Rotary joint with tesla valve and method for sealing the same

Abstract

The application discloses a rotary joint with a Tesla valve, which comprises a dynamic rotary component and a static rotary component, both of which are in the shape of a conical cylinder, and the dynamic rotary component and the static rotary component are connected with each other in a nested rotary mode, and an elastic compression structure for realizing elastic compression in the axial direction is arranged between the dynamic rotary component and the static rotary component, a spiral Tesla valve flow channel is formed on the outer side of the static rotary component, a third supporting plate is arranged on the outer side of the wide end of the dynamic rotary component, a second supporting plate is arranged on the outer side of the wide end of the static rotary component, a labyrinth sealing structure is arranged between the second supporting plate and the third supporting plate, and when air from the outside passes through the Tesla valve flow channel and flows towards the inside of the static rotary component, the gas flows in the reverse direction in the Tesla valve flow channel, the energy loss of the gas flow in the Tesla valve flow channel is increased, and the sealing effect of the wide end of the dynamic rotary component is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary sealing, and in particular to a rotary joint using a Tesla valve and a sealing method thereof. Background Art

[0002] At present, the rotary joint and the rotating cylinder are connected by a hard connection structure, which is often used in pipeline connection devices. The connected pipelines can rotate relative to each other and can be used to transmit various media such as gas, liquid, oil, etc. The compact design structure has poor sealing effect at the connection of the rotating cylinder, such as the existing mechanical sealing methods such as packing seals and labyrinth seals, which often lead to gas or liquid leakage.

[0003] Application number CN201310433260.3 is a double mechanical seal type rotary joint, wherein the proximal housing is bolted to the outlet housing; the proximal dynamic seal ring is disposed in the proximal housing and forms a seal with the shaft sleeve; the proximal dynamic seal ring is provided with a proximal bearing pad at one end and a proximal static seal ring at the other end;

[0004] In the above-mentioned prior art, the sealing method is single and the effect is poor, and it is impossible to effectively seal the connection. Summary of the Invention

[0005] The purpose of the present invention is to provide a rotary joint using a Tesla valve in order to solve the above problems and overcome the defects of the prior art, as described in detail below.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The present invention provides a rotary joint using a Tesla valve, including a dynamic rotating component and a static rotating component, both of which are in the shape of a conical cylinder. The dynamic rotating component and the static rotating component are nested and rotatably connected to each other. An elastic compression structure for achieving axial elastic compression is provided between the dynamic rotating component and the static rotating component. A spiral Tesla valve flow channel is provided on the outside of the static rotating component. A third support plate is provided on the outside of the wide end of the dynamic rotating component, and a second support plate is provided on the outside of the wide end of the static rotating component. A labyrinth sealing structure is provided between the second support plate and the third support plate.

[0008] Preferably, a first packing seal is provided between the narrow end surface of the static rotating component and the inner end surface of the first support plate, and a second packing seal is provided between the third support plate and the second support plate.

[0009] As preferred, the elastic compression structure comprises four or more guide rods evenly distributed at equal angles around the axis of the dynamic rotating member, the axes of the guide rods are parallel to each other, one end of each guide rod is fixedly connected to the second support plate, the outer side of the first support plate is rotatably connected to the outer ring through the first bearing, the other end of each guide rod slides through the outer ring and is fixedly connected to the compression ring through a bolt, and springs are nested outside the guide rods between the outer ring and the compression ring.

[0010] As preferred, the second support plate is fixedly provided with a support ring near the side close to the third support plate, and a second bearing is arranged between the inner side of the support ring and the outer side of the third support plate.

[0011] As preferred, the labyrinth seal structure comprises a first sealing ring and a second sealing ring, the side close to each other of the second support plate and the third support plate is respectively provided with a first annular embedding groove and a second annular embedding groove, one side of the first sealing ring is embedded into the first annular embedding groove and connected to one end of a connecting bolt, and the other end of the connecting bolt passes through the third support plate and is threadedly connected to a nut.

[0012] As preferred, the side close to the first sealing ring of the second sealing ring is fixedly connected to a plurality of second partition rings evenly distributed, the first sealing ring is provided with second partition grooves matched with the second partition rings, the second partition rings are arranged in concentric circles, the side close to the second sealing ring of the first sealing ring is fixedly connected to a plurality of first partition rings evenly distributed, the first partition rings are arranged in concentric circles, and the second sealing ring is provided with first partition grooves matched with the first partition rings.

[0013] When the first sealing ring and the second sealing ring are connected to each other, the first partition grooves and the second partition grooves are arranged in a herringbone shape.

[0014] As preferred, the narrow end of the dynamic rotating member is fixedly connected to a first conduit, and the wide end of the static rotating member is fixedly connected to a second conduit.

[0015] A sealing method of a rotary joint adopting a Tesla valve, comprising the following steps:

[0016] S1: the narrow end of the static rotating member is inserted into the inside of the dynamic rotating member from the wide end of the dynamic rotating member, at this time, the first sealing ring is embedded into the first annular embedding groove, the second sealing ring is embedded into the second annular embedding groove, the first sealing ring and the second sealing ring are fixedly connected through the connecting bolt and the nut respectively, the dynamic rotating member drives the second partition ring to rotate in the second partition groove and the first partition ring to rotate in the first partition groove when rotating, and the labyrinth seal between the dynamic rotating member and the static rotating member is realized.

[0017] S2: The narrow end of the static rotating component is sealed with the first support plate by a first packing seal ring, and the third support plate and the second support plate are sealed by a second packing seal ring. The first packing seal ring and the second packing seal ring cooperate to achieve packing seals at both ends of the static rotating component;

[0018] S3: Due to the pressure difference between the outside world and the inside of the static rotating component, when the outside air flows through the Tesla valve flow channel toward the inside of the static rotating component, the gas flows in the Tesla valve flow channel in the reverse direction, increasing the energy loss of the gas flow in the Tesla valve flow channel and playing a sealing role at the wide end of the dynamic rotating component.

[0019] The beneficial effects are:

[0020] 1. The first packing seal ring and the second packing seal ring adopt the packing seal method to realize the sealing at the port of the second packing seal ring, and the first sealing ring and the second sealing ring cooperate to realize the labyrinth seal of the high-pressure material port and the wide-mouth end of the dynamic rotating component, while the Tesla valve flow channel can realize the sealing between the conical contact surfaces of the dynamic rotating component and the static rotating component;

[0021] 2. The first spacer ring and the second spacer ring can cooperate to achieve the blocking and reverse flow of airflow, achieve the blocking of gas flow and energy consumption, cooperate with the Tesla valve flow channel and packing seal, greatly improve the overall sealing effect;

[0022] 3. The elastic compression structure has the function of pushing the dynamic rotating component and the static rotating component axially closer together, so that the dynamic rotating component and the static rotating component are elastically compressed and close to each other in the axial direction, and can also improve the sealing effect of the first packing seal ring and the second packing seal ring;

[0023] 4. When the outside air flows through the Tesla valve flow channel toward the interior of the static rotating component, the gas flows in the Tesla valve flow channel in the reverse direction, increasing the energy loss of the gas flow in the Tesla valve flow channel and sealing the wide end of the dynamic rotating component. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a front view of the present invention;

[0026] Figure 2 This invention Figure 1 Stereoscopic image of

[0027] Figure 3 is a front view of the static rotating component of the present invention;

[0028] Figure 4 This invention Figure 1 A partial enlarged view of point A.

[0029] The accompanying drawings are marked as follows: 1. dynamic rotating component; 2. static rotating component; 3. first support plate; 4. first conduit; 5. second conduit; 6. first packing seal; 7. first bearing; 8. elastic pressing structure; 8a. guide rod; 8b. outer ring; 8c. spring; 8d. pressure ring; 9. second support plate; 10. Tesla valve flow channel; 11. first sealing ring; 12. second sealing ring; 13. first spacer ring; 14. first spacer groove; 15. connecting bolt; 16. nut; 17. second spacer ring; 18. second spacer groove; 19. third support plate; 20. support ring; 21. second bearing; 22. second packing seal. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0031] See also Figures 1-4 As shown, the present invention provides a rotary joint using a Tesla valve, including a dynamic rotating component 1 and a static rotating component 2, both of which are in the shape of a conical cylinder. The dynamic rotating component 1 and the static rotating component 2 are nested and rotatably connected to each other, and the dynamic rotating component 1 and the static rotating component 2 share a common central axis. An elastic compression structure 8 for achieving axial elastic compression is provided between the dynamic rotating component 1 and the static rotating component 2. A spiral Tesla valve flow channel 10 is provided on the outside of the static rotating component 2. A third support plate 19 is provided on the outside of the wide end of the dynamic rotating component 1, and a second support plate 9 is provided on the outside of the wide end of the static rotating component 2. A labyrinth sealing structure is provided between the second support plate 9 and the third support plate 19.

[0032] A first packing seal ring 6 is provided between the narrow end surface of the static rotating component 2 and the inner end surface of the first support plate 3 , and a second packing seal ring 22 is provided between the third support plate 19 and the second support plate 9 .

[0033] See the instructions attached Figure 1 and 2As shown, the elastic compression structure 8 includes four or more guide rods 8a evenly distributed at equal angles with the axis of the dynamic rotating member 1 as the center, the axes of the guide rods 8a are parallel to each other, one end of each guide rod 8a is fixedly connected to the second support plate 9, the outer side of the first support plate 3 is rotatably connected with a sleeve ring 8b through the first bearing 7, the other end of each guide rod 8a slides through the sleeve ring 8b and is fixedly connected with a compression ring 8d through a bolt, and a spring 8c is nested outside the guide rod 8a between the sleeve ring 8b and the compression ring 8d. In actual application, the elastic compression structure 8 has the effect of pushing the dynamic rotating member 1 and the static rotating member 2 to approach along the axis, so that the dynamic rotating member 1 and the static rotating member 2 are elastically compressed and approached along the axis, and the sealing effect of the first packing seal ring 6 and the second packing seal ring 22 is better.

[0034] The second support plate 9 is fixedly provided with a support ring 20 on the side close to the third support plate 19, and the second bearing 21 is arranged between the inner side of the support ring 20 and the outer side of the third support plate 19.

[0035] See the accompanying drawings Figure 1 and 4 As shown, the labyrinth seal structure includes the first seal ring 11 and the second seal ring 12, the second support plate 9 and the third support plate 19 are respectively provided with a first annular embedding groove and a second annular embedding groove on the side close to each other, one side of the first seal ring 11 is embedded into the first annular embedding groove and is connected with one end of the connecting bolt 15, the other end of the connecting bolt 15 penetrates out of the third support plate 19 and is threadedly connected with the nut 16. The second seal ring 12 is fixedly connected with a plurality of second partition rings 17 evenly distributed on the side close to the first seal ring 11, the first seal ring 11 is provided with the second partition grooves 18 which are connected with the second partition rings 17 in a clearance fit, the second partition rings 17 are arranged in concentric circles, the first seal ring 11 is fixedly connected with a plurality of first partition rings 13 evenly distributed on the side close to the second seal ring 12, the first partition rings 13 are arranged in concentric circles, and the second seal ring 12 is provided with the first partition grooves 14 which are connected with the first partition rings 13 in a clearance fit; when the first seal ring 11 and the second seal ring 12 are connected with each other, the first partition grooves 14 and the second partition grooves 18 are arranged in a herringbone shape. Through the above specific structure design, when the external air enters the static rotating member 2 through the wide end of the dynamic rotating member 1 under the action of the air pressure difference, the first partition ring 13 and the second partition ring 17 can cooperate to block and reverse the flow of the air, block the flow of the gas and consume energy, and cooperate with the Tesla valve flow channel 10 and the packing seal to greatly improve the overall sealing effect.

[0036] The narrow end of the dynamic rotating member 1 is fixedly connected with the first conduit 4, and the wide end of the static rotating member 2 is fixedly connected with the second conduit 5.

[0037] Sealing method:

[0038] The narrow end of the static rotating component 2 is inserted into the interior of the dynamic rotating component 1 through the wide end of the dynamic rotating component 1. At this time, the first sealing ring 11 is embedded in the first annular embedding groove, and the second sealing ring 12 is embedded in the second annular embedding groove. The first sealing ring 11 and the second sealing ring 12 are respectively fastened and fixed by connecting bolts 15 and nuts 16. When the dynamic rotating component 1 rotates, the second spacer ring 17 is driven to rotate in the second spacer groove 18, and the first spacer ring 13 is driven to rotate in the first spacer groove 14, thereby realizing a labyrinth seal between the dynamic rotating component 1 and the static rotating component 2.

[0039] The narrow end of the static rotating member 2 is sealed with the first support plate 3 via the first packing seal 6, and the third support plate 19 and the second support plate 9 are sealed via the second packing seal 22. The first packing seal 6 and the second packing seal 22 cooperate to achieve packing sealing of the two ends of the static rotating member 2.

[0040] Due to the pressure difference between the outside world and the inside of the static rotating component 2, when the outside air flows through the Tesla valve flow channel 10 toward the inside of the static rotating component 2, the gas flows in the Tesla valve flow channel 10 in the reverse direction, increasing the energy loss of the gas flow in the Tesla valve flow channel 10, and playing a sealing role on the wide end of the dynamic rotating component 1.

[0041] In actual application, the first packing sealing ring 6 and the second packing sealing ring 22 use packing sealing to achieve sealing at the port of the second packing sealing ring 22, and the first sealing ring 11 and the second sealing ring 12 cooperate to achieve a labyrinth seal for the high-pressure material port and the wide-mouth end of the dynamic rotating component 1, and the Tesla valve flow channel 10 can achieve sealing between the conical contact surfaces of the dynamic rotating component 1 and the static rotating component 2.

[0042] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A rotary joint using a Tesla valve, characterized by: The invention comprises a dynamic rotating component (1) and a static rotating component (2) both of which are in the shape of a conical cylinder. The dynamic rotating component (1) and the static rotating component (2) are connected to each other in a nested rotational manner. An elastic compression structure (8) for achieving elastic compression in the axial direction is provided between the dynamic rotating component (1) and the static rotating component (2). A spiral Tesla valve flow channel (10) is provided on the outside of the static rotating component (2). A third support plate (19) is provided on the outside of the wide end of the dynamic rotating component (1). A second support plate (9) is provided on the outside of the wide end of the static rotating component (2). A labyrinth sealing structure is provided between the second support plate (9) and the third support plate (19). A first packing seal ring (6) is provided between the narrow end face of the static rotating component (2) and the inner end face of the first support plate (3), and a second packing seal ring (22) is provided between the third support plate (19) and the second support plate (9); The elastic pressing structure (8) includes four or more guide rods (8a) uniformly distributed at equal angles with the central axis of the dynamic rotating component (1) as the center, the axial directions of these guide rods (8a) are parallel to each other, one end of each guide rod (8a) is fixedly connected to the second support plate (9), the outer side of the first support plate (3) is rotatably connected to an outer ring (8b) through a first bearing (7), the other ends of these guide rods (8a) slide through the outer ring (8b) and are fixedly connected to a pressure ring (8d) by bolts, and a spring (8c) is embedded on the outer side of the guide rod (8a) between the outer ring (8b) and the pressure ring (8d); A support ring (20) is fixedly provided on one side of the second support plate (9) close to the third support plate (19), and a second bearing (21) is provided between the inner side of the support ring (20) and the outer side of the third support plate (19); The labyrinth seal structure comprises a first sealing ring (11) and a second sealing ring (12); a first annular embedding groove and a second annular embedding groove are respectively provided on the side of the second support plate (9) and the third support plate (19) close to each other; one side of the first sealing ring (11) is embedded in the first annular embedding groove and connected to one end of a connecting bolt (15); the other end of the connecting bolt (15) passes through the third support plate (19) and is threadedly connected to a nut (16); The second sealing ring (12) is fixedly connected to a side close to the first sealing ring (11) with a plurality of evenly distributed second spacer rings (17); the first sealing ring (11) is provided with a second spacer groove (18) which is loosely connected to the second spacer ring (17); these second spacer rings (17) are arranged in a concentric circle; the first sealing ring (11) is fixedly connected to a side close to the second sealing ring (12) with a plurality of evenly distributed first spacer rings (13); these first spacer rings (13) are arranged in a concentric circle; the second sealing ring (12) is provided with a first spacer groove (14) which is loosely connected to the first spacer ring (13); When the first sealing ring (11) and the second sealing ring (12) are connected to each other, the first barrier groove (14) and the second barrier groove (18) are arranged alternately in a herringbone pattern.

2. A rotary joint using a Tesla valve according to claim 1, characterized in that: The narrow end of the dynamic rotating component (1) is fixedly connected to a first conduit (4), and the wide end of the static rotating component (2) is fixedly connected to a second conduit (5).

3. The sealing method of a rotary joint using a Tesla valve according to claim 1, characterized in that: The following steps are involved: S1: The narrow end of the static rotating component (2) is inserted into the interior of the dynamic rotating component (1) from the wide end of the dynamic rotating component (1). At this time, the first sealing ring (11) is embedded in the first annular embedded groove, and the second sealing ring (12) is embedded in the second annular embedded groove. The first sealing ring (11) and the second sealing ring (12) are respectively fastened and fixed by connecting bolts (15) and nuts (16). When the dynamic rotating component (1) rotates, the second spacer ring (17) is driven to rotate in the second spacer groove (18), and the first spacer ring (13) is driven to rotate in the first spacer groove (14), thereby realizing a labyrinth seal between the dynamic rotating component (1) and the static rotating component (2); S2: The narrow end of the static rotating component (2) is sealed with the first support plate (3) via the first packing seal ring (6), and the third support plate (19) and the second support plate (9) are sealed via the second packing seal ring (22). The first packing seal ring (6) and the second packing seal ring (22) cooperate to achieve packing sealing of the two ends of the static rotating component (2); S3: Due to the pressure difference between the outside and the inside of the static rotating component (2), when the outside air flows through the Tesla valve flow channel (10) toward the inside of the static rotating component (2), the gas flows in the Tesla valve flow channel (10) in the reverse direction, increasing the energy loss of the gas flow in the Tesla valve flow channel (10), and playing a sealing role on the wide end of the dynamic rotating component (1).

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