A hydraulic hose disassembled from a self-sealing rotary compensation

Abstract

The application provides a hydraulic hose with dismounting self-sealing and rotary compensation, and belongs to the field of airplane hydraulic systems, and comprises a hose body for conducting hydraulic oil working medium; an actuator dismounting self-sealing joint installed at one end of the hose body and connected with the actuator, having the functions of quick docking and quick disengaging, and the function of automatically cutting off the hydraulic oil at the end of the hydraulic hose after disengaging to prevent the hydraulic oil from leaking after the hydraulic hose is dismounted; a rotary compensation joint installed at the other end of the hose body and used for further compensation of the movement of the hose body during movement deformation, preventing the hose body from being damaged or having a shortened service life due to twisting and excessive bending; and a buckling sleeve, which realizes the connection and fixation of the hose body with the actuator dismounting self-sealing joint and the hose body with the rotary compensation joint in the form of buckling. The hose bending is further compensated, and the reliability and service life of the hose are improved.

Description

Technical Field

[0001] This application belongs to the technical field of aircraft hydraulic systems, and specifically relates to a disassembly self-sealing hydraulic hose with rotation compensation. Background Technology

[0002] Aircraft hydraulic hoses are used to conduct the working medium in hydraulic systems. In addition to conducting the medium, hydraulic hoses connected to actuators also compensate for motion during actuator rotation. The working medium in hydraulic hoses operates under high pressure and harsh environments. Improper hose arrangement can lead to oil leaks within the hose's service life, further causing hydraulic system failure. This can range from affecting aircraft mission execution to seriously compromising flight safety. The arrangement of actuator hydraulic hoses must meet requirements such as minimum bending radius and straight sections. During actuator rotation, the hose needs to bend within a single plane to avoid twisting, and ideally, there should only be one bend during the arrangement. These requirements place high demands on the space and routing of the hoses. Especially for small aircraft, where space is very limited, it is difficult to meet the hose installation requirements, or to extend the hose's lifespan without meeting bending radius and other requirements.

[0003] In addition, hydraulic oil may leak from the detached end of the hose during maintenance, requiring depressurization and oil draining of the hydraulic system. After replacement, the hydraulic system needs to be replenished with oil and bleed. The hydraulic oil leaking from the detached part of the hydraulic hose will leak into the machine body, requiring cleaning, making maintenance work heavy.

[0004] Therefore, there is a need for a technical solution that allows for the rational arrangement and installation of hydraulic hoses for aircraft actuators within a limited installation space, while meeting requirements such as minimum bending radius, straight section, and installation on a single plane. At the same time, it is desirable to avoid cumbersome maintenance work such as draining, replenishing, and venting the system due to oil leaks when installing or removing hoses. Summary of the Invention

[0005] To solve the above problems, this application provides a hydraulic hose with self-sealing disassembly and rotation compensation, comprising: hose body (3), actuator disassembly self-sealing connector (1), rotation compensation connector (4), and crimp sleeve (2).

[0006] The hose body (3) is a flexible hollow tube body. One end of it is fastened to the actuator disassembly self-sealing connector (1) through the crimp sleeve (2), and the other end is fastened to the rotary compensation connector (4) through the crimp sleeve (2).

[0007] The free end of the self-sealing actuator disassembly connector (1) is used to connect to the actuator; the rotary compensation connector (4) has an L-shaped bending structure, and its free end is used to connect to the external fixed pipeline. The rotary compensation connector (4) can rotate around a direction perpendicular to the axis of the hose body (3) to provide rotational compensation for the bending deformation of the hose body (3).

[0008] Preferably, the hose body (3) has a multi-layer coaxial sleeve structure, which includes, from the inside to the outside: a conductive layer (8), an inner tube (7), a reinforcing layer (6), and a protective sleeve (5).

[0009] The inner tube (7) is used for the conduction of the working medium and can be made of materials such as polyvinyl fluoride and rubber. The conductive layer (8) is a graphite coating applied to the inner wall of the inner tube (7). The reinforcing layer (6) is stainless steel wire or aramid woven mesh. The protective sleeve (5) is a wear-resistant sleeve made of materials such as polytetrafluoroethylene and leather or a fireproof sleeve made of materials such as vulcanized rubber and asbestos.

[0010] Preferably, the actuator disassembly self-sealing connector (1) includes a hose connection connector (13), a spring (14), a piston (15), and a conical sealing ring (16).

[0011] The hose connector (13) is a hollow stepped shaft structure, with a large diameter section and a small diameter section arranged sequentially along the axial direction inside to form a piston chamber;

[0012] The piston (15) includes an integrally formed piston head and piston rod. The piston head is slidably accommodated in the large-diameter section, and there is an annular flow gap between the piston head and the large-diameter section. The piston rod passes through the small-diameter section.

[0013] The conical sealing ring (16) is sleeved on the conical surface of the piston head. Under the preload of the spring (14), the conical surface of the piston head and the conical stepped surface of the piston cavity are tightly fitted by the conical sealing ring (16), thereby blocking the flow channel.

[0014] The outer wall of the hose connector (13) is provided with an annular limiting step for axial positioning.

[0015] Preferably, the free end of the hose connector (13) is provided with an external thread for fixing to the actuator connector (9) by means of a mounting nut (10);

[0016] The mating sealing ring (17) is disposed between the free end face of the hose connection joint (13) and the end face of the actuator joint (9) to form a static seal;

[0017] Both the hose connector (13) and the mounting nut (10) are provided with fuse holes (11) for threading fuses (12) to prevent loosening and locking.

[0018] Preferably, the actuator connector (9) has an axial through hole inside, and the piston rod has a radial through hole on its side wall;

[0019] When docked with the actuator, the push rod (18) at the center of the actuator connector (9) overcomes the elastic force of the spring (14) and pushes the piston (15) to move axially, causing the conical sealing ring (16) to disengage from the sealing surface, thereby opening the internal flow channels of the axial through hole, the radial through hole and the hose body (3).

[0020] Preferably, the rotary compensating joint (4) includes a rotating shaft (19), an adapter seat (20), an end face sealing ring (21), a rotary sealing ring (22), a plug (23), a locking nut (24), a retaining ring (25), and a pipe joint (26).

[0021] The rotating shaft (19) is an integrally formed L-shaped bent pipe structure with a first section and a second section that are perpendicular to each other; the first section is a straight pipe section that is inserted into the interior of the flexible tube body (3); the second section is a short cylindrical journal with radial perforations on its side wall.

[0022] The adapter (20) is a T-shaped housing with a horizontal part being a sleeve part in which the second section of the rotating shaft (19) is rotatably inserted; its longitudinal part is the pipe connector (26), the axis of the pipe connector (26) is perpendicular to the axis of the sleeve part, and the internal flow channel of the pipe connector (26) is connected to the internal flow channel of the rotating shaft (19) through a radial perforation on the side wall of the rotating shaft (19).

[0023] Preferably, four sealing grooves are provided on the inner wall surface of the sleeve portion of the adapter (20).

[0024] The two end face sealing rings (21) and the two rotary sealing rings (22) are respectively embedded in the sealing groove and located on both sides of the through hole on the rotating shaft (19) to form a bidirectional rotary dynamic sealing structure.

[0025] The end face sealing ring (21) and the rotary sealing ring (22) are O-ring rubber sealing rings or combination sealing rings.

[0026] Preferably, the second end of the shaft (19) is threadedly connected to the plug (13), the locking nut (24) is threadedly connected to the plug (23), and the retaining ring (25) is pressed against the end face of the adapter (20) to restrict the shaft (19) from moving axially.

[0027] Preferably, the axis of the pipe connector (26) is perpendicular to the axis of the sleeve portion of the adapter (20), and the outer port of the pipe connector (26) is provided with an inner conical surface for connection and fixation.

[0028] Preferably, the outer wall of the sleeve portion of the adapter (20) is provided with a flat wrench clamping surface for applying torque when installing or removing the rotary compensating joint (4).

[0029] Preferably, after the crimping sleeve (2) is crimped and deformed, it forces the inner wall of the hose body (3) to deform the outer peripheral surface of the actuator disassembly self-sealing connector (1) and the outer peripheral surface of the first section of the rotating shaft (19) to form a pull-out force that meets the requirements.

[0030] Preferably, a chamfered guide structure is provided at the end of the crimp sleeve (2) to prevent cracks caused by stress concentration.

[0031] Preferably, a limiting step is provided on the connecting outer wall of the first section of the actuator disassembly self-sealing connector (1) and the rotating shaft (19), and the end of the crimping sleeve (2) abuts against the limiting step to prevent the connector from over-extending during the crimping process.

[0032] Preferably, the axis of the actuator connector (9) is parallel to the axis of rotation of the first segment of the rotary compensation connector (4) to avoid twisting of the hose body (3) during movement.

[0033] This application solves the problem of difficulty in installing and arranging actuator hydraulic hoses as required within the confined space of an aircraft, further compensating for hose bending and improving hose reliability and lifespan. At the same time, it reduces the series of maintenance tasks required during hose disassembly and assembly, such as system draining, replenishing, and venting, due to oil leakage at hose connections. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a disassembly self-sealing hydraulic hose with rotation compensation according to this application.

[0035] Figure 2 This is a diagram of the hose body structure.

[0036] Figure 3 This is a structural diagram showing the connection status between the actuator disassembly self-sealing connector and the actuator.

[0037] Figure 4 This is a structural diagram showing the actuator disassembly self-sealing connector detached from the actuator.

[0038] Figure 5 This is a structural diagram of a rotary compensating joint. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. 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 only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings.

[0042] To overcome the problems mentioned in the background art, this application provides a disassembly self-sealing hydraulic hose with rotation compensation.

[0043] like Figure 1 As shown, the hydraulic hose with self-sealing disassembly and rotation compensation provided in this application includes: actuator disassembly self-sealing connector 1, crimp sleeve 2, hose body 3, and rotation compensation connector 4.

[0044] like Figure 2 As shown, the hose body 3 includes: a protective sleeve 5, a reinforcing layer 6, an inner tube 7, and a conductive layer 8.

[0045] like Figure 3 , Figure 4 As shown, the actuator disassembly self-sealing connector 1 includes a fuse hole 11, a fuse 12, a hose connection connector 13, a spring 14, a piston 15, and a conical sealing ring 16. The actuator mating part includes an actuator connector 9, a mounting nut 10, a fuse hole 11, a mating sealing ring 17, and a push rod 18.

[0046] like Figure 5 As shown, the rotary compensating joint 4 includes: a rotating shaft 19, an adapter seat 20, an end face sealing ring 21, a rotary sealing ring 22, a plug 23, a locking nut 24, a retaining ring 25, and a pipe fitting 26.

[0047] A self-sealing hydraulic hose with rotational compensation is composed of: an actuator self-sealing connector 1, a crimping sleeve 2, a hose body 3, and a rotational compensation connector 4. The hose body 3 is used to conduct hydraulic oil as the working medium, achieving motion compensation. The actuator self-sealing connector 1, installed at one end of the hose body 3, connects to the actuator and has a quick docking and disengagement function. It also has the function of automatically cutting off the hydraulic oil at the end of the hydraulic hose after disengagement, preventing hydraulic oil leakage after the hydraulic hose is removed. The rotational compensation connector 4, installed at the other end of the hose body 3, is used for further compensation of the motion of the hose body 3 during deformation, preventing damage or shortened lifespan due to torsion or excessive bending. The crimping sleeve 2 connects and fixes the end of the hose body 3 near the actuator to the actuator self-sealing connector 1 through crimping, and connects and fixes the end of the hose body 3 near the aircraft's piping to the rotational compensation connector 4.

[0048] The hose body 3 comprises a protective sleeve 5, a reinforcing layer 6, an inner tube 7, and a conductive layer 8. The protective sleeve 5 can be an anti-wear sleeve or a fireproof sleeve. The anti-wear sleeve prevents wear against the machine's structural systems and can be made of materials such as leather or polytetrafluoroethylene (PTFE). The fireproof sleeve provides flame retardancy or heat insulation in case of fire and can be made of materials such as rubber. Depending on the actual installation requirements, the protective sleeve can be omitted if this function is not needed. The reinforcing layer 6 increases the strength of the hydraulic hose and can be a metal braided layer or a non-metal braided layer. The inner tube 7 conducts the working medium and can be made of materials such as polytetrafluoroethylene (PTFE) or rubber. The conductive layer 8 conducts static electricity generated by friction between the hose body 3 and the hydraulic oil and can be made of conductive materials such as graphite. After coating, the conductive layer is stably attached to the inside of the inner tube.

[0049] The actuator disassembly self-sealing connector 1 comprises a fuse hole 11, a fuse 12, a hose connection connector 13, a spring 14, a piston 15, and a conical sealing ring 16. The actuator mating parts include: actuator connector 9, mounting nut 10, fuse hole 11, mating sealing ring 17, and push rod 18. Actuator connector 9 and hose connection connector 13 are fixed by mounting nut 10 and sealed by mating sealing ring 17. A fuse 12 is inserted into the fuse hole 11 on mounting nut 10 and hose connection connector 13 to prevent loosening. Hose connection connector 13 is fixed to hose body 3. This enables quick disassembly and installation. Piston 15 is pre-tightened to hose connection connector 13 via spring 14. When docking with the actuator, the push rod 18 in the middle of the actuator connector 9 pushes the piston 15 against the spring 14 to allow the working medium to flow. When disengaging from the actuator, the piston 15, under the action of the spring 14, achieves a conical seal between the piston 15 and the hose connection connector 13 through the conical sealing ring 16, preventing hydraulic oil leakage during disassembly.

[0050] The hose connector 13 has a piston chamber, which includes a large-diameter section and a small-diameter section. The piston 15 has a piston head and a piston rod. The piston head is fitted into the large-diameter section, and the piston rod is fitted into the small-diameter section. There is an annular flow gap between the piston head and the large-diameter section. The actuator connector 9 has an axial through hole in its interior along the axial direction. The piston rod wall has a radial through hole. The actuator connector 9 is connected to the annular flow gap, the radial through hole of the piston rod, and the hose connector 13 for connecting the internal pipe of the hose body 3. The piston head has a conical surface, and the large-diameter section has a conical surface corresponding to the threshold. A spring 14 is fitted in the blind hole of the piston rod to make the piston head and the conical surface of the large-diameter section fit tightly together. The preload of the spring 14 makes the piston head and the conical surface of the large-diameter section fit tightly together, thereby sealing the annular flow gap.

[0051] The rotary compensating joint 4 comprises a rotating shaft 19, an adapter 20, an end face sealing ring 21, a rotary sealing ring 22, a plug 23, a locking nut 24, a retaining ring 25, and a pipe connector 26. The rotating shaft 19 is connected to the hose body 3. After the adapter 20 is installed and fixed on the machine, its pipe connector 26 is connected to the machine's piping. The adapter 20 rotates around the rotating shaft 19, and the adapter 20 and the rotating shaft 19 are sealed using the end face sealing ring 21 and the rotary sealing ring 22. The rotating shaft 19 is threadedly connected to the plug 13, and the locking nut 24 is threadedly connected to the plug 23, pressing the retaining ring 25 against the end face of the adapter 20 to restrict the axial movement of the rotating shaft 19.

[0052] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A disassembly-resistant, self-sealing hydraulic hose with rotation compensation, characterized in that, include: Hose body (3), actuator disassembly self-sealing connector (1), rotary compensation connector (4) and crimp sleeve (2); The hose body (3) is a flexible hollow tube body. One end of it is fastened to the actuator disassembly self-sealing connector (1) through the crimp sleeve (2), and the other end is fastened to the rotary compensation connector (4) through the crimp sleeve (2). The free end of the self-sealing actuator disassembly connector (1) is used to connect to the actuator; the rotary compensation connector (4) has an L-shaped bending structure, and its free end is used to connect to the external fixed pipeline. The rotary compensation connector (4) can rotate around a direction perpendicular to the axis of the hose body (3) to provide rotational compensation for the bending deformation of the hose body (3).

2. The hydraulic hose with self-sealing and rotation compensation for disassembly as described in claim 1, characterized in that, The hose body (3) has a multi-layer coaxial sleeve structure, which includes, from the inside to the outside: a conductive layer (8), an inner tube (7), a reinforcing layer (6) and a protective sleeve (5). The inner tube (7) is used for the conduction of the working medium and can be made of materials such as polyvinyl fluoride and rubber. The conductive layer (8) is a graphite coating applied to the inner wall of the inner tube (7). The reinforcing layer (6) is stainless steel wire or aramid woven mesh. The protective sleeve (5) is a wear-resistant sleeve made of materials such as polytetrafluoroethylene and leather or a fireproof sleeve made of materials such as vulcanized rubber and asbestos.

3. The hydraulic hose with self-sealing and rotation compensation for disassembly as described in claim 1, characterized in that, The actuator disassembly self-sealing connector (1) includes a hose connection connector (13), a spring (14), a piston (15), and a conical sealing ring (16). The hose connector (13) is a hollow stepped shaft structure, with a large diameter section and a small diameter section arranged sequentially along the axial direction inside to form a piston chamber; The piston (15) includes an integrally formed piston head and piston rod. The piston head is slidably accommodated in the large-diameter section, and there is an annular flow gap between the piston head and the large-diameter section. The piston rod passes through the small-diameter section. The conical sealing ring (16) is sleeved on the conical surface of the piston head. Under the preload of the spring (14), the conical surface of the piston head and the conical stepped surface of the piston cavity are tightly fitted by the conical sealing ring (16), thereby blocking the flow channel. The outer wall of the hose connector (13) is provided with an annular limiting step for axial positioning.

4. The hydraulic hose with self-sealing and rotation compensation for disassembly as described in claim 3, characterized in that, The free end of the hose connector (13) is provided with an external thread for fixing to the actuator connector (9) by means of a mounting nut (10); The mating sealing ring (17) is disposed between the free end face of the hose connection joint (13) and the end face of the actuator joint (9) to form a static seal; Both the hose connector (13) and the mounting nut (10) are provided with fuse holes (11) for threading fuses (12) to prevent loosening and locking.

5. The hydraulic hose with self-sealing and rotation compensation for disassembly as described in claim 3, characterized in that, The actuator connector (9) has an axial through hole inside, and the piston rod has a radial through hole on its side wall. When docked with the actuator, the push rod (18) at the center of the actuator connector (9) overcomes the elastic force of the spring (14) and pushes the piston (15) to move axially, causing the conical sealing ring (16) to disengage from the sealing surface, thereby opening the internal flow channels of the axial through hole, the radial through hole and the hose body (3).

6. The hydraulic hose with self-sealing and rotation compensation for disassembly as described in claim 1, characterized in that, The rotary compensating joint (4) includes a rotating shaft (19), an adapter (20), an end face sealing ring (21), a rotary sealing ring (22), a plug (23), a locking nut (24), a retaining ring (25), and a pipe fitting (26). The rotating shaft (19) is an integrally formed L-shaped bent pipe structure, with a first section and a second section that are perpendicular to each other; The first section is a straight pipe section, which is inserted into the inside of the flexible tube body (3); the second section is a short cylindrical journal, and a radial perforation is provided on its side wall; The adapter (20) is a T-shaped housing with a horizontal part being a sleeve part in which the second section of the rotating shaft (19) is rotatably inserted; its longitudinal part is the pipe connector (26), the axis of the pipe connector (26) is perpendicular to the axis of the sleeve part, and the internal flow channel of the pipe connector (26) is connected to the internal flow channel of the rotating shaft (19) through a radial perforation on the side wall of the rotating shaft (19).

7. The disassembly self-sealing hydraulic hose with rotation compensation as described in claim 6, characterized in that, The adapter (20) has four sealing grooves on the inner wall of the sleeve portion; The two end face sealing rings (21) and the two rotary sealing rings (22) are respectively embedded in the sealing groove and located on both sides of the through hole on the rotating shaft (19) to form a bidirectional rotary dynamic sealing structure.

8. The end face sealing ring (21) and the rotary sealing ring (22) are O-ring rubber sealing rings or combination sealing rings.

9. The hydraulic hose with self-sealing and rotation compensation for disassembly as described in claim 6, characterized in that, The second end of the shaft (19) is threadedly connected to the plug (13), the locking nut (24) is threadedly connected to the plug (23), and the retaining ring (25) is pressed against the end face of the adapter (20) to restrict the shaft (19) from moving axially.

10. The disassembly self-sealing hydraulic hose with rotation compensation as described in claim 6, characterized in that, The axis of the pipe connector (26) is perpendicular to the axis of the sleeve portion of the adapter (20), and the outer port of the pipe connector (26) is provided with an inner conical surface for connection and fixation.

11. The hydraulic hose with self-sealing and rotation compensation for disassembly as described in claim 6, characterized in that, The adapter (20) has a flat wrench clamping surface on the outer wall of the sleeve portion for applying torque when installing or removing the rotary compensating connector (4).

12. The hydraulic hose with self-sealing and rotation compensation for disassembly as described in claim 1, characterized in that, After the crimping sleeve (2) is deformed, it forces the inner wall of the hose body (3) to deform the outer circumference of the actuator disassembly self-sealing connector (1) and the outer circumference of the first section of the rotating shaft (19) to form a pull-out force that meets the requirements.

13. The hydraulic hose with rotation compensation as described in claim 1, characterized in that, A chamfered guide structure is provided at the end of the crimp sleeve (2) to prevent cracks caused by stress concentration.

14. The hydraulic hose with rotation compensation as described in claim 1, characterized in that, The actuator disassembly self-sealing connector (1) and the first section of the rotating shaft (19) are provided with a limiting step. The end of the crimping sleeve (2) abuts against the limiting step to prevent the connector from extending too far during the crimping process.

15. The hydraulic hose with rotation compensation as described in claim 1, characterized in that, The axis of the actuator connector (9) is parallel to the axis of rotation of the first section of the rotary compensation connector (4) to avoid twisting of the hose body (3) during movement.

Images