Hydraulic rotary joint capable of avoiding rotary leakage

Abstract

The utility model discloses a hydraulic rotary joint capable of avoiding rotary leakage, which relates to the technical field of hydraulic rotary joints, and comprises a joint shell and a sealing component, a sealing cover component is mounted at one end of the joint shell, a precision bearing is mounted in the middle of the sealing cover component, and a rotary joint component horizontally penetrates through the middle of the precision bearing. The sealing assemblies are arranged and installed in the connector shell at equal intervals. According to the hydraulic rotary joint capable of avoiding rotary leakage, the multiple sealing assemblies are installed in the joint shell at equal intervals, so that multiple separated and sealed spaces are formed between the joint shell and the rotary joint assembly, and therefore good structural sealing is achieved; the sealing performance and stability of the structure can be guaranteed to the maximum extent when the rotary joint assembly rotates in the joint shell through the precision bearing, and meanwhile, the sealing rings with the multiple sets of output ports are formed and matched with the threaded holes, so that connection and medium conveying of multiple pipelines can be achieved at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic rotary joints, and particularly relates to a hydraulic rotary joint for avoiding rotary leakage. Background Technique

[0002] A hydraulic rotary joint is a device used to connect two relatively rotating pipes to convey fluid media such as compressed air, cooling water, hydraulic oil, and heat-conducting oil. It is mainly applied to occasions that require continuous rotation while also requiring fluid supply, such as rotary tables, rotary machinery, etc. The core function of the hydraulic rotary joint lies in its ability to self-balance the transmission of pressure oil or other fluids to the hydraulic rotary cylinder, enabling the piston of the device to move left and right, thereby realizing the radial loosening and clamping of the power chuck. Its working principle is based on the fact that the rotary sealing part is installed on the core shaft of the device, forming two independent sealing spaces to isolate the oil inlet chamber, ensuring the effective transmission and sealing of the fluid. In addition, the hydraulic rotary joint has a compact design structure and uses a flange connection, which can be effectively integrated into the customer's device to provide a sealed rotary connection for 360° rotation and conveying of the medium.

[0003] For a conventional hydraulic rotary joint, the sealing performance and rotational performance of its structure may cause wear of the internal structure as the number of rotations increases, resulting in structural leakage and thus affecting the normal conveyance of the medium.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a hydraulic rotary joint for avoiding rotary leakage is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a hydraulic rotary joint for avoiding rotary leakage to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A hydraulic rotary joint for avoiding rotary leakage, including a joint housing and a sealing assembly. One end of the joint housing is installed with a cover assembly, and a precision bearing is installed in the middle of the cover assembly. A rotating joint assembly horizontally penetrates through the middle of the precision bearing. The sealing assemblies are arranged at equal intervals inside the joint housing. The sealing assembly includes a support ring, a rotary seal, and a wear-resistant coating. A rotary seal is fixed to the edge of the support ring, and wear-resistant coatings are sprayed on the surfaces of the support ring and the rotary seal.

[0007] Further, the joint housing includes a housing body, threaded holes, a docking flange, a sealing groove, and a rotary seal groove. Threaded holes are arranged at equal intervals on the top of the housing body, and a docking flange is provided on the surface of the housing body near the precision bearing.

[0008] Further, the joint housing further includes a sealing groove and a rotary sealing groove. A sealing groove is formed in the middle of the docking flange, and a rotary sealing groove is formed in the inner wall of the housing.

[0009] Further, the sealing grooves are arranged equidistantly on the inner wall surface of the housing, and the inner surface structure of the sealing grooves matches the outer surface structure of the sealing assembly.

[0010] Further, the cover assembly includes a cover body, a connecting flange, and a sealing ring. A connecting flange is provided on the surface of the cover body, and a sealing ring is installed on the side of the cover body close to the joint housing.

[0011] Further, the sealing ring is arranged in a concentric circle structure, and the outer surface structure of the sealing ring matches the inner surface structure of the sealing groove.

[0012] Further, the rotary joint assembly includes a rotating shaft, a fixed flange, a sealing ring, and an output port. A fixed flange is provided at one end of the rotating shaft, a sealing ring is provided on the surface of the end far from the fixed flange, and a is provided on the side of the sealing ring.

[0013] Further, the output port is communicated with the inside of the rotating shaft, the sealing rings are arranged equidistantly on the surface of the rotating shaft, and the sealing rings are arranged between the sealing assemblies arranged equidistantly. The output port is opposite to the threaded hole.

[0014] The utility model provides a hydraulic rotary joint that avoids rotary leakage, having the following beneficial effects:

[0015] 1. In the utility model, a plurality of rotary sealing grooves with inner surface structures matching the outer surface structures of the sealing assemblies are arranged equidistantly inside the housing, so that the sealing assemblies can be equidistantly fitted inside the joint housing and arranged horizontally and equidistantly. At the same time, through the sealing groove formed on the surface of the docking flange at one end of the housing, and in cooperation with the sealing ring with a concentric circle structure installed on one side surface of the cover body, the space between the joint housing and the rotary joint assembly is divided into multiple closed structures. By using the above structures, when the rotary joint assembly axially rotates inside the joint housing by using a precision bearing, the sealing performance inside the structure can be ensured to the greatest extent, effectively avoiding unnecessary leakage problems during the process of rotating and adjusting the rotary joint assembly. Moreover, the sealing assemblies can provide good structural support for the rotary joint assembly in the joint housing, thus ensuring the safety and stability of the entire device during use. In addition, the support ring and the rotary seal are made of soft materials, which facilitates the disassembly and assembly between the structures during daily maintenance.

[0016] 2. In this utility model, multiple groups of sealing rings are arranged equidistantly on the surface of one end of the rotating shaft. With the structural arrangement of the sealing assembly, the space between the rotating joint assembly and the joint housing is compressed as much as possible to achieve a sealing effect. At the same time, the output ports opened on the surface of the sealing ring and connected to the inside of the rotating shaft enable the medium inside the rotating shaft to be transported through the output ports. Along with the structural arrangement of the threaded holes, multiple pipelines can be connected to the entire device using the equidistantly arranged threaded holes to achieve multi-channel transportation. By using the above structure, the flexibility and convenience of using the entire device are effectively guaranteed, thus meeting various usage requirements within a certain range. In addition, the rotating shaft and the fixed flange are connected and combined by a threaded screwing structure, which is convenient for disassembling and assembling the structure of the precision bearing, thereby ensuring the flexibility of maintaining the device structure. When the rotating shaft with the sealing ring is installed inside the joint housing, only need to install the precision bearing between the rotating shaft sealing cover assemblies, and then screw the fixed flange to the front end of the rotating shaft, thus maximizing the operational convenience of simplifying the assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic side view structure of the body of a hydraulic rotary joint for avoiding rotational leakage of this utility model;

[0018] Figure 2 is a schematic internal structure of the body of a hydraulic rotary joint for avoiding rotational leakage of this utility model;

[0019] Figure 3 is a schematic three-dimensional structure of the joint housing of a hydraulic rotary joint for avoiding rotational leakage of this utility model;

[0020] Figure 4 is a schematic three-dimensional structure of the sealing cover assembly of a hydraulic rotary joint for avoiding rotational leakage of this utility model;

[0021] Figure 5 is a schematic three-dimensional structure of the rotating joint assembly of a hydraulic rotary joint for avoiding rotational leakage of this utility model;

[0022] Figure 6 is a schematic three-dimensional structure of the sealing assembly of a hydraulic rotary joint for avoiding rotational leakage of this utility model.

[0023] In the figure: 1. Connector housing; 101. Housing; 102. Threaded hole; 103. Docking flange; 104. Sealing groove; 105. Rotating seal groove; 2. Cover assembly; 201. Cover body; 202. Connecting flange; 203. Sealing ring; 3. Precision bearing; 4. Rotating joint assembly; 401. Rotating shaft; 402. Fixed flange; 403. Sealing ring; 404. Output port; 5. Sealing assembly; 501. Support ring; 502. Rotating seal; 503. Wear-resistant coating. Specific embodiments

[0024] The following further describes in detail the embodiments of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0025] As Figures 1 to 6 shown, a hydraulic rotary joint for avoiding rotational leakage includes a connector housing 1 and a sealing assembly 5. One end of the connector housing 1 is provided with a cover assembly 2, and a precision bearing 3 is installed in the middle of the cover assembly 2. A rotating joint assembly 4 horizontally penetrates through the middle of the precision bearing 3. The sealing assemblies 5 are arranged equidistantly inside the connector housing 1. The sealing assembly 5 includes a support ring 501, a rotating seal 502, and a wear-resistant coating 503. A rotating seal 502 is fixed to the edge of the support ring 501, and wear-resistant coatings 503 are sprayed on the surfaces of both the support ring 501 and the rotating seal 502. The connector housing 1 includes a housing 101, threaded holes 102, docking flanges 103, sealing grooves 104, and rotating seal grooves 105. Threaded holes 102 are arranged equidistantly at the top of the housing 101, and a docking flange 103 is provided on the surface of the housing 101 near the precision bearing 3. The connector housing 1 further includes a sealing groove 104 and a rotating seal groove 105. A sealing groove 104 is opened in the middle of the docking flange 103, and a rotating seal groove 105 is opened on the inner wall of the housing 101. The sealing grooves 104 are arranged equidistantly on the inner wall surface of the housing 101, and the inner surface structure of the sealing groove 104 matches the outer surface structure of the sealing assembly 5. By arranging a plurality of rotating seal grooves 105 with inner surface structures matching the outer surface structure of the sealing assembly 5 equidistantly inside the housing 101, the sealing assemblies 5 can be equidistantly fitted into the connector housing 1 and arranged horizontally equidistantly. At the same time, through the sealing groove 104 opened on the surface of the docking flange 103 at one end of the housing 101, cooperating with the concentric sealing ring 203 installed on one side surface of the cover body 201, the space between the connector housing 1 and the rotating joint assembly 4 is divided into multiple closed structures.

[0026] As Figures 1 to 6As shown in the figure, the cover assembly 2 includes a cover body 201, a connecting flange 202 and a sealing ring 203. The surface of the cover body 201 is provided with a connecting flange 202, and a sealing ring 203 is installed on the side of the cover body 201 close to the joint housing 1. The sealing ring 203 is arranged in a concentric circle structure, and the outer surface structure of the sealing ring 203 matches the inner surface structure of the sealing groove 104. The rotating joint assembly 4 includes a rotating shaft 401, a fixed flange 402, a sealing ring 403 and an outlet 404. One end of the rotating shaft 401 is provided with a fixed flange 402, and a sealing ring 403 is arranged on the surface of the end far from the fixed flange 402. Moreover, an opening is provided on the side of the sealing ring 403. The outlet 404 is communicated with the inside of the rotating shaft 401, and the sealing rings 403 are arranged at equal intervals on the surface of the rotating shaft 401. Moreover, the sealing rings 403 are arranged between the equally spaced sealing assemblies 5. The outlet 404 is opposite to the position of the threaded hole 102. By arranging multiple groups of sealing rings 403 at equal intervals on the surface of one end of the rotating shaft 401 and matching with the structural arrangement of the sealing assembly 5, a good separation and sealing effect is achieved. At the same time, the outlet 404 opened on the surface of the sealing ring 403 and communicated with the inside of the rotating shaft 401, and with the structural arrangement of the threaded hole 102, multiple pipelines can be connected to the whole device at the same time by using the equally spaced threaded holes 102, so as to realize multi-channel transportation.

[0027] In summary, as Figures 1 to 6 shown in the figure, when the hydraulic rotary joint for preventing rotary leakage is in use, first, according to the usage requirements, external multi-channel pipelines can be structurally connected through the threaded holes 102 opened on the outer surface of the housing 101, so that the whole device can transmit media for different lines at the same time, achieving a shunt effect. In addition, the sealing groove 104 on the surface of the docking flange 103, in cooperation with the sealing ring 203 on one side surface of the cover body 201, enables the inside of the joint housing 1 to provide as much sealing performance and stability as possible;

[0028] Subsequently, the fixed flange 402 at one end of the rotating shaft 401 is docked with the upstream conveying pipeline, so as to realize rapid combined connection in the conveying pipeline. When it is necessary to use the whole device to convey the medium, by virtue of the rotational property of the precision bearing 3 installed at the center of the cover assembly 2, the rotating joint assembly 4 can axially rotate at any angle inside the joint housing 1;

[0029] With the axial rotation of the rotating shaft 401, at this time, with the assistance of the sealing assembly 5, the support ring 501 and the rotary seal 502 with wear-resistant coating 503 sprayed on the surface will rotate and adjust simultaneously inside the rotary sealing groove 105 on the inner wall surface of the housing 101, providing structural support for the rotary joint assembly 4 and ensuring the structural sealing between the rotary joint assembly 4 and the joint housing 1. The medium inside the rotating shaft 401 will flow out from the outlet 404 opened on the surface of the sealing ring 403, and flow into the space formed by the combination of the housing 101, the sealing assembly 5 and the sealing ring 403, and finally flow into the shunt pipeline installed at the structure of the threaded hole 102 and be conveyed to the downstream equipment.

[0030] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles of the present invention and its practical application, and to enable those of ordinary skill in the art to understand the present invention so as to design various embodiments with various modifications suitable for specific purposes.

Claims

1. A hydraulic rotary joint for avoiding rotary leakage, comprising a joint housing (1) and a sealing assembly (5), characterized in that: A sealing cover assembly (2) is installed at one end of the joint housing (1), and a precision bearing (3) is installed in the middle of the sealing cover assembly (2), and a rotating joint assembly (4) is horizontally penetrated in the middle of the precision bearing (3), and the sealing assembly (5) is equidistantly arranged and installed inside the joint housing (1), and the sealing assembly (5) comprises a support ring (501), a rotating seal (502) and a wear-resistant coating (503), the rotating seal (502) is fixed to the edge of the support ring (501), and the surfaces of the support ring (501) and the rotating seal (502) are sprayed with the wear-resistant coating (503).

2. A hydraulic rotary joint for avoiding rotation leakage according to claim 1, characterized in that: The joint housing (1) comprises a shell (101), threaded holes (102), a docking flange (103), a sealing groove (104) and a rotating sealing groove (105); the threaded holes (102) are arranged at equal intervals on the top of the shell (101), and a docking flange (103) is provided on one end surface of the shell (101) close to the precision bearing (3).

3. A hydraulic rotary joint for avoiding rotation leakage according to claim 2, characterized in that: The joint housing (1) further comprises a sealing groove (104) and a rotating sealing groove (105); the sealing groove (104) is provided in the middle of the docking flange (103); and the rotating sealing groove (105) is provided on the inner wall of the housing (101).

4. A hydraulic rotary joint for avoiding rotation leakage according to claim 3, characterized in that: The sealing grooves (104) are arranged at equal intervals and are opened on the inner wall surface of the housing (101), and the inner surface structure of the sealing grooves (104) matches the outer surface structure of the sealing assembly (5).

5. A hydraulic rotary joint for avoiding rotation leakage according to claim 3, characterized in that: The sealing cover assembly (2) comprises a cover body (201), a connecting flange (202) and a sealing ring (203); the surface of the cover body (201) is provided with a connecting flange (202) and a sealing ring (203) is installed on a side of the cover body (201) close to the joint housing (1).

6. A hydraulic rotary joint for avoiding rotation leakage according to claim 5, characterized in that: The sealing ring (203) is arranged in a concentric circle structure, and the outer surface structure of the sealing ring (203) matches the inner surface structure of the sealing groove (104).

7. A hydraulic rotary joint for avoiding rotation leakage according to claim 2, characterized in that: The rotary joint assembly (4) comprises a rotating shaft (401), a fixing flange (402), a sealing ring (403) and an output port (404); one end of the rotating shaft (401) is provided with a fixing flange (402), and the sealing ring (403) is provided on the surface of the end away from the fixing flange (402), and the side of the sealing ring (403) is provided with.

8. A hydraulic rotary joint for avoiding rotation leakage according to claim 7, characterized in that: The output port (404) is connected to the interior of the rotating shaft (401), and the sealing rings (403) are arranged equidistantly on the surface of the rotating shaft (401), and the sealing rings (403) are arranged between the sealing components (5) arranged equidistantly, and the output port (404) is opposite to the threaded hole (102).

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