so that the clamping end part of the clamp base has enough machining allowance, the machining of the assembling hole does not influence the further machining of the clamping end part, the subsequent further machining is fully prepared, then the clamp base is divided into a first clamp body, a second clamp body and a third clamp body along the axial direction of the assembling hole according to the outline size of the blade crown zigzag edge of the turbine blade, the first clamp body, the second clamp body and the third clamp body can be disassembled through the assembling hole and a screw, the disassembly is convenient, and the first clamp body, the second clamp body and the third clamp body are compact in structure after being assembled due to the fact that the assembling hole is machined before the disassembly, the machining difficulty is reduced and the assembly precision is provided through the blocking machining, the first clamp body, the second clamp body and the third clamp body are divided based on the outline dimension of the serrated edge of the blade crown of the turbine blade, so that when the blade crown of the turbine blade is clamped and protected, the surface surfaces are completely contacted and attached, the protection performance is good, finally, the clamping end part on the second clamp body is machined according to the outline dimension of the blade crown of the turbine blade, so that the first clamp body, the second clamp body and the third clamp body are assembled to form a groove for clamping and protecting the blade crown of the turbine blade, the first clamp body, the second clamp body and the third clamp body are used for clamping and fixing the turbine blade, the blade crown of the turbine blade is accommodated in the groove, the protection of the blade crown of the turbine blade is realized, compared with the prior art, the protection clamp is convenient to clamp, and can be repeatedly used, the protection efficiency and the protection cost are low, and the machining difficulty of the protective clamp is reduced by adopting a blocking machining mode, the assembly precision of the protective clamp is improved, the protection is reliable, the machining quality of the shroud of the turbine blade after protection is ensured, the practicability is high, and the protective clamp is suitable for wide popularization and application. It is understood that the protective clamp of the application is processed by dividing into the first clamp body, the second clamp body and the third clamp body, so that end surfaces of the first clamp body, the second clamp body and the third clamp body, which clamp the blade shroud of the turbine blade, are not connected with each other, and further processing difficulty is greatly reduced. It should be appreciated that the shroud of the turbine blade has two serrated edges, thus dividing the clamp base into three portions, a first clamp body, a second clamp body and a third clamp body, to clamp the serrated edges in a face-to-face close fit.
In this embodiment, before step S1, the method further includes the steps of: the profile of the turbine blade is obtained by profiling the turbine blade to obtain the profile of the shroud of the turbine blade, the profile of the flow path surface at the shroud, the profile of the serrated edge of the shroud and the profile of the right-angled edge of the shroud. Specifically, profiling treatment is carried out on the turbine blade so as to ensure the accuracy and reliability of the contour dimension of the blade crown of the turbine blade, the contour dimension of the flow path surface at the blade crown, the contour dimension of the saw-tooth edge of the blade crown and the contour dimension of the right-angle edge of the blade crown, further ensure the clamping reliability of the protection clamp and improve the protection reliability of the protection clamp. Alternatively, in other embodiments, the shroud profile of the turbine blade, the profile of the flow path face at the shroud, the profile of the shroud zigzag edge, and the profile of the shroud rectangular edge are obtained in the design tooling dimensions of the turbine blade.
In this embodiment, the step of dividing the jig base vertically into a clamping end portion and an assembling end portion further includes the steps of: and processing the upper end surface of the clamping end part according to the contour dimension of the flow passage surface at the blade crown of the turbine blade so that the contour of the upper end surface of the clamping end part is the same as the contour of the flow passage surface at the blade crown of the turbine blade. Specifically, the upper end surface profile of the clamping end part is the same as the profile of the runner surface at the blade crown of the turbine blade, so that after the turbine blade is clamped by the protective clamp, the upper end surface of the clamping end surface of the protective clamp and the runner surface at the blade crown of the turbine blade are located in the same curved end surface as much as possible, the clamping gap between the upper end surface of the clamping end surface of the protective clamp and the runner surface at the blade crown of the turbine blade is reduced to the greatest extent, and the protective performance of the protective clamp is improved.
In this embodiment, step S4 further includes the steps of: according to the outline dimension of the right-angle edge of the blade shroud of the turbine blade, a positioning step for positioning the blade shroud of the turbine blade is processed on the side wall body of the groove. Specifically, the positioning steps are used for positioning the right-angle edges of the blade crowns of the turbine blades, so that the positioning of the blade crowns of the turbine blades is realized, and the assembly precision is improved. It should be appreciated that the shroud of the turbine blade has two right angle edges and the locating steps are correspondingly machined.
In this embodiment, the preset wall thickness is 3mm-5mm. It should be understood that the preset wall thickness refers to a wall thickness of the groove formed by surrounding the first, second and third clamp bodies. Specifically, when the preset wall thickness is between 3mm and 5mm, the rigidity of the first clamp body, the rigidity of the second clamp body and the rigidity of the third clamp body are reliable, the clamping deformation is not easy, and the materials manufactured by processing the first clamp body, the second clamp body and the third clamp body are proper and the cost performance is high; when the preset wall thickness is smaller than 3mm, the rigidity of the first clamp body, the rigidity of the second clamp body and the rigidity of the third clamp body are deficient, and the first clamp body, the second clamp body and the third clamp body are easy to clamp and deform to influence the assembly precision; when the preset wall thickness is larger than 5mm, the first clamp body, the second clamp body and the third clamp body are made of more materials, the cost performance is low, the self weight of the first clamp body, the second clamp body and the third clamp body is large, and the use is relatively inconvenient.
In the embodiment, a preset gap is kept between the groove and the tip of the clamped turbine blade, and the preset gap is 1mm-3mm. Specifically, when the preset gap is between 1mm and 3mm, the turbine blade is heated and expanded in the machining process and cannot be extruded and deformed with the protective clamp, and the protective clamp is made of proper materials, so that the cost performance is high; when the preset gap is smaller than 1mm, the turbine blade is easy to squeeze and deform with the protective clamp after being heated and expanded in the turbine blade machining engineering; when the preset gap is larger than 3mm, the protective clamp is made of more materials, the cost performance is low, the weight of the protective clamp is large, and the use is relatively inconvenient. It should be appreciated that when the turbine blade is coated, both the turbine blade and the protective jig are subjected to high temperatures of 200-600 c and expand with heat.
The serrated tip shroud turbine blade protective clamp of the embodiment is prepared by adopting the preparation method of the serrated tip shroud turbine blade protective clamp in any embodiment, and comprises a first clamp body, a second clamp body and a third clamp body, wherein the first clamp body, the second clamp body and the third clamp body are enclosed to form a groove for clamping and protecting the tip shroud of the turbine blade, the first clamp body and the second clamp body are detachably connected, and the second clamp body and the third clamp body are detachably connected. Specifically, first anchor clamps body and second anchor clamps body are assembled earlier to assemble turbine blade's leaf crown to the recess in, reload second anchor clamps body and third anchor clamps body, realize the clamping fixed and the protection to turbine blade's leaf crown, dismouting convenient to use effectively improves production effect, guarantee processingquality. It is understood that through the use of the protective clamp, the requirements of sand blowing protection and coating protection on the blade crown part of the zigzag blade crown turbine blade can be met, meanwhile, a protective adhesive tape is not required to be pasted, the sand blowing and the coating can share one set of clamp, the workload of operators before and after the coating is obviously reduced, the cost is reduced, the production efficiency is improved, and the processing quality is guaranteed.
In this embodiment, the protective clamp further includes an assembly hole penetrating through the first clamp body, the second clamp body and the third clamp body and avoiding the groove, a first screw in threaded connection with the assembly hole for connecting the first clamp body and the second clamp body, and a second screw in threaded connection with the assembly hole for connecting the second clamp body and the third clamp body. Specifically, the first screw is respectively in threaded connection with the assembly holes on the first clamp body and the second clamp body so as to realize the assembly of the first clamp body and the second clamp body; and the second screw is respectively in threaded connection with the assembly holes on the second clamp body and the third clamp body so as to realize the assembly of the second clamp body and the third clamp body.
In this embodiment, a positioning step is concavely arranged on the upper end surface of the second fixture body, and the positioning step is correspondingly arranged on the right-angle edge of the blade crown of the turbine blade. Specifically, the positioning step is used for realizing the positioning of the right-angle edge of the blade crown of the turbine blade, and then the blade crown of the turbine blade is indirectly positioned, so that the positioning precision is improved, and the reliability after clamping and positioning is ensured.
In this embodiment, the shape of the end face of the first fixture body facing the second fixture body is used to be arranged corresponding to the shape of the tip shroud zigzag edge of the turbine blade. Specifically, the first clamp body is attached to the end face of the second clamp body to fix the sawtooth-shaped edge of the blade crown of the turbine blade, and the first clamp body and the second clamp body are tightly attached to each other, so that the assembly precision is high.
In this embodiment, the shape of the end face of the third clamp body facing the second clamp body is used to be arranged corresponding to the shape of the tip shroud zigzag edge of the turbine blade. Specifically, the third clamp body is attached to the end face of the second clamp body to fix the sawtooth-shaped edge of the blade crown of the turbine blade, and the third clamp body and the blade crown are tightly attached to each other, so that the assembly precision is high.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The preparation method of the zigzag blade shroud turbine blade protective clamp is characterized by comprising the following steps of:
s1, processing a parallelepiped clamp substrate according to the contour dimension of a blade crown of a turbine blade and the preset wall thickness when the clamp clamps the turbine blade;
s2, dividing the clamp base body into a clamping end part and an assembling end part along the vertical direction according to the outline size of the blade shroud of the turbine blade, and processing an assembling hole on the assembling end part along the horizontal direction of the assembling end part;
s3, dividing the clamp base body into a first clamp body, a second clamp body and a third clamp body along the axial direction of the assembly hole according to the outline size of the serrated edge of the blade crown of the turbine blade, and disassembling and assembling the first clamp body, the second clamp body and the third clamp body through the assembly hole and the screw;
s4, machining the clamping end part on the second clamp body according to the outline size of the blade shroud of the turbine blade, so that grooves for clamping and protecting the blade shroud of the turbine blade are formed after the first clamp body, the second clamp body and the third clamp body are assembled.
2. The method of preparing a serrated tip shroud turbine blade protective jig as claimed in claim 1, further comprising the step of, prior to step S1:
the profile of the turbine blade is obtained by profiling the turbine blade to obtain the profile of the shroud of the turbine blade, the profile of the flow path surface at the shroud, the profile of the serrated edge of the shroud and the profile of the right-angled edge of the shroud.
3. The method of manufacturing a serrated tip shroud turbine blade protective jig as claimed in claim 2 wherein the step of dividing the jig base vertically into a clamping end portion and a fitting end portion further comprises the steps of:
and processing the upper end surface of the clamping end part according to the contour dimension of the flow passage surface at the blade crown of the turbine blade so that the contour of the upper end surface of the clamping end part is the same as the contour of the flow passage surface at the blade crown of the turbine blade.
4. The method of manufacturing a serrated tip shroud turbine blade protective jig as claimed in claim 2, further comprising the step of, after step S4:
according to the outline dimension of the right-angle edge of the blade shroud of the turbine blade, a positioning step for positioning the blade shroud of the turbine blade is processed on the side wall body of the groove.
5. The method of manufacturing a serrated tip shroud turbine blade protective jig as claimed in any one of claims 1 to 4, wherein the predetermined wall thickness is 3mm to 5mm.
6. The method of manufacturing a serrated tip shroud turbine blade protective jig as claimed in any one of claims 1 to 4, wherein a predetermined gap is maintained between the recess and the tip shroud tip of the tip shroud of the clamped turbine blade, the predetermined gap being 1mm to 3mm.
7. The zigzag-shaped blade shroud turbine blade protective clamp is characterized by being prepared by adopting the preparation method of the zigzag-shaped blade shroud turbine blade protective clamp according to any one of claims 1 to 6, and comprises a first clamp body, a second clamp body and a third clamp body, wherein the first clamp body, the second clamp body and the third clamp body are enclosed to form a groove for clamping and protecting a blade shroud of a turbine blade, the first clamp body and the second clamp body are detachably connected, and the second clamp body and the third clamp body are detachably connected.
8. The serrated tip shroud turbine blade protective jig of claim 7 further comprising a mounting hole passing through the first, second and third jig bodies and avoiding the recess, a first screw threaded with the mounting hole for connecting the first and second jig bodies, and a second screw threaded with the mounting hole for connecting the second and third jig bodies.
9. The serrated tip shroud turbine blade protective jig as claimed in claim 8, wherein the upper end face of the second jig body is concavely provided with a positioning step for arrangement corresponding to the tip shroud right angle side of the turbine blade.
10. The serrated tip shroud turbine blade protective clamp of claim 8, wherein the shape of the end face of the first clamp body facing the second clamp body is configured to correspond to the shape of the tip shroud serrated edge of the turbine blade; and/or
The shape of the end face of the third clamp body facing the second clamp body is used for being distributed corresponding to the shape of the blade shroud sawtooth edge of the turbine blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211572723.XA CN116000565A (en) | 2022-12-08 | 2022-12-08 | Preparation method of zigzag blade crown turbine blade protection clamp and protection clamp thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211572723.XA CN116000565A (en) | 2022-12-08 | 2022-12-08 | Preparation method of zigzag blade crown turbine blade protection clamp and protection clamp thereof |
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| CN116000565A true CN116000565A (en) | 2023-04-25 |
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| CN202211572723.XA Pending CN116000565A (en) | 2022-12-08 | 2022-12-08 | Preparation method of zigzag blade crown turbine blade protection clamp and protection clamp thereof |
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| Country | Link |
|---|---|
| CN (1) | CN116000565A (en) |
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2022
- 2022-12-08 CN CN202211572723.XA patent/CN116000565A/en active Pending
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