A blade root shielding device for blade-like parts

Abstract

This invention provides a blade root shielding device for blade-like parts, comprising a base plate, guide baffles, a fixed-end clamping assembly, a movable-end clamping assembly, and a self-locking component. The guide baffles include a first guide baffle and a second guide baffle, which are respectively disposed on the base plate and spaced apart from each other. A first conforming curved surface is provided on the inner side of the first guide baffle, and a second conforming curved surface is provided on the inner side of the second guide baffle. The fixed-end clamping assembly is disposed at one end of the first and second guide baffles. The movable-end clamping assembly is movably disposed at the other end of the first and second guide baffles. The self-locking component is detachably connected to the movable-end clamping assembly. An anti-falling baffle is also provided on the inner side of the first and / or second guide baffles. Compared with the prior art, the blade root shielding device for blade-like parts provided by this invention is easy to assemble and disassemble, and can better prevent blades from accidentally falling off.

Description

Technical Field

[0001] This invention relates to the field of parts processing and manufacturing technology, and in particular to a blade root shielding device for blade-type parts. Background Technology

[0002] Gas turbines and steam turbines are power machines that convert energy from nature into mechanical energy to perform work. Blades are used in both gas turbines and steam turbines. As key components, blades must withstand high temperatures, high pressures, and high speeds during long-term operation. A blade typically consists of a root, blade body, and blade tip. During blade manufacturing, the blade body usually undergoes sandblasting to improve its mechanical properties. The blade root, however, has a precise assembly structure and strict dimensional tolerances. During sandblasting, it is crucial to avoid impacts from sand particles on the blade root; otherwise, damage to the mating surfaces and dimensional deviations may occur, severely affecting the blade's assembly quality and service life.

[0003] An existing technology provides a sandblasting and shielding device for stationary blades, which consists of two guide baffles, two clamping baffles, two wedges, and one base plate. The guide baffles are fixed to the base plate with bolts. The clamping end consists of bolts, wedges, and clamping baffles. The principle is that the movement of the bolts pushes the wedges, thereby pressing against the blade root and shielding it.

[0004] However, existing shielding devices use multiple bolts to clamp the blades, which makes disassembly and assembly inconvenient. Furthermore, the bolts are prone to locking under prolonged high-temperature sandblasting conditions, further increasing the difficulty of disassembly. Additionally, current shielding devices also have the problem of blades easily falling off during rotation. Summary of the Invention

[0005] To address the technical problems of inconvenient assembly and disassembly of existing shielding devices, and the tendency for blades to fall off during clamping, this invention provides a blade root shielding device for blade-type parts. This device features two guide baffles, with a fixed clamping assembly at one end and a movable clamping assembly at the other. The movable clamping assembly is connected to a self-locking component. During blade assembly and disassembly, simply unlocking the self-locking component moves the movable clamping assembly, simplifying the blade insertion and removal process. Furthermore, an anti-fall-off baffle can be installed on the inner side of the guide baffles to restrict vertical movement of the blade root, preventing blades from falling off due to accidental flipping of the base plate.

[0006] A blade root shielding device for blade-type parts includes a base plate, a guide baffle, a fixed end clamping assembly, a movable end clamping assembly, and a self-locking component.

[0007] The guide baffle includes a first guide baffle and a second guide baffle. The first guide baffle and the second guide baffle are respectively disposed on the base plate and spaced apart from each other to form a leaf root receiving space. The inner side of the first guide baffle is provided with a first fitting curved surface that matches the top area of ​​one side of the leaf root, and the inner side of the second guide baffle is provided with a second fitting curved surface that matches the top area of ​​the other side of the leaf root.

[0008] The fixed end clamping assembly is disposed at one end of the first guide baffle and the second guide baffle, and is used to abut against one end face of the leaf root;

[0009] The movable end clamping assembly is movably disposed at the other end of the first guide baffle and the second guide baffle, and is used to abut against the other end face of the leaf root;

[0010] The self-locking component is disposed on the base plate or the guide baffle and is detachably connected to the movable end clamping assembly, so as to lock the movable end clamping assembly to the other end of the first guide baffle and the second guide baffle.

[0011] An anti-drop baffle is also provided on the inner side of the first guide baffle and / or the second guide baffle. After the leaf root is inserted into the leaf root receiving space, the anti-drop baffle extends into the groove on the side of the leaf root, and the anti-drop baffle and the side of the leaf root are spaced apart from each other.

[0012] Preferably, the inner side of the first guide baffle is provided with a first protrusion, the first protrusion is located at the top of the inner surface of the first guide baffle, and the inner surface of the first protrusion is the first fitting curved surface.

[0013] The inner side of the second guide baffle is provided with a second protrusion, the second protrusion is located at the top of the inner surface of the second guide baffle, and the inner surface of the second protrusion is the second fitting curved surface.

[0014] Preferably, the top surface of the first protrusion is a curved surface that matches the top area of ​​one side of the leaf root, and the height of the top surface of the first protrusion is lower than the height of the top surface of the leaf root.

[0015] The top surface of the second protrusion is a curved surface that matches the top area of ​​the other side of the leaf root, and the height of the top surface of the second protrusion is lower than the height of the top surface of the leaf root.

[0016] Preferably, the anti-fall-off baffle is provided on the inner side of both the first guide baffle and the second guide baffle;

[0017] The inner side of the first guide baffle is provided with a first anti-drop baffle threaded hole, and the anti-drop baffle is installed at the first anti-drop baffle threaded hole through a threaded connector;

[0018] The inner side of the second guide baffle is provided with a second anti-drop baffle threaded hole, and the anti-drop baffle is installed at the second anti-drop baffle threaded hole through a threaded connector.

[0019] Preferably, the fixed end clamping assembly includes a fixed end baffle and a fixed end wedge;

[0020] The fixed end baffle is connected to the first guide baffle and the second guide baffle on both sides respectively;

[0021] The fixed end wedge is connected to the fixed end baffle, and the surface of the fixed end wedge away from the fixed end baffle matches one end face of the leaf root.

[0022] The movable end clamping assembly includes a movable end baffle and a movable end wedge;

[0023] The movable end baffle is detachably connected to the self-locking component;

[0024] The movable end wedge is connected to the movable end baffle, and the surface of the movable end wedge on the side away from the movable end baffle matches the other end face of the leaf root.

[0025] Preferably, the inner surface of the fixed end baffle is provided with a first groove, and the fixed end wedge is provided with a first positioning protrusion that matches the first groove on the side near the fixed end baffle, and the first positioning protrusion is engaged in the first groove;

[0026] The inner surface of the movable end baffle is provided with a second groove, and the movable end wedge is provided with a second positioning protrusion that matches the second groove, and the second positioning protrusion is engaged in the second groove.

[0027] Preferably, the two sides of the fixed end baffle are connected to the first guide baffle and the second guide baffle respectively by fixing bolts;

[0028] A connecting threaded hole is provided on the side of the fixed end wedge block near the fixed end baffle. An adjusting bolt is provided between the fixed end baffle and the fixed end wedge block. The rod of the adjusting bolt passes through the fixed end baffle and is threaded to the connecting threaded hole.

[0029] Preferably, the fixed end baffle is provided with a clearance hole corresponding to the fixed bolt and the adjusting bolt, and the width of the clearance hole is greater than the diameter of the bolt shank and less than the diameter of the bolt head;

[0030] The clearance hole extends along the height direction of the fixed end baffle so that the fixed end baffle can be lifted and moved along the height direction after the bolt is loosened.

[0031] Preferably, the fixed end baffle is provided with a sand blowing hole.

[0032] Preferably, the self-locking component includes a fixing plate, a handle, a locking housing, a hook, a spring bracket, and a spring;

[0033] The fixing plate is fixedly mounted on the base plate or the guide baffle;

[0034] One end of the handle is rotatably connected to the fixed plate;

[0035] One end of the latch housing is hinged to the middle of the handle;

[0036] The hook is located outside the other end of the locking housing and is used to detachably connect to the movable end clamping assembly;

[0037] The spring bracket is located inside the latch housing and is connected to the hook;

[0038] The spring is positioned between the other end of the latch housing and the spring bracket;

[0039] The handle has an unlocked state and a locked state in which the latch housing is pulled down after being rotated relative to the fixed plate. In the locked state, the latch housing compresses the spring, and the protrusion at the end of the handle abuts against the back of the spring bracket.

[0040] Compared with the prior art, the blade root shielding device for blade-like parts provided by the present invention includes a base plate, a guide baffle, a fixed end clamping assembly, a movable end clamping assembly, and a self-locking component; the guide baffle includes a first guide baffle and a second guide baffle, which are respectively disposed on the base plate and spaced apart to form a blade root accommodating space; the inner side of the first guide baffle is provided with a first fitting curved surface that matches the top area of ​​one side of the blade root, and the inner side of the second guide baffle is provided with a second fitting curved surface that matches the top area of ​​the other side of the blade root; the fixed end clamping assembly is disposed on the first guide baffle and the second guide baffle. One end of the baffle is used to abut against one end face of the blade root; the movable end clamping assembly is movably disposed at the other end of the first guide baffle and the second guide baffle, and is used to abut against the other end face of the blade root; the self-locking member is disposed on the base plate or the guide baffle and is detachably connected to the movable end clamping assembly, so as to lock the movable end clamping assembly at the other end of the first guide baffle and the second guide baffle; an anti-drop baffle is also provided on the inner side of the first guide baffle and / or the second guide baffle. After the blade root is inserted into the blade root receiving space, the anti-drop baffle extends into the groove on the side of the blade root, and the anti-drop baffle is spaced apart from the side of the blade root. The blade root shielding device of the blade-like parts is provided with the fixed end clamping assembly and the movable end clamping assembly. In use, only one end of the movable end clamping assembly needs to be disassembled and installed, thereby reducing the difficulty of disassembly and assembly and improving efficiency; and the self-locking member is used to clamp the movable end clamping assembly, the clamping effect is stable, and the operation is very convenient. Furthermore, an anti-fall-off baffle is also provided on the inner side of the guide baffle. When the base plate flips over, the anti-fall-off baffle can hold the blade root in place, thereby preventing the blade from falling off and improving the reliability of blade installation. At the same time, under normal circumstances, the anti-fall-off baffle will not come into contact with the blade root, thereby avoiding damage to the blade root. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the end face structure of the leaf root in one embodiment;

[0043] Figure 2 A three-dimensional structural schematic diagram of a blade root shielding device for a blade-type part provided in one embodiment;

[0044] Figure 3 A top view of a blade root shielding device for a blade-like component according to one embodiment;

[0045] Figure 4 A three-dimensional structural schematic diagram of a first guide baffle provided in one embodiment;

[0046] Figure 5 for Figure 4 The front view of the first guide baffle is shown below;

[0047] Figure 6 for Figure 4 Top view of the first guide baffle shown;

[0048] Figure 7 A three-dimensional structural schematic diagram of a second guide baffle provided in one embodiment;

[0049] Figure 8 for Figure 7 The front view of the second guide baffle is shown below;

[0050] Figure 9 for Figure 7 Top view of the second guide baffle shown;

[0051] Figure 10 A top view of an anti-fall-off baffle provided in one embodiment;

[0052] Figure 11 A three-dimensional structural schematic diagram of a fixed end baffle provided in one embodiment;

[0053] Figure 12 A three-dimensional structural schematic diagram of a fixed-end wedge block provided in one embodiment;

[0054] Figure 13 A schematic diagram of the planar structure of a self-locking component provided in one embodiment (in a locked state);

[0055] Figure 14 A three-dimensional structural schematic diagram of a movable end baffle provided in one embodiment;

[0056] Explanation of reference numerals in the attached figures:

[0057] The blade-type parts include a blade root shielding device 100, a base plate 10, a guide baffle 20, a first guide baffle 21, a first mating surface 211, a first protrusion 212, a top surface of the first protrusion 2121, a first fixing threaded hole 213, a first positioning pin hole 214, a first anti-drop baffle threaded hole 215, a first mounting threaded hole 216, a second guide baffle 22, a second mating surface 221, a second protrusion 222, a top surface of the second protrusion 2221, a second fixing threaded hole 223, a second anti-drop baffle threaded hole 224, a blade root accommodating space 23, a fixed end clamping assembly 30, and a fixed end stop. Plate 31, first groove 311, clearance hole 312, fixed end wedge 32, first positioning protrusion 321, connecting threaded hole 322, movable end clamping assembly 40, movable end baffle 41, second groove 411, locking bracket 412, movable end wedge 42, second positioning protrusion 421, self-locking component 50, fixed plate 51, mounting base 511, handle 52, protrusion 521, locking housing 53, limiting groove 531, hook 54, spring bracket 55, limiting post 551, spring 56, pivot pin 57, anti-falling baffle 60, mounting part 61, limiting part 62, fixing bolt 70, adjusting bolt 80;

[0058] Leaf root 200, side 210, top area 2101, groove 2102, protruding part 2103, end face 220. Detailed Implementation

[0059] 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 a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] It should be noted that when a component is referred to as being "fixed to", "mounted to", or "set on" another component, it can be directly on 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 or indirectly connected to the other component.

[0061] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying 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 this application, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0063] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0064] This invention provides a blade root shielding device for blade-like parts, comprising a base plate, a guide baffle, a fixed end clamping assembly, a movable end clamping assembly, and a self-locking component; the guide baffle includes a first guide baffle and a second guide baffle, which are respectively disposed on the base plate and spaced apart to form a blade root accommodating space; the inner side of the first guide baffle is provided with a first conforming curved surface matching the top area of ​​one side of the blade root, and the inner side of the second guide baffle is provided with a second conforming curved surface matching the top area of ​​the other side of the blade root; the fixed end clamping assembly is disposed on the first guide baffle and the second guide baffle. One end is used to abut against one end face of the blade root; the movable end clamping assembly is movably disposed at the other end of the first guide baffle and the second guide baffle, and is used to abut against the other end face of the blade root; the self-locking member is disposed on the base plate or the guide baffle and is detachably connected to the movable end clamping assembly, and is used to lock the movable end clamping assembly at the other end of the first guide baffle and the second guide baffle; the inner side of the first guide baffle and / or the second guide baffle is also provided with an anti-drop baffle. After the blade root is inserted into the blade root receiving space, the anti-drop baffle extends into the groove on the side of the blade root, and the anti-drop baffle is spaced apart from the side of the blade root. The blade root shielding device of the blade-like parts is provided with the fixed end clamping assembly and the movable end clamping assembly. In use, only one end of the movable end clamping assembly needs to be disassembled and installed, thereby reducing the difficulty of disassembly and assembly and improving efficiency; and the self-locking member is used to clamp the movable end clamping assembly, the clamping effect is stable, and the operation is very convenient. Furthermore, an anti-fall-off baffle is also provided on the inner side of the guide baffle. When the base plate flips over, the anti-fall-off baffle can hold the blade root in place, thereby preventing the blade from falling off and improving the reliability of blade installation. At the same time, under normal circumstances, the anti-fall-off baffle will not come into contact with the blade root, thereby avoiding damage to the blade root.

[0065] Please refer to the following: Figures 1 to 14 In one embodiment, a blade root shielding device 100 for blade-like parts is provided, used to shield the blade root during the processing of the blade-like parts. Further, in one embodiment, the blade root shielding device 100 is used to shield the blade root during sandblasting of the blade body of the blade-like part, preventing the blade root from being impacted by sand particles and affecting the assembly quality and service life of the blade-like part. Specifically, in one embodiment, the blade root shielding device 100 is used to shield the blade root of a moving blade. More specifically, in one embodiment, the blade root shielding device 100 is used to shield the blade root of a moving blade in a multi-stage moving blade used in a gas turbine / steam turbine.

[0066] The blade root shielding device 100 for the blade-like parts includes a base plate 10, a guide baffle 20, a fixed end clamping assembly 30, a movable end clamping assembly 40, and a self-locking component 50. The guide baffle 20 includes a first guide baffle 21 and a second guide baffle 22, which are respectively disposed on the base plate 10 and spaced apart to form a blade root accommodating space 23. That is, the first guide baffle 21 and the second guide baffle 22 are disposed at different positions on the base plate 10, and are spaced apart from each other, thereby forming a blade root accommodating space 23 between the first guide baffle 21 and the second guide baffle 22 that can accommodate the blade root 200. The inner side of the first guide baffle 21 is provided with a first fitting surface 211 that matches the top region 2101 of one side surface 210 of the blade root 200, and the inner side of the second guide baffle 22 is provided with a second fitting surface 221 that matches the top region 2101 of the other side surface 210 of the blade root 200. Wherein: the inner side of the first guide baffle 21 refers to the side of the first guide baffle 21 facing the leaf root receiving space 23; similarly, the inner side of the second guide baffle 22 refers to the side of the second guide baffle 22 facing the leaf root receiving space 23; the first fitting surface 211 matching the top area 2101 of one side surface 210 of the leaf root 200 means that the shape, size, etc. of the first fitting surface 211 are fitted and matched with the surface of the top area 2101 of one side surface 210 of the leaf root 200, so that when the leaf root 200 is inserted into the leaf root receiving space 23, the first fitting surface 211 can accurately fit on one side surface 210 of the leaf root 200. The top region 2101 of the leaf root 200 prevents substances from flowing into the leaf root receiving space 23 and affecting the leaf root 200. Similarly, the matching of the second fitting surface 221 with the top region 2101 of the other side surface 210 of the leaf root 200 means that the shape and size of the second fitting surface 221 are fitted to the surface of the top region 2101 of the other side surface 210 of the leaf root 200. Therefore, when the leaf root 200 is inserted into the leaf root receiving space 23, the second fitting surface 221 can precisely fit the top region 2101 of the other side surface 210 of the leaf root 200, preventing substances from flowing into the leaf root receiving space 23 and affecting the leaf root 200. The top region 2101 of the leaf root 200 is the area on the leaf root 200 near the leaf body, which is the transition area between the leaf root 200 and the leaf body.

[0067] The fixed-end clamping assembly 30 is disposed at one end of the first guide baffle 21 and the second guide baffle 22, and abuts against one end face 220 of the blade root 200. The movable-end clamping assembly 40 is movably disposed at the other end of the first guide baffle 21 and the second guide baffle 22, and abuts against the other end face 220 of the blade root 200. The movable-end clamping assembly 40 being movably disposed at the other end of the first guide baffle 21 and the second guide baffle 22 means that it can be moved and disassembled relative to the first guide baffle 21 and the second guide baffle 22, so that during installation, the blade can insert the blade root 200 into the blade root receiving space 23 through this end. Furthermore, the fixed-end clamping assembly 30 means that under normal circumstances, during blade installation and removal, this end of the component is fixed, and the fixed-end clamping assembly 30 can achieve blade insertion and removal without disassembly, and this end of the component does not affect the normal installation and removal of the blade.

[0068] The self-locking component 50 is disposed on the base plate 10 or the guide baffle 20 and is detachably connected to the movable end clamping assembly 40 to lock the movable end clamping assembly 40 to the other end of the first guide baffle 21 and the second guide baffle 22. The self-locking component 50 refers to a component with an internal self-locking structure that can self-lock to restrict its own position. Through the self-locking of its own position, the movable end clamping assembly 40 is restricted in position, thereby ensuring that the movable end clamping assembly 40 is tightly pressed against the end face 220 of the blade root 200, clamping the blade root 200.

[0069] Before using the blade root shielding device 100 for the blade-type parts, the guide baffle 20 must first be fixed to the base plate 10, and then the fixed end clamping assembly 30 and the self-locking component 50 must be installed in sequence (the above components do not need to be disassembled when replacing the blade and can work for a long time). When needed, the blade root 200 must be inserted from the unclosed side of the guide baffle 20 and slid along the guide baffle 20 into the blade root receiving space 23. When one end face 220 of the blade root 200 is in contact with the fixed end clamping assembly 30, the movable end clamping assembly 40 is then inserted into the other end of the guide baffle 20 and in contact with the other end face 220 of the blade root 200. The self-locking component 50 is then connected to the movable end clamping assembly 40, and the position of the movable end clamping assembly 40 is locked by the self-locking component 50. Finally, the two side surfaces 210 of the blade root 200 are fitted with the first fitting surface 211 and the second fitting surface 221, and the two end faces 220 of the blade root 200 are fitted with the fixed end clamping assembly 30 and the movable end clamping assembly 40, thus shielding and protecting the blade root 200 within the blade root receiving space 23. When it is necessary to replace the blade, the operator only needs to operate the self-locking component 50 to unlock and disassemble the movable end clamping assembly 40 to remove the blade and install the new blade.

[0070] Understandably, existing blade sandblasting and shielding devices require disassembling the structures at both ends of the guide block during blade assembly and disassembly. Furthermore, multiple bolts are used to clamp the blade root, leading to inconvenience and reduced efficiency. Additionally, the bolts are prone to locking up under prolonged high-temperature sandblasting conditions, further increasing the difficulty of disassembly.

[0071] The blade root shielding device 100 for blade-like parts provided in this embodiment only requires disassembly and assembly of the movable end clamping assembly 40 during use, while the fixed end clamping assembly 30 does not need to be disassembled again after installation, making the blade assembly and disassembly process simpler and improving efficiency. Furthermore, the self-locking member 50 clamps the movable end clamping assembly 40, preventing it from easily locking during use and simplifying operation, further reducing the difficulty of assembly and disassembly.

[0072] Furthermore, an anti-detachment baffle 60 is also provided on the inner side of the first guide baffle 21 and / or the second guide baffle 22, that is, at least one of the guide baffles 20 has the anti-detachment baffle 60 on its inner side. After the blade root 200 is inserted into the blade root receiving space 23, the anti-detachment baffle 60 extends into the groove 2102 of the side surface 210 of the blade root 200, and the anti-detachment baffle 60 and the side surface 210 of the blade root 200 are spaced apart from each other. That is to say, the position of the anti-detachment baffle 60 corresponds to the position of one groove 2102 of the side surface 210 of the blade root 200. When the blade root 200 is inserted into the blade root receiving space 23, the anti-detachment baffle 60 will be inserted into the corresponding groove 2102, and the anti-detachment baffle 60 will not contact the groove wall of the groove 2102 (that is, it will not contact the side surface 210). The anti-fall baffle 60 is used to restrict the vertical movement of the blade root, preventing the blade from falling off due to accidental flipping of the base plate 10. Under normal circumstances, when the blade does not move vertically, the anti-fall baffle 60 will not contact the blade root 200. Only when the blade moves vertically will the anti-fall baffle 60 contact the side 210 of the blade root 200, locking the blade root 200 and restricting the blade from flipping.

[0073] It is understandable that the side 210 of the blade root 200 is usually the location where the mating structure of the blade root 200 is set, and it is the location of the mating surface of the blade root 200. By setting the anti-drop baffle 60 to extend into the groove 2102 without contacting the blade root 200, it not only prevents the blade from accidentally falling off, but also avoids damage to the surface of the blade root 200. In addition, it can also reduce the difficulty of installing the blade root 200. For example, if the anti-drop baffle 60 is set to contact and completely fit the side 210 of the blade root 200, the surface of the blade root 200 may be damaged due to friction during the clamping process; on the other hand, if the anti-drop baffle 60 is set to completely fit the side 210 of the blade root 200, misalignment or slight tilt of the anti-drop baffle 60 may prevent the blade root 200 from being installed, and forced installation will damage the surface of the blade root 200. In the case of the commonly used leaf root 200 structure, the leaf root 200 is usually a fir tree-shaped structure. The side 210 of the leaf root 200 is provided with multiple protruding parts 2103, and a groove 2102 is formed between adjacent protruding parts 2103. When the leaf root 200 is inserted into the leaf root receiving space 23, the anti-falling baffle 60 extends into the groove 2102 between two protruding parts 2103 and is spaced apart from the leaf root 200.

[0074] Preferably, in one embodiment, the base plate 10 adopts the base plate from an existing stator blade sandblasting and shielding device, thereby reducing processing costs. However, due to the use of an existing base plate, the base plate 10 is also a major source of space constraints. Specifically, the base plate 10 has eight threaded holes (M9), eight pin holes (M8), and four lifting lugs. Specifically, the first guide baffle 21 and the second guide baffle 22 are respectively connected to the base plate 10 by bolts, and the first guide baffle 21 has four pin holes of corresponding sizes, with the pins and pin holes engaging in a transition fit. More specifically, the bottom of the first guide baffle 21 has two first fixing threaded holes 213 for fixed connection with the base plate 10, and the bottom of the first guide baffle 21 also has four first positioning pin holes 214 corresponding to the pin holes of the base plate 10. The bottom of the second guide baffle 22 has a second fixing threaded hole 223 for fixed connection with the base plate 10.

[0075] Preferably, in one embodiment, the inner side of the first guide baffle 21 is provided with a first protrusion 212, the first protrusion 212 is located at the top of the inner surface of the first guide baffle 21, and the inner surface of the first protrusion 212 is the first mating curved surface 211. The inner side of the second guide baffle 22 is provided with a second protrusion 222, the second protrusion 222 is located at the top of the inner surface of the second guide baffle 22, and the inner surface of the second protrusion 222 is the second mating curved surface 221. That is, in this embodiment, both the first guide baffle 21 and the second guide baffle 22 have a structure protruding from the top. The protruding structure fits into the top area 2101 of the side surface 210 of the blade root 200, thereby better preventing the inner side of the guide baffle from contacting the mating surface of the blade root 200, avoiding damage to the blade root 200, and also preventing the guide baffle from obstructing the sandblasting treatment of the blade body.

[0076] Preferably, in one embodiment, the top surface 2121 of the first protrusion 212 is a curved surface that matches the top region 2101 of one side surface 210 of the leaf root 200, and the height of the top surface 2121 of the first protrusion 212 is lower than the height of the top surface of the leaf root 200. The top surface 2221 of the second protrusion 222 is a curved surface that matches the top region 2101 of the other side surface 210 of the leaf root 200, and the height of the top surface 2221 of the second protrusion 222 is lower than the height of the top surface of the leaf root 200. That is, in this embodiment, the top surfaces of the first guide baffle 21 and the second guide baffle 22 are generally lower than the leaf root 200, so that a portion of the transition area on the side surface 210 of the leaf root 200 near the leaf body will be exposed. The reason for this design is that, theoretically, the optimal approach would be for the top surface 2121 of the first protrusion 212 to be completely flush with the top surface of the blade root 200, and the top surface 2221 of the second protrusion 222 to be completely flush with the top surface of the blade root 200, thus allowing for complete contact with the top area 2101 of the blade root 200 from both sides. However, errors can occur during actual manufacturing. If, after the blade is installed, the top surfaces of the first guide baffle 21 and the second guide baffle 22 are higher than the blade root 200, then the tops of the first guide baffle 21 and the second guide baffle 22 will obstruct the blade body, thus affecting the sandblasting effect. This design in this embodiment effectively avoids affecting the sandblasting effect on the blade body.

[0077] More preferably, in one embodiment, the top surface 2121 of the first protrusion 212 is 0.2 mm lower than the top surface of the blade root 200, and the top surface 2221 of the second protrusion 222 is 0.2 mm lower than the top surface of the blade root 200. It is understood that if the top surfaces of the first guide baffle 21 and the second guide baffle 22 are too low, the surfaces on the blade root 200 that need protection will be exposed, making the blade root 200 susceptible to damage during sandblasting. This design in this embodiment balances the sandblasting effect on the blade body with the protection of the blade root 200.

[0078] Specifically, in one embodiment, the surface of the first protrusion 212 that contacts the leaf root 200 adopts a spatial curve fitted by 6 sets of spatial coordinates, and the surface of the second protrusion 222 that contacts the leaf root 200 adopts a spatial curve fitted by 6 sets of spatial coordinates, so that the first protrusion 212, the second protrusion 222 and the leaf root 200 can fit more perfectly and accurately, further improving the shielding effect.

[0079] Preferably, in one embodiment, the anti-detachment baffle 60 is provided on the inner side of both the first guide baffle 21 and the second guide baffle 22. By providing the anti-detachment baffle 60 on both the first guide baffle 21 and the second guide baffle 22, when the blade moves vertically, it can more quickly abut against the blade root 200, or abut against the blade root 200 from both sides, making the force on the blade root 200 more balanced and reducing damage to the blade root 200. The inner side of the first guide baffle 21 is provided with a first anti-detachment baffle threaded hole 215, and the anti-detachment baffle 60 is installed in the first anti-detachment baffle threaded hole 215 by a threaded connector (specifically, a bolt). The inner side of the second guide baffle 22 is provided with a second anti-detachment baffle threaded hole 224, and the anti-detachment baffle 60 is installed in the second anti-detachment baffle threaded hole 224 by a threaded connector (specifically, a bolt). In other words, the anti-falling baffle 60 and the guide baffle 20 are separate structures connected by bolts. This structural design can reduce the difficulty of processing.

[0080] Preferably, in one embodiment, the anti-detachment baffle 60 includes a mounting portion 61 and a limiting portion 62 protruding inward from the middle of the mounting portion 61. The mounting portion 61 has a mounting hole, and the mounting portion 61 is installed at the threaded hole 224 of the second anti-detachment baffle through the threaded connector. After the blade root 200 is inserted into the blade root receiving space 23, the limiting portion 62 extends into the groove 2102, and the limiting portion 62 and the side surface 210 of the blade root 200 are spaced apart from each other.

[0081] Preferably, in one embodiment, the fixed-end clamping assembly 30 includes a fixed-end baffle 31 and a fixed-end wedge 32. The fixed-end baffle 31 is connected to the first guide baffle 21 and the second guide baffle 22 on both sides, respectively. The fixed-end wedge 32 is connected to the fixed-end baffle 31, and the surface of the fixed-end wedge 32 away from the fixed-end baffle 31 matches one end face 200 of the blade root 200. The movable-end clamping assembly 40 includes a movable-end baffle 41 and a movable-end wedge 42. The movable-end baffle 41 is detachably connected to the self-locking member 50. The movable-end wedge 42 is connected to the movable-end baffle 41, and the surface of the movable-end wedge 42 away from the movable-end baffle 41 matches the other end face 200 of the blade root 200. The fixed-end wedge 32 is provided because, due to the limitations of the holes in the base plate 10, the guide baffle 20 is longer than the blade root 200. Therefore, the fixed-end wedge 32 can compensate for the length difference. Additionally, the fixed-end wedge 32, in conjunction with the guide baffle 20 and the fixed-end baffle 31, can also abut against the end face 220 of the blade root 200, thus fixing the blade. Similarly, the movable-end wedge 42 can also compensate for the length difference and fix the blade. This structural design allows for better compatibility with existing bases. The movable-end clamping assembly 40 clamps the end face 220 of the blade root 200 through the cooperation of the movable-end baffle 41 and the movable-end wedge 42, with the clamping force originating from the self-locking member 50.

[0082] Of course, in other embodiments, to address the problem that the guide baffle is longer than the blade root due to the current space limitation of the base plate, an adapter base plate can be used instead of extending the guide baffle.

[0083] Preferably, in one embodiment, the inner surface of the fixed end baffle 31 is provided with a first groove 311, and the side of the fixed end wedge 32 near the fixed end baffle 31 is provided with a first positioning protrusion 321 that matches the first groove 311. The first positioning protrusion 321 is engaged in the first groove 311. The cooperation between the first positioning protrusion 321 and the first groove 311 can play an auxiliary positioning role, ensuring the accurate position of the fixed end baffle 31 and the fixed end wedge 32. The inner surface of the movable end baffle 41 is provided with a second groove 411, and the movable end wedge 42 is provided with a second positioning protrusion 421 that matches the second groove 411. The second positioning protrusion 421 is engaged in the second groove 411. Similarly, the cooperation between the second positioning protrusion 421 and the second groove 411 can play an auxiliary positioning role, ensuring the accurate position of the movable end baffle 41 and the movable end wedge 42.

[0084] Preferably, in one embodiment, the two sides of the fixed end baffle 31 are respectively connected to the first guide baffle 21 and the second guide baffle 22 by fixing bolts 70. Specifically, the end of the first guide baffle 21 is provided with a first mounting threaded hole 216, and the fixing bolt 70 is threadedly connected to the first mounting threaded hole 216. The end of the second guide baffle 22 is provided with a second mounting threaded hole, and the fixing bolt 70 is threadedly connected to the second mounting threaded hole. That is, in this embodiment, the fixed end baffle 31 and the guide baffle 20 are separate structures. More preferably, the fixed end wedge 32 is provided with a connecting threaded hole 322 on the side near the fixed end baffle 31, and an adjusting bolt 80 is provided between the fixed end baffle 31 and the fixed end wedge 32. The rod of the adjusting bolt 80 passes through the fixed end baffle 31 and is threadedly connected to the connecting threaded hole 322. This structure allows the position of the fixed end wedge 32 to be adjusted. The tightening function of the end face 220 of the blade root 200 can be achieved by turning the adjusting bolt 80. The operator turns the adjusting bolt 80 to drive the fixed end wedge 32 to move, thereby tightening the end face 220 of the blade root 200.

[0085] Preferably, in one embodiment, the fixed end baffle 31 is provided with a clearance hole 312 corresponding to the fixing bolt 70 and the adjusting bolt 80. The width of the clearance hole 312 is greater than the diameter of the bolt shank and less than the diameter of the bolt head. That is, the width of the clearance hole 312 is greater than the diameter of the bolt shank, so that the bolt shank can pass smoothly through the clearance hole 312, and the width of the clearance hole 312 is less than the diameter of the bolt head, so that the bolt head cannot pass through the clearance hole 312. During installation, the shank of the fixing bolt 70 is passed through the clearance hole 312, and the shank of the fixing bolt 70 is screwed into the corresponding threaded hole, so that the head of the fixing bolt 70 abuts against the back side (the side away from the fixing end wedge 32) of the fixed end baffle 31, thereby realizing the fixed connection between the fixed end baffle 31 and the guide baffle 20. Similarly, the shank of the adjusting bolt 80 is screwed into the connecting threaded hole 322, allowing the head of the adjusting bolt 80 to abut against the back of the fixed end baffle 31, thus connecting the fixed end baffle 31 to the fixed end wedge 32. The clearance hole 312 extends along the height direction of the fixed end baffle 31, so that after the bolt is loosened, the fixed end baffle 31 can be lifted and moved along the height direction. That is, in this embodiment, the clearance hole 312 is a sliding groove structure clearance hole, which allows the fixed end baffle 31 to be lifted without completely disassembling the bolt, simply by loosening the bolt. Through this structural design, sandblasting can be achieved without completely disassembling the fixed end baffle 31, further improving the convenience of using the shielding device. For example, when fixing, the fixing bolt 70 and the adjusting bolt 80 are tightened, while during sandblasting, only the bolts need to be loosened to lift the fixed end baffle 31, and the airflow can be blown towards the blade through the clearance hole 312 for sandblasting. More preferably, the clearance hole 312 extends downward through the bottom surface of the fixed end baffle 31. It is understood that when the fixed end baffle 31 is provided with the first groove 311, in order to avoid the fixed end wedge 32 affecting the lifting of the fixed end baffle 31, the first groove 311 should also extend along the height direction.

[0086] In other embodiments, to achieve sand blowing without disassembling the fixed end baffle 31, sand blowing holes can be provided in corresponding areas of the fixed end baffle 31, allowing airflow to be blown towards the blades through the sand blowing holes. Additionally, in other embodiments, the fixed end baffle 31, the fixed end wedge 32, and the guide baffle 20 may not employ a separate bolted connection structure, but rather adopt an integrated structural design.

[0087] Preferably, in one embodiment, the self-locking component 50 includes a fixing plate 51, a handle 52, a locking housing 53, a hook 54, a spring bracket 55, and a spring 56. The fixing plate 51 is fixedly mounted on the base plate 10 or the guide baffle 20. One end of the handle 52 is rotatably connected to the fixing plate 51. Specifically, in one embodiment, the fixing plate 51 is provided with a mounting base 511, and the handle 52 is rotatably mounted on the mounting base 511 via a pivot pin 57. One end of the locking housing 53 is hinged to the middle of the handle 52. The hook 54 is located outside the other end of the locking housing 53 and is detachably connected to the movable end clamping assembly 40. The spring bracket 55 is located inside the locking housing 53 and is connected to the hook 54. The spring 56 is disposed between the other end of the locking housing 53 and the spring bracket 55. The handle 52 has an unlocked state and a locked state where, after rotating relative to the fixed plate 51, the latch housing 53 is pulled down. In the locked state, the latch housing 53 compresses the spring 56, and the protrusion 521 at the end of the handle 52 abuts against the back of the spring bracket 55 (the surface away from the spring 56). That is, in this embodiment, the self-locking member 50 adopts an elastic latch-type self-locking structure. When using it, the operator only needs to turn the handle 52 to clamp and release the movable end clamping assembly 40. Specifically, in use, the operator first connects the hook 54 to the movable end clamping assembly 40. Then, the operator moves the handle 52 away from the hook 54. Since the locking housing 53 is connected to the handle 52, the rotation of the handle 52 will synchronously pull down the locking housing 53, causing the other end of the locking housing 53 to exert force on the spring 56, compressing the spring 56. The compressed spring 56 will then exert force on the spring bracket 55, causing the spring bracket 55 to move the hook 54 downward, locking the movable end clamping assembly 40. When the operator moves the handle 52 to the desired position, the protrusion 521 on the handle 52 will abut against the back of the spring bracket 55. Since the spring 56 will continuously exert force on the spring bracket 55, the spring bracket 55 will abut against the protrusion 521, thus restricting the position of the handle 52 and achieving center self-locking. At this time, it is in the locked state. When it is necessary to loosen the movable end clamping assembly 40, the operator only needs to apply a certain amount of force to make the protrusion 521 disengage from the back of the spring bracket 55, and then pull the handle 52 towards the hook 54 to unlock it.

[0088] In other embodiments, the self-locking member 50 may not employ a resilient locking self-locking structure, but rather other self-locking structures. For example, it may employ two wedge blocks, a cam mechanism, a linkage mechanism, etc. It may even employ a bolt structure similar to that in the fixed-end clamping assembly 30.

[0089] More preferably, in one embodiment, limit posts 551 are provided on both sides of the spring bracket 55, and the locking housing 53 is provided with a limiting groove 531 extending along the length direction corresponding to the limit posts 551. When the locking housing 53 and the spring bracket 55 move relative to each other, the limit posts 551 can slide along the limiting grooves 531. Through the cooperation between the limit posts 551 and the limiting grooves 531, the positional relationship between the spring bracket 55 and the locking housing 53 can be better stabilized.

[0090] Specifically, in one embodiment, locking brackets 412 are provided on both sides of the movable end baffle 41, and the hooks on the locking brackets 412 are used to connect and cooperate with the hooks 54. Correspondingly, two self-locking members 50 are provided, and the two self-locking members 50 are used to cooperate with the two locking brackets 412, so that the movable end baffle 41 can be locked from both sides, making the force more even.

[0091] When using the blade root shielding device 100 for blade-like parts, the blade root needs to be slid into the device from the side of the movable end clamping assembly 40 along the guide baffle 20. After the end face of the blade root is in contact with the fixed end wedge 32, the movable end wedge 42 is slid into the guide baffle 20 and in contact with the other end face of the blade root, and the movable end baffle 41 is pushed to the closed position. The hook 54 is hooked onto the initial positioning point of the locking bracket 412, and the operator then pulls the handle 52 downward (or in a specific direction). The rotation of the handle 52 causes the locking housing 53, which is linked to it, to move downward, compressing the spring 56. Therefore, the spring 56 will exert a reverse thrust on the spring bracket 55. Because the spring bracket 55 is fixedly connected to the hook 54, the hook 54 will tightly pull the movable end baffle 41 towards the fixed end, eliminating gaps. When the handle 52 is rotated to its horizontal position, the protrusion 521 on the handle 52 will abut against the spring bracket 55, forming a center-locking mechanism. When the blade needs to be replaced, the operator pulls the handle 52 upwards, which causes the locking housing 53 to move upwards. At this time, the locking housing 53 no longer applies pressure to the spring 56, and therefore the spring 56 also releases its pushing force on the spring bracket 55. At this point, the movable end baffle 41 can be opened to remove the blade.

[0092] During sandblasting, the three bolts on the fixed end baffle 31 need to be loosened first (the fixed end baffle 31 does not need to be removed). Then, the fixed end baffle 31 is lifted, and compressed air is injected from the fixed end to the movable end to achieve the sandblasting function. After the sandblasting is completed, the bolts are tightened and the next sandblasting operation is continued.

[0093] The blade root shielding device 100 for blade-like parts achieves a high degree of fit between the shielding device and the blade without affecting the sandblasting effect by fitting the blade root spatial curve of the multi-stage moving blade. Under the existing space constraints of the base plate, a flexible locking fixture replaces the original design with multiple bolts for fixing, reducing disassembly difficulty and improving work efficiency. A sliding groove-type clearance hole reduces the difficulty of sandblasting (simply loosen the fixing bolts and lift the baffle). An anti-falling baffle (not in contact with the blade root) is added inside the device to restrict the vertical movement of the blade root, preventing the blade from falling off due to accidental flipping of the base plate.

[0094] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A blade root shielding device for blade-like parts, characterized in that, Includes a base plate, guide baffle, fixed end clamping assembly, movable end clamping assembly, and self-locking component; The guide baffle includes a first guide baffle and a second guide baffle. The first guide baffle and the second guide baffle are respectively disposed on the base plate and spaced apart to form a leaf root receiving space. The inner side of the first guide baffle is provided with a first fitting curved surface that matches the top area of ​​one side of the leaf root, and the inner side of the second guide baffle is provided with a second fitting curved surface that matches the top area of ​​the other side of the leaf root. The fixed end clamping assembly is disposed at one end of the first guide baffle and the second guide baffle, and is used to abut against one end face of the leaf root; The movable end clamping assembly is movably disposed at the other end of the first guide baffle and the second guide baffle, and is used to abut against the other end face of the leaf root; The self-locking component is disposed on the base plate or the guide baffle and is detachably connected to the movable end clamping assembly, so as to lock the movable end clamping assembly to the other end of the first guide baffle and the second guide baffle. An anti-drop baffle is also provided on the inner side of the first guide baffle and / or the second guide baffle. After the leaf root is inserted into the leaf root receiving space, the anti-drop baffle extends into the groove on the side of the leaf root, and the anti-drop baffle and the side of the leaf root are spaced apart from each other.

2. The blade root shielding device for blade-like parts according to claim 1, characterized in that, The first guide baffle has a first protrusion on its inner side, the first protrusion is located at the top of the inner surface of the first guide baffle, and the inner surface of the first protrusion is the first fitting curved surface. The inner side of the second guide baffle is provided with a second protrusion, the second protrusion is located at the top of the inner surface of the second guide baffle, and the inner surface of the second protrusion is the second fitting curved surface.

3. The blade root shielding device for blade-like parts according to claim 2, characterized in that, The top surface of the first protrusion is a curved surface that matches the top area of ​​one side of the leaf root, and the height of the top surface of the first protrusion is lower than the height of the top surface of the leaf root. The top surface of the second protrusion is a curved surface that matches the top area of ​​the other side of the leaf root, and the height of the top surface of the second protrusion is lower than the height of the top surface of the leaf root.

4. The blade root shielding device for blade-like parts according to claim 1, characterized in that, The anti-fall-off baffle is provided on the inner side of both the first guide baffle and the second guide baffle; The inner side of the first guide baffle is provided with a first anti-drop baffle threaded hole, and the anti-drop baffle is installed at the first anti-drop baffle threaded hole through a threaded connector; The inner side of the second guide baffle is provided with a second anti-drop baffle threaded hole, and the anti-drop baffle is installed at the second anti-drop baffle threaded hole through a threaded connector.

5. The blade root shielding device for blade-like parts according to claim 1, characterized in that, The fixed-end clamping assembly includes a fixed-end baffle and a fixed-end wedge; The fixed end baffle is connected to the first guide baffle and the second guide baffle on both sides respectively; The fixed end wedge is connected to the fixed end baffle, and the surface of the fixed end wedge away from the fixed end baffle matches one end face of the leaf root. The movable end clamping assembly includes a movable end baffle and a movable end wedge; The movable end baffle is detachably connected to the self-locking component; The movable end wedge is connected to the movable end baffle, and the surface of the movable end wedge on the side away from the movable end baffle matches the other end face of the leaf root.

6. The blade root shielding device for blade-like parts according to claim 5, characterized in that, The inner surface of the fixed end baffle is provided with a first groove, and the fixed end wedge is provided with a first positioning protrusion that matches the first groove on the side near the fixed end baffle. The first positioning protrusion is engaged in the first groove. The inner surface of the movable end baffle is provided with a second groove, and the movable end wedge is provided with a second positioning protrusion that matches the second groove, and the second positioning protrusion is engaged in the second groove.

7. The blade root shielding device for blade-like parts according to claim 5, characterized in that, The two sides of the fixed end baffle are respectively connected to the first guide baffle and the second guide baffle by fixing bolts; A connecting threaded hole is provided on the side of the fixed end wedge block near the fixed end baffle. An adjusting bolt is provided between the fixed end baffle and the fixed end wedge block. The rod of the adjusting bolt passes through the fixed end baffle and is threaded to the connecting threaded hole.

8. The blade root shielding device for blade-like parts according to claim 7, characterized in that, The fixed end baffle is provided with clearance holes corresponding to the fixed bolt and the adjusting bolt. The width of the clearance holes is greater than the diameter of the bolt shank and less than the diameter of the bolt head. The clearance hole extends along the height direction of the fixed end baffle so that the fixed end baffle can be lifted and moved along the height direction after the bolt is loosened.

9. The blade root shielding device for blade-like parts according to claim 5, characterized in that, The fixed end baffle is provided with sand blowing holes.

10. The blade root shielding device for blade-like parts according to claim 1, characterized in that, The self-locking component includes a fixing plate, a handle, a locking housing, a hook, a spring bracket, and a spring. The fixing plate is fixedly mounted on the base plate or the guide baffle; One end of the handle is rotatably connected to the fixed plate; One end of the latch housing is hinged to the middle of the handle; The hook is located outside the other end of the locking housing and is used to detachably connect to the movable end clamping assembly; The spring bracket is located inside the latch housing and is connected to the hook; The spring is positioned between the other end of the latch housing and the spring bracket; The handle has an unlocked state and a locked state in which the latch housing is pulled down after being rotated relative to the fixed plate. In the locked state, the latch housing compresses the spring, and the protrusion at the end of the handle abuts against the back of the spring bracket.

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