Sealing element with self-lubricating effect

Abstract

The utility model relates to a sealing element with a self-lubricating effect, which is characterized in that magnetic rings are additionally arranged on the inner cavity walls of a movable ring and a sealing cover, lubricating oil is stored in the inner cavities of the movable ring and the sealing cover, the lubricating oil is extruded by the magnetic attraction force of the magnetic rings, and a part of the lubricating oil flows out of a static ring and a spring seat; and the other part of lubricating oil fully flows into the rotating machine under the magnetic attraction pressure, so that abrasion caused by continuous friction in the rotating machine is effectively reduced, mechanical parts do not need to be frequently replaced, the time cost and the capital cost are effectively reduced, and the purpose that the lubricating oil is always in close contact with a sealing piece through magnetic force is achieved.

Description

Technical Field

[0001] The utility model relates to a sealing member with a self-lubricating effect, in particular to a magnetic self-lubricating device of a sealing member with a self-lubricating effect applied in the technical field of mechanical sealing. Background Art

[0002] Mechanical seal is a shaft sealing device for rotating machinery. Since the transmission shaft runs through the inside and outside of the equipment, there is a circumferential gap between the shaft and the equipment. The medium in the equipment leaks out through this gap. If the pressure inside the equipment is lower than the atmospheric pressure, air will leak into the equipment. Therefore, a shaft sealing device is needed to prevent leakage.

[0003] In order to solve the problem of seal wear, a certain mechanical seal in the market adopts a smear lubrication design and has a certain market share.

[0004] The specification of Chinese utility model patent CN214838395U discloses a mechanical seal with a self-lubricating structure, which includes a rotating shaft and a heat sink. A fixed ring is nested and connected to the outer side of the rotating shaft, and a moving ring is slidably connected to the inner side of the right end of the fixed ring. A limiting shell is arranged on the outer side of the moving ring, and a sealing gasket is tightly connected to the inner side of the limiting shell. A push plate is arranged on the inner side of the left end of the sealing gasket. A cavity is opened inside the outer end of the push plate, and a connecting block is fixedly connected to the inner side of the inner end of the cavity, and a sponge is installed on the inner side of the upper left end of the push plate. The heat sink is located on the inner side of the left end of the limiting shell, and a spring is nested and connected to the outer side of the right end of the limiting shell, and the right side of the spring is fit-connected with the limiting plate.

[0005] Most of the existing mechanical seals are lubricated. Although it is simple and easy to operate, the lubricant is constantly consumed over time and needs to be added regularly. It is not only troublesome but also time-consuming and labor-intensive. In addition, the lubricant cannot always maintain a good close contact with the friction point. Utility Model Content

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the utility model is that the mechanical seal needs to be continuously added with lubricant and the lubricant cannot be in close contact with the seal all the time.

[0007] In order to solve the above problems, the utility model provides a sealing member with a self-lubricating effect, comprising a static ring and a spring seat, a self-rotating shaft body is installed between the static ring and the spring seat, a spring 1 is installed between the static ring and the spring seat, a sealing cover is sleeved on the outer wall of the static ring, a dynamic ring is sleeved on the outer wall of the spring seat, a dynamic ring sealing ring is nested between the spring seat and the dynamic ring, a telescopic groove is opened at one end of the dynamic ring close to the sealing cover, the sealing cover is inserted into the telescopic groove, a spring 2 is fixedly connected between one end of the sealing cover located in the telescopic groove and the groove bottom of the telescopic groove, a pair of magnetic suction cups are fixedly connected to the inner wall of the sealing cover and the dynamic ring, each pair of two magnetic suction cups are placed inside and outside, the magnetic suction cups comprise a magnetic seat, a magnetic ring is fixedly inlaid on the side wall of the magnetic seat, two opposite magnetic suction cups are magnetically attracted to each other, an isolation ring 1 is fixedly connected between the two magnetic suction cups on the sealing cover, an isolation ring 2 is fixedly connected between the two magnetic suction cups on the dynamic ring, a self-sealing oil injection piece is fixedly inlaid on the side wall of the sealing cover, and the self-sealing oil injection piece runs through the interior of the sealing cover.

[0008] In the above-mentioned seal with self-lubricating effect, the purpose of keeping the lubricating oil in close contact with the seal at all times is achieved by relying on magnetic force.

[0009] As a further improvement of the present application, the self-sealing oil filling part includes an oil filling tube, a fixing ring is fixedly connected to the opening of the oil filling tube, a self-sealing silicone sleeve is fixedly connected to the inner wall of the fixing ring, a leak-proof ball is placed between the self-sealing silicone sleeve and the fixing ring, and a plurality of flow holes are opened on the side wall away from the fixing ring.

[0010] As a further improvement of the present application, both isolation ring 1 and isolation ring 2 are made of magnetic isolation material, and the side wall of isolation ring 1 is provided with a through hole matching the self-sealing oil filling part.

[0011] As a further improvement of the present application, the diameter of the self-sealing silicone sleeve is larger than the caliber of the fixing ring, the fixing ring and the leak-proof ball are both made of silicone material, and a silicone sealing ring is fixedly connected to the port where the fixing ring contacts the leak-proof ball.

[0012] As another improvement of the present application, the outer wall of the sealing cover close to the moving ring is engraved with scale lines, and the scale lines are coated with fluorescent material.

[0013] As a further improvement and supplement to the present application, an oil pipeline is inserted into the fixing ring, and an oil outlet is opened on the side wall of the oil pipeline.

[0014] To summarize, this solution adds magnetic rings to the inner walls of the moving ring and the sealing cover, uses the inner cavities of the moving ring and the sealing cover to store lubricating oil, relies on the magnetic attraction of the magnetic rings to squeeze the lubricating oil, and a portion of the lubricating oil flows into the static ring and the spring seat, while the other portion of the lubricating oil fully flows into the interior of the rotating machinery under the magnetic attraction pressure. This not only effectively reduces the wear caused by the continuous friction inside the rotating machinery, but also eliminates the need for frequent replacement of mechanical parts, effectively reducing time and financial costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional cross-sectional view of the first embodiment of the present application;

[0016] Figure 2 This is a front view of the first embodiment of the present application when it is filled with lubricating oil;

[0017] Figure 3 This is a front view of the first embodiment of the present application when the lubricating oil is about to be consumed;

[0018] Figure 4 This is a front view of the magnetic chuck structure of the first embodiment of the present application;

[0019] Figure 5 A three-dimensional cross-sectional view of a self-sealing oil filling piece according to a second embodiment of the present application;

[0020] Figure 6 This is a front view of the self-sealing oil filling piece of the second embodiment of the present application in a non-oil-filled state;

[0021] Figure 7 This is a front view of the self-sealing oil filling piece of the second embodiment of the present application in the oil filling state;

[0022] Figure 8 This is a three-dimensional schematic diagram of the sealing ring during oil filling in the second embodiment of the present application.

[0023] Description of the numbers in the figure:

[0024] 1 rotating shaft, 2 static ring, 3 spring 1, 4 spring seat, 5 sealing cover, 501 scale line, 6 dynamic ring, 7 dynamic ring sealing ring, 8 spring 2, 9 self-sealing oil filling part, 901 oil filling pipe, 902 fixing ring, 903 anti-leakage ball, 904 self-sealing silicone sleeve, 905 flow hole, 906 oil pipeline, 10 magnetic suction cup, 1001 magnetic seat, 1002 magnetic ring, 11 isolation ring 1, 12 isolation ring 2. DETAILED DESCRIPTION

[0025] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0026] The first implementation method:

[0027] Figure 1 , 23 shows that it includes a static ring 2 and a spring seat 4, a rotating shaft 1 is installed between the static ring 2 and the spring seat 4, a spring 3 is installed between the static ring 2 and the spring seat 4, a sealing cover 5 is sleeved on the outer wall of the static ring 2, a dynamic ring 6 is sleeved on the outer wall of the spring seat 4, a dynamic ring sealing ring 7 is nested between the spring seat 4 and the dynamic ring 6, a telescopic groove is opened at one end of the dynamic ring 6 close to the sealing cover 5, the sealing cover 5 is inserted into the telescopic groove, a spring 2 8 is fixedly connected between one end of the sealing cover 5 located in the telescopic groove and the bottom of the telescopic groove, a scale line 501 is engraved on the outer wall of the sealing cover 5 close to the dynamic ring 6, and a fluorescent material is coated on the scale line 501. By utilizing the elastic telescopic effect of the spring 2 8, not only the oil amount of the storage lubricating oil of the seal is effectively solved, but also the oil amount of the lubricating oil can be detected in time in a dark environment, and the wear caused by insufficient lubricating oil can be effectively avoided.

[0028] Figure 1 , 2 , 3 and 4 show that the inner walls of the sealing cover 5 and the moving ring 6 are fixedly connected with a pair of magnetic suckers 10, and each pair of two magnetic suckers 10 are placed inside and outside, and the magnetic suckers 10 include a magnetic seat 1001, and the side wall of the magnetic seat 1001 is fixedly inlaid with a magnetic ring 1002. The two opposite magnetic rings 1002 are magnetically attracted to each other, and an isolation ring 11 is fixedly connected between the two magnetic suckers 10 on the sealing cover 5, and an isolation ring 2 12 is fixedly connected between the two magnetic suckers 10 on the moving ring 6. The isolation ring 11 and the isolation ring The two isolation rings 12 are both made of magnetic isolation material (the specific material is selected according to actual needs), and the center of the side wall of the two isolation rings 11 is provided with a through hole matching the self-sealing oil injection piece 9. The isolation function of the isolation ring 11 can not only effectively avoid the magnetic suction cup 10 on the same side from being affected by the magnetic force, but also facilitate the lubricating oil injected by the self-sealing oil injection piece 9 to effectively enter the inner cavity of the sealing cover 5 and the moving ring 6. The side wall of the sealing cover 5 is fixedly inlaid with the self-sealing oil injection piece 9, and the self-sealing oil injection piece 9 penetrates into the interior of the sealing cover 5.

[0029] The second implementation method:

[0030] Figure 2 , 5, 6, 7 and 8 show that the self-sealing oil filling piece 9 includes an oil filling pipe 901, a fixing ring 902 is fixedly connected to the opening of the oil filling pipe 901, a self-sealing silicone sleeve 904 is fixedly connected to the inner wall of the fixing ring 902, a leak-proof ball 903 is placed between the self-sealing silicone sleeve 904 and the fixing ring 902, the diameter of the self-sealing silicone sleeve 904 is larger than the caliber of the fixing ring 902, the fixing ring 902 and the leak-proof ball 903 are both made of silicone material, and a silicone sealing ring is fixedly connected to the port where the fixing ring 902 contacts the leak-proof ball 903, which not only uses the same material to enhance the sealing between the fixing ring 902 and the leak-proof ball 903, but also effectively reduces the fixing ring 902 and the leak-proof ball 903. To prevent the wear caused by the friction of the leakage ball 903, a plurality of flow holes 905 are opened on the side wall of the self-sealing silicone sleeve 904 away from the fixed ring 902, which is conducive to reducing the injection speed of the lubricating oil. An oil pipe 906 is also inserted in the fixed ring 902, and an oil outlet is opened on the side wall of the oil pipe 906. When the oil pipe 906 is inserted into the self-sealing oil filling piece 9 to fill oil, the anti-leakage ball 903 inside the self-sealing oil filling piece 9 moves inward and the self-sealing silicone sleeve 904 is subjected to tension, so that the flow holes 905 on the self-sealing silicone sleeve 904 are opened, and the injection of sealing lubricating oil is realized, which effectively solves the problem that most of the existing equipment is inconvenient to add lubricating oil and has no self-lubricating effect.

[0031] The working principle of this scheme is as follows: lubricating oil is pre-filled into the enclosed space surrounded by the moving ring 6 and the sealing cover 5, and the lubricating oil is transported to the inside of the rotating machinery through the rotating shaft body 1, spring 1 3 and spring seat 4 in the working state, so as to automatically provide lubricating oil to the inside. As the working time of the seal increases, the internal lubricating oil is gradually consumed. At this time, the two magnetic suction cups 10 are magnetically attracted to each other, so that the moving ring 6 is moved closer to the sealing cover 5, and the lubricating oil is squeezed by the reduction of the space between the moving ring 6 and the sealing cover 5, so that the lubricating oil maintains a close contact with the sealing part. As the lubricating oil is further consumed, the moving ring 6 and the sealing cover 5 are closer and closer, and the internal lubricating oil can be known from the scale line 501. The amount of oil injected can be determined by the scale line 501. When the oil pipe 906 is pulled out, the self-sealing silicone sleeve 904 is subjected to tension and retracts under the action of the rebound force of the self-sealing silicone sleeve 904, thereby achieving sealing. The oil hole 905 is also closed to further seal the oil.

[0032] In view of current practical needs, the protection scope of the above-mentioned implementation mode adopted by this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A seal with self-lubricating effect, characterized in that: The invention comprises a stationary ring (2) and a spring seat (4), wherein a rotating shaft (1) is installed between the stationary ring (2) and the spring seat (4), a spring 1 (3) is installed between the stationary ring (2) and the spring seat (4), a sealing cover (5) is sleeved on the outer wall of the stationary ring (2), a dynamic ring (6) is sleeved on the outer wall of the spring seat (4), a dynamic ring sealing ring (7) is nested between the spring seat (4) and the dynamic ring (6), a telescopic groove is provided at one end of the dynamic ring (6) close to the sealing cover (5), the sealing cover (5) is inserted into the telescopic groove, a spring 2 (8) is fixedly connected between one end of the sealing cover (5) located in the telescopic groove and the bottom of the telescopic groove, and the sealing cover (5) and the dynamic ring (6) are connected to each other. A pair of magnetic suction cups (10) are fixedly connected to the inner wall, and each pair of two magnetic suction cups (10) are placed inside and outside, and the magnetic suction cups (10) include a magnetic seat (1001), and the side wall of the magnetic seat (1001) is fixedly inlaid with a magnetic ring (1002), and the two opposite magnetic rings (1002) are magnetically attracted to each other, and an isolation ring 1 (11) is fixedly connected between the two magnetic suction cups (10) located on the sealing cover (5), and an isolation ring 2 (12) is fixedly connected between the two magnetic suction cups (10) located on the moving ring (6), and a self-sealing oil injection piece (9) is fixedly inlaid on the side wall of the sealing cover (5), and the self-sealing oil injection piece (9) penetrates into the interior of the sealing cover (5).

2. A seal with self-lubricating effect according to claim 1, characterized in that: The self-sealing oil injection piece (9) comprises an oil injection pipe (901), a fixing ring (902) is fixedly connected to the opening of the oil injection pipe (901), a self-sealing silicone sleeve (904) is fixedly connected to the inner wall of the fixing ring (902), an anti-leakage ball (903) is placed between the self-sealing silicone sleeve (904) and the fixing ring (902), and a plurality of flow holes (905) are provided on the side wall of the self-sealing silicone sleeve (904) away from the fixing ring (902).

3. A seal with self-lubricating effect according to claim 1, characterized in that: The isolation ring 1 (11) and the isolation ring 2 (12) are both made of magnetic isolation material, and the side wall of the isolation ring 1 (11) is provided with a through hole matching the self-sealing oil injection piece (9).

4. A seal with self-lubricating effect according to claim 2, characterized in that: The diameter of the self-sealing silicone sleeve (904) is larger than the caliber of the fixing ring (902); the fixing ring (902) and the leak-proof ball (903) are both made of silicone material; a silicone sealing ring is fixedly connected to the port where the fixing ring (902) contacts the leak-proof ball (903).

5. The seal with self-lubricating effect according to claim 1, characterized in that: The outer wall of the sealing cover (5) close to the moving ring (6) is engraved with scale lines (501), and the scale lines (501) are coated with fluorescent material.

6. A seal with self-lubricating effect according to claim 2, characterized in that: An oil delivery pipe (906) is also inserted into the fixing ring (902), and an oil outlet is provided on the side wall of the oil delivery pipe (906).

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