Turbine moving blade fixture and turbine moving blade fixing method

Abstract

The present application provides a turbine moving blade fixture and a method for fixing a turbine moving blade. The turbine moving blade fixture is used to fix a turbine moving blade during the spraying process on the surface of the turbine moving blade. The turbine moving blade fixture includes: a fixture body, a backing plate, and a screw; a chute is provided on the fixture body, and a threaded hole is provided at the bottom of the chute; the backing plate is arranged at the bottom of the chute, and the first end of the backing plate is fixedly connected to the bottom of the chute, and the second end of the backing plate is a free end; when the blade root of the turbine moving blade slides into the chute from one end of the chute, and the screw moves from the threaded hole into the chute to a target position where a pressing relationship is formed with the second end of the backing plate, the second end of the backing plate fits against the blade root under the pressing of the screw, and the blade root is clamped between the backing plate and the chute wall. This solution can improve the efficiency of fixing the turbine moving blade.

Description

Technical Field

[0001] The present application relates to the technical field of gas turbines, and in particular to a turbine blade fixture and a method for fixing turbine blades. Background Art

[0002] The turbine blades are an important component of the gas turbine. The turbine blades have a dovetail-shaped blade root, which is embedded in the turbine shaft to connect the turbine blades to the turbine shaft. In order to ensure that the turbine blades have high surface performance, the turbine blades need to be surface sprayed to form a spray layer with strong corrosion resistance on the surface of the turbine blades. When the turbine blades are surface sprayed, the turbine blades need to be fixed on the turbine blade fixture, and the turbine blades need to be supported by the turbine blade fixture so that the turbine blades can be sprayed from different directions and the turbine blades will not move during the surface spraying process.

[0003] Currently, after the blade root of a turbine blade is embedded in a turbine blade fixture, two screws are required to fix the relative position between the turbine blade and the turbine blade fixture so that the turbine blade cannot slide on the turbine blade fixture.

[0004] When fixing the relative position between the turbine blade and the turbine blade fixture by two screws, in order to balance the force on the turbine blade, the two screws need to be turned at the same time. However, turning the two screws at the same time is inconvenient to operate, which leads to low efficiency in fixing the turbine blade. Summary of the invention

[0005] In view of this, the turbine blade fixture and the turbine blade fixing method provided in the present application can improve the efficiency of fixing the turbine blades when the surface of the turbine blades is sprayed.

[0006] In a first aspect, an embodiment of the present application provides a turbine blade fixture for fixing a turbine blade during a surface spraying process of the turbine blade, wherein the turbine blade fixture comprises: a fixture body, a liner plate and a screw;

[0007] The fixture body is provided with a slide groove, and the bottom of the slide groove is provided with a threaded hole;

[0008] The lining plate is arranged at the bottom of the slide slot, and the first end of the lining plate is fixedly connected to the bottom of the slide slot, and the second end of the lining plate is a free end;

[0009] When the blade root of the turbine moving blade slides into the chute from one end of the chute, and the screw moves from the threaded hole into the chute to reach the target position where it forms a pressing relationship with the second end of the backing plate, the second end of the backing plate fits against the blade root under the pressing of the screw, clamping the blade root between the backing plate and the chute wall.

[0010] In a first possible implementation manner, in combination with the first aspect described above, the turbine moving blade fixture includes: a limiting plate, a spacer block, and a first shroud;

[0011] The limiting plate is connected to the fixture body at the second end of the chute;

[0012] When the blade root and the spacer block slide into the chute from the first end of the chute in sequence, and the first shroud is connected to the fixture body at the first end of the chute, the blade root and the spacer block are limited within the chute, and the blade root is clamped between the limiting plate and the spacer block.

[0013] In a second possible implementation manner, in combination with the first possible implementation manner described above, the spacer block is of a plate-like structure, and the shape of the spacer block is the same as the end face shape of the blade root.

[0014] In a third possible implementation manner, in combination with the second possible implementation manner described above, the length of the chute is greater than the distance between the two end faces of the blade root, and the distance between the two end faces of the blade root is greater than the thickness of the spacer block; the difference between the length of the chute and the distance between the two end faces of the blade root and the thickness of the spacer block is less than or equal to 1.5 millimeters.

[0015] In a fourth possible implementation manner, in combination with the first possible implementation manner described above, the turbine moving blade fixture includes: a second shroud;

[0016] The second shroud is connected to the fixture body, and the first shroud and the second shroud shield the area on the blade root that needs to be shielded during spraying.

[0017] In a fifth possible implementation manner, in combination with the first possible implementation manner described above, the first end of the backing plate is adjacent to the first end of the chute, and the second end of the backing plate is adjacent to the second end of the chute.

[0018] In a sixth possible implementation manner, in combination with the fifth possible implementation manner described above, the distance between the first end and the second end of the backing plate is less than the distance between the two end faces of the blade root, and the distance between the second end of the backing plate and the limiting plate is greater than zero and less than or equal to 2 millimeters.

[0019] In the seventh possible implementation, in combination with the fifth possible implementation described above, the first end of the backing plate is a wedge-shaped structure.

[0020] In the eighth possible implementation, in combination with the first aspect or any possible implementation of the first aspect, the threaded hole is provided between the midpoint of the chute and the second end of the chute.

[0021] In a second aspect, an embodiment of the present application further provides a method for fixing a turbine moving blade. The method for fixing a turbine moving blade is implemented based on the turbine moving blade fixture provided in the first aspect or any possible implementation of the first aspect. The method for fixing a turbine moving blade includes:

[0022] Slide the blade root of the turbine moving blade into the chute from one end of the chute;

[0023] Drive the screw to move from the threaded hole into the chute to a target position where a pressing relationship is formed with the second end of the backing plate, so that the second end of the backing plate fits against the blade root under the pressing of the screw, and the blade root is clamped between the backing plate and the chute wall.

[0024] In the first possible implementation, in combination with the second aspect, when the turbine moving blade fixture includes a limit plate, a spacer block, and a first shroud,

[0025] The step of sliding the blade root of the turbine moving blade into the chute from one end of the chute includes:

[0026] Slide the turbine moving blade into the chute from the first end of the chute so that the blade root contacts the limit plate;

[0027] Before driving the screw to move from the threaded hole into the chute to a target position where a pressing relationship is formed with the second end of the backing plate, it includes:

[0028] Slide the spacer block into the chute from the first end of the chute;

[0029] Connect the first shroud to the fixture body at the first end of the chute, limit the blade root and the spacer block in the chute, and clamp the blade root between the limit plate and the spacer block.

[0030] As can be seen from the above technical solution, a chute is provided on the fixture body, a threaded hole is provided at the bottom of the chute, and the lining plate is arranged at the bottom of the chute. When the screw rod moves from the threaded hole into the chute, it will drive the lining plate to move away from the bottom of the chute. After sliding the blade root of the turbine moving blade into the chute from one end of the chute, turn the screw rod to move from the threaded hole into the chute until the screw rod reaches the target position where it forms a pressing relationship with the second end of the lining plate. One end of the lining plate fits against the blade root under the pressing of the screw rod, clamping the blade root between the lining plate and the chute wall, thereby fixing the turbine moving blade on the turbine moving blade fixture. It can be seen that after sliding the blade root into the chute, only the screw rod needs to be turned to move into the chute, so as to drive one end of the lining plate to move towards the blade root through the screw rod, clamp the blade root between the lining plate and the chute wall, and realize the fixation of the turbine moving blade. Since only one screw rod needs to be turned during the process of fixing the turbine moving blade, the operation is more convenient, the time required to fix the turbine moving blade to the turbine moving blade fixture can be shortened, and thus the efficiency of fixing the turbine moving blade can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of a turbine moving blade fixture provided in Embodiment 1 of the present application;

[0032] Figure 2 is a schematic diagram of another turbine moving blade fixture provided in Embodiment 1 of the present application;

[0033] Figure 3 is an assembly schematic diagram of a turbine moving blade and a turbine moving blade fixture provided in Embodiment 1 of the present application;

[0034] Figure 4 is a schematic diagram of a turbine moving blade fixture provided in Embodiment 2 of the present application;

[0035] Figure 5 is a schematic diagram of another turbine moving blade fixture provided in Embodiment 2 of the present application;

[0036] Figure 6 is a schematic diagram of yet another turbine moving blade fixture provided in Embodiment 2 of the present application;

[0037] Figure 7 is a schematic diagram of a turbine moving blade fixture provided in Embodiment 3 of the present application;

[0038] Figure 8 is a flowchart of a method for fixing a turbine moving blade provided in Embodiment 4 of the present application.

[0039] LIST OF REFERENCE NUMERALS:

[0040] 1: Fixture body 2: Lining plate 3: Screw rod

[0041] 4: Limiting plate 5: Spacer block 6: First enclosing plate

[0042] 7: Second enclosing plate 11: Chute 12: Threaded hole

[0043] 13: Chute wall 10: Blade root

[0044] 801: Slide the blade root of the turbine moving blade into the chute from one end of the chute

[0045] 802: Drive the screw to move from the threaded hole into the chute, and clamp the blade root between the lining plate and the chute wall Specific implementation mode

[0046] To make the purpose, technical solution and advantages of this application clearer, the following will further describe the implementation mode of this application in detail with reference to the drawings

[0047] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to this application

[0048] As mentioned above, when performing surface spraying treatment on the turbine moving blade, it is necessary to fix the blade root of the turbine moving blade on the turbine moving blade fixture to ensure that the turbine moving blade does not move during the surface spraying treatment process. For the current turbine moving blade fixture, after embedding the turbine moving blade into the turbine moving blade fixture, it is necessary to fix the relative position between the turbine moving blades through two screws, so that the turbine moving blade cannot slide on the turbine moving blade fixture. When fixing the relative position between the turbine moving blade and the turbine moving blade fixture through two screws, it is necessary to turn the two screws simultaneously, so that the blade root of the turbine moving blade is evenly stressed under the drive of the two screws, avoiding damage to the blade root due to unbalanced force. However, turning the two screws simultaneously has the problem of inconvenient operation, and it takes a long time to fix the turbine moving blade on the turbine moving blade fixture. Therefore, the efficiency of fixing the turbine moving blade is relatively low

[0049] In the embodiments of the present application, the turbine moving blade fixture includes a fixture body, a backing plate and a screw. A chute is provided on the fixture body, and a threaded hole is provided at the bottom of the chute. The backing plate is arranged at the bottom of the chute, and the first end of the backing plate is fixedly connected to the bottom of the chute, and the second end of the backing plate is a free end. When the blade root of the turbine moving blade slides into the chute from one end of the chute, the screw is screwed to move into the chute from the threaded hole. When the screw moves to a target position where it forms a pressing relationship with the second end of the backing plate, the second end of the backing plate fits against the blade root under the pressing of the screw, and the blade root is clamped between the backing plate and the chute wall. Thus, after the blade root of the turbine moving blade slides into the chute on the fixture body, only one screw needs to be screwed. One end of the backing plate moves towards the blade root under the pressing of the screw, and the blade root is clamped between the backing plate and the chute wall, realizing the fixation of the relative position between the turbine moving blade and the turbine moving blade fixture. Since only one screw needs to be screwed during the process of fixing the turbine moving blade, and the backing plate can apply a relatively balanced driving force to the blade root, the time required to fix the turbine moving blade on the turbine moving blade fixture can be shortened, thereby improving the efficiency of fixing the turbine moving blade.

[0050] The turbine moving blade fixture and the turbine moving blade fixing method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0051] Embodiment 1

[0052] Figure 1 and Figure 2 are schematic diagrams of a turbine moving blade fixture provided by Embodiment 1 of the present application. The turbine moving blade fixture provided by the embodiments of the present application is used to fix the turbine moving blade during the surface spraying process of the turbine moving blade. Refer to Figure 1 and Figure 2 , the turbine moving blade fixture includes: a fixture body 1, a backing plate 2 and a screw 3;

[0053] A chute 11 is provided on the fixture body 1, and a threaded hole 12 is provided at the bottom of the chute 11;

[0054] The backing plate 2 is arranged at the bottom of the chute 11, and the first end of the backing plate 2 is fixedly connected to the bottom of the chute 11, and the second end of the backing plate 2 is a free end;

[0055] When the blade root 10 of the turbine moving blade slides into the chute 11 from one end of the chute 11, and the screw 3 moves into the chute 11 from the threaded hole 12 to a target position where it forms a pressing relationship with the second end of the backing plate 2, the second end of the backing plate 2 fits against the blade root 10 under the pressing of the screw 3, and the blade root 10 is clamped between the backing plate 2 and the chute wall of the chute 11.

[0056] In the embodiment of the present application, a chute 11 is provided on the fixture body 1, and a threaded hole 12 is provided at the bottom of the chute 11. The lining plate 2 is arranged at the bottom of the chute 11. When the screw 3 moves from the threaded hole 12 into the chute 11, it will drive the lining plate 2 to move away from the bottom of the chute 11. After the blade root 10 of the turbine moving blade is slid into the chute 11 from one end of the chute 11, when the screw 3 is turned to move from the threaded hole 12 into the chute 11 to a target position where it forms a pressing relationship with the second end of the lining plate 2, one end of the lining plate 2 is pressed against the blade root 10 by the screw 3 and fits with the blade root 10, clamping the blade root 10 between the lining plate 2 and the groove wall of the chute 11, thereby fixing the turbine moving blade on the turbine moving blade fixture. It can be seen that after the blade root 10 is slid into the chute 11, only the screw 3 needs to be turned to move into the chute 11, so as to drive one end of the lining plate 2 to move towards the blade root 10 by the screw 3, clamp the blade root 10 between the lining plate 2 and the groove wall of the chute 11, and realize the fixation of the turbine moving blade. Since only one screw 3 needs to be turned during the process of fixing the turbine moving blade, the operation is more convenient, the time required to fix the turbine moving blade to the turbine moving blade fixture can be shortened, and thus the efficiency of fixing the turbine moving blade can be improved.

[0057] Figure 3 is an assembly schematic diagram of a turbine moving blade and a turbine moving blade fixture provided in Embodiment 1 of the present application. Refer to Figure 3 , the blade root 10 of the turbine moving blade is a columnar structure, the end face of the blade root 10 is a dovetail shape, and the cross-sectional shape of the chute 11 is also a dovetail shape. The cross-sectional dimension of the chute 11 is slightly larger than the end face dimension of the blade root 10, so that the blade root 10 can slide into the chute 11 from one end of the chute 11. When the blade root 10 slides into the chute 11 from one end of the chute 11, the dovetail structures on the blade root 10 and the chute 11 cooperate with each other to limit the blade root 10, so that the blade root 10 can move along the chute 11, while restricting the blade root 10 from moving in the direction perpendicular to the axis of the chute 11. When the lining plate 2 moves into the chute 11 under the drive of the screw 3, the lining plate 2 drives the blade root 10 to move away from the bottom of the chute 11. When the screw 3 moves to a target position where it forms a pressing relationship with the second end of the lining plate 2, the blade root 10 contacts the lining plate 2 and the groove wall 13 forming a dovetail structure in the chute 11 respectively, thereby clamping the blade root 10 between the lining plate 2 and the groove wall 13 and realizing the fixed connection between the turbine moving blade and the turbine moving blade fixture.

[0058] It should be noted that the blade roots of different turbine moving blades may have different shapes. The shape of the chute on the fixture body can be flexibly designed according to the shape of the blade root of the turbine moving blade. It only needs to ensure that the blade root can slide in the chute and the chute can restrict the blade root from moving in the direction perpendicular to the axis of the chute. Therefore, the present application embodiment does not limit the end face shape of the chute on the fixture body.

[0059] Embodiment 2

[0060] Figure 4 and Figure 5 FIG. is a schematic diagram of a turbine moving blade fixture provided in Embodiment 2 of the present application. In Figure 1 and Figure 2 Based on the shown turbine moving blade fixture, referring to Figure 4 and Figure 5 , the turbine moving blade fixture further includes: a limit plate 4, a spacer block 5 and a first shroud 6;

[0061] The limit plate 4 is connected to the fixture body 1 at the second end of the chute 11;

[0062] When the blade root 10 and the spacer block 5 slide into the chute 11 from the first end of the chute 11 in sequence, and the first shroud 6 is connected to the fixture body 1 at the first end of the chute 11, the blade root 10 and the spacer block 5 are limited within the chute 11, and the blade root 10 is clamped between the limit plate 4 and the spacer block 5.

[0063] In the embodiment of the present application, the limit plate 4 is connected to the fixture body 1 at the second end of the chute 11, and the limit plate 4 closes the second end of the chute 11. The blade root 10 can slide into the chute 11 from the first end of the chute 11. By closing the second end of the chute 11 with the limit plate 4, when the blade root 10 is slid into the chute 11 from the first end of the chute 11, the blade root 10 is driven to move from the first end of the chute 11 to the second end of the chute 11 until the blade root 10 contacts the limit plate 4. By providing the limit plate 4 at the second end of the chute 11, when the turbine moving blade is fixed on the turbine moving blade fixture, the blade root 10 can be pushed to slide into the chute 11 from the first end until the blade root 10 contacts the limit plate 4, so as to facilitate the positioning of the blade root 10 and further improve the efficiency of fixing the turbine moving blade.

[0064] The side surface of the limit plate 4 opposite to the fixture body 1 can be a plane or a curved surface, which can be specifically designed according to the end face of the blade root 10 so that the end face of the blade root 10 can fit with the limit plate 4.

[0065] In the embodiment of the present application, the blade root 10 is slid into the chute 11 from the first end of the chute 11, then the spacer block 5 is slid into the chute 11 from the first end of the chute 11, and then the first shroud 6 is connected to the fixture body 1 at the first end of the chute 11. The blade root 10 and the spacer block 5 are limited within the chute 11 by the first shroud 6 and the limiting plate 4, so that the blade root 10 and the spacer block 5 cannot slide out of the chute 11, thereby limiting the blade root 10 in the axial direction of the chute 11. A spacer block 5 is arranged between the blade root 10 and the first shroud 6 to reduce the space for the blade root 10 to move along the axial direction of the chute 11. When the blade root 10 moves away from the bottom of the chute 11 under the drive of the backing plate 2, one end face of the blade root 10 contacts the spacer block 5, restricting the movement of the blade root 10 along the axial direction of the chute 11, making the force on the blade root 10 more balanced, and thus reducing the probability of damage to the blade root 10 due to uneven force.

[0066] In the embodiment of the present application, the first shroud 6 can be connected to the fixture body 1 at the first end of the chute 11. The first shroud 6 can enclose the first end of the chute 11, preventing the spacer block 5 and the blade root 10 from sliding out of the first end of the chute 10, thereby limiting the blade root 10 in the axial direction of the chute 11. Additionally, after the first shroud 6 is fixed to the fixture body 1, the first shroud 6 can shield the area on the upper part of the blade root 10 that does not need to be surface sprayed, so that when the turbine moving blade is subsequently surface sprayed, the spraying material will not be sprayed onto the shielded area.

[0067] Since the first shroud 6 will bear a high temperature during the surface spraying process, the first shroud 6 is prone to deformation. By arranging a spacer block 5 between the first shroud 6 and the blade root 10, it is possible to prevent the end face of the blade root 10 from directly contacting the first shroud 6 that is prone to deformation, thereby avoiding the end face of the blade root 10 from being scratched by the first shroud 6 and ensuring the safety of the surface spraying treatment of the turbine moving blade.

[0068] In the embodiment of the present application, the first shroud 6 can be connected to the fixture body 1 by bolts, and the limiting plate 4 can be connected to the fixture body 1 by bolts.

[0069] In a possible implementation, see Figure 4 , the spacer block 5 is in a plate-like structure, and the shape of the spacer block 5 is the same as the shape of the end face of the blade root 10.

[0070] Since the spacer block 5 is arranged between the first shroud 6 and the blade root 10 and is used to reduce the space for the blade root 10 to move along the axial direction of the chute 11, designing the spacer block 5 as a plate-like structure enables the spacer block 5 to fit the end face of the blade root 10. On the one hand, it can better limit the blade root 10, and on the other hand, it can increase the contact area between the spacer block 5 and the end face of the blade root 10, reducing the probability of the end face of the blade root 10 being scratched by the spacer block 5.

[0071] Since the spacer block 5 can slide into the chute 11, the shape of the spacer block 5 is designed to be the same as the shape of the end face of the blade root 10. For example, when the end face of the blade root 10 is dovetail-shaped, the spacer block is a dovetail-shaped plate structure, so that both the spacer block 5 and the blade root 10 can fit with the chute 11, ensuring that the spacer block 5 cannot rotate in the chute 11 and further reducing the probability of the end face of the blade root 10 being scratched by the spacer block 5.

[0072] In a possible implementation, the length of the chute 11 is greater than the distance between the two end faces of the blade root 10, and the distance between the two end faces of the blade root 10 is greater than the thickness of the spacer block 5. The difference between the length of the chute 11 and the distance between the two end faces of the blade root 10 and the thickness of the spacer block 5 is less than or equal to 1.5 millimeters. Define the length of the chute 11 as L 1 , the distance between the two end faces of the blade root 10 as L 0 , and the thickness of the spacer block 5 as t, then 0 ≤ L 1 - L 0 - t ≤ 1.5 mm.

[0073] The length of the chute 11 is greater than the distance between the two end faces of the blade root 10, ensuring that the blade root 10 can completely slide into the chute 11. Making the distance between the two end faces of the blade root 10 greater than the thickness of the spacer block 5 can reduce the size of the turbine moving blade fixture, thus facilitating the installation and movement of the turbine moving blade fixture and reducing the cost of the turbine moving blade fixture. The length of the chute 11 is greater than or equal to the sum of the distance between the two end faces of the blade root 10 and the thickness of the spacer block 5, ensuring that the blade root 10 and the spacer block 5 can completely slide into the chute 11, realizing the fixation of the turbine moving blade, and ensuring that the blade root 10 can move away from the bottom of the chute 11 under the drive of the backing plate 2. The difference between the length of the chute 11 and the distance between the two end faces of the blade root 10 and the thickness of the spacer block 5 is less than or equal to 1.5 mm, avoiding a large movement space of the blade root 10 in the axial direction of the chute 11, improving the accuracy of limiting the blade root 10, and thus improving the precision of fixing the position of the turbine moving blade.

[0074] In a possible implementation, the first end of the backing plate 2 is adjacent to the first end of the chute 11, and the second end of the backing plate 2 is adjacent to the second end of the chute 11. Figure 6 is a schematic diagram of another turbine moving blade fixture provided in the second embodiment of the present application. Refer to Figure 6 , the left end of the chute 11 is the first end, the right end of the chute 11 is the second end, the left end of the backing plate 2 is the first end, and the right end of the backing plate 2 is the second end.

[0075] Since the first end of the backing plate 2 is fixedly connected to the bottom of the sliding groove 11, the second end of the backing plate 2 is a free end, and the blade root 10 slides into the sliding groove from the first end of the sliding groove 11, making the first end of the backing plate 2 adjacent to the first end of the sliding groove 11 and the second end of the backing plate 2 adjacent to the second end of the sliding groove 11. When the blade root 10 is slid into the sliding groove 11 from the first end of the sliding groove 11, the first end of the backing plate 2 fits against the bottom of the sliding groove 11, preventing the backing plate 2 from warping and obstructing the sliding of the blade root 10 into the sliding groove 11, ensuring that the blade root 10 can be smoothly slid into the sliding groove 11, and thus facilitating the fixing of the turbine moving blade on the turbine moving blade fixture.

[0076] In a possible implementation, the distance between the first end and the second end of the backing plate 2 is less than the distance between the two end faces of the blade root 10, and the distance between the second end of the backing plate 2 and the limiting plate 4 is greater than zero and less than or equal to 2 mm.

[0077] The length of the backing plate 2 is less than the distance between the two end faces of the blade root 10, so that the backing plate 2 can only contact the blade root 10 and not contact the spacer block 5, thereby driving only the blade root 10 to move through the backing plate 2 and preventing the spacer block 5 from scratching the first shroud 6 due to relative movement. The limiting plate 4 is adjacent to the second end of the backing plate 2, and the distance between the second end of the backing plate 2 and the limiting plate 4 is greater than zero and less than or equal to 2 mm, ensuring that the second end of the limiting plate 4 can move freely up and down under the drive of the screw 3. When the screw 3 is withdrawn from the threaded hole 12, the second end of the backing plate 2 can be reset under the action of the restoring elastic force of the backing plate 2 itself.

[0078] In a possible implementation, the first end of the backing plate 2 is a wedge-shaped structure. Refer to Figure 6 , the first end of the backing plate 2 is a wedge-shaped structure, and a smooth transition is formed between the first end of the backing plate 2 and the bottom of the sliding groove 11. When the blade root 10 is slid into the sliding groove 11 from the first end of the sliding groove 11, the blade root 10 can smoothly move onto the backing plate 2, thereby further improving the convenience of sliding the blade root 10 into the sliding groove 11. It should be noted that in order to prevent the first end of the backing plate 2 from warping during use, the first end of the backing plate 2 can be fixed to the bottom of the sliding groove 11 by argon arc welding or laser welding.

[0079] In a possible implementation, the backing plate 2 is a rectangular plate structure, and the backing plate 2 can be made of stainless steel or other elastic metal materials, ensuring that after the screw 3 is withdrawn from the threaded hole 12 on the bottom of the sliding groove 11, the backing plate 2 can return to the state of fitting against the bottom of the sliding groove 11, facilitating the sliding of the blade root 10 into the sliding groove 11 when the turbine moving blade is fixed again.

[0080] In a possible implementation, to prevent the spacer block 5 and the limit plate 4 from scratching the end face of the blade root 10, the surfaces of the spacer block 5 and the limit plate 4 that come into contact with the blade root 10 are smooth planes, that is, the surfaces of the spacer block 5 and the limit plate 4 that come into contact with the blade root 10 meet the preset smoothness requirements.

[0081] In a possible implementation, referring to Figure 2 and Figure 6 , the threaded hole 12 at the bottom of the chute 11 is arranged between the midpoint of the chute 11 and the second end of the chute 11. Since the first end of the backing plate 2 is fixed to the bottom of the chute 11, the second end of the backing plate 2 is a free end, and the first end of the backing plate 2 is adjacent to the first end of the chute 11, and the second end of the backing plate 2 is adjacent to the second end of the chute 11. By arranging the threaded hole 12 between the midpoint of the chute 11 and the second end of the chute 11, through the threaded fit between the screw 3 and the threaded hole 12, the backing plate 2 can be conveniently driven to move away from the bottom of the chute 11, and then the blade root 10 can be driven to move away from the bottom of the chute 11 by the backing plate 2, and the blade root 10 is clamped between the backing plate 2 and the groove wall of the chute 11 to realize the fixation of the turbine moving blade.

[0082] Embodiment III

[0083] Figure 7 is a schematic diagram of a turbine moving blade fixture provided by Embodiment III of the present application. On the basis of the turbine moving blade fixture shown in Figure 4 and Figure 5 , referring to Figure 7 , the turbine moving blade fixture further includes: a second shroud 7. The second shroud 7 is connected to the fixture body 1, and the first shroud 6 and the second shroud 7 shield the area on the blade root 10 that needs to be shielded during spraying.

[0084] There are shielding areas on the blade root 10 that do not need to be subjected to surface spraying treatment. After the blade root 10 is fixed on the fixture body 1 and the first shroud 6 and the second shroud 7 are fixedly connected to the fixture body 1, the first shroud 6 and the second shroud 7 can shield the shielding areas on the blade root 10. During subsequent surface spraying treatment of the turbine moving blade, under the shielding effect of the first shroud 6 and the second shroud 7, the spraying material will not be sprayed onto the shielding areas on the blade root 10, so as to facilitate meeting the process requirements for surface spraying treatment of the turbine moving blade.

[0085] In a possible implementation, the fixture body 1 is an overall cuboid structure, and the number of the second shrouds 7 is three. After the first shroud 6 and the three second shrouds 7 are fixed to the fixture body 1 by bolts, a cylindrical structure is formed, and the blade root 10 is surrounded by the cylindrical structure formed by the first shroud 6 and the three second shrouds 7, so as to realize shielding of the shielding areas on the blade root 10. Referring to Figure 7, the lower ends of the first enclosing plate 6 and the second enclosing plate 7 are flush with the bottom of the fixture body 1, and the upper ends of the first enclosing plate 6 and the second enclosing plate 7 are higher than the fixture body 1. When the blade root 10 is clamped between the backing plate 2 and the groove wall of the sliding groove 11, the upper ends of the first enclosing plate 6 and the second enclosing plate 7 are in contact with the flange on the blade root 10, achieving the shielding of the shielding area on the blade root 10.

[0086] It should be noted that the first enclosing plate 6 and the second enclosing plate 7 can not only shield the shielding area on the blade root 10, but also block the high temperature during the surface spraying process, reducing the erosion of the high-temperature flame flow on the fixture body 1, the spacer block 5 and the limiting plate 4 during the surface spraying process, so that the fixture body 1, the spacer block 5 and the limiting plate 4 have a longer service life.

[0087] Embodiment Four

[0088] Figure 8 is a flowchart of a method for fixing a turbine moving blade provided in Embodiment Four of the present application. The method for fixing a turbine moving blade provided in the embodiments of the present application is realized by the turbine moving blade fixing fixture provided in the above embodiments. Unless otherwise specified, the fixture body, the backing plate, the screw, the sliding groove, the threaded hole, the limiting plate, the spacer block, the first enclosing plate, the second enclosing plate and the blade root involved in the following method embodiments can be respectively the fixture body 1, the backing plate 2, the screw 3, the sliding groove 11, the threaded hole 12, the limiting plate 4, the spacer block 5, the first enclosing plate 6, the second enclosing plate 7 and the blade root 10 in the foregoing embodiments. Refer to Figure 8 , the method for fixing a turbine moving blade includes the following steps:

[0089] 801. Slide the blade root of the turbine moving blade into the sliding groove from one end of the sliding groove.

[0090] 802. Drive the screw to move from the threaded hole into the sliding groove to a target position where a pressing relationship is formed with the second end of the backing plate, so that the second end of the backing plate fits against the blade root under the pressing of the screw, and the blade root is clamped between the backing plate and the groove wall of the sliding groove.

[0091] In the embodiments of the present application, after sliding the blade root into the sliding groove on the fixture body, turn the screw to move from the threaded hole at the bottom of the sliding groove into the sliding groove, so that the screw presses the backing plate to move in the direction close to the blade root. When the screw moves to a target position where a pressing relationship is formed with the second end of the backing plate, the backing plate fits against the blade root, and the blade root is in contact with the groove wall of the sliding groove, and the blade root is clamped between the backing plate and the groove wall of the sliding groove, and the turbine moving blade is fixed on the turbine moving blade fixture. It can be seen that during the process of fixing the turbine moving blade, only the blade root of the turbine moving blade needs to be slid into the sliding groove and a screw is turned. Turning only one screw makes the operation more convenient, shortens the time required to fix the turbine moving blade to the turbine moving blade fixture, and thus can improve the efficiency of fixing the turbine moving blade.

[0092] In a possible implementation, when the turbine moving blade fixture is as Figure 4 and Figure 5 shown, including a limiting plate, a spacer block and a first shroud, the blade root of the turbine moving blade can be slid into the chute from the first end of the chute, so that the blade root contacts the limiting plate, then the spacer block is slid into the chute from the first end of the chute, and then the first shroud is connected to the fixture body at the first end of the chute, limiting the blade root and the spacer block in the chute, so that the blade root is clamped between the limiting plate and the spacer block.

[0093] Slide the blade root into the chute from the first end of the chute, so that the blade root contacts the limiting plate, then slide the spacer block into the chute, so that the spacer block contacts the blade root, and then fix the first shroud on the fixture body, limiting the blade root and the spacer block in the chute, realizing the fixation of the blade root in the axial direction of the chute, and improving the accuracy of the fixation position when fixing the turbine moving blade. Slide the blade root and the spacer block into the chute in sequence, so that the blade root contacts the limiting plate and the spacer block contacts the blade root, which can more accurately position the blade root and improve the convenience of fixing the turbine moving blade.

[0094] In a possible implementation, when the turbine moving blade fixture is as Figure 7 shown, including a second shroud, after fixing the first shroud on the fixture body, fix the second shroud on the fixture body to shield the shielded area on the blade root through the first shroud and the second shroud, ensuring that when performing surface spraying treatment on the turbine moving blade subsequently, the spraying material will not be sprayed onto the shielded area on the blade root.

[0095] It should be noted that the turbine moving blade fixing method provided in the embodiments of the present application is implemented based on the turbine moving blade fixtures provided in the foregoing embodiments. For the specific implementation steps of the turbine moving blade fixing method, reference can be made to the descriptions in the foregoing embodiments of each turbine moving blade fixture, and details will not be elaborated herein.

[0096] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0097] Finally, it should be noted that the above is only a preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

1. Turbine moving blade fixture, which is used to fix the turbine moving blade during the spraying process on the surface of the turbine moving blade. Characterized in that, The turbine moving blade fixture includes: a fixture body (1), a backing plate (2) and a screw (3); A chute (11) is provided on the fixture body (1), and a threaded hole (12) is provided at the bottom of the chute (11); The backing plate (2) is arranged at the bottom of the chute (11), and the first end of the backing plate (2) is fixedly connected to the bottom of the chute (11), and the second end of the backing plate (2) is a free end; When the blade root (10) of the turbine moving blade slides into the chute (11) from one end of the chute (11), and the screw (3) moves from the threaded hole (12) into the chute (11) to a target position where it forms a pressing relationship with the second end of the backing plate (2), the second end of the backing plate (2) fits against the blade root (10) under the pressing of the screw (3), and the blade root (10) is clamped between the backing plate (2) and the wall of the chute (11).

2. The turbine moving blade fixture according to claim 1, Characterized in that, The turbine moving blade fixture includes: a limit plate (4), a spacer block (5) and a first enclosure plate (6); The limit plate (4) is connected to the fixture body (1) at the second end of the chute (11); When the blade root (10) and the spacer block (5) slide into the chute (11) from the first end of the chute (11) in sequence, and the first enclosure plate (6) is connected to the fixture body (1) at the first end of the chute (11), the blade root (10) and the spacer block (5) are limited in the chute (11), and the blade root (10) is clamped between the limit plate (4) and the spacer block (5).

3. The turbine moving blade fixture according to claim 2, Characterized in that, The spacer block (5) is of a plate-like structure, and the shape of the spacer block (5) is the same as the end face shape of the blade root (10).

4. The turbine moving blade fixture according to claim 3, Characterized in that, The length of the chute (11) is greater than the distance between the two end faces of the blade root (10), and the distance between the two end faces of the blade root (10) is greater than the thickness of the spacer block (5); The difference between the length of the chute (11) and the distance between the two end faces of the blade root (10) and the thickness of the spacer block (5) is less than or equal to 1.5 millimeters.

5. The turbine moving blade fixture according to claim 2, Characterized in that, The turbine moving blade fixture includes: a second enclosure plate (7); The second enclosure plate (7) is connected to the fixture body (1), and the first enclosure plate (6) and the second enclosure plate (7) shield the area on the blade root (10) that needs to be shielded during spraying.

6. The turbine moving blade fixture according to claim 2, Characterized in that, The first end of the backing plate (2) is adjacent to the first end of the chute (11), and the second end of the backing plate (2) is adjacent to the second end of the chute (11).

7. The turbine moving blade fixture according to claim 6, characterized in that, the distance between the first end and the second end of the backing plate (2) is less than the distance between the two end faces of the blade root (10), and the distance between the second end of the backing plate (2) and the limiting plate (4) is greater than zero and less than or equal to 2 millimeters.

8. The turbine moving blade fixture according to claim 6, characterized in that, the first end of the backing plate (2) is a wedge-shaped structure.

9. The turbine moving blade fixture according to any one of claims 1 to 8, characterized in that, the threaded hole (12) is arranged between the midpoint of the chute (11) and the second end of the chute (11).

10. A method for fixing a turbine moving blade based on the turbine moving blade fixture according to any one of claims 1 to 9, characterized in that, comprising: sliding the blade root (10) of the turbine moving blade into the chute (11) from one end of the chute (11); driving the screw rod (3) to move from the threaded hole (12) into the chute (11) to a target position where a pressing relationship is formed with the second end of the backing plate (2), so that the second end of the backing plate (2) is pressed against the blade root (10) under the pressing of the screw rod (3), and clamping the blade root (10) between the backing plate (2) and the groove wall of the chute (11).

11. The method according to claim 10, characterized in that, when the turbine moving blade fixture includes a limiting plate (4), a spacer block (5) and a first shroud (6), the sliding the blade root (10) of the turbine moving blade into the chute (11) from one end of the chute (11) includes: sliding the turbine moving blade into the chute (11) from the first end of the chute (11) so that the blade root (10) contacts the limiting plate (4); before driving the screw rod (3) to move from the threaded hole (12) into the chute (11) to a target position where a pressing relationship is formed with the second end of the backing plate (2), it includes: sliding the spacer block (5) into the chute (11) from the first end of the chute (11); connecting the first shroud (6) to the fixture body (1) at the first end of the chute (11), limiting the blade root (10) and the spacer block (5) in the chute (11), and clamping the blade root (10) between the limiting plate (4) and the spacer block (5).

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