A special tool for assisting dismounting of inlet guide vanes

Abstract

The utility model discloses a special tool for assisting the dismounting of inlet guide vane, relates to inlet guide vane dismounting technical field, and special tool includes apron, sleeve and screw, sleeve's axial one end is fixedly connected with apron, and screw is fixedly connected with apron, and screw is arranged in sleeve, and the end away from apron in sleeve stretches out, wherein, when the screw is connected in the axial screw hole of the blade root of inlet guide vane through the elastic pin connection of inlet guide vane and rotary arm, sleeve can be compacted in rotary arm. The present application improves the misplacement phenomenon of blade root and rotary arm hole caused by spring when elastic pin is chiseled out, guarantees the integrity of the pin hole of blade root and rotary arm, and improves the phenomenon that blade root and rotary arm hole are easily damaged by long time tentative installation of elastic pin.

Description

Technical Field

[0001] This utility model relates to the field of inlet guide vane disassembly and assembly technology, and in particular to a special tool for assisting inlet guide vane disassembly and assembly. Background Technology

[0002] Blast furnace gas turbines are designed with inlet guide vanes (IGVs, short for air compressor inlet guide vanes) to improve acceleration performance during startup. The turbines undergo maintenance every two years, which involves the disassembly and reassembly of the variable inlet guide vanes, especially the removal and reassembly of the elastic pins connecting the blade root to the rotor arm.

[0003] Currently, when disassembling the IGV, an M10 drill bit and a copper rod are used to chisel out the spring pin. This operation is prone to damaging spare parts. Because the spring is constantly pressing against the rotating arm, the chiseling process can easily enlarge the hole for the blade root pin. When the spring pin is chiseled out, the instantaneous force of the spring pressing against the rotating arm can cause misalignment between the blade root and the rotating arm hole, damaging both the blade root and the rotating arm hole.

[0004] Currently, during IGV reinstallation, aligning the boom hole and blade root hole is difficult. The spring pin is not easily driven in, easily damaging the spring pin and blade root. Prolonged trial-and-error installation of the spring pin can damage the blade root and boom hole, resulting in scratches on these surfaces and causing jamming during IGV operation. Utility Model Content

[0005] To address the aforementioned issues, this application provides a specialized tool for assisting in the assembly and disassembly of inlet guide vanes.

[0006] This application provides a special tool for assisting in the disassembly and assembly of an inlet guide vane. The special tool includes a cover plate, a sleeve, and a screw. One axial end of the sleeve is fixedly connected to the cover plate, and the screw is fixedly connected to the cover plate. The screw passes through the sleeve and extends out from the end of the sleeve away from the cover plate. When the inlet guide vane and the rotating arm are connected by an elastic pin, and the screw is connected to the axial screw hole at the root of the inlet guide vane, the sleeve can be pressed against the rotating arm.

[0007] In some implementations, the screws are threaded onto the cover plate.

[0008] In some implementations, the head of the screw is located on the side of the cover plate away from the sleeve.

[0009] In some implementations, the sleeve is attached to the thickness side of the cover plate.

[0010] In some implementations, the sleeve is welded to the cover plate.

[0011] In some implementations, the sleeve and cover plate are integrally formed.

[0012] In some implementations, the tip of the screw is flat.

[0013] In some implementations, the inner diameter of the sleeve is larger than the outer diameter of the blade root.

[0014] In some implementations, the screws are welded to the cover plate.

[0015] In some embodiments, the cover plate is square in shape and the sleeve is cylindrical in shape.

[0016] The beneficial effects of this application are as follows: It provides a special tool for assisting in the disassembly and assembly of the inlet guide vane. The special tool includes a cover plate, a sleeve, and a screw. The sleeve is connected to the cover plate, and the screw is also connected to the cover plate. The screw passes through the sleeve and extends from the end of the sleeve away from the cover plate. When disassembling the inlet guide vane, if the inlet guide vane and the rotating arm are connected by a spring pin and it is necessary to release the connection of the spring pin, the special tool of this application is placed on the rotating arm. The screw is aligned with the axial threaded hole at the root of the inlet guide vane. The special tool of this application is rotated so that the screw is screwed into the axial threaded hole. At this time, the connection between the screw and the root of the vane is established. The screw is continued to be screwed into the axial threaded hole so that the sleeve gradually approaches the rotating arm and finally presses against the rotating arm. There is a sufficiently large static friction between the sleeve and the rotating arm. At this time, a relatively fixed relationship is established between the sleeve and the rotating arm. Thus, when the spring pin is removed later, the relative position between the rotating arm and the inlet guide vane remains unchanged, which improves the situation where the spring lifts the rotating arm when the spring pin is chiseled out. The defect of enlarged blade root pin hole caused by this invention improves the misalignment between the blade root and the rotating arm hole caused by the spring when the elastic pin is chiseled out, ensuring the integrity of the pin hole between the blade root and the rotating arm. On the other hand, during the reinstallation of the inlet guide vane, before reinstalling the elastic pin, the special tool of this application can be used to establish a constant positional relationship between the blade root and the rotating arm of the inlet guide vane. This constant positional relationship means that the blade root and the rotating arm are relatively stationary under the influence of no external force. Then, by rotating the blade, the pin hole of the rotating arm is aligned with the pin hole of the blade root. The elastic pin is then installed, and the special tool of this application is removed after the elastic pin is installed. The special tool of this application simplifies the operation difficulty when aligning the pin hole between the rotating arm and the blade root, and also keeps the pin hole of the rotating arm and the pin hole of the blade root in a state of long-term alignment. This improves the phenomenon that the blade root and the rotating arm hole are easily damaged by long-term trial installation of the elastic pin, improves the defect of scratches on the blade root and the rotating arm hole, and ensures smooth operation of the inlet guide vane. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model.

[0018] Figure 1Exploded view of the structures involved in the disassembly and reassembly of the inlet guide vane; Figure 2 A schematic diagram of the structure of a special tool for assisting in the disassembly and assembly of inlet guide vanes provided in this application; Figure 3 for Figure 1 A schematic diagram showing the connection between the middle leaf root and the rotating arm via a flexible pin.

[0019] Figure labels: 1-cotter pin, 2-nut, 3-swivel arm, 4-spring, 5-washer, 6-first bushing, 7-second bushing, 8-O-ring, 9-inlet guide vane, 91-blade, 92-blade shank, 93-blade root, 93a-axial threaded hole, 10-elastic pin, 11-cover plate, 12-sleeve, 13-screw. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity purposes and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0022] Please refer to Figure 1 This section combines Figure 1 This section explains the basic procedures for disassembling the inlet guide vane 9 of the air compressor during the overhaul of a gas turbine unit. First, the elastic pin 10 securing the inlet guide vane 9 needs to be removed. After removing the elastic pin 10, gently tap the blade shank 92 of the inlet guide vane 9 from the outside with a copper rod, while simultaneously holding the blade 91 of the inlet guide vane 9. Remove the spring 4, washer 5, bushing, and other accessories. When reassembling, pay attention to the flow direction of the blade 91. Reinstall the blade 91, spring 4, washer 5, bushing, and other accessories, and finally insert the elastic pin 10. Figure 1 The components in the middle, from top to bottom, are cotter pin 1, nut 2, rotating arm 3, spring 4, washer 5, first bushing 6, second bushing 7, O-ring 8 and inlet guide vane 9. Cotter pin 1 and nut 2 are used to fix rotating arm 3 in place. Spring 4, washer 5, first bushing 6, second bushing 7 and O-ring 8 are inserted through inlet guide vane 9 in sequence. One end of spring 4 abuts against the lower surface of rotating arm 3.

[0023] Please refer to Figure 2This application provides a special tool for assisting in the assembly and disassembly of an inlet guide vane 9. The special tool includes a cover plate 11, a sleeve 12, and a screw 13, both of which are connected to the cover plate 11. Specifically, one axial end of the sleeve 12 is fixedly connected to the cover plate 11, and the screw 13 is fixedly connected to the cover plate 11. The screw 13 passes through the sleeve 12 and extends from the end of the sleeve 12 away from the cover plate 11. The length of the screw 13 extending from the sleeve 12 is related to the intended use of this special tool. Here, a functional limitation is adopted to limit the length of the screw 13 extending from the sleeve 12. Specifically, with the inlet guide vane 9 and the rotating arm 3 connected by a spring pin 10, the screw 13 is connected to the axial screw hole 93a of the vane root 93 of the inlet guide vane 9, and the sleeve 12 can be pressed tightly against the rotating arm 3. Please refer to... Figures 1 to 3 This functional limitation also implies that screw 13 cannot come into contact with elastic pin 10.

[0024] When disassembling the inlet guide vane 9, the inlet guide vane 9 is connected to the rotating arm 3 by an elastic pin 10. When it is necessary to disconnect the connection of the elastic pin 10, first place the special tool of this application on the rotating arm 3, align the screw 13 with the axial screw hole 93a of the blade root 93 of the inlet guide vane 9, rotate the special tool of this application to screw the screw 13 into the axial screw hole 93a, at this time the connection between the screw 13 and the blade root 93 is established. Continue to screw the screw 13 into the axial screw hole 93a, so that the sleeve 12 gradually approaches the rotating arm 3 and finally presses against the rotating arm 3, so that there is a sufficiently large static friction between the sleeve 12 and the rotating arm 3, at this time a relatively fixed positional relationship between the sleeve 12 and the rotating arm 3 is established. Therefore, when the elastic pin 10 is subsequently removed, the relative position of the rotating arm 3 and the inlet guide vane 9 can remain unchanged. This improves the defect that the pin hole of the blade root 93 becomes larger due to the spring 4 lifting the rotating arm 3 when the elastic pin 10 is chiseled out. This also improves the phenomenon that the blade root 93 and the hole of the rotating arm 3 are misaligned due to the spring 4 when the elastic pin 10 is chiseled out, thus ensuring the integrity of the pin hole of the blade root 93 and the rotating arm 3.

[0025] After removing the elastic pin 10, remove the special tool and then slowly tap the blade root 93 with a copper rod. While tapping, the operator should hold the top of the blade 91 to prevent the inlet guide vane 9 from falling and causing damage. The removed inlet guide vane 9 should generally be numbered and marked. After the inlet guide vane 9 is removed, rotate the rotating arm 3 to the other side and then remove the spring 4, washer 5, first bushing 6, second bushing 7, and O-ring 8.

[0026] During the reinstallation of the inlet guide vane 9, the spring 4, washer 5, first bushing 6, second bushing 7, O-ring 8, and inlet guide vane 9 are arranged according to... Figure 1Install them in the following order: apply grease to the first bushing 6, the second bushing 7, and the O-ring 8. Install the inlet guide vane 9 according to the installation number, paying attention to the flow direction when installing the inlet guide vane 9. Subsequently, before reinstalling the elastic pin 10, use the special tool of this application to establish a constant positional relationship between the blade root 93 of the inlet guide vane 9 and the rotating arm 3. Here, constant positional relationship means that the blade root 93 and the rotating arm 3 can remain relatively stationary under the influence of no external force.

[0027] After establishing the relationship between the blade root 93 of the inlet guide vane 9 and the rotating arm 3, the blade 91 is rotated to align the pin hole of the rotating arm 3 with the pin hole of the blade root 93. Then, the elastic pin 10 is installed, an M10 drill bit is inserted, and the elastic pin 10 is driven in by the traction of the drill bit. Once the elastic pin 10 is in place, the special tool of this application is removed.

[0028] The special tool of this application not only simplifies the operation of aligning the pin holes of the rotating arm 3 and the blade root 93, but also ensures that the pin holes of the rotating arm 3 and the blade root 93 are aligned for a long time. This improves the phenomenon that the blade root 93 and the hole of the rotating arm 3 are easily damaged by long-term trial installation of the elastic pin 10, and improves the defect of scratches on the blade root 93 and the hole of the rotating arm 3, thus ensuring the smooth operation of the inlet guide vane 9.

[0029] In summary, the specialized tool of this application enables rapid disassembly and reassembly of the inlet guide vane 9, while ensuring that spare parts are not damaged during disassembly and reassembly. Furthermore, the specialized tool of this application also has the advantages of simple structure, readily available materials, low cost, high practicality, and high safety.

[0030] Regarding the connection between screw 13 and cover plate 11, a welding connection or a threaded connection can be used. Please refer to [reference needed]. Figure 2 The head of screw 13 is located on the side of cover plate 11 away from sleeve 12.

[0031] The cover plate 11 can be square in shape, and the sleeve 12 can be cylindrical in shape. Please refer to the reference. Figure 2 and Figure 3 In some embodiments, the inner diameter of the sleeve 12 is defined to be larger than the outer diameter of the blade root 93, so that when the special tool of this application is used, the sleeve 12 avoids the blade root 93, avoids squeezing the blade root 93, and protects the structure of the inlet guide vane 9.

[0032] When the cover plate 11 is a square plate, it has a thickness direction, and the sleeve 12 can be connected to the thickness side of the cover plate 11.

[0033] Regarding the connection between the sleeve 12 and the cover plate 11, a welding fixed connection method can be adopted, or the sleeve 12 and the cover plate 11 can be integrally formed, as long as the sleeve 12 and the cover plate 11 are relatively fixed and do not move.

[0034] In some embodiments, the top of the screw 13 is flat, and the top of the screw 13 refers to the end of the screw 13 away from the head. When the special tool of this application is used, the screw 13 will not contact the elastic pin 10.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0037] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A special tool for assisting in the assembly and disassembly of inlet guide vanes, characterized in that, The special tool includes: Cover plate; A sleeve, one axial end of which is fixedly connected to the cover plate; A screw is fixedly connected to the cover plate, the screw passes through the sleeve and extends from the end of the sleeve away from the cover plate; When the inlet guide vane and the rotating arm are connected by an elastic pin, and the screw is connected to the axial threaded hole at the root of the inlet guide vane, the sleeve can be pressed against the rotating arm.

2. The special tool as described in claim 1, characterized in that, The screw is threadedly connected to the cover plate.

3. The special tool as described in claim 2, characterized in that, The head of the screw is located on the side of the cover plate away from the sleeve.

4. The special tool as described in claim 1, characterized in that, The sleeve is connected to the thickness side of the cover plate.

5. The special tool as described in claim 4, characterized in that, The sleeve is welded to the cover plate.

6. The special tool as described in claim 4, characterized in that, The sleeve and the cover plate are integrally formed.

7. The special tool as described in claim 1, characterized in that, The top of the screw is flat.

8. The special tool as described in claim 1, characterized in that, The inner diameter of the sleeve is larger than the outer diameter of the leaf root.

9. The special tool as described in claim 1, characterized in that, The screw is welded to the cover plate.

10. The special tool as described in claim 1, characterized in that, The cover plate is square in shape, and the sleeve is cylindrical in shape.

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