Non-contact sealing ring based on axial flow guide mechanism

Abstract

The utility model relates to the technical field of non-contact type sealing rings, in particular to a non-contact type sealing ring based on an axial flow guide mechanism, which comprises an inner ring and round blocks, the front end and the rear end of the inner wall of the inner ring are respectively and fixedly connected with the outer sides of the round blocks, and the front side and the rear side of the outer wall of the inner ring are respectively connected with a sealing structure. A plurality of second round openings are formed in the upper side and the lower side of the sealing structure correspondingly, inserting blocks are inserted into the inner walls of the first round openings correspondingly, after a shaft rod in the sealing structure rotates at a high speed, surrounding air can be subjected to thermal expansion, a lantern ring on the outer wall of an inner ring can be supported outwards, a round frame plays a role in limiting the lantern ring, and therefore the sealing effect is improved. According to the non-contact type sealing ring, excessive expansion of the lantern ring can be avoided, in addition, the lantern ring and the sealing ring are in two-way split type sealing, sealing is guaranteed, meanwhile, inclined gaps caused by expansion are avoided, the sealing effect of the non-contact type sealing ring is guaranteed, and normal use of the non-contact type sealing ring is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of non-contact sealing rings based on an axial flow guide mechanism, in particular to a non-contact sealing ring based on an axial flow guide mechanism. Background Art

[0002] The sealing ring is an annular sealing part with a notch. It presses against the inner hole wall of the stationary part to seal due to its elasticity after being pressed together.

[0003] For example, a non-contact fluid dynamic load-bearing sealing ring with the authorization announcement number "CN101644334B" not only greatly improves the bearing body's ability to withstand external loads and the short-time contact wear resistance of the moving and static parts, but also reduces the requirements for indicators such as impurities and temperature of the working medium. The fluid dynamic load-bearing sealing ring has good sealing effect, stable operation, and high reliability, further broadening the scope of engineering application of sealing products. However, in the use of the non-contact sealing ring, the sealing parts at both ends of the outer wall are an integrated structure. When fluid rushes out of the pore, it is easy to tilt on one side, which will cause a gap on the other side of the non-contact sealing ring, reducing the sealing effect of the non-contact sealing ring and affecting the normal use of the non-contact sealing ring. Utility Model Content

[0004] The utility model aims to solve the problem of reducing the sealing effect of the non-contact sealing ring and affecting the normal use of the non-contact sealing ring, and proposes a non-contact sealing ring based on an axial flow guide mechanism.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A non-contact sealing ring based on an axial flow guide mechanism is designed, comprising an inner ring and a round block, wherein the front and rear ends of the inner wall of the inner ring are respectively fixedly connected to the outer sides of a plurality of round blocks, the front and rear sides of the outer wall of the inner ring are respectively connected with sealing structures, the upper and lower sides of the sealing structure are respectively processed with a plurality of second round openings, the inner walls of the plurality of second round openings are respectively plugged with plug blocks, the inner side of the sealing structure is processed with a plurality of first round openings, the inner side of the sealing structure is connected with a plurality of supporting structures, and the outer sides of the plurality of supporting structures are plugged with the inner walls of the first round openings.

[0007] Preferably, the sealing structure comprises a circular frame and a ring, the inner wall of the circular frame is fixedly connected to the outer wall of the inner ring, the outer circular groove of the circular frame fits with the inner side of the outer wall of the ring, and a sealing ring is fixedly connected to the end of the outer wall of the ring.

[0008] Preferably, a plurality of second circular openings are respectively processed on the upper and lower sides of the collar.

[0009] Preferably, the inner wall of the sleeve is in contact with the outer wall of the inner ring.

[0010] Preferably, the supporting structure includes a straight tube and a circular plate, the outer end of the straight tube is fitted with the inner side of the circular frame, the inner wall of the straight tube is fixedly connected to the outer wall of the circular plate, a straight rod is slidably clamped on the outer side of the inner wall of the straight tube, a spring is fixedly connected to the inner side of the straight rod, and the inner side of the spring is fixedly connected to the outer side of the circular plate.

[0011] Preferably, the outer wall end of the straight rod is plugged into the inner wall of the first circular opening.

[0012] The utility model proposes a non-contact sealing ring based on an axial flow guide mechanism, which has the following beneficial effects: after the shaft in the sealing structure rotates at a high speed, the surrounding air will undergo thermal expansion, which will cause the collar on the outer wall of the inner ring to be propped up outward, and the round frame will limit the collar, thereby preventing the collar from expanding excessively. In addition, the collar and the sealing ring are two-way split seals, which ensure the seal while avoiding inclined gaps due to expansion, thereby ensuring the sealing effect of the non-contact sealing ring and ensuring the normal use of the non-contact sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 for Figure 1 A schematic diagram of the connection relationship between the inner ring, the circular frame and the first circular opening;

[0015] Figure 3 for Figure 1 Schematic diagram of the connection relationship between the middle straight tube, the circular plate and the straight rod;

[0016] Figure 4 for Figure 3 The structural diagram of A in the figure;

[0017] Figure 5 for Figure 1 Schematic diagram of the structure of B;

[0018] Figure 6 for Figure 1 Schematic diagram of the structure of C.

[0019] In the figure: 1, inner ring, 2, sealing structure, 201, round frame, 202, sleeve ring, 203, sealing ring, 3, supporting structure, 301, straight tube, 302, round plate, 303, straight rod, 304, spring, 4, round block, 5, first round opening, 6, second round opening, 7, plug block, 8, round ring. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] Example 1: Please refer to Figure 1-6 In the present embodiment, a non-contact sealing ring based on an axial flow guide mechanism comprises an inner ring 1 and a round block 4. The front and rear ends of the inner wall of the inner ring 1 are respectively fixedly connected to the outer sides of a plurality of round blocks 4. The front and rear sides of the outer wall of the inner ring 1 are respectively connected with sealing structures 2. The upper and lower sides of the sealing structure 2 are respectively processed with a plurality of second circular openings 6. The inner walls of the plurality of second circular openings 6 are respectively plugged with plug blocks 7. The plug blocks 7 play a role of blocking the first circular openings 5 ​​to prevent debris from being stuck therein. The inner side of the sealing structure 2 is processed with a plurality of first circular openings 5. The inner side of the sealing structure 2 is connected with a plurality of supporting structures 3. The outer sides of the plurality of supporting structures 3 are plugged with the inner wall of the first circular opening 5.

[0022] The sealing structure 2 includes a round frame 201 and a collar 202. The inner wall of the round frame 201 is fixedly connected to the outer wall of the inner ring 1. The outer circular groove of the round frame 201 fits the inner side of the outer wall of the collar 202. The inner side of the outer wall of the collar 202 can expand within the range of the outer circular groove of the round frame 201. The outer wall end of the collar 202 is fixedly connected to a sealing ring 203, which plays the role of sealing the outer ring. The upper and lower sides of the collar 202 are respectively processed with a plurality of second circular openings 6. The inner wall of the collar 202 fits the outer wall of the inner ring 1.

[0023] When the shaft rod in the sealing structure 2 rotates at a high speed, the surrounding air will expand thermally, causing the ring 202 on the outer wall of the inner ring 1 to prop up outward. The round frame 201 restricts the ring 202 to avoid excessive expansion of the ring 202. In addition, the ring 202 and the sealing ring 203 are two-way split seals, which ensures the seal and avoids tilted gaps due to expansion, thereby ensuring the sealing effect of the non-contact sealing ring and ensuring the normal use of the non-contact sealing ring.

[0024] The supporting structure 3 includes a straight tube 301 and a circular plate 302. The outer end of the straight tube 301 is fitted with the inner side of the circular frame 201. The inner wall of the straight tube 301 is fixedly connected to the outer wall of the circular plate 302. A straight rod 303 is slidably connected to the outer side of the inner wall of the straight tube 301. The straight rod 303 slides back and forth through the inner wall of the straight tube 301 under force. A spring 304 is fixedly connected to the inner side of the straight rod 303. The inner side of the spring 304 is fixedly connected to the outer side of the circular plate 302. After the straight rod 303 is forced to move inward, it rebounds outward due to the elastic force of the spring 304. The outer wall end of the straight rod 303 is plugged into the inner wall of the first circular opening 5.

[0025] Working principle:

[0026] Sealing ring use:

[0027] The inner wall of the inner ring 1 is sleeved with the outer wall of the shaft rod. At this time, the outer wall of the shaft rod is fitted with the inner side of the round block 4. Then the insert block 7 is pulled outward to separate the insert block 7 from the inner wall of the second round opening 6. After the shaft rod rotates at a high speed, the surrounding air will expand thermally, which will cause the ring 202 on the outer wall of the inner ring 1 to prop up outward. The round frame 201 restricts the ring 202 to avoid excessive expansion of the ring 202. In addition, the ring 202 and the sealing ring 203 are two-way split seals, which ensures sealing while avoiding tilting gaps due to expansion.

[0028] Round frame support:

[0029] After the sealing ring is installed, the straight rod 303 is pressed against the inner wall of the straight tube 301, and then the circular plate 302 is cooperated to compress the spring 304, and then the straight tube 301 is placed on the inner side of the two round frames 201. At this time, the outer side of the straight rod 303 fits with the inner side of the round frame 201, and then the straight tube 301 is pushed inward. When the straight rod 303 reaches the first round opening 5, the spring 304 provides elastic force to move the straight rod 303 outward, so that the outer end of the straight rod 303 is plugged into the inner wall of the first round opening 5, so that the straight tube 301 is fixed on the inner side of the round frame 201, thereby supporting the round frame 201.

[0030] Example 2: Please refer to Figure 1-6 In this embodiment, a non-contact sealing ring based on an axial flow guide mechanism further includes a circular ring 8, and the inner sides of the plurality of circular rings 8 are respectively fixedly connected to the outer sides of the plurality of plug-in blocks 7.

[0031] Working principle:

[0032] When the insert block 7 is pulled outward to be separated from the second circular opening 6 , the circular ring 8 can be pulled outward through the circular ring 8 to facilitate the insert block 7 to be separated from the second circular opening 6 .

[0033] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A non-contact sealing ring based on an axial flow guide mechanism, comprising an inner ring (1) and a round block (4), characterized in that: The front and rear ends of the inner wall of the inner ring (1) are respectively fixedly connected to the outer sides of the plurality of round blocks (4); the front and rear sides of the outer wall of the inner ring (1) are respectively connected to sealing structures (2); the upper and lower sides of the sealing structure (2) are respectively processed with a plurality of second round openings (6); the inner walls of the plurality of second round openings (6) are respectively plugged with plug blocks (7); the inner side of the sealing structure (2) is processed with a plurality of first round openings (5); the inner side of the sealing structure (2) is connected to a plurality of supporting structures (3); the outer sides of the plurality of supporting structures (3) are plugged with the inner walls of the first round openings (5).

2. A non-contact sealing ring based on an axial flow guide mechanism according to claim 1, characterized in that: The sealing structure (2) comprises a circular frame (201) and a sleeve ring (202); the inner wall of the circular frame (201) is fixedly connected to the outer wall of the inner ring (1); the outer circular groove of the circular frame (201) fits the inner side of the outer wall of the sleeve ring (202); and a sealing ring (203) is fixedly connected to the end of the outer wall of the sleeve ring (202).

3. A non-contact sealing ring based on an axial flow guide mechanism according to claim 2, characterized in that: A plurality of second circular openings (6) are respectively processed on the upper and lower sides of the collar (202).

4. A non-contact sealing ring based on an axial flow guide mechanism according to claim 2, characterized in that: The inner wall of the sleeve ring (202) fits into the outer wall of the inner ring (1).

5. The non-contact sealing ring based on the axial flow guide mechanism according to claim 1, characterized in that: The support structure (3) comprises a straight tube (301) and a circular plate (302); the outer end of the straight tube (301) fits the inner side of the circular frame (201); the inner wall of the straight tube (301) is fixedly connected to the outer wall of the circular plate (302); a straight rod (303) is slidably engaged with the outer side of the inner wall of the straight tube (301); a spring (304) is fixedly connected to the inner side of the straight rod (303); and the inner side of the spring (304) is fixedly connected to the outer side of the circular plate (302).

6. A non-contact sealing ring based on an axial flow guide mechanism according to claim 5, characterized in that: The outer wall end of the straight rod (303) is plugged into the inner wall of the first circular opening (5).

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