A blade shot peening fixing device and blade clamping method

Abstract

This application discloses a blade shot peening fixing device and a blade clamping method, relating to the field of gas turbine technology, and aims to solve the problem of poor shot peening effect during blade shot peening treatment. The blade shot peening fixing device includes a first clamping member and a second clamping member. The second clamping member moves relative to the first clamping member along a first direction, which is parallel to the horizontal direction. The first clamping member and the second clamping member form a clamping cavity. The blade body is located within the clamping cavity, while the blade root is exposed outside the clamping cavity.

Description

Technical Field

[0001] This application relates to the field of gas turbine technology, and in particular to a blade shot peening fixing device and a blade clamping method. Background Technology

[0002] Blades are key components of gas turbines. High-speed rotating blades are prone to fatigue cracks under alternating loads, which is detrimental to the stable operation of gas turbines.

[0003] In related technologies, shot peening uses shot to bombard the blade surface, which can introduce residual compressive stress that forms a stress opposite to the alternating load on the blade surface. This stress can offset the tensile stress generated by the alternating load to a certain extent, so that the effective tensile stress actually borne by the part is lower than the stress threshold for fatigue crack initiation, thereby delaying the initiation of fatigue cracks.

[0004] However, the requirements for shot peening intensity, coverage, and shot hardness differ between the leaf root and leaf body during shot peening. The shot peening fixtures in related technologies have poor shot peening effects when holding the leaves for shot peening. Summary of the Invention

[0005] The purpose of this application is to provide a blade shot peening fixing device and a blade clamping method, which aims to solve the problem of poor shot peening effect when blades are shot peened.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] A blade shot peening fixing device includes a first clamping member and a second clamping member. The second clamping member moves relative to the first clamping member along a first direction, which is parallel to the horizontal direction. The first clamping member and the second clamping member form a clamping cavity. The blade body is located inside the clamping cavity, while the blade root is exposed outside the clamping cavity.

[0008] The blade shot peening fixing device provided in this application embodiment stably clamps the blade body through the clamping cavity formed by the first clamping member and the second clamping member. When the blade root is shot peened, the first clamping member and the second clamping member can protect the blade body, preventing the shot particles suitable for the blade root from acting on the blade body and causing over-peening of the blade body. Instead, the shot particles only act on the blade root exposed outside the clamping cavity, thereby improving the shot peening effect of the blade.

[0009] In some embodiments of this application, the first clamping member includes a first clearance surface, which is disposed on opposite sides of the first clamping member along a second direction; the second direction is perpendicular to the first direction. The second clamping member includes a second clearance surface, which is disposed on opposite sides of the second clamping member along the second direction. Wherein, pointing from the second clamping member towards the leaf root, the first clearance surface and the second clearance surface are inclined toward the leaf root.

[0010] In some embodiments of this application, the blade shot peening fixing device further includes a connecting base, one end of which is provided with a receiving cavity, a first clamping member is disposed in the receiving cavity and connected to the connecting base, and the other end of the connecting base is used to connect to the turntable of the shot peening equipment.

[0011] In some embodiments of this application, the first clamping member further includes a sliding engagement block, the sliding engagement block having an abutment protrusion on the side away from the connecting base. The second clamping member further includes a sliding groove, the sliding groove being slidably connected to the sliding engagement block along a first direction and abutting against the abutment protrusion along a third direction, the third direction, the first direction, and the second direction being perpendicular to each other.

[0012] In some embodiments of this application, the blade shot peening fixing device further includes a clamping assembly connected to a connecting base, which can drive the second clamping member to move relative to the first clamping member. The clamping assembly has a locked position, in which it presses the second clamping member against the first clamping member.

[0013] In some embodiments of this application, the clamping assembly includes a fixed bracket, a first connecting rod, a second connecting rod, and a drive rod. The fixed bracket is connected to a connecting base; both the first and second connecting rods are rotatably connected to the fixed bracket; the drive rod is rotatably connected to the first and second connecting rods, and has an elastic abutment portion on the side of the drive rod facing the second clamping member. The fixed bracket, the first connecting rod, the second connecting rod, and the drive rod constitute a crank-rocker mechanism.

[0014] In some embodiments of this application, the distance between the elastic abutment and the drive rod is adjustable.

[0015] In some embodiments of this application, the first clamping member includes a first clamping surface adapted to connect with the inner arc surface of the blade. The second clamping member includes a second clamping surface, which is disposed opposite to the first clamping surface along a first direction, and is adapted to connect with the back arc surface of the blade.

[0016] In some embodiments of this application, the blade shot peening fixing device further includes a first elastic protective pad and a second elastic protective pad, wherein the first elastic protective pad is connected to the first clamping surface and the second elastic protective pad is connected to the second clamping surface.

[0017] This application also provides a blade clamping method, which uses the above-mentioned blade shot peening fixing device. The blade clamping method includes: connecting the connecting base to the shot peening equipment; abutting the back arc surface of the blade body with the first clamping member; driving the clamping assembly to rotate to the locking position, so that the second clamping member moves toward the first clamping member and abuts against the inner arc surface of the blade body. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments 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.

[0019] Figure 1 This is a schematic diagram of the blade shot peening fixing device provided in the embodiments of this application;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the first clamping component;

[0021] Figure 3 This is a schematic diagram of the structure of the connecting base provided in an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the clamping assembly provided in the embodiments of this application;

[0023] Figure 5 This is a schematic flowchart of the blade clamping method provided in the embodiments of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100. Blade shot peening fixing device;

[0026] 11. First clamping component; 111. First clearance surface; 112. Sliding mating block; 113. Abutting protrusion; 114. First clamping surface; 12. Second clamping component; 121. Second clearance surface; 122. Slide groove; 123. Second clamping surface; 13. Clamping cavity; 14. Connecting base; 141. Receiving cavity; 151. Fixing pin; 152. Bolt; 16. Clamping assembly; 161. Fixed bracket; 162. First connecting rod; 163. Second connecting rod; 164. Drive rod; 165. Elastic abutting part; 166. Clamping handle; 171. First elastic protective pad; 172. Second elastic protective pad;

[0027] 200. Leaf blade; 21. Leaf blade; 22. Leaf root; 300. Turntable;

[0028] F1, first direction; F2, second direction; F3, third direction. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Gas turbine blades can include blade body and blade root. When performing shot peening on blades, the requirements for shot peening intensity, coverage and shot hardness are different for blade root and blade body.

[0031] Specifically, the blade body mainly serves to connect the blades with components such as the impeller and transmit loads, requiring higher strength and fatigue resistance. Therefore, the shot peening intensity, coverage, and shot hardness of the blade root need to be greater than those of the blade body to form a deeper and more stable residual compressive stress layer on the blade root surface.

[0032] The shot peening fixtures used in related technologies have poor shot peening effects when holding blades for shot peening, mainly in two aspects:

[0033] Firstly, over-spraying of the leaf body occurs when shot peening the leaf roots. Shot peening pellets suitable for the leaf roots may also be sprayed onto the leaf body that has already undergone shot peening, resulting in over-spraying of the leaf body.

[0034] Secondly, the shot peening of the leaf roots is uneven. When shot peening the side below the leaf roots, the shot particles are blocked by the shot peening fixture, resulting in uneven shot peening on the upper and lower sides of the leaf roots.

[0035] Based on this, this application provides a blade shot peening fixing device, which can effectively improve the shot peening effect and is applicable to different types of blades, thus improving the versatility of the blade shot peening fixing device.

[0036] Figure 1 This is a schematic diagram of the blade shot peening fixing device provided in an embodiment of this application. Figure 2 for Figure 1 A schematic diagram of the structure of the first clamping component is provided in conjunction with the reference. Figure 1 and Figure 2 In some embodiments of this application, the blade shot peening fixing device 100 includes a first clamping member 11 and a second clamping member 12. The second clamping member 12 moves relative to the first clamping member 11 along a first direction F1, where the first direction F1 is parallel to the horizontal direction. The first clamping member 11 and the second clamping member 12 form a clamping cavity 13. The blade body 21 of the blade 200 is located within the clamping cavity 13, while the blade root 22 of the blade 200 is exposed outside the clamping cavity 13.

[0037] Understandably, the blade 21 is stably held in the clamping cavity 13 formed by the first clamping member 11 and the second clamping member 12. When the blade root 22 is shot peened, the first clamping member 11 and the second clamping member 12 can protect the blade 21, preventing the shot particles suitable for the blade root 22 from acting on the blade 21 and causing over-peening of the blade 21. Instead, the shot particles only act on the blade root 22 exposed outside the clamping cavity 13, thereby improving the shot peening effect of the blade 200.

[0038] Continue reading Figure 1 and Figure 2 In some embodiments of this application, the first clamping member 11 includes a first clearance surface 111, which is disposed on opposite sides of the first clamping member 11 along a second direction F2, the second direction F2 being perpendicular to the first direction F1. The second clamping member 12 includes a second clearance surface 121, which is disposed on opposite sides of the second clamping member 12 along the second direction F2. The first clearance surface 111 and the second clearance surface 121 are inclined toward the leaf root 22, pointing from the second clamping member 12 toward the leaf root 22.

[0039] In this way, when the shot peening equipment is shot peening the side below the leaf root 22, the shot particles can pass through the space above the first clearance surface 111 and the space above the second clearance surface 121 to reach the side below the leaf root 22, so that the shot peening effect of the side below the leaf root 22 is consistent with that of the side above the lower root, thereby further improving the shot peening effect of the blade 200.

[0040] Figure 3 This is a schematic diagram of the structure of the connection base provided in the embodiments of this application, in conjunction with reference to... Figure 2 and Figure 3 In some embodiments of this application, the blade shot peening fixing device 100 further includes a connecting base 14, one end of the connecting base 14 is provided with a receiving cavity 141, the first clamping member 11 is provided in the receiving cavity 141 and is detachably connected to the connecting base 14, and the other end of the connecting base 14 is used to connect to the turntable 300 of the shot peening equipment.

[0041] It should be noted that there can be multiple ways to connect the first clamping member 11 to the connecting base 14 and the connecting base 14 to the shot peening equipment.

[0042] For example, the connecting base 14 can be fixedly connected to the first clamping member 11 by fixing pin 151, bolt 152 or snap-fit ​​structure, or the connecting base 14 can be fixedly connected to the turntable 300 of the shot peening equipment by fixing pin 151, bolt 152 or snap-fit ​​structure.

[0043] In this way, the first clamping member 11 of different sizes can be easily replaced in the connecting base 14 according to the different models of blade 200, so as to improve the versatility of the blade shot peening fixing device 100.

[0044] Continue reading Figure 2 In some embodiments of this application, the first clamping member 11 further includes a sliding engagement block 112, and the sliding engagement block 112 has an abutment protrusion 113 on the side away from the connecting base 14. The second clamping member 12 further includes a sliding groove 122, which is slidably connected to the sliding engagement block 112 along a first direction F1 and abuts against the abutment protrusion 113 along a third direction F3, wherein the third direction F3, the first direction F1, and the second direction F2 are perpendicular to each other.

[0045] For example, the specific structure of the sliding engagement block 112 can be a T-shaped protrusion, and correspondingly, the structure of the sliding groove 122 can be a T-shaped groove.

[0046] In this way, on the one hand, the sliding engagement block 112 on the first clamping member 11 can guide the sliding of the second clamping member 12, ensuring that the second clamping member 12 can abut against one side of the blade body 21 along the first direction F1; on the other hand, the abutting protrusion 113 on the first clamping member 11 can press the second clamping member 12 against the first clamping member 11 to form a stable connection, avoiding the second clamping member 12 from moving upward relative to the first clamping member 11 after being impacted by the shot when the blade root 22 is shot peened from bottom to top, causing the blade 200 to loosen during the shot peening process, thereby ensuring the stability of the blade 200 during the shot peening process.

[0047] Figure 4 This is a schematic diagram of the clamping assembly provided in the embodiments of this application. (See attached diagram.) Figure 4 In some embodiments of this application, the blade shot peening fixing device 100 further includes a clamping assembly 16, which is connected to the connecting base 14. The clamping assembly 16 can drive the second clamping member 12 to move relative to the first clamping member 11. The clamping assembly 16 has a locked position, in which the clamping assembly 16 presses the second clamping member 12 against the first clamping member 11.

[0048] Thus, the second clamping member 12 can be easily driven to move towards the first clamping member 11 along the first direction F1 using the clamping assembly 16. At the same time, the locking position of the clamping assembly 16 can be used to press the second clamping member 12 against the first clamping member 11 along the first direction F1, preventing the blade root 22 from being pushed apart from the first clamping member 11 when it is subjected to the impact force along the first direction F1 during shot peening, thereby further ensuring the stability of the blade 200 during shot peening.

[0049] Continue reading Figure 4In some embodiments of this application, the clamping assembly 16 may include a fixed bracket 161, a first connecting rod 162, a second connecting rod 163, and a drive rod 164. The fixed bracket 161 is connected to the connecting base 14. The first connecting rod 162 and the second connecting rod 163 are both rotatably connected to the fixed bracket 161. The drive rod 164 is rotatably connected to the first connecting rod 162 and the second connecting rod. The drive rod 164 has an elastic abutment portion 165 on the side facing the second clamping member 12. The fixed bracket 161, the first connecting rod 162, the second connecting rod 163, and the drive rod 164 constitute a crank-rocker mechanism.

[0050] In this way, the dead point of the crank-rocker mechanism can be used as the locking position, so that the relative position of the second clamping member 12 and the first clamping member 11 remains fixed, ensuring the stability of the clamping cavity 13 and the blade 200. The elastic abutment part 165 can form a flexible contact with the second clamping member 12 to prevent damage to the second clamping member 12.

[0051] In addition, to facilitate user operation, a locking handle 166 is provided at the end of the drive rod 164 away from the elastic abutment part 165. When the locking handle 166 is rotated to the vertical direction, the crank rocker mechanism is in the locked position, thereby preventing the locking handle 166 from interfering with the spray gun and other components when the turntable 300 rotates during the shot peening process.

[0052] Continue reading Figure 4 In some embodiments of this application, the distance between the elastic abutment 165 and the drive rod 164 is adjustable. For example, the elastic abutment 165 and the drive rod 164 are connected by a threaded connection. The distance between the elastic abutment 165 and the drive rod 164 can be adjusted by rotating the elastic abutment 165 to adapt to the second clamping member 12 of different sizes and improve the versatility of the blade shot peening fixing device 100.

[0053] Continue reading Figure 1 and Figure 2 In some embodiments of this application, the first clamping member 11 includes a first clamping surface 114, which is adapted to connect with the inner arc surface of the blade 21. The second clamping member 12 includes a second clamping surface 123, which is disposed opposite to the first clamping surface 114 along a first direction F1, and is adapted to connect with the back arc surface of the blade 21.

[0054] It should be noted that the specific structure of the first clamping surface 114 and the second clamping surface 123 needs to be designed according to the structure of the inner arc surface and the back arc surface of the blade 21 in order to stably clamp the blade 21.

[0055] Continue reading Figure 1 and Figure 4In some embodiments of this application, the blade shot peening fixing device 100 further includes a first elastic protective pad 171 and a second elastic protective pad 172. The first elastic protective pad 171 is connected to the first clamping surface 114, and the second elastic protective pad 172 is connected to the second clamping surface 123.

[0056] It should be noted that the first elastic protective pad 171 and the second elastic protective pad 172 can be made of rubber, silicone, or polyimide, etc. The thickness of the first elastic protective pad 171 and the second elastic protective pad 172 can be between 3mm and 5mm.

[0057] Understandably, on the one hand, the elasticity of the first elastic protective pad 171 and the second elastic protective pad 172 can be used to enable a set of first clamping members 11 and second clamping members 12 of the same size to adapt to multiple blades 200 of similar size, reducing the frequency of replacement of the first clamping members 11 and the second clamping members 12, thereby improving processing efficiency; on the other hand, the first elastic protective pad 171 and the second elastic protective pad 172 can form a buffer between the inner arc surface of the blade body 21 and the first clamping surface 114, and between the back arc surface of the blade body 21 and the second clamping surface 123, to avoid excessive clamping force causing damage to the blade 200.

[0058] In addition, multiple friction bumps can be provided on the first elastic protective pad 171 and the second elastic protective pad 172 to increase friction and the stability of the blade 200.

[0059] It should be noted that the above description of the structure of this application is based on shot peening of the blade root 22 as an example. If shot peening is performed on the blade body 21, the blade root 22 needs to be housed within the clamping cavity 13 formed by the first clamping member 11 and the second clamping member 12, while the blade body 21 is exposed outside the clamping cavity 13. In this case, it is only necessary to replace the first clamping member 11 and the second clamping member 12 so that the first clamping surface 114 and the second clamping surface 123 can be adapted and connected to the blade root 22.

[0060] Figure 5 This is a flowchart illustrating the blade clamping method provided in the embodiments of this application. (See attached diagram.) Figure 5 This application also provides a blade clamping method, using the aforementioned blade shot peening fixing device 100, the blade clamping method comprising steps S101-S103:

[0061] Step S101: Connect the connecting base to the shot peening equipment.

[0062] Step S102: Make the back arc surface of the blade abut against the first clamping member.

[0063] Step S103: Drive the clamping assembly to rotate to the locked position so that the second clamping member moves toward the first clamping member and abuts against the inner arc surface of the blade.

[0064] Understandably, in related technologies, blades require a top-down insertion clamping method, and residual pellets within the clamp can cause mechanical scratches on the blade during sliding. In this application, however, a first clamping member 11 abuts against the back arc surface of the blade 21, and then the movement of the second clamping member 12 causes it to abut against the inner arc surface of the blade 21. Thus, throughout the clamping process, there is no relative sliding between the blade 21 and the first and second clamping members 11, thereby avoiding mechanical damage to the blade 21.

[0065] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and for simplification, 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. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in practical applications, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0066] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0067] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0068] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0069] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0070] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0071] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A blade shot peening fixing device, characterized in that, include: First clamping component; as well as The second clamping member moves relative to the first clamping member along a first direction, the first direction being parallel to the horizontal direction, and the first clamping member and the second clamping member form a clamping cavity; The blade body is located inside the clamping cavity, while the blade root is exposed outside the clamping cavity.

2. The blade shot peening fixing device according to claim 1, characterized in that, The first clamping member includes a first clearance surface, which is disposed on opposite sides of the first clamping member along a second direction; the second direction is perpendicular to the first direction. The second clamping member includes a second clearance surface, which is disposed on opposite sides of the second clamping member along the second direction; The second clamping member points towards the leaf root, and the first and second clearance surfaces are inclined toward the leaf root.

3. The blade shot peening fixing device according to claim 1, characterized in that, It also includes a connecting base, one end of which is provided with a receiving cavity, the first clamping member is disposed in the receiving cavity and detachably connected to the connecting base, and the other end of the connecting base is used to connect to the turntable of the shot peening equipment.

4. The blade shot peening fixing device according to claim 3, characterized in that, The first clamping member further includes a sliding engagement block, and the sliding engagement block has an abutting protrusion on the side away from the connecting base; The second clamping member further includes a sliding groove, which is slidably connected to the sliding mating block along a first direction and abuts against the abutting protrusion along a third direction, wherein the third direction, the first direction, and the second direction are perpendicular to each other.

5. The blade shot peening fixing device according to claim 4, characterized in that, Also includes: A clamping assembly is connected to the connecting base, and the clamping assembly is capable of driving the second clamping member to move relative to the first clamping member along the first direction; The clamping assembly has a locking position, in which the clamping assembly presses the second clamping member against the first clamping member.

6. The blade shot peening fixing device according to claim 5, characterized in that, The clamping assembly includes: A fixed bracket, which is connected to the connecting base; Both the first connecting rod and the second connecting rod are rotatably connected to the fixed bracket; and A drive rod is rotatably connected to the first connecting rod and the second connecting rod, and the drive rod has an elastic abutment portion on the side facing the second clamping member; The fixed bracket, the first connecting rod, the second connecting rod, and the drive rod constitute a crank-rocker mechanism.

7. The blade shot peening fixing device according to claim 5, characterized in that, The distance between the elastic abutment and the drive rod is adjustable.

8. The blade shot peening fixing device according to claim 1, characterized in that, The first clamping member includes a first clamping surface, which is adapted to connect with the inner arc surface of the blade. The second clamping member includes a second clamping surface, which is disposed opposite to the first clamping surface along the first direction, and the second clamping surface is adapted to connect with the back arc surface of the blade.

9. The blade shot peening fixing device according to claim 8, characterized in that, Also includes: A first elastic protective pad is connected to the first clamping surface; as well as The second elastic protective pad is connected to the second clamping surface.

10. A blade clamping method, using the blade shot peening fixing device according to any one of claims 5-9, characterized in that, include: Connect the connecting base to the shot peening equipment; Make the back arc surface of the blade abut against the first clamping member; The drive clamping assembly is rotated to the locked position so that the second clamping member moves toward the first clamping member and abuts against the inner arc surface of the blade.

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