A blade crown shielding device for blade parts

Abstract

The present invention provides a blade crown shielding device for blade-like parts, which includes a first shielding member and a second shielding member; the second shielding member is detachably connected to the first shielding member, and the second shielding member and the first shielding member together enclose a storage space for accommodating parts; the first shielding member is provided with a first hollow area, and the first hollow area connects the storage space with the outside world; the second shielding member is provided with a second hollow area, and the second hollow area connects the storage space with the outside world; when the blade crown shielding device for blade-like parts shields the parts, the first joint surface of the parts extends out of the storage space through the first hollow area, and the second joint surface of the parts extends out of the storage space through the second hollow area. Compared with the prior art, the blade crown shielding device for blade-like parts provided by the present invention has a simpler clamping process, can improve production efficiency, reduce labor costs, and can meet the needs of automated mass production.

Description

Technical Field

[0001] The invention relates to the technical field of parts processing and manufacturing, and in particular to a blade crown shielding device for blade parts. Background Art

[0002] As a key equipment in a thermal power plant, the main function of a steam turbine is to convert the heat energy contained in steam into mechanical energy, which in turn drives the generator set to generate electricity. Steam turbine blades are key parts of steam turbines, and are also one of the most delicate and important parts. During the long-term operation of steam turbine blades, they must withstand high temperature, high pressure and high-speed working environments, which makes the blade surface susceptible to corrosion and wear. At the same time, the inside of the blade is also subject to a variety of complex stresses. Due to long-term erosion by high-temperature and high-speed steam, the blade crowns of two adjacent blades have mutual joint surfaces. When the steam turbine blades are assembled, the blade crowns of two adjacent blades are joined to each other. Figures 1 to 3 As shown, a first joint surface 3 and a second joint surface 4 are provided on the blade crown 2 of the blade 1 , and between two adjacent blades, the first joint surface 3 of one blade 1 and the second joint surface 4 of the other blade 1 are joined to each other.

[0003] During the processing, the first joint surface 3 and the second joint surface 4 often need to be further processed. For example, in order to improve the service life and performance of the blade 1, it is often necessary to spray special materials with high temperature resistance, corrosion resistance and wear resistance on different parts (for example, spray special materials on the first joint surface 3 and the second joint surface 4). However, the precise processing of specific areas such as the crown part during the spraying process has always been a technical challenge.

[0004] In the prior art, a manually wrapped, hand-made, custom-made shielding copper plate is often used to shield the positions that do not need to be processed. However, the surface of the blade is easily damaged during the manual clamping process, and the manual clamping process is complicated, the production efficiency is low, and the cost is high, which makes it difficult to meet the needs of automated mass production. Summary of the invention

[0005] In view of the technical problem that in the prior art, when blade parts are processed, a manual shielding copper plate is used to shield the parts, which is easy to cause damage to the parts, and the manual clamping process is complicated, the production efficiency is low, the cost is high, and it is difficult to meet the needs of automated mass production. The present invention provides a blade crown shielding device for blade parts, which is not easy to cause damage to the parts, and the clamping process is simpler, which can improve production efficiency, reduce labor costs, and can meet the needs of automated mass production.

[0006] A blade crown shielding device for blade parts, comprising a first shielding member and a second shielding member;

[0007] The second shielding member is detachably connected to the first shielding member, and the second shielding member and the first shielding member together form a receiving space for receiving parts;

[0008] A first hollow area is formed on the first shielding member, and the first hollow area connects the accommodating space with the outside;

[0009] A second hollow area is formed on the second shielding member, and the second hollow area connects the accommodating space with the outside;

[0010] When the blade crown shielding device shields a blade-like part, the first joint surface of the part extends out of the accommodating space through the first hollow area, and the second joint surface of the part extends out of the accommodating space through the second hollow area.

[0011] Preferably, it also includes a first lofting component;

[0012] The first lofting assembly includes a first lofting box, a first sample and a first fixing member;

[0013] The first lofting box is connected to the first shielding member;

[0014] The first sample is detachably placed in the first placement box;

[0015] The first fixing member is movably disposed on the first placement box to fix the first sample;

[0016] When the blade crown shielding device shields the blade-like part, the exposed surface of the first sample is flush with the first joint surface.

[0017] Preferably, it also includes a second lofting component;

[0018] The second lofting assembly includes a second lofting box, a second sample and a second fixing member;

[0019] The second lofting box is connected to the second shielding member;

[0020] The second sample is detachably placed in the second placement box;

[0021] The second fixing member is movably disposed on the second placement box to fix the second sample;

[0022] When the blade crown shielding device shields the blade-like part, the exposed surface of the second sample is flush with the second joint surface.

[0023] Preferably, when the blade crown shielding device for a blade-like part shields a part, both the first shielding member and the second shielding member are spaced apart from the part.

[0024] Preferably, it further comprises a clamping member, wherein the clamping member is arranged on the first shielding member and / or the second shielding member, and the clamping member comprises a clamping bolt and a copper head;

[0025] The clamping bolt is threadedly connected to the first shielding member or the second shielding member;

[0026] The copper head is arranged at the end of the clamping bolt and is located in the accommodating space to abut against the part.

[0027] Preferably, the first shielding member includes a first shielding plate and a first copper plate;

[0028] The first copper plate is fixed on the first shielding plate;

[0029] The first hollow area is opened in the first copper plate.

[0030] Preferably, the outer surface of the first copper plate near the first hollow area is arranged to be inclined downward outward, and the outer surface of the first shielding plate near the first hollow area is arranged to be inclined downward outward.

[0031] Preferably, the second shielding member comprises a second shielding plate and a second copper plate;

[0032] The second copper plate is fixed on the second shielding plate;

[0033] The second hollow area is opened in the second copper plate.

[0034] Preferably, one end of the accommodating space is open, and the blade crown shielding device of the blade-like part is used to shield one end of the part.

[0035] Preferably, cover plates are respectively provided at the ends of the first shielding member and the second shielding member.

[0036] Compared with the prior art, the blade crown shielding device provided by the present invention comprises a first shielding member and a second shielding member; the second shielding member is detachably connected to the first shielding member, and the second shielding member and the first shielding member together enclose a storage space for storing parts; the first shielding member is provided with a first hollow area, and the first hollow area connects the storage space with the outside world; the second shielding member is provided with a second hollow area, and the second hollow area connects the storage space with the outside world; when the blade crown shielding device shields the parts, the first joint surface of the parts extends out of the storage space through the first hollow area, and the second joint surface of the parts extends out of the storage space through the second hollow area. In the blade crown shielding device, the first shielding member is provided with the first hollow area, and the second shielding member is provided with the second hollow area, so that the first joint surface and the second joint surface of the parts can be exposed after the parts are shielded, ensuring the precise spraying treatment in specific areas such as the blade crown part, and overcoming the defect of the prior art that it is difficult to accurately treat specific areas. Different from the traditional manual covering type hand-made customized shielding copper plate, the blade-like parts crown shielding device uses the detachable first shielding member and the second shielding member to shield the parts, making the clamping process simpler, avoiding the complex process of manual clamping, improving production efficiency, and reducing labor costs. At the same time, the blade-like parts crown shielding device can be reused with other equipment and can meet the needs of automated mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application 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 only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a schematic diagram of the structure of a steam turbine blade;

[0039] Figure 2 for Figure 1 A partial schematic diagram of a steam turbine blade is shown;

[0040] Figure 3 for Figure 1 A partial schematic diagram of a steam turbine blade is shown;

[0041] Figure 4 A schematic diagram of the structure of a blade crown shielding device for blade parts and a steam turbine blade provided in an embodiment;

[0042] Figure 5 for Figure 4 A schematic diagram of the planar structure of the structure shown;

[0043] Figure 6 A schematic diagram of a three-dimensional structure of a first shielding member provided in an embodiment;

[0044] Figure 7 for Figure 6 A schematic diagram of the three-dimensional structure of the first shielding member at another angle;

[0045] Figure 8 A schematic diagram of the three-dimensional structure of a second shielding member provided in an embodiment;

[0046] Fig. 9 for Figure 8 A schematic diagram of the planar structure of the second shielding member is shown;

[0047] Fig.10 A schematic diagram of the three-dimensional structure of a first lofting component provided in an embodiment;

[0048] Fig.11 A schematic diagram of the three-dimensional structure of a second lofting assembly provided in an embodiment;

[0049] Fig.12 A schematic diagram of a three-dimensional structure of a clamping member provided in an embodiment;

[0050] Fig.13 A schematic diagram of the structure of a copper head provided in an embodiment;

[0051] Fig.14 A schematic diagram of a three-dimensional structure of a first shielding plate provided in an embodiment;

[0052] Fig.15 A schematic diagram of a three-dimensional structure of a second shielding plate provided in an embodiment;

[0053] Fig.16 A schematic diagram of the three-dimensional structure of a second copper plate provided in an embodiment. DETAILED DESCRIPTION

[0054] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] It should be noted that when a component is referred to as being "fixed on", "installed on" or "set on" another component, it can be directly on the other component or indirectly set on the other component; when a component is "connected" to another component, or a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0056] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position 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 specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0058] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0059] The present invention provides a blade crown shielding device for blade parts, which includes a first shielding member and a second shielding member; the second shielding member is detachably connected to the first shielding member, and the second shielding member and the first shielding member together enclose a storage space for storing parts; the first shielding member is provided with a first hollow area, and the first hollow area connects the storage space with the outside world; the second shielding member is provided with a second hollow area, and the second hollow area connects the storage space with the outside world; when the blade crown shielding device shields a part, the first joint surface of the part extends out of the storage space through the first hollow area, and the second joint surface of the part extends out of the storage space through the second hollow area. In the blade crown shielding device for blade parts, the first hollow area is provided on the first shielding member, and the second hollow area is provided on the second shielding member, so that the first joint surface and the second joint surface of the part can be exposed after the part is shielded, ensuring accurate spraying treatment in specific areas such as the blade crown part, and overcoming the defect that it is difficult to accurately treat specific areas in the prior art. Different from the traditional manual covering type hand-made customized shielding copper plate, the blade-like parts crown shielding device uses the detachable first shielding member and the second shielding member to shield the parts, making the clamping process simpler, avoiding the complex process of manual clamping, improving production efficiency, and reducing labor costs. At the same time, the blade-like parts crown shielding device can be reused with other equipment and can meet the needs of automated mass production.

[0060] Please refer to Figures 1 to 16 In one embodiment, a blade crown shielding device 100 is provided, which is used to shield the part during the part processing process. Specifically, in one embodiment, the part is a turbine blade 1.

[0061] The blade-like part crown shielding device 100 includes a first shielding member 10 and a second shielding member 20, wherein the second shielding member 20 is detachably connected to the first shielding member 10, and the second shielding member 20 and the first shielding member 10 together enclose a receiving space 30 for receiving the part. A first hollow area 11 is provided on the first shielding member 10, and the first hollow area 11 connects the receiving space 30 with the outside. A second hollow area 21 is provided on the second shielding member 20, and the second hollow area 21 connects the receiving space 30 with the outside. When the blade-like part crown shielding device 100 shields the part, the first joint surface 3 of the part extends out of the receiving space 30 through the first hollow area 11, and the second joint surface 4 of the part extends out of the receiving space 30 through the second hollow area 21.

[0062] That is to say, when the blade crown shielding device 100 of the blade-type part is in use, the first shielding member 10 and the second shielding member 20 jointly shield the part, and the setting position of the first hollow area 11 on the first shielding member 10 matches the position of the first joint surface 3 of the part, and the setting position of the second hollow area 21 on the second shielding member 20 matches the position of the second joint surface 4 of the part, so that the first shielding member 10 and the second shielding member 20 shield the adjacent surfaces on the part that do not need to be sprayed, and only expose the first joint surface 3 and the second joint surface 4 of the part that need to be sprayed with special materials, so as to ensure that special materials are only sprayed on the first joint surface 3 and the second joint surface 4 during the subsequent spraying process, and avoid spraying special materials on other adjacent surfaces on the part.

[0063] It is understandable that in the prior art, before spraying the turbine blades, a manually wrapped, hand-made, custom-made shielding copper plate is used to shield the positions that do not need to be sprayed. This method is prone to damage to the surface of the blades during the manual clamping process, and due to the complex manual clamping process, low production efficiency, and high cost, it is difficult to meet the needs of automated mass production.

[0064] When the blade crown shielding device 100 provided in this embodiment is used, the part can be fixed first, and then the first shielding member 10 and the second shielding member 20 can be mounted on the outside of the part through other equipment, and then the first shielding member 10 and the second shielding member 20 are clamped and fixed. The surface of the part is not easily damaged during the clamping process, thereby protecting the integrity and performance of the blade, and the overall clamping process is simple, which can improve production efficiency and reduce labor costs. After use, the first shielding member 10 and the second shielding member 20 can be disassembled and reused, which can meet the needs of automated mass production.

[0065] It should be noted that the blade crown shielding device 100 can be used not only in the spraying process, but also in any process where the parts need to be shielded. That is to say, when the first joint surface 3 and the second joint surface 4 need to be processed during the processing of the parts, and other surfaces do not need to be processed synchronously, the blade crown shielding device 100 can be used to shield the parts, so that only the first joint surface 3 and the second joint surface 4 are exposed, so as to avoid affecting other surfaces of the parts during the processing, so as to protect the integrity and performance of the blade.

[0066] Specifically, in one embodiment, the detachable connection structure between the first shielding member 10 and the second shielding member 20 can be: through holes are respectively provided at the joints of the first shielding member 10 and the second shielding member 20, and bolts and nuts are provided at the through holes to achieve detachable connection between the two. Of course, in other embodiments, any other desired detachable structure can also be used. In this embodiment, the detachable connection is performed using bolts, which makes disassembly and assembly more convenient.

[0067] Preferably, in one embodiment, the blade crown shielding device 100 further includes a first lofting assembly 40, the first lofting assembly 40 includes a first lofting box 41, a first sample 42 and a first fixing member 43, the first lofting box 41 is connected to the first shielding member 10, the first sample 42 can be detachably placed in the first lofting box 41, the first fixing member 43 is movably arranged on the first lofting box 41, and the first fixing member 43 is used to fix the first sample 42. The first fixing member 43 is movably arranged on the first lofting box 41, which means that the first fixing member 43 can be moved relative to the first lofting box 41, thereby changing the positional relationship between the first fixing member 43 and the first lofting box 41, so as to fasten the first sample 42 in the first lofting box 41 (or loosen the first sample 42 in the first lofting box 41). When the blade crown shielding device 100 shields the part, the exposed surface 421 of the first sample 42 is flush with the first joint surface 3. Among them, the exposed surface 421 of the first sample 42 is flush with the first joint surface 3 means that the exposed surface 421 of the first sample 42 is parallel or substantially parallel to the first joint surface 3. That is to say, when the first sample 42 is placed in the first lofting box 41, at least one side of the first sample 42 is exposed to the outside (i.e., the exposed surface 421), and is not completely shielded by the first lofting box 41. And the setting direction of the exposed surface 421 of the first sample 42 is parallel or substantially parallel to the first joint surface 3. Through the setting of the first lofting component 40, before spraying the first joint surface 3, the exposed surface 421 of the first sample 42 can be pre-sprayed, and after confirming that the spraying effect is good, the first joint surface 3 can be sprayed.

[0068] Preferably, in one embodiment, the first lofting component 40 is disposed on the first shielding member 10 adjacent to the first hollow area 11. For example, in one embodiment, when the first shielding member 10 shields the device, the exposed surface 421 of the first sample 42 is located next to the first joint surface 3.

[0069] Specifically, in one embodiment, a threaded hole is provided on a side of the first lofting box 41 , and the first fixing member 43 is a bolt. The first sample 42 is clamped in the first lofting box 41 by screwing the first fixing member 43 into the threaded hole.

[0070] Specifically, in one embodiment, a fixing plate 411 is disposed on the side of the first lofting box 41, and a first through hole 4111 is disposed on the fixing plate 411. Bolts are inserted into the first through holes 4111 to connect and fix the first lofting box 41 to the first shielding member 10.

[0071] More specifically, in one embodiment, the threaded hole and the fixing plate 411 are located on opposite sides of the first layout box 41, so that the first fixing member 43 and the fixing plate 411 are located on opposite sides of the first layout box 41, thereby facilitating the installation and fixation of the first layout box 41 and the first sample 42. Fig.10 As shown, the threaded hole is located on the right side of the first lofting box 41, and the fixing plate 411 is located on the left side of the first lofting box 41. In one embodiment, four first through holes 4111 are provided, and the four first through holes 4111 are distributed in a rectangular shape.

[0072] Preferably, in one embodiment, the blade crown shielding device 100 further includes a second lofting assembly 50, the second lofting assembly 50 includes a second lofting box 51, a second sample 52 and a second fixing member 53, the second lofting box 51 is connected to the second shielding member 20, the second sample 52 can be detachably placed in the second lofting box 51, the second fixing member 53 is movably arranged on the second lofting box 51, and the second fixing member 53 is used to fix the second sample 52. The second fixing member 53 is movably arranged on the second lofting box 51, which means that the second fixing member 53 can be moved relative to the second lofting box 51, thereby changing the positional relationship between the second fixing member 53 and the second lofting box 51, so as to fasten the second sample 52 in the second lofting box 51 (or loosen the second sample 52 in the second lofting box 51). When the blade crown shielding device 100 shields the part, the exposed surface 521 of the second sample 52 is flush with the second joint surface 4. Among them, the exposed surface 521 of the second sample 52 is flush with the second joint surface 4 means that the exposed surface 521 of the second sample 52 is parallel or substantially parallel to the second joint surface 4. That is to say, when the second sample 52 is placed in the second lofting box 51, at least one side of the second sample 52 is exposed to the outside (i.e., the exposed surface 521), and is not completely shielded by the second lofting box 51. And the setting direction of the exposed surface 521 of the second sample 52 is parallel or substantially parallel to the second joint surface 4. Through the setting of the second lofting component 50, before spraying the second joint surface 4, the exposed surface 521 of the second sample 52 can be pre-sprayed, and after confirming that the spraying effect is good, the second joint surface 4 can be sprayed.

[0073] Preferably, in one embodiment, the second lofting component 50 is disposed on the second shielding member 20 adjacent to the second hollow area 21. For example, in one embodiment, when the second shielding member 20 shields the device, the exposed surface 521 of the second sample 52 is located next to the second joint surface 4.

[0074] Specifically, in one embodiment, a threaded hole is provided on a side of the second lofting box 51 , and the second fixing member 53 is a bolt. The second sample 52 is clamped in the second lofting box 51 by screwing the second fixing member 53 into the threaded hole.

[0075] Specifically, in one embodiment, a second through hole 511 is disposed at the bottom of the second lofting box 51. Bolts are inserted into the second through hole 511, and the second lofting box 51 is connected and fixed to the second shielding member 20 by the bolts.

[0076] More specifically, in one embodiment, four second through holes 511 are provided on the second placement box 41 .

[0077] Preferably, in one embodiment, when the blade crown shielding device 100 shields the part, the first shielding member 10 and the second shielding member 20 are both spaced apart from the part. That is, when the first shielding member 10 and the second shielding member 20 shield the part, there is a gap between the inner surfaces of the first shielding member 10 and the second shielding member 20 and the surface of the part, and they do not directly contact the surface of the part. This prevents the first shielding member 10 and the second shielding member 20 from colliding with the part, causing wear on the surface of the part.

[0078] Specifically, in one embodiment, when the blade crown shielding device 100 shields the blade part, the first shielding member 10, the second shielding member 20 and the peripheral surface of the part form a fixed gap of 1 mm.

[0079] Preferably, in one embodiment, the blade crown shielding device 100 further comprises a clamping member 60, and the clamping member 60 is arranged on the first shielding member 10 and / or the second shielding member 20. The relative position between the first shielding member 10 and / or the second shielding member 20 and the part can be fixed by the arrangement of the clamping member 60, so as to better ensure the accuracy of the position of the part, and also to avoid the first shielding member 10 and / or the second shielding member 20 from accidental movement during spraying, thereby preventing the wear of the part.

[0080] Specifically, in one embodiment, the clamping members 60 are disposed on both the front and rear sides of the first shielding member 10 , and the clamping members 60 are disposed on both the front and rear sides of the second shielding member 20 .

[0081] Preferably, in one embodiment, the clamping member 60 includes a clamping bolt 61 and a copper head 62, and the clamping bolt 61 is threadedly connected to the first shielding member 10 or the second shielding member 20. The copper head 62 is arranged at the end of the clamping bolt 61 and is located in the accommodating space 30 to abut the part. That is, the head of the clamping member 60 used to abut the part is made of copper, which is soft and not easy to scratch the blade surface, and can also achieve the purpose of clamping the blade crown. After the first shielding member 10 and the second shielding member 20 shield the part, the clamping bolt 61 is screwed in so that the copper head 62 can abut the surface of the part, thereby fixing the relative positions of the first shielding member 10, the second shielding member 20 and the part.

[0082] Preferably, in one embodiment, the copper head 62 is provided with an internal thread, and anti-loosening is achieved by spot welding in a manner of destroying the thread, thereby ensuring the reliability of the connection of the copper head 62.

[0083] Preferably, in one embodiment, the first shielding member 10 includes a first shielding plate 12 and a first copper plate 13, wherein the first copper plate 13 is fixed on the first shielding plate 12, and the first hollow area 11 is provided in the first copper plate 13. That is to say, in this embodiment, in the first shielding member 10, at least the first hollow area 11 is provided with a copper plate, and copper has good thermal conductivity, and the first copper plate 13 is provided in the first hollow area 11, so that heat can be dissipated when spraying the coating.

[0084] Specifically, in one embodiment, the first shielding plate 12 is made of non-red copper material, that is, only part of the material of the first shielding member 10 is made of red copper. Since red copper is expensive, the purpose of using part of red copper is to save material costs. More specifically, in one embodiment, the first shielding plate 12 is made of steel plate.

[0085] Specifically, in one embodiment, the first copper plate 13 and the first shielding plate 12 are fixed by welding.

[0086] Preferably, in one embodiment, when the first shielding member 10 shields the part, the first joint surface 3 of the part is at least 2 mm higher than the first copper plate 13, thereby ensuring that the first joint surface 3 is sprayed without dead angles when spraying paint.

[0087] Specifically, in one embodiment, when the blade-like part crown shielding device 100 shields the part, the first shielding member 10 is located above. Preferably, in one embodiment, the outer surface of the first copper plate 13 close to the first hollow area 11 is inclined and descended outward, and the outer surface of the first shielding plate 12 close to the first hollow area 11 is inclined and descended outward. That is to say, when designing, the left and right end surfaces of the first shielding plate 12 and the first copper plate 13 should be lower than the spraying center to form a slope so that the paint flows out to both sides. For example, the outer surface of the first copper plate 13 close to the first hollow area 11 is the first surface 131, and the outer surface of the first shielding plate 12 close to the first hollow area 11 is the second surface 121. From the direction close to the first hollow area 11 to the direction away from the first hollow area 11, the heights of the first surface 131 and the second surface 121 gradually decrease, so that when the paint falls into the first copper plate 13 and the first shielding plate 12, the paint can be guided to flow outward to avoid paint accumulation, and at the same time, the paint is prevented from flowing into the accommodating space 30 from the gap at the edge of the first hollow area 11, affecting other surfaces of the part.

[0088] Specifically, in one embodiment, the first copper plate 13 has a complex curved surface, the middle portion is hollowed out and a 1 mm gap is maintained with the part, thereby ensuring space for thermal expansion, and at the same time, the middle portion is high and the surrounding portions are low, thereby ensuring that the sprayed paint does not accumulate around.

[0089] Specifically, in one embodiment, the clamping member 60 is disposed on the first shielding plate 12 .

[0090] Preferably, in one embodiment, a hollow structure is provided on the first shielding plate 12 to reduce the overall weight of the entire device.

[0091] Preferably, in one embodiment, the second shielding member 20 includes a second shielding plate 22 and a second copper plate 23, the second copper plate 23 is fixed on the second shielding plate 22, and the second hollow area 21 is opened in the second copper plate 23. That is to say, in this embodiment, in the second shielding member 20, at least the second hollow area 21 is made of copper, and copper has good thermal conductivity. By using the second copper plate 23 in the second hollow area 21, heat can be dissipated when spraying paint.

[0092] Specifically, in one embodiment, the second shielding plate 22 is made of non-red copper material, that is, only part of the second shielding member 20 is made of red copper. Since red copper is expensive, the purpose of using part of red copper is to save material costs. More specifically, in one embodiment, the second shielding plate 22 is made of steel plate.

[0093] It is understandable that in the prior art, all materials of the custom-made shielding copper plates are made of the same expensive material, while in an embodiment, the first shielding member 10 and the second shielding member 20 significantly reduce the material cost and overcome the problem of high manual operation cost in the prior art.

[0094] Specifically, in one embodiment, the second shielding plate 22 and the second copper plate 23 are welded and fixed to each other.

[0095] Preferably, in one embodiment, a hollow structure is provided on the second shielding plate 22 to reduce the overall weight of the entire device.

[0096] Specifically, in one embodiment, the clamping member 60 is disposed on the second shielding plate 22 .

[0097] Specifically, in one embodiment, four first positioning through holes are disposed on the second shielding plate 22 , and the second lofting assembly 50 is disposed at the first positioning through holes.

[0098] Specifically, in one embodiment, through holes are respectively provided at the joints of the first shielding plate 12 and the second shielding plate 22. After the first shielding plate 12 and the second shielding plate 22 are covered, bolts are inserted into the through holes, and the first shielding plate 12 and the second shielding plate 22 are detachably connected and fixed by bolts and nuts.

[0099] Preferably, in one embodiment, one end of the accommodating space 30 is open, and the blade-like part crown shielding device 100 is used to shield one end of the part. That is to say, in this embodiment, the blade-like part crown shielding device 100 does not completely shield the part, but only shields one end of the part, thereby reducing the size of the blade-like part crown shielding device 100 and making the processing difficulty lower. At the same time, when using the blade-like part crown shielding device 100, since a part of the part is located outside the blade-like part crown shielding device 100, the other parts on the part can be fixed by an additional clamp to ensure that the part will not move accidentally in the subsequent process. Specifically, in one embodiment, the blade-like part crown shielding device 100 is used to shield this end of the crown 2 of the part.

[0100] Preferably, in one embodiment, cover plates are respectively provided at the ends of the first shielding member 10 and the second shielding member 20, and the cover plates are mainly used to prevent the sprayed material from splashing onto other parts of the blade crown.

[0101] Specifically, in one embodiment, a first cover plate 14 is disposed at an open end of the first shielding plate 12 away from the accommodating space 30 , and the first cover plate 14 and the first shielding plate 12 are welded to each other.

[0102] Specifically, in one embodiment, four second positioning through holes are disposed on the first cover plate 14 , and the first lofting assembly 40 is disposed at the second positioning through holes.

[0103] Specifically, in one embodiment, a second cover plate 24 is disposed at one end of the second shielding plate 22 that is open away from the accommodating space 30 , and the second cover plate 24 and the second shielding plate 22 are welded to each other.

[0104] Specifically, in one embodiment, the blade-like part hood shielding device 100 is mainly used in the processing of large blades, and the blade-like part hood shielding device 100 is a large blade-like part hood shielding device.

[0105] When spraying the parts, first clamp and fix the parts with a clamp, then cover the first shielding plate 12 and the second shielding plate 22 on the end of the blade crown 2 of the parts, cover the first shielding plate 12 and the second shielding plate 22, and tighten the 6 bolts and nuts around. Then screw in the 24 clamping parts 60 set on the first shielding plate 12 and the second shielding plate 22 until the copper head 62 presses against the blade body to achieve the clamping purpose. Then pre-spray the first lofting component 40 and the second lofting component 50, and after confirming the spraying effect, spray the first joint surface 3 and the second joint surface 4 of the parts.

[0106] It is particularly noteworthy that in this invention design, a special study was conducted on large titanium alloy blades. The special properties of titanium alloy blades make it impossible for them to come into direct contact with conventional iron steel plates, otherwise scratches may occur. However, the applicant found that red copper not only has excellent compatibility with titanium alloys, but also has excellent heat dissipation properties, making it an ideal shield during supersonic flame spraying, which greatly reduces the thermal load of the spraying.

[0107] The blade crown shielding device 100 solves the defects of the prior art, such as the difficulty in accurately processing specific areas during the blade spraying process, the easy damage to the blade by manual clamping, the low production efficiency and the high cost, improves the spraying efficiency, reduces the processing cost, and meets the needs of automated mass production. It greatly reduces the manual operation time, ensures the accuracy of spraying, reduces the damage to the blade surface, and the standardized design makes it easy to integrate into the automated production line.

[0108] It is understandable that the design precision of steam turbine blades is very high, and their surface shape and finish directly affect the flow characteristics of the airflow. If the wear-resistant material is sprayed onto other parts of the blade, especially on the key airflow channels, the thickness of the coating may change the surface profile and smoothness of the blade, thereby destroying its aerodynamic characteristics. This surface irregularity will lead to a decrease in fluid dynamics performance, cause airflow turbulence, reduce efficiency, and even increase vortices and resistance, affecting the working efficiency of the entire steam turbine. In addition, the presence of the coating will change the heat transfer characteristics of certain parts of the blade. The coating may play a certain role in heat insulation, which may reduce local heat conduction in locations where efficient heat exchange is required (such as certain cooling paths or heat dissipation parts), affect the overall cooling effect of the blade, and cause overheating or even deterioration of material properties. The blade crown shielding device 100 provided in this embodiment can well shield the blade during the spraying process to prevent the material from being sprayed onto other surfaces of the blade to ensure the performance of the blade.

[0109] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A blade crown shielding device for blade parts, characterized in that: comprising a first shielding member and a second shielding member; The second shielding member is detachably connected to the first shielding member, and the second shielding member and the first shielding member together form a receiving space for receiving parts; A first hollow area is formed on the first shielding member, and the first hollow area connects the accommodating space with the outside; A second hollow area is formed on the second shielding member, and the second hollow area connects the accommodating space with the outside; When the blade crown shielding device shields a blade-like part, the first joint surface of the part extends out of the accommodation space through the first hollow area, and the second joint surface of the part extends out of the accommodation space through the second hollow area; Also included is a first lofting assembly; The first lofting assembly includes a first lofting box, a first sample and a first fixing member; The first lofting box is connected to the first shielding member; The first sample is detachably placed in the first placement box; The first fixing member is movably disposed on the first placement box to fix the first sample; When the blade crown shielding device shields the blade-like part, the exposed surface of the first sample is flush with the first joint surface; It also includes a clamping member, which is arranged on the first shielding member and / or the second shielding member, and includes a clamping bolt and a copper head; The clamping bolt is threadedly connected to the first shielding member or the second shielding member; The copper head is arranged at the end of the clamping bolt and is located in the accommodation space to abut against the part; The first shielding member includes a first shielding plate and a first copper plate; The first copper plate is fixed on the first shielding plate; The first hollow area is opened on the first copper plate; The outer surface of the first copper plate near the first hollow area is arranged to be inclined downward outward, and the outer surface of the first shielding plate near the first hollow area is arranged to be inclined downward outward.

2. The blade crown shielding device according to claim 1 is characterized in that: Also included is a second lofting assembly; The second lofting assembly includes a second lofting box, a second sample and a second fixing member; The second lofting box is connected to the second shielding member; The second sample is detachably placed in the second placement box; The second fixing member is movably disposed on the second placement box to fix the second sample; When the blade crown shielding device shields the blade-like part, the exposed surface of the second sample is flush with the second joint surface.

3. The blade crown shielding device according to claim 1, characterized in that: When the blade-like part crown shielding device shields a part, the first shielding member and the second shielding member are both spaced apart from the part.

4. The blade crown shielding device according to claim 1, characterized in that: The second shielding member includes a second shielding plate and a second copper plate; The second copper plate is fixed on the second shielding plate; The second hollow area is opened in the second copper plate.

5. The blade crown shielding device of blade parts according to claim 1, characterized in that: One end of the accommodating space is open, and the blade crown shielding device of the blade-like part is used to shield one end of the part.

6. The blade crown shielding device of blade parts according to claim 1, characterized in that: Cover plates are respectively disposed at the ends of the first shielding member and the second shielding member.

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