CN211901575U

CN211901575U - Mechanical sealing device suitable for special working conditions

Info

Publication number: CN211901575U
Application number: CN202020324269.6U
Authority: CN
Inventors: 明兴平; 杨宗迪; 吴波; 张霞
Original assignee: Zigong Chuanmi Environmental Protection Technology Co ltd
Current assignee: Zigong Chuanmi Environmental Protection Technology Co ltd
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2020-11-10
Anticipated expiration: 2030-03-16

Abstract

The utility model relates to the technical field of mechanical sealing, in particular to a mechanical sealing device adapting to special working conditions, which comprises a shaft sleeve, wherein an elastic compensation piece and a sealing assembly are sleeved on the shaft sleeve, and an O-shaped sealing ring is sleeved on the shaft sleeve and is arranged between the shaft sleeve and the sealing assembly; the bearing ring is used for pushing the O-shaped sealing ring to abut against the sealing assembly, and is arranged between the elastic compensation piece and the shaft sleeve. The utility model relates to a mechanical seal device who adapts to special operating mode, through set up the load ring between elasticity compensation spare and axle sleeve, elasticity compensation spare promotes seal assembly along the load ring above, avoids O type sealing washer to cause the interference to elasticity compensation spare's flexible to guarantee that seal assembly can in time obtain the elasticity compensation of elasticity compensation spare after wearing and tearing, ensure mechanical seal device's reliability.

Description

Mechanical sealing device suitable for special working conditions

Technical Field

The utility model relates to a mechanical seal technical field, especially a mechanical seal device who adapts to special operating mode.

Background

In chemical reaction equipment, a cartridge type, double-end-face and non-balanced mechanical sealing device is generally used, the working conditions of the chemical reaction equipment during working are complex and changeable, and the mechanical sealing needs to meet the conditions of high temperature resistance, low temperature resistance, high pressure resistance, low pressure resistance, acid resistance, alkali resistance, corrosion resistance and the like.

The existing mechanical sealing device for the medium cavity is generally abutted by two sealing elements to form a sealing surface, so that the medium cavity is sealed, in order to avoid sealing failure caused by abrasion of the two sealing elements in a long-time rotating process along with a transmission shaft, an elastic compensation element is arranged in a matched mode and is abutted to push the two sealing elements to be in an abutting state, however, in use, the sealing device is found to be provided with an O-shaped sealing ring which is different from the sealing element material between the sealing element and a shaft sleeve on one side close to the elastic compensation element in order to guarantee the sealing effect.

However, when the medium cavity is complicated, varied, vibrated and high-pressure, the pressure in the medium cavity pushes the sealing element to move towards one side of the elastic compensation element to drive the O-shaped sealing ring to correspondingly shift, and when the sealing element is worn, the friction force between the O-shaped sealing ring and the shaft sleeve is relatively large, so that the sealing element is often blocked between the elastic compensation element and the sealing element, the sealing compensation of the sealing element by the elastic compensation element is affected, and the sealing effect of the mechanical sealing device is affected.

In summary, there is a need for a technical solution to solve the technical problem that the arrangement of an O-ring affects the normal operation of an elastic compensation mechanism in the existing mechanical sealing device under a high-pressure working condition.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: aiming at the technical problem that the arrangement of an O-shaped sealing ring can influence the normal work of an elastic compensation mechanism when a mechanical sealing device is under a high-pressure working condition in the prior art, the mechanical sealing device suitable for special working conditions is provided.

In order to realize the purpose, the utility model discloses a technical scheme be:

a mechanical sealing device adapting to special working conditions comprises a shaft sleeve, wherein an elastic compensation piece and a sealing component are sleeved on the shaft sleeve,

the shaft sleeve is also sleeved with an O-shaped sealing ring, and the O-shaped sealing ring is arranged between the shaft sleeve and the sealing assembly;

the bearing ring is used for pushing the O-shaped sealing ring to abut against the sealing assembly, and is arranged between the elastic compensation piece and the shaft sleeve.

The utility model relates to a mechanical seal device who adapts to special operating mode, through set up the load ring between elastic compensation spare and axle sleeve, on the one hand, come from medium intracavity pressure promotion sealing assembly and support when pushing away O type sealing washer, O type sealing washer will receive the reaction force that comes from the load ring, avoid O type sealing washer position excursion on a large scale to appear, on the other hand, appear wearing and tearing back at sealing assembly, elastic compensation spare promotes sealing assembly along load ring upper surface, avoid O type sealing washer to cause the interference to elastic compensation spare's flexible, thereby guarantee that sealing assembly can in time obtain elastic compensation spare's elastic compensation after wearing and tearing, ensure mechanical seal device's reliability.

As the preferred scheme of the utility model, the elasticity compensation piece includes spring and push ring, the spring passes through the push ring with the seal assembly butt, the push ring sets up on the load ring.

As the utility model discloses a preferred scheme, the spring includes a plurality of, a plurality of the spring is followed the circumference of axle sleeve is evenly arranged. A plurality of springs are evenly arranged on the circumferential direction of the shaft sleeve, and the springs push the push ring at the same time, so that the compensation of the spring opposite movement sealing ring is more stable, the elasticity is stronger, and the reliability of mechanical sealing is ensured.

As the utility model discloses a preferred scheme still includes the spring holder, the spring housing cover is established on the axle sleeve, spring one end is connected the spring holder, the other end is connected push away the ring.

As the utility model discloses a preferred scheme, be equipped with on the spring holder a plurality of be used for with the threaded hole of axle sleeve connection, every threaded hole has set fastening screw more than two, more than two fastening screw is range upon range of to be arranged. The spring holder is fixed through the fastening screw of range upon range of arrangement, and the fastening screw that is located the below is used for connecting spring holder and axle sleeve, and the fastening screw top that is located the top is tight in the upper end of fastening screw below, and two fastening screws have played and have tightly acted on, avoid appearing not hard up phenomenon under the operating mode of high pressure, vibration.

As the utility model discloses a preferred scheme, it is a plurality of the screw hole is followed spring holder circumference is evenly arranged. The installation of the spring seat is more stable, and the elastic force stability of the elastic compensation part is ensured, so that the sealing reliability of the movable sealing ring and the static sealing ring is ensured.

As the utility model discloses a preferred scheme, seal assembly includes the dynamic seal ring and the quiet sealing ring of connecting along axle sleeve axis direction butt, the O type sealing washer sets up the axle sleeve with move between the sealing ring.

As the utility model discloses an optimal scheme, move the sealing ring with axle sleeve complex one side be equipped with the spacing recess of O type sealing washer adaptation, spacing recess is close to one side of load ring is equipped with the opening.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

the utility model relates to a mechanical seal device who adapts to special operating mode, through set up the load ring between elasticity compensation spare and axle sleeve, elasticity compensation spare promotes seal assembly along the load ring above, avoids O type sealing washer to cause the interference to elasticity compensation spare's flexible to guarantee that seal assembly can in time obtain the elasticity compensation of elasticity compensation spare after wearing and tearing, ensure mechanical seal device's reliability.

Drawings

Fig. 1 is a schematic view of a mechanical sealing device adapted to a special working condition of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is an enlarged view at B in FIG. 2;

FIG. 4 is an enlarged view of the spring seat of FIG. 2;

the labels in the figure are: 1-shaft sleeve, 2-elastic compensation part, 21-spring, 22-push ring, 3-sealing component, 31-dynamic sealing ring, 311-limit groove, 32-static sealing ring, 4-O-shaped sealing ring, 5-bearing ring, 6-spring seat, 61-threaded hole and 7-fastening screw.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1

As shown in figures 1-4, the mechanical sealing device adapted to special working conditions of the present invention comprises a shaft sleeve 1 and a sealing seat 8, wherein an elastic compensation member 2 and a sealing assembly 3 are sleeved on the shaft sleeve 1,

the shaft sleeve 1 is further sleeved with an O-shaped sealing ring 4, and the O-shaped sealing ring 4 is arranged between the shaft sleeve 1 and the sealing assembly 3;

the bearing ring 5 is further sleeved on the shaft sleeve 1, the bearing ring 5 is used for pushing the O-shaped sealing ring 4 to be abutted against the sealing assembly 3, and the bearing ring 5 is arranged between the elastic compensation piece 2 and the shaft sleeve 1.

Specifically, the elastic compensation piece 2 comprises a spring 21 and a push ring 22, the spring 21 is abutted to the sealing assembly 3 through the push ring 22, the push ring 22 is arranged on the bearing ring 5, the push ring 22 is arranged at the end part of the spring 21, the spring 21 is abutted to the push ring 22 and the sealing assembly 3, and therefore the elastic compensation piece 2 is abutted to the sealing assembly 3 more stably, the movement is more stable, and the sealing compensation effect is better.

Further, the springs 21 include a plurality of springs 21, the plurality of springs 21 are uniformly arranged along the circumferential direction of the shaft sleeve 1, the plurality of springs 21 are uniformly arranged in the circumferential direction of the shaft sleeve 1, and the plurality of springs 21 simultaneously push the push ring 22, so that the compensation of the spring 21 to the sealing ring 31 is more stable, the elastic force is stronger, and the reliability of mechanical sealing is ensured.

Specifically, still include spring holder 6, spring holder 6 cover is established on the axle sleeve 1, spring 21 one end is connected spring holder 6, and the other end is connected push ring 22, wherein be fixed connection between spring holder 6 and the axle sleeve 1, be fixed connection between spring 21 and the spring holder 6.

Further, be equipped with on the spring holder 6 a plurality of be used for with the screw hole 61 that axle sleeve 1 is connected, every set two above fastening screw 7 in the screw hole 61, more than two fastening screw 7 is range upon range of to be arranged, and spring holder 6 is fixed through the fastening screw 7 of range upon range of arrangement, and the fastening screw 7 that is located the below is used for connecting spring holder 6 and axle sleeve 1, and the fastening screw 7 top that is located the top is tight in the upper end of fastening screw 7 in the below, and two fastening screw 7 have played and have tightly acted on, avoid appearing not hard up phenomenon under the operating mode of high pressure, vibration.

Furthermore, the plurality of threaded holes 61 are uniformly arranged along the circumferential direction of the spring seat 6, so that the spring seat 6 is more stably mounted, the elastic force of the elastic compensation part 2 is ensured to be stable, and the sealing reliability of the movable sealing ring 31 and the static sealing ring 32 is ensured.

Specifically, seal assembly 3 is including moving sealing ring 31 and quiet sealing ring 32, move sealing ring 31 with quiet sealing ring 32 is connected along axle sleeve 1's axis direction butt, it establishes to move sealing ring 31 the axle sleeve 1 is last, quiet sealing ring 32 sets up on the seal receptacle 8, O type sealing washer 4 sets up axle sleeve 1 with between the dynamic sealing ring 31, dynamic sealing ring 31 rotates along with axle sleeve 1, quiet sealing ring 32 along with seal receptacle 8 together with equipment fixed connection, dynamic sealing ring 31 forms sealedly to the equipment inner chamber with quiet sealing ring 32 butt.

Further, the movable sealing ring 31 and one side of the shaft sleeve 1 are provided with a limiting groove 311 matched with the O-shaped sealing ring 4, the limiting groove 311 is close to one side of the bearing ring 5 and is provided with an opening, the opening is matched with the bearing ring 5, so that the bearing ring 5 can enter the limiting groove 311 and is pushed against the O-shaped sealing ring 4, the O-shaped sealing ring 4 and the elastic compensation 2 do not move dry and astringent, the normal work of the elastic compensation part 2 under a special working condition is realized, and the reliability of the sealing performance is ensured.

The utility model relates to a mechanical seal device of adaptation special operating mode, through set up load ring 5 between elastic compensation spare 2 and axle sleeve 1, on the one hand, come from medium intracavity pressure promotion seal assembly 3 and support when pushing away O type sealing washer 4, O type sealing washer 4 will receive the reaction force that comes from load ring 5, avoid O type sealing washer 4 the skew on a large scale of position to appear, on the other hand, after wearing and tearing appear in seal assembly 3, elastic compensation spare 2 promotes seal assembly 3 along load ring 5 upper surface, avoid O type sealing washer 4 to cause the interference to elastic compensation spare 2's flexible, thereby guarantee that seal assembly 3 can in time obtain elastic compensation spare 2 after wearing and tearing, ensure mechanical seal device's reliability.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A mechanical sealing device adapting to special working conditions comprises a shaft sleeve (1), wherein an elastic compensation piece (2) and a sealing assembly (3) are sleeved on the shaft sleeve (1),

the shaft sleeve (1) is further sleeved with an O-shaped sealing ring (4), and the O-shaped sealing ring (4) is arranged between the shaft sleeve (1) and the sealing assembly (3);

the sealing device is characterized in that the shaft sleeve (1) is further sleeved with a bearing ring (5), the bearing ring (5) is used for abutting against the O-shaped sealing ring (4) and the sealing assembly (3), and the bearing ring (5) is arranged between the elastic compensation piece (2) and the shaft sleeve (1).

2. Mechanical sealing device adapted to special working conditions, according to claim 1, characterized in that said elastic compensator (2) comprises a spring (21) and a push ring (22), said spring (21) is abutted to said sealing assembly (3) through said push ring (22), said push ring (22) is arranged on said bearing ring (5).

3. Mechanical sealing device adapting to special working conditions, according to claim 2, characterized in that said spring (21) comprises several springs (21), and several springs (21) are uniformly arranged along the circumference of said shaft sleeve (1).

4. The mechanical sealing device adapting to the special working condition as claimed in claim 2, further comprising a spring seat (6), wherein the spring seat (6) is sleeved on the shaft sleeve (1), one end of the spring (21) is connected with the spring seat (6), and the other end of the spring is connected with the push ring (22).

5. A mechanical sealing device adapting to special working conditions according to claim 4, characterized in that a plurality of threaded holes (61) for connecting with the shaft sleeve (1) are arranged on the spring seat (6), more than two fastening screws (7) are arranged in each threaded hole (61), and more than two fastening screws (7) are arranged in a stacked manner.

6. Mechanical sealing device adapting to special working conditions, according to claim 5, characterized in that a plurality of threaded holes (61) are uniformly arranged along the circumference of the spring seat (6).

7. A mechanical sealing device adapted to special working conditions according to any one of claims 1-6, characterized in that the sealing assembly (3) comprises a movable sealing ring (31) and a static sealing ring (32) which are connected in an abutting mode along the axial direction of the shaft sleeve (1), and the O-shaped sealing ring (4) is arranged between the shaft sleeve (1) and the movable sealing ring (31).

8. The mechanical sealing device adapting to the special working condition as claimed in claim 7, wherein a limiting groove (311) adapted to the O-shaped sealing ring (4) is arranged on one side of the movable sealing ring (31) matched with the shaft sleeve (1), and an opening is arranged on one side of the limiting groove (311) close to the bearing ring (5).