A high-pressure bearing multidirectional displacement and deviation compensation device

Abstract

The application discloses a high-pressure multidirectional displacement and deviation compensation device, which comprises a bellows and a metal mesh sleeve; both ends of the bellows are provided with end welding rings, the end of the bellows is sleeved with an end pressing ring, a pressing ring is arranged at the wave trough of the middle part of the bellows, the middle part of the metal mesh sleeve is sleeved on the bellows and the end pressing ring, the end of the metal mesh sleeve extends to the end welding ring, each pressing ring is located between the metal mesh sleeve and the bellows, and the end welding ring, the end pressing ring and the metal mesh sleeve are connected; the adjacent pressing rings have a first assembly gap at the wave crest position of the bellows, and the metal mesh sleeve and each pressing ring have a second assembly gap, and the high-pressure multidirectional displacement and deviation compensation device is used for the high-pressure gas-liquid medium conveying of power equipment such as a liquid rocket engine, a gas turbine and an aero-engine and has the functions of swing displacement compensation and multidirectional assembly deviation compensation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of pump pressure type engine design and manufacture, such as liquid rocket engine, gas turbine and aero-engine, for realizing high pressure fluid delivery, swing displacement compensation and multi-direction assembly deviation compensation, and relates to a high pressure multi-direction displacement and deviation compensation device. BACKGROUND

[0002] The high pressure flexible connection pipeline device belongs to the field of metal expansion joint and hose manufacturing, for realizing large flow gas-liquid fluid delivery and compensating swing displacement and assembly deviation of two end connection devices, and is widely used in the fields of liquid rocket engine, steam turbine, gas turbine, aero-engine, heavy petrochemical equipment, heavy load vehicle and large ship.

[0003] The standard JB-T 6171-2013 mentions that the angular type universal expansion joint has the functions of absorbing angular displacement in any plane and bearing internal pressure, but under the conditions of high pressure and large axial size, the current bearing capacity, deformation compensation and assembly deviation compensation capacity are limited. In addition, most large diameter bellows have no pressure ring structure or limited bearing capacity of the pressure ring structure, resulting in insufficient strength and bearing capacity of the expansion joint. Even if the traditional metal mesh sleeve structure is used for bearing, the metal mesh sleeve is subjected to radial and axial separated loads, which makes the metal mesh sleeve bear poor stress and easily crack and break, thereby causing the risk of instability and damage of the expansion joint. Furthermore, most of the current compensators are not designed with radial and circumferential compensation structures at both ends, resulting in torsional deformation and sealing failure of the hose after assembly. The above problems cannot reliably guarantee that the hose has high pressure bearing, swing displacement compensation and multi-direction assembly deviation and deformation compensation performance. SUMMARY

[0004] The present application aims to overcome the above-mentioned shortcomings of the prior art and provides a high pressure multi-direction displacement and deviation compensation device, which has medium delivery and swing deformation, radial and circumferential assembly compensation functions.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] In one aspect, the present application provides a high pressure multi-direction displacement and deviation compensation device, which comprises a bellows and a metal mesh sleeve.

[0007] Both ends of the bellows are provided with end welding rings, the end of the bellows is sleeved with an end pressure ring, the valleys of the middle part of the bellows are provided with pressure rings, the middle part of the metal mesh sleeve is sleeved on the bellows and the end pressure ring, the end of the metal mesh sleeve extends to the end welding ring, each pressure ring is located between the metal mesh sleeve and the bellows, and the end welding ring, the end pressure ring and the metal mesh sleeve are connected.

[0008] The adjacent pressing rings have a first assembly gap at the wave crest position of the bellows, and the metal mesh sleeve has a second assembly gap between each pressing ring.

[0009] The high-pressure bearing multidirectional compensation swing device further improves in that:

[0010] The end welding ring is provided with a spherical sealing structure away from the bellows.

[0011] The spherical sealing structure is sleeved with a loose flange.

[0012] A third assembly gap is arranged between the loose flange and the spherical sealing structure.

[0013] The spherical sealing structure is sleeved with a rubber O-ring.

[0014] The end pressing ring is provided with an annular groove at the joint position of the end welding ring, and the end of the metal mesh sleeve extends to the inner wall surface of the annular groove.

[0015] The metal mesh sleeve is sleeved with a welding lining ring, wherein the welding lining ring is located in the annular groove, and the end welding ring, the welding lining ring, the end pressing ring and the metal mesh sleeve are connected.

[0016] The end welding ring, the welding lining ring, the end pressing ring and the metal mesh sleeve are welded to form a welded structure.

[0017] The bellows is a multi-layer U-shaped bellows.

[0018] The metal mesh sleeve is crimped between the end welding ring, the welding lining ring and the end pressing ring.

[0019] The present application has the following beneficial effects:

[0020] The high-pressure bearing multidirectional displacement and deviation compensation device effectively improves the pressure-bearing capacity and anti-instability capacity of the bellows, and the adjacent pressing rings have a first assembly gap at the wave crest position of the bellows, and the metal mesh sleeve has a second assembly gap between each pressing ring, effectively controlling the overall uniform deformation of the bellows and preventing local large deformation and instability, thereby increasing the working pressure to more than 30Ma and the length to more than 300mm under the condition that the drift diameter is greater than 100mm, solving the problems of large axial size and insufficient high-pressure compensation and swing capacity of the existing metal bellows / expansion joint structure, and having the compensation functions of medium conveying and swing deformation, radial and circumferential assembly.

[0021] In addition, the application changes the traditional metal hose metal mesh cover which simultaneously bears the radial load and axial load, and solves the problems of poor stress and insufficient structural strength, i.e. the radial load is borne by the end head compression ring and the compression ring, the axial separation load is borne by the structure formed by the metal mesh cover, the end head welding ring and the end head compression ring, the end head welding ring, the end head compression ring and the metal mesh cover are connected, the problems of poor stress and insufficient reliability of the traditional metal hose gold mesh cover which simultaneously bears the radial load and axial separation load are solved, and the metal mesh cover has high bearing capacity and working safety.

[0022] Further, the metal mesh cover is integrally fused and welded at both ends of the end head, the end head welding ring, the welding liner and the end head compression ring, the welding liner is provided with a groove structure, the end head of the fused and welded structure is connected integrally, the fused and welded area is expanded, the problems of reduced welding strength and deformation stress concentration of the traditional metal hose at the end of the metal mesh cover are improved, and the structural strength of both ends of the metal mesh cover is increased.

[0023] Further, the application is provided with a spherical sealing structure, a live loop flange and a rubber O-ring, and can simultaneously realize radial and circumferential assembly deviation compensation of the inlet end and the outlet end. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings accompanying the specification of the application form a part of the application and serve to further understand the application. The illustrative embodiments of the application and their description serve to explain the application without forming an improper limitation of the application. In the drawings:

[0025] Figure 1 It is a sectional view of the application;

[0026] Figure 2 It is a structural view of the application;

[0027] Figure 3 It is a position view of the welding liner;

[0028] Figure 4 It is a structural view of the spherical sealing structure;

[0029] Figure 5 It is a position view of the second assembly gap and the first assembly gap;

[0030] Figure 6 It is a stress diagram of the application.

[0031] In the drawings, 1 is a spherical sealing structure, 2 is a live loop flange, 3 is an end head welding ring, 4 is a welding liner, 5 is an end head compression ring, 6 is a compression ring, 7 is a corrugated pipe, 8 is a metal mesh cover, 9 is a rubber O-ring, 11 is a welding structure, 12 is a bevel welding, 13 is a third assembly gap, 14 is a spherical structure, 15 is a second assembly gap, and 16 is a first assembly gap. DETAILED DESCRIPTION

[0032] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should belong to the protection scope of the present application.

[0033] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0034] The present application will be described in further detail below in conjunction with the drawings:

[0035] Reference Figure 1 and Figure 2 The high-pressure bearing multidirectional displacement and deviation compensation device described in the present application includes a spherical sealing structure 1, a live flange 2, an end welding ring 3, a welding lining ring 4, an end pressing ring 5, a pressing ring 6, a bellows 7, a metal mesh sleeve 8 and a rubber O-ring 9.

[0036] Both ends of the bellows 7 are provided with the spherical sealing structure 1 and the end welding ring 3, and the end welding ring 3 is located between the bellows 7 and the spherical sealing structure 1. The end of the bellows 7 is sleeved with the end pressing ring 5, and the wave trough of the middle part of the bellows 7 is provided with the pressing ring 6. Among them, the adjacent pressing rings 6 have a first assembly gap 16 at the wave crest position of the bellows 7. There is a gap between the outermost pressing ring 6 and the end pressing ring 5 at the outermost wave crest position of the bellows 7. The pressing ring 6 is a U-shaped pressing ring.

[0037] An annular groove is arranged at the joint position of the end pressing ring 5 and the end welding ring 3. The middle part of the metal mesh sleeve 8 is sleeved on the bellows 7, and the end of the metal mesh sleeve 8 covers the inner wall surface of the annular groove.

[0038] In the embodiment, each pressing ring 6 and the end pressing ring 5 are located between the metal mesh sleeve 8 and the bellows 7, and there is a second assembly gap 15 between the metal mesh sleeve 8 and each pressing ring 6.

[0039] In the embodiment, the metal mesh sleeve 8 is sleeved with the welding backing ring 4, wherein the welding backing ring 4 is located in the annular groove.

[0040] In the embodiment, the spherical sealing structure 1 is welded with the end welding ring 3, the end welding ring 3, the welding backing ring 4, the end pressing ring 5 and the metal mesh sleeve 8 are welded to form a welding structure 11.

[0041] In the embodiment, the spherical sealing structure 1 is sleeved with the loose flange 2 and the rubber O-ring 9, wherein the third assembly gap 13 is arranged between the loose flange 2 and the spherical sealing structure 1.

[0042] Reference Figure 1 , Figure 5 and Figure 6 In the present application, the end pressing ring 5 and the pressing ring 6 have sufficient strength and rigidity for bearing all the radial loads formed by the gas-liquid internal pressure of the bellows 7 in operation, the pressing ring 6 is tightly attached to the bellows 7 at the wave trough and the straight section of the bellows 7 to improve the pressure-bearing capacity of the bellows 7, and the gradually increasing gap structure is adopted at the wave trough position to improve the load-bearing capacity of the bellows 7 at the wave peak position and have the deformation compensation capacity; the first assembly gap 16 is arranged between the metal mesh sleeve 8 and the pressing ring 6 and the bellows 7, so that the metal mesh sleeve 8 ensures not to bear the radial load of the bellows 7, but only bears the axial separation load, thereby improving the load state of the metal mesh sleeve 8 compared with the traditional metal hose, and improving the working safety and reliability of the metal mesh sleeve 8.

[0043] Reference Figure 1 and Figure 3 The metal mesh sleeve 8, the spherical sealing structure 1, the end welding ring 3, the welding backing ring 4 and the end pressing ring 5 form an integrated welding structure 11, wherein the metal mesh sleeve 8 is pressed between the end welding ring 3, the welding backing ring 4 and the end pressing ring 5, and the welding backing ring 4 can effectively inhibit the bending deformation of the metal mesh sleeve 8, thereby effectively avoiding the damage hidden danger caused. At the same time, the end welding ring 3 and the welding backing ring 4 are firstly welded with the metal mesh sleeve 8 at the welding position by 141I quality, to ensure the effective fusion depth and welding quality of the three; in addition, the fusion area of the three is further increased by bevel welding 12 at the welding position, which improves the problem of reduced welding strength and deformation stress concentration at the end of the metal mesh sleeve of the traditional metal hose, to improve the strength of the welding position.

[0044] Reference Figure 1 and Figure 5The corrugated pipe 7 comprises circular arc segments at both ends and a straight line segment in the middle to form a plurality of wave nodes, and the wave node is composed of a circular arc type wave trough, a straight line segment and a circular arc type wave crest connected in sequence; the cross section of the compression ring 6 comprises a matching area, a compensation segment and a positioning area, the matching area matches the circular arc type wave trough and the straight line transition segment of the corrugated pipe 7, the wave crest of the corrugated pipe 7 and the outer side of the compression ring 6 are provided with a growth type gap, i.e. a first assembly gap 16, for gap compensation in the swinging process and gradual increase type matching of the wave crest and the concave surface of the compression ring 6, realizing deformation compensation of the corrugated pipe 7 and load protection, preventing excessive deformation and instability damage of the wave crest position of the corrugated pipe 7.

[0045] Reference Figure 4 The present application is provided with a spherical sealing structure 1, when there is a radial angle between the connected part and the hose during the assembly of the swinging device, the spherical structure 14 on the spherical sealing structure 1 can realize deformation deviation compensation by adjusting the angle; the present application is provided with a live sleeve flange 2, when there is a circumferential position deviation during the assembly, the live sleeve flange 2 can effectively compensate the circumferential deviation.

[0046] For the turbine driven power equipment which needs to generate swing at both ends, the present application is arranged on the pipeline connecting the fixed part and the swinging part, and the pipelines at both ends can be connected by the concave-convex spherical flange.

[0047] The contents not described in detail in the specification of the present application belong to the industry known technology of the turbine driven engine, expansion joint and other mechanical equipment field.

[0048] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application and not to limit it, although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that: the specific embodiments of the present application can be modified or replaced by the same, without departing from the spirit and scope of the present application, any modification or equivalent replacement, which should be covered in the protection scope of the claims of the present application.

Claims

1. A high pressure bearing multidirectional displacement and misalignment compensation device, characterized by, The corrugated pipe (7) and the metal mesh sleeve (8) are included. End welding rings (3) are arranged at both ends of the corrugated pipe (7), end pressing rings (5) are sleeved on the end portions of the corrugated pipe (7), pressing rings (6) are arranged at the wave troughs of the middle portions of the corrugated pipe (7), the middle portion of the metal mesh sleeve (8) is sleeved on the corrugated pipe (7) and the end pressing rings (5), the end portion of the metal mesh sleeve (8) extends to the end welding rings (3), each pressing ring (6) is located between the metal mesh sleeve (8) and the corrugated pipe (7), and the end welding rings (3), the end pressing rings (5) and the metal mesh sleeve (8) are connected. First assembly gaps (16) are arranged at the wave crest positions of the corrugated pipe (7) between adjacent pressing rings (6), and second assembly gaps (15) are arranged between the metal mesh sleeve (8) and each pressing ring (6). Annular grooves are arranged at the connecting positions of the end pressing rings (5) and the end welding rings (3), and the end portion of the metal mesh sleeve (8) extends to the inner wall surface of the annular grooves. Welding lining rings (4) are sleeved on the metal mesh sleeve (8), wherein the welding lining rings (4) are located in the annular grooves, and the end welding rings (3), the welding lining rings (4), the end pressing rings (5) and the metal mesh sleeve (8) are connected.

2. The high pressure bearing multi-direction displacement and deviation compensation device according to claim 1, characterized in that, Spherical sealing structures (1) are arranged at the ends of the end welding rings (3) away from the corrugated pipe (7).

3. The high pressure bearing multi-direction displacement and deviation compensation device according to claim 2, characterized in that, Sleeve flanges (2) are sleeved on the spherical sealing structures (1).

4. The high pressure bearing multi-direction displacement and deviation compensation device according to claim 3, characterized in that, Third assembly gaps (13) are arranged between the sleeve flanges (2) and the spherical sealing structures (1).

5. The high pressure bearing multi-direction displacement and deviation compensation device according to claim 2, characterized in that, Rubber O-rings (9) are sleeved on the spherical sealing structures (1).

6. The high pressure bearing multi-directional displacement and misalignment compensation device of claim 1, wherein, The end welding rings (3), the welding lining rings (4), the end pressing rings (5) and the metal mesh sleeve (8) are welded to form welding structures (11).

7. The high pressure bearing multi-directional displacement and misalignment compensation device of claim 1, wherein, The corrugated pipe (7) is a multi-layer U-shaped corrugated pipe.

8. The high pressure bearing multi-directional displacement and misalignment compensation device of claim 1, wherein, The metal mesh sleeve (8) is press-connected between the end welding rings (3), the welding lining rings (4) and the end pressing rings (5).

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