Adjustable pipeline fixing device and aero-engine

Abstract

The invention discloses an adjustable pipeline fixing device and an aero-engine. The adjustable pipeline fixing device comprises a mounting support and a strap used for being matched with the mounting support to fix a pipeline. The mounting support comprises an arc seat, through rods and mounting plates, wherein the through rods are arranged on the outer wall face of the arc seat and used for being connected with an engine case, and the mounting plates are arranged at the two ends of the arc seat correspondingly. The tensioning screw rods are movably connected with the mounting plate, the tensioning mechanism is used for driving the tensioning screw rods to move in the axis direction of the tensioning screw rods so as to tension the strap, and the two ends of the strap are connected with the corresponding tensioning screw rods respectively. The axial displacement deviation of the pipeline is compensated by adjusting the position of the tensioning screw rod and / or the strap in the axial direction of the arc base, and the device is simple in structure, reliable in connection and capable of conducting multi-degree-of-freedom compensation on the displacement deviation of the pipeline and has certain universality.

Description

Technical Field

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

[0002] Aircraft engine pipelines are mainly used to transport fuel, lubricating oil, air and other media, and are an important part of the engine accessory system. During the use of the engine, they often suffer from rupture, oil leakage, oil seepage and other faults. Pipeline rupture, oil leakage, and oil seepage are closely related to the coupled vibration of the pipeline system. Usually, in the design of aircraft engine pipelines, vibration damping clamps and mounting support plates are arranged on the pipelines to strengthen the fixation of the pipelines and improve the vibration characteristics of the pipelines.

[0003] Currently, if Figure 1 As shown, the vibration-damping clamp includes a first fixing plate 100 and a second fixing plate 200, and the first fixing plate 100 and the second fixing plate 200 cooperate to clamp the pipeline, thereby achieving pipeline fixation; the fixing form on the aircraft engine is to design a thin-walled mounting support plate on the casing of the aircraft engine, and the first fixing plate 100 and the second fixing plate 200 are provided with mounting holes, and bolts pass through the mounting holes to connect with the mounting support plate.

[0004] The pipelines of aircraft engines will have manufacturing deviations during the processing, and the assemblers need to correct the pipelines according to actual needs before completing the assembly. Due to factors such as the manufacturing deviation and assembly correction of the pipelines, there will be a certain difference between the actual position of the pipeline and the designed state, which will cause the position of the connection hole between the mounting support plate and the clamp to deviate.

[0005] The current fixing structure of the vibration damping clamp and the mounting support plate can only offset the position deviation of the pipeline through the thin wall deformation of the clamp and the mounting support plate itself, and has no adjustment capability and limited displacement compensation capability. When the installation deviation is too large, it may be impossible to install, or the mounting support plate may be permanently deformed due to excessive prestress applied during installation. In addition, due to the limited compensation capacity of the support plate, stress concentration deformation is prone to occur after the engine has been working for a long time, which eventually leads to static strength problems such as fatigue fracture of the mounting support plate and reduced service life. Summary of the invention

[0006] The invention provides an adjustable pipeline fixing device and an aircraft engine, so as to solve the technical problems that the existing vibration-damping clamp for fixing the pipeline of the aircraft engine has no adjustment capability and limited displacement compensation capability.

[0007] According to one aspect of the present invention, there is provided an adjustable pipeline fixing device, comprising a mounting support and a band used to cooperate with the mounting support to fix the pipeline, the mounting support comprising an arc seat, a through rod arranged on the outer wall surface of the arc seat and used to connect to the engine casing, mounting plates respectively arranged on the two end heads of the arc seat, a tensioning screw movably connected to the mounting plate, and a tensioning mechanism used to drive the tensioning screw to move along the axial direction of the tensioning screw to tension the band, the two ends of the band 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 band along the axial direction of the arc seat.

[0008] Furthermore, a vibration-damping bushing is provided on the inner wall surface of the arc seat and / or the inner wall surface of the hoop.

[0009] Furthermore, a double-headed wedge-shaped clamp spring and a clamping nut are sleeved on the through rod, a casing connecting seat is arranged on the engine casing, wedge-shaped holes adapted to the double-headed wedge-shaped clamp spring are opened on the clamping nut and the casing connecting seat, and the clamping nut is threadedly connected to the casing connecting seat, and the double-headed wedge-shaped clamp spring is tightened / loosened by rotating the clamping nut, so as to realize the position adjustment of the arc seat along the axial direction of the through rod and positioning after adjustment.

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

[0011] Furthermore, the through rod is arranged along the radial direction of the circular arc seat, and the circular arc seat and the two mounting plates are arranged symmetrically about the axis of the through rod.

[0012] Furthermore, the tensioning mechanism is a locking nut, the tensioning screw is movably inserted into the mounting plate, and two ends of the tensioning screw are respectively connected to the locking nut and the hoop.

[0013] Furthermore, a waist-shaped hole is provided on the mounting plate, the length direction of the waist-shaped hole is arranged parallel to the axial direction of the arc seat, and the tightening screw is passed through the waist-shaped hole.

[0014] Furthermore, a connecting pin is arranged on the tightening screw, the axis of the connecting pin is arranged parallel to the axis direction of the arc seat, and a third groove for clamping the hoop is opened on the outer wall surface of the connecting pin, and the width of the third groove is greater than the width of the hoop.

[0015] Furthermore, the mounting support also includes an open snap ring.

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

[0017] The present invention has the following beneficial effects: 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. Compared with the thin-walled mounting support plate of the transmission, the through rod has better structural strength and rigidity, and 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 a 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 band 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 band can 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 band, and 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 band along the axial direction of the arc seat. It has a simple structure and reliable connection, can compensate for the displacement deviation of the pipeline with multiple degrees of freedom, and has a certain degree of versatility.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a structural schematic diagram of an existing vibration-damping clamp; Figure 2 It is a structural schematic diagram of an adjustable pipeline fixing device according to a preferred embodiment of the present invention; Figure 3 is a structural schematic diagram of a mounting support according to a preferred embodiment of the present invention; Figure 4 is a schematic structural diagram of a mounting plate in a preferred embodiment of the present invention; Figure 5 2 is a schematic structural diagram of a double-headed wedge-shaped clip spring according to a preferred embodiment of the present invention; Figure 6 It is a cross-sectional view of a double-headed wedge-shaped clip spring according to a preferred embodiment of the present invention.

[0020] Legend: 100, first fixing plate; 200, second fixing plate; 1, mounting support; 2, hoop; 11, arc seat; 12, through rod; 13, mounting plate; 131, waist-shaped hole; 14, tightening screw; 141, connecting pin; 142, third groove; 15, locking nut; 16, open retaining ring; 3, vibration-damping bushing; 4, double-headed wedge-shaped clip spring; 41, first groove; 42, second groove; 5, clamping nut; 6, casing connecting seat; 7, pipeline. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0022] Please also read Figures 2 to 6 The adjustable pipeline fixing device of this embodiment includes a mounting support 1 and a band 2 for cooperating with the mounting support 1 to fix the pipeline 7. The mounting support 1 includes an arc seat 11, a through rod 12 arranged on the outer wall of the arc seat 11 and used to connect the engine casing, mounting plates 13 respectively arranged on the two end heads 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 band 2. The two ends of the band 2 are respectively connected to the corresponding tensioning screws 14. By adjusting the position of the tensioning screw 14 and / or the band 2 along the axial direction of the arc seat 11, the axial displacement deviation of the pipeline 7 is compensated.

[0023] In the adjustable pipeline fixing device of this embodiment, the outer wall surface of the arc seat 11 is connected to the engine casing through a through rod 12. Compared with the thin-walled mounting support plate of the transmission, the through rod 12 has better structural strength and rigidity, which can improve the vibration characteristics of the pipeline 7; mounting plates 13 are arranged on the two end heads of the arc seat 11, and a tightening screw 14 is arranged on each mounting plate 13. The two tightening screws 14 are respectively connected to the two ends of the hoop 2, and the tightening screws 14 can be driven to extend and retract relative to the mounting plate 13 through the tensioning mechanism; when the pipeline 7 has no displacement deviation on its radial plane, the inner wall surface of the arc seat 11 fits with the outer wall surface of the pipeline 7, and the length of the tightening screw 14 extending out of the mounting plate 13 is adjusted so that the hoop 2 hugs the pipeline 7 tightly, and the arc seat 11 is in a state of being ... The arc seat 11 cooperates with the band 2 to fix the pipeline 7; when the pipeline 7 has a displacement deviation on its radial plane, the inner wall surface of the arc seat 11 does not contact the outer wall surface of the pipeline 7, and the band 2 is made to hug the pipeline 7 by adjusting the length of the tightening screw 14 extending out of the mounting plate 13. 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 band 2, and can compensate for the displacement deviation on the radial plane of the pipeline 7; the axial displacement deviation of the pipeline 7 is compensated by adjusting the position of the tightening screw 14 and / or the band 2 along the axial direction of the arc seat 11. It has a simple structure and reliable connection, can compensate for the displacement deviation of the pipeline 7 with multiple degrees of freedom, and has a certain degree of versatility.

[0024] like Figure 2 and Figure 3 As shown, in this embodiment, a vibration-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 vibration-damping bushing 3 can play a buffering role, thereby improving the vibration characteristics of the pipeline 7. The size and arrangement position of the vibration-damping bushing 3 need to be adjusted according to the position of the pipeline 7 to avoid correcting the pipeline 7 as much as possible; Figure 2 As shown, when the axis of the arc seat 11 coincides with the axis of the pipeline 7, the inner wall surface of the arc seat 11 and the inner wall surface of the hoop 2 are both provided with vibration-damping bushings 3, which can wrap the pipeline 7 and provide vibration in all directions; when the hoop 2 is in contact with the pipeline 7 and is tightened, and there is still a gap between the inner wall surface of the arc seat 11 and the pipeline 7, the vibration-damping bushings 3 are arranged on the inner wall surface of the arc seat 11, and the gap between the pipeline 7 and the arc seat 11 can be filled by the vibration-damping bushings 3, which can enhance the fixing effect of the pipeline 7. Optionally, the vibration-damping bushings 3 have a variety of sizes to be suitable for pipelines 7 with different outer diameters.

[0025] like Figure 2 and Figure 5As shown, in this embodiment, a double-headed wedge-shaped clamp spring 4 and a clamping nut 5 are sleeved on the through rod 12, a casing connecting seat 6 is arranged on the engine casing, and a wedge-shaped hole adapted to the double-headed wedge-shaped clamp spring 4 is opened on the clamping nut 5 and the casing connecting seat 6, and the clamping nut 5 is connected to the casing connecting seat 6 by a thread, and the double-headed wedge-shaped clamp spring 4 is clamped / loosened by rotating the clamping nut 5, so as to realize the position adjustment of the arc seat 11 along the axial direction of the through rod 12 and the positioning after the adjustment; the double-headed wedge-shaped clamp spring 4 is a cylindrical thin-walled elastic element as a whole, and has wedge-shaped heads at both ends. The wedge head has a certain elastic deformation ability, and the wedge head and elastic deformation of the double-headed wedge-shaped clamp spring itself can realize the displacement deviation compensation of the pipeline in multiple directions; The wedge-shaped clamp spring 4 and the clamping nut 5 can slide on the through rod 12, and the clamping nut 5 is threadedly connected to the casing connecting seat 6. After the arc seat 11 is adjusted to the specified position, the clamping nut 5 is tightened so that the wedge-shaped holes on the clamping nut 5 and the casing connecting seat 6 squeeze the wedge-shaped heads at both ends of the double-headed wedge-shaped clamp spring 4, so that the wedge heads at both ends of the double-headed wedge-shaped clamp spring 4 hold the through rod 12 tightly, thereby fixing the relative position of the arc seat 11 and the engine casing; since the pipeline 7 is a rigid pipeline, the through rod 12 and the arc seat 11 are fixedly connected. If the through rod 12 is threadedly connected to the casing connecting seat 6, the arc seat 11 will interfere with the pipeline 7 during the process of rotating the through rod 12 to make the arc seat 11 close to the pipeline 7; and in order to avoid the interference between the arc seat 11 and the pipeline 7, The active connection structure that allows the through rod 12 and the arc seat 11 to rotate relative to each other is used. When the aircraft engine is running, the pipeline 7 can drive the arc seat 11 to vibrate relative to the through rod 12, which makes it difficult to improve the vibration characteristics of the pipeline 7; therefore, a double-headed wedge-shaped clamp spring 4 is used to clamp / loosen the through rod 12. When the support 1 is installed and connected to the casing of the aircraft engine, the double-headed wedge-shaped clamp spring 4 and the clamping nut 5 are first sleeved on the through rod 12, and the through rod 12 is passed through the wedge-shaped hole on the casing connecting seat 6, and the double-headed wedge-shaped clamp spring 4 and the clamping nut 5 are pushed, so that the clamping nut 5 is screwed with the casing connecting seat 6 but not tightened. At this time, the through rod 12 can move relative to the casing connecting seat 6 along its own axial direction, thereby driving the arc seat 11 to vibrate the radial plane of the pipeline 7 The displacement deviation is compensated, and the clamping nut 5 is tightened after the arc seat 11 moves to the specified position, so that the wedge-shaped holes on the clamping nut 5 and the casing connecting seat 6 squeeze the wedge-shaped heads at both ends of the double-headed wedge-shaped clamp spring 4, and the wedge-shaped heads at both ends of the double-headed wedge-shaped clamp spring 4 are compressed and deformed to hold the through rod 12, thereby fixing the relative position of the arc seat 11 and the engine casing. The positioning structure of the wedge-shaped hole and the wedge head is reliably connected and stable, which not only avoids the interference between the arc seat 11 and the pipeline 7, but also has a large displacement deviation compensation range on the radial plane of the pipeline 7 (the moving range of the double-headed wedge-shaped clamp spring 4 on the through rod 12). In addition, compared with the thin-walled mounting support plate of the transmission, the through rod 12 has better structural strength and rigidity, which can improve the vibration characteristics of the pipeline 7.

[0026] like Figure 5 and Figure 6As shown, in this embodiment, a first groove 41 is provided on the outer cylindrical surface of the double-headed wedge-shaped clamp spring 4, and a second groove 42 is provided on the inner cylindrical surface of the double-headed wedge-shaped clamp spring 4, and the length of the second groove 42 is greater than the length of the first groove 41; the structure is cleverly designed, so that the middle section of the double-headed wedge-shaped clamp spring 4 has a certain elastic deformation ability, and when the two ends of the double-headed wedge-shaped clamp spring 4 are compressed, the middle section of the double-headed wedge-shaped clamp spring 4 arches from the inside to the outside, ensuring that the wedge-shaped heads at both ends of the double-headed wedge-shaped clamp spring 4 can 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 arc-shaped transitions, which can avoid the corners from breaking when the two ends of the double-headed wedge-shaped clamp spring 4 are compressed, and can improve the service life of the double-headed wedge-shaped clamp spring 4.

[0027] like Figure 2 and Figure 3 As shown, in this embodiment, the through rod 12 is arranged along the radial direction of the arc seat 11 to ensure 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 to improve the vibration characteristics of the pipeline 7.

[0028] like Figure 2 and Figure 3 As shown, in this embodiment, the tensioning mechanism is a locking nut 15, and the tensioning screw 14 is movably arranged on the mounting plate 13, and the two ends of the tensioning screw 14 are respectively connected to the locking nut 15 and the hoop 2; the tensioning screw 14 can move along its own axis relative to the mounting plate 13, one end of the tensioning screw 14 is connected to the hoop 2, and the other end is threadedly connected to the locking nut 15 after passing through the waist-shaped hole 131, and the locking nut 15 is abutted against the mounting plate 13. By rotating the locking nut 15, the extended length of the tensioning screw 14 can be increased. By adjusting the extended length of the tensioning screws 14 on the mounting plates 13 on both sides respectively, the displacement deviation on the radial plane of the pipeline 7 can be compensated.

[0029] like Figure 4 As shown, in this embodiment, a waist-shaped hole 131 is opened on the mounting plate 13, and the length direction of the waist-shaped hole 131 is arranged parallel to the axial direction of the arc seat 11, and the tensioning screw 14 is passed through the waist-shaped hole 131; one end of the tensioning screw 14 is connected to the band 2, and the other end passes through the waist-shaped hole 131 and is screwed with the locking nut 15. When the band 2 is not tensioned, the tensioning screw 14 can move along the length direction of the waist-shaped hole 131, so that the band 2 can compensate for the axial displacement deviation of the pipeline 7. Even if there is a deviation in the axial fixing position of the pipeline 7, the pipeline 7 can be smoothly fixed, thereby improving the vibration characteristics of the pipeline 7.

[0030] like Figure 2 and Figure 4As shown, in this embodiment, a connecting pin 141 is arranged on the tensioning screw 14, and the axis of the connecting pin 141 is arranged parallel to the axis direction of the arc seat 11. A third groove 142 for clamping the hoop 2 is provided on the outer wall surface of the connecting pin 141, and the width of the third groove 142 is greater than the width of the hoop 2; the two ends of the hoop 2 are respectively sleeved in the third grooves 142 on the corresponding connecting pin 141. When the hoop 2 is not tensioned, the ends of the hoop 2 can slide in the third grooves 142. When the hoop 2 moves to the specified position, the locking nut 15 is rotated to tighten the hoop 2. Even if there is a deviation in the axial fixing position of the pipeline 7, the pipeline 7 can be smoothly fixed, thereby improving the vibration characteristics of the pipeline 7.

[0031] like Figure 4 As shown, in this embodiment, a waist-shaped hole 131 is provided on the mounting plate 13, and the length direction of the waist-shaped hole 131 is arranged parallel to the axial direction of the arc seat 11, and the tightening screw 14 is passed through the waist-shaped hole 131. A connecting pin 141 is arranged on the tightening screw 14, and the axis of the connecting pin 141 is arranged parallel to the axial direction of the arc seat 11, and a third groove 142 for clamping the hoop 2 is provided on the outer wall surface of the connecting pin 141, and the width of the third groove 142 is greater than the width of the hoop 2; the length direction of the waist-shaped hole 131 is parallel to the axial direction of the connecting pin 141, which can further increase the displacement compensation of the hoop 2 in the axial direction of the pipeline 7.

[0032] like Figure 2 and Figure 3 As shown, in this embodiment, the mounting bracket 1 further includes an open snap ring 16. On the one hand, during assembly, the open snap ring 16 is put on the pipeline 7 to be fixed, which can free the operator's hands and prevent the mounting bracket 1 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 be deformed to assist the band 2 to hold the pipeline 7 tightly and prevent the band 2 from breaking. Optionally, the opening of the open snap ring 16 faces downward to prevent dust from collecting at the opening of the open snap ring 16. Optionally, a vibration-damping bushing 3 is arranged on the inner wall surface of the open snap ring 16.

[0033] An aircraft engine includes the above-mentioned adjustable pipeline fixing device. The locking nut 15 on one side of the arc seat 11 is loosened, and the tensioning screw 14 and the band 2 on the same side are taken out from the waist-shaped hole 131 on the mounting plate 13; then the open clamp ring 16 and the vibration-damping bushing 3 are put on the pipeline 7 to be fixed, and then the band 2 is passed around the pipeline 7 from the other side and then wrapped around the vibration-damping bushing 3, and the tensioning screw 14 is passed through the waist-shaped hole 131 on the mounting plate 13, and the tensioning screw 14 is screwed into the lock. The tightening nut 15 prevents the tensioning screw 14 from slipping off; the axial position of the tensioning screw 14 and the band 2 is adjusted, and the extension length of the tensioning screw 14 is adjusted by rotating the locking nut 15 to ensure that the through rod 12 section can be inserted into the wedge-shaped hole of the receiver connecting seat 6 at a relatively ideal position; the double-headed wedge-shaped clip spring 4 and the clamping nut 5 are pushed so that the clamping nut 5 is screwed with the receiver connecting seat 6 but not tightened. At this time, the through rod 12 can move relative to the receiver connecting seat 6 along its own axial direction, thereby bringing The movable arc seat 11 compensates for the displacement deviation on the radial plane of the pipeline 7. After the arc seat 11 moves to the specified position, the clamping nut 5 is tightened, so that the wedge-shaped holes on the clamping nut 5 and the casing connecting seat 6 squeeze the wedge-shaped heads at both ends of the double-headed wedge-shaped clamp spring 4, and the wedge-shaped heads at both ends of the double-headed wedge-shaped clamp spring 4 are compressed and deformed to hold the through rod 12, thereby fixing the relative position of the arc seat 11 and the engine casing; the structure of the adjustable pipeline fixing device is ingenious, easy to disassemble and maintain, and has better structural strength and rigidity than the traditional thin-walled support plate clamp structure, and has a strong compensation function and resistance to bending deformation; the structural connection using the double-headed wedge-shaped clamp spring 4 for positioning is reliable and stable, and is the core of the entire adjustable pipeline fixing device. The wedge-shaped head and elastic deformation of the double-headed wedge-shaped clamp spring 4 itself can realize the displacement deviation compensation of the pipeline in multiple directions. It has a simple structure and reliable connection. It can achieve multi-degree-of-freedom compensation for the displacement deviation of the pipeline 7 in cooperation with the hoop 2, and has certain versatility.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable pipeline fixing device, characterized in that: The invention comprises a mounting support (1) and a band (2) for cooperating with the mounting support (1) to fix a pipeline, wherein the mounting support (1) comprises an arc seat (11), a through rod (12) arranged on the outer wall surface of the arc seat (11) and used to connect to an engine casing, a mounting plate (13) respectively arranged on two end heads 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 band (2), wherein the two ends of the band (2) are respectively connected to the corresponding tensioning screw (14), and the axial displacement deviation of the pipeline is compensated by adjusting the position of the tensioning screw (14) and / or the band (2) along the axial direction of the arc seat (11).

2. The adjustable pipeline fixing device according to claim 1, characterized in that: A vibration-damping bushing (3) is arranged on the inner wall surface of the circular 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: A double-headed wedge-shaped clamp spring (4) and a clamping nut (5) are sleeved on the through rod (12); a casing connecting seat (6) is arranged on the engine casing; a wedge-shaped hole adapted to the double-headed wedge-shaped clamp spring (4) is provided on the clamping nut (5) and the casing connecting seat (6); the clamping nut (5) and the casing connecting seat (6) are connected by threads; the double-headed wedge-shaped clamp spring (4) is tightened / loosened by rotating the clamping nut (5) to achieve position adjustment of the arc seat (11) along the axial direction of the through rod (12) and positioning after adjustment.

4. The adjustable pipeline fixing device according to claim 3, characterized in that: A first groove (41) is provided on the outer cylindrical surface of the double-headed wedge-shaped clamp spring (4), and a second groove (42) is provided on the inner cylindrical surface of the double-headed wedge-shaped clamp spring (4), wherein the length of the second groove (42) is greater than the length of the first groove (41).

5. The adjustable pipeline fixing device according to claim 4, characterized in that: The through rod (12) is arranged along the radial direction of the circular arc seat (11), and the circular arc seat (11) and the two mounting plates (13) are arranged symmetrically about the axis of the through rod (12).

6. The adjustable pipeline fixing device according to claim 4, characterized in that: The tensioning mechanism is a locking nut (15), the tensioning screw (14) is movably inserted into the mounting plate (13), and two ends of the tensioning screw (14) are respectively connected to the locking nut (15) and the band (2).

7. The adjustable pipeline fixing device according to claim 4, characterized in that: The mounting plate (13) is provided with a waist-shaped hole (131), the length direction of the waist-shaped hole (131) is arranged parallel to the axial direction of the arc seat (11), and the tensioning screw (14) is inserted into the waist-shaped hole (131).

8. The adjustable pipeline fixing device according to claim 4, characterized in that: A connecting pin (141) is arranged on the tensioning screw (14), the axis of the connecting pin (141) is arranged parallel to the axis of the arc seat (11), and a third groove (142) for clamping the band (2) is provided on the outer wall surface of the connecting pin (141), and the width of the third groove (142) is greater than the width of the band (2).

9. The adjustable pipeline fixing device according to claim 1, characterized in that: The mounting support (1) further comprises an open clamping ring (16).

10. An aircraft engine, characterized in that: The invention comprises the adjustable pipeline fixing device according to any one of claims 1 to 9.

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