CN217666220U - Directional blade wax matrix structure - Google Patents
Directional blade wax matrix structure Download PDFInfo
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- CN217666220U CN217666220U CN202221441419.7U CN202221441419U CN217666220U CN 217666220 U CN217666220 U CN 217666220U CN 202221441419 U CN202221441419 U CN 202221441419U CN 217666220 U CN217666220 U CN 217666220U
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Abstract
The utility model discloses a directional blade wax matrix structure, include the blade wax matrix, select brilliant ware wax matrix and chassis wax matrix, the blade wax matrix with the chassis wax matrix sets up through a plurality of side by side select the brilliant ware wax matrix to link to each other, each select the single crystal grain that brilliant ware wax matrix chooseed to grow into side by side in the blade wax matrix to constitute the formation column crystal structure of directional blade. The directional blade wax mold structure can accurately control the number of the columnar crystals in each blade by controlling the number of the crystal selector wax molds, and can control the width of each crystal grain by controlling the width of the seeding transition section, thereby ensuring the uniformity and consistency of the directional columnar crystal structure.
Description
Technical Field
The utility model belongs to the technical field of high temperature alloy investment casting, especially, relate to a directional blade wax matrix structure.
Background
In the production of turbine directional blades, it is common to add a lift plate to the lower end of the blade and the quench bottom, the lift plate having a width equal to the blade body and a shape similar to the blade body. When in pouring, the metal liquid in the vertical plate of the crystal pulling plate is cooled by the chilling bottom plate, and a large amount of columnar crystal grains grow upwards and enter the blade body. However, the size of the columnar crystal grains of the directional blade prepared by the method is not controllable, and the consistency and uniformity of the obtained columnar crystal structure are difficult to guarantee. In addition, for some directional blades, because the air inlet and outlet edges (particularly the air outlet edge) of the blade body are in a significant contraction state, in the process of growing the columnar crystal grains close to the two edges vertically upwards, the grain boundary of the columnar crystal grains is inevitably intersected with the air inlet and outlet edges inclined inwards, so that the so-called outcrop crystal defect is formed, and the technical standard is not met, so that the judgment is wasted.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a directional blade wax matrix structure, and this directional blade wax matrix structure selects the brilliant number of column in the number of brilliant ware wax matrix can the accurate control every blade through control, and the width of every crystalline grain can be controlled through the width of control seeding changeover portion, has guaranteed the homogeneity and the uniformity of directional column crystal structure.
Therefore, the embodiment of the utility model provides a directional blade wax matrix structure, include blade wax matrix, select brilliant ware wax matrix and chassis wax matrix, the blade wax matrix with the chassis wax matrix is through a plurality of setting side by side select brilliant ware wax matrix to link to each other, respectively select the single crystal grain that brilliant ware wax matrix was elected can be growing into side by side in the blade wax matrix to constitute the columnar crystal texture of directional blade.
Specifically, the blade wax matrix comprises an upper edge plate, a lower edge plate and a blade body, wherein an exhaust edge is arranged on the left side of the blade body, an air inlet edge is arranged on the right side of the blade body, and the exhaust edge and the air inlet edge are gradually inclined towards the middle of the blade body from bottom to top.
Concretely, it isEach crystal selector wax mold is connected with the blade wax mold through a crystal seeding transition section, the crystal seeding transition sections of the crystal selector wax molds are sequentially arranged on the lower flange plate from left to right, the width k of the crystal seeding transition section of the crystal selector wax mold positioned at the leftmost side is larger than a + d, and the width k of the crystal seeding transition section of the crystal selector wax mold positioned at the rightmost side 1 Is greater than a 1 +d 1 ；
Wherein a is the distance from the exhaust edge to the left edge of the lower edge plate, and a 1 Is the distance from the air inlet edge to the right edge of the lower edge plate, d is the difference between the chord widths of the upper end and the lower end of the air outlet edge, d 1 The difference value of the chord widths of the upper end and the lower end of the air inlet edge is used.
Specifically, the crystal selector wax mold adopts a spiral crystal selector wax mold.
Specifically, the seeding transition sections of the crystal selector wax molds are sequentially connected end to end from left to right.
Specifically, the orthographic projection of the blade body on the lower edge plate is positioned in the orthographic projection of each seeding transition section on the lower edge plate, and the two are similar in shape.
Specifically, the seeding transition section of the rightmost crystal selector wax mold extends to each outer convex corner on the right side of the lower edge plate, and the seeding transition section of the leftmost crystal selector wax mold extends to each outer convex corner on the left side of the lower edge plate.
Compared with the prior art, the utility model discloses at least one embodiment has following beneficial effect: different from the common directional solidification process, the directional solidification structure in the casting obtained by utilizing the blade wax mold structure is composed of a plurality of single crystal grains after crystal selection, the primary crystal direction of each grain is basically vertical, the growth speed is basically the same, the grain boundary is basically vertical, the number of columnar crystals in each blade can be accurately controlled by controlling the number of crystal selectors, the width of each grain can be controlled by controlling the width of the seeding transition section, and the uniformity and consistency of the directional columnar crystal structure are ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained without creative efforts.
FIG. 1 is a schematic view of a directional blade wax pattern structure provided by an embodiment of the present invention;
wherein: 1. a blade wax pattern; 101. an upper edge plate; 102. a lower flange plate; 103. a leaf body; 104. an exhaust edge; 105. an air inlet side; 2. selecting a wax mould of a crystal selector; 3. a chassis wax pattern; 4. a seeding transition section.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and to simplify the description, but 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 should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, a directional blade wax pattern structure comprises a blade wax pattern 1, a crystal selector wax pattern 2 and a chassis wax pattern 3, wherein the blade wax pattern 1 is connected with the chassis wax pattern 3 through a plurality of crystal selector wax patterns 2 arranged side by side, and single crystal grains selected by each crystal selector wax pattern 2 can grow into the blade wax pattern 1 side by side, so that a columnar crystal structure of a directional blade is formed.
Different from a common directional solidification process, a directional solidification structure in a casting obtained by utilizing the blade wax mold 1 structure in the embodiment is composed of a plurality of single crystal grains after crystal selection, as the primary crystal orientation of each grain is basically in a vertical direction, the growth speed is basically the same, the crystal boundary is basically vertical, the number of columnar crystals in each blade can be accurately controlled by controlling the number of crystal selectors, the width of each grain can be controlled by controlling the width of a seeding transition section, and the uniformity and consistency of the directional columnar crystal structure are ensured.
Referring to fig. 1, in some embodiments, the blade wax pattern 1 includes an upper edge plate 101, a lower edge plate 102 and a blade body 103, and as seen from the perspective in the drawing, a left side of the blade body 103 is provided with a discharge edge 104, and a right side of the blade body 103 is provided with an intake edge 104, and the discharge edge 104 and the intake edge 104 are gradually inclined from bottom to top toward the middle (i.e., inward) of the blade body 103. The blade wax matrix 1 that this embodiment provided has air inlet and outlet limit structure, utilizes air inlet and outlet limit can cool off the blade to reach extension blade life, improve the purpose of blade reliability.
In a specific design, each crystal selector wax mold 2 is connected with a lower edge plate 102 of the blade wax mold 1 through a seeding transition section 4, the seeding transition sections 4 of the plurality of crystal selector wax molds 2 are sequentially arranged on the lower edge plate 102 from left to right, and single crystal grains selected by each crystal selector wax mold 2 can pass through the lower edge plate 102 and enter the blade body 103. The crystal selector wax mold 2 may be a spiral crystal selector wax mold, or other types of crystal selector wax molds 2 may be used as long as a single crystal structure can be obtained.
Referring to fig. 1, in other embodiments, the width k = a + b and d < b of the seeding transition section 4 of the leftmost mold selector wax 2 can also solve the problem of outcrop because, if the width k of the seeding transition section 4 is less than a + d, i.e., b < d, the width (b-d) of the upper end of the grain is less than 0, the grain boundary of the grain intersects with the gas discharge edge 104, and so-called outcrop defects are generated, where a is the distance from the gas discharge edge 104 to the left edge of the lower edge plate 102, d is the difference between the chord widths of the upper and lower ends of the gas discharge edge 104, i.e., d = c · tan θ (c is the distance between the upper and lower edge plates, i.e., the throat width, and θ is the inclination angle of the gas discharge edge 104). Similarly, the seed selector and seeding design on the side of the gas inlet edge 104 may be referred to the gas outlet edge 104, but the width of the seeding transition section 4 may be reduced due to the smaller inward contraction angle.
In the embodiment, a plurality of crystal selectors replace a common crystal starting vertical plate between the blade and the chilling bottom plate, the sizes of the seeding transition sections 4 of the two crystal selectors at the positions of the air inlet edge and the air outlet edge are controlled, the purpose of controlling the number and the positions of columnar crystals is achieved, the situation that narrow crystal grains grow out of the side face of the blade body at the positions of the air inlet edge and the air outlet edge can be avoided, and thus the oriented columnar crystal structure without outcrop crystals is obtained.
Specifically, the seeding transition sections 4 of the crystal selector wax molds 2 are sequentially connected end to end from left to right, the orthographic projections of the blade bodies 103 on the lower edge plate 102 are located in the orthographic projections of the seeding transition sections 4 on the lower edge plate 102, and the shapes of the seeding transition sections and the orthographic projections are similar.
Referring to fig. 1, in other embodiments, the seeding transition section 4 of the rightmost crystal selector wax mold 2 extends to each convex corner on the right side of the lower edge plate 102, and the seeding transition section 4 of the leftmost crystal selector wax mold 2 extends to each convex corner on the left side of the lower edge plate 102, so that the mixed crystal with disordered crystal directions at the edges of the edge plate can be effectively avoided, and the mixed crystal grows into the blade body 103.
In addition, in order to ensure that the grain size meets the technical standard requirements, the value of b needs to be less than or equal tob M Wherein b is M The width of the columnar crystal grains is reduced to be less than the maximum crystal grain width b allowed by the technical standard because the middle columnar crystal grains do not have the risk of being outcrop crystals M For this purpose, the distance between the crystal selectors and the width of the seeding transition section can be reduced by a suitable amount.
In addition to other claims, if a numerical range is disclosed, the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the number of the numerical values is too large to be exhaustive, the present invention discloses some numerical values to exemplify the technical solutions of the present invention, and the numerical values listed above should not be construed as limiting the scope of the present invention.
Also, above-mentioned the utility model discloses if disclose or related to mutually fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding) can, of course, also be replaced by one-piece structures (e.g. manufactured in one piece using a casting process) (unless it is obvious that one-piece processes cannot be used).
In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated. The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.
The above examples are only examples for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.
Claims (7)
1. The utility model provides a directional blade wax matrix structure which characterized in that: the blade wax mold comprises a blade wax mold (1), a crystal selector wax mold (2) and a chassis wax mold (3), wherein the blade wax mold (1) and the chassis wax mold (3) are connected through a plurality of crystal selector wax molds (2) arranged side by side, and single crystal grains selected by the crystal selector wax molds (2) can grow into the blade wax mold (1) side by side to form a columnar crystal structure.
2. The directional blade wax pattern structure of claim 1, wherein: the blade wax mold (1) comprises an upper edge plate (101), a lower edge plate (102) and a blade body (103), wherein an exhaust edge (104) and an air inlet edge (105) which are inclined inwards are respectively arranged on the left side and the right side of the blade body (103).
3. The directional blade wax pattern structure of claim 2, wherein: each crystal selector wax mold (2) is connected with a lower edge plate (102) of the blade wax mold (1) through a seeding transition section (4), the seeding transition sections (4) of the crystal selector wax molds (2) are sequentially arranged on the lower edge plate (102) from left to right, the width k of the seeding transition section (4) of the crystal selector wax mold (2) positioned at the leftmost side is greater than a + d, and the width k1 of the seeding transition section (4) of the crystal selector wax mold (2) positioned at the rightmost side is greater than a1+ d1;
wherein a is the distance from the exhaust edge (104) to the left edge of the lower edge plate (102), a1 is the distance from the air inlet edge (105) to the right edge of the lower edge plate (102), d is the chord width difference between the upper end and the lower end of the exhaust edge (104), and d1 is the chord width difference between the upper end and the lower end of the air inlet edge (105).
4. The directional blade wax pattern structure of claim 3, wherein: and the seeding transition sections (4) of the crystal selector wax molds (2) are sequentially connected end to end from left to right.
5. The directional blade wax pattern structure of claim 3, wherein: the orthographic projection of the blade body (103) on the lower edge plate (102) is positioned in the orthographic projection of each seeding transition section (4) on the lower edge plate (102), and the shapes of the two are similar.
6. The directional blade wax pattern structure of claim 3, wherein: the seeding transition section (4) of the rightmost crystal selector wax mold (2) extends to each outer convex corner on the right side of the lower edge plate (102), and the seeding transition section (4) of the leftmost crystal selector wax mold (2) extends to each outer convex corner on the left side of the lower edge plate (102).
7. The directional blade wax pattern structure of any of claims 1-6, wherein: the crystal selector wax mold (2) adopts a spiral crystal selector wax mold.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221441419.7U CN217666220U (en) | 2022-06-10 | 2022-06-10 | Directional blade wax matrix structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221441419.7U CN217666220U (en) | 2022-06-10 | 2022-06-10 | Directional blade wax matrix structure |
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| CN217666220U true CN217666220U (en) | 2022-10-28 |
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| CN202221441419.7U Active CN217666220U (en) | 2022-06-10 | 2022-06-10 | Directional blade wax matrix structure |
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