CN109237190B

CN109237190B - External pipeline connecting structure of engine with vibration reduction function

Info

Publication number: CN109237190B
Application number: CN201810981677.6A
Authority: CN
Inventors: 徐鑫; 姚明舟; 高松
Original assignee: AECC Shenyang Engine Research Institute
Current assignee: AECC Shenyang Engine Research Institute
Priority date: 2018-08-27
Filing date: 2018-08-27
Publication date: 2020-09-18
Anticipated expiration: 2038-08-27
Also published as: CN109237190A

Abstract

The application belongs to the field of engine external pipeline structural design, in particular to engine external pipeline connecting structure with a vibration reduction function, comprising: pipeline connecting device, two first casings that are tubular structure and two second casings that are tubular structure, first casing and second casing constitute the two-stage damping of applying for the structure, can effectively solve the big problem of engine pipeline sudden vibration, especially under specific environment such as engine platform frame test run or fly to match, can't add the pipeline damping structure or increase the pipeline vibration problem of the proruption under the circumstances such as pipeline support because of spatial structure, casing structure are limited.

Description

External pipeline connecting structure of engine with vibration reduction function

Technical Field

The application belongs to the field of structural design of external pipelines of engines, and particularly relates to an external pipeline connecting structure of an engine with a vibration reduction function.

Background

The problems of loose connection, sealing failure, oil leakage and service life reduction of pipelines can be caused by the problems of pipeline vibration caused by the phenomena of equipment holes, fluid pressure pulsation, friction or leakage and the like of external pipelines of engines such as aero-engines, gas turbines and the like. Generally, the method for reducing the vibration of the pipeline is to add a pipeline damping structure or a positive price pipeline bracket to improve the supporting rigidity.

In the design process of an external pipeline, vibration calculation is complex, the situation of excessive vibration is difficult to find in the design process, the problem of excessive vibration is exposed only in specific environments such as engine bench test run or flying matching and the like, the problem is limited by a space structure and a casing structure, the pipeline damping structure is difficult to be additionally arranged or a pipeline support is locally added, sometimes, the surface structure or the mounting edge structure of the casing needs to be changed, and the cost is extremely high. The method of adding the pipeline bracket can generate coupling to the peripheral pipeline, so that the vibration source is diffused.

Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.

Disclosure of Invention

The application aims at providing an engine external pipeline connecting structure with a vibration reduction function, and aims to solve the problem that sudden vibration of an engine pipeline is large, especially the problem that sudden pipeline vibration cannot be caused under the conditions that a pipeline damping structure or a pipeline support is increased due to the limitation of a space structure and a casing structure under specific environments such as engine bench test run or flying matching.

The technical scheme of the application is as follows:

the application is an engine external pipeline connection structure of area damping function, includes:

the pipeline connecting device comprises a first pipe body, a second pipe body and a third pipe body which are coaxially communicated in sequence, wherein the diameter of the first pipe body is the same as that of the third pipe body, the diameter of the second pipe body is larger than that of the first pipe body, and a first through hole and a second through hole which are radially symmetrical with the axis of the second pipe body are formed in the middle of the second pipe body;

the first shell is coaxially sleeved on the first pipe body and the third pipe body respectively and connected to two axial ends of the second pipe body, an annular cavity is formed between the first shell and the third pipe body respectively, a corrugated spring is coaxially arranged in the annular cavity, one axial end of the corrugated spring is contacted with two axial ends of the second pipe body respectively, and the other axial end of the corrugated spring is contacted with the inner wall of the corresponding annular end cover of the first shell;

two second casings that are tubular structure, axial one end is sealed, two the second casing respectively with first through-hole or the coaxial intercommunication of second through-hole install the spring assembly in the second casing, spring assembly one end with the blind end contact of second casing, the other end is connected with the piston.

Optionally, the pipe connection is one integral piece.

Optionally, the first housing is connected to the two axial ends of the second pipe body by bolts.

Optionally, the number of bolts includes at least two.

Optionally, a limiting pressure plate is installed between the corrugated spring and the first casing, and the two limiting pressure plates are respectively coaxially sleeved on the first pipe body and the third pipe body.

Optionally, a third through hole is axially formed in the annular end cover of the first shell, and an internal thread is formed in the third through hole and adapted to the limiting jackscrew.

Optionally, the number of the third through holes formed in a single first shell is four, and four limiting jackscrews are correspondingly arranged.

Optionally, the limit jackscrew is connected in the third through hole through a thread and tightly props the limit pressing plate.

Optionally, the piston is a clearance fit with the second housing.

Optionally, a piston ring is coaxially sleeved on the outer wall of the piston, and the piston ring limits the piston to be separated from the second shell.

The application has at least the following beneficial technical effects:

the utility model provides a take outside pipeline connection structure of engine of damping function can effectively solve the big problem of the unexpected vibration of engine pipeline when promoting pipeline antivibration design ability, especially under specific environment such as engine bench test run or fly to match, can't add the pipeline damping structure or increase the pipeline vibration problem of the proruption under the circumstances such as pipeline support because of space structure, machine casket structure are limited.

Drawings

FIG. 1 is a cross-sectional view of the present application;

FIG. 2 is an exploded view of the present application;

FIG. 3 is a schematic view of the mounting assembly of the first housing of the present application;

FIG. 4 is a schematic view of the mounting assembly of the second housing of the present application;

wherein:

1-pipeline connecting device, 2-first shell, 3-second shell, 4-ripple spring, 5-spring set, 6-piston, 7-piston ring, 8-limit pressure plate, 9-limit jackscrew and 10-bolt.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.

The present application is described in further detail below with reference to fig. 1-4.

Fig. 1 and 2 show an external pipe connection structure with vibration damping function for an engine, including:

the pipeline connecting device 1 comprises a first pipe body, a second pipe body and a third pipe body which are coaxially communicated in sequence, wherein the diameter of the first pipe body is the same as that of the third pipe body, the diameter of the second pipe body is larger than that of the first pipe body, and a first through hole and a second through hole which are radially symmetrical with the axis of the second pipe body are formed in the middle of the second pipe body;

the two first shells 2 are of tubular structures, one axial end of each first shell 2 is provided with an annular end cover, the two first shells 2 are respectively coaxially sleeved on the first pipe body and the third pipe body and are connected to the two axial ends of the second pipe body, an annular cavity is formed between each first shell 2 and the first pipe body and between each first shell 2 and the third pipe body, a corrugated spring 4 is coaxially arranged in each annular cavity, one axial end of each corrugated spring 4 is respectively contacted with the two axial ends of the second pipe body, and the other axial end of each corrugated spring is contacted with the inner wall of the corresponding annular end cover of the first shell 2; as shown in fig. 1, in the present embodiment, two first housings 2 are connected to both ends of a second pipe body by bolts;

taking the first shell 2 on the left side in fig. 1 as an example, a corrugated spring 4 is installed in the first shell 2, a limit pressing plate 8 is arranged between the left side of the corrugated spring 4 and the inner side of an annular end cover of the first shell 2, four third through holes are formed in the axial direction of the annular end cover, an internal thread is formed on each third through hole, and a limit jackscrew 9 in threaded connection is installed, in this embodiment, the number of bolts for connecting the first shell 2 on the left side with the left side of the second tube body is at least two, and the bolts are uniformly arranged to ensure the stability of the connection, the corrugated spring 4 at least ensures that two sides are in contact with the limit pressing plate 8 or the left side of the second tube body, it can be understood that at least three limit jackscrews 9 are arranged to ensure that the limit jackscrews 9 are screwed in to the right side and then keep the limit pressing plate 8 in a stable plane, so that the corrugated spring 4 is in a, four have been arranged to spacing jackscrew, and spacing jackscrew 9 can be adjusted according to the size of vibration, and when fluid process pipe connection device 1, through screwing up spacing jackscrew 9, make the left side of ripple spring 4 extrusion second body, can reach the effect that reduces the vibration, adjusts spacing jackscrew 9 according to fluidic velocity of flow and vibration condition, realizes the control to the vibration degree.

The structural installation of the first housing 2 on the right in fig. 1 and its effectiveness correspond to the first housing 2 on the left.

As shown in fig. 1 or fig. 4, one axial end of each of the two second housings 3 is closed, the two second housings 3 are coaxially communicated with the first through hole or the second through hole, respectively, a spring assembly 5 is installed in each of the second housings 3, one end of each of the spring assemblies 5 is in contact with the closed end of each of the second housings 3, and the other end of each of the spring assemblies is connected with a piston 6.

In this embodiment, taking the second housing 3 at the top in fig. 1 as an example, the piston 6 and the second housing 3 are in clearance fit, a piston ring 7 is coaxially sleeved on the outer wall of the piston 6, and the piston ring 7 limits the piston 6 to be separated from the second housing 3; when fluid passes through the pipeline connecting device 1, the fluid can generate pulse or impact, in the embodiment, the fluid can enter the first through hole or the second through hole to push the piston 6 to move outwards to press the spring set 5, the spring set 5 is compressed to store energy, when the fluid tends to be stable, the force acting on the piston 6 is reduced, the spring set 5 can release energy to extend, so that the fluid is discharged out of the first through hole or the second through hole, the compression and extension of the spring set 5 and the reciprocating motion of the piston 6 can play roles in buffering and absorbing the fluid impact and the pulse, and the pipeline connecting device 1 also has the capacity of damping the pipeline connecting device 1.

Preferably, the pipe connection device 1 is a single piece, making the performance of the structure more stable.

In this embodiment, first casing 2 and second casing 3 and the spring assembly inside thereof of this application for the structure of this application has the function of two-stage damping, can effectively solve the big problem of engine pipeline sudden vibration, especially under specific environment such as engine pedestal trial run or the matching of flying out, can't add the pipeline damping structure or increase the pipeline vibration problem of the proruption under the circumstances such as pipeline support because of space structure, casing structure are limited.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a take outside pipeline connection structure of engine of damping function which characterized in that includes:

the pipeline connecting device (1) comprises a first pipe body, a second pipe body and a third pipe body which are coaxially communicated in sequence, the diameter of the first pipe body is the same as that of the third pipe body, the diameter of the second pipe body is larger than that of the first pipe body, and a first through hole and a second through hole which are radially symmetrical with the axis of the second pipe body are formed in the middle of the second pipe body;

the two first shells (2) are of tubular structures, one axial end of each first shell (2) is provided with an annular end cover, the two first shells (2) are respectively coaxially sleeved on the first pipe body and the third pipe body and are connected to the two axial ends of the second pipe body, an annular cavity is formed between each first shell (2) and the corresponding first pipe body and between each first shell and the corresponding third pipe body, a corrugated spring (4) is coaxially arranged in each annular cavity, one axial end of each corrugated spring (4) is respectively contacted with the two axial ends of the corresponding second pipe body, and the other axial end of each corrugated spring is contacted with the corresponding inner wall of the annular end cover of the corresponding first shell (2);

two second casings (3) that are tubular structure, axial one end is sealed, two second casing (3) respectively with first through-hole or the coaxial intercommunication of second through-hole install spring assembly (5) in second casing (3), spring assembly (5) one end with the blind end contact of second casing (3), the other end is connected with piston (6).

2. The engine external pipe connection structure with vibration damping function according to claim 1, characterized in that said pipe connection device (1) is one integral piece.

3. The connection structure of the external pipeline of the engine with the vibration damping function according to claim 1, wherein the first housing (2) is connected with both ends of the second pipe body in the axial direction by bolts.

4. The engine external pipe connection structure with a vibration damping function according to claim 3, wherein the number of bolts includes at least two.

5. The connection structure of the external pipeline of the engine with the vibration damping function according to claim 1, wherein a limiting pressure plate (8) is installed between the corrugated spring (4) and the first shell (2), and the two limiting pressure plates (8) are respectively coaxially sleeved on the first pipe body and the third pipe body.

6. The connection structure of the external pipeline of the engine with the vibration damping function according to claim 1, wherein a third through hole is axially formed in the annular end cover of the first shell (2), and the third through hole is provided with internal threads and is adapted to a limiting jackscrew (9).

7. The connection structure of the external pipeline of the engine with the vibration damping function according to claim 6, wherein the number of the third through holes formed in a single first shell (2) is four, and four limiting jackscrews (9) are correspondingly arranged.

8. The connection structure of the external pipeline of the engine with the vibration damping function according to claim 6 or 7, wherein the limit jackscrew (9) is connected in the third through hole through a thread and tightly props against the limit pressure plate (8).

9. The connection structure of an engine external pipe with vibration damping function according to claim 1, characterized in that the piston (6) and the second housing (3) are in clearance fit.

10. The connection structure of the external pipeline of the engine with the vibration damping function according to claim 1, characterized in that a piston ring (7) is coaxially sleeved on the outer wall of the piston (6), and the piston ring (7) limits the piston (6) from being separated from the second shell (3).