Rotary joint

Abstract

The utility model discloses a rotary joint which comprises a middle column, rotary bodies and fixing parts, the middle column is axially overlapped with multiple layers of rotary bodies, each layer of rotary body is rotatably sleeved on the middle column, the fixing parts are arranged on the outer surface of the rotary body, and the multiple layers of rotary bodies are locked through the fixing parts and synchronously rotate; according to the scheme, the adjacent rotating bodies are not additionally locked through screws and are only simply stacked, the multiple layers of rotating bodies synchronously rotate and depend on the fixing pieces arranged on the outer surfaces of the rotating bodies, and the scheme has the advantages of being convenient to mount, dismount and maintain.

Description

Technical Field

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

[0002] A rotary joint is typically used to address the fluid transfer needs of rotating equipment, helping the equipment to transport various media such as gases or liquids. In existing technology, a rotary joint usually includes a central column and multiple rotating bodies. Corresponding screw holes are provided inside adjacent rotating bodies, and adjacent rotating bodies are locked together by screws. When connected to the pipeline of the rotating equipment, the multiple rotating bodies rotate synchronously. Using the rotary joint in the existing technology, because adjacent rotating bodies are locked together by screws, in later maintenance, it is necessary to remove the screws on this rotating body, then remove this rotating body, and then remove the screws on the next rotating body. This process of removing each rotating body and screw is repeated, making the disassembly steps cumbersome. Similarly, the installation steps of the rotary joint are also cumbersome, making it inconvenient for the installation, maintenance, and repair of the rotary joint. Summary of the Invention

[0003] To achieve the above objectives, the inventors provide a rotary joint, comprising a central column, rotating bodies, and a fixing member. The central column has multiple layers of the rotating bodies stacked axially, and each layer of the rotating bodies is rotatably sleeved on the central column. The fixing member is disposed on the outer surface of the rotating bodies, and the multiple layers of rotating bodies are locked together by the fixing member and rotate synchronously.

[0004] As a preferred structure of this utility model, it further includes an upper rotating component and a lower rotating component, and the rotating body is rotatably connected to the intermediate column through the upper rotating component and the lower rotating component;

[0005] The upper rotating assembly includes a cover and a bearing. The cover is fixed to the top of the intermediate column. The bearing is sleeved on the intermediate column and located between the cover and the rotating body. The cover and the rotating body are provided with mounting grooves on the side adjacent to the bearing. The cover and the mounting grooves of the rotating body are joined together to form a mounting cavity for mounting the bearing. A rotation gap is provided between the cover and the rotating body.

[0006] The lower rotating assembly includes a bearing housing and a bearing. Both the bearing housing and the bearing are sleeved on the bottom of the intermediate column. The bearing is located between the bearing housing and the rotating body. The bearing housing and the rotating body are provided with mounting grooves on the side adjacent to the bearing. The mounting grooves of the bearing housing and the rotating body are joined together to form a mounting cavity for mounting the bearing. A rotation gap is provided between the bearing housing and the rotating body.

[0007] As a preferred structure of this utility model, the intermediate column includes a liquid inlet interface and a liquid inlet channel. Multiple liquid inlet channels are arranged axially inside the intermediate column, and the liquid inlet channels are connected to external pipelines through the liquid inlet interface.

[0008] As a preferred structure of this utility model, the rotating body includes a rotating chamber and an output interface. The rotating body is sleeved on the intermediate column and forms a rotating chamber between the rotating body and the outer surface of the intermediate column. The output interface is located on the outer surface of the rotating body. The rotating chamber is connected to the liquid inlet channel, and the output interface is connected to the rotating chamber.

[0009] As a preferred structure of this utility model, the rotating body further includes a sealing groove and a sealing ring. Each layer of the rotating body is provided with at least two sealing grooves. The rotating chamber is located between the sealing grooves. The sealing ring is installed in the sealing groove. A sliding gap is provided between the sealing ring and the sealing groove. At least two contact protrusions are provided on the sealing ring. One contact protrusion is in contact with the outer surface of the intermediate column, and the other contact protrusion is in contact with the inner surface of the sealing groove.

[0010] As a preferred structure of this utility model, the sealing ring of the rotating body on the side adjacent to the upper rotating component is in contact with the top or bottom surface of the inner surface of the sealing groove.

[0011] As a preferred structure of this utility model, the fixing member is disposed on the surface of the rotating body and fixed to each layer of the rotating body.

[0012] As a preferred structure of this utility model, each layer of the rotating body has a fixing groove on its surface, the fixing groove is adapted to the fixing member, and the fixing member is disposed in the fixing groove.

[0013] As a preferred structure of this utility model, it further includes a support, which includes a support body and a support connector. The support body includes a support through hole, which is disposed on the support body and coaxial with the intermediate column. The intermediate column passes through the support through hole and is disposed on the support connector. The bearing seat is sleeved on the intermediate column and disposed on the support body. The support connector includes a liquid inlet channel and a liquid inlet interface, and the liquid inlet channel of the support connector is connected to the liquid inlet channel of the intermediate column.

[0014] As a preferred structure of this utility model, the support joint is provided with liquid inlet ports on both its side and bottom surfaces, and the liquid inlet channel of the support joint is connected to an external pipeline through the liquid inlet ports of the support joint.

[0015] Unlike existing technologies, the above technical solution achieves the following beneficial effects:

[0016] (1) The rotary joint of this solution adopts a modular design, which can meet the individual transmission of different media and finally be stacked together to form a hybrid rotary joint. The fixed method of the rotary joint module design of this solution is different from the existing technology where each adjacent rotating body is locked with screws and finally installed on the middle column by bearing rotation. Although both are series compression forms, there is no additional screw or other locking device between the adjacent rotating bodies in this solution. They are simply stacked and pressed down by their own weight. The side is fixed to ensure that there is no displacement between the rotating bodies. They are installed on the middle column by rotating the upper and lower rotating components. This modular fixing method is very convenient for both installation and maintenance. During maintenance, only the fixing device on the outer surface of the rotating body needs to be removed, which greatly increases the maintenance efficiency and eliminates the need to remove screws layer by layer. The manufacturing material of each rotating body in this solution can also be adjusted according to the different transmission media to ensure the service life of the rotating body.

[0017] (2) The rotary joint of this solution sets the liquid inlet at the bottom of the intermediate column. Compared with the prior art, where the liquid inlet is installed on the side of one of the rotating bodies, the liquid inlet of the rotary joint is usually small due to the limitation of the number of pipelines and the installation area. By setting the liquid inlet at the bottom of the intermediate column, the liquid inlet can be designed to be larger with the same number of interfaces. The arrangement between interfaces is more reasonable and the space utilization is higher. Since the rotary joint of this solution simply stacks the rotating bodies on the intermediate column, it also has the advantages of being able to adjust the interface position faster and flexibly combine and use it according to the actual application requirements. Attached Figure Description

[0018] Figure 1 A perspective view of the rotary joint described in the specific embodiment;

[0019] Figure 2 This is a schematic diagram of the rotary joint structure described in a specific embodiment;

[0020] Figure 3 This is a schematic diagram of the rotating body structure of the rotary joint as described in a specific embodiment;

[0021] Figure 4 This is a schematic diagram of the rotary joint support structure described in a specific embodiment;

[0022] Figure 5 This is a schematic diagram of the structure at point A of the rotary joint described in the specific implementation method;

[0023] Figure 6 This is a schematic diagram of the structure at point B of the rotary joint as described in the specific implementation method;

[0024] Figure 7 This is a top view of the rotary joint described in a specific embodiment.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Intermediate column; 2. Rotating body; 201. Rotating chamber; 202. Output interface; 203. Sealing groove; 204. Sealing ring; 2041. Contact protrusion; 3. Fixing component; 301. Fixing groove; 4. Upper rotating assembly; 401. Pressure cap; 5. Lower rotating assembly; 501. Bearing seat; 6. Support; 601. Support body; 6011. Support through hole; 602. Support joint; 7. Mounting cavity; 8. Liquid inlet channel; 9. Liquid inlet interface; 10. Bearing; 11. Rotation clearance; 12. Sliding clearance. Detailed Implementation

[0027] To explain in detail the technical content, structural features, objectives, and effects of the technical solution, the following description is provided in conjunction with specific embodiments and accompanying drawings.

[0028] like Figure 1-2 As shown, this embodiment provides a rotary joint, including a central column 1, rotating bodies 2, and a fixing member 3. Multiple rotating bodies 2 are stacked axially on the central column 1, with each layer of rotating body 2 rotatably fitted onto the central column 1. The fixing member 3 is located on the outer surface of the rotating bodies 2. The multiple rotating bodies 2 are locked together by the fixing member 3 and rotate synchronously. This rotary joint adopts a modular design, which can meet the needs of individual transmission of different media. The rotating bodies 2 are simply stacked and connected in series with a compression mechanism. There are no additional locking devices between adjacent rotating bodies 2. Compared with existing technologies, this modular fixing method makes disassembly and maintenance more convenient.

[0029] like Figure 1-2 , Figure 5 As shown, in this embodiment, it also includes an upper rotating assembly 4 and a lower rotating assembly 5. The rotating body 2 is rotatably connected to the intermediate column 1 through the upper rotating assembly 4 and the lower rotating assembly 5. The upper rotating assembly 4 includes a pressure cap 401 and a bearing 10. The pressure cap 401 is fixedly locked to the top of the intermediate column 1 by screws. The bearing 10 is sleeved on the intermediate column 1 and located between the pressure cap 401 and the rotating body 2. The pressure cap 401 and the rotating body 2 are provided with mounting grooves on the side adjacent to the bearing 10. The mounting grooves of the pressure cap 401 and the rotating body 2 are combined to form a mounting cavity 7. For mounting bearing 10, a rotation gap 11 is provided between the pressure cap 401 and the rotating body 2; the lower rotating assembly 5 includes a bearing seat 501 and a bearing 10, both of which are sleeved on the bottom of the intermediate column 1. The bearing 10 is located between the bearing seat 501 and the rotating body 2. The bearing seat 501 and the rotating body 2 are each provided with a mounting groove on the side adjacent to the bearing 10. The mounting grooves of the bearing seat 501 and the rotating body 2 are combined to form a mounting cavity 7 for mounting the bearing 10. A rotation gap 11 is provided between the bearing seat 501 and the rotating body 2.

[0030] like Figure 1-2As shown, in this embodiment, the intermediate column 1 includes a liquid inlet interface 9 and a liquid inlet channel 8. Multiple liquid inlet channels 8 are arranged axially inside the intermediate column 1. The liquid inlet channels 8 are connected to the pipeline of the external rotating equipment through the liquid inlet interface 9. In this embodiment, the diameter of the liquid inlet channel 8 and the liquid inlet interface 9 can be adjusted according to actual production needs.

[0031] like Figure 1-3 As shown, in this embodiment, the rotating body 2 includes a rotating chamber 201 and an output interface 202. The rotating body 2 is sleeved on the intermediate column 1 and forms a rotating chamber 201 between it and the outer surface of the intermediate column 1. The output interface 202 is located on the outer surface of the rotating body 2. The rotating chamber 201 is connected to the liquid inlet channel 8, and the output interface 202 is connected to the rotating chamber 201. In this embodiment, each layer of rotating body 2 has a corresponding liquid inlet channel 8 on the intermediate column 1, and each layer of rotating body 2 can transmit a different medium.

[0032] like Figure 1-2 As shown in Figures 3 and 6, in this embodiment, the rotating body 2 further includes a sealing groove 203 and a sealing ring 204. Each layer of the rotating body 2 has at least two sealing grooves 203. The rotating chamber 201 is located between the sealing grooves 203. The sealing ring 204 is installed inside the sealing groove 203. A 12 is provided between the sealing ring 204 and the sealing groove 203. The sealing ring 204 has at least two contact protrusions 2041. One contact protrusion 2041 is in contact with the outer surface of the intermediate column 1, and the other contact protrusion 2041 is in contact with the inner surface of the sealing groove 203. In this embodiment, the sealing ring 204 is C-shaped at the point of contact with the outer surface of the intermediate column 1 and has two contact protrusions 2041. This allows it to better fit with the outer surface of the intermediate column 1 when subjected to compression deformation, resulting in a better sealing effect.

[0033] like Figure 1 , 5 As shown, in this embodiment, the sealing ring 204 of the rotating body 2 on one side of the adjacent upper rotating component 4 contacts the top or bottom surface of the inner surface of the sealing groove 203. In this embodiment, the uppermost rotating body 2 is rotatably connected to the pressure cap 401. The side of the sealing ring 204 of this rotating body 2 above the rotating chamber 201 that contacts the top surface of the inner surface of the sealing groove 203 is designed as a plane, and the side of the sealing ring 204 below the rotating chamber 201 that contacts the bottom surface of the inner surface of the sealing groove 203 is designed as a plane, which allows for smoother and more stable rotation.

[0034] like Figure 1 , 7As shown, in this embodiment, the fixing member 3 is disposed on the surface of the rotating body 2 and fixed to each layer of the rotating body 2. Each layer of the rotating body 2 has a fixing groove 301 on its surface, which is adapted to the fixing member 3, and the fixing member 3 is disposed within the fixing groove 301. By fixing the fixing members 3, each layer of the rotating body 2 is fixedly connected, ensuring that when connected to an external rotating device, each layer of the rotating body 2 rotates synchronously without displacement between them. In this embodiment, two fixing members 3 are included, symmetrically disposed on the surface of the rotating body 2 and fixed to each layer of the rotating body. The symmetrical arrangement of the fixing members 3 is more conducive to the stability of the rotary joint during rotation.

[0035] like Figure 1 , 2 As shown in Figures 4 and 7, this embodiment also includes a support 6, which comprises a support body 601 and a support connector 602. The support body 601 includes a support through hole 6011, which is located on the support body 601 and coaxial with the intermediate column 1. The intermediate column 1 passes through the support through hole 6011 and is located on the support connector 602. A bearing seat 501 is sleeved on the intermediate column 1 and located on the support body 601. The support connector 602 includes a liquid inlet channel 8 and a liquid inlet interface 9. The liquid inlet channel 8 of the support connector 602 is connected to the liquid inlet channel 8 of the intermediate column 1. In this embodiment, the liquid inlet channels 8 of the support connector 602 and the intermediate column 1 are interconnected, and a sealing structure, such as a sealing ring, is provided at the connection between the support connector 602 and the liquid inlet channel of the intermediate column 1. In this embodiment, liquid inlet ports 9 are provided on both the side and bottom surfaces of the support connector 602. The liquid inlet channel 8 of the support connector 602 is connected to the external equipment pipeline through the liquid inlet ports 9 of the support connector 602. By setting the support connector 602 with the liquid inlet ports 9 at the bottom, a larger interface can be achieved while also increasing the number of interfaces on the side of the support connector 602.

[0036] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of patent protection for this utility model.

Claims

1. A rotary joint, characterized by: The application relates to a rotating device, which comprises an intermediate column, rotating bodies and fixing members, the intermediate column is stacked with multiple layers of the rotating bodies in the axial direction, each layer of the rotating bodies is sleeved on the intermediate column and can rotate, the fixing members are arranged on the outer surfaces of the rotating bodies, the multiple layers of the rotating bodies are locked and synchronously rotated through the fixing members.

2. The rotary joint of claim 1, wherein: The rotating device also comprises upper rotating assemblies and lower rotating assemblies, the rotating bodies are connected with the intermediate column through the upper rotating assemblies and the lower rotating assemblies. The upper rotating assemblies comprise a gland and a bearing, the gland is fixed on the top of the intermediate column, the bearing is sleeved on the intermediate column and located between the gland and the rotating bodies, the gland and the rotating bodies are respectively provided with mounting grooves on the sides adjacent to the bearings, the mounting grooves of the gland and the rotating bodies are combined to form mounting cavities for mounting the bearings, and rotating gaps are arranged between the gland and the rotating bodies. The lower rotating assemblies comprise a bearing seat and a bearing, the bearing seat and the bearing are both sleeved on the bottom of the intermediate column, the bearing is located between the bearing seat and the rotating bodies, the bearing seat and the rotating bodies are respectively provided with mounting grooves on the sides adjacent to the bearings, the mounting grooves of the bearing seat and the rotating bodies are combined to form mounting cavities for mounting the bearings, and rotating gaps are arranged between the bearing seat and the rotating bodies.

3. A rotary joint according to either of claims 1 or 2, characterised in that: The intermediate column comprises liquid inlet interfaces and liquid inlet channels, multiple liquid inlet channels are arranged in the axial direction inside the intermediate column, and the liquid inlet channels are communicated with external pipelines through the liquid inlet interfaces.

4. The rotary joint of claim 3, wherein: The rotating bodies comprise rotating cavities and output interfaces, the rotating bodies are sleeved on the intermediate column and form rotating cavities between the outer surfaces of the intermediate column, the output interfaces are arranged on the outer surfaces of the rotating bodies, the rotating cavities are communicated with the liquid inlet channels, and the output interfaces are communicated with the rotating cavities.

5. The rotary joint of claim 4, wherein: The rotating bodies also comprise sealing grooves and sealing rings, each layer of the rotating bodies is provided with at least two sealing grooves, the rotating cavities are arranged between the sealing grooves, the sealing rings are mounted in the sealing grooves, sliding gaps are arranged between the sealing rings and the sealing grooves, at least two contact convex points are arranged on the sealing rings, one contact convex point is in contact with the outer surface of the intermediate column, and the other contact convex point is in contact with the inner surface of the sealing groove.

6. The rotary joint of claim 5, wherein: Adjacent rotating bodies, the sealing rings are in contact with the top surfaces or bottom surfaces of the inner surfaces of the sealing grooves.

7. A rotary joint according to any one of claims 1 or 2, characterised in that: The fixing members are arranged on the surfaces of the rotating bodies and are fixed with each layer of the rotating bodies.

8. The rotary joint of claim 7, wherein: The surfaces of each layer of the rotating bodies are provided with fixing grooves, the fixing grooves are matched with the fixing members, and the fixing members are arranged in the fixing grooves.

9. The rotary joint of claim 2, wherein: The rotating device also comprises a support, the support comprises a support body and a support joint, the support body comprises a support through hole, the support through hole is arranged on the support body and is coaxial with the intermediate column, the intermediate column passes through the support through hole and is arranged on the support joint, and the bearing seat is sleeved on the intermediate column and arranged on the support body; the support joint comprises liquid inlet channels and liquid inlet interfaces, and the liquid inlet channels of the support joint are communicated with the liquid inlet channels of the intermediate column.

10. The rotary joint of claim 9, wherein: The support joint side and bottom are provided with liquid inlet interfaces, and the liquid inlet channel of the support joint is communicated with external pipelines through the liquid inlet interfaces of the support joint.

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