A hydraulically driven rotary seal joint

Abstract

The application relates to the technical field of sealing joints, in particular to a hydraulic driving rotary sealing joint which comprises a rotary sealing joint body and a hydraulic motor, and the lower end of the rotary sealing joint body is bolted with an output gear connecting plate. The hydraulic driving rotary sealing joint can change the gap between the gear rack and the rotary sealing joint body through the expandable structure design, so that the rotary sealing joint body can be applied to rotary sealing joint bodies with different structures, and the applicability is greatly improved. The hydraulic driving rotary joint device is used to replace the three-dimensional joint operated by people on the ship, the rotary sealing joint body is rotated under the hydraulic driving, the ship manifold flange is accurately docked, and thus the unattended automatic docking of the loading and unloading arm to the ship is realized.

Description

Technical Field

[0001] This invention relates to the field of sealing joint technology, and in particular to a hydraulically driven rotary sealing joint. Background Technology

[0002] Specialized equipment for fluid loading and unloading, such as marine loading and unloading arms for LNG, oil, and chemical media, uses rotary sealing joints as important components for fluid transport pipelines on these arms. These joints enable the pipelines to rotate while preventing fluid leakage.

[0003] Traditional ship loading and unloading requires manual operation of the three-dimensional joint to align the quick-connector with the ship's manifold. Therefore, the rotary joint without power cannot meet the needs of automatic ship loading and unloading by the loading arm. Moreover, most rotary sealing joints on the market are simply for angle adjustment and cannot perform status detection during the angle adjustment process. This results in the need for regular manual inspection and maintenance of the joint, which is very costly. In addition, the current joints have limited applicability. Summary of the Invention

[0004] The technical problem that this invention aims to solve is that commercially available rotary sealing joints have limited functionality and cannot perform status detection during angle adjustment, resulting in the need for regular manual inspection and maintenance, which leads to high usage costs and limited applicability.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a hydraulically driven rotary sealing joint, including a rotary sealing joint body and a hydraulic motor. An output gear connecting plate is bolted to the lower end of the rotary sealing joint body. An arc-shaped output rack is fixedly mounted on the lower surface of the output gear connecting plate. A hydraulic motor connecting plate for mounting the hydraulic motor is bolted to the upper end of the rotary sealing joint body. A gear frame is fixedly mounted on the lower surface of the hydraulic motor connecting plate. The hydraulic motor is connected to the output gear connecting plate through an outer transmission gear set inside the gear frame. A lateral rolling monitoring module is installed on the side wall of the gear frame near the end of the rotary sealing joint body.

[0006] The outer transmission gear set includes a bottom drive gear that meshes with the outer tooth surface of the output rack, an upper synchronous gear that is coaxially mounted above the bottom drive gear via a slow shaft, an input gear that meshes with the upper synchronous gear, and a fast shaft that is axially fixed inside the input gear. The fast shaft is coaxially connected to the lower drive shaft of the hydraulic motor via a hydraulic motor coupling.

[0007] An IP67 explosion-proof encoder is axially fixed to the top of the slow shaft via an encoder bracket.

[0008] The output gear connecting plate includes a side mounting plate with a fan-shaped structure and an external extension plate that is bolted to the side mounting plate. The side mounting plate has an external adjustment groove with a fan-shaped structure for bolting the external extension plate on the outer side of its lower surface. Both the side mounting plate and the external extension plate have a plurality of circular assembly through holes inside.

[0009] The gear frame consists of an inverted L-shaped lateral mounting frame fixed to the lower surface of the hydraulic motor connecting plate, a first transverse assembly plate fixed to the middle of the outer side of the lateral mounting frame, and a second transverse assembly plate fixed to the lower end of the lateral mounting frame.

[0010] The lateral mounting frame has two horizontally arranged strip transition openings and an upper assembly slot and a lower assembly slot connected to the strip transition openings.

[0011] The lateral rolling monitoring module includes a side guide wheel movably installed inside the strip transition port, a lateral assembly shaft axially fixed on the side guide wheel and at the lower wheel core position, and a lateral pressure module fixed on the inner sides of the upper and lower assembly slots.

[0012] The outer side of the lateral mounting frame is bolted with a lateral limiting sleeve at the external opening position of the upper and lower mounting slots.

[0013] An arc-shaped sealing cover is fixedly fitted on the outer side of the side mounting frame away from the rotary sealing joint body.

[0014] An external protective shell is fitted and fixed to the outer side of the gear frame.

[0015] The beneficial effects of this invention are:

[0016] (1) The hydraulically driven rotary sealing joint of the present invention adopts an expandable structural design, which can change the gap between the gear frame and the rotary sealing joint body, so that it can be used for rotary sealing joint bodies with different structures, greatly improving its applicability.

[0017] (2) The hydraulically driven rotary joint device replaces the three-dimensional joint operated by a person on the ship. This device makes the rotary sealing joint body rotate under hydraulic drive, accurately docking with the ship manifold flange, thereby realizing unmanned automatic ship loading and unloading by the loading and unloading arm.

[0018] (3) A lateral rolling monitoring module is installed on the side wall of the gear frame near the rotary seal joint body. It can monitor the assembly status of the rotary seal joint body simultaneously when it rotates, and can monitor its sealing and operating status in real time, eliminating the need for manual maintenance and reducing the cost of later use.

[0019] (4) The detachable structure design facilitates both initial installation and subsequent disassembly.

[0020] (5) By adopting a side-mounted installation design, external control and assembly can be facilitated. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a top view of the present invention.

[0023] Figure 2 This is a bottom view of the present invention.

[0024] Figure 3 This is a schematic diagram of the lateral internal structure of the present invention. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Figure 1 , Figure 2 and Figure 3 The hydraulically driven rotary sealing joint shown includes a rotary sealing joint body 1 and a hydraulic motor 2. An output gear connecting plate 3 is bolted to the lower end of the rotary sealing joint body 1. An arc-shaped output rack 4 is fixedly mounted on the lower surface of the output gear connecting plate 3. A hydraulic motor connecting plate 5 for mounting the hydraulic motor 2 is bolted to the upper end of the rotary sealing joint body 1. A gear frame 6 is fixedly mounted on the lower surface of the hydraulic motor connecting plate 5. The hydraulic motor 2 is connected to the output gear connecting plate 3 through an outer transmission gear set inside the gear frame 6. A lateral rolling monitoring module is installed on the side wall of the gear frame 6 near the end of the rotary sealing joint body 1.

[0028] To facilitate lateral transmission, the outer transmission gear set includes a bottom drive gear 7 that meshes with the outer tooth surface of the output rack 4, an upper synchronous gear 9 that is coaxially mounted above the bottom drive gear 7 via a slow speed shaft 8, an input gear 10 that meshes with the upper synchronous gear 9, and a fast shaft 11 that is axially fixed inside the input gear 10. The fast shaft 11 is coaxially connected to the lower drive shaft of the hydraulic motor 2 via a hydraulic motor coupling.

[0029] For ease of control, an IP67 explosion-proof encoder 14 is axially fixed to the top of the slow shaft 8 via an encoder bracket 13.

[0030] The hydraulic motor 2 is fixed to the inner ring of the rotary sealing joint body 1 via the hydraulic motor connecting plate 5. The output rack 4 is fixed to the outer ring of the rotary sealing joint body 1 via the output gear connecting plate 3. A hydraulic motor coupling connects the hydraulic motor 2 to the outer transmission gear set for speed reduction, transmitting power to the inner ring of the rotary sealing joint body 1. An IP67 explosion-proof encoder 14 is installed to provide feedback on the output speed and precise positioning of the quick-connect coupling (QCDC). This allows the camera to capture the position, and the program to control the hydraulic motor 2, ensuring the quick-connect coupling accurately docks with the ship's manifold flange.

[0031] To broaden its applicability, the output gear connecting plate 3 includes a side mounting plate 31 with a fan-shaped structure and an external extension plate 32 that is bolted to the side mounting plate 31. The side mounting plate 31 has an external adjustment groove 33 with a fan-shaped structure for bolting the external extension plate 32 on its lower outer surface. Both the side mounting plate 31 and the external extension plate 32 have 16 circular assembly through holes 34 inside.

[0032] The inner end of the outer extension plate 32 is inserted into the outer adjustment groove 33, and then fixed by bolts through the circular assembly through hole 34, thereby fixing the lateral mounting plate 31 and the outer extension plate 32.

[0033] To facilitate assembly, the gear frame 6 consists of an inverted L-shaped lateral mounting frame 61 fixed to the lower surface of the hydraulic motor connecting plate 3, a first transverse mounting plate 62 fixed to the middle of the outer side of the lateral mounting frame 61, and a second transverse mounting plate 63 fixed to the lower end of the lateral mounting frame 61.

[0034] To facilitate lateral assembly, the lateral mounting frame 61 has two horizontally arranged strip transition openings 15 and an upper assembly slot and a lower assembly slot connected to the strip transition openings 15.

[0035] To facilitate the monitoring of the lateral extrusion pressure on the side guide wheel 16, the lateral rolling monitoring module includes the side guide wheel 16 movably installed inside the strip transition port 15, the lateral assembly shaft 17 axially fixed on the side guide wheel 16 at the lower end wheel core position, and the lateral pressure module 18 fixed on the inner side of the upper and lower assembly slots.

[0036] By monitoring the compressive force of the lateral assembly shafts at the upper and lower ends of the side-mounted guide wheel 16, the assembly status of the sealing joint body 1 can be quickly determined.

[0037] Marine loading and unloading arms are specialized devices used at port terminals to connect pipelines to ships for loading and unloading liquids. The sealing joint body 1 is a crucial component of the fluid transport pipeline on the loading and unloading arm. One section of pipeline is connected to the inner ring of the sealing joint body 1 via a flange, and another section is connected to the outer ring via a flange. The inner and outer rings are equipped with raceways filled with steel balls, allowing them to rotate relative to each other. The inner and outer rings are separated by a sealing ring, providing a seal. With increasing societal demand for automation in loading and unloading arms, the requirement is for unmanned operation of these arms for receiving and unloading ships.

[0038] To prevent the lateral assembly shaft 17 from coming loose, a lateral limiting sleeve 19 is bolted to the outer side of the lateral mounting frame 61 at the external opening positions of the upper and lower assembly slots.

[0039] The lateral limiting sleeve 19 limits the lateral assembly shaft 17 from the outer opening positions of the upper and lower assembly slots.

[0040] To prevent impurities on the surface of the rotary seal joint body 1 from entering the gear frame 6, an arc-shaped sealing cover 20 is fixedly mounted on the outer side of the side mounting frame 61 away from the rotary seal joint body 1.

[0041] To enhance external protection capabilities, an external protective shell 21 is fitted and fixed to the outer side of the gear frame 6.

[0042] The outer protective housing 21 has an integral lateral mounting frame 22 on the inner side corresponding to the positions of the first transverse mounting plate 62 and the second transverse mounting plate 63. The outer protective housing 21 is fixedly connected to the outer side of the gear frame 6 by the lateral mounting frame 22 through the first transverse mounting plate 62 and the second transverse mounting plate 63.

[0043] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A hydraulically driven rotary sealing joint, comprising a rotary sealing joint body (1) and a hydraulic motor (2), characterized in that: The rotary sealing joint body (1) is bolted to the lower end of an output gear connecting plate (3). An arc-shaped output rack (4) is fixedly mounted on the lower surface of the output gear connecting plate (3). The rotary sealing joint body (1) is bolted to the upper end of a hydraulic motor connecting plate (5) for mounting a hydraulic motor (2). A gear frame is fixedly mounted on the lower surface of the hydraulic motor connecting plate (5). The hydraulic motor (2) is connected to the output gear connecting plate (3) via an outer transmission gear set inside the gear frame. A lateral rolling monitoring module is installed on the side wall of the rotating sealing joint body (1) near the frame; the output gear connecting plate (3) includes a fan-shaped side mounting plate (31) and an external extension plate (32) that is bolted to the side mounting plate (31) by bolts. The side mounting plate (31) has an external adjustment groove (33) with a fan-shaped structure for bolting the external extension plate (32) on the outer side of its lower surface. Both the side mounting plate (31) and the external extension plate (32) have a plurality of circular assembly through holes (34) inside. The gear frame includes an inverted L-shaped lateral mounting frame (61) fixed to the lower surface of the hydraulic motor connecting plate (5). The lateral mounting frame (61) has two horizontally arranged strip transition openings (15) and an upper assembly slot and a lower assembly slot connected to the strip transition openings (15). The lateral rolling monitoring module includes a side guide wheel (16) movably installed inside the strip transition port (15), a lateral assembly shaft (17) axially fixed on the side guide wheel (16) at the lower end wheel core position, and a lateral pressure module (18) fixed on the inner side of the upper and lower assembly slots.

2. The hydraulically driven rotary sealing joint according to claim 1, characterized in that: The outer transmission gear set includes a bottom drive gear (7) that meshes with the outer tooth surface of the output rack (4), an upper synchronous gear (9) that is coaxially mounted above the bottom drive gear (7) via a slow shaft (8), an input gear (10) that meshes with the upper synchronous gear (9) for transmission, and a fast shaft (11) that is axially fixed inside the input gear (10). The fast shaft is coaxially connected to the lower drive shaft of the hydraulic motor (2) via a hydraulic motor coupling.

3. A hydraulically driven rotary sealing joint according to claim 2, characterized in that: The top of the slow shaft (8) is axially fixed with an IP67 explosion-proof encoder (14) via an encoder bracket (13).

4. The hydraulically driven rotary sealing joint according to claim 1, characterized in that: The gear frame also includes a first transverse mounting plate (62) fixed to the middle of the outer side of the lateral mounting frame (61) and a second transverse mounting plate (63) fixed to the lower end of the lateral mounting frame (61).

5. A hydraulically driven rotary sealing joint according to claim 1, characterized in that: The lateral mounting frame (61) has a lateral limiting sleeve (19) bolted to the outer side of the upper and lower mounting slots at the external opening positions.

6. A hydraulically driven rotary sealing joint according to claim 4, characterized in that: An arc-shaped sealing cover (20) is fixedly mounted on the outer side of the side mounting frame (61) away from the rotary sealing joint body (1).

7. A hydraulically driven rotary sealing joint according to claim 4, characterized in that: An external protective shell (21) is fitted and fixed on the outer side of the gear frame.

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