Fixing device and installation method for turbine stator guide vane

Abstract

The present invention discloses a fixing device and installation method for turbine stator guide vanes. The fixing device includes a fixing frame, the fixing frame is connected to the casing; a connecting rope, the connecting rope includes a supporting section, a counterweight section and a connecting section, the supporting section is slidably connected to the fixing frame, the counterweight section and the connecting section are respectively arranged on both sides of the supporting section, the connecting section is used to connect to the guide vane, and a counterweight block is arranged on the counterweight section, and the counterweight block is used to balance the guide vane so that the guide vane is kept in a preset position. This structural form can ensure that the guide vanes in the same level of stator are placed at the same height, avoid the phenomenon that the guide vanes are bitten into each other and cannot be installed, and greatly improve the guide vane installation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of aeroengines, and in particular to a fixing device for turbine stator guide vanes. Background Art

[0002] In the prior art, the low-pressure turbine stator of an aircraft engine is composed of multiple stages of stators from bottom to top, such as Figure 1 As shown, each stage of the stator is composed of a plurality of guide vanes 201 (sector segments) to form a complete ring and then fixed on the turbine casing 200. The diameter and mass of the guide vanes of each stage of the stator are different. The fixing method of the guide vanes is as follows: Figure 2 As shown, the front end of each guide vane is provided with a guide vane slot 209, which is clamped on the end edge plate of the turbine casing 200 and the front stage outer ring 207. After the guide vane of this stage forms a complete ring, the retaining ring 206 is used to press the end of the guide vane from the rear end to limit its axial movement, and then the outer ring slot 210 of the rear stage outer ring 208 is used to clamp it on the turbine casing to limit the radial movement of the guide vane. The guide vane is assembled one by one. After the complete ring is formed, the retaining ring 206 and the rear stage outer ring 208 are installed in sequence to achieve the fixation of the guide vane of this stage on the casing.

[0003] Since the guide vane is similar to a cantilever beam during installation, affected by gravity, the inner side of the guide vane tilts toward the front end, making it impossible for the guide vane to be suspended on the inner wall of the casing. In the conventional assembly process, a pad 300 needs to be placed on the front guide vane 2011 to support the rear guide vane 2012 from the inside. Since the profile of the guide vane is an irregular plane, the pad 300 cannot be placed horizontally, making each pad different in height, which will inevitably cause the rear guide vane 2012 to be misaligned with each other and different in height. The overlapping surface of adjacent guide vanes is an inclined structure 205. When the guide vanes are different in height, the adjacent guide vanes will bite each other, making the guide vanes unable to move. Once the guide vane installation is stuck, it is necessary to replace the pad and adjust the placement height of each guide vane. The debugging cycle is long, making the installation efficiency of the guide vane low. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a fixing device and an installation method for turbine stator guide vanes in order to overcome the defect that adjacent guide vanes are easily bitten into each other during the installation of existing aircraft engine turbine stator guide vanes, resulting in installation jamming and low installation efficiency.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A fixing device for a turbine stator guide vane, the fixing device comprising:

[0007] A fixing frame connected to the casing;

[0008] A connecting rope, the connecting rope comprises a supporting section, a counterweight section and a connecting section, the supporting section is slidably connected to the fixing frame, the counterweight section and the connecting section are respectively arranged on both sides of the supporting section, the connecting section is used to be connected to the guide vane, the counterweight section is provided with a counterweight block, and the counterweight block is used to balance the guide vane so that the inner end of the guide vane is maintained at a preset height.

[0009] In this solution, the fixed frame is used as a fulcrum, and the position of the guide vane, especially the height, is adjusted to a preset position by sliding the support section relative to the fixed frame; adjusting the counterweight block can balance the counterweight section and the connecting section on both sides of the support section, maintain the horizontal state of the guide vane, and thus realize the balancing fixation of the guide vane. This structural form can ensure that the placement height of each guide vane in the same level of stator (stator of the same height) is consistent, avoid the phenomenon that the guide vanes are bitten into each other and cannot be installed, and greatly improve the installation efficiency of the guide vane. This solution has a simple structure, is easy to operate, and has low process cost. When in use, a fixing device can be connected to one or more guide vanes, and multiple fixing devices are set in the same level of stator to realize that the guide vane placement height of each guide vane in the same level of stator can be adjusted. In addition, this solution is universal, and by changing the weight of the counterweight block, it can be applied to the balancing fixation of guide vanes of different weights at different levels. Among them, the inner side of the guide vane refers to the side of the guide vane away from the casing.

[0010] Preferably, a pulley block is provided on the fixing frame, a pulley is provided on the pulley block, and the supporting section passes around the pulley and is slidable on the pulley.

[0011] In this solution, by setting up a pulley group, the support section can roll on the pulley without directly contacting other positions of the fixed frame, changing sliding friction into rolling friction, reducing friction, and more conveniently changing the direction of the pulling force on the connecting section.

[0012] Preferably, the number of the pulleys is two, and the two pulleys are arranged at two ends of the top of the fixing frame.

[0013] In this solution, pulleys are arranged at both ends of the fixed frame, which can prevent the two ends of the hanging connecting rope from interfering with other parts of the fixed frame, ensure that the counterweight section and the connecting section hang vertically, thereby vertically tightening the guide vane and ensuring the accuracy of the balancing fixation.

[0014] Preferably, a vertically penetrating avoidance groove is provided on the fixing frame, so that the connecting rope passes around the pulley and then extends vertically downward through the avoidance groove.

[0015] In this solution, the avoidance groove is used to avoid the connecting rope, allowing the connecting rope to pass vertically, so that the two ends of the connecting rope hanging down avoid other parts of the fixing frame, vertically tightening the guide vane, and further ensuring the accuracy of the balancing fixation.

[0016] Preferably, the fixing device comprises a mounting seat, and the mounting seat is detachably connected to the top of the fixing frame;

[0017] The pulley block also includes a support frame, the pulley is rotatably connected to the support frame, and the support frame is connected to the mounting seat.

[0018] In this solution, the pulley is connected to the mounting seat via a support frame, and the pulley block is detachably connected to the fixing frame via the mounting seat.

[0019] Preferably, the mounting seat is threadedly connected to the fixing frame.

[0020] Preferably, the fixing frame is fixed to the upper edge surface of the casing, the counterweight section is located on the outside of the casing, and the connecting section extends into the inside of the casing.

[0021] In this solution, the counterweight section is arranged on the outside of the casing, so that the operator can adjust the height of the guide vane by pulling the counterweight section, and the operator can also adjust the weight of the counterweight block.

[0022] Preferably, the radial length of the fixing frame along the casing is adjustable so as to adjust the radial distance of the connecting section relative to the casing.

[0023] In this solution, since the installation diameters and sizes of the guide vanes at different levels (the guide vanes at different heights) are different, the distance of the connecting section relative to the casing in the radial direction is set to be adjustable, which can meet the installation and fixation of the guide vanes at different levels of the turbine stator and has good versatility. Among them, the installation diameter refers to the distance from one end of the guide vane away from the casing to the other end.

[0024] Preferably, the fixing frame comprises a first bracket extending along the radial direction and a second bracket extending along the radial direction, and the second bracket is slidable along the radial direction relative to the first bracket.

[0025] In this solution, the second bracket slides relative to the first bracket to adjust the radial length of the fixed bracket along the casing, thereby adjusting the radial distance of the connecting section relative to the casing.

[0026] Preferably, the second bracket is vertically fixed relative to the first bracket.

[0027] In this solution, the second bracket is kept fixed in the vertical direction, which can prevent the second bracket from being separated from the first bracket in the vertical direction, causing the fixing frame to fall over and cause the guide vane fixing to fail.

[0028] Preferably, the top surface of the first bracket includes a protrusion extending in the radial direction, and the bottom surface of the second bracket is provided with a groove matching the protrusion, and the groove is slidable along the protrusion;

[0029] Alternatively, a groove extending in the radial direction is provided on the top surface of the first bracket, and a protrusion matching the groove is provided on the bottom surface of the second bracket, and the protrusion is slidable along the groove.

[0030] Preferably, a through positioning hole is formed on the side of the protruding portion, and a through slot extending in the radial direction is formed on the side of the second bracket, and the through slot passes through the side of the second bracket;

[0031] The fixing device comprises a limiting rod, and the limiting rod passes through the positioning hole and the through slot to prevent the second bracket from being separated from the first bracket.

[0032] In this solution, the positioning hole is used to install a limit rod, which passes through the protrusion and the second bracket. On the one hand, the limit rod can prevent the second bracket from detaching from the first bracket in the vertical direction. On the other hand, since the through groove has a certain length, it can prevent the second bracket from moving excessively out of the first bracket in the radial direction and causing the two to detach.

[0033] Preferably, the fixing device further comprises a clamping mechanism, and the clamping mechanism is used to fix the second bracket to the first bracket after the second bracket moves to a preset position.

[0034] In this solution, the clamping mechanism is used to lock the extension length of the fixed bracket.

[0035] Preferably, the clamping mechanism includes a clamping bolt, the second bracket is arranged above the first bracket, the second bracket is provided with a clamping threaded hole from top to bottom, the clamping bolt is threadedly connected to the clamping threaded hole, and the bottom of the clamping bolt abuts against the first bracket.

[0036] In this solution, by providing a clamping bolt, the second bracket is pressed against the first bracket, thereby locking and fixing the extension length of the bracket.

[0037] Preferably, the fixing device comprises a hook, the hook is connected to the connecting section, and the hook is used to support one or more guide vanes.

[0038] In this solution, the hook is used to pull up the guide vane to achieve the connection between the connecting section and the guide vane and prevent the guide vane from tilting.

[0039] Preferably, the hook comprises a vertically arranged main board, the upper and lower ends of the main board are bent inward to form an extension portion, the extension portion is an arc surface structure, and the arc length of the extension portion is the arc segment on the inner side of the guide vane, so that the hook forms a fan-shaped segment structure.

[0040] In this solution, the fan-shaped segment structure is used to hook the inner cylindrical step of the guide vane. When the hook is placed at the overlap of two adjacent guide vanes, the two guide vanes can be stably hooked, thereby improving installation efficiency.

[0041] Preferably, a support platform is connected to the bottom of the counterweight section, and the support platform is used to support the counterweight block.

[0042] In this solution, by providing a support platform, the counterweight block can be easily replaced, thereby improving the installation efficiency.

[0043] A method for installing a turbine stator guide vane, characterized in that the method uses the fixing device for the turbine stator guide vane as described above, and the method comprises the following steps:

[0044] S1. Installing one end of the guide vane close to the casing on the side wall of the casing;

[0045] S2, installing the fixing frame on the upper edge of the casing;

[0046] S3, extending the connecting section into the inner side of the casing, the connecting section is connected to the inner end of the guide vane, and the counterweight section is placed outside the casing;

[0047] S4. Place corresponding counterweight blocks in the counterweight section so that the guide vane is in a stable state.

[0048] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0049] The positive and progressive effects of the present invention are:

[0050] For the fixing device, the fixing frame is used as a fulcrum, and the position of the guide vane, especially the height of the inner side of the guide vane, is adjusted to a preset position by sliding the support section relative to the fixing frame; adjusting the counterweight block can balance the counterweight section and the connecting section on both sides of the support section, maintain the horizontal state of the guide vane, and thus realize the balancing fixation of the guide vane. This structural form can ensure that the placement height of each guide vane in the same level of stator (stator of the same height) is consistent, avoid the phenomenon that the guide vanes are stuck to each other and cannot be installed, and greatly improve the installation efficiency of the guide vanes. This scheme has a simple structure, is easy to operate, and has low process cost. When in use, a fixing device can be connected to one or more guide vanes, and multiple fixing devices are set in the same level of stator to realize that the guide vane placement height of each guide vane in the same level of stator can be adjusted. In addition, this scheme has universality, and by changing the weight of the counterweight block, it can be applied to the balancing fixation of guide vanes of different weights at different levels. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a schematic diagram of the structure of the stators of each stage of the turbine in the prior art.

[0052] Figure 2 It is a schematic diagram of the installation of stator guide vanes in the prior art.

[0053] Figure 3 Schematic diagram of the structure of a fixing device according to a preferred embodiment of the present invention.

[0054] Figure 4 It is a schematic diagram of the state in which the fixing device according to the preferred embodiment of the present invention is installed on the casing.

[0055] Figure 5 It is a schematic diagram of the three-dimensional structure of a fixing device according to a preferred embodiment of the present invention.

[0056] Figure 6 FIG. 4 is a schematic diagram of the three-dimensional structure of a fixing frame according to a preferred embodiment of the present invention.

[0057] Figure 7 Schematic diagram of the structure of a fixing frame according to a preferred embodiment of the present invention.

[0058] Figure 8 It is a schematic diagram of the three-dimensional structure of the first bracket and the second bracket according to a preferred embodiment of the present invention.

[0059] Fig. 9 The figure is a flow chart of a method for installing a turbine stator guide vane according to a preferred embodiment of the present invention.

[0060] Description of reference numerals:

[0061] Reference numerals of the prior art

[0062] Receiver 200

[0063] Guide vane 201

[0064] Front guide vane 2011

[0065] Rear stage guide vane 2012

[0066] Block 300

[0067] Slope structure 205

[0068] Retaining ring 206

[0069] Pre-stage outer ring 207

[0070] Post-stage outer ring 208

[0071] Guide vane slot 209

[0072] The outer ring groove 210 of the present invention is a reference numeral

[0073] Fixing device 100

[0074] Receiver 200

[0075] Guide vane 201

[0076] Cylindrical steps 202

[0077] Fixed mounting hole 203

[0078] Fixed bracket 1

[0079] Connecting rope 2

[0080] Support segment 21

[0081] Counterweight section 22

[0082] Counterweight 221

[0083] Connection section 23

[0084] Pulley 11

[0085] Mounting Block 12

[0086] Mounting seat threaded hole 121

[0087] Mounting bolt 122

[0088] Pulley 111

[0089] Support frame 112

[0090] Avoidance slot 13

[0091] First bracket 14

[0092] The second bracket 15

[0093] Raised portion 141

[0094] Mounting bolt 142

[0095] Mounting threaded hole 143

[0096] Positioning hole 144

[0097] Groove 151

[0098] Through slot 152

[0099] Limit rod 16

[0100] Clamping mechanism 17

[0101] Tightening bolt 171

[0102] Press threaded hole 172

[0103] Hook 18

[0104] Motherboard 181

[0105] Extension 182

[0106] Support table 19 DETAILED DESCRIPTION

[0107] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0108] This embodiment discloses a fixing device 100 for a turbine stator guide vane. Figure 3-8 As shown, the fixing device 100 includes a fixing frame 1 and a connecting rope 2. The fixing frame 1 is connected to the casing 200; the connecting rope 2 includes a supporting section 21, a counterweight section 22 and a connecting section 23, the supporting section 21 is slidably connected to the fixing frame 1, the counterweight section 22 and the connecting section 23 are respectively arranged on both sides of the supporting section 21, the connecting section 23 is used to connect to the guide vane 201, and a counterweight block 221 is arranged on the counterweight section 22, and the counterweight block 221 is used to balance the guide vane 201 so that the inner end of the guide vane 201 is maintained at a preset height.

[0109] In this embodiment, the fixing frame 1 is used as a fulcrum, and the position, especially the height, of the guide vane 201 is adjusted to a preset position by sliding the support section 21 relative to the fixing frame 1; the counterweight block 221 is adjusted to balance the counterweight sections 22 and the connecting section 23 on both sides of the support section 21, and maintain the horizontal state of the guide vane 201, so as to achieve the balancing fixation of the guide vane 201. This structural form can ensure that the placement heights of the guide vanes 201 in the same level of stators (stators of the same height) are consistent, avoid the phenomenon that the guide vanes 201 are stuck to each other and cannot be installed, and greatly improve the installation efficiency of the guide vanes 201. This solution has a simple structure, is easy to operate, and has a low process cost. When in use, a fixing device 100 can be connected to one or more guide vanes 201, and multiple fixing devices 100 are set in the same level of stators to achieve that the placement heights of the guide vanes 201 of each guide vane 201 in the same level of stators can be adjusted. In addition, this solution is universal and can be applied to the balancing fixation of guide vanes 201 of different weights at different stages by changing the weight of the counterweight block 221. The inner side of the guide vane refers to the side of the guide vane away from the casing.

[0110] The fixing frame 1 is provided with a pulley block 11, and a pulley 111 is provided on the pulley block 11. The support section 21 passes around the pulley 111 and can slide on the pulley 111. By providing the pulley block 11, the support section 21 can roll on the pulley 111 without directly contacting other positions of the fixing frame 1, and the sliding friction is changed into rolling friction, the friction force is reduced, and the direction of the pulling force on the connecting section 23 is more convenient to change.

[0111] There are two pulleys 111, which are arranged at both ends of the top of the fixing frame 1. The pulleys 111 are arranged at both ends of the fixing frame 1, which can prevent the two ends of the connecting rope 2 hanging down from interfering with other parts of the fixing frame 1, ensure that the counterweight section 22 and the connecting section 23 hang down vertically, thereby vertically tightening the guide vane 201 and ensuring the accuracy of the balancing fixation.

[0112] The fixing frame 1 is provided with a vertically penetrating avoidance groove 13, so that the connecting rope 2 passes through the avoidance groove 13 and extends vertically downward after passing through the pulley 111. The avoidance groove 13 is used to avoid the connecting rope 2, allowing the connecting rope 2 to pass vertically, so that the two ends of the connecting rope 2 hanging down avoid other parts of the fixing frame 1, and the guide vane 201 is vertically tightened, further ensuring the accuracy of the balancing fixation.

[0113] The fixing device 100 includes a mounting seat 12, which is detachably connected to the top of the fixing frame 1; the pulley block 11 also includes a support frame 112, the pulley 111 is rotatably connected to the support frame 112, and the support frame 112 is connected to the mounting seat 12. The pulley 111 is connected to the mounting seat 12 through the support frame 112, and the pulley block 11 is detachably connected to the fixing frame 1 through the mounting seat 12. The mounting seat 12 is threadedly connected to the fixing frame 1. Specifically, a mounting seat threaded hole 121 is provided on the mounting seat 12, and the mounting seat 12 is connected to the fixing frame 1 through the mounting seat threaded hole 121 and the mounting seat bolt 122.

[0114] The fixing frame 1 is fixed to the upper edge surface of the casing 200, the counterweight section 22 is located outside the casing 200, and the connecting section 23 extends into the inside of the casing 200. The counterweight section 22 is arranged outside the casing 200, so that the operator can adjust the height of the guide vane 201 by pulling the counterweight section 22, and the operator can also adjust the weight of the counterweight block 221.

[0115] The fixing bracket 1 is threadedly connected to the casing 200 . A fixing installation hole 203 is provided on the upper edge surface of the casing 200 . A mounting threaded hole 143 is correspondingly provided on the fixing bracket 1 . The mounting bolt 142 is connected to the mounting threaded hole 143 and the fixing installation hole 203 to connect the fixing bracket 1 to the casing 200 .

[0116] It should be noted that Figure 2Only three fixing devices 100 are shown in the figure, which is intended to indicate the installation position of the fixing devices 100 on the casing 200. In actual use, multiple fixing devices 100 are arranged along the circumference of the casing 200 so that each guide vane 201 can be covered by the fixing device 100. A fixing device 100 can be connected to one or more guide vanes 201. The radial length of the fixing frame 1 along the casing 200 is adjustable to adjust the radial distance of the connecting section 23 relative to the casing 200. Since the installation diameters and sizes of the guide vanes 201 at various levels (the guide vanes 201 at different heights) are different, the radial distance of the connecting section 23 relative to the casing 200 is set to be adjustable, which can meet the installation and fixation of the guide vanes 201 at various levels of the turbine stator, and has good versatility. Among them, the installation diameter refers to the distance from one end of the guide vane away from the casing to the other end.

[0117] The fixing frame 1 includes a first bracket 14 extending in the radial direction and a second bracket 15 extending in the radial direction, and the second bracket 15 is slidable in the radial direction relative to the first bracket 14. The radial length of the fixing frame 1 along the casing 200 is adjusted by sliding the second bracket 15 relative to the first bracket 14, thereby adjusting the radial distance of the connecting section 23 relative to the casing 200. Two pulley blocks 11 are respectively arranged on the edges of the first bracket 14 and the second bracket 15, so that the radial movement of the second bracket 15 can drive the connecting section 23 to move in the radial direction. The second bracket 15 is kept fixed in the vertical direction relative to the first bracket 14. It can prevent the second bracket 15 from being disengaged from the first bracket 14 in the vertical direction, and the fixing frame 1 from tipping over, resulting in the failure of the fixing of the guide vane 201.

[0118] In this embodiment, the top surface of the first bracket 14 includes a radially extending protrusion 141, and the bottom surface of the second bracket 15 is provided with a groove 151 matching the protrusion 141, and the groove 151 can slide along the protrusion 141. In other alternative embodiments, the top surface of the first bracket 14 can also be provided with a radially extending groove 151, and the bottom surface of the second bracket 15 can be provided with a protrusion 141 matching the groove 151, and the protrusion 141 can slide along the groove 151.

[0119] A positioning hole 144 is provided on the side of the protrusion 141, and a through slot 152 extending in the radial direction is provided on the side of the second bracket 15. The through slot 152 passes through the side of the second bracket 15. The fixing device 100 includes a limiting rod 16, which passes through the positioning hole 144 and the through slot 152 to prevent the second bracket 15 from being separated from the first bracket 14. The positioning hole 144 is used to install the limiting rod 16, which passes through the protrusion 141 and the second bracket 15. On the one hand, the limiting rod 16 can prevent the second bracket 15 from being separated from the first bracket 14 in the vertical direction. On the other hand, since the through slot 152 has a certain length, it can prevent the second bracket 15 from being excessively moved out of the first bracket 14 in the radial direction to cause the two to be separated.

[0120] In other alternative embodiments, the positioning hole 144 may be opened on the side of the second bracket 15, and the through groove 152 may be set on the side of the protrusion 141. The limiting rod 16 passes through the positioning hole 144 and the through groove 152, which can also prevent the second bracket 15 from detaching from the first bracket 14.

[0121] The fixing device 100 may further include a clamping mechanism 17, which is used to fix the second bracket 15 to the first bracket 14 after the second bracket 15 moves to a preset position. The clamping mechanism 17 is used to lock the extension length of the fixing bracket.

[0122] The clamping mechanism 17 may include a clamping bolt 171. The second bracket 15 is disposed above the first bracket 14. A clamping threaded hole 172 is provided through the second bracket 15 from top to bottom. The clamping bolt 171 is threadedly connected to the clamping threaded hole 172. The bottom of the clamping bolt 171 abuts against the first bracket 14. By providing the clamping bolt 171, when the clamping bolt 171 is tightened, the upper surface of the protrusion 141 of the first bracket 14 can be compressed, so that the second bracket 15 is compressed against the first bracket 14, thereby locking and fixing the extension length of the bracket.

[0123] The fixing device 100 may further include a hook 18, which is connected to the connecting section 23 and is used to support one or more guide vanes 201. The hook 18 is used to pull up the guide vane 201 to achieve the connection between the connecting section 23 and the guide vane 201, and prevent the guide vane 201 from tilting.

[0124] The hook 18 includes a main board 181 arranged vertically, and the upper and lower ends of the main board 181 are bent inward to form an extension portion 182. The extension portion 182 is a curved surface structure, and the arc length of the extension portion 182 is the arc segment inside the guide vane 201, so that the hook 18 is formed into a fan-shaped segment structure. The fan-shaped segment structure is used to hook the inner cylindrical step 202 of the guide vane 201. When the hook 18 is placed at the overlap of two adjacent guide vanes, the two guide vanes 201 can be stably hooked, the installation efficiency is improved, and the number of fixing devices is reduced. The arc length of the hook 18 is about 1 / 2-1 / 3 of the arc segment inside a single guide vane 201.

[0125] The bottom of the counterweight section 22 is connected to a support platform 19, which is used to support the counterweight block 221. The counterweight block 221 can be easily replaced, thereby improving the installation efficiency. The material of the connecting rope 2 can be selected according to the existing materials on site, including but not limited to steel cables, steel wire ropes, soft ropes and other materials.

[0126] This embodiment also discloses a method for installing a turbine stator guide vane. The installation method utilizes the above-mentioned fixing device for the turbine stator guide vane. Figure 3-9 As shown, the installation method includes the following steps:

[0127] S1, installing one end of the guide vane 201 close to the casing 200 on the side wall of the casing 200;

[0128] S2, installing the fixing frame 1 on the upper edge of the casing 200;

[0129] S3, extending the connecting section 23 into the inner side of the casing 200, connecting the connecting section 23 to the inner end of the guide vane 201, and placing the counterweight section 22 into the outer side of the casing 200;

[0130] S4. Place the corresponding counterweight block 221 on the counterweight section 22 to make the guide vane 201 in a stable state.

[0131] In an alternative embodiment, the installation method comprises the following steps:

[0132] S11, installing the guide vane 201 on the turbine casing 200, with the guide vane clamping groove of the guide vane 201 clamping the front stage outer ring and the casing 200 mounting groove;

[0133] S12, place the fixing frame 1 on the upper edge of the casing 200, align the mounting threaded hole 143 and the fixing mounting hole 203, and fix them with 142 and nuts;

[0134] S13, after hooking the hook 18 to the inner side of the guide vane, pass the connecting rope 2 through the two pulleys 111 in sequence and put it on the outer side of the casing 200;

[0135] S14, adjusting the position of the second bracket 15 so that the connecting rope 2 can vertically pull the inner side of the guide vane 201 from the inner side;

[0136] S15, tighten the clamping bolt 171 to lock the second bracket 15;

[0137] S16, placing a counterweight corresponding to the guide vane 201 on the support platform 19 of the connecting rope 2, so that the guide vane 201 is in a stable state;

[0138] S17. Repeat steps S11-S16 until all guide vanes of this stage are installed.

[0139] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A fixing device for a turbine stator guide vane, characterized in that: The fixing device comprises: A fixing frame connected to the casing; A connecting rope, the connecting rope comprising a supporting section, a counterweight section and a connecting section, the supporting section is slidably connected to the fixing frame, the counterweight section and the connecting section are respectively arranged on both sides of the supporting section, the connecting section is used to be connected to the guide vane, the counterweight section is provided with a counterweight block, and the counterweight block is used to balance the guide vane so that the inner end of the guide vane is maintained at a preset height; The fixing frame is fixed to the upper edge of the casing, the counterweight section is located on the outside of the casing, and the connecting section extends into the inside of the casing; The fixing frame serves as a fulcrum, and the position of the guide vane is adjusted by sliding the supporting section relative to the fixing frame.

2. The fixing device for turbine stator guide vanes according to claim 1, characterized in that: The fixing frame is provided with a pulley block, the pulley block is provided with a pulley, and the supporting section passes around the pulley and can slide on the pulley.

3. The fixing device for turbine stator guide vanes according to claim 2, characterized in that: The number of the pulley blocks is two, and the two pulley blocks are arranged at two ends of the top of the fixing frame.

4. The fixing device for turbine stator guide vanes according to claim 3, characterized in that: The fixing frame is provided with a vertically penetrating avoidance groove, so that the connecting rope passes through the avoidance groove and then extends vertically downward after passing around the pulley.

5. The fixing device for turbine stator guide vanes according to claim 2, characterized in that: The fixing device comprises a mounting seat, and the mounting seat is detachably connected to the top of the fixing frame; The pulley block also includes a support frame, the pulley is rotatably connected to the support frame, and the support frame is connected to the mounting seat.

6. The fixing device for turbine stator guide vanes according to claim 5, characterized in that: The mounting seat is threadedly connected to the fixing frame.

7. The fixing device for turbine stator guide vanes according to claim 1, characterized in that: The radial length of the fixing frame along the casing is adjustable so as to adjust the distance of the connecting section relative to the casing in the radial direction.

8. The fixing device for turbine stator guide vanes according to claim 7, characterized in that: The fixing frame includes a first bracket extending along the radial direction and a second bracket extending along the radial direction, and the second bracket is slidable along the radial direction relative to the first bracket.

9. The fixing device for turbine stator guide vanes according to claim 8, characterized in that: The second bracket is vertically fixed relative to the first bracket.

10. The fixing device for turbine stator guide vanes according to claim 8, characterized in that: The top surface of the first bracket includes a protrusion extending in the radial direction, and the bottom surface of the second bracket is provided with a groove matching the protrusion, and the groove is slidable along the protrusion; Alternatively, a groove extending in the radial direction is provided on the top surface of the first bracket, and a protrusion matching the groove is provided on the bottom surface of the second bracket, and the protrusion is slidable along the groove.

11. The fixing device for turbine stator guide vanes according to claim 10, characterized in that: A through positioning hole is formed on the side of the protruding portion, and a through slot extending in the radial direction is formed on the side of the second bracket, wherein the through slot passes through the side of the second bracket; The fixing device comprises a limiting rod, and the limiting rod passes through the positioning hole and the through slot to prevent the second bracket from being separated from the first bracket.

12. The fixing device for turbine stator guide vanes according to claim 8, characterized in that: The fixing device further comprises a clamping mechanism, and the clamping mechanism is used to fix the second bracket to the first bracket after the second bracket moves to a preset position.

13. The fixing device for turbine stator guide vanes according to claim 12, characterized in that: The clamping mechanism includes a clamping bolt. The second bracket is arranged above the first bracket. A clamping threaded hole is penetrated through the second bracket from top to bottom. The clamping bolt is threadedly connected to the clamping threaded hole. The bottom of the clamping bolt abuts against the first bracket.

14. The fixing device for turbine stator guide vanes according to claim 1, characterized in that: The fixing device comprises a hook, which is connected to the connecting section and is used to support one or more guide vanes.

15. The fixing device for turbine stator guide vanes according to claim 14, characterized in that: The hook comprises a vertically arranged main board, the upper and lower ends of the main board are bent inward to form an extension portion, the extension portion is a curved surface structure, and the arc length of the extension portion is the arc segment inside the guide vane, so that the hook forms a fan-shaped segment structure.

16. The fixing device for turbine stator guide vanes according to claim 1, characterized in that: The bottom of the counterweight section is connected with a support platform, and the support platform is used to support the counterweight block.

17. A method for installing a turbine stator guide vane, characterized in that: The installation method utilizes the fixing device for turbine stator guide vanes according to any one of claims 1 to 16, and the installation method comprises the following steps: S1. Installing one end of the guide vane close to the casing on the side wall of the casing; S2, installing the fixing frame on the upper edge of the casing; S3, extending the connecting section into the inner side of the casing, the connecting section is connected to the inner end of the guide vane, and the counterweight section is placed outside the casing; S4. Place corresponding counterweight blocks in the counterweight section so that the guide vane is in a stable state.

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