Method for determining variable amount of hollow guide vane airfoil profile and method for generating profile

Abstract

The application discloses a hollow guide vane blade profile variable allowance determination method and a profile generation method, relates to the technical field of precision device processing, and comprises the following steps: obtaining a plurality of profile data, each profile data comprising height values of a plurality of positions of the hollow guide vane in a directional solidification process; determining a deformation position of the hollow guide vane according to the plurality of profile data, wherein the deformation position is a position of the hollow guide vane that deforms in the directional solidification process; for each deformation position, determining a variable allowance of the deformation position according to an average deformation amount corresponding to the deformation position and a height threshold value corresponding to the deformation position; the average deformation amount corresponding to the deformation position is determined according to the height values of the deformation position in the plurality of profile data, and the variable allowance represents a height value that needs to be compensated for the deformation position of the hollow guide vane in the directional solidification process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of precision device processing, and in particular to a method for determining variable allowance of a hollow guide vane blade profile and a method for generating a profile. BACKGROUND

[0002] An aero-engine is a highly complex and precise thermodynamic machine, which is not only the power of an airplane flight, but also an important driving force for promoting the development of the aviation industry, and the aero-engine reflects the overall industrial level of a country. Among them, the working environment of the aero-engine turbine blade is very harsh, and the performance requirement is very high, and the blade manufacturing technology is complex.

[0003] At present, the production of aero-engine turbine blades generally adopts high-temperature alloy precision casting process. In the production process, under high-temperature conditions, physical and chemical reactions such as oxidation and sand inclusion occur between the molten metal and the inner surface of the mold shell. Therefore, it is necessary to appropriately design the machining allowance of the product during the design stage of the product, according to the material characteristics of the product, the structural characteristics of the product and the processing requirements, and then to remove the surface allowance through surface treatment such as polishing, dry sand blasting and vibration polishing to obtain the final product that meets the design.

[0004] In the precision casting process of the aero-engine turbine blade, the problems presented in the casting process are different according to the material characteristics of the product, the structure of the product and the process method. For example, a certain aero-engine in China adopts a directional crystallization hollow blade, which is a large flat plate type thin-walled hollow structure with small profile curvature and large blade chord width (more than 80mm). The blade is prepared by using high-temperature refractory material such as white corundum. In the production process, the pouring temperature and holding temperature reach 1500℃, and the pouring time is as long as 55min. The mold shell deforms greatly due to long time in the super-high temperature environment, resulting in problems such as deformation bulging of the casting and pouring leakage. The large deformation of the casting will seriously affect the subsequent processing efficiency and product qualification rate. SUMMARY

[0005] The technical problem to be solved by the present application is that due to process requirements, the casting deformation is large, and the existing method cannot accurately predict the deformation of the casting, which leads to the inability to further process the casting deformation, thereby reducing the subsequent processing efficiency and product qualification rate. To solve this technical problem, the present application provides a method for determining variable allowance of a hollow guide vane blade profile and a method for generating a profile.

[0006] The technical solution of the present application to solve the above technical problem is as follows:

[0007] A method for determining variable allowance of a hollow guide vane blade profile, comprising:

[0008] Step S1, obtaining a plurality of profile data, each of the profile data comprising a height value of a plurality of positions of the hollow guide vane in a directional solidification process;

[0009] Step S2, determining a deformation position of the hollow guide vane according to the plurality of profile data, the deformation position being a position of the hollow guide vane that deforms in the directional solidification process;

[0010] Step S3, for each of the deformation positions, determining a deformation compensation amount of the deformation position according to an average deformation amount corresponding to the deformation position and a height threshold value corresponding to the deformation position, the average deformation amount corresponding to the deformation position being determined according to the height values of the deformation position in the plurality of profile data, and the deformation compensation amount representing a height value that needs to be compensated for the deformation position of the hollow guide vane in the directional solidification process.

[0011] The beneficial effects of the present application are: by accurately predicting the deformation position and the deformation compensation amount (i.e. deformation amount) of the hollow guide vane in the directional solidification process, it is convenient to design the deformation compensation amount of the deformation position in the subsequent mold design and manufacturing stage, so as to effectively control the product deformation amount, reduce the subsequent surface processing allowance, and improve the processing efficiency and product qualification rate.

[0012] On the basis of the above technical solution, the present application can also be improved as follows.

[0013] Further, in the step S1, the plurality of profile data is obtained, comprising:

[0014] For each of the hollow guide vanes, a height value of a corresponding position of each section of the hollow guide vane is obtained, and the height value corresponding to each section is taken as the corresponding measurement data of the hollow guide vane.

[0015] According to the respective measurement data of each of the hollow guide vanes, a plurality of profile data is obtained.

[0016] The beneficial effects of the above further scheme are: by measuring the height value of the corresponding position of each section of the hollow guide vane, a foundation is laid for subsequent determination of the height value that needs to be compensated for the corresponding deformation position of each section.

[0017] Further, in the step S2, the deformation position of the hollow guide vane is determined according to the plurality of profile data, comprising:

[0018] For each position of the hollow guide vane, the position is taken as a to-be-detected position.

[0019] For each of the to-be-detected positions, a height value of the to-be-detected position is obtained from each of the profile data, and an average deformation amount of the to-be-detected position is determined according to the plurality of height values of the to-be-detected position.

[0020] For each of the to-be-detected positions, whether the to-be-detected position is a deformed position is determined according to the corresponding average deformation amount of the to-be-detected position and a height threshold value corresponding to the to-be-detected position.

[0021] The beneficial effect of the above further scheme is that the range of the deformed area is determined according to the obtained profile data, which facilitates subsequent design of the deformed positions in the mold design and manufacturing stage.

[0022] Further, for each of the to-be-detected positions, the method further comprises:

[0023] According to the corresponding average deformation amount of the to-be-detected position and the height threshold value corresponding to the to-be-detected position, a blade profile deformation rule of the hollow guide vane in the directional solidification process is determined.

[0024] The blade profile deformation rule is that, in the directional solidification process of the hollow guide vane, the deformation amount of the leading edge and the middle part of the hollow guide vane is large, and the deformation amount of the trailing edge of the hollow guide vane is small or no deformation; the deformation of the leading edge of the hollow guide vane is shrinkage, and the deformation of the middle part of the hollow guide vane is bulging.

[0025] In the step S2, according to the plurality of profile data, the deformed positions of the hollow guide vane are determined, comprising:

[0026] According to the plurality of profile data, a blade profile deformation rule of the hollow guide vane in the directional solidification process is determined.

[0027] According to the blade profile deformation rule, the deformed positions of the hollow guide vane are determined.

[0028] The beneficial effect of the above further scheme is that, by determining the blade profile deformation rule of the hollow guide vane in the directional solidification process, the deformed positions of the hollow guide vane are further determined, which facilitates subsequent allowance design of the deformed positions in the mold design and manufacturing stage, effectively controls the product deformation amount, reduces subsequent surface processing allowance such as rework, and improves processing efficiency and product qualification rate.

[0029] To solve the technical problems in the prior art, the application further provides a hollow guide vane profile generation method, comprising:

[0030] For each profile line of the hollow guide vane, a plurality of profile data corresponding to the profile line are obtained, each of the profile data comprising a height value of a plurality of positions of the profile line of the hollow guide vane in the directional solidification process;

[0031] For each profile line, the plurality of profile data corresponding to the profile line are taken as profile surface data, and the method for determining the variable allowance of the profile surface of the hollow guide vane blade is executed as described above to determine the deformation position corresponding to the profile line and the variable allowance corresponding to each of the deformation positions;

[0032] For each profile line, the correction data of the profile line are determined according to the deformation position corresponding to the profile line and the variable allowance corresponding to each of the deformation positions, the correction data comprising a correction amount of each of the deformation positions corresponding to the profile line;

[0033] According to the correction data corresponding to each of the profile lines of the hollow guide vane, the profile surface of the hollow guide vane is reshaped to obtain the profile surface structure corresponding to the hollow guide vane.

[0034] The beneficial effects of the present application are: according to the deformation position and the variable allowance (i.e. the deformation amount) of the hollow guide vane in the directional solidification process, the profile surface structure of the hollow guide vane is adjusted, which facilitates the variable allowance design of the deformation position in the subsequent mold design and manufacturing stage, effectively controls the product deformation amount, reduces the subsequent surface processing allowance, and improves the processing efficiency and product qualification rate.

[0035] Further, the reshaping of the profile surface of the hollow guide vane according to the correction data corresponding to each of the profile lines of the hollow guide vane to obtain the profile surface structure corresponding to the hollow guide vane comprises:

[0036] For each profile line of the hollow guide vane, the coordinates of each of the deformation positions corresponding to the profile line are determined, the profile line is segmented according to the coordinates to obtain a plurality of curves corresponding to the profile line, for each curve, the curve is offset processed according to the correction amount of the deformation position corresponding to each of the two end points of the curve to obtain an offset curve, and each offset curve is smoothly connected to obtain a target profile line;

[0037] According to the plurality of target profile lines, the profile surface structure corresponding to the hollow guide vane is obtained.

[0038] The beneficial effects of the above further scheme are: by sequentially segmenting, offsetting and smoothing the profile line according to the coordinates of the deformation position to obtain the target profile line, the surface of the three-dimensional model generated according to the target profile line is smooth and natural, and the mold designed according to the three-dimensional model is convenient to manufacture and process.

[0039] Further, the air core guide vane profile is reshaped according to the corresponding correction data of each of the profile lines of the air core guide vane, to obtain a corresponding profile structure of the air core guide vane, comprising:

[0040] For each of the profile lines of the air core guide vane, the coordinates of each of the deformation positions corresponding to the profile line are determined, the profile line is segmented according to the coordinates, to obtain a plurality of curves corresponding to the profile line, for each of the curves, the deformation positions corresponding to the two end points of the curve are taken as target positions, the correction amount and coordinates of the two target positions are determined, according to the coordinates, one of the two target positions is determined as a reference point, and the profile line is rotated according to the correction amount corresponding to the reference point, to obtain a rotated curve, and the smooth connection of each of the rotated curves is obtained to obtain a target profile line.

[0041] According to the plurality of target profile lines, the profile structure corresponding to the air core guide vane is obtained.

[0042] The beneficial effects of the above further scheme are that the target profile line is obtained by sequentially segmenting, rotating and smoothing the profile line according to the coordinates of the deformation positions, the surface of the three-dimensional model generated according to the target profile line is smooth and natural, and the mold designed according to the three-dimensional model is easy to manufacture and process.

[0043] To solve the technical problems in the prior art, the application further provides a manufacturing method of a mold for an air core guide vane, comprising:

[0044] Modeling is performed according to the profile structure as described above, to obtain a mold.

[0045] The beneficial effects of the application are that the deformation problem of the castings formed by pouring is controlled by designing the profile line of the air core guide vane in the mold design stage, the efficiency of part processing is improved, and the qualified rate of castings is improved.

[0046] To solve the technical problems in the prior art, the application further provides a device for determining the variable amount of the air core guide vane blade profile, comprising:

[0047] A data acquisition module is configured to acquire a plurality of profile data, each of the profile data comprising a height value of a plurality of positions of the air core guide vane in a directional solidification process;

[0048] A deformation position determination module is configured to determine a deformation position of the air core guide vane according to a plurality of the profile data, the deformation position being a position of the air core guide vane that deforms in the directional solidification process;

[0049] A variable residual amount determining module is configured to determine a variable residual amount of each of the deformation positions according to an average deformation amount corresponding to the deformation position and a height threshold value corresponding to the deformation position. The average deformation amount corresponding to the deformation position is determined according to height values of the deformation position in the plurality of profile data. The variable residual amount represents a height value of the deformation position of the hollow guide vane that needs to be compensated in the directional solidification process.

[0050] To solve the technical problems in the prior art, the present application further provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the method for determining the variable residual amount of the hollow guide vane airfoil profile.

[0051] To solve the technical problems in the prior art, the present application further provides a computer readable storage medium, and the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the method for determining the variable residual amount of the hollow guide vane airfoil profile. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 A flowchart of the method for determining the variable residual amount of the hollow guide vane airfoil profile;

[0053] Figure 2 A schematic diagram of the hollow guide vane;

[0054] Figure 3 A Figure 2 A B-B sectional view of the hollow guide vane;

[0055] Figure 4 A schematic diagram of the hollow guide vane profile deformation;

[0056] Figure 5 A schematic diagram of determining the variable residual amount of a deformation position of the hollow guide vane;

[0057] Figure 6 A schematic diagram of the hollow guide vane profile biasing process;

[0058] Figure 7 A schematic diagram of the hollow guide vane profile rotation process. DETAILED DESCRIPTION

[0059] The principles and features of the present application are described below, and the examples are only used to explain the present application and not to limit the scope of the present application.

[0060] Embodiment One

[0061] As shown in FIGS. 1 to 3, the hollow guide vane has the characteristics of thick leading edge and thin trailing edge. In order to manufacture the vane, the directional solidification technology is usually used in the prior art. During pouring, the mold shell is deformed in the high temperature environment for a long time. During crystal pulling, the metal liquid is slowly solidified in sequence. The position above the solid-liquid interface is liquid, and the position below the solid-liquid interface is solid. Under the action of the gravity of the poured metal liquid, the deformation amount of the bottom of the casting is large, and the deformation amount of the top of the casting is small. Figure 2 Figure 3 In order to solve the problem that the large deformation amount of the casting will seriously affect the subsequent processing efficiency and product qualification rate, as shown in FIG. 4, the embodiment provides a method for determining the deformation allowance of a profile of a hollow guide vane blade, comprising the following steps.

[0062] In order to solve the problem that the large deformation amount of the casting will seriously affect the subsequent processing efficiency and product qualification rate, as shown in FIG. 4, the embodiment provides a method for determining the deformation allowance of a profile of a hollow guide vane blade, comprising the following steps. Figure 1

[0063] In step S1, a plurality of profile data are obtained. Each profile data comprises a height value of a plurality of positions of the hollow guide vane in the directional solidification process.

[0064] In step S2, a deformed position of the hollow guide vane is determined according to the plurality of profile data. The deformed position is a position of the hollow guide vane which is deformed in the directional solidification process.

[0065] In step S3, for each deformed position, a deformation allowance of the deformed position is determined according to an average deformation amount corresponding to the deformed position and a height threshold value corresponding to the deformed position. The average deformation amount corresponding to the deformed position is determined according to the height value of the deformed position in the plurality of profile data. The deformation allowance represents a height value which needs to be compensated for the deformed position of the hollow guide vane in the directional solidification process.

[0066] In step S1, the plurality of profile data are obtained, comprising the following steps.

[0067] For each hollow guide vane, a height value of a position corresponding to each section of the hollow guide vane is obtained. The height value corresponding to each section is taken as measurement data corresponding to the hollow guide vane.

[0068] The plurality of profile data are obtained according to the respective measurement data corresponding to each hollow guide vane.

[0069] ​​In this embodiment, the height values of different parts of the hollow guide vane at different cross sections can be obtained by special tooling, three-coordinate detection or non-contact detection, etc. The relevant data of different parts of each cross section (including cross section, part and height value of the part) are recorded after obtaining a plurality of profile data. For example, 3 to 5 hollow guide vanes produced in each furnace batch are collected, and the profile line leading edge, middle part and trailing edge of the I-V cross section of each collected hollow guide vane are measured and recorded. Figure 2 The profile line leading edge, middle part and trailing edge of the I-V cross section of each collected hollow guide vane are measured and recorded.

[0070] In the step S2, the deformed parts of the hollow guide vane are determined according to the plurality of profile data, which includes:

[0071] For each part of the hollow guide vane, the part is taken as a to-be-detected part.

[0072] For each to-be-detected part, the height value of the to-be-detected part is obtained from each profile data, and the average deformation amount of the to-be-detected part is determined according to a plurality of height values of the to-be-detected part.

[0073] For each to-be-detected part, whether the to-be-detected part is a deformed part is determined according to the average deformation amount corresponding to the to-be-detected part and the height threshold value corresponding to the to-be-detected part.

[0074] In this embodiment, for each to-be-detected part, the average deformation amount of the to-be-detected part is the average value of the height values of the to-be-detected part in the plurality of obtained profile data. If the average deformation amount corresponding to the to-be-detected part is greater than the height threshold value corresponding to the to-be-detected part, it is determined that the to-be-detected part is a deformed part. If the average deformation amount corresponding to the to-be-detected part is less than or equal to the height threshold value corresponding to the to-be-detected part, it is determined that the to-be-detected part is not a deformed part.

[0075] In this embodiment, for each deformed part, the deformation amount of the deformed part is determined according to the difference between the average deformation amount corresponding to the deformed part and the height threshold value corresponding to the deformed part. Specifically, the deformation amount of the deformed part is equal to the value obtained by subtracting the height threshold value corresponding to the deformed part from the average deformation amount corresponding to the deformed part.

[0076] Embodiment Two

[0077] On the basis of the above-mentioned embodiment one, for each to-be-detected part, the method further includes:

[0078] According to the average deformation corresponding to the to-be-detected part and the height threshold corresponding to the to-be-detected part, a blade body surface deformation rule of the hollow guide vane in the directional solidification process is determined.

[0079] The blade body surface deformation rule is that, in the directional solidification process of the hollow guide vane, the deformation of the leading edge and the middle part of the hollow guide vane is large, and the deformation of the trailing edge of the hollow guide vane is small or non-deformation; the deformation of the leading edge of the hollow guide vane is shrinkage, and the deformation of the middle part of the hollow guide vane is bulging.

[0080] In the step S2, according to the plurality of surface data, a deformation part of the hollow guide vane is determined, including:

[0081] According to the plurality of surface data, a blade body surface deformation rule of the hollow guide vane in the directional solidification process is determined.

[0082] According to the blade body surface deformation rule, a deformation part of the hollow guide vane is determined.

[0083] Wherein, the hollow guide vane back profile is called a back profile, and the hollow guide vane basin profile is called a basin profile. By comparing the average deformation corresponding to the to-be-detected part with the height threshold corresponding to the to-be-detected part, the blade body surface deformation rule of the hollow guide vane in the directional solidification process is analyzed, specifically: the hollow guide vane back profile is basically non-deformation, the hollow guide vane basin profile has a large shrinkage in the leading edge, a bulging in the middle part, and a non-deformation in the trailing edge, as shown in Figure 4 , Figure 4 The trailing edge of the hollow guide vane is on the upper right, Figure 4 Wherein, the upper solid line represents the hollow guide vane basin theoretical profile, the lower solid line represents the hollow guide vane back theoretical profile and the hollow guide vane back profile after deformation, and the dashed line represents the hollow guide vane basin profile after deformation. According to the blade body surface deformation rule of the hollow guide vane in the directional solidification process analyzed, the leading edge and the middle part of the hollow guide vane basin profile are determined as the deformation part of the hollow guide vane.

[0084] Embodiment three

[0085] In order to improve the processing efficiency and product qualification rate, the embodiment provides a hollow guide vane surface generation method, including:

[0086] For each profile line of the hollow guide vane, a plurality of profile line data corresponding to the profile line are obtained, and each profile line data includes a height value of a plurality of parts of the profile line of the hollow guide vane in the directional solidification process;

[0087] For each profile line, multiple profile line data corresponding to the profile line are used as profile data. The method for determining the variable allowance of the hollow guide blade profile provided in Embodiment 1 or Embodiment 2 is executed to determine the deformation part corresponding to the profile line and the variable allowance corresponding to each deformation part.

[0088] For each profile line, correction data for the profile line is determined based on the deformation part corresponding to the profile line and the allowance corresponding to each deformation part. The correction data includes the correction amount for each deformation part corresponding to the profile line.

[0089] Based on the correction data corresponding to each profile line of the hollow guide vane, the profile of the hollow guide vane is shaped to obtain the profile structure corresponding to the hollow guide vane.

[0090] The step of shaping the hollow guide vane profile based on the correction data corresponding to each of the hollow guide vane profile lines to obtain the profile structure corresponding to the hollow guide vane includes:

[0091] For each profile of the hollow guide vane, determine the coordinates of each deformed part corresponding to the profile, divide the profile according to the coordinates to obtain multiple curves corresponding to the profile, and for each curve, perform offset processing according to the correction amount of the deformed part corresponding to each of the two ends of the curve to obtain an offset curve, and smoothly connect each offset curve to obtain the target profile.

[0092] Based on the multiple target profile lines, the surface structure corresponding to the hollow guide vane is obtained.

[0093] In this embodiment, the processing of the profile is achieved through UG (Unigraphics NX) modeling. UG can smooth the formed target profile, such as... Figure 6 As shown, Figure 6 In the diagram, the dividing point is the deformed part, 'a' represents the correction amount corresponding to the deformed part, the theoretical curve is the theoretical profile of the hollow guide vane, and the smooth curve is the curve obtained after smoothing the offset curve using UG.

[0094] In this embodiment, Figure 4 Taking the hollow guide vane shown as an example, the leading edge and middle of the vane's blade base are deformed. The step of determining the correction data for the profile based on the deformed parts corresponding to the profile and the allowance corresponding to each deformed part includes:

[0095] Determine the first variable margin at the leading edge of the hollow guide blade's leaf base and the second variable margin at the middle of the hollow guide blade's leaf base, wherein the first variable margin is the variable margin at the leading edge of the hollow guide blade's leaf base and the second variable margin is the variable margin at the middle of the hollow guide blade's leaf base.

[0096] A first height threshold corresponding to the leading edge of the hollow guide vane and a second height threshold corresponding to the middle part of the hollow guide vane are determined. The first height threshold is the height threshold corresponding to the leading edge of the hollow guide vane, and the second height threshold is the height threshold corresponding to the middle part of the hollow guide vane.

[0097] Subtracting the first variable margin from the first height threshold yields the first correction data, which is the correction amount for the leading edge of the hollow guide vane.

[0098] Subtracting the second variable margin from the second height threshold yields the second correction data, which is the correction amount for the middle of the blade basin of the hollow guide vane.

[0099] The correction data for the profile includes the first correction data and the second correction data;

[0100] like Figure 5 As shown, Figure 5 In the diagram, 'a' represents the first corrected data, 'b' represents the second corrected data, the dark solid line represents the target profile, the light solid line above represents the theoretical profile of the hollow guide vane, and the light solid line below represents both the target profile and the theoretical profile of the hollow guide vane.

[0101] Optionally, determining the correction data for the profile based on the deformed portion corresponding to the profile and the allowance corresponding to each deformed portion further includes:

[0102] Determine the polishing allowance, which represents the height of the hollow guide vane surface to be removed when polishing the hollow guide vane.

[0103] The correction data is determined based on the polishing allowance, the deformed part corresponding to the profile, and the variable allowance corresponding to each deformed part.

[0104] by Figure 4 Taking the hollow guide vane shown as an example, the step of determining the correction data of the profile based on the deformed parts corresponding to the profile and the allowance corresponding to each deformed part includes:

[0105] determining a first variable allowance of a leading edge of a blade basin of the hollow guide vane and a second variable allowance of a middle part of the blade basin of the hollow guide vane, the first variable allowance being a variable allowance of the leading edge of the blade basin of the hollow guide vane, and the second variable allowance being a variable allowance of the middle part of the blade basin of the hollow guide vane;

[0106] determining a first height threshold corresponding to the leading edge of the blade basin of the hollow guide vane and a second height threshold corresponding to the middle part of the blade basin of the hollow guide vane, the first height threshold being a height threshold corresponding to the leading edge of the blade basin of the hollow guide vane, and the second height threshold being a height threshold corresponding to the middle part of the blade basin of the hollow guide vane;

[0107] subtracting the first variable allowance and the allowance of the throw from the first height threshold to obtain third correction data, the third correction data being a correction amount of the leading edge of the blade basin of the hollow guide vane;

[0108] subtracting the second variable allowance and the allowance of the throw from the second height threshold to obtain fourth correction data, the fourth correction data being a correction amount of the middle part of the blade basin of the hollow guide vane;

[0109] the correction data of the profile line includes the third correction data and the fourth correction data.

[0110] Embodiment Four

[0111] On the basis of the above-mentioned embodiment three, the hollow guide vane profile is reshaped according to the correction data corresponding to each of the profile lines of the hollow guide vane, to obtain the profile structure corresponding to the hollow guide vane, including:

[0112] For each of the profile lines of the hollow guide vane, the coordinates of each of the deformation positions corresponding to the profile line are determined, the profile line is segmented according to the coordinates to obtain a plurality of curves corresponding to the profile line, for each of the curves, the deformation positions corresponding to the two end points of the curve are taken as target positions, the correction amounts and coordinates of the two target positions are determined, one of the two target positions is determined as a reference point according to the coordinates, the profile line is rotated according to the correction amount corresponding to the reference point with the reference point as the origin, to obtain a rotated curve, and the target profile line is obtained by smoothly connecting each of the rotated curves.

[0113] The profile structure corresponding to the hollow guide vane is obtained according to a plurality of target profile lines.

[0114] In this embodiment, the processing of the profile line is realized by UG (Unigraphics NX) modeling, UG

[0115] The target profile line can be realized to be smooth, such asFigure 7 As shown, Figure 7 In the formula, the split point is the deformation part (specifically, the selected reference point), a represents the correction amount corresponding to the deformation part, and the theoretical curve is the theoretical profile of the hollow guide vane.

[0116] The line is the theoretical profile of the hollow guide vane, and the rotation angle a of the curve to be rotated at the reference point is determined according to the correction amount a corresponding to the reference point. The correction amount a is equal to the distance between the end point of the rotation curve corresponding to the curve to be rotated and the end point of the curve to be rotated on the same side.

[0117] Example Five

[0118] In order to improve the processing efficiency and product qualification rate, the embodiment provides a manufacturing method of a mold for a hollow guide vane, comprising:

[0119] According to the profile structure of the third or fourth embodiment, the mold is modeled.

[0120] By modeling and mold design and manufacturing according to the processed profile structure, the mold is completed and standardized, and can be put into production, which can greatly improve the processing efficiency of the hollow guide vane and the product qualification rate.

[0121] Example Six

[0122] Based on the same principle as the determination method of the hollow guide vane blade profile variable allowance described in the above embodiment one, the embodiment provides a determination device of a hollow guide vane blade profile variable allowance, comprising:

[0123] A data acquisition module is configured to acquire a plurality of profile data, each of the profile data comprising a height value of a plurality of parts of the hollow guide vane in a directional solidification process.

[0124] A height value of a plurality of parts of the hollow guide vane in a solidification process;

[0125] A deformation part determination module is configured to determine deformation parts of the hollow guide vane according to the plurality of profile data, the deformation parts being positions of the hollow guide vane that are deformed in the directional solidification process.

[0126] A variable allowance determination module is configured to determine a variable allowance of each of the deformation parts according to an average deformation amount corresponding to the deformation part and a height threshold value corresponding to the deformation part, the average deformation amount corresponding to the deformation part being determined according to the height values of the deformation part in the plurality of profile data, and the variable allowance representing a height value that needs to be compensated for the deformation part of the hollow guide vane in the directional solidification process.

[0127] In the process of acquiring a plurality of profile data, the data acquisition module is specifically configured to:

[0128] For each of the hollow guide vanes, a height value of a corresponding position of the hollow guide vane at each of different sections is obtained, and the height value corresponding to each of the sections is taken as corresponding measurement data of the hollow guide vane;

[0129] According to the respective measurement data of each of the hollow guide vanes, a plurality of profile data are obtained.

[0130] The deformation position determining module is configured to determine the deformation position of the hollow guide vane according to the plurality of profile data, and specifically configured to:

[0131] For each position of the hollow guide vane, the position is taken as a to-be-detected position;

[0132] For each of the to-be-detected positions, a height value of the to-be-detected position is obtained from each of the profile data, and an average deformation amount of the to-be-detected position is determined according to a plurality of height values of the to-be-detected position.

[0133] For each of the to-be-detected positions, whether the to-be-detected position is a deformation position is determined according to the average deformation amount corresponding to the to-be-detected position and a height threshold value corresponding to the to-be-detected position.

[0134] Optionally, the device further comprises a rule determining module configured to determine a blade profile deformation rule of the hollow guide vane in a directional solidification process according to the average deformation amount corresponding to the to-be-detected position and the height threshold value corresponding to the to-be-detected position.

[0135] The blade profile deformation rule is that, in the directional solidification process, a leading edge and a middle part of the hollow guide vane have large deformation amounts, and a trailing edge of the hollow guide vane has a small deformation amount or no deformation; the deformation of the leading edge of the hollow guide vane is shrinkage, and the deformation of the middle part of the hollow guide vane is bulging.

[0136] The deformation position determining module is configured to determine the deformation position of the hollow guide vane according to the plurality of profile data, and specifically configured to:

[0137] The blade profile deformation rule of the hollow guide vane in the directional solidification process is determined according to the plurality of profile data;

[0138] The deformation position of the hollow guide vane is determined according to the blade profile deformation rule.

[0139] Embodiment Seven

[0140] To solve the technical problems in the prior art, the embodiment further provides an electronic device, including a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to realize the method for determining the variable-thickness of the hollow guide vane airfoil profile.

[0141] Embodiment eight

[0142] To solve the technical problems in the prior art, the embodiment further provides a computer readable storage medium, and the computer readable storage medium stores a computer program, and the computer program is executed by a processor to realize the method for determining the variable-thickness of the hollow guide vane airfoil profile.

[0143] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0144] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0145] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0146] In the description of the specification, the description using the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the description herein of certain examples does not necessarily exclude these examples from the scope of the application, and these examples can be combined with each other for the purposes of one or more other examples.

[0147] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be interpreted as limiting the present application, and that variations, modifications, substitutions and changes can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A method for determining the variable camber of a hollow guide vane airfoil profile, characterized in that The mold design stage applied to the hollow guide vane comprises: Step S1, obtaining a plurality of profile data, each of the profile data comprising a height value of a plurality of positions of the hollow guide vane in a directional solidification process; Step S2, determining a deformation position of the hollow guide vane according to the plurality of profile data, the deformation position being a position of the hollow guide vane that deforms in the directional solidification process; specifically: for each position of the hollow guide vane, the position is taken as a to-be-detected position; for each to-be-detected position, a height value of the to-be-detected position is obtained from each profile data, and an average deformation amount of the to-be-detected position is determined according to a plurality of height values of the to-be-detected position; for each to-be-detected position, a blade profile deformation rule of the hollow guide vane in the directional solidification process is determined according to the average deformation amount corresponding to the to-be-detected position and a height threshold value corresponding to the to-be-detected position; and a to-be-detected position of the hollow guide vane that is the deformation position is determined according to the blade profile deformation rule; Wherein, the blade profile deformation rule is that in the directional solidification process, a leading edge and a middle part of the hollow guide vane have large deformation amounts, and a trailing edge of the hollow guide vane has a small deformation amount or no deformation; the deformation of the leading edge of the hollow guide vane is shrinkage, and the deformation of the middle part of the hollow guide vane is bulging; Step S3, for each deformation position, a deformation allowance of the deformation position is determined according to the average deformation amount corresponding to the deformation position and the height threshold value corresponding to the deformation position; the average deformation amount corresponding to the deformation position is determined according to the height value of the deformation position in the plurality of profile data, and the deformation allowance represents a height value that needs to be compensated for the deformation position of the hollow guide vane in the directional solidification process, and is used to compensate for the deformation position in mold profile design.

2. The method of claim 1, wherein, In the step S1, the plurality of profile data is obtained, comprising: For each hollow guide vane, a height value of a position corresponding to each section of the hollow guide vane at different sections is obtained, the height value corresponding to each section is taken as a measurement data corresponding to the hollow guide vane; and a plurality of profile data is obtained according to the respective measurement data corresponding to each hollow guide vane. Comprising:

3. A method of generating a hollow guide vane profile, characterized in that For each profile line of the hollow guide vane, a plurality of profile line data corresponding to the profile line is obtained, each of the profile line data comprising a height value of a plurality of positions of the profile line of the hollow guide vane in the directional solidification process; For each profile line, the plurality of profile line data corresponding to the profile line is taken as profile data, and the method in any one of claims 1 or 2 is executed to determine a deformation position corresponding to the profile line and a deformation allowance corresponding to each deformation position; For each profile line, correction data of the profile line is determined according to the deformation position corresponding to the profile line and the deformation allowance corresponding to each deformation position, the correction data comprising a correction amount of each deformation position corresponding to the profile line; ​ According to the correction data corresponding to each of the profile lines of the hollow guide vane, the profile of the hollow guide vane is reshaped to obtain the profile structure corresponding to the hollow guide vane.

4. The method of claim 3, wherein, The method for reshaping the profile of the hollow guide vane according to the correction data corresponding to each of the profile lines of the hollow guide vane to obtain the profile structure corresponding to the hollow guide vane comprises: For each of the profile lines of the hollow guide vane, the coordinates of each of the deformation positions corresponding to the profile line are determined, the profile line is segmented according to the coordinates to obtain a plurality of curves corresponding to the profile line, for each of the curves, the curve is offset processed according to the correction amount of the deformation position corresponding to each of the two end points of the curve to obtain an offset curve, and each of the offset curves is smoothly connected to obtain a target profile line; The profile structure corresponding to the hollow guide vane is obtained according to the plurality of target profile lines.

5. The method of claim 3, wherein, The method for reshaping the profile of the hollow guide vane according to the correction data corresponding to each of the profile lines of the hollow guide vane to obtain the profile structure corresponding to the hollow guide vane comprises: For each of the profile lines of the hollow guide vane, the coordinates of each of the deformation positions corresponding to the profile line are determined, the profile line is segmented according to the coordinates to obtain a plurality of curves corresponding to the profile line, for each of the curves, the curve is offset processed according to the correction amount of the deformation position corresponding to each of the two end points of the curve to obtain an offset curve, and each of the offset curves is smoothly connected to obtain a target profile line; The profile structure corresponding to the hollow guide vane is obtained according to the plurality of target profile lines.

6. A manufacturing method for a mold for a hollow guide vane, characterized by, Comprise: The profile structure according to any one of claims 3 to 5 is modeled to obtain a mold.

7. An electronic device, comprising: The computer readable storage medium stores a computer program, and the computer program is executed by the processor to realize the method for determining the variable allowance of the profile of the hollow guide vane blade body according to any one of claims 1 or 2.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to realize the method for determining the variable allowance of the profile of the hollow guide vane blade body according to any one of claims 1 or 2.

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