Adjustable Pipeline Fixing Device and Aeroengine

Abstract

The present invention discloses an adjustable pipeline fixing device and an aero-engine, which comprises a mounting support and a hoop for cooperating with the mounting support to fix the pipeline. The mounting support includes an arc seat, a through rod disposed on the outer wall surface of the arc seat for connecting the engine casing, mounting plates respectively disposed at two ends of the arc seat, a tensioning screw rod movably connected to the mounting plate, and a tensioning mechanism for driving the tensioning screw rod to move along the axial direction of the tensioning screw rod to tension the hoop. Two ends of the hoop are respectively connected to the corresponding tensioning screw rods. By adjusting the position of the tensioning screw rod and / or the hoop in the axial direction of the arc seat, compensation for the axial displacement deviation of the pipeline is achieved. The structure is simple, the connection is reliable, the displacement deviation of the pipeline can be compensated in multiple degrees of freedom, and it has a certain universality.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engines, and in particular, to an adjustable pipeline fixing device. In addition, the present invention also relates to an aero-engine including the above adjustable pipeline fixing device. Background Art

[0002] Aero-engine pipelines, mainly used for the transportation of media such as fuel, lubricating oil, and air, are an important part of the engine accessory system. During the use of the engine, faults such as fracture, oil leakage, and oil seepage often occur. The faults of pipeline fracture, oil leakage, and oil seepage are closely related to the coupled vibration of the pipeline system. Usually, in the design of aero-engine pipelines, vibration damping clamps and their mounting brackets are arranged on the pipelines to strengthen the fixation of the pipelines and improve the vibration characteristics of the pipelines.

[0003] Currently, as Figure 1 shown, the vibration damping clamp includes a first fixing plate 100 and a second fixing plate 200. The pipeline is clamped by the cooperation of the first fixing plate 100 and the second fixing plate 200 to achieve pipeline fixation; the fixing form on the aero-engine is to design a thin-walled mounting bracket on the engine casing. The first fixing plate 100 and the second fixing plate 200 are provided with mounting holes, and bolts pass through the mounting holes and are connected to the mounting bracket.

[0004] During the processing of aero-engine pipelines, manufacturing deviations will exist. Assembly personnel need to straighten the pipelines according to actual needs to complete the assembly. Due to factors such as manufacturing deviations and assembly alignment of the pipelines, there will be a certain difference between the actual position of the pipelines and the designed state, resulting in deviations in the connection hole positions between the mounting brackets and the clamps.

[0005] The current fixing structure of the vibration damping clamp and the mounting bracket can only offset the pipeline position deviation through the thin-walled deformation of the clamp and the mounting bracket itself, without adjustment ability and with limited displacement compensation ability. When the installation deviation is too large, there will be a situation where it cannot be installed, or permanent deformation of the mounting bracket may occur due to excessive prestress applied during installation. In addition, due to the limited compensation ability of the bracket, stress concentration deformation is likely to occur after the engine works for a long time, ultimately leading to static strength problems such as fatigue fracture of the mounting bracket and reduction of service life. Summary of the Invention

[0006] The present invention provides an adjustable pipeline fixing device and an aero-engine to solve the technical problem that the existing vibration damping clamp for fixing aero-engine pipelines does not have adjustment ability and has limited displacement compensation ability.

[0007] According to one aspect of the present invention, an adjustable pipeline fixing device is provided, which includes a mounting support and a strap for cooperating with the mounting support to fix a pipeline. The mounting support includes an arc seat, a through rod disposed on the outer wall surface of the arc seat and used for connecting an engine casing, mounting plates respectively disposed at two ends of the arc seat, a tensioning screw movably connected to the mounting plate, and a tensioning mechanism for driving the tensioning screw to move along the axis of the tensioning screw to tension the strap. Two ends of the strap are respectively connected to the corresponding tensioning screws, and the axial displacement deviation of the pipeline is compensated by adjusting the position of the tensioning screw and / or the strap along the axial direction of the arc seat.

[0008] Further, a damping bushing is disposed on the inner wall surface of the arc seat and / or the inner wall surface of the strap.

[0009] Further, a double-headed wedge-shaped clamping spring and a compression nut are sleeved on the through rod. A casing connection seat is disposed on the engine casing. Wedge-shaped holes adapted to the double-headed wedge-shaped clamping spring are formed in the compression nut and the casing connection seat. The compression nut is threadedly connected to the casing connection seat. By rotating the compression nut, the double-headed wedge-shaped clamping spring is tightened / loosened on the through rod to realize the position adjustment of the arc seat along the axial direction of the through rod and positioning after adjustment.

[0010] Further, a first groove is formed on the outer cylindrical surface of the double-headed wedge-shaped clamping spring, and a second groove is formed on the inner cylindrical surface of the double-headed wedge-shaped clamping spring. The length of the second groove is greater than the length of the first groove.

[0011] Further, the through rod is disposed along the radial direction of the arc seat, and the arc seat and the two mounting plates are symmetrically disposed with respect to the axis of the through rod.

[0012] Further, the tensioning mechanism is a lock nut. The tensioning screw movably passes through the mounting plate, and two ends of the tensioning screw are respectively connected to the lock nut and the strap.

[0013] Further, a kidney-shaped hole is formed in the mounting plate. The length direction of the kidney-shaped hole is parallel to the axial direction of the arc seat, and the tensioning screw passes through the kidney-shaped hole.

[0014] Further, a connecting pin is disposed on the tensioning screw. The axis of the connecting pin is parallel to the axial direction of the arc seat. A third groove for clamping the strap is formed on the outer wall surface of the connecting pin. The width of the third groove is greater than the width of the strap.

[0015] Further, the mounting support further includes a snap ring.

[0016] According to another aspect of the present invention, an aircraft engine is provided, which includes the above-mentioned adjustable pipeline fixing device.

[0017] The present invention has the following beneficial effects:

[0018] The adjustable pipeline fixing device of the present invention has an outer wall surface of the arc seat connected to the engine casing through a through rod. The through rod has better structural strength and rigidity than the thin-walled mounting support plate of the transmission, which can improve the vibration characteristics of the pipeline; mounting plates are arranged on the two end heads of the arc seat, and a tightening screw is arranged on each mounting plate. The two tightening screws are respectively connected to the two ends of the hoop, and the tightening screw can be driven to extend and retract relative to the mounting plate through the tensioning mechanism; when the pipeline has no displacement deviation on its radial plane, the inner wall surface of the arc seat fits with the outer wall surface of the pipeline, and the length of the tightening screw extending out of the mounting plate is adjusted so that the hoop hugs the pipeline tightly, and the arc seat and The clamp cooperates to fix the pipeline; when the pipeline has displacement deviation on its radial plane, the inner wall surface of the arc seat does not contact the outer wall surface of the pipeline, and the clamp is made to hold the pipeline tightly by adjusting the length of the tightening screw extending out of the mounting plate. Since the pipeline is a rigid pipe, the pipeline can also be fixed. The arc seat plays the role of supporting the clamp, which can compensate for the displacement deviation of the pipeline on the radial plane; the axial displacement deviation of the pipeline is compensated by adjusting the position of the tightening screw and / or the clamp along the axial direction of the arc seat. It has a simple structure, reliable connection, can compensate for the displacement deviation of the pipeline with multiple degrees of freedom, and has a certain degree of versatility.

[0019] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a structural diagram of an existing vibration damping clamp;

[0022] Figure 2 1 is a schematic structural diagram of an adjustable pipeline fixing device according to a preferred embodiment of the present invention;

[0023] Figure 3 is a structural schematic diagram of a mounting support according to a preferred embodiment of the present invention;

[0024] Figure 4 is a structural schematic diagram of a mounting plate according to a preferred embodiment of the present invention;

[0025] Figure 5It is a schematic structural diagram of a double-headed wedge-shaped clamping spring according to a preferred embodiment of the present invention;

[0026] Figure 6 It is a cross-sectional view of a double-headed wedge-shaped clamping spring according to a preferred embodiment of the present invention.

[0027] Legend:

[0028] 100, the first fixing plate; 200, the second fixing plate; 1, the mounting seat; 2, the hoop; 11, the arc seat; 12, the through rod; 13, the mounting plate; 131, the kidney-shaped hole; 14, the tensioning screw; 141, the connecting pin; 142, the third groove; 15, the locking nut; 16, the snap ring; 3, the damping bushing; 4, the double-headed wedge-shaped clamping spring; 41, the first groove; 42, the second groove; 5, the compression nut; 6, the casing connecting seat; 7, the pipeline. Specific embodiments

[0029] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways defined and covered by the following.

[0030] Please refer to Figures 2 to 6 , the adjustable pipeline fixing device of this embodiment includes a mounting seat 1 and a hoop 2 for cooperating with the mounting seat 1 to fix the pipeline 7. The mounting seat 1 includes an arc seat 11, a through rod 12 disposed on the outer wall surface of the arc seat 11 and used for connecting the engine casing, mounting plates 13 respectively disposed at two ends of the arc seat 11, a tensioning screw 14 movably connected to the mounting plate 13, and a tensioning mechanism for driving the tensioning screw 14 to move along the axial direction of the tensioning screw 14 to tension the hoop 2. The two ends of the hoop 2 are respectively connected to the corresponding tensioning screws 14, and the axial displacement deviation of the pipeline 7 is compensated by adjusting the positions of the tensioning screw 14 and / or the hoop 2 in the axial direction of the arc seat 11.

[0031] The adjustable pipeline fixing device of this embodiment has the outer wall surface of the arc seat 11 connected to the engine casing through the through rod 12. The through rod 12 has better structural strength and stiffness compared to the traditional thin-walled mounting support plate, and can improve the vibration characteristics of the pipeline 7; mounting plates 13 are arranged at both ends of the arc seat 11, and a tension screw 14 is arranged on each mounting plate 13. The two tension screws 14 are respectively connected to both ends of the hoop 2, and the tension screw 14 can be driven to expand and contract relative to the mounting plate 13 through the tensioning mechanism; when there is no displacement deviation of the pipeline 7 in its radial plane, the inner wall surface of the arc seat 11 fits with the outer wall surface of the pipeline 7. Adjust the length of the tension screw 14 extending out of the mounting plate 13 so that the hoop 2 tightly holds the pipeline 7, and the arc seat 11 and the hoop 2 cooperate to fix the pipeline 7; when there is a displacement deviation of the pipeline 7 in its radial plane, the inner wall surface of the arc seat 11 does not contact the outer wall surface of the pipeline 7. Adjust the length of the tension screw 14 extending out of the mounting plate 13 so that the hoop 2 tightly holds the pipeline 7. Since the pipeline 7 is a rigid pipe, the pipeline 7 can also be fixed. The arc seat 11 plays a role in supporting the hoop 2 and can compensate for the displacement deviation of the pipeline 7 in the radial plane; by adjusting the position of the tension screw 14 and / or the hoop 2 in the axial direction of the arc seat 11, the compensation for the axial displacement deviation of the pipeline 7 can be realized. Its structure is simple, the connection is reliable, it can compensate for the displacement deviation of the pipeline 7 in multiple degrees of freedom, and has a certain universality.

[0032] As Figure 2 and Figure 3 shown, in this embodiment, a damping bushing 3 is arranged on the inner wall surface of the arc seat 11 and / or the inner wall surface of the hoop 2. The damping bushing 3 can play a buffering role, thereby improving the vibration characteristics of the pipeline 7. The size and layout position of the damping bushing 3 need to be adjusted according to the position of the pipeline 7, and the shaping of the pipeline 7 should be avoided as much as possible; as Figure 2 shown, when the axis of the arc seat 11 coincides with the axis of the pipeline 7, damping bushings 3 are evenly arranged on the inner wall surface of the arc seat 11 and the inner wall surface of the hoop 2. The damping bushings 3 can wrap the pipeline 7 and provide buffering for vibrations in all directions; when there is still a gap between the inner wall surface of the arc seat 11 and the pipeline 7 after the hoop 2 contacts and is tensioned with the pipeline 7, a damping bushing 3 is arranged on the inner wall surface of the arc seat 11, and the damping bushing 3 can fill the gap between the pipeline 7 and the arc seat 11, strengthening the fixing effect on the pipeline 7. Optionally, the damping bushing 3 has a variety of size specifications to be applicable to pipelines 7 with different outer diameters..

[0033] As Figure 2 and Figure 5As shown, in this embodiment, a double-headed wedge-shaped clamping spring 4 and a compression nut 5 are sleeved on the through rod 12. A casing connection seat 6 is arranged on the engine casing. Wedge-shaped holes adapted to the double-headed wedge-shaped clamping spring 4 are provided on the compression nut 5 and the casing connection seat 6. The compression nut 5 and the casing connection seat 6 are connected by threads. By rotating the compression nut 5, the double-headed wedge-shaped clamping spring 4 is tightened / loosened on the through rod 12 to achieve the position adjustment of the arc seat 11 along the axial direction of the through rod 12 and positioning after adjustment; the double-headed wedge-shaped clamping spring 4 is an overall cylindrical thin-walled elastic element, and both ends are wedge-shaped heads. The wedge-shaped heads have a certain elastic deformation ability. The wedge-shaped heads and elastic deformation of the double-headed wedge-shaped clamping spring itself can achieve displacement deviation compensation in multiple directions of the pipeline; the double-headed wedge-shaped clamping spring 4 and the compression nut 5 can slide on the through rod 12. The compression nut 5 is screwed to the casing connection seat 6. After the arc seat 11 is adjusted to the specified position, the compression nut 5 is tightened, so that the wedge-shaped holes on the compression nut 5 and the casing connection seat 6 squeeze the wedge-shaped heads at both ends of the double-headed wedge-shaped clamping spring 4, making the wedge-shaped heads at both ends of the double-headed wedge-shaped clamping spring 4 tighten the through rod 12, thereby fixing the relative position of the arc seat 11 and the engine casing; since the pipeline 7 is a rigid pipeline and the through rod 12 and the arc seat 11 are fixedly connected, if the through rod 12 is connected to the casing connection seat 6 by threads, during the process of rotating the through rod 12 to make the arc seat 11 approach the pipeline 7, the arc seat 11 will interfere with the pipeline 7; in order to avoid the interference between the arc seat 11 and the pipeline 7, an activity connection structure in which the through rod 12 and the arc seat 11 can rotate relative to each other is adopted. When the aeroengine is running, the pipeline 7 can drive the arc seat 11 to vibrate relative to the through rod 12, making it difficult to improve the vibration characteristics of the pipeline 7; therefore, a structure in which the double-headed wedge-shaped clamping spring 4 is tightened / loosened on the through rod 12 is adopted. When the mounting bracket 1 is connected to the casing of the aeroengine, first, the double-headed wedge-shaped clamping spring 4 and the compression nut 5 are sleeved on the through rod 12, and the through rod 12 is passed through the wedge-shaped hole on the casing connection seat 6. The double-headed wedge-shaped clamping spring 4 and the compression nut 5 are pushed to make the compression nut 5 screwed to the casing connection seat 6 but not tightened. At this time, the through rod 12 can move relative to the casing connection seat 6 along its own axis direction, thereby driving the arc seat 11 to compensate for the displacement deviation on the radial plane of the pipeline 7. After the arc seat 11 moves to the specified position, the compression nut 5 is tightened, so that the wedge-shaped holes on the compression nut 5 and the casing connection seat 6 squeeze the wedge-shaped heads at both ends of the double-headed wedge-shaped clamping spring 4. The wedge-shaped heads at both ends of the double-headed wedge-shaped clamping spring 4 are deformed under pressure and tighten the through rod 12, thereby fixing the relative position of the arc seat 11 and the engine casing. The positioning structure formed by the cooperation of the wedge-shaped hole and the wedge-shaped head has reliable connection and strong stability. It not only avoids the interference between the arc seat 11 and the pipeline 7, but also has a large displacement deviation compensation range (the moving range of the double-headed wedge-shaped clamping spring 4 on the through rod 12) on the radial plane of the pipeline 7. In addition, the through rod 12 has better structural strength and stiffness compared with the traditional thin-walled mounting plate, and can improve the vibration characteristics of the pipeline 7.

[0034] As Figure 5 and Figure 6As shown in the figure, in this embodiment, a first groove 41 is formed on the outer cylindrical surface of the double-headed wedge-shaped clamping spring 4, and a second groove 42 is formed on the inner cylindrical surface of the double-headed wedge-shaped clamping spring 4. The length of the second groove 42 is greater than that of the first groove 41. This structural design is ingenious, enabling the middle section of the double-headed wedge-shaped clamping spring 4 to have a certain elastic deformation ability. When the two ends of the double-headed wedge-shaped clamping spring 4 are pressed, the middle section of the double-headed wedge-shaped clamping spring 4 arches from the inside to the outside, ensuring that the wedge-shaped heads at both ends of the double-headed wedge-shaped clamping spring 4 can tightly hold the through rod 12. Optionally, the first groove 41 and the second groove 42 are U-shaped grooves, and the corners of the U-shaped grooves are transitioned with arcs, which can prevent the corners from breaking when the two ends of the double-headed wedge-shaped clamping spring 4 are pressed, and can improve the service life of the double-headed wedge-shaped clamping spring 4.

[0035] As Figure 2 and Figure 3 shown in the figure, in this embodiment, the through rod 12 is arranged along the radial direction of the arc seat 11, ensuring that when the through rod 12 drives the arc seat 11 to move, the inner arc surface of the arc seat 11 can fit with the outer wall surface of the pipeline 7. The arc seat 11 and the two mounting plates 13 are symmetrically arranged about the axis of the through rod 12, which can ensure the stability of the mounting support 1 and improve the vibration characteristics of the pipeline 7.

[0036] As Figure 2 and Figure 3 shown in the figure, in this embodiment, the tensioning mechanism is a lock nut 15. The tensioning screw 14 is movably passed through the mounting plate 13, and both ends of the tensioning screw 14 are respectively connected to the lock nut 15 and the hoop 2. The tensioning screw 14 can move relative to the mounting plate 13 along its own axis. One end of the tensioning screw 14 is connected to the hoop 2, and the other end passes through the kidney-shaped hole 131 and is screwed to the lock nut 15. The lock nut 15 abuts against the mounting plate 13. By rotating the lock nut 15, the length of the tensioning screw 14 extending out can be adjusted. By respectively adjusting the lengths of the tensioning screws 14 extending out on both sides of the mounting plate 13, the displacement deviation in the radial plane of the pipeline 7 can be compensated.

[0037] As Figure 4 shown in the figure, in this embodiment, a kidney-shaped hole 131 is formed on the mounting plate 13. The length direction of the kidney-shaped hole 131 is arranged parallel to the axis direction of the arc seat 11. The tensioning screw 14 is passed through the kidney-shaped hole 131. One end of the tensioning screw 14 is connected to the hoop 2, and the other end passes through the kidney-shaped hole 131 and is screwed to the lock nut 15. When the hoop 2 is not tensioned, the tensioning screw 14 can move along the length direction of the kidney-shaped hole 131, enabling the hoop 2 to compensate for the axial displacement deviation of the pipeline 7. Even if there is a deviation in the axial fixed position of the pipeline 7, the pipeline 7 can still be fixed smoothly, thereby improving the vibration characteristics of the pipeline 7.

[0038] As Figure 2 and Figure 4As shown, in this embodiment, connection pins 141 are arranged on the tensioning screw rod 14. The axis of the connection pin 141 is arranged parallel to the axis direction of the arc seat 11. A third groove 142 for clamping the strap 2 is formed on the outer wall surface of the connection pin 141. The width of the third groove 142 is greater than the width of the strap 2. The two ends of the strap 2 are respectively sleeved in the third grooves 142 on the corresponding connection pins 141. When the strap 2 is not tensioned, the ends of the strap 2 can slide in the third grooves 142. When the strap 2 is moved to the designated position, the locking nut 15 is rotated to tension the strap 2. Even if there is a deviation in the axial fixed position of the pipeline 7, the pipeline 7 can be successfully fixed, thereby improving the vibration characteristics of the pipeline 7.

[0039] As Figure 4 shown, in this embodiment, a kidney-shaped hole 131 is formed in the mounting plate 13. The length direction of the kidney-shaped hole 131 is arranged parallel to the axis direction of the arc seat 11. The tensioning screw rod 14 passes through the kidney-shaped hole 131. Connection pins 141 are arranged on the tensioning screw rod 14. The axis of the connection pin 141 is arranged parallel to the axis direction of the arc seat 11. A third groove 142 for clamping the strap 2 is formed on the outer wall surface of the connection pin 141. The width of the third groove 142 is greater than the width of the strap 2. The length direction of the kidney-shaped hole 131 is parallel to the axis direction of the connection pin 141, which can further increase the displacement compensation of the strap 2 in the axial direction of the pipeline 7.

[0040] As Figure 2 and Figure 3 shown, in this embodiment, the mounting support 1 further includes an open snap ring 16. On the one hand, during assembly, by sleeving the open snap ring 16 on the pipeline 7 to be fixed, the hands of the operator can be liberated and the mounting support 1 can be prevented from falling. On the other hand, when there is a gap between the pipeline 7 and the arc seat 11, the open snap ring 16 can deform to assist the strap 2 in clamping the pipeline 7 and prevent the strap 2 from breaking. Optionally, the opening of the open snap ring 16 faces downward, which can prevent dust from accumulating at the opening of the open snap ring 16. Optionally, a damping bushing 3 is arranged on the inner wall surface of the open snap ring 16.

[0041] An aeroengine includes the adjustable pipeline fixing device described above. Loosen the locking nut 15 on one side of the arc seat 11, and remove the tension screw 14 and the hoop 2 on the same side from the kidney-shaped hole 131 on the mounting plate 13. Then, fit the snap ring 16 and the damping bushing 3 onto the pipeline 7 to be fixed. Next, wrap the hoop 2 around the pipeline 7 from the other side and wrap it around the damping bushing 3. Pass the tension screw 14 through the kidney-shaped hole 131 on the mounting plate 13, and thread the locking nut 15 onto the tension screw 14 to prevent the tension screw 14 from slipping off. Adjust the axial positions of the tension screw 14 and the hoop 2. By rotating the locking nut 15, adjust the extended length of the tension screw 14 to ensure that the through rod 12 section can be inserted into the wedge-shaped hole of the casing connection seat 6 at a more ideal position. Push the double-headed wedge-shaped clamping spring 4 and the compression nut 5 so that the compression nut 5 is threaded onto the casing connection seat 6 but not tightened. At this time, the through rod 12 can move relative to the casing connection seat 6 along its own axis direction, thereby driving the arc seat 11 to compensate for the displacement deviation on the radial plane of the pipeline 7. After the arc seat 11 moves to the specified position, tighten the compression nut 5 so that the compression nut 5 and the wedge-shaped hole on the casing connection seat 6 squeeze the wedge-shaped heads at both ends of the double-headed wedge-shaped clamping spring 4. The wedge-shaped heads at both ends of the double-headed wedge-shaped clamping spring 4 are deformed under pressure and hold the through rod 12 tightly, thereby fixing the relative position of the arc seat 11 and the engine casing. The structure of the adjustable pipeline fixing device is ingenious, facilitating disassembly, assembly, and maintenance. Compared with the traditional thin-wall support plate clamp structure, it has better structural strength and stiffness, and has strong compensation function and anti-bending deformation ability. The structure using the double-headed wedge-shaped clamping spring 4 for positioning is reliable and stable in connection, which is the core of the entire adjustable pipeline fixing device. The wedge-shaped head and elastic deformation of the double-headed wedge-shaped clamping spring 4 itself can realize the compensation of displacement deviation in multiple directions of the pipeline. Its structure is simple, the connection is reliable, and it can cooperate with the hoop 2 to realize the compensation of displacement deviation of the pipeline 7 in multiple degrees of freedom, having a certain generality.

[0042] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An adjustable pipeline fixing device, characterized in that, it includes an installation support (1) and a hoop (2) used to cooperate with the installation support (1) to fix the pipeline. The installation support (1) includes an arc seat (11), a through rod (12) disposed on the outer wall surface of the arc seat (11) and used to connect the engine casing, mounting plates (13) respectively disposed at two ends of the arc seat (11), a tensioning screw rod (14) movably connected to the mounting plate (13), and a tensioning mechanism used to drive the tensioning screw rod (14) to move along the axial direction of the tensioning screw rod (14) to tension the hoop (2). Two ends of the hoop (2) are respectively connected to the corresponding tensioning screw rods (14). By adjusting the position of the tensioning screw rod (14) and / or the hoop (2) along the axial direction of the arc seat (11), compensation for the axial displacement deviation of the pipeline is achieved. A double-headed wedge-shaped clamping spring (4) and a compression nut (5) are sleeved on the through rod (12). A casing connection seat (6) is disposed on the engine casing. Wedge-shaped holes adapted to the double-headed wedge-shaped clamping spring (4) are opened on the compression nut (5) and the casing connection seat (6). The compression nut (5) is threadedly connected to the casing connection seat (6). By rotating the compression nut (5), the double-headed wedge-shaped clamping spring (4) is made to hold / loosen the through rod (12), so as to achieve the position adjustment of the arc seat (11) along the axial direction of the through rod (12) and positioning after adjustment. A first groove (41) is opened on the outer cylindrical surface of the double-headed wedge-shaped clamping spring (4), and a second groove (42) is opened on the inner cylindrical surface of the double-headed wedge-shaped clamping spring (4). The length of the second groove (42) is greater than the length of the first groove (41). The first groove (41) and the second groove (42) are U-shaped grooves. A kidney-shaped hole (131) is opened on the mounting plate (13). The length direction of the kidney-shaped hole (131) is arranged parallel to the axial direction of the arc seat (11). The tensioning screw rod (14) passes through the kidney-shaped hole (131). A connecting pin (141) is disposed on the tensioning screw rod (14). The axis of the connecting pin (141) is arranged parallel to the axial direction of the arc seat (11). A third groove (142) for clamping the hoop (2) is opened on the outer wall surface of the connecting pin (141). The width of the third groove (142) is greater than the width of the hoop (2). The installation support (1) further includes an open snap ring (16), and the opening of the open snap ring (16) faces downward.

2. The adjustable pipeline fixing device according to claim 1, characterized in that, a damping bush (3) is disposed on the inner wall surface of the arc seat (11) and / or the inner wall surface of the hoop (2).

3. The adjustable pipeline fixing device according to claim 1 or 2, characterized in that, The through rod (12) is arranged along the radial direction of the arc seat (11), and the arc seat (11) and the two mounting plates (13) are symmetrically arranged about the axis of the through rod (12).

4. The adjustable pipeline fixing device according to claim 1 or 2, wherein The tensioning mechanism is a locking nut (15), the tensioning screw rod (14) is movably inserted through the mounting plate (13), and the two ends of the tensioning screw rod (14) are respectively connected with the locking nut (15) and the hoop (2).

5. An aeroengine, characterized in that, Comprising the adjustable pipeline fixing device according to any one of claims 1 to 4.

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