Guide vane fixing device

Abstract

The present invention discloses a guide vane fixing device, which is used to fix the guide vane of an aircraft engine to a turbine casing, and the guide vane fixing device includes a fixing component, a connecting component and a hook component; the fixing component is used to be fixed to the turbine casing; the two ends of the connecting component are respectively connected to the fixing component; one end of the hook component is connected to the connecting component, and the other end of the hook component is used to fix the guide vane from the end of the guide vane. In the guide vane fixing device of the present invention, the hook component is installed on the fixing component through the connecting component, and the end of the guide vane is fixed by the hook component. In the process of installing the guide vane to the turbine casing, the hook component fixes the guide vane away from one end of the turbine casing, so that the two ends of the guide vane are kept horizontal, avoiding the situation where the guide vane is stuck due to the different heights at the two ends of the guide vane, and improving the installation efficiency of the guide vane.

Description

Technical Field

[0001] The invention relates to the field of aero engines, and in particular to a guide vane fixing device. Background Art

[0002] like Figure 1 As shown, the low-pressure turbine stator of the aircraft engine is composed of multiple stages of stators, and each stage of stator is composed of multiple guide vanes 3' (sector segments) to form a complete ring and then fixed on the turbine casing 1'. The fixing method of the guide vane 3' is as follows Figure 2 As shown, a slot is provided on one side of each guide vane 3' close to the front end of the turbine casing 1', and the guide vane 3' is mounted on the turbine casing 1' and the end edge plate of the front-stage outer ring. After the guide vane 3' of this stage forms a complete ring, the end of the guide vane 3' is pressed from the rear end direction of the turbine casing 1' by the retaining ring 4' to limit its axial movement along the turbine casing 1', and then the guide vane 3' is clamped on the turbine casing 1' through the slot of the rear-stage outer ring 5' to limit the radial movement of the guide vane 3' along the turbine casing 1'. The assembly mode of the guide vane 3' is piece by piece. After the complete ring is formed, the retaining ring 4' and the rear-stage outer ring 5' are installed in sequence to fix the guide vane 3' of this stage on the turbine casing 1'. Since the fixing structure of the guide vane 3' is similar to a cantilever beam, during the assembly of the guide vane 3', the inner side of the guide vane 3' is tilted toward the front end direction of the turbine casing 1' due to the influence of gravity, so that the guide vane 3' cannot be hung on the inner wall of the casing. In the conventional assembly process, a pad 2' needs to be placed on the front-stage guide vane 3' to support the rear-stage guide vane 3' from the inside. Since the profile of the guide vane 3' is an irregular plane, the pad 2' cannot be placed horizontally, so that each pad 2' is of different heights, resulting in the rear-stage guide vanes 3' being misaligned and uneven. The overlapping surfaces of adjacent guide vanes 3' are inclined overlaps. When the guide vanes 3' are of different heights, the adjacent guide vanes 3' will bite each other, making the guide vanes 3' unable to move. Once the guide vanes 3' are stuck in installation, the pad 2' needs to be replaced and the placement height of each guide vane 3' needs to be adjusted. The debugging cycle is long, making the installation efficiency of the guide vanes 3' low. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a guide vane fixing device in order to overcome the defect in the prior art that the guide vanes are easily uneven in height and adjacent guide vanes are bitten into each other when the guide vanes are supported by pads.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] A guide vane fixing device is used to fix the guide vane of an aircraft engine to a turbine casing, and the guide vane fixing device comprises:

[0006] A fixing assembly, the fixing assembly being used to be fixed to the turbine casing;

[0007] A connecting component, two ends of which are respectively connected to the fixing component;

[0008] A hook assembly, one end of which is connected to the connecting assembly, and the other end of which is used to fix the guide vane from the end of the guide vane.

[0009] In this solution, the hook assembly is installed on the fixing assembly through the connecting assembly, and the end of the guide vane is fixed by the hook assembly. During the process of installing the guide vane to the turbine casing, the hook assembly fixes the guide vane away from one end of the turbine casing, so that the two ends of the guide vane remain horizontal, avoiding the situation where the guide vane is stuck due to different heights at the two ends of the guide vane, thereby improving the guide vane installation efficiency.

[0010] Preferably, the fixing assembly includes a first fixing member and a second fixing member, the first fixing member is connected to the turbine casing, the second fixing member is fixedly arranged relative to the first fixing member, and two ends of the connecting assembly are respectively connected to the first fixing member and the second fixing member.

[0011] In this solution, by providing a first fixing member and a second fixing member, both ends of the connecting component are respectively connected to the first fixing member and the second fixing member to achieve a fixed connection of the connecting component, thereby avoiding interference between the connecting components caused by the connecting components being connected to the same fixing member.

[0012] Preferably, the first fixing member and the second fixing member are annular members, and the diameter of the second fixing member is smaller than the diameter of the first fixing member.

[0013] In the present solution, the first fixing member and the second fixing member are connected as annular members, and the diameter of the second fixing member is smaller than the diameter of the first fixing member, the outer end of the connecting component is connected to the first fixing member, and the inner end of the connecting component is connected to the second fixing member, so that the connecting component is arranged in the annular area between the first fixing member and the second fixing member, the connecting component is arranged along the radial direction of the first fixing member, and the hook component is adjusted in position along the radial direction of the first fixing member through the connecting component to ensure that the connection point of the hook component and the connecting component can be located directly above the end of the tightened guide vane, and the tightening force of the hook component on the guide vane is ensured to be in the vertical direction.

[0014] Preferably, the second fixing member is fixedly connected to the first fixing member through two oppositely arranged connecting components;

[0015] And / or, the axis of the second fixing member is parallel or colinear with the axis of the turbine casing.

[0016] In the present scheme, the second fixing member is connected to the first fixing member through a relatively arranged connecting assembly. The connecting assembly not only connects the first fixing member and the second fixing member but also suspends the fixing assembly. No additional connecting structure is required between the first fixing member and the second fixing member, thereby simplifying the structure of the guide vane fixing device. The axis of the second fixing member is set to be parallel or colinear with the axis of the turbine casing. The connecting assembly is arranged along the radial direction of the turbine casing, and the hook assembly is perpendicular to the connecting assembly, ensuring that the force applied by the hook assembly to the connecting assembly is perpendicular to the direction of the connecting assembly, thereby avoiding displacement of the connecting assembly due to the non-vertical component force of the hook assembly, and improving the stability of the connection between the hook assembly and the connecting assembly.

[0017] Preferably, the first fixing member and / or the second fixing member are detachably connected to the connecting assembly.

[0018] In the present solution, the first fixing member is used to be installed on the turbine casing. Therefore, the first fixing member is selected according to the size of the turbine casing, the second fixing member is selected according to the size of the guide vane, and the connecting assembly is selected according to the size of the first fixing member and the second fixing member. By arranging the first fixing member, the second fixing member and the connecting assembly as detachable connections, different first fixing members, second fixing members and connecting assemblies can be flexibly selected according to the size of the guide vane to be installed on the turbine casing as needed. The three are assembled to form a guide vane fixing device. The detachable connection design enables the guide vane fixing device to adapt to turbine casings and guide vanes of different sizes, thereby improving the versatility of the guide vane fixing device.

[0019] Preferably, the first fixing member and / or the second fixing member are pin-connected to the connecting assembly.

[0020] In the present solution, the first fixing member, the second fixing member and the connecting component are connected by pins. The pin connection structure is simple and the connection is reliable. When the connecting component needs to change its relative position with the second fixing member, the connecting component can be rotated around the rotating axis of the connecting pin without completely removing the connecting component from the second fixing member, thereby improving the convenience of using the guide vane fixing device.

[0021] Preferably, the connecting assembly includes a connecting rod, the connecting rod is in the shape of a straight rod as a whole, and the connecting rod is arranged along the radial direction of the turbine casing.

[0022] In the present solution, by setting the connecting rod along the radial direction of the turbine casing, the hook assembly is hung on the connecting rod, so that the hook assembly can adjust its position along the radial direction of the turbine casing to fix guide vanes of different lengths, ensuring that the tensioning force of the hook assembly on the guide vane is perpendicular to the guide vane and along the vertical direction, thereby improving the stability of the guide vane fixing device in fixing the guide vane.

[0023] Preferably, a snap-in groove is provided at the bottom of the first fixing member, and the snap-in groove matches the upper edge of the turbine casing.

[0024] In this solution, the first fixing member is clamped to the turbine casing through the clamping groove at the bottom. The first fixing member and the turbine casing are firmly installed and easy to disassemble, thereby improving the loading and unloading speed between the guide vane fixing device and the turbine casing.

[0025] Preferably, the hook assembly further includes a connecting member and a hook, and the hook is connected to the connecting assembly via the connecting member.

[0026] In the present scheme, a connecting rod is arranged along the radial direction of the turbine casing, and a hook is hung on the connecting rod. The hook hangs down vertically along the axial direction of the turbine casing, so that the pulling force of the hook on the guide vane is vertically upward. The pulling force of the hook on the guide vane is theoretically completely along the gravity direction of the guide vane, avoiding the pulling force of the hook on the guide vane to produce a component force not in the gravity direction of the guide vane, thereby improving the stability of the tensioning of the guide vane by the hook.

[0027] Preferably, the hook comprises a clamping portion and a connecting portion, the clamping portions are fixedly provided on both sides of the connecting portion, the cross section of the hook is in a side "U" shape, and the distance between the two clamping portions matches the width of the guide vane end.

[0028] In this solution, the hook is shaped like a side "U" and is clamped to one end of the guide vane when in use. The clamping of the hook and the guide vane is reliable and easy to disassemble. The hook can be quickly and conveniently clamped to the guide vane, thereby improving the installation efficiency of the guide vane.

[0029] The positive and progressive effects of the present invention are:

[0030] The guide vane fixing device of the present invention has a hook component installed on the fixing component through a connecting component, and the end of the guide vane is fixed by the hook component. During the process of installing the guide vane to the turbine casing, the hook component fixes the guide vane at one end away from the turbine casing, so that the two ends of the guide vane remain horizontal, avoiding the situation where the guide vane is stuck due to different heights at the two ends of the guide vane, thereby improving the guide vane installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the turbine stator structure.

[0032] Figure 2 It is a schematic diagram of fixing the stator guide vanes in the prior art.

[0033] Figure 3 It is a schematic diagram of the installation of the guide vane fixing device of the present invention.

[0034] Figure 4 It is a structural schematic diagram of the guide vane fixing device of the present invention installed on the turbine casing.

[0035] Figure 5 It is a schematic structural diagram of the first state of the guide vane fixing device of the present invention.

[0036] Figure 6 It is a schematic diagram of the structure of the guide vane fixing device of the present invention in the second state.

[0037] Figure 7 It is a schematic diagram of fixing a guide vane by the guide vane fixing device of the present invention.

[0038] Description of reference numerals:

[0039] In the prior art:

[0040] Turbine case 1'

[0041] Pad 2'

[0042] Guide vane 3'

[0043] Retaining ring 4'

[0044] Outer ring of rear stage 5'

[0045] In the present invention:

[0046] Guide vane fixing device 100

[0047] Fixing component 1

[0048] The first fixing member 11

[0049] Card slot 111

[0050] The second fixing member 12

[0051] Connect Component 2

[0052] Connecting rod 21

[0053] Hook component 3

[0054] Connector 31

[0055] Hook 32

[0056] Clamping portion 321

[0057] Connection part 322

[0058] Turbine case 200

[0059] Guide vane 300 DETAILED DESCRIPTION

[0060] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0061] like Figure 5As shown, the present invention provides a guide vane fixing device 100, which is used to fix the guide vane 300 of an aircraft engine to the turbine casing 200. The guide vane fixing device 100 includes a fixing component 1, a connecting component 2 and a hook component 3. The fixing component 1 is used to be fixed to the turbine casing 200, and the connecting component 2 and the hook component 3 of the guide vane fixing device 100 are fixedly connected through the fixing component 1 and the turbine casing 200. Figure 4 As shown, the turbine casing 200 is a cylindrical structure as a whole, and multiple stages of stators are installed along the axial direction of the turbine casing 200 . Each stage of stators includes guide vanes 300 distributed along the circumferential direction of the turbine casing 200 .

[0062] Both ends of the connecting component 2 are respectively connected to the fixing component 1 , the connecting component 2 is connected to the turbine casing 200 through the fixing component 1 , and the fixing component 1 is connected as a whole through the connecting component 2 .

[0063] One end of the hook assembly 3 is connected to the connecting assembly 2, and the other end of the hook assembly 3 is used to fix the guide vane 300 from the end of the guide vane 300. One end of the guide vane 300 is fixedly mounted on the wall of the turbine casing 200, and the other end of the guide vane 300 extends along the radial direction of the turbine casing 200 toward the axial direction of the turbine casing 200, and the hook assembly 3 fixes one end of the guide vane 300 close to the axial direction of the turbine casing 200.

[0064] The fixing assembly 1 includes a first fixing member 11 and a second fixing member 12. The first fixing member 11 is connected to the turbine casing 200, and the first fixing member 11 is arranged above the turbine casing 200 through the clamping groove 111. The second fixing member 12 is fixedly arranged relative to the first fixing member 11, and the two ends of the connecting assembly 2 are respectively connected to the first fixing member 11 and the second fixing member 12, and the second fixing member 12 is fixedly connected to the first fixing member 11 through the connecting assembly 2. The material of the fixing assembly 1 and the connecting assembly 2 is selected from a lightweight metal material (such as aluminum alloy) to reduce the overall weight of the guide vane fixing device 100.

[0065] The first fixing member 11 and the second fixing member 12 are annular members, and the diameter of the second fixing member 12 is smaller than the diameter of the first fixing member 11. The first fixing member 11 and the second fixing member 12 are both circular ring members, and the diameter of the second fixing member 12 is smaller than the inner ring of the full ring composed of the same-stage guide vanes 300. When the guide vane 300 is installed on the turbine casing 200, one end of the guide vane 300 is fixedly installed on the turbine casing 200, and the other end of the guide vane 300 extends along the radial direction of the turbine casing 200, and the hook assembly 3 tightens the guide vane 300 away from one end of the turbine casing 200 to ensure that both ends of the guide vane 300 remain horizontal. The end of the guide vane 300 of the same stage away from the turbine casing 200 forms a circle, and the diameter of the second fixing member 12 is smaller than the inner diameter of the circle formed by the end of the guide vane 300 away from the turbine casing 200, so that the hook assembly 3 can move along the axial direction of the connecting assembly 2 to the end of the guide vane 300 away from the turbine casing 200, so that the hook assembly 3 can tighten the end of the guide vane 300 away from the turbine casing 200 in the vertical direction.

[0066] The second fixing member 12 is fixedly connected to the first fixing member 11 through two oppositely arranged connecting assemblies 2, and the two connecting assemblies 2 are located at opposite positions in the circumferential direction of the second fixing member 12 to tighten the second fixing member 12 from the opposite positions. The first fixing member 11 is fixedly connected to the turbine casing 200, the second fixing member 12 and the first fixing member 11 are coaxially arranged, one end of the connecting assembly 2 is connected to the first fixing member 11, and the other end of the connecting assembly 2 is connected to the second fixing member 12. A plurality of connecting assemblies 2 are arranged along the circumferential direction of the first fixing member 11, and at least two connecting assemblies 2 are arranged oppositely to tighten the second fixing member 12. After the second fixing member 12 is connected through the two connecting assemblies 2, other connecting assemblies 2 are installed between the first fixing member 11 and the second fixing member 12 along the circumferential direction of the first fixing member 11 to tighten the guide vanes 300 at various angles in the circumferential direction of each turbine casing 200.

[0067] The axis of the second fixing member 12 is parallel or colinear with the axis of the turbine casing 200. The second fixing member 12 is annular, and the axis of the second fixing member 12 is a straight line passing through the center of the annulus and perpendicular to the annular surface of the second fixing member 12. In this embodiment, the second fixing member 12 is arranged at the axis of the turbine casing 200, that is, the axis of the second fixing member 12 coincides with the axis of the turbine casing 200. In this way, the connecting component 2 is arranged along the circumference of the second fixing member 12, one end of the connecting component 2 always points to the central axis of the turbine casing 200, and the connecting component 2 extends along the radial direction of the turbine casing 200. When the hook component 3 is hung on the connecting component 2, since the guide vanes 300 of the same stage have the same size, different hook components 3 hung at the same position of the connecting component 2 can tighten the guide vanes 300 upward in the vertical direction, without adjusting the position of the connecting component 2 one by one, thereby improving the installation efficiency of the guide vanes 300. In other embodiments, the second fixing member 12 may also be arranged parallel to the axial direction of the turbine casing 200, so that when the connecting component 2 is connected to the second fixing member 12, when the hook component 3 hangs downward from the connecting component 2 along the direction of gravity, the hook component 3 and the connecting component 2 are perpendicular to each other, and the force applied to the connecting component 2 by the hook component 3 due to the tightening of the guide vane 300 is downward in the vertical direction, thereby preventing the connecting component 2 from being subjected to the component force from the hook component 3 in the non-vertical direction, thereby preventing the second fixing member 12 from being displaced due to the component force in the non-vertical direction, and improving the stability of the guide vane fixing device 100 during use.

[0068] The first fixing member 11 and the second fixing member 12 are detachably connected to the connecting component 2. In the present embodiment, the two ends of the connecting component 2 are detachably connected to the first fixing member 11 and the second fixing member 12 respectively. The detachable connection can be connected by a pin, or fixedly connected by a fastener, or a receiving portion is provided on the first fixing member 11 and the second fixing member 12, and the connecting component 2 is inserted into the receiving portion to achieve the detachable connection between the first fixing member 11, the second fixing member 12 and the connecting component 2. In other embodiments, one of the first fixing member 11 or the second fixing member 12 can also be detachably connected to the connecting component 2. When the connecting component 2 needs to be removed, the end of the connecting component 2 detachably connected to the first fixing member 11 or the second fixing member 12 can be removed.

[0069] like Figure 6 As shown, when installing the final outer ring, if the connecting rod 21 blocks the installation of the outer ring, the outer quick-release pin of the connecting rod 21 can be pulled out, and the connecting rod 21 at that location can be turned inward and placed on the inner fixed ring, thereby exposing the space required for the installation of the outer ring.

[0070] like Figure 6As shown, the first fixing member 11 and the second fixing member 12 are pin-connected to the connecting component 2. In this embodiment, the first fixing member 11 and the second fixing member 12 are connected to the connecting component 2 by the pin. After the pin is pulled out, the connecting component 2 can be removed from the fixing component 1. When the pin is not pulled out, the connecting component 2 can rotate around the central axis of the pin. In other embodiments, the first fixing member 11 and the second fixing member 12 can also be connected to the connecting component 2 by fasteners to achieve a detachable connection.

[0071] The connecting assembly 2 includes a connecting rod 21, which is a straight rod as a whole. Pin holes are respectively provided at both ends of the connecting rod 21. Pin seats are respectively provided on the first fixing member 11 and the second fixing member 12. The width of the pin seats matches the width of the connecting rod 21. The pin seats are provided with pin holes for matching with the pin holes on the connecting rod 21. When the connecting rod 21 is installed on the pin seats on the first fixing member 11 or the second fixing member 12, the pin holes at the ends of the connecting rod 21 are aligned with the axes of the pin holes on the pin seats, and then the quick-change pins are inserted along the axial direction of the pin holes to connect the connecting rod 21 and the first fixing member 11 or the second fixing member 12. The connecting rod 21 is arranged along the radial direction of the turbine casing 200.

[0072] like Figure 7 As shown, a snap-in groove 111 is provided at the bottom of the first fixing member 11. The first fixing member 11 is in a circular shape, and an annular snap-in groove 111 is provided along the circumference of the first fixing member 11. The diameter of the snap-in groove 111 matches the diameter of the top of the turbine casing 200. Therefore, after the first fixing member 11 is installed on the turbine casing 200, the snap-in groove 111 matches the upper edge of the turbine casing 200, thereby realizing the aligned installation of the first fixing member 11 and the turbine casing 200, and ensuring that the axis of the first fixing member 11 is aligned with the axis of the turbine casing 200.

[0073] The hook assembly 3 includes a connecting member 31 and a hook 32, and the hook 32 is connected to the connecting assembly 2 through the connecting member 31. The top end of the hook 32 is fixedly connected to the connecting member 31. One end of the connecting member 31 is connected to the hook 32, and the other end of the connecting member 31 is wound and connected to the connecting assembly 2. In this embodiment, the connecting member 31 is a soft rope. In other embodiments, the connecting member 31 can also be a rope made of other flexible materials such as a wire rope or a cotton rope.

[0074] like Figure 3 As shown, the hook 32 includes a clamping portion 321 and a connecting portion 322. The clamping portions 321 are fixedly provided on both sides of the connecting portion 322. When the hook 32 is fixedly connected to the inner side of the guide vane 300, the two clamping portions 321 are respectively fixedly connected to the upper and lower parts of the inner side of the guide vane 300. The cross section of the hook 32 is in a side "U" shape, and the distance between the two clamping portions 321 matches the width of the end of the guide vane 300, so that the two clamping portions 321 can be clamped to the end of the guide vane 300.

[0075] like Figure 4 As shown, the fixing of the guide vane 300 is completed:

[0076] S1, connecting the first fixing member 11 and the second fixing member 12 into one body through the connecting rod 21 and the quick-release latch to form a fixing assembly 1;

[0077] S2, placing the fixing assembly 1 on the rear mounting edge of the receiver;

[0078] S3, such as Figure 2 As shown, the guide vane 300 is installed on the turbine casing 200, and the front clamping groove of the guide vane 300 clamps the front stage outer wall and the casing mounting groove;

[0079] S4. Install the connection component 2 on the fixing component 1 according to the installation position of the guide vane 300;

[0080] S5. After hooking the hook 32 with the soft rope onto the inner side of the guide vane 300, the soft rope is wound around the connecting rod 21 to achieve the inner side suspension fixation of the guide vane 300;

[0081] S6, repeat S3-S5 to complete the installation of all guide vanes 300 of this stage;

[0082] S7, repeat S1-S6 until all guide vanes 300 of this stage are installed;

[0083] 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 guide vane fixing device, used for fixing the guide vane of an aircraft engine to a turbine casing, characterized in that: The guide vane fixing device comprises a fixing component, a connecting component and a hook component; The fixing assembly is used to be fixed to the turbine casing; Two ends of the connecting component are respectively connected to the fixing component; The fixing assembly includes a first fixing member and a second fixing member, the first fixing member and the second fixing member are annular members, and the diameter of the second fixing member is smaller than the diameter of the first fixing member. The first fixing member is connected to the turbine casing, the second fixing member is fixedly arranged on the inner side of the first fixing member relative to the first fixing member, the connecting assembly includes a connecting rod, and the two ends of the connecting rod are respectively connected to the first fixing member and the second fixing member; one end of the hook assembly is connected to the second fixing member, and the other end of the hook assembly is used to fix the guide vane from the end of the guide vane away from the turbine casing.

2. The guide vane fixing device according to claim 1, characterized in that: The second fixing member is fixedly connected to the first fixing member through two oppositely arranged connecting components; The axis of the second fixing member is parallel or colinear with the axis of the turbine casing.

3. The guide vane fixing device according to claim 1, characterized in that: The first fixing member and / or the second fixing member are detachably connected to the connecting assembly.

4. The guide vane fixing device according to claim 3, characterized in that: The first fixing member and / or the second fixing member are pin-connected to the connecting assembly.

5. The guide vane fixing device according to claim 1, characterized in that: The connecting rod is in the shape of a straight rod as a whole and is arranged along the radial direction of the turbine casing.

6. The guide vane fixing device according to claim 1, characterized in that: A snap-fitting groove is provided at the bottom of the first fixing member, and the snap-fitting groove matches the upper edge of the turbine casing.

7. The guide vane fixing device according to claim 1, characterized in that: The hook assembly also includes a connecting member and a hook, and the hook is connected to the connecting assembly through the connecting member.

8. The guide vane fixing device according to claim 7, characterized in that: The hook comprises a clamping portion and a connecting portion, the clamping portions are fixedly provided on both sides of the connecting portion, the cross section of the hook is in a side "U" shape, and the distance between the two clamping portions matches the width of the guide vane end.

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