Swivel joint for aircraft refueling hard pipe
By designing the movable nesting connection between the inner ring and the outer ring of the rotary joint in the rotary joint of the airplane gas refueling hard pipe, and combining the design of bushings, tapered roller bearings and locking nuts, the problems of large sealing, pressure resistance and rotational resistance of the existing joints are solved, and efficient and reliable folding and storage of the gas refueling and hard pipes are achieved.
Patent Information
- Application Number
- CN202422315303.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The existing swivel joints have problems such as poor sealing, poor pressure resistance, large rotational resistance, complex structure and inability to withstand large bending moments in the aircraft fueling hard pipes.
A rotary joint is designed. By setting the outer ring of the rotary joint at one end of the outer circumference of the inner ring of the rotary joint, and setting a bushing and tapered roller bearing between the inner ring and the outer ring, combined with the design of locking nuts and steel balls, the movable nesting connection and axial positioning of the joints are achieved.
It realizes a rotary joint with good sealing, good pressure resistance, small rotation resistance, simple structure, reliable connection, and able to withstand large bending moments, which is suitable for the application of aircraft fueling hard pipes.
Smart Images
Figure CN222950614U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pipeline joints, and in particular relates to a swivel joint for an aircraft refueling hard pipe. Background Art
[0002] With the rapid development of aviation transportation, aircraft need to be refueled every day. When the aircraft is refueled on the ground, when a hard pipe is used to transport oil, the pipe cannot be rotated, and thus aircraft of different models and different positions cannot be refueled. After refueling, the hard pipe cannot be folded and stored.
[0003] At present, the existing rotary joints have defects such as poor sealing, poor pressure resistance, large rotation resistance, complex structure, and inability to withstand large bending moments. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the disadvantages of the above-mentioned prior art and provide a swivel joint for aircraft refueling hard pipe which has good sealing, good pressure resistance, small rotation resistance, simple structure, reliable connection and can withstand large bending moment.
[0005] The technical solution adopted to solve the above technical problems is: a rotary joint outer ring is arranged at one end of the outer circumference of the inner ring of the rotary joint, a rotary joint bushing is arranged between the inner ring of the rotary joint and the outer ring of the rotary joint, a second tapered roller bearing is arranged between the inner ring of the rotary joint, the outer ring of the rotary joint and the rotary joint bushing, the second tapered roller bearing is located on one side of the rotary joint bushing, the second tapered roller bearing is fixedly connected to the inner ring of the rotary joint through a locking nut, a first tapered roller bearing is arranged between the inner ring of the rotary joint, the outer ring of the rotary joint and the rotary joint bushing, the first tapered roller bearing is located on the other side of the rotary joint bushing, a screw plug is arranged on the outer circumferential side wall of the outer ring of the rotary joint, a steel ball is fixedly installed between the outer ring of the rotary joint and the rotary joint bushing, and the screw plug is in close contact with the steel ball.
[0006] Furthermore, one end of the inner ring of the rotary joint is movably nested and connected with one end of the outer ring of the rotary joint.
[0007] Furthermore, a first flange is provided at the other end of the inner ring of the rotary joint, and the other end of the inner ring of the rotary joint is connected to the first hard pipe through the first flange; a second flange is provided at the other end of the outer ring of the rotary joint, and the other end of the outer ring of the rotary joint is connected to the second hard pipe through the second flange; and end face sealing gaskets are respectively provided on the first flange and the second flange.
[0008] Furthermore, a Gly ring for a rotating hole is arranged between the connection between the outer ring of the rotating joint and the rotating joint bushing, a Gly ring for a second rotating shaft is arranged between the connection between the inner ring of the rotating joint and the rotating joint bushing, and a Gly ring for a first rotating shaft is arranged between the connection between the outer ring of the rotating joint and the inner ring of the rotating joint.
[0009] Furthermore, a locking washer for a round nut is provided between the locking nut and the inner ring of the rotary joint and the second tapered roller bearing.
[0010] Furthermore, a polytetrafluoroethylene gasket is provided between the screw plug and the outer side wall of the outer ring of the rotary joint.
[0011] The utility model adopts an active nesting connection between one end of the inner ring of the rotary joint and one end of the outer ring of the rotary joint, a rotary joint bushing is arranged between the inner ring of the rotary joint and the outer ring of the rotary joint, a first tapered roller bearing and a second tapered roller bearing are arranged between the inner ring of the rotary joint, the outer ring of the rotary joint and the rotary joint bushing, a steel ball is fixedly installed between the outer ring of the rotary joint and the rotary joint bushing, the screw plug is in close contact with the steel ball, the steel ball is used for axial positioning, and can connect two hard pipes so that the hard pipe pipeline can rotate 360 degrees, and the hard pipe pipeline can be folded and stored by rotation after refueling is completed. The utility model has the advantages of good sealing, good pressure resistance, small rotation resistance, simple structure, reliable connection and ability to withstand large bending moments. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 The utility model is a structural schematic diagram of an embodiment of a swivel joint for an aircraft refueling hard pipe.
[0013] Figure numerals: 1. outer ring of rotary joint; 2. inner ring of rotary joint; 3. rotary joint bushing; 4. locking nut; 5. polytetrafluoroethylene gasket; 6. screw plug; 7. first tapered roller bearing; 8. stop washer for round nut; 9. steel ball; 10. Gly ring for first rotating shaft; 11. Gly ring for second rotating shaft; 12. Gly ring for rotating hole; 13. second tapered roller bearing. DETAILED DESCRIPTION
[0014] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0015] like Figure 1As shown, the swivel joint for aircraft refueling hard pipe of this embodiment is composed of a swivel joint outer ring 1, a swivel joint inner ring 2, a swivel joint bushing 3, a locking nut 4, a polytetrafluoroethylene gasket 5, a screw plug 6, a first tapered roller bearing 7, a stop gasket 8 for round nuts, a steel ball 9, a first rotating shaft Gly ring 10, a second rotating shaft Gly ring 11, a rotating hole Gly ring 12, and a second tapered roller bearing 13.
[0016] The outer ring 1 of the rotary joint is arranged at one end of the outer circumference of the inner ring 2 of the rotary joint, and one end of the inner ring 2 of the rotary joint is movably nested and connected with one end of the outer ring 1 of the rotary joint. The other end of the inner ring 2 of the rotary joint is arranged with a first flange, and the other end of the inner ring 2 of the rotary joint is connected to the first hard pipe through the first flange. The other end of the outer ring 1 of the rotary joint is arranged with a second flange, and the other end of the outer ring 1 of the rotary joint is connected to the second hard pipe through the second flange. The first flange and the second flange are respectively provided with end face sealing gaskets.
[0017] A rotary joint bushing 3 is arranged between the rotary joint inner ring 2 and the rotary joint outer ring 1, a grid ring 12 for a rotary hole is arranged between the connection between the rotary joint outer ring 1 and the rotary joint bushing 3, a grid ring 11 for a second rotary shaft is arranged between the connection between the rotary joint inner ring 2 and the rotary joint bushing 3, and a grid ring 10 for a first rotary shaft is arranged between the connection between the rotary joint outer ring 1 and the rotary joint inner ring 2.
[0018] A second tapered roller bearing 13 is arranged between the rotary joint inner ring 2, the rotary joint outer ring 1 and the rotary joint bushing 3. The second tapered roller bearing 13 is located on one side of the rotary joint bushing 3. The second tapered roller bearing 13 is fixedly connected to the rotary joint inner ring 2 through a locking nut 4. A retaining washer 8 for round nuts is arranged between the locking nut 4 and the rotary joint inner ring 2 and the second tapered roller bearing 13. A first tapered roller bearing 7 is arranged between the rotary joint inner ring 2, the rotary joint outer ring 1 and the rotary joint bushing 3. The first tapered roller bearing 7 is located on the other side of the rotary joint bushing 3. A screw plug 6 is arranged on the outer circumferential side wall of the rotary joint outer ring 1. A steel ball 9 is fixedly installed between the rotary joint outer ring 1 and the rotary joint bushing 3. The steel ball 9 is used for axial positioning. The screw plug 6 is in close contact with the steel ball 9. A polytetrafluoroethylene gasket 5 is arranged between the screw plug 6 and the outer side wall of the rotary joint outer ring 1.
[0019] The working principle of this embodiment is as follows: during use of this embodiment, the other end of the inner ring 2 of the rotary joint is connected to the first hard pipe through the first flange, and the other end of the outer ring 1 of the rotary joint is connected to the second hard pipe through the second flange, so that the two hard pipes can be connected, so that the hard pipe pipeline can rotate 360°, and after refueling is completed, the hard pipe pipeline can be folded and stored by rotation.
[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.
Claims
1. A swivel joint for an aircraft refueling pipe, characterized in that: A rotary joint outer ring (1) is arranged at one end of the outer circumference of the rotary joint inner ring (2); a rotary joint bushing (3) is arranged between the rotary joint inner ring (2) and the rotary joint outer ring (1); a second tapered roller bearing (13) is arranged between the rotary joint inner ring (2), the rotary joint outer ring (1) and the rotary joint bushing (3); the second tapered roller bearing (13) is located on one side of the rotary joint bushing (3); and the second tapered roller bearing (13) is connected to the rotary joint bushing (3) through a locking nut (4). The inner ring (2) of the rotary joint is fixedly connected, a first tapered roller bearing (7) is arranged between the inner ring (2) of the rotary joint, the outer ring (1) of the rotary joint and the rotary joint bushing (3), the first tapered roller bearing (7) is located on the other side of the rotary joint bushing (3), a screw plug (6) is arranged on the outer circumferential side wall of the outer ring (1) of the rotary joint, a steel ball (9) is fixedly installed between the outer ring (1) of the rotary joint and the rotary joint bushing (3), and the screw plug (6) is in close contact with the steel ball (9).
2. The swivel joint for aircraft refueling pipe according to claim 1, characterized in that: One end of the inner ring (2) of the rotary joint is movably nested and connected with one end of the outer ring (1) of the rotary joint.
3. The swivel joint for aircraft refueling pipe according to claim 1, characterized in that: A first flange is provided at the other end of the inner ring (2) of the rotary joint, and the other end of the inner ring (2) of the rotary joint is connected to the first hard pipe through the first flange. A second flange is provided at the other end of the outer ring (1) of the rotary joint, and the other end of the outer ring (1) of the rotary joint is connected to the second hard pipe through the second flange. End face sealing gaskets are respectively provided on the first flange and the second flange.
4. The swivel joint for aircraft refueling pipe according to claim 1, characterized in that: A Gly ring (12) for a rotating hole is arranged between the connection between the outer ring (1) of the rotating joint and the rotating joint bushing (3), a Gly ring (11) for a second rotating shaft is arranged between the connection between the inner ring (2) of the rotating joint and the rotating joint bushing (3), and a Gly ring (10) for a first rotating shaft is arranged between the connection between the outer ring (1) of the rotating joint and the inner ring (2) of the rotating joint.
5. The swivel joint for aircraft refueling pipe according to claim 1, characterized in that: A locking washer (8) for a round nut is arranged between the locking nut (4), the inner ring of the rotary joint (2) and the second tapered roller bearing (13).
6. The swivel joint for aircraft refueling pipe according to claim 1, characterized in that: A polytetrafluoroethylene gasket (5) is arranged between the screw plug (6) and the outer side wall of the outer ring (1) of the rotary joint.