Gas turbine blade fixture

Abstract

The present invention provides a gas turbine blade fixture, which is used to shield the cooling holes on the gas turbine blade during the gas turbine blade spraying process, and includes: a shielding member, at least two embedded toes and a fixing member; at least two embedded toes are connected to the shielding member; one end of the fixing member is connected to one end of the shielding member; when at least two embedded toes are respectively embedded in at least two matching cooling holes on the gas turbine blade, the shielding member fits with the outlet edge of the gas turbine blade to shield each cooling hole on the outlet edge of the gas turbine blade, and the other end of the fixing member is connected to the gas turbine blade to limit the relative position of the shielding member and the gas turbine blade. This solution can prevent the coating from entering the cooling hole of the gas turbine blade when the thermal barrier coating is sprayed on the gas turbine blade.

Description

Technical Field

[0001] The invention relates to the technical field of gas turbine machinery, in particular to a gas turbine rotor blade clamp. Background Art

[0002] There are cooling holes on the outlet edge of the gas turbine blades or turbine blades. When spraying thermal barrier coatings on the turbine blades, the cooling holes on the outlet edge need to be shielded and protected to avoid the formation of coatings on the surfaces of the cooling holes.

[0003] Currently, when spraying thermal barrier coatings on turbine blades, high-temperature resistant tape is usually used to stick it on the cooling holes of the turbine blades to cover the cooling holes.

[0004] However, when the temperature during spraying of the thermal barrier coating is higher than the maximum temperature resistance of the high-temperature resistant tape, the high-temperature resistant tape will be damaged, causing the coating to enter the cooling holes when spraying the thermal barrier coating on the turbine blades, thereby failing to effectively shield the cooling holes of the turbine blades. Summary of the invention

[0005] In order to solve the above and / or other technical problems, the present invention provides a gas turbine blade fixture, which can prevent the coating from entering the cooling hole of the gas turbine blade when the thermal barrier coating is sprayed on the gas turbine blade.

[0006] The present invention provides a gas turbine blade fixture, which is used to shield cooling holes on a gas turbine blade during a gas turbine blade spraying process, and comprises: a shielding member, at least two embedded toes and a fixing member;

[0007] The at least two embedded toes are connected to the shielding member;

[0008] One end of the fixing member is connected to one end of the shielding member;

[0009] When the at least two embedded toes are respectively embedded in at least two matching cooling holes on the gas turbine moving blade, the shielding member fits against the air outlet edge of the gas turbine moving blade to shield each of the cooling holes located on the air outlet edge of the gas turbine moving blade, and the other end of the fixing member is connected to the gas turbine moving blade to limit the relative position of the shielding member and the gas turbine moving blade.

[0010] Preferably,

[0011] The fixing member comprises: a connecting rod and a positioning member;

[0012] The first end of the connecting rod is connected to one end of the shielding member, and the second end of the connecting rod is connected to the positioning member;

[0013] When the at least two embedded toes are respectively embedded in at least two matching cooling holes on the gas turbine rotor blade, the positioning member is connected to the gas turbine rotor blade.

[0014] Preferably,

[0015] The positioning member comprises: a first bolt, a first nut and a positioning rod;

[0016] The first nut is welded on the second end of the connecting rod;

[0017] The positioning rod is connected to the connecting rod;

[0018] When the at least two embedded toes are respectively embedded in at least two matching cooling holes on the gas turbine rotor blade, the positioning rod is embedded in the positioning hole on the gas turbine rotor blade, and the first bolt is threadedly connected to the first nut and then threadedly connected to the first threaded hole on the gas turbine rotor blade.

[0019] Preferably,

[0020] The gas turbine rotor blade fixture further comprises: shielding tail plate and blade root reinforcement;

[0021] The shielding tail plate is connected to the blade root of the gas turbine rotor blade;

[0022] One end of the blade root reinforcement is connected to the shielding tail plate, and the other end of the blade root reinforcement is connected to the shielding member, so as to limit the relative position between the shielding member and the gas turbine rotor blade.

[0023] Preferably,

[0024] The blade root reinforcement comprises: a U-shaped rigid structural member, a second bolt and a second nut;

[0025] One end of the U-shaped rigid structure is connected to the shielding member, and the other end of the U-shaped rigid structure is welded with the second nut;

[0026] When the at least two embedded toes are respectively embedded in at least two matching cooling holes on the gas turbine rotor blade, the second bolt is threadedly connected to the second nut and then connected to the second threaded hole on the shielding tail plate.

[0027] Preferably,

[0028] The shielding member comprises: a horizontal shielding plate and a vertical shielding plate;

[0029] The horizontal shielding plate and the vertical shielding plate are both rectangular flat plate structures;

[0030] One edge of the horizontal shielding plate is vertically connected to the vertical shielding plate to form a rod-shaped structure with a T-shaped cross section;

[0031] The at least two embedded toes are both located on the first side of the horizontal shielding plate, and the root of each embedded toe is connected to the connection between the first side of the horizontal shielding plate and the vertical shielding plate.

[0032] Preferably,

[0033] The gas turbine rotor blade fixture further comprises: shield plate reinforcement ribs;

[0034] The shielding plate reinforcement rib is welded to the second side surface of the horizontal shielding plate in a direction parallel to the vertical shielding plate.

[0035] Preferably,

[0036] The shielding plate reinforcement rib is integrally formed with the connecting rod.

[0037] Preferably,

[0038] The gas turbine rotor blade fixture further comprises: at least one positioning rod reinforcement rib;

[0039] One end of the positioning rod reinforcement rib is connected to the connecting rod, and the other end of the positioning rod reinforcement rib is connected to the positioning rod.

[0040] Preferably,

[0041] The curvature of the connecting rod is the same as the curvature of the gas turbine rotor blade.

[0042] The present invention provides a gas turbine blade fixture, each embedded toe matches a cooling hole on a gas turbine blade, and the embedded toe matching the cooling hole is connected to a shielding member according to the arrangement order of the cooling holes on the gas turbine blade, and the embedded toe can be fixed by the shielding member, so that the embedded toe is conveniently embedded in the matching cooling hole. Since the embedded toe is connected to the shielding member, after the embedded toe is embedded in the cooling hole, the shielding member can fit with the outlet edge of the gas turbine blade to shield the cooling hole, thereby preventing the coating from entering the cooling hole of the gas turbine blade when the thermal barrier coating is sprayed on the gas turbine blade. In order to improve the firmness between the embedded toe and the shielding member, the embedded toe can be connected to the shielding member by laser welding. In order to prevent the shielding member from being displaced when the thermal barrier coating is sprayed on the gas turbine blade, resulting in poor shielding effect on the cooling hole, a fixing member is connected between the shielding member and the gas turbine blade, so that the relative position between the shielding member and the gas turbine blade is limited by the fixing member. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 is a schematic diagram of a gas turbine rotor blade fixture provided by an embodiment of the present invention;

[0045] Figure 2 is a schematic diagram of a fixing member provided by an embodiment of the present invention;

[0046] Figure 3 is a schematic diagram of a positioning member provided by an embodiment of the present invention;

[0047] Figure 4 is a schematic diagram of a gas turbine rotor blade fixture provided by another embodiment of the present invention;

[0048] Figure 5 is a schematic diagram of a blade root reinforcement provided by an embodiment of the present invention;

[0049] Figure 6 is a schematic diagram of a shielding member provided by an embodiment of the present invention;

[0050] Figure 7 is a schematic diagram of a gas turbine rotor blade fixture provided by another embodiment of the present invention;

[0051] Figure 8 It is a schematic diagram of a gas turbine blade fixture provided by another embodiment of the present invention.

[0052] List of reference numerals:

[0053] 1: Shielding part 2: Embedded toe 3: Fixing part

[0054] 4: Blade root reinforcement 5: U-shaped rigid structural member 6: Second bolt

[0055] 8: Shielding plate reinforcement 9: Positioning rod reinforcement 101: Horizontal shielding plate

[0056] 102: vertical shielding plate 301: connecting rod 302: positioning member

[0057] 3021: First bolt 3022: First nut 3023: Positioning rod DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0059] like Figure 1 As shown, the present invention provides a gas turbine blade (or turbine blade) fixture, which is used to shield the cooling holes on the turbine blade during the turbine blade spraying process, and includes: a shielding member 1, at least two embedded toes 2 and a fixing member 3;

[0060] The at least two embedded toes 2 are connected to the shielding member 1;

[0061] One end of the fixing member 3 is connected to one end of the shielding member 1;

[0062] When the at least two embedded toes 2 are respectively embedded in at least two matching cooling holes on the turbine blade, the shielding member 1 fits against the air outlet edge of the turbine blade to shield each of the cooling holes located on the air outlet edge of the turbine blade, and the other end of the fixing member 3 is connected to the turbine blade to limit the relative position of the shielding member 1 and the turbine blade.

[0063] In this embodiment, each embedded toe matches a cooling hole on the turbine blade. According to the arrangement order of the cooling holes on the turbine blade, the embedded toe matching the cooling hole is connected to the shielding member, and the embedded toe can be fixed by the shielding member, so that it is convenient to embed the embedded toe into the matching cooling hole. Since the embedded toe is connected to the shielding member, after the embedded toe is embedded in the cooling hole, the shielding member can fit with the air outlet edge of the turbine blade to shield the cooling hole, thereby preventing the coating from entering the cooling hole of the turbine blade when the thermal barrier coating is sprayed on the turbine blade. In order to improve the firmness between the embedded toe and the shielding member, the embedded toe can be connected to the shielding member by laser welding. In order to prevent the shielding member from being displaced when the thermal barrier coating is sprayed on the turbine blade, resulting in poor shielding effect on the cooling hole, a fixing member is connected between the shielding member and the turbine blade to limit the relative position between the shielding member and the turbine blade by the fixing member.

[0064] It should be noted that at least two embedded toes include embedded toes that match the cooling holes at both ends of the air outlet edge of the turbine blade, that is, an embedded toe is respectively provided at both ends of the shielding member to ensure the shielding effect of the air outlet edge.

[0065] In order to improve the shielding effect of the shielding member, in one embodiment of the present invention, Figure 2 As shown, the fixing member 3 includes: a connecting rod 301 and a positioning member 302;

[0066] The first end of the connecting rod 301 is connected to one end of the shielding member 1, and the second end of the connecting rod 301 is connected to the positioning member 302;

[0067] When the at least two embedded toes 2 are respectively embedded in at least two matching cooling holes on the turbine blade, the positioning member 302 is connected to the turbine blade.

[0068] In this embodiment, in order to ensure that the positioning member can be connected to the specified position of the turbine blade when the embedding toe is embedded in the matching cooling hole, the positioning member and the shielding member can be connected by a connecting rod to avoid the inability to connect to the specified position of the turbine blade due to factors such as the structure of the positioning member.

[0069] Specifically, in order to enhance the strength and rigidity of the connecting rod, a connecting rod reinforcing rib is provided at the bending portion of the connecting rod to enhance the load-bearing capacity of the connecting rod.

[0070] Since there is a certain curvature between the leading edge and the trailing edge of the turbine blade, in order to prevent the position of the connecting rod from affecting the spraying of the thermal barrier coating on the turbine blade when the positioning piece is connected to the turbine blade, in one embodiment of the present invention, the curvature of the connecting rod 301 is the same as the curvature of the turbine blade.

[0071] In order to improve the limiting effect of the relative position of the shielding member and the turbine blade, in one embodiment of the present invention, as Figure 3 As shown, the positioning member 302 includes: a first bolt 3021, a first nut 3022 and a positioning rod 3023;

[0072] The first nut 3022 is welded on the second end of the connecting rod 301;

[0073] The positioning rod 3023 is connected to the connecting rod 301;

[0074] When the at least two embedded toes 2 are respectively embedded in at least two matching cooling holes on the turbine blade, the positioning rod 3023 is embedded in the positioning hole on the turbine blade, and the first bolt 3021 is threadedly connected with the first nut 3022 and then threadedly connected with the first threaded hole on the turbine blade.

[0075] In this embodiment, the positioning hole can be set on the end opposite to the root direction of the turbine blade. When the direction from the end opposite to the root direction to the root is the first direction, for example, the direction perpendicular to the ground. After the positioning rod is embedded in the positioning hole, it can limit the displacement of the positioning rod in the second direction perpendicular to the first reverse direction (for example, the direction horizontal to the ground), thereby limiting the displacement of the connecting rod in the second direction. Similarly, the first bolt cooperates with the first nut, so that the first bolt can be threadedly connected in the first threaded hole on the end opposite to the root direction of the turbine blade, limiting the displacement of the first bolt in the second direction, thereby further limiting the displacement of the connecting rod in the second direction. Since the embedded toe on the shielding member can limit the movement of the shielding member in the first direction after being embedded in the matching cooling hole, and the connecting rod is connected to the shielding member, the displacement of the shielding member in the second direction can be limited, thereby ensuring the shielding effect of the shielding member on the cooling hole and preventing the coating of the thermal barrier coating from entering the cooling hole.

[0076] In order to further improve the shielding effect of the shielding member, Figure 4 As shown, in one embodiment of the present invention, the turbine blade fixture further comprises: shielding tail plate and blade root reinforcement 4;

[0077] The shielding tail plate is connected to the blade root of the turbine blade;

[0078] One end of the blade root reinforcement 4 is connected to the shielding tail plate, and the other end of the blade root reinforcement 4 is connected to the shielding member 1 to limit the relative position between the shielding member 1 and the turbine blade.

[0079] In this embodiment, the shielding tail plate is connected to the root portion of the turbine blade to fix the shielding tail plate, and then the two ends of the blade root reinforcement are respectively connected to the shielding tail plate and the shielding member. The blade root reinforcement can be fixed by the shielding tail plate so that the blade root reinforcement can limit the shielding member to prevent the shielding member from being displaced when the thermal barrier coating is sprayed on the turbine blade, thereby improving the shielding effect of the shielding member and preventing the paint of the thermal barrier coating from entering the cooling hole.

[0080] In order to improve the limiting effect of the shielding member, such as Figure 5 As shown, in one embodiment of the present invention, the blade root reinforcement 4 includes: a U-shaped rigid structure 5, a second bolt 6 and a second nut;

[0081] One end of the U-shaped rigid structure 5 is connected to the shielding member 1, and the other end of the U-shaped rigid structure 5 is welded with the second nut;

[0082] When the at least two embedded toes 2 are respectively embedded in the at least two matching cooling holes on the turbine blade, the second bolt 6 is threadedly connected with the second nut and then connected to the second threaded hole on the shielding tail plate.

[0083] In this embodiment, the second nut is connected to one end of the U-shaped rigid structure. By cooperating with the second bolt, the end of the U-shaped rigid structure connected to the second bolt can be connected to the shielding tail plate. The pre-tightening force applied to the U-shaped rigid structure by the second nut can limit the relative position of the shielding member and the turbine blade through the U-shaped rigid structure, so that the shielding member fits on the cooling hole of the turbine blade to ensure the shielding effect of the cooling hole.

[0084] In order to improve the shielding effect of cooling holes, Figure 6 As shown, in one embodiment of the present invention, the shielding member 1 comprises: a horizontal shielding plate 101 and a vertical shielding plate 102;

[0085] The horizontal shielding plate 101 and the vertical shielding plate 102 are both rectangular flat plate structures;

[0086] One edge of the horizontal shielding plate 101 is vertically connected to the vertical shielding plate 102 to form a rod-shaped structure with a T-shaped cross section;

[0087] The at least two embedded toes 2 are both located on the first side surface of the horizontal shielding plate 101 , and the root of each embedded toe 2 is connected to the connection between the first side surface of the horizontal shielding plate 101 and the vertical shielding plate 102 .

[0088] In this embodiment, the embedded toe is connected to the first side surface of the horizontal shielding plate and the connection between the horizontal shielding plate and the vertical shielding plate, which can enhance the connection strength of the embedded toe and prevent the embedded toe from falling off from the horizontal shielding plate due to high temperature when the thermal barrier coating is sprayed on the turbine blade. When the embedded toe is embedded in the matching cooling hole, the horizontal shielding plate can fit with the outlet edge of the turbine blade, and the vertical shielding plate can fit with the edge of the outlet edge of the turbine blade to ensure the shielding effect of the cold zone hole.

[0089] In order to ensure the shielding effect of the shielding member, Figure 7 As shown, in one embodiment of the present invention, the turbine blade fixture further comprises: a shielding plate reinforcement rib 8;

[0090] The shielding plate reinforcing rib 8 is welded to the second side surface of the horizontal shielding plate 101 along a direction parallel to the vertical shielding plate 102 .

[0091] In this embodiment, since high-temperature spraying is usually used when spraying thermal barrier coatings on turbine blades, in order to prevent the shielding member from being deformed by high temperature, shielding plate reinforcement ribs are welded on the horizontal shielding plate to increase the strength and rigidity of the vertical shielding plate.

[0092] Specifically, the length of the shielding plate reinforcement rib may be the same as the length of the horizontal shielding plate.

[0093] Specifically, the shielding plate reinforcement ribs may include reinforcement ribs with a circular cross section.

[0094] In an embodiment of the present invention, the shielding plate reinforcement rib 9 and the connecting rod 301 are integrally formed, which can reduce the number of connections between components and reduce the difficulty of assembling the turbine blade fixture.

[0095] In order to improve the strength and rigidity of the positioning rod, Figure 8 As shown, in one embodiment of the present invention, the turbine blade fixture further comprises: at least one positioning rod reinforcement rib 9;

[0096] One end of the positioning rod reinforcement rib 9 is connected to the connecting rod 301 , and the other end of the positioning rod reinforcement rib 9 is connected to the positioning rod 3023 .

[0097] In this embodiment, in order to prevent the positioning rod from being deformed due to excessive external force when embedded in the turbine blade, or to prevent the shielding member from being deformed after being exposed to high temperature and generating a certain pulling force on the positioning rod embedded in the turbine blade, causing the positioning rod to be deformed due to force, a positioning rod reinforcement rib can be provided between the positioning rod and the connecting rod to prevent the positioning rod from being distorted due to uneven force.

[0098] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the existence of other identical factors in the process, method, article or device including the elements.

[0099] Finally, it should be noted that the above is only a preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A gas turbine blade fixture, used to mask the cooling holes on the gas turbine blades during the gas turbine blade spraying process, characterized in that: include: A shielding member (1), at least two embedded toes (2) and a fixing member (3); The at least two embedded toes (2) are connected to the shielding member (1); One end of the fixing member (3) is connected to one end of the shielding member (1); When the at least two embedded toes (2) are respectively embedded in at least two matching cooling holes on the gas turbine moving blade, the shielding member (1) fits with the outlet edge of the gas turbine moving blade to shield each of the cooling holes located on the outlet edge of the gas turbine moving blade, and the other end of the fixing member (3) is connected to the gas turbine moving blade to limit the relative position of the shielding member (1) and the gas turbine moving blade.

2. The gas turbine rotor blade fixture according to claim 1, characterized in that: The fixing member (3) comprises: a connecting rod (301) and a positioning member (302); The first end of the connecting rod (301) is connected to one end of the shielding member (1), and the second end of the connecting rod (301) is connected to the positioning member (302); When the at least two embedded toes (2) are respectively embedded in at least two matching cooling holes on the gas turbine rotor blade, the positioning member (302) is connected to the gas turbine rotor blade.

3. The gas turbine rotor blade fixture according to claim 2, characterized in that: The positioning member (302) comprises: a first bolt (3021), a first nut (3022) and a positioning rod (3023); The first nut (3022) is welded to the second end of the connecting rod (301); The positioning rod (3023) is connected to the connecting rod (301); When the at least two embedded toes (2) are respectively embedded in at least two matching cooling holes on the gas turbine rotor blade, the positioning rod (3023) is embedded in the positioning hole on the gas turbine rotor blade, and the first bolt (3021) is threadedly connected to the first nut (3022) and then threadedly connected to the first threaded hole on the gas turbine rotor blade.

4. The gas turbine rotor blade fixture according to claim 1, characterized in that: The gas turbine rotor blade fixture further comprises: a shielding tail plate and a blade root reinforcement (4); The shielding tail plate is connected to the blade root of the gas turbine rotor blade; One end of the blade root reinforcement (4) is connected to the shielding tail plate, and the other end of the blade root reinforcement (4) is connected to the shielding member (1) to limit the relative position between the shielding member (1) and the gas turbine rotor blade.

5. The gas turbine rotor blade fixture according to claim 4, characterized in that: The blade root reinforcement (4) comprises: a U-shaped rigid structural member (5), a second bolt (6) and a second nut; One end of the U-shaped rigid structural member (5) is connected to the shielding member (1), and the other end of the U-shaped rigid structural member (5) is welded with the second nut; When the at least two embedded toes (2) are respectively embedded in at least two matching cooling holes on the gas turbine rotor blade, the second bolt (6) is threadedly connected to the second nut and then connected to the second threaded hole on the shielding tail plate.

6. The gas turbine rotor blade fixture according to claim 2, characterized in that: The shielding member (1) comprises: a horizontal shielding plate (101) and a vertical shielding plate (102); The horizontal shielding plate (101) and the vertical shielding plate (102) are both rectangular flat plate structures; One edge of the horizontal shielding plate (101) is vertically connected to the vertical shielding plate (102) to form a rod-shaped structure with a T-shaped cross section; The at least two embedded toes (2) are both located on the first side of the horizontal shielding plate (101), and the root of each embedded toe (2) is connected to the connection between the first side of the horizontal shielding plate (101) and the vertical shielding plate (102).

7. The gas turbine rotor blade fixture according to claim 6, characterized in that: The gas turbine rotor blade fixture further comprises: a shielding plate reinforcement rib (8); The shielding plate reinforcing rib (8) is welded to the second side surface of the horizontal shielding plate (101) in a direction parallel to the vertical shielding plate (102).

8. The gas turbine rotor blade fixture according to claim 7, characterized in that: The shielding plate reinforcement rib (8) and the connecting rod (301) are integrally formed.

9. The gas turbine rotor blade fixture according to claim 3, characterized in that: The gas turbine rotor blade fixture further comprises: at least one positioning rod reinforcing rib (9); One end of the positioning rod reinforcement rib (9) is connected to the connecting rod (301), and the other end of the positioning rod reinforcement rib (9) is connected to the positioning rod (3023).

10. The gas turbine rotor blade fixture according to any one of claims 2, 3, 6 to 9, characterized in that: The curvature of the connecting rod (301) is the same as the curvature of the gas turbine rotor blade.

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