Turbine partition plate inclined shroud ring cascade assembly tool

Abstract

The invention relates to a steam turbine partition plate inclined shroud ring cascade assembly tool which comprises a base, a plurality of blades and a plurality of blades. The driving mechanism is arranged on the base, the lashing strip clamping mechanisms are arranged on the base at intervals around the circumference, each lashing strip clamping mechanism comprises a mounting seat and a clamping arm, the mounting seats are connected to the driving mechanism, the clamping arms are rotatably mounted on the mounting seats through pin shafts, and the driving mechanism can drive the lashing strip clamping mechanisms to move in the radial direction. According to the size of the shroud, the driving mechanism is used for driving the shroud clamping mechanism to move and adjust the distance between the inner shroud and the outer shroud, the inclination angle of the shroud is controlled by rotating the clamping arm according to the inclination angle of the shroud, modular design is adopted for the tool, the tool can be suitable for assembly of cascade shrouds with different diameters and inclination angles, the tool manufacturing cost is reduced, and the production efficiency is improved. The assembly period is shortened, and the occupied space is reduced.

Description

Technical Field

[0001] This invention relates to the field of steam turbines, and more specifically to a steam turbine diaphragm oblique band blade assembly fixture. Background Technology

[0002] Turbine diaphragms serve to fix stationary blades (nozzles) and prevent interstage leakage. They divide the turbine interior into several pressure sections, allowing steam to convert potential energy into kinetic energy through the stationary blades and directing the steam flow into the moving blades in a predetermined direction. Existing turbine diaphragms mainly consist of an inner diaphragm ring, an outer diaphragm ring, and a blade assembly positioned between the inner and outer diaphragm rings. The inner and outer diaphragm rings support the blade assembly. This blade assembly includes an inner shroud, an outer shroud, and guide vanes. The guide vanes are installed between the inner and outer shrouds through perforations on the inner and outer shrouds and are fixed by welding.

[0003] Currently, the assembly of the inclined belt requires the manufacture of special round washers for each type of partition, which has the following drawbacks: 1. High unit production cost, as the number of webbing slots that can be machined on a lathe on a single round washer ring is limited.

[0004] 2. The reusability of the webbing is low; traditional round pad rings can basically only be used once, which is a waste of costs. 3. The tooling storage takes up a lot of space, and the large number of round pad rings also take up a lot of space.

[0005] 4. Although a universal tooling for straight belts was proposed, the problem of adjusting the angle of oblique belts was not solved. Summary of the Invention

[0006] Based on the above description, the present invention provides a turbine diaphragm oblique band blade assembly tooling to solve the problems of high single-piece production cost, large space occupation, and inability to adjust the angle of the oblique band in related technologies.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A turbine diaphragm inclined sheath blade assembly fixture, comprising: a base on which a drive mechanism is mounted; and a plurality of sheath clamping mechanisms arranged circumferentially on the base, each sheath clamping mechanism comprising a mounting base and a clamping arm, the mounting base being connected to the drive mechanism, the clamping arm being rotatably mounted on the mounting base via a pin, and the drive mechanism being able to drive the sheath clamping mechanism to move radially.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the driving mechanism includes: a gear with multiple strip holes on its plate surface, the multiple strip holes being spaced apart around the axis of the gear and inclined in the same direction; a driving block installed in the strip holes, the driving block being connected to the mounting base via a driving rod, the driving block being movable along the strip holes and driving the mounting base to move.

[0010] Furthermore, there are two gears, one located directly above the other. The belt clamping mechanism includes an inner belt clamping mechanism and an outer belt clamping mechanism. The upper gear is connected to the inner belt clamping mechanism, and the lower gear is connected to the outer belt clamping mechanism.

[0011] Furthermore, the outer perimeter clamping mechanism is located outside the inner perimeter clamping mechanism, and the drive rods of both the inner perimeter clamping mechanism and the outer perimeter clamping mechanism pass through the guide block, which is fixed to the base.

[0012] Furthermore, a drive gear meshes with the outer side of the gear, the diameter of which is smaller than that of the gear, and the drive gear is mounted on the output end of the motor.

[0013] Furthermore, a roller is installed at the lower end of the mounting base, and the roller can roll along the base.

[0014] Furthermore, an adjusting rod is installed on the mounting base, and the front end of the adjusting rod is movably connected to the lower end of the clamping arm. The adjustment rod can drive the clamping arm to rotate around the pin by moving back and forth.

[0015] Furthermore, the adjusting rod has an external thread on its outer side, and the adjusting rod is threadedly mounted on the mounting base.

[0016] Furthermore, the strip-shaped holes are arc-shaped, and multiple strip-shaped holes bend in the same direction.

[0017] Furthermore, the upper end of the clamping arm is provided with a slot, and the inner wall of the slot near the gear is arc-shaped.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: Based on the size of the sheath, the drive mechanism moves the sheath clamping mechanism to adjust the spacing between the inner and outer sheaths. Based on the tilt angle of the sheath, the tilt angle of the sheath is controlled by rotating the clamping arm. The tooling adopts a modular design, which can be adapted to the assembly of blade sheaths with different diameters and tilt angles, reducing tooling manufacturing costs, shortening the assembly cycle, and reducing space occupation. Attached Figure Description

[0019] Figure 1This is a perspective view of the turbine diaphragm oblique band blade assembly fixture provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the belt clamping mechanism provided in an embodiment of the present invention; Figure 3 This is a top view of the turbine diaphragm oblique band blade assembly fixture provided in an embodiment of the present invention.

[0020] The attached diagram lists the components represented by each number as follows: 1. Base; 2. Drive mechanism; 21. Gear; 22. Strip hole; 23. Drive block; 24. Drive rod; 25. Drive gear; 3. Surrounding belt clamping mechanism; 31. Mounting seat; 32. Clamping arm; 33. Pin; 34. Inner circumference belt clamping mechanism; 35. Outer circumference belt clamping mechanism; 36. Guide block; 37. Slot; 38. Roller; 39. Adjusting rod. Detailed Implementation

[0021] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0022] This invention provides a turbine diaphragm oblique band blade assembly fixture, which can solve the problems of high single-piece production cost, large space occupation, and inability to adjust the angle of the oblique band in related technologies.

[0023] See Figure 1 and Figure 2 As shown in the figure, a turbine diaphragm inclined sheath assembly fixture provided by an embodiment of the present invention includes: a base 1, on which a drive mechanism 2 is mounted; and multiple sheath clamping mechanisms 3, which are arranged circumferentially on the base 1. Each sheath clamping mechanism 3 includes a mounting base 31 and a clamping arm 32. The mounting base 31 is connected to the drive mechanism 2, and the clamping arm 32 is rotatably mounted on the mounting base 31 via a pin 33. The drive mechanism 2 can drive the sheath clamping mechanism 3 to move radially. In this embodiment, the spacing between the inner and outer sheaths is adjusted by driving the sheath clamping mechanism 3 to move according to the size of the sheath. The sheath tilt angle is controlled by rotating the clamping arm 32 according to the tilt angle of the sheath. The fixture adopts a modular design, which can be adapted to the assembly of blade sheaths with different diameters and tilt angles, reducing the manufacturing cost of the fixture, shortening the assembly cycle, and reducing space occupation.

[0024] See Figure 3As shown, in some embodiments, the driving mechanism 2 includes: a gear 21, the surface of which is provided with a plurality of strip holes 22, the plurality of strip holes 22 being spaced apart around the axis of the gear 21, and the plurality of strip holes 22 being inclined in the same direction; a driving block 23, which is installed in the strip holes 22, the driving block 23 being connected to the mounting base 31 through a driving rod 24, the driving block 23 being movable along the strip holes 22, and driving the mounting base 31 to move.

[0025] In this embodiment, when the gear 21 rotates, the drive block 23 can move radially along the gear 21 due to the inclined arrangement of the strip hole 22. The drive rod 24 drives the mounting base 31 to move radially, thereby adjusting the spacing between the inner and outer belts. When the gear 21 rotates, multiple belt clamping mechanisms 3 move simultaneously, that is, multiple belt clamping mechanisms 3 move radially outward by the same distance, ensuring that the multiple belt clamping mechanisms 3 always form a semi-circle, matching the shape of the belt. This eliminates the need for multiple adjustments and improves the adjustment efficiency.

[0026] See Figure 1 and Figure 2 As shown, in some embodiments, there are two gears 21, one located directly above the other. The belt clamping mechanism 3 includes an inner belt clamping mechanism 34 and an outer belt clamping mechanism 35. The upper gear 21 is connected to the inner belt clamping mechanism 34, and the lower gear 21 is connected to the outer belt clamping mechanism 35. In this embodiment, the inner belt clamping mechanism 34 is used to clamp the inner belt, and the outer belt clamping mechanism 35 is used to clamp the outer belt. A blade is installed between the inner and outer belts, and both are driven by the upper and lower gears respectively, so that they can be adjusted according to the distance between the inner and outer belts.

[0027] See Figure 3 As shown, in some embodiments, the outer belt clamping mechanism 35 is located outside the inner belt clamping mechanism 34. The drive rods 24 of both the inner belt clamping mechanism 34 and the outer belt clamping mechanism 35 pass through the guide block 36. The guide block 36 is fixed to the base 1, and the drive rod 24 can move within the guide block 36, which serves as a guide for the drive rod 24.

[0028] See Figure 3 As shown, in some embodiments, a drive gear 25 meshes with the outer side of the gear 21. The diameter of the drive gear 25 is smaller than that of the gear 21. The drive gear 25 is installed at the output end of the motor and is linked by the meshing of a small gear with a large gear. This can greatly reduce the torque of the gear and facilitate the rotation of the drive gear 21.

[0029] See Figure 2As shown, in some embodiments, a roller 38 is installed at the lower end of the mounting base 31. The roller 38 can roll along the base 1, which can reduce the friction of the mounting base 31 and facilitate the movement of the belt clamping mechanism 3 to adjust the spacing between the inner and outer belts.

[0030] See Figure 2 As shown, in some embodiments, an adjusting rod 39 is installed on the mounting base 31. The front end of the adjusting rod 39 is movably connected to the lower end of the clamping arm 32. The adjustment rod 39 can drive the clamping arm 32 to rotate around the pin 33 by moving back and forth. The clamping angle of the belt can be adjusted by rotating the clamping arm 32.

[0031] See Figure 2 As shown, in some embodiments, the adjusting rod 39 has an external thread on its outer side. The adjusting rod 39 is threaded onto the mounting base 31. Rotating the adjusting rod 39 allows it to move back and forth within the mounting base 31. The thread on the adjusting rod 39 can lock the clamping arm 32, keeping the clamping arm 32 at the adjusted angle.

[0032] See Figure 3 As shown, in some embodiments, the strip hole 22 is arc-shaped, and multiple strip holes 22 bend in the same direction to ensure that multiple belt clamping mechanisms 3 move radially outward when the gear 21 rotates, which is convenient for processing.

[0033] See Figure 2 As shown, in some embodiments, the upper end of the clamping arm 32 is provided with a slot 37. The inner wall of the slot 37 near the gear 21 is arc-shaped, which matches the shape of the inner side of the shroud, making the clamping more secure.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0035] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0036] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0037] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0038] 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, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tooling for assembling a turbine diaphragm with oblique surround and blades, characterized in that, It includes: The base (1) is equipped with a drive mechanism (2); Multiple strap clamping mechanisms (3) are arranged circumferentially on the base (1). Each strap clamping mechanism (3) includes a mounting base (31) and a clamping arm (32). The mounting base (31) is connected to the drive mechanism (2). The clamping arm (32) is rotatably mounted on the mounting base (31) via a pin (33). The drive mechanism (2) can drive the strap clamping mechanism (3) to move radially.

2. The turbine diaphragm inclined band blade assembly fixture according to claim 1, characterized in that, The drive mechanism (2) includes: The gear (21) has multiple strip holes (22) on its plate surface. The multiple strip holes (22) are spaced apart around the axis of the gear (21), and the multiple strip holes (22) are inclined in the same direction. The drive block (23) is installed in the strip hole (22). The drive block (23) is connected to the mounting base (31) through the drive rod (24). The drive block (23) can move along the strip hole (22) and drive the mounting base (31) to move.

3. The turbine diaphragm inclined frame with blade assembly fixture according to claim 2, characterized in that: There are two gears (21), one located directly above the other. The belt clamping mechanism (3) includes an inner belt clamping mechanism (34) and an outer belt clamping mechanism (35). The upper gear (21) is connected to the inner belt clamping mechanism (34), and the lower gear (21) is connected to the outer belt clamping mechanism (35).

4. The turbine diaphragm inclined frame with blade assembly fixture according to claim 3, characterized in that: The outer perimeter belt clamping mechanism (35) is located outside the inner perimeter belt clamping mechanism (34). The drive rods (24) of the inner perimeter belt clamping mechanism (34) and the outer perimeter belt clamping mechanism (35) are both mounted on the guide block (36), and the guide block (36) is fixed on the base (1).

5. The turbine diaphragm inclined frame with blade assembly fixture according to claim 2, characterized in that: A drive gear (25) meshes with the outer side of the gear (21). The diameter of the drive gear (25) is smaller than that of the gear (21). The drive gear (25) is installed at the output end of the motor.

6. The turbine diaphragm inclined frame with blade assembly fixture according to claim 2, characterized in that: The lower end of the mounting base (31) is equipped with a roller (38), which can roll along the base (1).

7. The turbine diaphragm inclined frame with blade assembly fixture according to claim 2, characterized in that: An adjusting rod (39) is installed on the mounting base (31). The front end of the adjusting rod (39) is movably connected to the lower end of the clamping arm (32). The adjustment rod (39) can drive the clamping arm (32) to rotate around the pin (33) by moving back and forth.

8. The turbine diaphragm inclined frame with blade assembly fixture according to claim 7, characterized in that: The adjusting rod (39) has an external thread on its outer side, and the adjusting rod (39) is threaded onto the mounting base (31).

9. The turbine diaphragm inclined frame with blade assembly fixture according to claim 2, characterized in that: The strip hole (22) is arc-shaped, and multiple strip holes (22) bend in the same direction.

10. The turbine diaphragm inclined frame with blade assembly fixture according to claim 2, characterized in that: The upper end of the clamping arm (32) is provided with a slot (37), and the inner wall of the slot (37) near the gear (21) is arc-shaped.

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