Fixing device for steam turbine blade machining

Abstract

The utility model belongs to the technical field of turbine blade machining and manufacturing, and particularly discloses a fixing device for turbine blade machining, which comprises a workbench, a gear, a lower clamp, an upper clamp and a lifting assembly are sequentially distributed on the workbench from bottom to top, the axial lower end of the gear is rotatably connected with the workbench, and the axial upper end of the gear is fixedly connected with the lower clamp. A hydraulic cylinder and a rack fixedly connected with the hydraulic cylinder are further horizontally arranged on the workbench, the rack is meshed with the gear, the upper clamp is rotationally connected with the lifting assembly, a plurality of protruding first protruding blocks used for positioning the turbine blade are arranged on the lower clamp, and the upper clamp protrudes downwards to form second protruding blocks matched with the first protruding blocks. When the first protruding block and the second protruding block are clamped to the two end faces of the steam turbine blade correspondingly, the upper clamp and the lower clamp rotate synchronously at the moment. The blades in all the fixing structures are synchronously rotated, the blades can conveniently face the spray head at the same angle, manual adjustment is not needed, and the blade batch synchronous spraying effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine blade processing and manufacturing, and particularly relates to a fixing device for processing steam turbine blades. Background Technique

[0002] With the improvement of the efficiency of gas turbines, the operating conditions of gas turbines are becoming more and more demanding, and the technical requirements for the blade surface coating technology of the compressor part are constantly increasing. The spraying method and surface quality of the anti-fretting wear coating and inorganic anti-corrosion coating on the blade have been improved by two grades, and the roughness has been improved from Ra1.0 to Ra0.3.

[0003] During the processing of the blade spray coating, the two ends are often fixed. According to the spraying posture of the blade, there are two fixing methods:

[0004] First, horizontal fixing: Clamps are used to hold both ends of the blade respectively, so that the blade is horizontally suspended above the workbench. While spraying the coating, the two clamps and the blade are slowly rotated by a motor. However, the part of the blade outside blocked by the clamp cannot be sprayed, resulting in dead angles, so it is not often used.

[0005] Second, vertical fixing: The blade is placed vertically, and two clamps are used to press tightly from above and below respectively, and the blade is locked by the friction action. The center of gravity of the blade falls on the vertical plane where the two clamps are located and can be stably supported to fix the blade during spraying. The clamp and the blade can also be rotated by a motor.

[0006] When the existing steam turbine blades are vertically sprayed, multiple blades are often arranged horizontally side by side and sprayed simultaneously by multiple nozzles to increase the output. During this process, the blades need to be positioned and fixed by clamps. The multiple blades and the corresponding clamps are independently rotated by motors respectively, and it is very difficult to move synchronously. The multiple nozzles are displaced synchronously by the lifting rods, resulting in deviations of different blades relative to the nozzles, and manual adjustment is often required, resulting in an unsatisfactory effect of batch fixing and synchronous spraying of the blades. Therefore, we provide a fixing device for processing steam turbine blades. Content of the Utility Model

[0007] Aiming at the unsatisfactory effect of synchronous spraying of the fixed steam turbine blades in the above-mentioned prior art, the utility model provides a fixing device for processing steam turbine blades. Through the setting of this solution, the synchronous rotation of multiple steam turbine blades can be realized, and each part of the steam turbine blades can be evenly sprayed, thereby improving the spraying effect.

[0008] To solve the above technical problems, the present utility model adopts the following technical solutions: A fixing device for machining steam turbine blades, comprising a workbench, on which a gear, a lower clamp, an upper clamp and a lifting assembly are sequentially distributed from bottom to top. The lower end of the gear shaft is rotatably connected to the workbench, and the upper end of the gear shaft is fixedly connected to the lower clamp. A hydraulic cylinder and a rack fixedly connected to the hydraulic cylinder are also horizontally arranged on the workbench. The rack and the gear are meshed with each other, and the rack and the gear are configured such that the linear motion of the rack drives the rotational motion of the gear. The upper clamp is rotatably connected to the lifting assembly. The lower clamp has a plurality of protruding first bumps for positioning the steam turbine blades. The upper clamp protrudes downward to form a second bump that cooperates with the first bump. When the first bump and the second bump respectively clamp the two end faces of the steam turbine blade, the upper clamp and the lower clamp rotate synchronously.

[0009] Further, the lifting assembly includes a mounting frame fixed to the workbench and a vertical cylinder fixedly connected to the mounting frame. The output end of the vertical cylinder passes through the mounting frame and is rotatably connected to the upper clamp.

[0010] Furthermore, the upper clamp is a second rectangular plate, and the second rectangular plate rotates synchronously with the fixedly connected gear. The second bumps are evenly distributed along the length direction of the second rectangular plate.

[0011] Furthermore, an elastic gasket is provided at the bottom end of the second bump.

[0012] Further, a rotating shaft is vertically fixed to the side of the second rectangular plate facing away from the second bump. The end of the rotating shaft away from the upper clamp is rotatably connected to the output end of the vertical cylinder.

[0013] Further, rib plates are symmetrically provided between both sides of the rotating shaft and the first rectangular plate.

[0014] Further, the lower clamp is a first rectangular plate, and the first rectangular plate rotates synchronously with the fixedly connected gear. The first bumps are evenly distributed along the length direction of the first rectangular plate.

[0015] Further, a slide rail fixedly connected to the workbench is slidably mounted on the lower surface of the rack.

[0016] In summary, the present utility model has the following beneficial effects:

[0017] (1) The utility model consists of a lower fixture and an upper fixture to form a fixed structure, and multiple fixed structures are horizontally arrayed on the workbench. When spraying and processing steam turbine blades, the lifting assembly raises the corresponding upper fixture, opens the fixed structure to place the blade vertically, then lowers the upper fixture to cooperate with the lower fixture to clamp, and vertically fixes the blade by means of frictional force, so that the center of gravity of the blade falls on the plane where the lower fixture and the upper fixture are located. Start multiple nozzles to spray the coating towards the corresponding blades, and drive multiple gears to rotate simultaneously by the forward translation of the rack through the hydraulic cylinder, so as to synchronously rotate the blades in each fixed structure, which is convenient for the blades to face the nozzles at the same angle without manual adjustment, thereby improving the batch synchronous spraying effect of the blades.

[0018] (2) The first convex blocks and the second convex blocks protruding from the lower fixture and the upper fixture clamp the steam turbine blade. At this time, the first convex block and the second convex block respectively abut against the wall of the steam turbine blade to form clamping. Since both the upper fixture and the lower fixture can rotate, the linear motion of the rack drives the rotation of the gear, so that the steam turbine blade, the upper fixture and the lower fixture rotate synchronously, which is convenient for the blade to face the nozzle at the same angle. Description of the Drawings

[0019] Figure 1 is the front view of the fixed structure of the present utility model;

[0020] Figure 2 is the front view of the gear of the present utility model;

[0021] Figure 3 is the front view of the upper fixture of the present utility model;

[0022] Figure 4 is the top view of the rack of the present utility model.

[0023] Among them, the description of the reference numerals is as follows:

[0024] 1. Workbench; 2. Gear; 3. Lower fixture; 4. Upper fixture; 5. Hydraulic cylinder; 6. Rack; 7. Installation frame; 8. Vertical cylinder; 9. Elastic gasket; 10. Rib plate; 11. Rotating shaft; 12. Slide rail; 13. First rectangular plate; 14. Second rectangular plate; 15. First convex block; 16. Second convex block. Specific Embodiment

[0025] The following further details the present utility model in conjunction with the embodiments.

[0026] During specific implementation, as Figures 1-4As shown in the figure, a fixing device for machining steam turbine blades includes a workbench 1. A gear 2, a lower clamp 3, an upper clamp 4, and a lifting assembly are sequentially distributed on the workbench 1 from bottom to top. The lower end of the gear 2 in the axial direction is rotatably connected to the workbench 1, and the upper end of the gear 2 in the axial direction is fixedly connected to the lower clamp 3. A hydraulic cylinder 5 and a rack 6 fixedly connected to the hydraulic cylinder 5 are also horizontally arranged on the workbench 1. The rack 6 and the gear 2 are meshed with each other. The rack 6 and the gear 2 are configured such that the linear motion of the rack 6 drives the rotational motion of the gear 2. The upper clamp 4 is rotatably connected to the lifting assembly. The lower clamp 3 has a plurality of protruding first bumps 15 for positioning the steam turbine blades. The upper clamp 4 protrudes downward to form a second bump 16 that cooperates with the first bump 15. When the first bump 15 and the second bump 16 respectively clamp the side wall of the steam turbine blade, the upper clamp 4 and the lower clamp 3 rotate synchronously at this time.

[0027] A fixing structure is composed of the lower clamp 3 and the upper clamp 4, and a plurality of fixing structures are horizontally arranged in an array on the workbench 1. During the spraying process of the steam turbine blades, the lifting assembly lifts the corresponding upper clamp 4, opens the fixing structure to place the blades vertically, then lowers the upper clamp 4 to cooperate with the lower clamp 3 to clamp both end faces of the blades, and uses the frictional force to fix the blades vertically. There is no obstruction to the outside of the blades, so that the center of gravity of the blades falls on the plane where the lower clamp 3 and the upper clamp 4 are located. Start multiple nozzles to spray the coating towards the corresponding blades, and drive the multiple gears 2 to rotate simultaneously by translating the rack 6 forward through the hydraulic cylinder 5, so as to synchronously rotate the blades in each fixing structure, which is convenient for the blades to face the nozzles at the same angle without manual adjustment, thereby improving the batch synchronous spraying effect of the blades, and significantly reducing the dead corners of the sprayed coating on the blades.

[0028] Among them, the gear 2 is rotatably connected to the upper surface of the workbench 1 through a bearing, which significantly increases the support surface of the gear 2 and facilitates the stable rotation of the gear 2. When clamping the blades, the lower clamp 3 and the upper clamp 4 can be vertically aligned first to increase the support area between the fixing structure and the blades.

[0029] As Figure 1 shown in the figure, the lifting assembly includes a mounting frame 7 fixed to the workbench 1 and a vertical cylinder 8 fixedly connected to the mounting frame 7. The output end of the vertical cylinder 8 passes through the mounting frame 7 and is rotatably connected to the upper clamp 4. The vertical cylinder 8 is used to lift and lower the upper clamp 4 at the same height and is supported by the mounting frame 7, which is convenient for vertically aligning and fixing the structure.

[0030] As Figure 2 and Figure 3As shown, the upper fixture 4 is a second rectangular plate 14 in a rectangular shape, which rotates synchronously with the connected gear 2, and the second protrusions 16 are evenly distributed along the length direction of the second rectangular plate 14. The bottom end of the second protrusion 16 is provided with an elastic gasket 9, which is preferably made of fluororubber and has good corrosion resistance to paint. After the upper fixture 4 is lowered, the elastic gasket 9 is driven to press the end face of the blade, and the deformation of the elastic gasket 9 is used for buffering to avoid hard collision. The lower fixture 3 is a first rectangular plate 13 in a rectangular shape, which rotates synchronously with the connected gear 2, and the first protrusions 15 are evenly distributed along the length direction of the first rectangular plate 13.

[0031] As shown Figure 3 As shown, a rotating shaft 11 is vertically fixed on one side of the second rectangular plate 14 away from the second protrusion 16. The end of the rotating shaft 11 away from the upper clamp 4 is rotatably connected to the output end of the vertical cylinder 8. Ribs 10 are symmetrically arranged between the two sides of the rotating shaft 11 and the second rectangular plate. The rotating shaft 11 and the corresponding gear 2 are coaxial. The end of the rotating shaft 11 away from the upper clamp 4 is rotatably connected to the output end of the vertical cylinder 8. The other end of the rotating shaft 11 is fixedly connected to the upper surface of the upper clamp 4. After the hydraulic cylinder 5 is started, it drives the fixed structure to rotate around the rotating shaft 11 and leaves space for the two inclined plates to avoid the two inclined plates from hitting the mounting frame 7 after they are raised. Two symmetrical inclined plates are fixed on the upper surface of the upper clamp 4 to reinforce the upper clamp 4 and reduce the degree of deformation caused by the extrusion effect at the upper clamp 4 away from the corresponding vertical cylinder 8.

[0032] like Figure 1 and Figure 4 As shown, a slide rail 12 fixedly connected to the workbench 1 is slidably mounted on the lower surface of the rack 6. The slide rail 12 limits the rack 6 so that the rack 6 is always tightly engaged with the gear 2 to avoid invalid rotation.

[0033] The working principle of the utility model is as follows: a fixed structure is composed of a lower clamp 3 and an upper clamp 4, and a plurality of fixed structures are distributed in a horizontal array on a workbench 1. When the turbine blade is sprayed, the lifting component lifts the corresponding upper clamp 4, opens the fixed structure to vertically place the blade, and then lowers the upper clamp 4 to cooperate with the lower clamp 3 to clamp, and uses friction to vertically fix the blade so that the center of gravity of the blade falls on the plane where the lower clamp 3 and the upper clamp 4 are located.

[0034] Then start multiple nozzles to spray coatings on the corresponding blades, and use the hydraulic cylinder 5 to translate the rack 6 in the positive direction to drive multiple gears 2 to rotate simultaneously, which can synchronously rotate the blades in each fixed structure, so that the blades can face the nozzles at the same angle without manual adjustment.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fixing device for machining steam turbine blades, comprising a workbench (1), on which a gear (2), a lower fixture (3), an upper fixture (4) and a lifting assembly are sequentially distributed from bottom to top. The lower end of the gear (2) in the axial direction is rotatably connected to the workbench (1), and the upper end of the gear (2) in the axial direction is fixedly connected to the lower fixture (3). A hydraulic cylinder (5) and a rack (6) fixedly connected to the hydraulic cylinder (5) are further horizontally arranged on the workbench (1). The rack (6) and the gear (2) are meshed with each other, and the rack (6) and the gear (2) are configured such that the linear motion of the rack (6) drives the rotational motion of the gear (2). It is characterized in that, The upper clamp (4) is rotatably connected to the lifting assembly, and the lower clamp (3) has a plurality of protruding first protrusions (15) for positioning the turbine blades. The upper clamp (4) protrudes downward to form second protrusions (16) that cooperate with the first protrusions (15). When the first protrusions (15) and the second protrusions (15) are respectively clamped on the two end surfaces of the turbine blade, the upper clamp (4) and the lower clamp (3) rotate synchronously.

2. The fixing device for machining steam turbine blades according to claim 1, characterized in that, The lifting assembly comprises a mounting frame (7) fixed on the workbench (1) and a vertical cylinder (8) fixedly connected to the mounting frame (7); an output end of the vertical cylinder (8) passes through the mounting frame (7) and is rotatably connected to the upper clamp (4).

3. The fixing device for machining steam turbine blades according to claim 2, characterized in that, The upper clamp (4) is a second rectangular plate (14) in a rectangular shape. The second rectangular plate (14) rotates synchronously with the connected gear (2). The second protrusions (16) are evenly distributed along the length direction of the second rectangular plate (14).

4. The fixing device for machining steam turbine blades according to claim 3, characterized in that, An elastic gasket (9) is provided at the bottom end of the second protrusion (16).

5. The fixing device for machining steam turbine blades according to claim 3, characterized in that, A rotating shaft (11) is vertically fixed to a side of the second rectangular plate (14) that is away from the second protrusion (16), and an end of the rotating shaft (11) that is away from the upper clamp (4) is rotatably connected to an output end of the vertical cylinder (8).

6. The fixing device for machining steam turbine blades according to claim 5, characterized in that, Ribs (10) are symmetrically provided between the two sides of the rotating shaft (11) and the second rectangular plate.

7. The fixing device for machining steam turbine blades according to claim 1, characterized in that, The lower clamp (3) is a first rectangular plate (13) in a rectangular shape. The first rectangular plate (13) rotates synchronously with the connected gear (2). The first protrusions (15) are evenly distributed along the length direction of the first rectangular plate (13).

8. The fixing device for machining steam turbine blades according to claim 1, characterized in that, A slide rail (12) fixedly connected to the workbench (1) is slidably mounted on the lower surface of the rack (6).

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