CN218236137U - Rubber bellows mechanical seal - Google Patents
Rubber bellows mechanical seal Download PDFInfo
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- CN218236137U CN218236137U CN202222209602.0U CN202222209602U CN218236137U CN 218236137 U CN218236137 U CN 218236137U CN 202222209602 U CN202222209602 U CN 202222209602U CN 218236137 U CN218236137 U CN 218236137U
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Abstract
The utility model discloses a rubber bellows mechanical seal, which comprises a first spring retainer (1), a rubber bellows (2), a spring (3), a second spring retainer (4), a sealing movable ring (5), a sealing static ring (6) and an auxiliary sealing ring (7); the end face of one end of the static sealing ring (6) is abutted against the end face of one end of the dynamic sealing ring (5) for sealing, and the auxiliary sealing ring (7) is fixed at the other end of the static sealing ring (6); be equipped with centering guide ring (8) in location step (2.1), centering guide ring (8) cover is equipped with the clearance between the off-axis and the two, centering guide ring (8) with to location step (2.1) axial and radial positioning. The mechanical seal increases the radial positioning of the rubber corrugated pipe, can solve the problems of deflection and compensation of the mechanical seal in the process of the asymmetry of the mechanical seal spring structure and the continuous change of the fluid condition, improves the sealing effect of the mechanical seal, and ensures the stable operation of the mechanical seal.
Description
Technical Field
The invention relates to the technical field of sealing elements, in particular to a rubber corrugated pipe mechanical seal.
Background
The traditional rubber bellows mechanical seal has simple structure and low price, and can adapt to certain granular media, so that the traditional rubber bellows mechanical seal is widely applied to fluid conveying equipment such as water pumps, sewage pumps, submersible pumps, pipeline pumps, beverage pumps, urban water supply and drainage pumps and the like.
Due to the structural characteristics of springs and other parts on the rubber bellows mechanical seal, complete symmetry of the structure is difficult to achieve in the design and production processes, dynamic balance of the mechanical seal is difficult to achieve in the operation process, the mechanical seal cannot stably operate along an axis line in the operation process, and certain deflection is generated, the deflection often affects the sealing effect of the mechanical seal, meanwhile, the fluid state in the operation process of equipment constantly changes, the deflection condition constantly changes in the operation process of the mechanical seal, the compensation capacity is reduced, the operation condition of the mechanical seal is unstable, and the sealing effect and stable operation of the mechanical seal are seriously affected.
Disclosure of Invention
The invention aims to solve the technical problems of increasing the radial positioning of the rubber corrugated pipe, solving the problems of deflection and compensation of the mechanical seal in the process of asymmetric spring structure and continuous change of fluid conditions of the mechanical seal, improving the sealing effect of the mechanical seal and ensuring the stable operation of the mechanical seal.
The invention adopts the technical scheme that the rubber corrugated pipe mechanical seal with the following structure is provided, and comprises a first spring retainer, a rubber corrugated pipe, a spring, a second spring retainer, a sealing movable ring, a sealing static ring and an auxiliary sealing ring; the sealing device comprises a sealing static ring, a spring, a first spring retainer, a second spring retainer, a sealing movable ring and an auxiliary sealing ring, wherein the spring is sleeved on the outer wall of the rubber corrugated pipe, one end of the spring is installed at one end of the rubber corrugated pipe through the first spring retainer, the other end of the spring is installed at the other end of the rubber corrugated pipe through the second spring retainer, the sealing movable ring is fixed at one end of the rubber corrugated pipe, one end face of the sealing static ring is abutted against one end face of the sealing movable ring for sealing, and the auxiliary sealing ring is fixed at the other end of the sealing static ring; the method is characterized in that: the inner wall of the rubber corrugated pipe is provided with a positioning step, a centering guide ring is arranged in the positioning step, the centering guide ring is sleeved outside the shaft, a movable gap is arranged between the centering guide ring and the positioning step, and the centering guide ring is used for axially and radially positioning the positioning step.
The centering guide ring comprises a guide ring body and a convex ring, the guide ring body is tightly matched on the inner wall of the rubber corrugated pipe, and the convex ring is fixed on the end face of the positioning step; and the end face of one end of the convex ring is abutted against the end face of the positioning step.
One end of the sealing movable ring is abutted against the end face of the other end of the convex ring.
The convex ring is positioned at the bottom of one end of the guide ring body.
The cross section of the centering guide ring is one of L shape, square shape and T shape.
The centering guide ring is a body made of a non-metal self-lubricating material.
After adopting the structure, the invention has the following advantages: on the basis of the traditional rubber corrugated pipe mechanical seal, a centering guide ring is additionally arranged at the connecting part of a movable ring and a corrugated pipe, a small gap is reserved between the centering guide ring and a shaft, and when the mechanical seal deflects due to the structure and the change of the fluid state, the centering guide ring can play a good centering role, so that the deflection of the mechanical seal is within an acceptable range of stable operation of the mechanical seal, and the sealing effect of the mechanical seal is ensured.
As an improvement, the centering guide ring comprises a guide ring body and a convex ring, the guide ring body is tightly matched on the inner wall of the rubber corrugated pipe, and the convex ring is fixed on the end face of the positioning step; and the end face of one end of the convex ring is abutted against the end face of the positioning step.
As an improvement, one end of the sealing movable ring is abutted against the end face of the other end of the convex ring. The positioning structure is simple, and the centering guide ring can be axially and radially positioned relative to the positioning step.
As an improvement, the centering guide ring is a body made of a non-metal self-lubricating material. Make this centering guide ring have good self-lubricating effect, can take place under the condition of axial float at equipment, ensure that the rotating ring freely slides along the axle to guarantee that mechanical seal's sound ring can well laminate, thereby play good sealed effect!
Drawings
Fig. 1 is a schematic cross-sectional view of a rubber bellows mechanical seal of the present invention.
Fig. 2 is an enlarged schematic view of a portion a of fig. 1.
Fig. 3 is a schematic view of a centering guide ring.
Shown in the figure:
1. the sealing device comprises a first spring retainer, 2, a rubber corrugated pipe, 2.1, a positioning step, 3, a spring, 4, a second spring retainer, 5, a sealing movable ring, 6, a sealing static ring, 7, an auxiliary sealing ring, 8, a centering guide ring, 8.1, a guide ring body, 8.2 and a convex ring.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1-3, the mechanical seal for rubber bellows of the present invention comprises a first spring retainer 1, a rubber bellows 2, a spring 3, a second spring retainer 4, a movable sealing ring 5, a stationary sealing ring 6, and an auxiliary sealing ring 7;
as shown in fig. 1, the spring 3 is sleeved on the outer wall of the rubber corrugated pipe 2, the left end of the spring is installed at one end of the rubber corrugated pipe 2 through the first spring retainer 1, and the right end of the spring is installed at the other end of the rubber corrugated pipe 2 through the second spring retainer 4. Bosses are arranged at two ends of the rubber corrugated pipe 2, and the first spring retainer 1 and the second spring retainer 4 are respectively positioned on the bosses at the two ends. The sealing movable ring 5 is fixed at the right end of the rubber corrugated pipe 2, the left end face of the sealing static ring 6 abuts against the right end face of the sealing movable ring 5 for sealing, the spring 3 pushes the right end face of the sealing movable ring 5 to always abut against the left end face of the sealing static ring 6, and the auxiliary sealing ring 7 is fixed at the right end of the sealing static ring 6.
The inner wall of rubber bellows 2 is equipped with location step 2.1, be equipped with centering guide ring 8 in location step 2.1, centering guide ring 8 cover is equipped with the clearance between the off-axis and the two, centering guide ring 8 with to location step 2.1 axial and radial positioning. When deflection occurs, the centering guide ring 8 can play a good centering role, so that the deflection of the mechanical seal occurs in an acceptable range, and the sealing effect of the mechanical seal is ensured.
As shown in fig. 2, the centering guide ring 8 includes a guide ring body 8.1 and a convex ring 8.2, the guide ring body 8.1 is tightly fitted on the inner wall of the rubber corrugated pipe 2, and the convex ring 8.2 is fixed on the end face of the positioning step 2.1; and the end surface of one end of the convex ring 8.2 is abutted against the end surface of the positioning step 2.1.
One end of the sealing movable ring 5 is abutted against the end face of the other end of the convex ring 8.2.
The convex ring 8.2 is positioned at the bottom of one end of the guide ring body 8.1.
The cross section of the centering guide ring 8 is one of L shape, square shape and T shape.
The centering guide ring 8 is a body made of a non-metal self-lubricating material. Because this centering guide ring has good self-lubricating effect, can ensure that the rotating ring freely slides along the axle under the condition that equipment takes place the axial float to guarantee that mechanical seal's sound ring can well laminate, thereby play good sealed effect.
Claims (6)
1. A rubber corrugated pipe mechanical seal comprises a first spring retainer (1), a rubber corrugated pipe (2), a spring (3), a second spring retainer (4), a movable sealing ring (5), a static sealing ring (6) and an auxiliary sealing ring (7); the sealing device is characterized in that the spring (3) is sleeved on the outer wall of the rubber corrugated pipe (2), one end of the spring is installed at one end of the rubber corrugated pipe (2) through the first spring retainer (1), the other end of the spring is installed at the other end of the rubber corrugated pipe (2) through the second spring retainer (4), the movable sealing ring (5) is fixed at one end of the rubber corrugated pipe (2), one end face of the static sealing ring (6) is abutted to one end face of the movable sealing ring (5) for sealing, and the auxiliary sealing ring (7) is fixed at the other end of the static sealing ring (6); the method is characterized in that: the inner wall of rubber bellows (2) is equipped with location step (2.1), be equipped with centering guide ring (8) in location step (2.1), centering guide ring (8) cover is equipped with the clearance between the off-axis and the two, centering guide ring (8) with to location step (2.1) axial and radial positioning.
2. A rubber bellows mechanical seal according to claim 1, characterized in that the centering guide ring (8) comprises a guide ring body (8.1) and a convex ring (8.2), the guide ring body (8.1) is tightly fitted on the inner wall of the rubber bellows (2), and the convex ring (8.2) is fixed on the end face of the positioning step (2.1); one end face of the convex ring (8.2) is abutted against the end face of the positioning step (2.1).
3. A rubber bellows mechanical seal according to claim 2, wherein: one end of the sealing movable ring (5) is propped against the end face of the other end of the convex ring (8.2).
4. A rubber bellows mechanical seal according to claim 2, wherein: the convex ring (8.2) is positioned at the bottom of one end of the guide ring body (8.1).
5. A rubber bellows mechanical seal according to claim 1, characterized in that the centering guide ring (8) has one of an L-shape, a square shape and a T-shape in cross section.
6. A rubber bellows mechanical seal according to claim 1, characterized in that said centering guide ring (8) is a body made of non-metallic self-lubricating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222209602.0U CN218236137U (en) | 2022-08-23 | 2022-08-23 | Rubber bellows mechanical seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222209602.0U CN218236137U (en) | 2022-08-23 | 2022-08-23 | Rubber bellows mechanical seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218236137U true CN218236137U (en) | 2023-01-06 |
Family
ID=84683088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222209602.0U Active CN218236137U (en) | 2022-08-23 | 2022-08-23 | Rubber bellows mechanical seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218236137U (en) |
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2022
- 2022-08-23 CN CN202222209602.0U patent/CN218236137U/en active Active
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