A turbine blade root clamping tool

Abstract

The utility model discloses a kind of blade root clamping tool of steam turbine blade, two risers are symmetrically provided on bottom plate upper surface, adjusting assembly has two and is matched with the riser of two sides respectively, the outer side of the slide of adjusting assembly is connected with guide rod and connecting sleeve, guide rod and the guide hole of riser are guided cooperation, screw and the screw hole cooperation of corresponding riser, screw one end is rotatably connected with the connecting sleeve of the outer side of slide by cylinder and limit pin, the inner side of the slide of adjusting assembly located left side is provided with left clamping plate by at least two bolts, the inner side of the slide of adjusting assembly located right side is provided with right clamping plate by at least two bolts, left clamping plate and right clamping plate inner side are all provided with blade root positioning groove, the utility model is reasonable in structure, left clamping plate and right clamping plate with blade root positioning groove clamping blade root part, greatly improve the stability of blade root clamping, and can be replaced according to different blade root, greatly improve scope and flexibility.

Description

Technical Field

[0001] This utility model relates to the field of clamping tooling technology, specifically to a blade root clamping tooling for steam turbine blades. Background Technology

[0002] The term "steel blade" refers to the steel used for both the moving and stationary blades in a steam turbine. Blades are critical components of a steam turbine, and among the most delicate and important. They withstand extremely harsh conditions, including high temperature, high pressure, immense centrifugal force, steam force, steam excitation force, corrosion and vibration, and the erosion from water droplets in wet steam zones. Their aerodynamic performance, machining geometry, surface roughness, installation clearance, operating conditions, and scaling all affect the turbine's efficiency and output; their structural design, vibration intensity, and operating mode have a decisive impact on the unit's safety and reliability.

[0003] When turbine blades are precision machined, the blade root is usually clamped by a clamping fixture to achieve the precision machining of the blade. Existing blade root clamping fixtures generally use two clamping plates with anti-slip textures on the clamping surfaces to clamp the blade root. However, this clamping structure has poor stability. Therefore, there is an urgent need for an improved technology to solve this problem in the existing technology. Utility Model Content

[0004] The purpose of this utility model is to provide a blade root clamping fixture for steam turbine blades. By clamping the blade root part with a left clamping plate and a right clamping plate with blade root positioning grooves, the stability of blade root clamping is greatly improved. Moreover, it can be replaced according to different blade roots, greatly improving the scope of application and flexibility, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a turbine blade root clamping fixture, comprising a base plate, upright plates, adjusting components, a left clamping plate, and a right clamping plate. Two upright plates are symmetrically arranged on the upper surface of the base plate. Each upright plate has screw holes and several guide holes. Two adjusting components are provided, each engaging with one of the upright plates on each side. Each adjusting component includes a sliding plate, a connecting sleeve, a screw, and a guide rod. The outer side of the sliding plate is connected to the guide rod and the connecting sleeve. The guide rod engages with the guide holes of the corresponding upright plates. The screw and... Corresponding to the screw hole of the upright plate, one end of the screw is provided with a cylinder, which is inserted into the connecting sleeve. The cylinder has an annular groove along the circumferential direction. The connecting sleeve is provided with several limiting pins, and the ends of the limiting pins are limited to fit with the annular groove. The inner side of the sliding plate of the adjustment component on the left is provided with a left clamping plate by at least two bolts. The inner side of the sliding plate of the adjustment component on the right is provided with a right clamping plate by at least two bolts. Both the left and right clamping plates have blade root positioning grooves on their inner sides.

[0006] Preferably, the turbine blade root clamping fixture provided by this utility model has an internal hexagonal head at the outer end of each screw.

[0007] Preferably, the present invention provides a turbine blade root clamping fixture, wherein reinforcing plates are provided on both sides of the vertical plate, and the bottom of the reinforcing plates are connected to the base plate.

[0008] Preferably, the present invention provides a turbine blade root clamping fixture, wherein the base plate has a plurality of fixing holes.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] The sliding plates of the two adjustment components are respectively equipped with a left clamping plate and a right clamping plate. The left and right clamping plates cooperate with the blade root through the blade root positioning groove, thereby greatly improving the stability of the blade root clamping and ensuring the machining accuracy of the blade. In addition, the left and right clamping plates are connected to the sliding plates of the two adjustment components by bolts, which is convenient for disassembly and can be replaced according to different blade roots, greatly improving the applicability and flexibility. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a top view of the structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the screw structure.

[0014] In the diagram: 1. Base plate; 2. Vertical plate; 3. Left clamping plate; 4. Right clamping plate; 5. Slide plate; 6. Connecting sleeve; 7. Screw; 8. Guide rod; 9. Cylinder; 10. Annular groove; 11. Limiting pin; 12. Leaf root positioning groove; 13. Hexagonal head; 14. Reinforcing plate; 15. Fixing hole. Detailed Implementation

[0015] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Please see Figure 1-3 This utility model provides a technical solution: a blade root clamping fixture for steam turbine blades, including a base plate 1, upright plates 2, adjusting components, a left clamping plate 3, and a right clamping plate 4. Two upright plates 2 are symmetrically arranged on the upper surface of the base plate 1. Reinforcing plates 14 are provided on both sides of the upright plates 2, with their bottoms connected to the base plate 1 to ensure the structural strength of the upright plates 2. The upright plates 2 have screw holes and several guide holes. There are two adjusting components, each cooperating with one of the upright plates 2. Each adjusting component includes a sliding plate 5, a connecting sleeve 6, a screw 7, and a guide rod 8. The guide rod 8 and connecting sleeve 6 are connected to the outer side of the sliding plate 5. The guide rod 8 is guided and engaged with the guide hole of the corresponding upright plate 2. The screw 7 is engaged with the screw hole of the corresponding upright plate 2. A cylinder 9 is provided at one end of the screw 7, and the cylinder 9 is inserted into the connecting sleeve 4. The sleeve 6 and the cylinder 9 are provided with an annular groove 10 along the circumference. The connecting sleeve 6 is provided with several limiting pins 11. The ends of the limiting pins 11 are engaged with the annular groove 10 for limiting. The outer end of the screw 7 is provided with an internal hexagon head 13 so that the position of the slide plate 5 can be adjusted by rotating the screw 7 through the engagement of the hexagon wrench with the internal hexagon head 13. The slide plate 5 of the adjustment component on the left is provided with a left clamping plate 3 by at least two bolts, and the slide plate 5 of the adjustment component on the right is provided with a right clamping plate 4 by at least two bolts. The inner sides of the left clamping plate 3 and the right clamping plate 4 are provided with leaf root positioning grooves 12. The base plate 1 is provided with several fixing holes 15. The base plate 1 is connected to the worktable by the engagement of the fixing holes 15 with the bolts.

[0018] Assembly method and operating principle: Based on the blade to be processed, select two suitable left clamping plates 3 and right clamping plates 4. Secure the left clamping plate 3 to the sliding plate 5 of the left-side adjustment component using bolts. Secure the right clamping plate 4 to the sliding plate 5 of the right-side adjustment component using bolts. Pass the guide rods 8 of the sliding plate 5 through the guide holes of the upright plate 2. Then, engage the screw 7 with the screw hole of the upright plate 2 and insert the cylinder 9 at the end of the screw 7 into the connecting sleeve 6. Use the limiting pin 11 to engage with the annular groove 10 of the cylinder 9 to prevent the cylinder 9 from detaching from the connecting sleeve 6, thus completing the assembly. In use, install the base plate 1 on the surface of the workbench using bolts. Place the blade root between the left clamping plate 3 and the right clamping plate 4. Rotate the screws 7 on both sides, causing the sliding plates 5 on both sides to move the left clamping plate 3 and the right clamping plate 4 closer together. This causes the blade root positioning grooves 12 of the left clamping plate 3 and the right clamping plate 4 to engage with both sides of the blade root, thereby clamping the blade root. This utility model has a reasonable structure. The slide plates 5 of the two adjustment components are respectively equipped with a left clamping plate 3 and a right clamping plate 4. The left clamping plate 3 and the right clamping plate 4 cooperate with the blade root through the blade root positioning groove 12, thereby greatly improving the stability of the blade root clamping and ensuring the processing accuracy of the blade. In addition, the left clamping plate 3 and the right clamping plate 4 are respectively connected to the slide plates 5 of the two adjustment components with bolts, which is convenient for disassembly. Thus, they can be replaced according to different blade roots, greatly improving the applicability and flexibility.

[0019] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0020] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A blade root clamping fixture for steam turbine blades, characterized in that: The system includes a base plate (1), upright plates (2), adjustment components, a left clamping plate (3), and a right clamping plate (4). Two upright plates (2) are symmetrically arranged on the upper surface of the base plate (1). Each upright plate (2) has screw holes and several guide holes. Two adjustment components are provided, each engaging with one of the upright plates (2). Each adjustment component includes a sliding plate (5), a connecting sleeve (6), a screw (7), and a guide rod (8). The outer side of the sliding plate (5) is connected to the guide rod (8) and the connecting sleeve (6). The guide rod (8) engages with the guide hole of the corresponding upright plate (2). The screw (7) engages with the screw hole of the corresponding upright plate (2). A cylinder (9) is provided at one end, and the cylinder (9) is inserted into the connecting sleeve (6). The cylinder (9) has an annular groove (10) along the circumferential direction. The connecting sleeve (6) is provided with a plurality of limiting pins (11). The ends of the limiting pins (11) are limited and engaged with the annular groove (10). The sliding plate (5) of the adjustment component on the left side is provided with a left clamping plate (3) by at least two bolts. The sliding plate (5) of the adjustment component on the right side is provided with a right clamping plate (4) by at least two bolts. The blade root positioning groove (12) is provided on the inner side of both the left clamping plate (3) and the right clamping plate (4).

2. The turbine blade root clamping fixture according to claim 1, characterized in that: The outer end of each screw (7) is provided with an internal hexagonal head (13).

3. The turbine blade root clamping fixture according to claim 1, characterized in that: The upright plate (2) is provided with reinforcing plates (14) on both sides, and the bottom of the reinforcing plates (14) is connected to the bottom plate (1).

4. The turbine blade root clamping fixture according to claim 1, characterized in that: The base plate (1) has several fixing holes (15).

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