An adjustable mechanical seal assembly

Abstract

The utility model discloses an adjustable mechanical seal assembly, specifically relates to seal assembly technical field, including main rotating shaft and seal mounting panel, and the outer end surface of main rotating shaft is equipped with seal support sleeve, and one end of seal support sleeve is equipped with limit baffle ring, and the outer end surface of seal support sleeve is equipped with first seal ring, and the outer end surface of seal support sleeve is equipped with second seal ring on the side away from seal mounting panel. The utility model is actually used, through the corresponding setting state of first seal ring, second seal ring, third seal ring, butt joint boss and butt joint recess, can seal the junction of seal mounting panel through first seal ring and second seal ring, and the sealability of the junction of main rotating shaft and seal mounting panel is better simultaneously in the vibration of main rotating shaft makes the displacement of the adhesion of second seal ring and third seal ring, and butt joint boss and butt joint recess can avoid the adhesion sealability of second seal ring and third seal ring, makes the sealability of the junction of main rotating shaft and seal mounting panel better.

Description

Technical Field

[0001] This utility model relates to the field of sealing component technology, and more specifically, to an adjustable mechanical seal component. Background Technology

[0002] Mechanical seals are devices that prevent fluid leakage by forming at least one pair of end faces perpendicular to the axis of rotation that are in contact and slide relative to each other under the action of fluid pressure, the elastic force of the compensation mechanism, and the cooperation of auxiliary seals. Mechanical seal components require specific sealing structures to seal the machinery. They cannot be adjusted according to the operating environment of the machinery and need to be replaced, which is cumbersome. To address this issue, an adjustable mechanical seal component is proposed. For example, patent CN220980327U discloses an adjustable mechanical seal device. By setting a spring, the rotating ring is continuously compressed by the spring during rotation, preventing significant displacement of the rotating ring's position. The spring also acts as a stress reliever, reducing the probability of damage to the rotating ring and thus greatly improving the sealing effect of the device. Secondly, when the mechanical seal is activated, the main shaft rotates, and the rotating ring remains in contact, subjected to the centrifugal force and friction of the main shaft, causing the rotating ring to fit tightly against the stationary ring, thereby achieving a sealing effect.

[0003] When the above-mentioned device is in use, the interlayer and retaining ring configuration allows the retaining ring to be clamped onto both sides of the interlayer when the protective ring needs to be engaged inside the rotating ring. This allows the interlayer to be embedded into the protective ring along the retaining ring. Through this structure, the inner diameter of the rotating ring can be shortened due to the addition of the protective ring when it is connected to the protective ring. However, the compensating ring cannot apply pressure to the support spring, making it impossible for the rotating ring and the compensating ring to fit together. At the same time, the vibration generated on the main rotating shaft can easily cause the stationary ring to shift, thereby affecting the sealing effect of the mechanical seal assembly. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an adjustable mechanical seal assembly. The technical problem to be solved by the present invention is: how to make the adjustable mechanical seal assembly have better sealing performance.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an adjustable mechanical seal assembly, comprising a main rotating shaft and a sealing mounting plate, wherein a sealing support sleeve is provided on the outer end face of the main rotating shaft, a limiting retaining ring is provided at one end of the sealing support sleeve, a first sealing ring is provided on the outer end face of the sealing support sleeve, a second sealing ring is provided on the side of the outer end face of the sealing support sleeve away from the sealing mounting plate, and a third sealing ring is provided on the outer side of one end of the second sealing ring; The third sealing ring has a top ring at the end away from the second sealing ring. The outer end face of the second and third sealing rings on the same side has a mating protrusion, and the inner end face of the top ring and the third sealing ring on the same side has a mating groove.

[0006] In a preferred embodiment, the outer end face of one side of the main rotating shaft is provided with a plurality of concave keyways, and the inner end face of the limiting ring is provided with a plurality of convex key blocks.

[0007] In a preferred embodiment, the outer end face of the sealing mounting plate is provided with a plurality of mounting holes, and the sealing mounting plate is mounted on the outer end face of the sealing support sleeve.

[0008] In a preferred embodiment, the outer end face of the sealing support sleeve is provided with a pressure ring on the side away from the top ring, and a retaining ring groove is provided on one end face of the top ring.

[0009] In a preferred embodiment, a compression spring is provided inside the snap ring groove.

[0010] In a preferred embodiment, the outer end face of the pressure ring is provided with a locking nut on the side away from the top ring, and the inner end face of the locking nut is provided with a limiting protrusion. The first sealing ring, the second sealing ring and the third sealing ring are all rubber components.

[0011] In a preferred embodiment, the outer end face of the sealing support sleeve has a threaded groove on the side away from the limiting stop ring, and the inner end faces of the first sealing ring, the second sealing ring and the third sealing ring are in contact with the outer end face of the sealing support sleeve.

[0012] In a preferred embodiment, the inner end face of the sealing support sleeve is in contact with the outer end face of the main rotating shaft, a gap is reserved between the outer end face of the sealing support sleeve and the inner end face of the sealing mounting plate and the top ring, and the outer end face of the mating protrusion is in contact with the inner end face of the mating groove.

[0013] In a preferred embodiment, the inner end face of the concave keyway is in contact with the outer end face of the convex key block, and the inner end face of the locking nut is threadedly connected to the outer end face of the sealing support sleeve.

[0014] In a preferred embodiment, the thickness of the compression spring in the right-view direction is in contact with the inner end face of the retaining ring groove, and the pressure ring and the top ring have the same specifications and are set in a mirror image state in the main-view direction.

[0015] The technical effects and advantages of this utility model are as follows: In actual use, with the corresponding arrangement of the first sealing ring, the second sealing ring, the third sealing ring, the mating protrusion and the mating groove, the connection of the sealing mounting plate can be sealed by the first sealing ring and the second sealing ring. At the same time, the vibration generated by the main rotating shaft will cause the contact point of the second sealing ring and the third sealing ring to shift. The mating protrusion and the mating groove will prevent the sealing performance of the contact point of the second sealing ring and the third sealing ring from deteriorating, thus making the sealing performance of the connection between the main rotating shaft and the sealing mounting plate better. Meanwhile, with the corresponding settings of the snap ring groove, pressure ring, locking nut, and limiting protrusion, the locking nut can be rotated, and the locking nut will be connected to the sealing support sleeve through the thread. The locking nut will apply pressure to the compression spring through the pressure ring, and the compression spring will press against the top ring, so that the top ring, the third sealing ring, and the second sealing ring are always in close contact, thereby ensuring better sealing at the connection between the main rotating shaft, the sealing mounting plate, and the sealing support sleeve. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the overall front view cross-sectional structure of this utility model.

[0018] Figure 3 This utility model Figure 2 Enlarged view of section A.

[0019] Figure 4 This is a schematic diagram of the overall cross-sectional connection structure of this utility model.

[0020] The attached figures are labeled as follows: 1 Main rotating shaft, 2 Sealing mounting plate, 3 Concave keyway, 4 Mounting hole, 5 Limiting ring, 6 Sealing support sleeve, 7 Top ring, 8 Third sealing ring, 9 Connecting protrusion, 10 Connecting groove, 11 Snap ring groove, 12 First sealing ring, 13 Convex key block, 14 Second sealing ring, 15 Compression spring, 16 Pressure ring, 17 Locking nut, 18 Limiting protrusion. Detailed Implementation

[0021] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0022] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more exemplary embodiments. Numerous specific details are provided in the following description to give a full understanding of exemplary embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced with one or more of the specific details omitted, or other methods, components, steps, etc., can be employed. In other instances, well-known structures, methods, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0023] This utility model provides an adjustable mechanical seal assembly, such as... Figure 1 and 2 As shown, it includes a main rotating shaft 1 and a sealing mounting plate 2. The outer end face of the main rotating shaft 1 is provided with a sealing support sleeve 6. One end of the sealing support sleeve 6 is provided with a limiting retaining ring 5. When installing the main rotating shaft 1 and the sealing mounting plate 2, the sealing support sleeve 6 is fitted onto the outer end face of the main rotating shaft 1. The outer end face of one side of the main rotating shaft 1 is provided with multiple concave keyways 3, and the outer end face of the sealing mounting plate 2 is provided with multiple mounting holes 4. The sealing mounting plate 2 is installed on the outer end face of the sealing support sleeve 6. The outer end face of the sealing support sleeve 6 has a threaded groove on the side away from the limiting ring 5, and the inner end face of the sealing support sleeve 6 is in contact with the outer end face of the main rotating shaft 1.

[0024] like Figure 3 and 4 As shown, the outer end face of the sealing support sleeve 6 is provided with a first sealing ring 12, and the outer end face of the sealing support sleeve 6 is provided with a second sealing ring 14 on the side away from the sealing mounting plate 2, and a third sealing ring 8 is provided on the outer side of one end of the second sealing ring 14. The first sealing ring 12 and the sealing mounting plate 2 are sequentially placed on the outer end face of the sealing support sleeve 6. Then the second sealing ring 14 and the third sealing ring 8 can be clamped on the outer end face of the sealing support sleeve 6, and the limiting ring 5, the first sealing ring 12, the sealing mounting plate 2 and the second sealing ring 14 are put together. The third sealing ring 8 has a top ring 7 at the end away from the second sealing ring 14. The top ring 7 is fitted onto the outer end face of the sealing support sleeve 6. The outer end face of the second sealing ring 14 and the third sealing ring 8 on the same side has a mating protrusion 9. The inner end face of the top ring 7 and the third sealing ring 8 on the same side has a mating groove 10. The inner end face of the limiting ring 5 is provided with multiple convex key blocks 13, and the top ring 7, the third sealing ring 8 and the second sealing ring 14 are fitted together by the docking protrusion 9 and the docking groove 10, so that their connection is more stable and the sealing is better. The outer end face of the pressure ring 16 is provided with a locking nut 17 on the side away from the top ring 7. The end face of the top ring 7 is provided with a snap ring groove 11, and a compression spring 15 is provided inside the snap ring groove 11. The inner end face of the locking nut 17 is provided with a limiting protrusion 18, and the outer end face of the sealing support sleeve 6 is provided with a pressure ring 16 on the side away from the top ring 7. The first sealing ring 12, the second sealing ring 14 and the third sealing ring 8 are all rubber components. After the top ring 7 is installed, the compression spring 15 can be locked inside the snap ring groove 11, so that the compression spring 15 is connected and fixed with the top ring 7 and the pressure ring 16. Then it can be installed on the outer end face of the sealing support sleeve 6. Then the workers will install the locking nut 17 on one side of the outer end face of the sealing support sleeve 6, so that the locking nut 17 is installed on the outer end face of the sealing support sleeve 6 by means of threads. The inner end faces of the first sealing ring 12, the second sealing ring 14 and the third sealing ring 8 are in contact with the outer end face of the sealing support sleeve 6, and a gap is reserved between the outer end face of the sealing support sleeve 6 and the inner end face of the sealing mounting plate 2 and the top ring 7. The outer end face of the mating protrusion 9 is in contact with the inner end face of the mating groove 10, the inner end face of the concave keyway 3 is in contact with the outer end face of the convex key block 13, and the inner end face of the locking nut 17 is threadedly connected to the outer end face of the sealing support sleeve 6. The thickness of the compression spring 15 in the right-view direction is in contact with the inner end face of the snap ring groove 11. The compression ring 16 and the top ring 7 have the same specifications and are set in a mirror image in the main-view direction. The compression spring 15 will press against the top ring 7, and the top ring 7 will apply pressure to the third sealing ring 8 and the second sealing ring 14 to make their fit more stable.

[0025] Finally, it should be noted that: the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable mechanical seal assembly, comprising a main rotating shaft (1) and a seal mounting plate (2), characterized in that: The outer end face of the main rotating shaft (1) is provided with a sealing support sleeve (6), one end of the sealing support sleeve (6) is provided with a limiting stop ring (5), the outer end face of the sealing support sleeve (6) is provided with a first sealing ring (12), the outer end face of the sealing support sleeve (6) is provided with a second sealing ring (14) on the side away from the sealing mounting plate (2), and a third sealing ring (8) is provided on the outer side of one end of the second sealing ring (14). The third sealing ring (8) has a top ring (7) at the end away from the second sealing ring (14), and the outer end face of the same side of the second sealing ring (14) and the third sealing ring (8) has a mating protrusion (9), and the inner end face of the same side of the top ring (7) and the third sealing ring (8) has a mating groove (10).

2. The adjustable mechanical seal assembly according to claim 1, characterized in that: The outer end face of the main rotating shaft (1) is provided with multiple concave keyways (3), and the inner end face of the limiting ring (5) is provided with multiple convex key blocks (13).

3. An adjustable mechanical seal assembly according to claim 1, characterized in that: The outer end face of the sealing mounting plate (2) is provided with multiple mounting holes (4), and the sealing mounting plate (2) is installed on the outer end face of the sealing support sleeve (6).

4. An adjustable mechanical seal assembly according to claim 1, characterized in that: The outer end face of the sealing support sleeve (6) is provided with a pressure ring (16) on the side away from the top ring (7), and a snap ring groove (11) is provided on one side end face of the top ring (7).

5. An adjustable mechanical seal assembly according to claim 4, characterized in that: The retaining ring groove (11) is provided with a compression spring (15).

6. An adjustable mechanical seal assembly according to claim 4, characterized in that: The outer end face of the pressure ring (16) is provided with a locking nut (17) on the side away from the top ring (7), and the inner end face of the locking nut (17) is provided with a limiting protrusion (18).

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