CN217558616U - Mechanical sealing element and movable ring device thereof - Google Patents

Abstract

The utility model belongs to the technical field of mechanical seal spare, refer in particular to a mechanical seal spare and rotating ring device thereof and include: the contact ring is provided with a contact surface used for being in contact with the static ring device; the connecting ring seat is linked with the contact ring; the spring is used for being linked with the connecting ring seat and is provided with a linkage end connected with the connecting ring seat and a fixed end fixed on the shaft; the inner edge of the contact ring is provided with a mounting groove, and a sealing ring which is used for being arranged between the shaft and the contact ring in an interference fit mode is arranged in the mounting groove. This patent is through setting up the sealing washer at the interior edge of contact ring, solves the emergence of two kinds of circumstances of leaking of rotating ring subassembly simultaneously through this sealing washer, compares in current structure, and the sealing washer that this patent set up is small in quantity, and the structure is more simple and stable, and the retrenching of structure also can reduce cost moreover, increases its commercial nature.

Description

Mechanical sealing element and movable ring device thereof

Technical Field

The utility model belongs to the technical field of mechanical seal spare, refer in particular to a mechanical seal spare and rotating ring device thereof.

Background

The mechanical sealing element belongs to one of precise mechanical basic elements with complex structures, and is a key part of equipment such as various pumps, reaction synthesis kettles, turbine compressors, submersible motors and the like.

Chinese utility model 2009201460914 discloses a compact mechanical seal, and this mechanical seal has following problem:

1. the movable ring small sealing ring is arranged between the movable ring seat and the shaft, and the movable ring large sealing ring is arranged between the movable ring seat and the movable ring and is respectively used for sealing water flow entering between the driven ring seat and the shaft and water flow entering from the driven ring seat and the movable ring; if one of the sealing rings is abraded, the sealing performance of the moving ring device can be influenced, and the probability that the sealing rings are abraded to influence the sealing performance of the moving ring device is greatly improved due to the fact that the plurality of sealing rings are arranged.

2. The movable ring small sealing ring and the movable ring large sealing ring are respectively arranged on two steps of the movable ring, and the movable ring seat is pushed by the spring to act on one point of the movable ring, so that the movable ring is stressed unevenly, and the movable ring is easy to damage after long-term use, thereby influencing the use.

In order to solve the above problems, a mechanical seal moving ring device with simple structure and good sealing performance is needed.

Disclosure of Invention

The utility model aims at providing a mechanical seal and rotating ring device thereof.

The purpose of the utility model is realized like this:

a dynamic ring assembly for a mechanical seal for mounting on a shaft for use in cooperation with a static ring assembly, comprising:

a contact ring having a contact surface for contacting the stationary ring means;

the connecting ring seat is linked with the contact ring; and

the spring is used for being linked with the connecting ring seat and is provided with a linkage end connected with the connecting ring seat and a fixed end fixed on the shaft;

the inner edge of the contact ring is provided with a mounting groove, a sealing ring for sealing a gap between the shaft and the contact ring is arranged in the mounting groove, and the sealing ring is in interference fit with the shaft and the contact ring respectively.

Furthermore, an embedding groove is formed in the connecting ring seat, and the embedding groove is non-circular in shape; the shape of the contact ring is matched with that of the caulking groove, and when the contact ring is installed in the connecting ring seat, the connecting ring seat is linked with the contact ring.

Further, the mounting groove is disposed on one end of an inner edge of the contact ring and faces the connection ring seat.

Furthermore, an annular partition plate which is abutted against the connecting ring seat and the contact ring is further arranged between the connecting ring seat and the contact ring, and the annular partition plate is used for limiting the sealing ring.

Further, the mounting groove has first lateral wall and the second lateral wall of spacing sealing washer both sides respectively.

Further, a boss part is arranged on the connecting ring seat, and the lower end of the spring is sleeved on the boss part to be linked with the connecting ring seat.

Furthermore, the boss part is provided with a limiting hole, and the linkage end of the spring is provided with a limiting bending section which is used for being placed in the limiting hole.

Furthermore, the connecting ring seat is further provided with a limiting platform on the outer edge of the boss part, and the limiting platform is provided with a limiting convex part used for abutting against the end part of the spring.

Furthermore, a combining ring part sleeved on the shaft is arranged on the fixed end of the spring.

A mechanical seal comprises a static ring device and the dynamic ring device.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

this patent is through setting up the sealing washer at the interior edge of contact ring, solves the emergence of two kinds of circumstances of leaking of rotating ring subassembly simultaneously through this sealing washer, compares in current structure, and the sealing washer that this patent set up is small in quantity, and the structure is more simple and stable, and the retrenching of structure also can reduce cost moreover, increases its commercial nature.

Drawings

FIG. 1 is a schematic structural view of example 1.

Fig. 2 is a side sectional view of embodiment 1.

Fig. 3 is an exploded view of example 1.

Fig. 4 is a schematic view showing the assembly of the contact ring and the connection ring seat in embodiment 1.

Fig. 5 is a schematic structural view of a connection ring seat in embodiment 2.

FIG. 6 is a side sectional view of embodiment 3.

FIG. 7 is a side sectional view of embodiment 4.

The reference numerals in the figures denote the meanings:

1. a contact ring; 11. mounting grooves; 111. a first side wall; 112. a second side wall; 2. a connecting ring seat; 21. caulking grooves; 22. a boss portion; 221. a limiting hole; 23. a limiting platform; 231. a limiting convex part; 3. a spring; 31. limiting the bending section; 32. a merging section; 33. a linkage end; 34. a fixed end; 4. an annular partition plate; 5. and (5) sealing rings.

Detailed Description

The invention will be further described with reference to specific embodiments below:

the mechanical sealing element comprises a movable ring device and a static ring device which are matched with each other to realize mechanical sealing. The mechanical sealing element is generally used in a water pump, the static ring device is mounted on a shell wall at one side of the water pump and is fixedly arranged, and the dynamic ring device is sleeved on a shaft of the motor and moves along with the rotation of the shaft; meanwhile, the movable ring device is abutted against the static ring device for sealing through a spring 3 on the movable ring device.

Example 1:

a dynamic ring assembly for a mechanical seal, comprising:

the contact ring comprises a contact ring 1, wherein the contact ring 1 is provided with a contact surface used for being in contact with a static ring;

the connecting ring seat 2 is linked with the contact ring 1; and

the spring 3 is used for being linked with the connecting ring seat 2, and is provided with a linking end 33 connected with the connecting ring seat 2 and a fixed end 34 fixed on a shaft;

the inner edge of the contact ring 1 is provided with a mounting groove 11, and a sealing ring 5 used for sealing between the shaft and the contact ring 1 is arranged in the mounting groove 11.

The connecting ring seat 2 is provided with an embedded groove 21, and the embedded groove 21 is non-circular; the shape of the contact ring 1 is adapted to the shape of the insertion groove 21. As shown in fig. 1 and 2, in the present embodiment, the connection ring base 2 is made of metal and is formed by connecting an upper ring body and a lower ring body, each ring body has a cross-sectional shape of "l", and a caulking groove 21 is formed in the ring body of the connection ring base 2. The shape of caulking groove 21 is the polygon, and its polygon that forms by a set of straight flange and a set of arc limit crisscross setting in proper order, the shape of contact ring 1 and the shape adaptation of caulking groove 21 the center of contact ring 1 and connecting ring seat 2 all is equipped with the trompil that supplies the axle to pass through. The assembly personnel can directly place the contact ring 1 in the caulking groove 21 of the connecting ring seat 2, and because the shape of the caulking groove 21 and the contact ring 1 is non-circular, the contact ring 1 can rotate together with the connecting ring seat 2 when being installed in the caulking groove 21.

A boss portion 22 is formed on the connecting ring seat 2, as shown in fig. 1 to 3, the boss portion 22 is actually the upper ring body, and the lower end of the spring 3 is fitted to the boss portion 22, so that the spring 3 can be fitted over the boss portion 22 to be interlocked with the connecting ring seat 2. As shown in fig. 2 and 3, a stopper hole 221 is formed at one side of the boss portion 22, and a stopper bent portion 31 bent toward the stopper hole 221 is formed at the coupling end 33 of the spring 3, so that the stopper bent portion 31 is inserted into the stopper hole 221 to couple the spring 3 and the collar 2. As shown in fig. 1-3, the fixed end 34 of the spring 3 is provided with a combining ring part 32 for being sleeved on the shaft, the aperture of the combining ring part 32 is smaller than the outer diameter of the shaft, when the combining ring part 32 is sleeved on the shaft, the combining ring part 32 can be clamped on the shaft due to the return of the spring 3, thereby realizing the connection of the spring 3 and the shaft.

After the spring 3 is connected with the shaft, the connection point of the merging portion 32 and the shaft is determined, so that when the contact ring 1 abuts against the stationary ring device, the spring 3 is in a compressed state, the contact ring 1 abuts against the stationary ring device tightly through the compressed spring 3, the connection ring seat 2 abuts against the contact ring 1 tightly, and meanwhile, the limiting bending section 31 on the spring 3 is limited in the limiting hole 221 of the boss portion 22. At this time, if the shaft rotates, the shaft will drive the spring 3 to rotate, the spring 3 drives the connecting ring seat 2 to rotate, and the connecting ring seat 2 drives the contact ring 1 to rotate. The contact ring 1 is made of ceramic or graphite, and can be contacted and rubbed with the static ring device to maintain the sealing state between the dynamic ring device and the static ring device.

Further, in this embodiment, in order to facilitate the opening of the mounting groove 11, the mounting groove 11 is disposed at one end of the inner edge of the contact ring 1 and faces the connection ring seat 2, and the seal ring 5 is generally made of rubber material and is used for sealing the shaft. As shown in fig. 2 and 3, in this embodiment, the mounting groove 11 is arc-shaped and adapted to the sealing ring, and is integrally located at the upper end of the contact ring 1; the outer diameter of the sealing ring 5 is slightly larger than the size of the mounting groove 11, when the sealing ring 5 is positioned in the mounting groove 11 and a shaft penetrates through the sealing ring 5, the sealing ring 5 is expanded and extruded on the mounting groove 11 and the shaft respectively. Still be equipped with between connecting ring seat 2 and the contact ring 1 and support respectively and lean on connecting ring seat 2 and contact ring 1's annular baffle 4, annular baffle 4 is used for limiting the position sealing washer 5 to carry on down spacingly through mounting groove 11, prevent that sealing washer 5 from being driven by the axle when the axle inserts in the sealing washer 5.

When the movable ring device in the patent is installed, a shaft needs to sequentially penetrate through the contact ring 1, the connecting ring seat 2 and the spring 3, so that the parallel ring part 32 and the sealing ring 5 of the spring 3 are respectively sleeved on two points of the shaft to realize fixation; the shaft may push the sealing ring 5 to move in the process of penetrating, but two sides of the sealing ring 5 are limited by the annular partition plate 4 and the contact ring 1 respectively, so that the sealing ring 5 cannot fall off. It should be noted that after the shaft is installed, because the outer diameter of the sealing ring 5 is slightly larger than the size of the installation groove 11, the sealing ring 5 is arranged between the shaft and the contact ring 1 in an interference fit manner for sealing, and the annular partition plate 4 is not required to be extruded on the sealing ring 5.

When the water pump works, a shaft rotates, if the connection between the sealing ring 5 and the shaft is not tight, a slipping phenomenon can occur between the sealing ring 5 and the shaft or between the sealing ring 5 and the contact ring 1, so that the sealing ring 5 is abraded, and the sealing performance of the sealing ring 5 is influenced; similarly, the shaft and the parallel ring part 32 can also slip, thereby wearing the spring 3 and affecting the service life of the spring 3. When the shaft in this example rotates, the shaft drives the merging portion 32 to move to drive the spring 3 to rotate, the spring 3 drives the connecting ring seat 2 through the boss portion 22 of the connecting ring seat 2, and the connecting ring seat 2 drives the contact ring 1 to link through the caulking groove structure on the connecting ring seat 2, so that the seal ring 5 is linked; on the contrary, because sealing washer 5 suit is epaxial, also can drive sealing washer 5 when the axle rotates and rotate, through the equal linkage's of contact ring 1, connecting ring seat 2 and spring 3 characteristic, make the equal synchronous motion of each part in the whole rotating ring device to reduce the production of wearing and tearing phenomenon, increase the life of whole rotating ring device.

The moving ring device in the embodiment is always immersed in water when in use, and in general, the contact ring 1 is tightly abutted against the stationary ring device without water leakage, and water flow can only enter from a gap between the shaft and the contact ring 1 and pass through the stationary ring to enter a motor of a water pump; therefore, two water leakage conditions exist in the traditional mechanical sealing element, firstly, water flow sequentially penetrates through the spring 3 and the connecting ring seat 2 and finally penetrates through a gap between the shaft and the contact ring 1 to enter the static ring, and secondly, water flow enters from the gap between the contact ring 1 and the connecting ring seat 2 and then penetrates through the gap between the shaft and the contact ring 1 to enter the static ring. In the present embodiment, the sealing rings 5 are disposed on the inner edge of the contact ring 1, and the two water leakage situations are solved by the sealing rings 5 at the same time, compared with the existing structure, the number of the sealing rings 5 provided in the present embodiment is small, the structure is simpler and more stable, and the simplification of the structure also reduces the cost and increases the commerciality thereof.

Moreover, the connecting ring seat 2 in this patent directly supports and leans on contact ring 1 is last, and both shapes are because of caulking groove 21 looks adaptation, compare in traditional structure, and this embodiment has utilized the shared mounting area of original sealing washer for connecting ring seat 2 with contact ring 1's area of contact maximize, thereby make contact ring 1 atress is even, thereby reduces the probability that contact ring 1 damaged, increases its life.

In some embodiments, the merging portion 32 may not be provided, and a clip structure may be directly provided at the upper end of the spring 3 for fixing, but the additional installation of the clip structure may increase the assembly difficulty to some extent, thereby increasing the cost.

Example 2:

most of the structure of this embodiment is the same as that of embodiment 1, except that the connecting ring seat 2 in this embodiment is provided with only one ring body with a cross section in "", and an annular table is further provided at the outer edge of the ring body, the annular table is formed with a limiting platform 23, and the limiting platform 23 is provided with a limiting convex portion 231 for abutting against the end of the spring 3. As shown in fig. 5, the limiting convex part 231 is triangular, and is obtained by bending an annular table, and is used for abutting against the end part of the lower end of the spring 3, when the spring 3 rotates, the end part of the spring 3 can push the annular table at the same time, so that the spring 3 is linked with the connecting ring seat 2; it should be noted that the spring 3 substantially tightly abuts against the connecting ring seat 2 by its own elastic force, and the boss portion 22 of the connecting ring seat 2 on which the spring 3 is fitted is not easily detached, so that there is no need to worry about the problem of stability of the abutting between the spring 3 and the limit protrusion 231.

It should be noted that the linkage structure of the spring 3 and the connection ring base 2 in this patent is not limited to the structure of the embodiment 1 and the embodiment 2, and the manufacturer may also link the spring 3 and the connection ring base 2 by welding or fixing them by a fastening structure, and the function of the movable ring device in this patent can be realized by only linking the spring 3 and the connection ring base 2,

example 3:

most of the structure of the present embodiment is the same as that of example 1, but the difference is that the limiting partition plate is not provided in the present embodiment, and the size of the bottom of the caulking groove 21 is adjusted to limit the upper end of the sealing ring 5 through the connecting ring seat 2 when the contact ring 1 is installed in the connecting ring seat 2.

Example 4:

most of the structure of this embodiment is the same as that of example 1, and the difference is that the limiting partition plate is not provided in this embodiment, the mounting groove 11 is directly provided on the inner side of the contact ring 1, and the mounting groove has a first side wall 111 and a second side wall 112 for limiting the sealing ring 5 up and down, respectively, which can also prevent the sealing ring 5 from falling off in the mounting groove 11, and increase the sealing stability of the sealing ring 5.

Moreover, the sealing performance of the existing mechanical seal is affected by the spring, as disclosed in chinese utility model 2009201460914, if the spring has a reduced elasticity due to long-term use, the moving ring seat pushed by the spring cannot be tightly abutted against the moving ring, thereby possibly increasing the gap between the moving ring seat and the moving ring; because the inner wall and the outer wall of the movable ring seat and the outer wall of the shaft are planes, certain axial movable clearance is provided for the movable ring small sealing ring and the movable ring large sealing ring, and the movable ring small sealing ring and the movable ring large sealing ring move, so that the sealing property of the mechanical sealing element is influenced. And sealing washer 5 in this patent is direct interference fit sets up on the mounting groove 11 in contact ring 1, and sealing washer 5 is direct by spacing about mounting groove 11 is place to can not lead to sealing washer 5 not hard up influence its leakproofness because spring 3 elasticity diminishes.

However, compared to embodiment 1, since the contact ring 1 is made of ceramic or graphite, and the process is complicated if the mounting groove 11 is directly formed on the inner side of the contact ring 1, embodiments 1 and 3 reduce the difficulty of manufacturing the contact ring 1 by disposing the mounting groove 11 on one end of the inner edge of the contact ring 1, thereby increasing the productivity and reducing the cost; meanwhile, the installation groove 11 is formed in one end of the inner edge of the contact ring 1, so that the installation difficulty of the sealing ring 5 can be reduced, and the installation speed is increased.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model should be covered within the protection scope of the utility model.

Claims (10)

1. A dynamic ring assembly for a mechanical seal, for mounting on a shaft, for use in cooperation with a static ring assembly, comprising:

a contact ring (1), the contact ring (1) having a contact surface for contacting the stationary ring arrangement;

a connecting ring seat (2), wherein the connecting ring seat (2) is linked with the contact ring (1); and

a spring (3), the spring (3) is used for linking with the connecting ring seat (2) and is provided with a linking end (33) connected with the connecting ring seat (2) and a fixed end (34) fixed on the shaft;

the inner edge of the contact ring (1) is provided with a mounting groove (11), a sealing ring (5) for sealing a gap between the shaft and the contact ring (1) is arranged in the mounting groove (11), and the sealing ring (5) is in interference fit with the shaft and the contact ring (1) respectively.

2. The moving ring assembly of a mechanical seal according to claim 1, wherein: the connecting ring seat (2) is provided with an embedding groove (21), and the embedding groove (21) is non-circular; the shape of contact ring (1) with the shape looks adaptation of caulking groove (21), work as contact ring (1) is installed when connecting ring seat (2) is interior, connecting ring seat (2) with contact ring (1) linkage.

3. The rotating ring assembly of a mechanical seal according to claim 1, wherein: the mounting groove (11) is arranged on one end of the inner edge of the contact ring (1) and faces the connecting ring seat (2).

4. A dynamic ring assembly of a mechanical seal according to claim 3, wherein: an annular partition plate (4) abutted against the connecting ring seat (2) and the contact ring (1) is further arranged between the connecting ring seat (2) and the contact ring (1), and the annular partition plate (4) is used for limiting the sealing ring (5).

5. The moving ring assembly of a mechanical seal according to claim 1, wherein: the mounting groove (11) is provided with a first side wall (111) and a second side wall (112) which are used for limiting the two sides of the sealing ring (5) respectively.

6. The moving ring assembly of a mechanical seal according to claim 1, wherein: a boss part (22) is arranged on the connecting ring seat (2), and the lower end of the spring (3) is sleeved on the boss part (22) to be linked with the connecting ring seat (2).

7. The rotating ring device of a mechanical seal according to claim 6, wherein: a limiting hole (221) is formed in the boss portion (22), and a limiting bending section (31) used for being placed in the limiting hole (221) is arranged on the linkage end (33) of the spring (3).

8. The rotating ring assembly of a mechanical seal according to claim 6, wherein: the outer edge of the boss part (22) of the connecting ring seat (2) is further provided with a limiting platform (23), and the limiting platform (23) is provided with a limiting convex part (231) which is used for abutting against the end part of the spring (3).

9. The moving ring assembly of a mechanical seal according to claim 1, wherein: and a combining ring part (32) which is sleeved on the shaft is arranged on a fixed end (34) of the spring (3).

10. A mechanical seal comprising a stationary ring arrangement and a moving ring arrangement as claimed in any one of claims 1 to 9.

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