Metal non-contact mechanical sealing device

Abstract

The utility model relates to the technical field of mechanical sealing, and discloses a metal non-contact type mechanical sealing device which comprises an inner ring plate and an outer ring plate, the outer ring plate is arranged outside the inner ring plate, a sealing mechanism is arranged on the inner ring plate, the sealing mechanism comprises two first sealing plates, and the two first sealing plates are oppositely arranged. First mounting grooves are formed in the front side and the rear side of the inner ring plate correspondingly, and the first sealing plates are placed in the first mounting grooves and matched with the first mounting grooves. Through the design of the sealing mechanism, the opening angle of the first dustproof ring strip is increased in the direction of the inner ring plate, and the opening angle of the second dustproof ring strip is opposite, so that external dust is firstly blocked by the second dustproof ring strip on the outer side when entering, and is further blocked by the first dustproof ring strip when passing through the first dustproof ring strip; the blocked dust is not prone to falling off, the situation that the dust further enters the space between the inner ring plate and the outer ring plate can be avoided, and the sealing performance is properly enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a metal non-contact mechanical seal device. Background Art

[0002] Bearings are a common metal mechanical sealing device, and bearings are divided into non-contact seals and contact seals. Non-contact seals are a sealing method that retains a small gap between the inner ring of the bearing and the seal. The sealing component used in this sealing method does not contact the rotating body itself, which can effectively reduce friction and wear and is more suitable for applications that require high-speed rotation.

[0003] Patent website announcement number CN219888524U discloses a non-contact bearing sealing structure, including a bearing inner ring and a bearing outer ring, a plurality of bearing balls are arranged between the bearing inner ring and the bearing outer ring, and sealing pads are respectively arranged on the upper and lower sides between the bearing inner ring and the bearing outer ring, a group of outer ring sealing grooves are opened on the inner wall of the bearing outer ring, a sealing ring is arranged at the lower outer side of the sealing pad, and the corresponding sealing ring is arranged in the outer ring sealing groove, a group of inner ring sealing grooves are opened on the inner wall of the bearing inner ring, and a sealing assembly is arranged in the inner ring sealing groove. The sealing assembly includes a group of sealing card surfaces arranged in the inner ring sealing groove, a grease guide lip is arranged at the lower inner side of the sealing pad, and a plurality of grease storage lips are arranged on the inner side of the grease guide lip. The plurality of grease storage lips are arranged indirectly with a group of sealing card surfaces, which can improve the sealing performance of the non-contact bearing.

[0004] In the above device, the sealing performance of the device is enhanced by indirectly setting the grease lip and the sealing card surface to prevent the invasion of external impurities. However, in fact, in order to ensure the sealing performance at high speeds, a gap is bound to exist between the sealing ring and the inner ring of the bearing due to the non-contact seal. Although the grease guide lip is set to enhance the sealing performance, the existence of the gap still cannot completely prevent the entry of impurities such as dust. Once the dust enters here and further enters the interior of the bearing, it will cause damage to the interior of the bearing and affect its service life. Utility Model Content

[0005] In order to solve the above-mentioned problems, the utility model provides a metal non-contact mechanical sealing device.

[0006] The utility model provides a metal non-contact mechanical sealing device adopts the following technical solutions:

[0007] A metal non-contact mechanical sealing device comprises an inner ring plate and an outer ring plate, wherein the outer ring plate is arranged outside the inner ring plate, and a sealing mechanism is arranged on the inner ring plate;

[0008] The sealing mechanism includes two first sealing plates, wherein the front and rear sides of the inner ring plate are provided with a first mounting groove, the first sealing plate is placed inside the first mounting groove and matches the first mounting groove, and a second sealing plate is provided outside the first mounting groove, the front and rear sides of the outer ring plate are provided with a second mounting groove, the second sealing plate is placed inside the second mounting groove and matches the second mounting groove, the second sealing plate extends into the first mounting groove, and an annular groove is provided on the inner side of the second sealing plate, an extension plate is integrally formed on the outer side of the first sealing plate, the extension plate extends into the annular groove, a first dust ring strip is integrally formed on one side of the extension plate tending to the inner ring plate, and a second dust ring strip is integrally formed on the other side of the extension plate, the first dust ring strip and the second dust ring strip are arranged at equal intervals on the extension plate, and positioning grooves are provided on the front and rear side walls of the outer ring plate, and an annular positioning plate is placed inside the positioning groove.

[0009] By adopting the above technical solution, when the inner ring plate rotates, the first sealing plate rotates with the inner ring plate, while the outer ring plate does not rotate. There is a small gap between the second sealing plate and the inner ring plate, and there is a small gap between the extension plate, the first dustproof ring strip, the second dustproof ring strip and the inner side wall of the annular groove of the second sealing plate, thereby realizing the function of non-contact sealing. The opening angle of the first dustproof ring strip increases along the direction of the inner ring plate, while the second dustproof ring strip is the opposite. Therefore, when external dust enters, it will first be blocked by the second dustproof ring strip on the outside, and when passing through the first dustproof ring strip, it will be further blocked by the first dustproof ring strip. Due to the existence of the inclination angle, the blocked dust is not easy to fall off, which can prevent the dust from further entering between the inner ring plate and the outer ring plate, thereby properly enhancing the sealing performance.

[0010] Preferably, an insert rod is integrally formed on the annular positioning plate, a slot is provided on the second sealing plate, the insert rod passes through the slot and matches the slot, one end of the insert rod fits with the inside of the first mounting groove, and the second sealing plate fits with the annular positioning plate.

[0011] By adopting the above technical solution, the annular positioning plate squeezes and fixes the second sealing plate.

[0012] Preferably, the insertion rods are distributed around the annular positioning plate at equal intervals, and the slots are distributed around the second sealing plate at equal intervals.

[0013] By adopting the above technical solution, the insertion rod passes through the slot, further improving the stability of the second sealing plate.

[0014] Preferably, the inner ring plate is fixedly connected to a first rectangular plate on both the front and rear sides, the first rectangular plate is arranged inside the first mounting groove, and the first rectangular plates are distributed around the first mounting groove at equal intervals, the outer ring plate is fixedly connected to a second rectangular plate on both the front and rear sides, the second rectangular plate is arranged inside the positioning groove, and the second rectangular plates are distributed around the positioning groove at equal intervals, the first sealing plate is fixedly connected to a first positioning seat, the annular positioning plate is fixedly connected to a second positioning seat, and the first rectangular plate and the second rectangular plate pass through the first positioning seat and the second positioning seat respectively.

[0015] By adopting the above technical solution, the first sealing plate and the second sealing plate are installed and fixed by inserting the first rectangular plate and the second rectangular plate into the first positioning seat and the second positioning seat.

[0016] Preferably, the first positioning seat and the second positioning seat are both slidably connected with an inserting plate, the inserting plate passes through the first rectangular plate and the second rectangular plate respectively, and a rectangular frame is fixedly connected to the inserting plate. A through slot is provided on one side wall of the first positioning seat and the second positioning seat, and the rectangular frame passes through the through slot and matches the through slot. Two limiting plates are fixedly connected to the first positioning seat and the second positioning seat, and the rectangular frame is arranged between the two limiting plates. A spring is fixedly connected to the first positioning seat and the second positioning seat, and the spring is fixedly connected to the inserting plate.

[0017] By adopting the above technical solution, the reed exerts an elastic force on the plug board.

[0018] Preferably, a connecting plate is slidably connected to the inside of the rectangular frame, a spring is fixedly connected to the inside of the rectangular frame, one end of the spring is fixedly connected to the connecting plate, one side of the connecting plate is fixedly connected to a round rod, the round rod extends out of the rectangular frame, one end of the round rod is fixedly connected to a control plate, a limiting groove is provided on the limiting plate, the control plate extends into the limiting groove and matches the limiting groove.

[0019] By adopting the above technical solution, the spring exerts an elastic force on the connecting plate.

[0020] Preferably, a ball is provided between the inner ring plate and the outer ring plate, and the outer sides of the ball are in contact with the outer side of the inner ring plate and the inner side of the outer ring plate respectively.

[0021] By adopting the above technical solution, the balls roll between the inner ring plate and the outer ring plate.

[0022] In summary, the present invention has the following beneficial technical effects:

[0023] 1. A metal non-contact mechanical seal device. Through the design of the sealing mechanism, the opening angle of the first dustproof ring increases along the direction of the inner ring plate, while the opening angle of the second dustproof ring increases in the opposite direction. Therefore, when external dust enters, it will first be blocked by the second dustproof ring on the outside, and will be further blocked by the first dustproof ring when passing through the first dustproof ring. In addition, due to the existence of the inclined angle, the blocked dust is not easy to fall off, which can prevent dust from further entering between the inner ring plate and the outer ring plate, thereby properly enhancing the sealing performance.

[0024] 2. A metal non-contact mechanical sealing device, which pulls the control plate in the direction of the principle rectangular frame until the control plate leaves the limiting groove. The elastic force of the spring pulls the plug plate to leave the first rectangular plate and the second rectangular plate, thereby quickly realizing the disassembly of the first sealing plate and the second sealing plate. After disassembly, the first dust ring strip and the second dust ring strip can be quickly cleaned to ensure the subsequent sealing and dustproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 It is a cross-sectional view of the structure of the utility model;

[0027] Figure 3 for Figure 2 A magnified view of point A in the figure;

[0028] Figure 4 This is a disassembled diagram of the utility model;

[0029] Figure 5 This is a structural diagram of the control panel moving to one side of the limiting panel in the present invention;

[0030] Figure 6 This is a cross-sectional view of the structure of the inner ring plate in the present invention;

[0031] Figure 7 This is a structural sectional view of the outer ring plate in the utility model.

[0032] Explanation of the accompanying drawings: 1. Inner ring plate; 2. Outer ring plate; 3. Sealing mechanism; 31. First sealing plate; 32. First mounting groove; 33. Second sealing plate; 34. Second mounting groove; 35. Annular groove; 36. Extension plate; 37. First dustproof ring strip; 38. Second dustproof ring strip; 39. Positioning groove; 391. Annular positioning plate; 392. Insert rod; 393. Slot; 394. First rectangular plate; 395. Second rectangular plate; 396. First positioning seat; 397. Second positioning seat; 398. Insert plate; 399. Rectangular frame; 381. Limiting plate; 382. Spring; 383. Connecting plate; 384. Spring; 385. Control plate; 386. Limiting groove; 4. Ball. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1 -Attached Figure 4 The utility model is described in further detail.

[0034] The utility model discloses a metal non-contact mechanical sealing device. Figures 1-4 , including an inner ring plate 1 and an outer ring plate 2. The outer ring plate 2 is arranged outside the inner ring plate 1. The inner ring plate 1 is provided with a sealing mechanism 3. The sealing mechanism 3 includes two first sealing plates 31. First mounting grooves 32 are opened on the front and rear sides of the inner ring plate 1. The first sealing plates 31 are placed inside the first mounting grooves 32 and match the first mounting grooves 32. A second sealing plate 33 is provided outside the first mounting grooves 32.

[0035] The outer ring plate 2 is provided with a second mounting groove 34 on both the front and rear sides. The second sealing plate 33 is placed inside the second mounting groove 34 and matches the second mounting groove 34. The second sealing plate 33 extends into the first mounting groove 32. An annular groove 35 is provided on the inner side of the second sealing plate 33. An extension plate 36 is integrally formed on the outer side of the first sealing plate 31. The extension plate 36 extends into the annular groove 35. A first dustproof ring strip 37 is integrally formed on the side of the extension plate 36 that tends to the inner ring plate 1. A second dustproof ring strip 38 is integrally formed on the other side of the extension plate 36. The first dustproof ring strip 37 and the second dustproof ring strip 38 are evenly spaced and arranged on the extension plate 36.

[0036] The outer ring plate 2 is provided with a positioning groove 39 on the front and rear side walls, and an annular positioning plate 391 is placed inside the positioning groove 39. When the inner ring plate 1 rotates, the first sealing plate 31 rotates with the inner ring plate 1, while the outer ring plate 2 does not rotate. There is a small gap between the second sealing plate 33 and the inner ring plate 1, and there is a small gap between the extension plate 36, the first dustproof ring strip 37 and the second dustproof ring strip 38 and the inner side wall of the annular groove 35 of the second sealing plate 33, thereby realizing the function of non-contact sealing. The opening angle of the first dustproof ring strip 37 increases along the direction of the inner ring plate 1, while the opening angle of the second dustproof ring strip 38 is the opposite. Therefore, when external dust enters, it will first be blocked by the outer second dustproof ring strip 38, and when passing through the first dustproof ring strip 37, it will be further blocked by the first dustproof ring strip 37. Due to the existence of the inclined angle, the blocked dust is not easy to fall off, which can prevent dust from further entering between the inner ring plate 1 and the outer ring plate 2, thereby properly enhancing the sealing performance.

[0037] An insert rod 392 is integrally formed on the annular positioning plate 391, and a slot 393 is provided on the second sealing plate 33. The insert rod 392 passes through the slot 393 and matches the slot 393. One end of the insert rod 392 fits in the interior of the first mounting groove 32. The second sealing plate 33 fits in the annular positioning plate 391. The annular positioning plate 391 squeezes and fixes the second sealing plate 33. The insert rods 392 are evenly spaced and distributed around the annular positioning plate 391. The slots 393 are evenly spaced and distributed around the second sealing plate 33. The insert rod 392 passes through the slot 393, further improving the stability of the second sealing plate 33.

[0038] The inner ring plate 1 is fixedly connected to the first rectangular plate 394 on both the front and rear sides. The first rectangular plate 394 is arranged inside the first mounting groove 32, and the first rectangular plates 394 are evenly spaced and distributed around the first mounting groove 32. The outer ring plate 2 is fixedly connected to the second rectangular plate 395 on both the front and rear sides. The second rectangular plates 395 are arranged inside the positioning groove 39, and the second rectangular plates 395 are evenly spaced and distributed around the positioning groove 39. The first sealing plate 31 is fixedly connected to the first positioning seat 396, and the annular positioning plate 391 is fixedly connected to the second positioning seat 397. The first rectangular plate 394 and the second rectangular plate 395 pass through the first positioning seat 396 and the second positioning seat 397 respectively. The first sealing plate 31 and the second sealing plate 33 are installed and fixed by inserting the first rectangular plate 394 and the second rectangular plate 395 into the first positioning seat 396 and the second positioning seat 397.

[0039] The first positioning seat 396 and the second positioning seat 397 are both slidably connected with an insert plate 398, which passes through the first rectangular plate 394 and the second rectangular plate 395 respectively. A rectangular frame 399 is fixedly connected to the insert plate 398. A through slot is provided on one side wall of the first positioning seat 396 and the second positioning seat 397. The rectangular frame 399 passes through the through slot and matches the through slot. Two limiting plates 381 are fixedly connected to the first positioning seat 396 and the second positioning seat 397. The rectangular frame 399 is arranged between the two limiting plates 381. A spring 382 is fixedly connected to the first positioning seat 396 and the second positioning seat 397. The spring 382 is fixedly connected to the insert plate 398, and the spring 382 exerts an elastic force on the insert plate 398.

[0040] The rectangular frame 399 is slidably connected to a connecting plate 383, and the rectangular frame 399 is fixedly connected to a spring 384. One end of the spring 384 is fixedly connected to the connecting plate 383. A round rod is fixedly connected to one side of the connecting plate 383. The round rod extends out of the rectangular frame 399, and one end of the round rod is fixedly connected to a control plate 385. A limiting groove 386 is provided on the limiting plate 381, and the control plate 385 extends into the limiting groove 386 and matches the limiting groove 386. The spring 384 exerts an elastic force on the connecting plate 383. A ball 4 is provided between the inner ring plate 1 and the outer ring plate 2. The outer side of the ball 4 contacts the outer side of the inner ring plate 1 and the inner side surface of the outer ring plate 2 respectively, and the ball 4 rolls between the inner ring plate 1 and the outer ring plate 2.

[0041] During actual operation, when this device is used, the inner ring plate 1 is connected to the external shaft. When the external shaft rotates, the outer ring plate 2 is connected to the device to be sealed. Therefore, when the inner ring plate 1 rotates, the outer ring plate 2 does not rotate. When the inner ring plate 1 rotates, it drives the first rectangular plate 394 to rotate, and the first rectangular plate 394 drives the first positioning seat 396 to rotate, and the first positioning seat 396 drives the first sealing plate 31 to rotate. When rotating at high speed, a small gap exists between the second sealing plate 33 and the inner ring plate 1. There are small gaps between the extension plate 36, the first dust ring strip 37, and the second dust ring strip 38 and the inner side wall of the annular groove 35 of the second sealing plate 33, thereby realizing the function of non-contact sealing.

[0042] The opening angle of the first dustproof ring strip 37 increases in the direction of the inner ring plate 1, while the opening angle of the second dustproof ring strip 38 is opposite. Therefore, when external dust enters, it will first be blocked by the second dustproof ring strip 38 on the outside, and will be further blocked by the first dustproof ring strip 37 when passing through the first dustproof ring strip 37. Due to the existence of the inclined angle, the blocked dust will accumulate at the intersection of the first dustproof ring strip 37 and the second dustproof ring strip 38 with the extension plate 36, making it difficult to fall off, thereby preventing dust from further entering between the inner ring plate 1 and the outer ring plate 2, thereby properly enhancing the sealing performance.

[0043] When it is necessary to clean the first dustproof ring strip 37 and the second dustproof ring strip 38, the control plate 385 is directly pulled in the direction of the principle rectangular frame 399 until the control plate 385 leaves the limiting groove 386. The elastic force of the spring 382 pulls the plug plate 398 to leave the first rectangular plate 394 and the second rectangular plate 395. At this time, the first rectangular plate 394 and the second rectangular plate 395 can be pulled out from the first positioning seat 396 and the second positioning seat 397 respectively, thereby realizing the disassembly of the first sealing plate 31 and the second sealing plate 33. After disassembly, the first dustproof ring strip 37 and the second dustproof ring strip 38 can be quickly cleaned to ensure the subsequent sealing and dustproof performance;

[0044] Finally, when installing the first sealing plate 31 and the second sealing plate 33, repeat the above steps to make the insert plate 398 pass through the first rectangular plate 394 and the second rectangular plate 395, and at the same time, pull the control plate 385 to one side of the limiting groove 386. Due to the tension of the spring 384, the control plate 385 can be pulled into the limiting groove 386, and since the elastic tension of the spring 382 acts on the insert plate 398 at this time, it will also cause the control plate 385 to be tightly attached to the inside of the limiting groove 386 along the direction of the elastic tension of the spring 382, ​​thereby effectively ensuring the stability of the first sealing plate 31 and the second sealing plate 33 after installation.

[0045] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A metal non-contact mechanical seal device, comprising an inner ring plate (1) and an outer ring plate (2), characterized in that: The outer ring plate (2) is arranged outside the inner ring plate (1), and a sealing mechanism (3) is provided on the inner ring plate (1); The sealing mechanism (3) includes two first sealing plates (31), the front and rear sides of the inner ring plate (1) are both provided with first mounting grooves (32), the first sealing plate (31) is placed inside the first mounting groove (32) and matches the first mounting groove (32), a second sealing plate (33) is provided outside the first mounting groove (32), the front and rear sides of the outer ring plate (2) are both provided with second mounting grooves (34), the second sealing plate (33) is placed inside the second mounting groove (34) and matches the second mounting groove (34), the second sealing plate (33) extends to the inside of the first mounting groove (32), and the inner side of the second sealing plate (33) is provided with a second mounting groove (34). An annular groove (35) is provided, an extension plate (36) is integrally formed on the outer side of the first sealing plate (31), and the extension plate (36) extends into the annular groove (35). A first dustproof ring strip (37) is integrally formed on the side of the extension plate (36) tending to the inner ring plate (1), and a second dustproof ring strip (38) is integrally formed on the other side of the extension plate (36). The first dustproof ring strip (37) and the second dustproof ring strip (38) are both arranged at equal intervals on the extension plate (36), and positioning grooves (39) are provided on the front and rear side walls of the outer ring plate (2), and an annular positioning plate (391) is placed inside the positioning groove (39).

2. A metal non-contact mechanical sealing device according to claim 1, characterized in that: The annular positioning plate (391) is integrally formed with an insert rod (392), the second sealing plate (33) is provided with a slot (393), the insert rod (392) passes through the slot (393) and matches the slot (393), one end of the insert rod (392) is fitted with the inside of the first mounting groove (32), and the second sealing plate (33) is fitted with the annular positioning plate (391).

3. A metal non-contact mechanical sealing device according to claim 2, characterized in that: The inserting rods (392) are distributed around the annular positioning plate (391) at equal intervals, and the slots (393) are distributed around the second sealing plate (33) at equal intervals.

4. The metal non-contact mechanical sealing device according to claim 1, characterized in that: The inner ring plate (1) is fixedly connected to a first rectangular plate (394) on both the front and rear sides. The first rectangular plate (394) is arranged inside the first mounting groove (32), and the first rectangular plates (394) are evenly spaced and distributed around the first mounting groove (32). The outer ring plate (2) is fixedly connected to a second rectangular plate (395) on both the front and rear sides. The second rectangular plate (395) is arranged inside the positioning groove (39), and the second rectangular plates (395) are evenly spaced and distributed around the positioning groove (39). The first sealing plate (31) is fixedly connected to a first positioning seat (396). The annular positioning plate (391) is fixedly connected to a second positioning seat (397). The first rectangular plate (394) and the second rectangular plate (395) respectively pass through the first positioning seat (396) and the second positioning seat (397).

5. The metal non-contact mechanical sealing device according to claim 4, characterized in that: The first positioning seat (396) and the second positioning seat (397) are both slidably connected with an inserting plate (398), and the inserting plate (398) passes through the first rectangular plate (394) and the second rectangular plate (395) respectively. A rectangular frame (399) is fixedly connected to the inserting plate (398). A through slot is provided on one side wall of the first positioning seat (396) and the second positioning seat (397), and the rectangular frame (399) passes through the through slot and matches the through slot. Two limiting plates (381) are fixedly connected to the first positioning seat (396) and the second positioning seat (397), and the rectangular frame (399) is arranged between the two limiting plates (381). A spring (382) is fixedly connected to the first positioning seat (396) and the second positioning seat (397), and the spring (382) is fixedly connected to the inserting plate (398).

6. The metal non-contact mechanical sealing device according to claim 5, characterized in that: The rectangular frame (399) is slidably connected to a connecting plate (383), the rectangular frame (399) is fixedly connected to a spring (384), one end of the spring (384) is fixedly connected to the connecting plate (383), one side of the connecting plate (383) is fixedly connected to a round rod, the round rod extends out of the rectangular frame (399), one end of the round rod is fixedly connected to a control plate (385), a limiting groove (386) is provided on the limiting plate (381), and the control plate (385) extends into the limiting groove (386) and matches the limiting groove (386).

7. The metal non-contact mechanical sealing device according to claim 1, characterized in that: A ball (4) is provided between the inner ring plate (1) and the outer ring plate (2), and the outer side of the ball (4) contacts the outer side of the inner ring plate (1) and the inner side of the outer ring plate (2).

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