A multi-channel rotary joint

Abstract

This utility model relates to the field of rotary joint technology, and in particular to a multi-channel rotary joint, comprising: a stationary part and a guide fluid connected to the stationary part; a fixed flow channel and a rotating flow channel are configured between the stationary part and the guide fluid, and a rotating body is rotatably connected to the outside of the guide fluid; the medium cavity is connected to the rotating flow channel, and the outside of the rotating body has an output port connected to the medium cavity. This utility model, by designing a fixed flow channel and a rotating flow channel inside the rotary joint, enables the medium to be transported from a stationary pipe to a rotating device, supporting the simultaneous transmission of multiple different media, and each channel is independent of each other and does not interfere with each other. When one end of the rotary joint is connected to a stationary pipe and the other end is connected to a rotating device, the medium enters the input port of the rotary joint under pressure, and then is transmitted to the corresponding part of the rotating device through the internal channel, realizing the supply of medium.

Description

Technical Field

[0001] This utility model relates to the field of rotary joint technology, and in particular to a multi-channel rotary joint. Background Technology

[0002] With the rapid development of industrial production towards automation, large-scale operation, and high speed, rotating equipment such as machine tools, metallurgical rolling mills, papermaking machines, and printing and dyeing machines are increasingly widely used in manufacturing. The rotating components of these machines need to be dynamically connected to static liquid, gas, and power supply systems to ensure the stable operation of core functions such as cooling, lubrication, and power transmission. Traditional connection methods struggle to balance efficient transmission and structural stability under complex operating conditions, easily leading to problems such as media leakage, pressure fluctuations, or signal interruptions, thus hindering further improvements in equipment performance.

[0003] Rotary joints, as key devices for solving the dynamic connection between rotating components and stationary systems, achieve continuous transmission of fluids, gases, or signals during rotation through their special structure. They also possess characteristics such as high temperature resistance, high pressure resistance, and corrosion resistance, significantly improving the operational reliability of industrial equipment. However, most rotary joints currently on the market adopt a single-channel design, which can only support the synchronous transmission of a single medium, making it difficult to meet the needs of modern industrial equipment for the parallel supply of multiple media such as coolant, lubricating oil, and compressed air.

[0004] Therefore, developing rotary joint technology with multi-channel integration capabilities has become an important direction for breaking through the bottleneck of industrial automation. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing rotary joints, which mostly adopt a single-channel design and can only support the synchronous transmission of a single medium, making it difficult to meet the needs of modern industrial equipment for the parallel supply of multiple media such as coolant, lubricating oil, and compressed air. Therefore, a multi-channel rotary joint is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a multi-channel rotary joint, including:

[0008] The stationary part and the fluid guide connected to the stationary part;

[0009] A fixed flow channel and a rotating flow channel are arranged between the stationary part and the guide fluid, and a rotating body is rotatably connected to the outside of the guide fluid;

[0010] The outer side of the guide fluid is formed with a partition, which separates a medium cavity inside the rotating body. The medium cavity is connected to the rotating flow channel, and the outer side of the rotating body has an output port that connects to the medium cavity.

[0011] Furthermore, the stationary part includes a stationary body;

[0012] The stationary body has several mounting surfaces on its outer periphery, and a fixed input port and a rotary input port that connect to the lower end face of the stationary body are provided on the end face of the mounting surfaces.

[0013] Furthermore, the guide fluid has a fixed guide hole that extends vertically through the body, and a rotating guide hole that extends from the upper end of the guide fluid to the outer side of its middle portion.

[0014] The fixed input port and the fixed guide hole are connected to form the fixed flow channel, and the rotary input port and the rotary guide hole are connected to form the rotary flow channel.

[0015] Furthermore, the stationary body and the fluid guide are connected by fasteners;

[0016] A first sealing element is also placed between the stationary body and the fluid guide, and an avoidance hole is provided on the end face of the first sealing element to avoid the fixed flow channel and the rotating flow channel.

[0017] Furthermore, the rotating body includes:

[0018] The upper swivel, connector, and lower swivel are secured by fasteners;

[0019] Both the upper and lower rotating rings are connected to the fluid guide via a rotating seal and rotate, and the output port is formed on the end face of the connector.

[0020] Furthermore, positioning ring protrusions are formed on the end faces of the upper and lower rotating rings near the connecting body, and inwardly narrowed ring openings are formed on both ends of the connecting body, with the positioning ring protrusions and the inwardly narrowed ring openings being inserted and adapted to each other.

[0021] Furthermore, the upper and lower rotating rings are also formed with sealing grooves on their end faces near the connector, and a second sealing element that fits the connector is installed in the sealing groove. The upper and lower rotating rings are also provided with reserved holes on their outer sides.

[0022] Furthermore, an inner groove is formed on the inner side of the connector, and a third sealing element is installed in the inner groove. The third sealing element fits and seals against the outer periphery of the partition.

[0023] Furthermore, both the upper and lower rotating rings have stepped positions formed inside, and the rotary seal is placed in the stepped positions;

[0024] Two locking elements are detachably connected to the outside of the fluid guide, and the two locking elements stop below the upper and lower rotary seals.

[0025] Furthermore, an inner recess adapted to the rotary seal is formed below the fluid guide, an inner locking member supporting the bottom of the lower rotary seal is formed on the inner side of the lower rotating ring, and the lower end of the stationary part stops on the upper side of the upper rotary seal.

[0026] The multi-channel rotary joint proposed in this utility model has the following advantages: By designing a fixed flow channel and a rotating flow channel inside the rotary joint, the medium can be transported from a stationary pipe to a rotating device. It can support the simultaneous transmission of multiple different media, and each channel is independent of the others and does not interfere with each other. When one end of the rotary joint is connected to a stationary pipe and the other end is connected to the rotating device, the medium enters the inlet of the rotary joint under pressure, and then is transmitted to the corresponding part of the rotating device through the internal channel, thereby achieving the supply of medium, reducing leakage and failure, improving the operating efficiency and reliability of the equipment, ensuring the continuity of the production process, and helping to improve product quality and reduce production costs. Attached Figure Description

[0027] Figure 1 This is a perspective view of the present utility model;

[0028] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0029] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0030] Figure 4 This is a schematic diagram of the fluid guiding structure of this utility model;

[0031] Figure 5 This is a cross-sectional view of the fluid guide of this utility model.

[0032] In the diagram: 1. Stationary part; 11. Stationary body; 12. Mounting surface; 13. Fixed inlet; 14. Rotary inlet; 15. First seal; 16. Clearance hole; 2. Flow guide; 21. Separator; 22. Fixed flow guide hole; 23. Rotary flow guide hole; 24. Locking element; 25. Inner narrowing opening; 26. Inner locking element; 3. Fixed flow channel; 4. Rotary flow channel; 5. Rotating body; 50. Reserved hole; 51. Medium cavity; 52. Output port; 53. Upper rotating ring; 531. Stepped position; 54. Connecting body; 541. Third seal; 55. Lower rotating ring; 56. Rotary seal; 57. Positioning ring protrusion; 58. Inner narrowing ring opening; 59. Second seal. Detailed Implementation

[0033] 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.

[0034] Reference Figure 1-5 As one embodiment of this utility model, a multi-channel rotary joint is disclosed. Specifically, the rotary joint includes a stationary part 1 and a fluid guide 2 connected to the stationary part 1. The stationary part 1 serves as a stationary portion for inputting the medium.

[0035] A fixed flow channel 3 and a rotating flow channel 4 are arranged between the stationary part 1 and the guide fluid 2, and a rotating body 5 is rotatably connected to the outside of the guide fluid 2;

[0036] The outer side of the guide fluid 2 is formed with a partition 21, which separates a medium cavity 51 inside the rotating body 5. The medium cavity 51 is connected to the rotating flow channel 4, and the outer side of the rotating body 5 has an output port 52 that connects to the medium cavity 51.

[0037] Of course, the specific number of the partition 21, fixed flow channel 3 and rotating flow channel 4 is not specifically limited in this utility model. Those skilled in the art will understand that when a single partition 21 is used in this embodiment, two medium cavities 51 will be separated inside the rotating body 5. Then, two output ports 52 are configured, and the two output ports 52 are respectively connected to the two medium cavities 51. At the same time, two rotating flow channels 4 should also be configured to provide fluid medium to the two medium cavities 51 respectively.

[0038] Similarly, when the partition 21 is set to two, three medium cavities 51 will be constructed inside the rotating body 5, and so on.

[0039] Furthermore, in this embodiment, the fixed flow channel 3 serves as a fixed output position, and it does not rotate when outputting the medium, so it can be used as a straight pipe connection.

[0040] Preferably, in this embodiment, the fixed flow channel 3 is configured as one, and the rotating flow channel 4 is configured as two, so as to form a multi-channel connector.

[0041] In some embodiments, the stationary part 1 in this invention includes a stationary body 11;

[0042] The stationary body 11 has several mounting surfaces 12 on its outer periphery. The mounting surfaces 12 are flat to facilitate the installation of water pipe connectors. The end face of the mounting surface 12 is provided with a fixed input port 13 and a rotary input port 14 that connect to the lower end face of the stationary body 11. Of course, the ends of the fixed input port 13 and the rotary input port 14 are both set as threaded ports. Thus, when installing water pipe connectors, the water pipe connectors can be directly installed and fixed by means of threaded connection.

[0043] In addition, the guide fluid 2 described in this utility model has a fixed guide hole 22 that runs through the top and bottom, and a rotating guide hole 23 that runs through the upper end of the guide fluid 2 to the outer side of its middle part;

[0044] The fixed input port 13 and the fixed guide hole 22 are connected to form the fixed flow channel 3, and the rotating input port 14 and the rotating guide hole 23 are connected to form the rotating flow channel 4.

[0045] As described above, in this embodiment, there are two rotating guide holes 23, which are located on both sides of the partition 21, for supplying fluid medium into the interior of the two medium chambers 51. It should be noted that the medium in this embodiment can be gas, liquid, oil or a mixture thereof. The multi-pass design of this utility model can meet the requirements for simultaneous delivery of different media.

[0046] Based on the above embodiments, in this embodiment, the stationary body 11 and the fluid guide 2 are connected by fasteners. Specifically, the fasteners in this embodiment are bolts, which pass through the stationary body 11 and are threadedly connected to the fluid guide 2. Of course, multiple bolts can be configured in this embodiment to ensure the stability of the fixation.

[0047] A first sealing element 15 is also placed between the stationary body 11 and the fluid guide 2. The end face of the first sealing element 15 is provided with a clearance hole 16 to avoid the fixed flow channel 3 and the rotating flow channel 4.

[0048] In this embodiment, the first sealing element 15 is set as a sealing gasket. When the stationary body 11 and the fluid guide 2 are connected, the sealing gasket is used to improve the sealing performance between the two. In addition, in order to ensure the continuity of the pipeline, in this embodiment, a clearance hole 16 is opened on the end face of the first sealing element 15 to ensure that the fixed flow channel 3 and the rotating flow channel 4 can be smoothly connected. That is, the clearance hole 16 is directly facing the fixed flow channel 3 and the rotating flow channel 4, and its number can also be designed as three according to the above description.

[0049] In some embodiments, the rotating body 5 of this invention includes:

[0050] The upper rotating ring 53, the connecting body 54, and the lower rotating ring 55 are fixed by fasteners. In this embodiment, the fasteners can be set as bolt and nut assemblies. The ends of the bolts are sequentially passed through the upper rotating ring 53, the connecting body 54, and the lower rotating ring 55 and fastened by nuts to combine the upper rotating ring 53, the connecting body 54, and the lower rotating ring 55 into a whole. Of course, in this embodiment, the bolt and nut assemblies can be configured as three.

[0051] The upper rotating ring 53 and the lower rotating ring 55 are both connected and rotated through the rotating seal 56 and the fluid guide 2, and the output port 52 is formed on the end face of the connector 54.

[0052] Specifically, in this embodiment, the rotary seal 56 is configured as a waterproof sealing bearing to achieve a sealing effect on both ends of the rotating body 5. At the same time, the waterproof sealing bearing can withstand the radial and axial forces generated during rotation, ensuring that the rotating part can rotate smoothly and steadily, while ensuring rotational accuracy and reducing wear and vibration, so that the rotary joint can maintain a good working condition during long-term operation.

[0053] Furthermore, in this utility model, positioning ring protrusions 57 are formed on the end faces of the upper rotating ring 53 and the lower rotating ring 55 near the connecting body 54, and inwardly narrowed ring openings 58 are formed on both ends of the connecting body 54. The positioning ring protrusions 57 and the inwardly narrowed ring openings 58 are plugged into each other and adapted. The design of the positioning ring protrusions 57 and the inwardly narrowed ring openings 58 is used to improve the accuracy of their installation and docking.

[0054] In addition, in order to ensure the sealing of the connection between each rotating ring and the connecting body 54, in this embodiment, the upper rotating ring 53 and the lower rotating ring 55 are also formed with sealing ring grooves on the end faces near the connecting body 54. A second sealing element 59 that fits the connecting body 54 is installed in the sealing ring groove. A reserved hole 50 is also provided on the outer side of the upper rotating ring 53 and the lower rotating ring 55.

[0055] Specifically, the reserved hole 50 described in this embodiment can be used for subsequent installation of sensors, such as water pressure sensors. Of course, the sensor also needs to be kept sealed after it is installed in the reserved hole 50.

[0056] Based on the above embodiments, in this utility model, an inner ring groove is also formed on the inner side of the connecting body 54, and a third sealing member 541 is installed in the inner ring groove. The third sealing member 541 and the outer periphery of the partition 21 are fitted and sealed.

[0057] In this embodiment, both the second sealing element 59 and the third sealing element 541 are configured as sealing rings. The second sealing element 59 is used to improve the connection sealing between each rotating ring and the connecting body 54, and the third sealing element 541 is used to ensure the rotational sealing between the partition 21 and the rotating body 5. By adopting the design of multiple sealing structures, the sealing between the rotating part and the stationary part is achieved. The sealing rings and sealing gaskets mentioned above can be made of wear-resistant and corrosion-resistant rubber materials, such as fluororubber or nitrile rubber, which can maintain good sealing performance under high-speed rotation and certain pressure to prevent media leakage.

[0058] Based on the above embodiments, the upper rotating ring 53 and the lower rotating ring 55 of this utility model are both formed with stepped positions 531 inside, and the rotating seal 56 is placed in the stepped positions 531.

[0059] Two locking members 24 are detachably connected to the outside of the fluid guide 2, and the two locking members 24 stop below the upper and lower rotating seals 56.

[0060] In some optional embodiments, the locking member 24 described in this utility model is a retaining spring, and annular grooves are formed on both the upper and lower sides of the fluid guide 2. The retaining spring is engaged in the annular grooves. Specifically, in this embodiment, the fluid guide 2 can be set as a columnar body.

[0061] Furthermore, in this utility model, the lower part of the guide fluid 2 is formed with an inner recess 25 adapted to the rotary seal 56, the inner side of the lower rotating ring 55 is formed with an inner locking member 26 supporting the bottom of the lower rotary seal 56, and the lower end of the stationary part 1 stops on the upper side of the upper rotary seal 56.

[0062] Similarly, in this embodiment, the inner locking member 26 is also set as a retaining spring, and an annular groove is also formed in the inner hole of the lower rotating ring 55. The retaining spring is engaged in the annular groove. Through the design of the inner constriction 25, the rotating seal 56 and the locking member 24, the lower stop positioning of the entire fluid guide 2 can be achieved. At the same time, the upper stop limiting of the fluid guide 2 is achieved through the locking member 24, the rotating seal 56 and the stationary part 1. This design can greatly improve the ease of assembly of the entire connector.

[0063] In summary, this utility model, by designing a fixed flow channel 3 and a rotating flow channel 4 inside the rotary joint, enables the medium to be transported from a stationary pipe to a rotating device. It can support the simultaneous transmission of multiple different media, and each channel is independent of the others and does not interfere with each other. When one end of the rotary joint is connected to the stationary pipe and the other end is connected to the rotating device, the medium enters the inlet of the rotary joint under pressure, and then is transmitted to the corresponding part of the rotating device through the internal channels, thereby achieving the supply of the medium, reducing leakage and failure, improving the operating efficiency and reliability of the equipment, ensuring the continuity of the production process, and helping to improve product quality and reduce production costs.

[0064] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-pass rotary union, characterized by, include: The stationary part (1) and the fluid guide (2) connected to the stationary part (1); A fixed flow channel (3) and a rotating flow channel (4) are arranged between the stationary part (1) and the guide fluid (2), and a rotating body (5) is rotatably connected to the outside of the guide fluid (2). The outer side of the guide fluid (2) is formed with a partition (21), which separates a medium cavity (51) inside the rotating body (5). The medium cavity (51) is connected to the rotating flow channel (4), and the outer side of the rotating body (5) has an output port (52) that connects to the medium cavity (51).

2. A multi-channel rotary joint according to claim 1, characterized in that: The stationary part (1) includes a stationary body (11); The stationary body (11) has several mounting surfaces (12) on its outer periphery. The mounting surfaces (12) are provided with a fixed input port (13) and a rotary input port (14) that connect to the lower end face of the stationary body (11).

3. A multi-channel rotary joint according to claim 2, characterized in that: The guide fluid (2) has a fixed guide hole (22) that runs through the top and bottom, and a rotating guide hole (23) that runs through the upper end of the guide fluid (2) to the outer side of its middle part. The fixed input port (13) and the fixed guide hole (22) are connected to form the fixed flow channel (3), and the rotating input port (14) and the rotating guide hole (23) are connected to form the rotating flow channel (4).

4. A multi-channel rotary joint according to claim 2, characterized in that: The stationary body (11) and the fluid guide (2) are connected by fasteners; A first sealing element (15) is also placed between the stationary body (11) and the fluid guide (2). The end face of the first sealing element (15) is provided with a clearance hole (16) to avoid the fixed flow channel (3) and the rotating flow channel (4).

5. A multi-channel rotary joint according to claim 1, characterized in that: The rotating body (5) includes: The upper swivel (53), the connector (54), and the lower swivel (55) are fixed by fasteners. The upper rotating ring (53) and the lower rotating ring (55) are connected and rotated by a rotating seal (56) and the fluid guide (2), and the output port (52) is formed on the end face of the connector (54).

6. A multi-channel rotary joint according to claim 5, characterized in that: Positioning ring protrusions (57) are formed on the end faces of the upper rotating ring (53) and the lower rotating ring (55) near the connector (54), and inwardly narrowed ring openings (58) are formed on both ends of the connector (54). The positioning ring protrusions (57) and the inwardly narrowed ring openings (58) are inserted and adapted to each other.

7. A multi-channel rotary joint according to claim 5, characterized in that: The upper rotating ring (53) and the lower rotating ring (55) are also formed with sealing ring grooves on the end faces of the connector (54), and a second sealing element (59) that fits the connector (54) is installed in the sealing ring groove. The upper rotating ring (53) and the lower rotating ring (55) are also provided with reserved holes (50) on their outer sides.

8. A multi-channel rotary joint according to claim 5, characterized in that: An inner ring groove is also formed on the inner side of the connector (54), and a third seal (541) is installed in the inner ring groove. The third seal (541) and the outer periphery of the partition (21) are fitted and sealed.

9. A multi-channel rotary joint according to claim 5, 6, 7 or 8, characterized in that: The upper rotating ring (53) and the lower rotating ring (55) are both formed with stepped positions (531), and the rotating seal (56) is placed in the stepped positions (531); Two locking members (24) are detachably connected to the outside of the fluid guide (2), and the two locking members (24) stop below the upper and lower rotating seals (56).

10. A multi-channel rotary joint according to claim 9, characterized in that: The lower part of the guide fluid (2) is formed with an inner recess (25) adapted to the rotary seal (56), and the inner side of the lower rotating ring (55) is formed with an inner locking member (26) supporting the bottom of the lower rotary seal (56). The lower end of the stationary part (1) stops on the upper side of the upper rotary seal (56).

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