Auxiliary tool for maintaining guide vane shaft of gas turbine

Abstract

The utility model belongs to the technical field of gas turbines, and discloses an auxiliary tool for maintaining a guide vane shaft of a gas turbine, the auxiliary tool for maintaining the guide vane shaft of the gas turbine comprises a clamping sleeve, two side lugs, a connecting piece and an ejector rod, the two clamping pieces are oppositely buckled to form a fixing hole, the two side lugs are respectively arranged on the two sides of the clamping pieces, and the ejector rod is arranged on the connecting piece. The connecting piece sequentially penetrates through the mounting holes of the corresponding side lugs of the two clamping pieces so that the fixing hole can lock the guide vane shaft, the ejector rod is rotationally arranged in the jackscrew hole and can move in the axis direction of the jackscrew hole, the ejector rod can rotate around the axis of the jackscrew hole and the axis of the fixing hole, and the guide vane shaft can axially move and rotate relative to the clamping sleeve. And the clamping stagnation fault of the guide vane shaft can be quickly maintained, the normal working state of the guide vane shaft can be recovered in time, and the problems of surface damage and deformation caused by direct contact between a traditional wrench, a pipe wrench and other tools and the guide vane shaft are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas turbine technical field especially relates to gas turbine guide vane shaft maintenance auxiliary tool. BACKGROUND

[0002] The sorla gas turbine pressurizes air by 13 guide vanes, wherein the first 7 stages are fixed guide vanes and the last 6 stages are rotatable guide vanes. The main function of the compressor inlet guide vanes is to control the compressor inlet flow and pressure to meet different process requirements. By adjusting the angle of the guide vanes, precise inlet flow control can be achieved, thereby achieving stable process parameters and efficient compression effect.

[0003] The servo motor drives the guide vane shaft, pushes the blade assembly through the connecting rod, and the blade assembly rotates along the tangent direction with the guide vane shaft as the center. When the blade assembly rotates, all the guide vane shafts rotate at the same angular velocity in the same direction, maintaining the stable and precise control of the flow. During the rotation of the blade assembly, water washing, air condensate water, etc. may condense in the gap of the component, which may cause guide vane shaft corrosion and blockage, causing guide vane shaft connecting rod deformation, blade over-torque alarm, and unit shutdown. Moreover, the guide vane shaft and the body hole are gap-fitted, the gap at this position is narrow and not easy to clean, and there is a small amount of rust. When using conventional tools such as wrenches directly, the guide vane shaft shows no signs of loosening. Removing the guide vane shaft, connecting rod, and blade assembly, and using tools such as pipe pliers blindly at this time may cause problems such as component deformation and surface damage, causing serious unit failure and not meeting the hot standby management requirements of the gas turbine.

[0004] Therefore, there is an urgent need for a gas turbine guide vane shaft maintenance auxiliary tool to solve the above problems. INVENTION CONTENTS

[0005] The utility model aims at providing a gas turbine guide vane shaft maintenance auxiliary tool, which can quickly repair the jamming fault of the guide vane shaft, restore the normal working state of the guide vane shaft in time, eliminate the over-torque alarm, and avoid the problems of surface damage and deformation caused by the direct contact between traditional wrenches, pipe pliers, and other tools and the guide vane shaft.

[0006] In order to solve the above problems in the prior art, the utility model adopts the following technical scheme:

[0007] The gas turbine guide vane shaft maintenance auxiliary tool comprises:

[0008] The clamping sleeve comprises two clamping pieces, the two clamping pieces are oppositely clamped to form a fixed hole, and the clamping piece is provided with a jackscrew hole.

[0009] Two side ears are arranged on the two sides of the clamping piece, and the side ear is provided with a mounting hole.

[0010] A connecting piece is arranged in the mounting hole of the side lug and the fixing hole of the fixing lug, so that the guide vane shaft can be locked.

[0011] A top rod is arranged in the top screw hole and can move along the axis of the top screw hole, and the top rod can rotate around the axis of the top screw hole and the axis of the fixing hole, so that the guide vane shaft can move axially and rotate relative to the sleeve shaft.

[0012] Preferably, the outer surface of the top rod has external threads, and the inner hole wall of the top screw hole has internal threads, and the top rod and the top screw hole are threadedly connected.

[0013] Preferably, the clamping piece has a cutting surface, and the cutting surfaces of the two clamping pieces are arranged at intervals when the fixing hole fixes the guide vane shaft.

[0014] Preferably, the number of top rods is two, and the two top rods are arranged in the top screw hole corresponding to the two clamping pieces.

[0015] Preferably, the side lug and the clamping piece are integrally formed.

[0016] Preferably, the included angle between the side lug and the clamping piece is A, and the included angle A is 90 degrees.

[0017] Preferably, the sleeve and the two side lugs form a cross-shaped structure.

[0018] Preferably, the central axis of the top screw hole and the central axis of the fixing hole are arranged in parallel.

[0019] Preferably, the central axis of the top screw hole and the central axis of the mounting hole are arranged perpendicularly.

[0020] Preferably, the diameter of the fixing hole is less than or equal to the outer diameter of the guide vane shaft.

[0021] The beneficial effects of the utility model are as follows:

[0022] The utility model provides a gas turbine guide vane shaft maintenance auxiliary frock, the clamping sleeve includes two clamping pieces, two clamping pieces are fixedly connected to form the fixed hole, and the clamping piece is provided with the jackscrew hole, and two side ears are arranged on the two sides of the clamping piece, and the side ear is provided with the mounting hole. The connecting piece is sequentially arranged in the mounting hole of the corresponding side ear of two clamping pieces, so that the fixed hole can lock the guide vane shaft, the jack rod is rotatably arranged in the jackscrew hole and can move along the axis direction of the jackscrew hole, so that the clamping sleeve can move along the axis direction of the jack rod, simultaneously, the clamping sleeve drives the guide vane shaft to move synchronously in the axial direction, so that the guide vane shaft restores the original axial displacement, and it is convenient to clean and lubricate the clamping position of the guide vane shaft. The torque is directly acted on the jack rod, and the jack rod is pushed and pulled, so that the jack rod drives the clamping sleeve to make circular motion, and the guide vane shaft rotates, can restore the displacement in the circumferential direction, and it is convenient to clean and lubricate the clamping position of the guide vane shaft. Through the auxiliary quick maintenance of the frock of the clamping failure of the guide vane shaft, the normal working condition of the guide vane shaft is recovered in time, the over-torque alarm is eliminated, and the problem that the surface is damaged and deformed due to the direct contact of traditional wrench, pipe wrench and guide vane shaft is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structure schematic view of the gas turbine guide vane shaft maintenance auxiliary frock provided by the utility model embodiment is provided.

[0024] Figure 2 The first sectional view of the gas turbine guide vane shaft maintenance auxiliary frock provided by the utility model embodiment is provided.

[0025] Figure 3 The side view of the gas turbine guide vane shaft maintenance auxiliary frock provided by the utility model embodiment is provided.

[0026] Figure 4 The second sectional view of the gas turbine guide vane shaft maintenance auxiliary frock provided by the utility model embodiment is provided.

[0027] Reference signs:

[0028] 1, clamping piece; 11, fixed hole; 12, jackscrew hole; 13, cutting surface;

[0029] 2, side ear; 21, mounting hole;

[0030] 3, connecting piece;

[0031] 4, jack rod. DETAILED DESCRIPTION

[0032] The utility model will be further explained in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model, and not limit the utility model. In addition, it needs to be explained that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0033] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or become an integral whole, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through the intermediate medium, can be the communication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional feature between them. Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature. The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0035] In the description of the embodiment, the terms "on", "under", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawing, just for the convenience of description and simplification of operation, and not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are just used to distinguish in the description, and have no special meaning.

[0036] As Figures 1-4 As shown in the utility model, the gas turbine guide vane shaft maintenance auxiliary tool includes a sleeve, two side ears 2, a connecting piece 3 and a top rod 4. The sleeve includes two clamping pieces 1, the two clamping pieces 1 are buckled to form a fixing hole 11, the clamping piece 1 is provided with a jackscrew hole 12, the two side ears 2 are respectively arranged on the two sides of the clamping piece 1, and the side ear 2 is provided with a mounting hole 21. The connecting piece 3 is sequentially arranged in the mounting hole 21 of the corresponding side ear 2 of the two clamping pieces 1, so that the fixing hole 11 can lock the guide vane shaft, the top rod 4 is rotationally arranged in the jackscrew hole 12 and can move along the axis direction of the jackscrew hole 12, and the top rod 4 can rotate around the axis of the jackscrew hole 12 and the axis of the fixing hole 11, so that the guide vane shaft can move axially and rotate relative to the sleeve respectively.

[0037] The measuring rotating radius of the tool is 65mm, the maximum effective space of actual measuring operation is 130mm, the overall size is 122mm in length, 80mm in width and 20mm in thickness. Specifically, a semicircular groove is formed on one side end face of the clamping piece 1, the two clamping pieces 1 are buckled, so that the semicircular grooves corresponding to the two clamping pieces 1 are surrounded to form a fixing hole 11 for fixing the guide vane shaft. The clamping piece 1 and the side ears 2 arranged on both sides are in T-shaped structure, and the thickness is 20mm, which are all made of 45 carbon steel material. The connecting piece 3 is arranged as a fastening bolt, the mounting holes 21 of the two side ears 2 arranged on the same side of the two clamping pieces 1 are one-to-one corresponding, the connecting piece 3 passes through the mounting hole 21 of one of the side ears 2 and is fixedly connected with the mounting hole 21 of the other side ear 2, and the two side ears 2 are locked with each other to relatively fix the sleeve with the exposed driving end of the guide vane shaft. At this time, the tool and the guide vane shaft become a whole. The jacking rod 4 is rotationally connected to the jackscrew hole 12 and can move along the axis direction of the jackscrew hole 12, so that the sleeve can move along the axis direction of the jacking rod 4, and at the same time, the sleeve drives the guide vane shaft to move synchronously in the axial direction, so that the guide vane shaft restores the original axial displacement amount, and by means of the flow guide pipe, cleaning tool and cleaning lubricating spray and other materials, the cleaning and maintenance of the jammed part of the guide vane shaft are carried out. Using tools such as wrench and long rod, the torque is directly applied to the jacking rod 4, that is, the force is perpendicular to the central axis of the jacking rod 4, the jacking rod 4 is pushed and pulled, so that the jacking rod 4 drives the sleeve to make circular motion, the guide vane shaft rotates from the closed position (nominal-47 degrees) to the open position (nominal+5 degrees), and the guide vane shaft rotates, that is, 52 degrees, so that the guide vane shaft can restore the displacement amount in the circumferential direction, and the jammed part of the guide vane shaft is conveniently cleaned and lubricated. By means of the tool, the jammed failure of the guide vane shaft is quickly repaired, the normal working state of the guide vane shaft is restored in time, the over-torque alarm is eliminated, and the hot standby state of the compressor unit is restored, which provides reliable protection for safe operation of the unit. The problem of surface damage and deformation caused by direct contact of traditional wrench, pipe wrench and other tools with the guide vane shaft is avoided, and the overall size of the tool is small, which can be used in the narrow space between adjacent guide vanes, meets the operation requirements, and is simple and convenient to operate.

[0038] Further, with reference to Figures 1-4The outer circumferential surface of the ejector rod 4 is provided with external threads, and the inner hole wall of the ejector hole 12 is provided with internal threads, and the ejector rod 4 and the ejector hole 12 are screwed together. The number of ejector rods 4 is two, and the two ejector rods 4 are respectively arranged in the corresponding ejector hole 12 of the two clamping pieces 1, and the two ejector rods 4 are screwed, so that the sleeve can move along the axis direction of the ejector rod 4, and at the same time, the sleeve can axially pull the guide vane shaft, and the two ejector rods 4 are screwed in the opposite direction, the nylon rod is perpendicular to the tool plane and applies an axial force, so that the guide vane shaft moves in the opposite axial direction, and at the same time, the guide vane shaft is cleaned and lubricated at the clamping position. Through the measurement and data comparison analysis of the change of the axial displacement, the original axial displacement of the guide vane shaft is restored, and the displacement repair of the guide vane shaft in the axial direction is successful.

[0039] Further, with reference to Figures 1-4 The clamping piece 1 is provided with a cutting surface 13, and when the fixed hole 11 fixes the guide vane shaft, the cutting surfaces 13 of the two clamping pieces 1 are arranged at intervals. After the tool is integrally formed, the joint surfaces of the two clamping pieces 1 are cut respectively before the guide vane shaft is fixed, and the cutting thickness is 1.5mm, which appropriately reduces the hole diameter of the fixed hole 11. The hole diameter of the fixed hole 11 is less than or equal to the outer diameter of the guide vane shaft, and the fastening space of the sleeve is reserved, the locking torque of the guide vane shaft and the sleeve is increased, and the fixed hole 11 is tightly installed with the guide vane shaft.

[0040] Further, with reference to Figures 1-4 The side lug 2 and the clamping piece 1 are integrally formed. The side lug 2 and the clamping piece 1 are integrally formed by casting or other methods, and have high structural strength and are not easy to break. The included angle between the side lug 2 and the clamping piece 1 is A, and the included angle A is 90 degrees. The side lug 2 and the clamping piece 1 are arranged perpendicularly, the sleeve and the two side lugs 2 form a cross-shaped structure, which can not only be used in the narrow space between adjacent guide vane shafts, but also can be operated on the gas turbine with a curved outer surface, meeting the operation requirements and improving the maintenance efficiency of the operator.

[0041] Further, with reference to Figures 1-4The middle axis of the top screw hole 12 and the middle axis of the fixing hole 11 are arranged in parallel, and the middle axis of the top screw hole 12 and the middle axis of the mounting hole 21 are arranged in perpendicular. After the guide vane shaft completes the axial displacement, a force moment is directly applied to the top rod 4 by using a wrench, a long rod or other tools, that is, the force is perpendicular to the middle axis of the top screw hole 12, the top rod 4 is pushed and pulled, the top rod 4 drives the sleeve to make a circular motion, meanwhile, the sleeve drives the guide vane shaft to rotate, the direction of the force moment is changed, the guide vane shaft is reversely rotated, meanwhile, the stuck part of the guide vane shaft is cleaned and lubricated, and it is determined that the displacement repair in the circumferential direction of the guide vane shaft is successful. The mounting holes 21 of the two side ears 2 arranged on the same side of the two clamping pieces 1 are one-to-one corresponding, the connecting piece 3 passes through the mounting hole 21 of one side ear 2 and is fixedly connected with the mounting hole 21 of the other side ear 2, so that the sleeve can be transversely fixed in the longitudinal guide vane shaft in the mounting hole 21, and the tool and the guide vane shaft become an integral whole.

[0042] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments need not to be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A gas turbine vane shaft repair aid characterized by, The utility model relates to a fixing sleeve for guide vane shaft, comprising: A sleeve includes two clamping pieces (1), two clamping pieces (1) are buckled to form a fixing hole (11), and the clamping piece (1) is provided with a top hole (12); Two side ears (2) are arranged on both sides of the clamping piece (1) respectively, and the side ear (2) is provided with a mounting hole (21); A connecting piece (3) is sequentially arranged in the mounting hole (21) of the side ear (2) corresponding to the clamping piece (1), so that the fixing hole (11) can lock the guide vane shaft; A top rod (4) is rotatably arranged in the top hole (12) and can move along the axis direction of the top hole (12), and the top rod (4) can rotate around the axis of the top hole (12) and the axis of the fixing hole (11), so that the guide vane shaft can move axially and rotate relative to the sleeve respectively.

2. The gas turbine vane shaft maintenance aid of claim 1, wherein, The outer periphery of the top rod (4) has external threads, and the inner hole wall of the top hole (12) has internal threads, and the top rod (4) and the top hole (12) are screwed.

3. The gas turbine vane shaft maintenance aid of claim 1, wherein, The clamping piece (1) has a cutting surface (13), and when the fixing hole (11) fixes the guide vane shaft, the cutting surfaces (13) of the two clamping pieces (1) are arranged at intervals.

4. The gas turbine vane shaft maintenance aid of claim 1, wherein, The number of the top rod (4) is two, and the two top rods (4) are rotatably arranged in the top hole (12) corresponding to the clamping piece (1) respectively.

5. The gas turbine vane shaft maintenance aid of claim 1, wherein, The side ear (2) and the clamping piece (1) are integrally formed.

6. The gas turbine vane shaft maintenance aid of claim 1, wherein, The included angle between the side ear (2) and the clamping piece (1) is A, and the included angle A is 90 degrees.

7. The gas turbine vane shaft maintenance assist tool of claim 1, wherein, The sleeve and the two side ears (2) form a cross structure.

8. The gas turbine vane shaft maintenance aid of claim 1, wherein, The central axis of the top hole (12) and the central axis of the fixing hole (11) are arranged in parallel.

9. The gas turbine vane shaft maintenance assist tool of claim 1, wherein, The central axis of the top hole (12) and the central axis of the mounting hole (21) are arranged perpendicularly.

10. The gas turbine vane shaft maintenance aid of claim 1, wherein, The hole diameter of the fixing hole (11) is less than or equal to the outer diameter of the guide vane shaft.

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