A dual-oil-cavity rotary joint

Abstract

This utility model relates to the field of rotary joint technology and discloses a dual-oil-cavity rotary joint, which solves the problem that existing rotary joints lack self-sealing capability at the connection point. During disassembly or accidental disconnection, the internal medium will splash and leak due to pressure, causing not only resource waste and environmental pollution but also potential safety hazards such as equipment damage, burns, or fires. The joint includes a main body, with a rotating column fixedly installed at one end. Two flow channels are opened inside the rotating column. A rotating sleeve is fitted onto the surface of the main body. Both ends of the rotating sleeve and the rotating column are rotatably connected by sealed bearings. Three sealing seats are fixedly installed parallel and equidistantly inside the rotating sleeve. This rotary joint has excellent self-sealing capability at the connection point, preventing internal oil from splashing and leaking due to pressure during disassembly or accidental disconnection, thus avoiding resource waste and environmental pollution.

Description

Technical Field

[0001] This utility model belongs to the field of rotary joint technology, specifically a double oil cavity rotary joint. Background Technology

[0002] The dual-chamber rotary joint is a key device that enables independent dual-path oil transfer between rotating and stationary components. It features two non-interfering sealed oil chambers, employing precise dynamic sealing technology (such as combined sealing rings and gap compensation structures) to ensure no leakage or cross-contamination of the two oil paths (such as hydraulic oil and lubricating oil) even at high speeds (up to thousands of revolutions per minute). Its core advantage lies in its ability to simultaneously transfer two media with different pressures or functions, meeting the needs of complex operating conditions. This product is widely used in CNC machine tools (dual-circuit spindle lubrication and cooling), wind power equipment (dual hydraulic control for yaw and pitch systems), construction machinery (separation of hydraulic and lubrication systems for rotating platforms), and metallurgical machinery (dual oil circuits for vibration and cooling in continuous casting machine crystallizers), significantly improving equipment stability and maintenance efficiency.

[0003] Existing rotary joints lack self-sealing capabilities at their connections. When disassembly or accidentally disconnected, the internal medium may leak due to pressure, causing not only resource waste and environmental pollution, but also potential safety hazards such as equipment damage, burns, or fires. The risks are particularly pronounced in high-pressure, high-temperature, or corrosive media environments. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a dual-oil-cavity rotary joint, which effectively solves the problem that the connection of the existing rotary joint lacks self-sealing capability. When disassembly or accidentally disconnected, the internal medium will splash and leak due to pressure, which not only causes waste of resources and environmental pollution, but may also cause safety hazards such as equipment damage, burns to personnel or fire.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dual-oil-cavity rotary joint, comprising a joint body, a rotating column fixedly installed at one end of the joint body, two flow channels opened inside the rotating column, a rotating sleeve fitted on the surface of the joint body, the two ends of the rotating sleeve and the rotating column being rotatably connected by sealed bearings, three sealing seats fixedly installed parallel and equidistantly inside the rotating sleeve, three sealing rings fixedly installed parallel and equidistantly on the surface of the rotating column, the three sealing rings being tightly fitted to the interior of the three sealing seats, the three sealing seats and the three sealing rings being separated into two flow cavities, oil outlet grooves being opened at the upper and lower parts of the rotating sleeve, oil outlet pipes being fixedly installed on the surface of the rotating column and at the ends of the two oil outlet grooves, one end of the inner wall of the two oil outlet pipes being provided with internal threads, a connector being inserted inside the oil outlet pipes, external threads being opened on the surface of the two connectors, the two connectors being threadedly connected to the two oil outlet pipes through external and internal threads, a self-sealing component being provided between the interior of the two oil outlet pipes and the two oil outlet grooves, and an oil inlet head being fixedly installed at one end of the joint body.

[0006] Preferably, the self-sealing assembly includes two mating sleeves disposed between the two oil outlet pipes and the two oil outlet grooves. A sealing gasket is fixedly installed at one end of each of the two mating sleeves. One end of the mating joint is mated to the inside of the two mating sleeves, and the two mating joints are respectively pressed against the two sealing gaskets at their close-to-each ends. A sealing disc is fixedly installed at the close-to-each ends of the two mating sleeves through a connecting pipe, and the two sealing discs are adapted to the two oil outlet grooves. A third sealing ring is fixedly installed on the circumferential surface of each of the two sealing discs. Two openings are symmetrically opened on the surface of each of the two connecting pipes.

[0007] Preferably, an installation groove is provided between the inner walls of the two oil outlet pipes and the two oil outlet grooves, a pressure ring is fixedly installed on the surface of the two mating sleeves, and a spring is sleeved in the middle of the surface of the two mating sleeves. The two ends of the two springs are respectively fixedly connected to the pressure ring and the inside of the installation groove.

[0008] Preferably, two first grooves and two second grooves are respectively formed in the middle of the inner wall of the two oil outlet pipes and the inner wall of the two oil outlet grooves, and a first sealing ring and a second sealing ring are respectively fixedly installed inside the two first grooves and the two second grooves.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: When in use, the rotating column on the connector body can rotate along the inside of the rotating sleeve through two sealed bearings; the oil enters the two flow channels of the rotating column through two oil inlets, and enters the two flow chambers from the two flow channels; the oil in the two flow chambers will enter the two connecting pipes through two oil outlet grooves and two openings, and be discharged through two mating sleeves and two mating joints.

[0010] When disassembling the two couplings, the operator rotates the couplings, using the engagement of the external and internal threads to unscrew them. Then, the spring force pushes the pressure ring, causing the pressure ring to push the mating sleeve outward from inside the oil outlet pipe. As the mating sleeve moves, it drives the sealing disc into the oil outlet groove through the connecting pipe, where it is sealed by the third sealing ring, thus preventing oil leakage and achieving a self-sealing effect. The connection of this rotary joint has excellent self-sealing capability. When disassembly or accidentally disconnected, the internal oil will not splash and leak due to pressure, avoiding resource waste and environmental pollution. Attached Figure Description

[0011] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0012] In the attached diagram:

[0013] Figure 1 This is a schematic diagram of the dual-oil-cavity rotary joint structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the rotating sleeve of this utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of the rotating column of this utility model;

[0016] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0017] In the diagram: 1. Connector body; 2. Rotating column; 3. Flow channel; 4. Sealed bearing; 5. Sealing seat; 6. Sealing ring; 7. Rotating sleeve; 8. Flow cavity; 9. Oil inlet head; 10. Sealing disc; 11. Oil outlet groove; 12. Oil outlet pipe; 13. External thread; 14. Internal thread; 15. Butt sleeve; 16. Connecting pipe; 17. Opening; 18. Third sealing ring; 19. Mounting groove; 20. Pressure ring; 21. Spring; 22. First groove; 23. First sealing ring; 24. Second groove; 25. Second sealing ring; 26. Butt joint; 27. Sealing gasket. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] Depend on Figures 1 to 4 The present invention includes a connector body 1, a rotating column 2 fixedly mounted at one end of the connector body 1, two flow channels 3 formed inside the rotating column 2, a rotating sleeve 7 sleeved on the surface of the connector body 1, and the two ends of the rotating sleeve 7 and the rotating column 2 being rotatably connected by sealed bearings 4. Three sealing seats 5 are fixedly mounted parallel and equidistantly inside the rotating sleeve 7, and three sealing rings 6 are fixedly mounted parallel and equidistantly on the surface of the rotating column 2. The three sealing rings 6 are tightly fitted to the interior of the three sealing seats 5, and the three sealing seats 5 and the three sealing rings 6 are separated into two flow cavities 8. Both the upper and lower parts of the sleeve 7 are provided with oil outlet grooves 11. Oil outlet pipes 12 are fixedly installed on the surface of the rotating column 2 and at the ends of the two oil outlet grooves 11. One end of the inner wall of the two oil outlet pipes 12 is provided with an internal thread 14. A connector 26 is inserted into the inside of the oil outlet pipes 12. The surface of the two connectors 26 is provided with an external thread 13. The two connectors 26 are threadedly connected to the two oil outlet pipes 12 through the external thread 13 and the internal thread 14. A self-sealing component is provided between the inside of the two oil outlet pipes 12 and the two oil outlet grooves 11. An oil inlet head 9 is fixedly installed at one end of the connector body 1.

[0020] In use, the rotating column 2 on the connector body 1 can rotate along the inside of the rotating sleeve 7 through two sealed bearings 4; the oil enters the two flow channels 3 of the rotating column 2 through two oil inlets 9, and enters the two flow chambers 8 from the two flow channels 3. The oil in the two flow chambers 8 will be discharged through the self-sealing assembly and the two connectors 26.

[0021] When disassembling the two couplings 26, the operator rotates the couplings 26 and unscrews them through the engagement of the external thread 13 and the internal thread 14. Then, the oil outlet 11 is sealed by the self-sealing component to prevent oil leakage and achieve a self-sealing effect. The connection of this rotary joint has good self-sealing capability. When disassembly or accidental disconnection occurs, the internal oil will not splash and leak due to pressure, thus avoiding resource waste and environmental pollution.

[0022] The self-sealing assembly includes two mating sleeves 15 disposed between the two oil outlet pipes 12 and the two oil outlet grooves 11. A sealing gasket 27 is fixedly installed at one end of each of the two mating sleeves 15. One end of the mating joint 26 is mated to the inside of the two mating sleeves 15, and the two mating joints 26 are close to each other and abut against the two sealing gaskets 27 respectively. A sealing disc 10 is fixedly installed at the close end of each of the two mating sleeves 15 through a connecting pipe 16. The two sealing discs 10 are adapted to the two oil outlet grooves 11. A third sealing ring 18 is fixedly installed on the circumferential surface of each of the two sealing discs 10. Two openings 17 are symmetrically opened on the surface of each of the two connecting pipes 16.

[0023] An installation groove 19 is provided between the inner walls of the two oil outlet pipes 12 and the two oil outlet grooves 11. A pressure ring 20 is fixedly installed on the surface of the two mating sleeves 15. A spring 21 is sleeved in the middle of the surface of the two mating sleeves 15. The two ends of the two springs 21 are fixedly connected to the pressure ring 20 and the interior of the installation groove 19, respectively. Two first ring grooves 22 and two ring grooves 24 are respectively provided in the middle of the inner wall of the two oil outlet pipes 12 and the inner wall of the two oil outlet grooves 11. A first sealing ring 23 and a second sealing ring 25 are fixedly installed in the interior of the two first ring grooves 22 and the two second ring grooves 24, respectively.

[0024] The oil in the two flow chambers 8 will enter the two connecting pipes 16 through the two oil outlet grooves 11 and the two openings 17, and will be discharged through the two mating sleeves 15 and the two mating joints 26.

[0025] When the two connectors 26 are disassembled, the operator unscrews the connectors 26 and pushes the pressure ring 20 by the elastic force of the spring 21. The pressure ring 20 pushes the mating sleeve 15 to move outward inside the oil outlet pipe 12. When the mating sleeve 15 moves, it drives the sealing disc 10 into the oil outlet groove 11 through the connecting pipe 16 and seals it through the third sealing ring 18, thereby preventing oil leakage and achieving a self-sealing effect.

[0026] The sealing gasket 27 ensures the sealing between the connector 13 and the connector 15; the first sealing ring 23 and the second sealing ring 25 increase the sealing between the connector 26 and the mating sleeve 15 and the oil outlet pipe 12 and the oil outlet groove 1 to prevent oil leakage.

Claims

1. A dual-oil-cavity rotary joint, comprising a joint body (1), characterized in that: One end of the connector body (1) is fixedly installed with a rotating column (2). The rotating column (2) has two flow channels (3) inside. A rotating sleeve (7) is fitted on the surface of the connector body (1). Both ends of the rotating sleeve (7) and the rotating column (2) are rotatably connected by a sealed bearing (4). Three sealing seats (5) are fixedly installed in parallel at equal intervals inside the rotating sleeve (7). Three sealing rings (6) are fixedly installed in parallel at equal intervals on the surface of the rotating column (2). The three sealing rings (6) are tightly attached to the inside of the three sealing seats (5). The three sealing seats (5) and the three sealing rings (6) are separated into two flow cavities (8). The upper part of the rotating sleeve (7) and The lower part is provided with an oil outlet groove (11). An oil outlet pipe (12) is fixedly installed on the surface of the rotating column (2) and at the ends of the two oil outlet grooves (11). An internal thread (14) is provided on one end of the inner wall of the two oil outlet pipes (12). A connector (26) is inserted inside the oil outlet pipe (12). An external thread (13) is provided on the surface of the two connectors (26). The two connectors (26) are threaded to the two oil outlet pipes (12) through the external thread (13) and the internal thread (14). A self-sealing component is provided between the two oil outlet pipes (12) and the interior of the two oil outlet grooves (11). An oil inlet head (9) is fixedly installed on one end of the connector body (1).

2. The dual-oil-cavity rotary joint according to claim 1, characterized in that: The self-sealing assembly includes two mating sleeves (15) disposed between the two oil outlet pipes (12) and the two oil outlet grooves (11). A sealing gasket (27) is fixedly installed at one end of each of the two mating sleeves (15). One end of the mating joint (26) is mated to the inside of the two mating sleeves (15), and the two mating joints (26) are close to each other and respectively abut against the two sealing gaskets (27). A sealing disc (10) is fixedly installed at the two mating sleeves (15) through a connecting pipe (16), and the two sealing discs (10) are adapted to the two oil outlet grooves (11). A third sealing ring (18) is fixedly installed on the circumferential surface of each of the two sealing discs (10). Two openings (17) are symmetrically opened on the surface of each of the two connecting pipes (16).

3. A dual-oil-cavity rotary joint according to claim 2, characterized in that: An installation groove (19) is provided between the inner walls of the two oil outlet pipes (12) and the two oil outlet grooves (11). A pressure ring (20) is fixedly installed on the surface of the two mating sleeves (15). A spring (21) is sleeved in the middle of the surface of the two mating sleeves (15). The two ends of the two springs (21) are fixedly connected to the pressure ring (20) and the interior of the installation groove (19), respectively.

4. A dual-oil-cavity rotary joint according to claim 3, characterized in that: Two first grooves (22) and two second grooves (24) are respectively opened in the middle of the inner wall of the two oil outlet pipes (12) and the inner wall of the two oil outlet grooves (11). A first sealing ring (23) and a second sealing ring (25) are respectively fixedly installed inside the two first grooves (22) and the two second grooves (24).

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