Independent rotating joint for connecting aero-engine hose

Abstract

The invention provides an independent rotating joint for connecting a hose of an aero-engine, and belongs to the technical field of joints. One end of the flat pipe nozzle is rotatably connected with the additional nut, the other end of the flat pipe nozzle is fixedly connected with a nut, and an inner hole of the nut is provided with an angle bearing inner ring; the nut is installed on the flat pipe nozzle, the rotating joint is installed on the flat pipe nozzle and is rotatably connected with the flat pipe nozzle, a bearing is arranged between the rotating joint and the nut, the bearing is arranged between an angle bearing inner ring of the nut and a bearing outer ring installed on the rotating joint, and the bearing outer ring is limited on the rotating joint through a check ring; and the sealing ring is arranged between the rotary joint and the flat pipe nozzle. The problem that the hose rotates by a large angle relative to the connecting end when the connecting end of the hose displaces greatly can be solved, the hose is prevented from being twisted, and the hose mounting and working reliability is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of pipe joints, and in particular relates to an independent rotary joint for connecting aero-engine hoses. Background Art

[0002] Hoses are widely used in aircraft engines for connection. They are easy to install, ensure relative motion between connected pipes, absorb shock and vibration caused by fluid flow within the pipes, and compensate for installation deviations and thermal expansion between connected pipes. However, due to the limitations of hose structure, hose life is significantly reduced when subjected to torsional stress. Therefore, hoses should be installed and operated without torsional stress.

[0003] If the hose connection structure is flange-type or tapered, twisting of the hose during installation and operation is difficult to avoid. Existing technologies use plug-in flexible joints to reduce the effects of twisting stress on hose installation and operation, and use markings on the hose body to check for twisting. Due to the small clearance of the connection structure and the flexibility of the hose body, the plug-in flexible joint structure is difficult to achieve large rotation angles when the connection end is significantly displaced, making it difficult to eliminate hose twisting.

[0004] In view of the above problems, an independent rotary joint for connecting aircraft engine hoses is needed to improve the reliability of the hoses. Summary of the Invention

[0005] The purpose of the present application is to provide an independent rotary joint for connecting hoses of an aircraft engine, so as to solve or alleviate at least one problem in the background technology.

[0006] The technical solution of the present application is: an independent rotary joint for connecting an aircraft engine hose, comprising:

[0007] Captive nut connected to the hose at the fixed end;

[0008] A flat pipe nozzle is rotatably connected to the external nut at one end, and the other end of the flat pipe nozzle is fixedly connected to the nut, and the inner hole of the nut is provided with an inner ring of an angular bearing;

[0009] A rotary joint rotatably connected to the flat nozzle is mounted, wherein a bearing is provided between the rotary joint and the nut, wherein the bearing is provided between an inner ring of an angular bearing of the nut and an outer ring of a bearing mounted on the rotary joint, and the outer ring of the bearing is limited on the rotary joint by a retaining ring; and

[0010] A sealing ring is arranged between the rotary joint and the flat pipe nozzle.

[0011] In at least one embodiment of the present application, an inner ring groove is provided on the inner surface of the external nut, and an outer ring groove is provided on the outer surface of the flat pipe nozzle. The inner ring groove and the outer ring groove cooperate to form a ring groove for installing a stop ring, and the external nut and the flat pipe nozzle are rotatably connected through the stop ring.

[0012] In at least one embodiment of the present application, the cross-section of the retaining ring is circular, and the inner ring groove and the outer ring groove are semicircular grooves.

[0013] In at least one embodiment of the present application, a wrench platform is provided on the flat pipe nozzle and the rotary joint.

[0014] In at least one embodiment of the present application, a sealing ring groove is provided on the mating surface of the rotary joint and the flat nozzle, the sealing ring is arranged in the sealing ring groove, and protective rings are provided on both sides of the sealing ring.

[0015] In at least one embodiment of the present application, a rubber ring is further included, which is arranged between the nut and the rotary joint to seal the gap between the nut and the rotary joint and limit the rotary joint.

[0016] In at least one embodiment of the present application, the sealing ring and / or the rubber ring are made of rubber material.

[0017] The independent rotary joint for connecting aircraft engine hoses provided in the present application realizes large-angle rotation of the hose relative to the connection end by setting a separate angular contact bearing in the pipeline connection structure. It is easy to install, has a simple and compact structure, and is safe and reliable. It can solve the problem of large-angle rotation of the hose relative to the connection end when the hose connection end has a large displacement, avoids hose twisting, and improves hose installation and working reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions provided by this application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application.

[0019] Figure 1 This is a schematic diagram of an independent rotary joint for connecting an aircraft engine hose in this application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.

[0021] In order to ensure that when the hose connection end has a large displacement, the hose can achieve a large angle rotation relative to the connection end, and to save structural space so that a bearing can be set on the rotary joint, while meeting the requirements of bearing installation and joint sealing, the present application provides an independent rotary joint for connecting aircraft engine hoses.

[0022] like Figure 1 As shown, the rotary joint structure for connecting an aircraft engine hose provided in this application includes an external nut 1, a flat nozzle 2, a stop ring 3, a nut 4, a bearing 5, a bearing inner ring 51, a retaining ring 6, a rotary joint 7, a protective ring 81, a sealing ring 8 and a rubber sleeve 9.

[0023] The left side of the inner surface of the external nut 1 is provided with a thread for connecting to the hose at the fixed end. The right side of the inner surface is a smooth structure. An inner ring groove is provided on the right side of the inner surface of the external nut 1 for installing the stop ring 3.

[0024] The left outer surface of the flat pipe nozzle 2 is a smooth structure, on which is provided an outer ring groove that matches the inner ring groove of the external nut 1. The stop ring 3 is arranged in the ring groove formed by the inner ring groove and the outer ring groove, so that the external nut 1 and the flat pipe nozzle 2 are assembled into a component that can rotate relative to each other.

[0025] In some embodiments of the present application, the cross-section of the retaining ring 3 is circular. Accordingly, both the inner and outer ring grooves are semicircular, so that when they fit together, they form a completely circular ring groove. Furthermore, the retaining ring 3 is an open-type retaining ring. When the external nut 1 and the flat nozzle 2 are assembled, the retaining ring 3 elastically deforms to facilitate assembly. Furthermore, the retaining ring 3 can be made of spring steel, such as 65 steel.

[0026] An external thread is provided on the right outer surface of the flat pipe nozzle 2 , and the flat pipe nozzle 2 is fixedly connected to the nut 4 via the external thread, thereby achieving the positioning of the bearing 5 .

[0027] A wrench platform 21 is provided in the middle of the flat nozzle 2 (i.e., between the smooth structure and the external thread) for a tool such as a wrench to apply tightening force to the flat nozzle 2. In some embodiments of the present application, the wrench platform 21 may be rectangular, hexagonal, or racetrack-shaped.

[0028] The left outer surface of the rotary joint 7 mates with the inner surface of the flat nozzle 2, and mates with the nut 4 via the bearing inner ring 51 and the bearing 5. The inner hole of the nut 4 is formed into an angular bearing outer ring through processing or other means. The bearing inner ring 51 is mounted on the rotary joint 7 and is limited by a retaining ring 6 installed in the retaining ring groove of the rotary joint 7 to achieve the fixation of the bearing inner ring 51. The bearing 5 is arranged between the angular bearing outer ring of the nut 4 and the bearing inner ring 51. The nut 4 supports the rotary joint 7 through the bearing 5. The nut 4, bearing 5 and bearing inner ring 51 constitute a separable angular contact bearing.

[0029] In a preferred embodiment of the present application, the bearing 5 is a ball structure.

[0030] A sealing ring groove is provided on the plane where the rotary joint 7 and the flat nozzle 2 mate. A sealing ring 8 is positioned within this groove, sealing the mating surface between the flat nozzle 2 and the rotary joint 7. Furthermore, a protective ring 81 is provided on the side of the groove. The height of the protective ring 81 is substantially the same as the diameter of the sealing ring 8, protecting the sealing ring 8 and improving sealing performance. The inner hole of the flat nozzle 2 provides radial positioning and support for the rotary joint 7.

[0031] In some embodiments of the present application, the sealing ring 8 may be a rubber sealing ring, such as nitrile rubber, fluororubber or silicone rubber.

[0032] A wrench platform is also provided approximately in the middle of the rotary joint 7. A certain gap exists between the wrench platform and the nut 4. To prevent foreign matter from entering the gap and causing relative rotational jamming or wear between the nut 4 and the rotary joint 7, a rubber sleeve 9 is provided between the nut 4 and the rotary joint 7 for dustproof sealing and for limiting the position of the rotary joint 7. In some embodiments of the present application, the rubber sleeve 9 can be made of materials such as nitrile rubber or fluororubber.

[0033] The right side or tail of the rotary joint 7 is provided with an external thread for connecting to a hose structure.

[0034] The independent rotary joint for connecting aircraft engine hoses provided in this application utilizes a separate angular contact bearing within the pipe connection structure to enable large-angle rotation of the hose relative to the connection end. The integrated design of the bearing outer ring and nut simplifies the structure and improves its reliability. The joint offers convenient installation, a simple and compact structure, and safety and reliability. This independent rotary joint solves the problem of large-angle rotation of the hose relative to the connection end when the hose connection end experiences significant displacement, prevents hose twisting, and improves hose installation and operational reliability.

[0035] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An independent rotary joint for connecting aircraft engine hoses, characterized in that: include: Captive nut connected to the hose at the fixed end; A flat pipe nozzle is rotatably connected to the external nut at one end, and the other end of the flat pipe nozzle is fixedly connected to the nut, and the inner hole of the nut is provided with an inner ring of an angular bearing; A rotary joint rotatably connected to the flat nozzle is mounted, wherein a bearing is provided between the rotary joint and the nut, wherein the bearing is provided between an inner ring of an angular bearing of the nut and an outer ring of a bearing mounted on the rotary joint, and the outer ring of the bearing is limited on the rotary joint by a retaining ring; and A sealing ring is arranged between the rotary joint and the flat pipe nozzle.

2. The independent rotary joint for connecting an aircraft engine hose according to claim 1, characterized in that: An inner ring groove is provided on the inner surface of the external nut, and an outer ring groove is provided on the outer surface of the flat pipe nozzle. The inner ring groove and the outer ring groove cooperate to form a ring groove for installing a stop ring. The external nut and the flat pipe nozzle are rotatably connected through the stop ring.

3. The independent rotary joint for connecting an aircraft engine hose according to claim 2, characterized in that: The cross section of the stop ring is circular, and the inner ring groove and the outer ring groove are semicircular grooves.

4. The independent rotary joint for connecting an aircraft engine hose according to claim 1, wherein: The flat pipe nozzle and the rotary joint are provided with a wrench platform.

5. The independent rotary joint for connecting an aircraft engine hose according to claim 1, wherein: A sealing ring groove is provided on the mating surface of the rotary joint and the flat pipe nozzle, the sealing ring is arranged in the sealing ring groove, and protective rings are provided on both sides of the sealing ring.

6. The independent rotary joint for connecting an aircraft engine hose according to claim 5, characterized in that: It also includes a rubber ring, which is arranged between the nut and the rotary joint to seal the gap between the nut and the rotary joint and limit the rotary joint.

7. The independent rotary joint for connecting an aircraft engine hose according to claim 6, characterized in that: The sealing ring and / or the rubber ring are made of rubber material.

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