Compensation and vibration isolation connecting structure of airplane pipeline system

Abstract

The utility model relates to the technical field of pipeline compensation, and discloses a compensation and vibration isolation connecting structure of an airplane pipeline system, which comprises a shell, a corrugated pipe is arranged on one side in the shell, the corrugated pipe is in contact with the side wall in the shell for limiting, a pipe orifice of the corrugated pipe penetrates through one side of the shell, and the other side of the shell is provided with a connecting rod. A universal joint base is fixedly installed on the side, located in the shell, of the corrugated pipe, and a universal joint pipe is arranged on the universal joint base in a penetrating mode. According to the utility model, a highly integrated omnibearing compensation structure can satisfy uniaxial compensation or uniangular compensation, can satisfy angular coupling axial compensation, can isolate vibration, can save the space of a pipeline system, improves the safety and reliability of a pipeline, further improves the safety of an aero-engine and an aircraft, and improves the reliability of the aero-engine and the aircraft. The problems that an existing compensation structure is single in compensation function, limited in application range and complex in structure are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline compensation, in particular to a compensation and vibration isolation connection structure for an aircraft pipeline system. Background Technique

[0002] The aeroengine and the aircraft pipeline system have complex paths and harsh working conditions. The manufacturing tolerances, assembly, stress and heat deformation, vibration, etc. of the pipelines will all affect their safety. Therefore, a certain compensation structure is required between the pipelines to compensate for deformation and isolate vibration, so as to improve the safety and service life of the pipeline components.

[0003] Common compensation structures: 1. Bellows, which is mainly used to compensate for pipeline deformation, but it has no limit position, is prone to excessive deformation damage, and its own stability is poor and it is easy to lose stability, as Figure 3 shown; 2. Ball joints, such as the patent CN203703442U, as Figure 4 shown, which is mainly used to compensate for the angular deformation of the pipeline. However, the deformation of the pipeline system is complex, and angular and axial deformations will exist simultaneously. A single ball joint cannot meet the compensation requirements, and the structure is complex and difficult to process; 3. Multi-directional compensators, the structures for axial and radial compensation are as described in the structures of the patents CN205001706U and CN 211010308 U, as Figure 5 shown, which can meet axial and angular compensation, but the use environment is limited by the sealing ring and vibration cannot be isolated.

[0004] The above structures cannot simultaneously meet the requirements of pipeline system compensation and vibration isolation. It is impossible to arrange multiple structures simultaneously in the limited space of the engine and the aircraft. Therefore, a structure that can simultaneously meet axial and angular compensation and isolate vibration is needed to solve the above problems, especially for high-temperature and high-pressure pipelines. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problems existing in the prior art, and to propose a compensation and vibration isolation connection structure for an aircraft pipeline system.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A compensation and vibration isolation connection structure for an aircraft pipeline system, comprising a housing. Inside one side of the housing, there is a bellows, and the bellows is in contact and limited with the inner side wall of the housing. The pipe orifice of the bellows penetrates through one side of the housing. On one side of the bellows inside the housing, there is a universal joint base fixedly installed. A universal joint pipe penetrates through the universal joint base. One side of the universal joint pipe is spherical, fitting with the universal joint base to form a sealing surface and a revolute pair, and this side is communicated with the inner cavity of the bellows. On the other side of the housing, there is an opening. The other end of the universal joint pipe movably penetrates through the opening, and the inner diameter of the opening is larger than the outer diameter of this end of the universal joint pipe. The universal joint base is connected to the other side inside the housing through an elastic structure.

[0008] Preferably, the outer periphery of the bellows is in movable contact with the inner periphery of the housing in the vertical direction, and the side part of the bellows is in pressing contact with the inner side wall of the housing.

[0009] Preferably, the outer periphery of the bellows is in movable contact with the inner periphery of the housing in the vertical direction, and the side part of the bellows is fixedly connected to the inner side wall of the housing by welding or bonding.

[0010] Preferably, the corrugated structure of the bellows is U-shaped, V-shaped or Ω-shaped.

[0011] Preferably, a cover plate is screwed to the side of the housing away from the bellows, and the opening is formed on the cover plate.

[0012] Preferably, the elastic structure includes a spring connected to the inner side of the cover plate, and the other end of the spring is fixedly connected to the universal joint base.

[0013] Preferably, the universal joint base and the bellows are fixed and sealed by bonding or welding.

[0014] Preferably, the outer diameter of the end of the universal joint pipe communicating with the bellows is smaller than the inner diameter of the hole body of the bellows on this side.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] The highly integrated all-round compensation structure of the present utility model can meet single-axial compensation or single-angular compensation, and can also simultaneously meet angular-coupled axial compensation, and can isolate vibration. It can save the space of the pipeline system, improve the safety and reliability of the pipeline, further improve the safety of aero-engines and aircraft, and solve the problems of single compensation function, limited application range and complex structure of the existing compensation structure. [[ID=…]] Description of the Drawings

[0017] Figure 1 Schematic diagram of a compensation and vibration isolation connection structure for an aircraft pipeline system proposed by the present utility model;

[0018] Figure 2 Schematic diagram of the compensation orientation of a compensation and vibration isolation connection structure for an aircraft pipeline system proposed by the present utility model;

[0019] Figure 3 Schematic diagram of an existing corrugated pipe;

[0020] Figure 4 Schematic diagram of an existing spherical joint;

[0021] Figure 5 Schematic diagram of an existing multi-directional compensator.

[0022] In the figure: 1, corrugated pipe; 21, housing; 22, cover plate; 31, first universal joint base; 32, second universal joint base; 4, elastic structure; 5, universal joint pipe. Specific implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0024] Referring to Figure 1 and Figure 2 , a compensation and vibration isolation connection structure for an aircraft pipeline system includes a housing 21. On one side inside the housing 21, a corrugated pipe 1 is provided, and the corrugated pipe 1 is in contact and limited with the inner side wall of the housing 21. The corrugated pipe 1 is an elastic component that can undergo elastic deformation. In this structure, its axial tensile and compressive deformation characteristics are applied. The pipe orifice of the corrugated pipe 1 penetrates through one side of the housing 21. On one side of the corrugated pipe 1 located inside the housing 21, a universal joint base is fixedly installed. A universal joint pipe 5 penetrates through the universal joint base. One side of the universal joint pipe 5 is spherical and fits with the universal joint base to form a sealing surface and a revolute pair (that is, the cavity of the universal joint base that accommodates the universal joint pipe 5 is also spherical), and this side is communicated with the inner cavity of the corrugated pipe 1. The universal joint base can be designed in two parts, namely a first universal joint base 31 and a second universal joint base 32. The first universal joint base 31 and the second universal joint base 32 respectively pass through both sides of the universal joint pipe 5 and are combined together to complete the connection outside the spherical part of the universal joint pipe 5. The connection method can be bolt connection. This method facilitates the disassembly and assembly of the universal joint pipe 5. At the same time, according to the actual working conditions, the contact surface between the universal joint base and the universal joint pipe 5 can be designed with various structures such as a metal coating, a graphite ring structure, and a composite material structure. On the other side of the housing 21, there is an opening. The other end of the universal joint pipe 5 movably penetrates through the opening, and the inner diameter of the opening is larger than the outer diameter of this end of the universal joint pipe 5. The universal joint base is connected to the other side inside the housing 21 through an elastic structure 4.

[0025] This structure is connected to the pipeline system through the two end interfaces (i.e., the left end of the corrugated pipe 1 and the right end of the universal joint pipe 5). During operation, axial compensation is provided through the axial elastic deformation ability of the corrugated pipe 1. The universal joint pipe 5 can rotate in the universal joint base, providing angular compensation. The elastic structure 4 provides a pressing force, cooperating with the corrugated pipe 1. The elastic characteristics of both can isolate vibrations in the pipeline system. Compared with the prior art, this structure highly integrates an all-round compensation structure, which can meet single-axial compensation or single-angular compensation, and can also simultaneously meet angular-coupled axial compensation, and can isolate vibrations. It can save space in the pipeline system, improve the safety and reliability of the pipeline, further enhance the safety of aero-engines and aircraft, and solve the problems of single compensation function, limited application range, and complex structure of the existing compensation structure.

[0026] In this embodiment, the outer periphery of the corrugated pipe 1 is in movable contact with the inner periphery of the housing 21 in the vertical direction, and the side portion of the corrugated pipe 1 is in pressing contact with the inner side wall of the housing 21.

[0027] In another embodiment, the outer periphery of the corrugated pipe 1 is in movable contact with the inner periphery of the housing 21 in the vertical direction, and the side portion of the corrugated pipe 1 is fixedly connected to the inner side wall of the housing 21 by welding or bonding.

[0028] In this embodiment, the corrugated structure of the corrugated pipe 1 is U-shaped. In other embodiments, it can also be designed as V-shaped or Ω-shaped (not shown in the figure). Its diameter is designed according to the flow requirements of the pipeline system, and the number, height, wall thickness, stiffness, etc. of the corrugations are designed according to the compensation requirements of the pipeline system; the inner wall of the housing 21 can also be coated with performance coatings such as lubrication, wear resistance, and anti-adhesion according to the use environment.

[0029] In this embodiment, a cover plate 22 is screwed to the side of the housing 21 away from the corrugated pipe 1, and the opening is provided on the cover plate 22. By using a tool to screw the cover plate 22 into the housing 21, the pressing force can be controlled by controlling the torque to achieve axial stiffness adjustment.

[0030] In this embodiment, the elastic structure 4 includes a spring connected to the inner side of the cover plate 22, and the other end of the spring is fixedly connected to the universal joint base.

[0031] In this embodiment, the universal joint base and the corrugated pipe 1 are fixedly connected and sealed by bonding or welding.

[0032] In this embodiment, the outer diameter of the end of the universal joint pipe 5 connected to the corrugated pipe 1 is smaller than the inner diameter of the hole body of the corrugated pipe 1 on this side, facilitating the movement of the end of the universal joint pipe 5.

[0033] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A compensation and vibration isolation connection structure for an aircraft pipeline system, characterized in that: It includes a housing. On one side inside the housing, a corrugated pipe is provided, and the corrugated pipe is in contact and limited with the inner side wall of the housing. The pipe orifice of the corrugated pipe penetrates through one side of the housing. On one side of the corrugated pipe inside the housing, a universal joint base is fixedly installed. A universal joint pipe penetrates through the universal joint base. One side of the universal joint pipe is spherical, which fits with the universal joint base to form a sealing surface and a revolute pair, and this side is communicated with the inner cavity of the corrugated pipe. On the other side of the housing, there is an opening. The other end of the universal joint pipe movably penetrates through the opening, and the inner diameter of the opening is larger than the outer diameter of this end of the universal joint pipe. The universal joint base is connected to the other side inside the housing through an elastic structure.

2. The compensation and vibration isolation connection structure of an aircraft pipeline system according to claim 1, characterized in that: The outer periphery of the corrugated pipe is movably abutted against the inner periphery of the housing in the vertical direction, and the side part of the corrugated pipe is tightly in contact with the inner side wall of the housing.

3. The compensation and vibration isolation connection structure of an aircraft pipeline system according to claim 1, characterized in that: The outer periphery of the corrugated pipe is movably abutted against the inner periphery of the housing in the vertical direction, and the side part of the corrugated pipe is fixedly connected to the inner side wall of the housing by welding or bonding.

4. The compensation and vibration isolation connection structure of an aircraft pipeline system according to claim 1, characterized in that: The corrugated structure of the corrugated pipe is U-shaped, V-shaped or Ω-shaped.

5. The compensation and vibration isolation connection structure of an aircraft pipeline system according to claim 1, characterized in that: A cover plate is screwed to the side of the housing away from the corrugated pipe, and the opening is formed on the cover plate.

6. The compensation and vibration isolation connection structure of an aircraft pipeline system according to claim 5, characterized in that: The elastic structure includes a spring connected to the inner side of the cover plate, and the other end of the spring is fixedly connected to the universal joint base.

7. The compensation and vibration isolation connection structure of an aircraft pipeline system according to claim 1, characterized in that: The universal joint base and the corrugated pipe are fixed and sealed by bonding or welding.

8. The compensation and vibration isolation connection structure of an aircraft pipeline system according to claim 1, characterized in that: The outer diameter of the end of the universal joint pipe communicated with the corrugated pipe is smaller than the inner diameter of the hole body on this side of the corrugated pipe.

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