A kind of gas turbine variable stator blade assembly adjustment combination tool
By using a modular assembly and adjustment fixture for the gas turbine adjustable stator blades, the challenges of adjusting and centering the CV adjustable stator blade angle were solved, thereby improving production efficiency and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
- Filing Date
- 2025-05-09
- Publication Date
- 2026-06-09
AI Technical Summary
Existing tooling cannot simultaneously achieve angle adjustment, centering, and torque measurement of the CV adjustable stator, resulting in low production efficiency and high cost.
The gas turbine adjustable stator assembly and adjustment tooling adopts a split-combination structure, including an adapter block, a position adjustment template, and a bushing adjustment block. The adapter block is connected to the interface of a torque measuring wrench, and the angle adjustment and centering are achieved by combining the positioning hole and the connecting pin.
It improves production efficiency, reduces production costs, reduces reliance on multiple tooling, and enables efficient assembly and inspection of CV adjustable stator vanes.
Smart Images
Figure CN224334361U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas turbine technology, and in particular to a tooling for assembling and adjusting adjustable stationary blades of a gas turbine. Background Technology
[0002] During intake, heavy-duty gas turbines rely on adjustable inlet stator vanes on the compressor to regulate the intake volume and direction, thereby meeting the peak-shaving needs of the power grid. The adjustable stator vanes on the compressor can be designed with one, two, or more stages as needed. A single-stage adjustable stator vane typically contains dozens of adjustable blades, and the adjustable blades of an entire stage are circumferentially spaced on the inner ring of the same rotating ring, and their angles are adjusted by the axial rotation of the rotating ring.
[0003] Depending on their design structure, adjustable guide vanes generally include IGV adjustable guide vanes and CV adjustable guide vanes. IGV adjustable guide vanes are generally designed between the intake cylinder and the compressor cylinder, and are used as the first stage guide vanes for adjusting the compressed air along the airflow direction. CV adjustable guide vanes are generally designed on the compressor cylinder, and are used for adjusting the compressed air flow after the IGV adjustable guide vanes.
[0004] Because the adjustable CV stator is located inside the cylinder body, its structure is more complex, requiring higher installation standards for stator angle adjustment and stator centering. However, current tooling can only perform angle adjustment, centering, or torque measurement functions individually. This necessitates constantly changing tooling with different functions during the assembly of the adjustable CV stator to meet the assembly and inspection needs at different stages of the blade assembly, resulting in low production efficiency and high production costs. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model provides a gas turbine adjustable stationary blade assembly and adjustment tooling that can assist in the angle adjustment, centering and torque measurement of CV adjustable stationary blades.
[0006] The present invention adopts the following technical solution:
[0007] This utility model provides a tooling assembly for adjusting adjustable stationary blades of a gas turbine, including an adapter block, a position adjustment template, and a bushing adjustment block. The top surface of the adapter block has a recessed center to form an interface that can be engaged and fixed with a torque wrench connector. The bottom surface of the adapter block is axially detachably connected to the adjustable stationary blade handle, and the axial orthographic projection of the adapter block protrudes beyond the axial orthographic projection of the adjustable stationary blade handle. The position adjustment template has an embedded groove penetrating the top and bottom surfaces at its center, and the adapter block can be embedded and fixed in the embedded groove. The position adjustment template has a pair of positioning holes symmetrically formed on both sides to determine the 0 position, fully open position, and fully closed position of the adjustable stationary blade. The bushing adjustment block has a wrench force-applying component fixed at the center of its top surface and a circular countersunk hole formed by the recessed bottom surface. The adapter block can be accommodated in the circular countersunk hole and rotate freely. The bushing adjustment block has connecting pins on both sides of the circular countersunk hole, and the connecting pins can be inserted and engaged with corresponding pin holes on the adjustable bushing.
[0008] Preferably, the interface on the adapter block is a square interface.
[0009] Preferably, the adapter block has multiple connecting holes spaced apart, connecting the top and bottom surfaces. The bottom surface of the adapter block is recessed to form a receiving groove, which covers the end of the adjustable stationary blade handle. The threaded connector passes through the connecting holes and is screwed onto the end of the adjustable stationary blade handle.
[0010] Preferably, the connecting hole is a countersunk hole.
[0011] Preferably, the adapter block is a circular block, and the diameter of the adjustable stationary blade petiole is less than the diameter of the adapter block and less than the diameter of the circular countersunk hole. The two sides of the adapter block are transversely cut to form two parallel and symmetrical reference surfaces.
[0012] Preferably, the positioning hole group includes a fully open position positioning hole, a 0 position positioning hole, and a fully closed position positioning hole, and the fully open position positioning hole, the 0 position positioning hole, and the fully closed position positioning hole are arranged in a circumferential manner at intervals near the outer periphery of the position adjustment template.
[0013] Preferably, the wrench on the bushing adjusting block has an external hexagonal head design.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0015] When using the gas turbine adjustable stator assembly and adjustment tooling of this utility model, first connect the adapter block to the adjustable stator blade shank in an axially detachable manner, then connect the position adjustment template to the adapter block through the embedded groove, and then measure the rotational torque of the adjustable stator blade by inserting the connector of the measuring torque wrench into the interface on the top surface of the adapter block and turning it.
[0016] Meanwhile, by checking the position of the positioning hole group on the position adjustment template and rotating the position adjustment template and the adapter block together with the torque wrench, the rotation angle of the adjustable stationary vane can be adjusted according to the change in the position of the positioning hole group on the position adjustment template, which can be used to adjust the position of the fully open, 0 position and fully closed position of the adjustable stationary vane.
[0017] After adjusting the angle of the adjustable stationary vane, the position adjustment template can be removed and the bushing adjustment block installed so that the adapter block can be accommodated in the circular countersunk hole, and the connecting pin on the bushing adjustment block can be inserted into the corresponding pin hole on the adjustable bushing. Then, force is applied to the wrench at the wrench's force application point, causing the adjustable bushing and the bushing adjustment block to rotate together. During the rotation, the adjustable bushing moves radially, thereby driving the adjustable stationary vane to adjust its radial position, thus locating the center of the inner ring and completing the centering.
[0018] Obviously, the gas turbine adjustable stator assembly and adjustment tooling of this utility model adopts a split assembly structure, which allows for the adjustment of the angle, centering and torque measurement of the CV adjustable stator by simply replacing individual parts. It eliminates the need for multiple different toolings and the need to frequently replace multiple different toolings to meet the assembly and inspection needs of the CV adjustable stator at different stages, which helps to improve production efficiency and reduce production costs. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the installation structure of the adjustable stator vane in the prior art.
[0020] Figure 2 This is a first-view view of the adapter block on the gas turbine adjustable stator assembly adjustment tooling in this embodiment of the utility model.
[0021] Figure 3 This is a second-view view of the adapter block on the gas turbine adjustable stator assembly adjustment tooling in this embodiment of the utility model.
[0022] Figure 4 This is an installation state diagram of the adapter block on the gas turbine adjustable stator assembly adjustment tooling in an embodiment of this utility model.
[0023] Figure 5 This is a structural diagram of the position adjustment template on the gas turbine adjustable stator assembly adjustment tooling in this embodiment of the utility model.
[0024] Figure 6 This is a first-view installation state diagram of the position adjustment template on the gas turbine adjustable stator assembly adjustment tooling in this embodiment of the utility model.
[0025] Figure 7This is a second-view installation state diagram of the position adjustment template on the gas turbine adjustable stator assembly adjustment combination tooling in this embodiment of the utility model.
[0026] Figure 8 This is a first-view view of the bushing adjustment block on the gas turbine adjustable stator assembly adjustment tooling in this embodiment of the utility model.
[0027] Figure 9 This is a second-view view of the bushing adjustment block on the gas turbine adjustable stator assembly adjustment tooling in this embodiment of the utility model.
[0028] Figure 10 This is a first-view installation state diagram of the bushing adjustment block on the adjustable stationary blade assembly and adjustment tooling of the gas turbine, according to an embodiment of this utility model.
[0029] Figure 11 This is a second-view installation state diagram of the bushing adjustment block on the adjustable stationary blade assembly and adjustment tooling of the gas turbine, according to an embodiment of this utility model.
[0030] The reference numerals in the attached figures are explained as follows:
[0031] 1. Square nut; 7. Position adjustment template
[0032] 2. Rocker arm 71, embedded groove
[0033] 3. Adjustable bushing 72, fully open position positioning hole
[0034] 4. Adjustable stationary vane, 73, 0 position positioning hole
[0035] 5. Holding ring 74, fully closed position positioning hole
[0036] 6. Adapter block; 8. Bushing adjusting block
[0037] 61. Interface; 81. Wrench force application component
[0038] 62. Connecting hole; 82. Circular countersunk hole
[0039] 63. Receiving slot; 83. Connecting pin Detailed Implementation
[0040] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.
[0041] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0043] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0044] It should be noted that, see Figure 1 The existing CV adjustable vane structure includes a square nut 1, a rocker arm 2, an adjustable bushing 3, an adjustable vane 4, and a retaining ring 5. The adjustable vane 4 is coaxially inserted into the adjustable bushing 3. The adjustable bushing 3 is installed into the mounting hole of the retaining ring 5. The square nut 1 is screwed into the mounting hole of the retaining ring 5 and axially limits the adjustable bushing 3 within the mounting hole. The rocker arm 2 is axially hinged to the adjustable vane 4 and can drive the adjustable vane 4 to deflect.
[0045] See Figures 2 to 11This embodiment provides a gas turbine adjustable stationary blade assembly and adjustment tooling, including an adapter block 6, a position adjustment template 7, and a bushing adjustment block 8. The top surface of the adapter block 6 has a recessed center forming an interface 61 that can be engaged and fixed with a torque wrench connector. The bottom surface of the adapter block 6 is axially detachably connected to the blade shank of the adjustable stationary blade 4, and the axial orthographic projection of the adapter block 6 protrudes beyond the axial orthographic projection of the blade shank of the adjustable stationary blade 4. The position adjustment template 7 has an embedded groove 71 at its center that extends through the top and bottom surfaces, allowing the adapter block 6 to be embedded and fixed. The position adjustment template 7 is fixed in the embedded groove 71. A pair of positioning holes are symmetrically opened on both sides of the center to determine the 0 position, fully open position and fully closed position of the adjustable stationary blade 4. The top surface of the bushing adjustment block 8 is fixed with a wrench force application part 81 and the bottom surface is recessed to form a circular countersunk hole 82. The adapter block 6 can be accommodated in the circular countersunk hole 82 and rotate freely. The bushing adjustment block 8 is provided with connecting pins 83 on both sides of the circular countersunk hole 82. The connecting pins 83 can be inserted and engaged with the corresponding pin holes on the adjustable bushing 3.
[0046] See Figure 4 and Figure 6 In this embodiment, when using the gas turbine adjustable stationary blade assembly and adjustment tooling, first connect the adapter block 6 to the axially detachable blade shank of the adjustable stationary blade 4, then connect the position adjustment template 7 to the adapter block 6 through the embedded groove 71, and then measure the torque of the adjustable stationary blade by inserting the connector of the measuring torque wrench into the interface on the top surface of the adapter block 6 and turning it.
[0047] Meanwhile, by checking the position of the positioning hole group on the position adjustment template 7 and rotating the position adjustment template 7 and the adapter block 6 together with the torque wrench, the rotation angle of the adjustable stationary vane 4 can be adjusted according to the change in the position of the positioning hole group on the position adjustment template 7, which can be used to adjust the position of the fully open, 0 position and fully closed position.
[0048] After completing the angle adjustment of the adjustable stator vane 4, see... Figure 10 and Figure 11 The position adjustment template 7 can be removed and the bushing adjustment block 8 can be installed so that the adapter block 6 can be accommodated in the circular countersunk hole 82, and the connecting pin 83 on the bushing adjustment block 8 can be inserted into the corresponding pin hole on the adjustable bushing 3. Then, force is applied to the wrench at the wrench force application part 81 to make the adjustable bushing 3 and the bushing adjustment block 8 rotate together. During the rotation, the adjustable bushing 3 moves radially, thereby driving the adjustable stationary blade 4 to adjust its radial position, thereby finding the center of the inner ring and completing the centering.
[0049] Obviously, the gas turbine adjustable stator assembly and adjustment tooling of this embodiment adopts a split assembly structure, so that only the individual parts can be replaced to realize the angle adjustment, centering and torque measurement of the CV adjustable stator. It is no longer necessary to equip multiple different toolings and to meet the assembly and inspection needs of the CV adjustable stator at different stages by frequently assembling and replacing multiple different toolings, which helps to improve production efficiency and reduce production costs.
[0050] Preferably, see Figure 2 and Figure 3 The interface 61 on the adapter block 6 is a square interface, which can be locked and fixed with the square connector on the torque measuring wrench, thereby realizing the torque measurement and angle adjustment of the adjustable stationary blade 4.
[0051] Preferably, in this embodiment, the side length of the square interface on the adapter block 6 is 1 / 4 inch, 3 / 8 inch, 1 / 2 inch, or 3 / 4 inch, to match the actual size of the square connector on the torque measuring wrench.
[0052] Preferably, see Figures 2 to 4 The adapter block 6 has multiple connecting holes 62 spaced apart, connecting the top and bottom surfaces. The bottom surface of the adapter block 6 is recessed to form a receiving groove 63. The receiving groove 63 covers the end of the adjustable stationary blade 4 handle. The threaded connector passes through the connecting holes 62 and is screwed onto the end of the adjustable stationary blade 4 handle.
[0053] When assembling the adjustable stationary blade 4, the adjustable bushing 3 and the adjustable stationary blade 4 should be inserted together into the mounting hole of the retaining ring 5, and then the adapter block 6 should be connected to the end of the blade handle of the adjustable stationary blade 4 and tightened with threaded fasteners.
[0054] Better, see Figure 4 In this embodiment, the threaded connector is a screw, and the adapter block 6 is axially and detachably connected to the end of the adjustable stator blade 4 handle via the screw.
[0055] Preferably, see Figure 2 and Figure 4 The connecting hole 62 is countersunk to ensure that the threaded connector does not protrude from the top surface of the adapter block 6.
[0056] Preferably, see Figure 2 and Figure 3 The adapter block 6 is a circular block, and the diameter of the petiole of the adjustable stationary blade 4 is less than the diameter of the adapter block 6 and less than the diameter of the circular countersunk hole 82. The two sides of the adapter block 6 are transversely cut to form two parallel and symmetrical reference surfaces.
[0057] Preferably, in this embodiment, the depth of the circular countersunk hole 82 is greater than the thickness of the adapter block 6, and the diameter of the circular countersunk hole 82 is greater than the diameter of the adapter block 6, thereby accommodating the adapter block 6 and ensuring that the adapter block 6 can rotate freely within the circular countersunk hole 82.
[0058] Preferably, in this embodiment, the parallelism between the reference surfaces on both sides of the adapter block 6 is less than 0.03 mm; and the gap between the arc surfaces on both sides of the adapter block 6 and the position adjustment template 7 is within 0.03 mm.
[0059] Furthermore, since the shape of the embedding groove 71 of the position adjustment template 7 is adapted to the shape of the adapter block 6, the embedding groove 71 of the position adjustment template 7 in this embodiment has a shape with symmetrical arc surfaces on the left and right sides and symmetrical reference surfaces on the top and bottom sides. The parallelism between the reference surfaces on both sides of the embedding groove 71 is also less than 0.03mm, and the gap between the circumferential groove wall of the embedding groove 71 and the adapter block 6 is less than 0.03mm.
[0060] Preferably, see Figure 5 The positioning hole group includes a fully open position positioning hole 72, a 0 position positioning hole 73, and a fully closed position positioning hole 74, which are arranged sequentially and circumferentially on the position adjustment template 7 near the outer periphery. The positioning hole group facilitates the measurement of the gap between the adjustable stationary vane 4 and the holding ring 5 and the inner ring at specific angular positions, as well as the torque measurement of the adjustable stationary vane 4 within the fully open and fully closed angle ranges.
[0061] See Figures 5 to 7 When the adjustable vane 4 needs to be adjusted in angle, the current angle of the adjustable vane 4 can be determined by the centrally symmetrical fully open position positioning hole 72, 0 position positioning hole 73, and fully closed position positioning hole 74. For example, when both fully open position positioning holes 72 are in the horizontal position, the adjustable vane 4 is in the fully open angle position; when both 0 position positioning holes 73 are in the horizontal position, the adjustable vane 4 is in the 0 position angle position; when both fully closed position positioning holes 74 are in the horizontal position, the adjustable vane 4 is in the fully closed angle position.
[0062] It should be noted that, in order to ensure that the rotation position of the positioning hole group can accurately reflect the actual scheduling of the adjustable stationary blade 4, the opening position of the fully open position positioning hole 72, the 0 position positioning hole 73 and the fully closed position positioning hole 74 are all determined according to the actual angle of the adjustable stationary blade 4 on the drawing.
[0063] Preferably, see Figure 8 The wrench force application part 81 on the bushing adjusting block 8 is an external hexagonal head shape, so that the bushing adjusting block 8 can be rotated and adjusted by connecting the wrench force application part 81 with a commonly used socket wrench.
[0064] It should be noted that the external hexagonal head wrench force application part 81 on the bushing adjustment block 8 is an external hexagonal nut, and the external hexagonal nut is designed and manufactured according to national standard specifications.
[0065] When using the gas turbine adjustable stator blade assembly and adjustment combination tooling of this embodiment to assemble and adjust all the adjustable stator blades 4 on a single rotating ring, in order to improve production efficiency, the number of transition blocks 6 can be the same as the number of adjustable stator blades 4 on the whole ring, so that one transition block 6 can be installed on each adjustable stator blade 4. The number of position adjustment templates 7 and bushing adjustment blocks 8 should be 4-5, so that multiple people can operate the tooling at the same time to complete the angle adjustment, centering and torque measurement of the adjustable stator blades 4.
[0066] The adjustable stationary vane assembly and adjustment tooling of the gas turbine in this embodiment is applicable to rotating stationary vane machinery in turbomachinery that requires adjustment of the intake air through the stationary vanes, and can be used as a reference for the design of similar adjustable stationary vane tooling in the future.
[0067] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.
Claims
1. A tooling assembly and adjustment unit for adjustable stationary blades of a gas turbine, characterized in that, The assembly includes an adapter block (6), a position adjustment template (7), and a bushing adjustment block (8). The top surface of the adapter block (6) is recessed to form an interface (61) that can be engaged and fixed with a torque wrench connector. The bottom surface of the adapter block (6) is axially detachably connected to the shank of the adjustable stationary blade (4), and the axial orthographic projection of the adapter block (6) protrudes beyond the axial orthographic projection of the shank of the adjustable stationary blade (4). The position adjustment template (7) has an embedded groove (71) that extends through the top and bottom surfaces at its center. The adapter block (6) can be embedded and fixed in the embedded groove (71). The two sides of the adjustment template (7) are symmetrically provided with a pair of positioning holes that can determine the 0 position, fully open position and fully closed position of the adjustable stationary blade (4); the top surface of the bushing adjustment block (8) is fixed with a wrench force application element (81) and the bottom surface is recessed to form a circular countersunk hole (82). The adapter block (6) can be accommodated in the circular countersunk hole (82) and rotate freely. The bushing adjustment block (8) is provided with connecting pins (83) on both sides of the circular countersunk hole (82). The connecting pins (83) can be inserted and engaged with the corresponding pin holes on the adjustable bushing (3).
2. The gas turbine adjustable stator assembly and adjustment tooling according to claim 1, characterized in that, The interface (61) on the adapter block (6) is a square interface.
3. The gas turbine adjustable stator assembly and adjustment tooling according to claim 1, characterized in that, The adapter block (6) has multiple connecting holes (62) spaced apart on its top and bottom surfaces. The bottom surface of the adapter block (6) is recessed to form a receiving groove (63). The receiving groove (63) covers the end of the adjustable stationary blade (4) handle. The threaded connector passes through the connecting holes (62) and is screwed onto the end of the adjustable stationary blade (4) handle.
4. The gas turbine adjustable stator assembly and adjustment tooling according to claim 3, characterized in that, The connecting hole (62) is a countersunk hole.
5. The gas turbine adjustable stator assembly and adjustment tooling according to claim 1, characterized in that, The adapter block (6) is a circular block, and the diameter of the adjustable stationary blade (4) petiole is less than the diameter of the adapter block (6) and less than the diameter of the circular countersunk hole (82). The two sides of the adapter block (6) are transversely cut to form two parallel and symmetrical reference surfaces.
6. The gas turbine adjustable stator assembly and adjustment tooling according to claim 1, characterized in that, The positioning hole group includes a fully open position positioning hole (72), a 0 position positioning hole (73), and a fully closed position positioning hole (74), and the fully open position positioning hole (72), the 0 position positioning hole (73), and the fully closed position positioning hole (74) are arranged in a circumferential manner at intervals near the outer periphery of the position adjustment template (7).
7. The gas turbine adjustable stator assembly and adjustment tooling according to claim 1, characterized in that, The wrench force application part (81) on the bushing adjustment block (8) is an external hexagonal head.