Stationary blade ring blade assembling device and stationary blade ring blade assembling method

Abstract

The invention relates to the technical field of steam turbine manufacturing, and discloses a stationary blade ring blade assembling device and a stationary blade ring blade assembling method.The stationary blade ring blade assembling device comprises a working platform, a stationary blade ring radial locking mechanism, a stationary blade ring axial locking mechanism and a blade pressing-in mechanism. According to the stationary blade ring blade assembling device, the blade is automatically installed on the stationary blade ring, the force and position accuracy in the assembling process is guaranteed, the stability and reliability of assembling of the blade and the stationary blade ring are improved, on the basis, the assembling efficiency is greatly improved through the stationary blade ring blade assembling method, the blade and the stationary blade ring are prevented from being damaged, and the production cost is reduced. And the yield is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine manufacturing, and in particular to a stationary blade ring blade assembly device and a stationary blade ring blade assembly method. Background Art

[0002] During the production or repair process of the turbine stator ring, the blades of a circle need to be assembled, and the root tooth-shaped part of a single blade needs to be inserted into the wheel groove for positioning and pressing. The pressure of the blade installation needs to be controlled within a reasonable range to ensure the qualified installation of the blade. Many factories still use physical knocking to assemble. Manual assembly cannot detect whether the size of the root tooth-shaped part and the stator ring groove is reasonable. At the same time, the knocking process will have the risk of damaging the blade and the stator ring.

[0003] How to solve the problem of precise control of force and position during the assembly of stationary blade rings and how to improve the stability and reliability of assembly has become a technical problem in the assembly of stationary blade rings and blades. Summary of the invention

[0004] The object of the present invention is to provide a stationary blade ring and blade assembly device and a stationary blade ring and blade assembly method to solve the problems in the above-mentioned background technology.

[0005] To achieve the above object, on the one hand, the present invention adopts the following technical solutions:

[0006] A stationary blade ring and blade assembly device comprises a working platform, a stationary blade ring radial locking mechanism, a stationary blade ring axial locking mechanism and a blade pressing mechanism, wherein:

[0007] Several stationary blade ring radial locking mechanisms are evenly distributed around the central circumference of the working platform, and each stationary blade ring radial locking mechanism can synchronously approach or move away from the center of the working platform to radially lock the stationary blade ring to be assembled or release the assembled stationary blade ring;

[0008] The stationary blade ring axial locking mechanism is arranged on each stationary blade ring radial locking mechanism, and the stationary blade ring radial locking mechanism is used to axially lock the radially locked stationary blade ring on the working platform;

[0009] The blade pressing mechanism is located on one side of the working platform, and is used to press the blades at the set positions on the stationary blade ring into place.

[0010] As an optional solution, the radial locking mechanism of the stationary blade ring includes a bearing platform, the bottom of the bearing platform is slidably matched with the surface of the working platform, and a rotating screw is provided on the working platform, and a first nut which is threadably matched with the rotating screw is provided on the bearing platform, the stationary blade ring is placed on the bearing platform, and a support seat is provided on the bearing platform and located on the outer side of the stationary blade ring, and a limit rod which contacts the side surface of the stationary blade ring is provided on the support seat.

[0011] As an optional solution, four radial locking mechanisms for the stationary blade ring are provided, and the four rotating screws extend respectively to the center of the working platform, and a bevel gear is provided at the end of each rotating screw. The four bevel gears are meshed in sequence, so that the four support platforms move synchronously.

[0012] As an optional solution, the axial locking mechanism of the stationary blade ring includes a downward pressure cylinder, which is installed on the support seat and located above the stationary blade ring. The output rod of the downward pressure cylinder faces downward, and a pressure block in contact with the upper surface of the stationary blade ring is provided on the output rod of the downward pressure cylinder.

[0013] As an optional solution, the stationary blade ring blade assembly device also includes a stationary blade ring axial support mechanism, which includes a lifting cylinder. A concave cavity is opened on the surface of the bearing platform that supports the stationary blade ring. The lifting cylinder is installed on the bearing platform, and a roller located in the concave cavity is arranged on the output rod of the lifting cylinder; the lifting cylinder is used to drive the roller to be higher than the bearing platform and lift the stationary blade ring, and the roller is in rolling contact with the lower surface of the stationary blade ring; the lifting cylinder is also used to drive the roller to sink into the concave cavity and make the stationary blade ring fall on the bearing platform.

[0014] As an optional solution, the blade pressing mechanism includes a mounting plate, on which are provided two oppositely arranged pressing heads and a first pressing cylinder and a second pressing cylinder; the first pressing cylinder is used to drive a pressing head to press the first side of the blade to be assembled and push the blade to a set position; the second pressing cylinder is used to drive another pressing head to move to the second side of the blade at the set position; the two pressing heads cooperate to limit the two sides of the blade, and the inclination angle of the two pressing heads is consistent with the pressing angle of the blade.

[0015] As an optional solution, the blade pressing mechanism also includes a support frame and a lifting seat, the lifting seat is slidably matched with the support frame, a vertically arranged fixed screw is provided on the lifting seat, a second nut matched with the fixed screw is provided on the support frame, a rotating motor is provided on the lifting seat, the mounting plate is fixed on the output shaft of the rotating motor, and the rotating motor is used to drive the mounting plate to rotate in a vertical plane perpendicular to the stationary blade ring.

[0016] As an optional solution, the lifting seat is provided with an arc edge, the center of the arc edge is located at the output shaft of the rotating motor, and the mounting plate is provided with a brake assembly acting on the arc edge, and the brake assembly is used to limit the rotation of the mounting plate.

[0017] As an optional solution, a slide rail is provided under the working platform, and the slide rail is arranged toward the blade pressing mechanism. The working platform can slide along the slide rail, so that the relative position of the stationary blade ring and the blade pressing mechanism can be adjusted.

[0018] On the other hand, the present invention adopts the following technical solutions:

[0019] A method for assembling a stationary blade ring is based on the above-mentioned stationary blade ring blade assembly device, comprising:

[0020] Step 1: hoist the stationary blade ring to be assembled onto the working platform, with blades pre-assembled at the set position of the stationary blade ring;

[0021] Step 2: drive the radial locking mechanism of the stationary blade ring to position the stationary blade ring at the center of the working platform, and then drive the axial locking mechanism of the stationary blade ring to axially lock the stationary blade ring on the working platform;

[0022] Step 3: driving the working platform to move toward the blade pressing mechanism to adjust the relative position of the stationary blade ring and the blade pressing mechanism;

[0023] Step 4: Adjust the relative position of the pressure head of the blade pressing mechanism and the blade so that the inclination angle of the pressure head is consistent with the pressing angle of the blade;

[0024] Step 5: Control the output pressure of the blade pressing mechanism to press the blades into place on the stationary blade ring.

[0025] Beneficial effects of the present invention:

[0026] The stator ring blade assembly device realizes the automatic installation of the blade on the stator ring and ensures the force and position accuracy during the assembly process, thereby improving the stability and reliability of the assembly of the blade and the stator ring. The stator ring blade assembly method based on this greatly improves the assembly efficiency, avoids damage to the blade and the stator ring, and improves the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of a stationary blade ring blade assembly device provided by an embodiment of the present invention;

[0028] Figure 2 It is a structural schematic diagram of a stationary blade ring radial locking mechanism, a stationary blade ring axial locking mechanism and a stationary blade ring axial supporting mechanism involved in an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of synchronous action of four stationary blade ring radial locking mechanisms involved in an embodiment of the present invention;

[0030] Figure 4 is a first perspective view of a blade pressing mechanism according to an embodiment of the present invention;

[0031] Figure 5 is a second viewing angle diagram of the blade pressing mechanism involved in the embodiment of the present invention;

[0032] Figure 6 It is a hydraulic principle diagram of a stationary blade ring blade assembly device provided in an embodiment of the present invention.

[0033] In the attached figure:

[0034] 1. Working platform;

[0035] 2. Stator ring radial locking mechanism; 21. Bearing platform; 22. Rotating screw; 23. First nut; 24. Support seat; 25. Limit rod; 26. Bevel gear;

[0036] 3. Axial locking mechanism of stationary blade ring; 31. Pressing cylinder; 32. Pressing block;

[0037] 4. Axial support mechanism for stationary blade ring; 41. Lifting cylinder; 42. Roller;

[0038] 5. Blade pressing mechanism; 51. Mounting plate; 52. Press head; 53. First pressing cylinder; 54. Second pressing cylinder; 55. Support frame; 56. Lifting seat; 57. Fixed screw rod; 58. Second nut; 59. Rotating motor;

[0039] 6. Brake components;

[0040] 7. Fuel tank;

[0041] 8. Hydraulic pump;

[0042] 9. Pressurizing valve;

[0043] 10. Translation drive assembly;

[0044] 11. The first hydraulic valve group;

[0045] 12. Second hydraulic valve group;

[0046] 13. The third hydraulic valve group;

[0047] 14. The fourth hydraulic valve group. DETAILED DESCRIPTION

[0048] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0049] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0051] In the description of this embodiment, terms such as "up", "down", "left", and "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, 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, and therefore should not be understood as a limitation on the present invention.

[0052] In addition, the terms "first", "second", etc. are merely used to distinguish in description and have no special meanings.

[0053] See also Figures 1 to 6 As shown, this embodiment provides a stationary blade ring and blade assembly device, including a working platform 1, a stationary blade ring radial locking mechanism 2, a stationary blade ring axial locking mechanism 3 and a blade pressing mechanism 5, wherein:

[0054] A plurality of stationary blade ring radial locking mechanisms 2 are evenly distributed around the central circumference of the working platform 1, and each stationary blade ring radial locking mechanism 2 can synchronously approach or move away from the center of the working platform 1 to radially lock the stationary blade ring to be assembled or release the assembled stationary blade ring;

[0055] The stationary blade ring axial locking mechanism 3 is arranged on each stationary blade ring radial locking mechanism 2, and the stationary blade ring radial locking mechanism 2 is used to axially lock the radially locked stationary blade ring on the working platform 1;

[0056] The blade pressing mechanism 5 is located at one side of the working platform 1, and is used to press the blades at the set positions on the stationary blade ring into place.

[0057] Therefore, the stationary blade ring blade assembly device realizes the automatic installation of the blade on the stationary blade ring, and can ensure the force and position accuracy during the assembly process, thereby improving the stability and reliability of the assembly of the blade and the stationary blade ring.

[0058] Optionally, see Figure 2 and Figure 3The stationary blade ring radial locking mechanism 2 includes a bearing platform 21, and the bottom of the bearing platform 21 is slidably matched with the surface of the working platform 1, which can be specifically in the form of a guide rail slider to ensure the displacement accuracy of the bearing platform 21.

[0059] A rotating screw 22 is disposed on the working platform 1 , and a first nut 23 threadably matched with the rotating screw 22 is disposed on the bearing platform 21 , so that the rotating motion of the rotating screw 22 is converted into the translational motion of the bearing platform 21 .

[0060] The stationary blade ring is placed on a bearing platform 21, and a support seat 24 is provided on the bearing platform 21 and located on the outer side of the stationary blade ring. A limit rod 25 in contact with the side surface of the stationary blade ring is provided on the support seat 24; further, the surface of the limit rod 25 is wrapped with nylon material, which is wear-resistant and not easy to damage the stationary blade ring; in addition, according to the requirement that the stationary blade ring can be rotated to adjust the position, the limit rod 25 and the stationary blade ring are in rolling contact, which does not affect the radial limitation of the stationary blade ring.

[0061] In this embodiment, four examples are provided with the radial locking mechanism 2 of the stationary blade ring. The four rotating screws 22 extend toward the center of the working platform 1 respectively, and a bevel gear 26 is provided at the end of each rotating screw 22. The four bevel gears 26 are meshed in sequence, so that the four supporting platforms 21 move synchronously. Only one rotating screw 22 needs to be driven to drive all the supporting platforms 21 to move, thereby reducing the driving structure and ensuring the synchronization of each supporting platform 21.

[0062] Optionally, see Figure 2 The stationary blade ring axial locking mechanism 3 includes a downward pressure cylinder 31, which is installed on the support seat 24 and is located above the stationary blade ring. The output rod of the downward pressure cylinder 31 faces downward, and a pressure block 32 in contact with the upper surface of the stationary blade ring is provided on the output rod of the downward pressure cylinder 31. The pressure block 32 is lifted and moved to achieve the function of axial locking and unlocking of the stationary blade ring. Similarly, the pressure block 32 is also made of nylon material that is not easy to damage the stationary blade ring.

[0063] Optionally, see Figure 2 The stator ring blade assembly device also includes a stator ring axial support mechanism 4, which includes a lifting cylinder 41. A concave cavity is provided on the surface of the bearing platform 21 supporting the stator ring. The lifting cylinder 41 is installed on the bearing platform 21. A roller 42 located in the concave cavity is provided on the output rod of the lifting cylinder 41. The lifting cylinder 41 is used to drive the roller 42 to be higher than the bearing platform 21 and lift the stator ring, and the roller 42 is in rolling contact with the lower surface of the stator ring. It is also used to drive the roller 42 to sink into the concave cavity and make the stator ring fall on the bearing platform 21. Similarly, the roller 42 is also made of nylon material that is not easy to damage the stator ring.

[0064] Thus, by lifting the stationary blade ring through the roller 42, the stationary blade ring can rotate freely on the roller 42, making it convenient to install blades at multiple positions on the stationary blade ring; after the stationary blade ring is lowered, it can be quickly clamped and fixed.

[0065] Optionally, see Figure 4 and Figure 5 The blade pressing mechanism 5 includes a mounting plate 51, on which are provided two oppositely arranged pressing heads 52 and a first pressing cylinder 53 and a second pressing cylinder 54; the first pressing cylinder 53 is used to drive one pressing head 52 to press the first side of the blade to be assembled and push the blade to a set position; the second pressing cylinder 54 is used to drive another pressing head 52 to move to the second side of the blade at the set position; the two pressing heads 52 cooperate to limit the two sides of the blade, and the inclination angle of the two pressing heads 52 is consistent with the pressing angle of the blade.

[0066] In this embodiment, the two pressing heads 52 use a method of one pressing and the other assisting in limiting to ensure accurate press-fitting of the blades, but it is not limited to this. The function of one pressing head 52 pressing the blades in and the other pressing head 52 pressing the blades out can also be achieved to meet more assembly requirements.

[0067] Furthermore, the blade pressing mechanism 5 also includes a support frame 55 and a lifting seat 56, and the lifting seat 56 is slidably matched with the support frame 55. Specifically, smooth parts are provided on the edges of both sides of the support frame 55, and a sliding block part that cooperates with the smooth part is provided on the support frame 55; a vertically arranged fixed screw rod 57 is provided on the lifting seat 56, and a second nut 58 that cooperates with the fixed screw rod 57 is provided on the support frame 55. Here, the rotation of the second nut 58 is converted into the lifting and lowering of the lifting seat 56 by the relative lifting of the fixed screw rod 57 and the relative rotation of the second nut 58.

[0068] A rotating motor 59 is provided on the lifting seat 56, and the mounting plate 51 is fixed on the output shaft of the rotating motor 59. The rotating motor 59 is used to drive the mounting plate 51 to rotate in a vertical plane perpendicular to the stationary blade ring, that is, the inclination angle of the pressure head 52 on the mounting plate 51 is adjusted by the rotating motor 59 to adapt to the pressing angle of the blade.

[0069] Thus, the inclination angle and height position of the pressure head 52 are precisely controlled to ensure that the pressure head 52 can have good contact with the blade root of the blade;

[0070] Furthermore, the lifting seat 56 is provided with an arc edge, the center of which is located at the output shaft of the rotary motor 59, and the mounting plate 51 is provided with a brake assembly 6 acting on the arc edge, the brake assembly 6 is used to limit the rotation of the mounting plate 51 to ensure the position accuracy of the mounting plate 51. The brake assembly 6 here preferably uses a brake cylinder to control the braking action.

[0071] Optionally, a slide rail is provided below the working platform 1, and the slide rail is arranged toward the blade pressing mechanism 5, and the working platform 1 can slide along the slide rail, so that the relative position of the stationary blade ring and the blade pressing mechanism 5 is adjustable. Here, the working platform 1 is preferably driven and moved by a hydraulic cylinder as a translation drive component 10.

[0072] In the whole device, the hydraulic system of the blade pressing mechanism 5, the brake assembly 6 and the translation drive assembly 10 of the working platform 1 is as follows: Figure 6 As shown, after the hydraulic oil in the oil tank 7 passes through the hydraulic pump 8 and the pressure boosting valve 9, it supplies energy to the first pressing cylinder 53 through the first hydraulic valve group 11, supplies energy to the second pressing cylinder 54 through the second hydraulic valve group 12, supplies energy to the brake cylinder of the brake assembly 6 through the third hydraulic valve group 13, and supplies energy to the hydraulic cylinder of the translation drive assembly 10 through the fourth hydraulic valve group 14, and accurately controls the pressing force on the blades to ensure that the entire working process is smooth and reliable. At the same time, the working stroke of each cylinder can be controlled by sensors to avoid human misoperation.

[0073] Based on the above-mentioned stationary blade ring blade assembly device, this embodiment also provides a stationary blade ring blade assembly method, including the following steps:

[0074] Step 1: hoist the stationary blade ring to be assembled onto the working platform 1, and blades are pre-assembled at the set position of the stationary blade ring.

[0075] Step 2: drive the radial locking mechanism 2 of the stationary blade ring to position the stationary blade ring at the center of the working platform 1; then drive the axial locking mechanism 3 of the stationary blade ring to axially lock the stationary blade ring on the working platform 1.

[0076] Specifically, by driving any rotating screw 22 on the working platform 1, the four supporting platforms 21 are driven to move synchronously toward the center of the working platform 1, and the four limit rods 25 are pressed against the side surface of the stationary blade ring, so that the radial position of the stationary blade ring is locked; after the radial position is fixed, the pressure block 32 is driven by four downward pressure cylinders 31 to press the stationary blade ring, so that the axial position of the stationary blade ring on the working platform 1 is locked.

[0077] Step 3: Drive the working platform 1 to move toward the blade pressing mechanism 5 to adjust the relative position of the stationary blade ring and the blade pressing mechanism 5.

[0078] Specifically, the translation drive assembly 10 drives the working platform 1 to move toward the blade pressing mechanism 5 , so that the stationary blade ring is located between the two pressing heads 52 .

[0079] Step 4: Adjust the relative position between the pressing head 52 of the blade pressing mechanism 5 and the blade so that the inclination angle of the pressing head 52 is consistent with the pressing angle of the blade.

[0080] Specifically, the height of the pressure head 52 is adjusted by the lifting seat 56 and the tilt angle of the pressure head 52 is controlled by the rotating motor 59, so that the pressure head 52 matches the pressing position and angle of the blade.

[0081] Step 5: Control the output pressure of the blade pressing mechanism 5 to press the blades into place on the stationary blade ring.

[0082] Specifically, the numerical control of the output pressure is mainly achieved by controlling the proportional pressure reducing valve in the first hydraulic valve group 11 through the PLC to control the output pressure of the first press-fitting cylinder 53 .

[0083] Furthermore, before step five, it is necessary to confirm whether the pressure head 52 can fully contact the blade root of the blade. If not, it is necessary to fine-tune the rotation angle of the stationary blade ring. At this time, loosen the stationary blade ring axial locking mechanism 3 and the stationary blade ring radial locking mechanism 2, and lift the stationary blade ring by driving the stationary blade ring axial support mechanism 4. Then, the stationary blade ring can be rotated to a suitable position, and then the stationary blade ring can be lowered, and step two can be repeated again.

[0084] In addition, after one blade is installed, the axial locking mechanism 3 and the radial locking mechanism 2 of the stationary blade ring are also loosened, the axial supporting mechanism 4 of the stationary blade ring is raised, the stationary blade ring is rotated to the installation position of the next blade, and the above steps are repeated to complete the assembly.

[0085] Therefore, the stator ring blade assembly method greatly improves the assembly efficiency, avoids damage to the blades and the stator ring, and improves the yield rate.

[0086] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The stationary blade ring blade assembly device is characterized by: It comprises a working platform (1), a stationary blade ring radial locking mechanism (2), a stationary blade ring axial locking mechanism (3) and a blade pressing mechanism (5), wherein: A plurality of the stationary blade ring radial locking mechanisms (2) are evenly distributed around the central circumference of the working platform (1), and each of the stationary blade ring radial locking mechanisms (2) can synchronously approach or move away from the center of the working platform (1) to radially lock the stationary blade ring to be assembled or release the assembled stationary blade ring; The stationary blade ring axial locking mechanism (3) is arranged on each of the stationary blade ring radial locking mechanisms (2), and the stationary blade ring radial locking mechanism (2) is used to axially lock the radially locked stationary blade ring on the working platform (1); The blade pressing mechanism (5) is located on one side of the working platform (1), and is used to press the blades at a set position on the stationary blade ring into place.

2. The stationary blade ring blade assembly device according to claim 1, characterized in that: The stator ring radial locking mechanism (2) comprises a bearing platform (21), the bottom of the bearing platform (21) is slidably matched with the surface of the working platform (1), and a rotating screw (22) is arranged on the working platform (1), and a first nut (23) threadedly matched with the rotating screw (22) is arranged on the bearing platform (21), and the stator ring is placed on the bearing platform (21), and a support seat (24) is arranged on the bearing platform (21) and located on the outer side of the stator ring, and a limit rod (25) in contact with the side surface of the stator ring is arranged on the support seat (24).

3. The stationary blade ring blade assembly device according to claim 2, characterized in that: Four stationary blade ring radial locking mechanisms (2) are provided, and the four rotating screws (22) extend toward the center of the working platform (1) respectively, and a bevel gear (26) is provided at the end of each rotating screw (22). The four bevel gears (26) are meshed in sequence, so that the four supporting platforms (21) move synchronously.

4. The stationary blade ring blade assembly device according to claim 2, characterized in that: The stationary blade ring axial locking mechanism (3) comprises a downward pressure cylinder (31), which is mounted on the support seat (24) and is located above the stationary blade ring. The output rod of the downward pressure cylinder (31) faces downward, and a pressure block (32) in contact with the upper surface of the stationary blade ring is provided on the output rod of the downward pressure cylinder (31).

5. The stationary blade ring blade assembly device according to claim 2, characterized in that: It also includes a stationary blade ring axial support mechanism (4), the stationary blade ring axial support mechanism (4) includes a lifting cylinder (41), a concave cavity is provided on the surface of the bearing platform (21) supporting the stationary blade ring, the lifting cylinder (41) is installed on the bearing platform (21), and a roller (42) located in the concave cavity is provided on the output rod of the lifting cylinder (41); The lifting cylinder (41) is used to drive the roller (42) to be higher than the bearing platform (21) and to lift the stationary blade ring, and the roller (42) is in rolling contact with the lower surface of the stationary blade ring; The lifting cylinder (41) is also used to drive the roller (42) to sink into the concave cavity and make the stationary blade ring fall onto the supporting platform (21).

6. The stationary blade ring blade assembly device according to claim 1, characterized in that: The blade pressing mechanism (5) comprises a mounting plate (51), on which two pressing heads (52) arranged opposite to each other and a first pressing cylinder (53) and a second pressing cylinder (54) are arranged; The first press-fitting oil cylinder (53) is used to drive one of the press heads (52) to press the first side of the blade to be assembled and push the blade to the set position; The second pressing cylinder (54) is used to drive the other pressing head (52) to move to the second side of the blade at the set position; The two pressing heads (52) cooperate to limit the positions of the two sides of the blade, and the inclination angles of the two pressing heads (52) are consistent with the pressing angles of the blade.

7. The stationary blade ring blade assembly device according to claim 6, characterized in that: The blade pressing mechanism (5) further comprises a support frame (55) and a lifting seat (56), wherein the lifting seat (56) is slidably matched with the support frame (55), a vertically arranged fixed screw rod (57) is arranged on the lifting seat (56), a second nut (58) matched with the fixed screw rod (57) is arranged on the support frame (55), a rotating motor (59) is arranged on the lifting seat (56), the mounting plate (51) is fixed on the output shaft of the rotating motor (59), and the rotating motor (59) is used to drive the mounting plate (51) to rotate in a vertical plane perpendicular to the stationary blade ring.

8. The stationary blade ring blade assembly device according to claim 7, characterized in that: The lifting seat (56) is provided with an arc-shaped edge, the center of which is located at the output shaft of the rotating motor (59). The mounting plate (51) is provided with a brake assembly (6) acting on the arc-shaped edge, and the brake assembly (6) is used to limit the rotation of the mounting plate (51).

9. The stationary blade ring blade assembly device according to claim 1, characterized in that: A slide rail is provided below the working platform (1), and the slide rail is arranged toward the blade pressing mechanism (5). The working platform (1) can slide along the slide rail, so that the relative position of the stationary blade ring and the blade pressing mechanism (5) is adjustable.

10. A method for assembling stationary blade rings, based on the stationary blade ring assembly device according to any one of claims 1 to 9, characterized in that: include: Step 1: hoisting the stationary blade ring to be assembled onto the working platform (1), wherein the stationary blade ring has blades pre-assembled at the set position; Step 2: driving the stationary blade ring radial locking mechanism (2) to position the stationary blade ring at the center of the working platform (1), and then driving the stationary blade ring axial locking mechanism (3) to axially lock the stationary blade ring on the working platform (1); Step 3: driving the working platform (1) to move toward the blade pressing mechanism (5) to adjust the relative position between the stationary blade ring and the blade pressing mechanism (5); Step 4: adjusting the relative position of the pressing head (52) of the blade pressing mechanism (5) and the blade so that the inclination angle of the pressing head (52) is consistent with the pressing angle of the blade; Step 5: Control the output pressure of the blade pressing mechanism (5) to press the blade into place on the stationary blade ring.

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