Mechanical sealing structure with stretching shaft sleeve
By introducing a tensile sleeve into the mechanical seal structure, the driving static ring and the moving ring are maintained in place, solving the leakage problem caused by spring failure of traditional mechanical seals, achieving better sealing effect and lower installation space requirements.
Patent Information
- Application Number
- CN202422048676.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-22
AI Technical Summary
After a long period of use, traditional mechanical seals may cause leakage between the rotating member and the stationary cavity due to spring failure.
A mechanical seal structure with a tensile sleeve is adopted, and the static ring and the moving ring are driven by the tensile sleeve to ensure that the static ring and the moving ring are always fitted, thereby avoiding leakage.
It effectively avoids leakage caused by spring failure, ensures sealing effect, and reduces the installation space requirements between the cavity and the static ring.
Smart Images
Figure CN222910767U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical seal structures, and particularly refers to a mechanical seal structure with a stretching shaft sleeve. Background Art
[0002] Traditional mechanical seals are widely used in equipment such as pumps, compressors, and stirring machinery to cut off the leakage path between rotating components and stationary cavities. Spring mechanical seals are one of the most common types. However, after long-term use, the spring may gradually fail due to medium erosion, which may lead to leakage between the rotating component and the stationary cavity. Summary of the Invention
[0003] The utility model is made in consideration of the foregoing problems. The purpose of the utility model is to provide a mechanical seal structure with a stretching shaft sleeve, which can drive the static ring and the dynamic ring to abut against each other by using the stretching shaft sleeve, and can avoid leakage caused by spring failure.
[0004] To achieve the above purpose, the utility model provides a mechanical seal structure with a stretching shaft sleeve for sealing the gap between a shaft body and a cavity. The mechanical seal structure includes a dynamic ring, a static ring, a transmission seat, and a stretching shaft sleeve. The dynamic ring is sleeved outside the shaft body. The transmission seat is fixed on the shaft body and is connected to the dynamic ring to drive the dynamic ring to rotate with the shaft body. The static ring is radially movably arranged on the inner wall of the cavity, and the static ring can be attached to the dynamic ring to seal the gap between the shaft body and the cavity.
[0005] The stretching shaft sleeve is fixed on the transmission seat, and the stretching shaft sleeve is connected to the static ring and can drive the static ring to keep in contact with the dynamic ring.
[0006] For the mechanical seal structure with a stretching shaft sleeve as described above, the stretching shaft sleeve is fixed on the transmission seat through an adjusting bolt, and the adjusting bolt is used to adjust the tightness of the stretching shaft sleeve.
[0007] For the mechanical seal structure with a stretching shaft sleeve as described above, it further includes a leather cup. The static ring is embedded inside the leather cup, and the leather cup is sleeved inside the stretching shaft sleeve.
[0008] For the mechanical seal structure with a stretching shaft sleeve as described above, it further includes a dynamic ring seat. The dynamic ring is fixed on the dynamic ring seat through a sealing ring, and the dynamic ring seat is connected to the transmission seat.
[0009] The utility model has the following beneficial effects: Compared with the prior art, the application uses the pulling force of the stretching shaft sleeve to press the static ring against the dynamic ring, which can make the static ring keep in contact with the dynamic ring, ensure the sealing effect, and the stretching shaft sleeve is not easily distorted or deformed. At the same time, the installation space requirement between the cavity and the static ring can be reduced. Description of the Drawings
[0010] Figure 1 It is a sectional view of the overall structure of the embodiment.
[0011] In the figure:
[0012] 1. Moving ring; 2. Stationary ring; 3. Transmission seat; 4. Tensile bushing; 5. Adjusting screw; 6. Leather cup; 7. Moving ring seat; 8. Sealing ring. Detailed Implementation Manner
[0013] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.
[0014] As Figure 1 shown, a mechanical seal structure with a tensile bushing includes a moving ring 1, a stationary ring 2, a transmission seat 3, a tensile bushing 4, an adjusting bolt, a leather cup 6 and a moving ring seat 7, and is used to seal the gap between the shaft body and the cavity.
[0015] Among them, the moving ring 1 is sleeved on the outside of the shaft body, the transmission seat 3 is fixed on the shaft body, and is connected to the moving ring 1 through the moving ring seat 7 to drive the moving ring 1 to rotate with the shaft body. The stationary ring 2 is arranged on the inner wall of the cavity so as to be radially movable, that is, the stationary ring 2 can be in contact with the moving ring 1 to seal the gap between the shaft sleeve and the cavity. The tensile bushing 4 is fixed on the transmission seat 3, and the tensile bushing 4 is connected to the stationary ring 2, applying a tensile force on the stationary ring 2, so that the stationary ring 2 and the moving ring 1 always keep in contact and rotate, ensuring the sealing performance, and the tensile bushing 4 is not easily damaged, effectively avoiding leakage.
[0016] In this embodiment, the tensile bushing 4 is made of an elastic material, and its elastic force is used as the tensile force.
[0017] Specifically, the tensile bushing 4 is fixed on the transmission seat 3 through an adjusting bolt, and the adjusting bolt is used to adjust the tightness of the tensile bushing 4. By adjusting the tightness, it can be applicable to stationary rings 2 and moving rings 1 of different sizes, improving the applicability.
[0018] Among them, the stationary ring 2 is embedded inside the leather cup 6 to form a static group, and the leather cup 6 is sleeved inside the tensile bushing 4. Then, the connection between the tensile bushing 4 and the stationary ring 2 is realized through the leather cup 6 to drive it to move toward the side close to the moving ring 1. When the installation space is too small, the tensile bushing 4 can also be placed outside, and it can also be in contact with the outside of the leather cup 6.
[0019] In order to achieve the sealing of each component, the moving ring 1 is fixed on the moving ring seat 7 through a sealing ring 8, and the moving ring seat 7 is connected to the transmission seat 3. When the transmission seat 3 rotates with the shaft body, the transmission seat 3 drives the moving ring 1 to rotate together through the moving ring seat 7.
[0020] The technical solution of the present utility model has been elaborated in detail in combination with the accompanying drawings. The described embodiments are used to help understand the idea of the present utility model. The specific embodiments described herein are only examples of the spirit of the present utility model. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.
[0021] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.
[0022] In addition, in the present utility model, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0023] In the present utility model, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0024] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
Claims
1. A mechanical seal structure with a stretch sleeve, used to seal the gap between the shaft body and the cavity, characterized in that: The mechanical seal structure comprises a dynamic ring, a static ring, a transmission seat and a stretching sleeve, wherein the dynamic ring is sleeved on the outer side of the shaft body, the transmission seat is fixed on the shaft body and connected with the dynamic ring to drive the dynamic ring to rotate with the shaft body, the static ring is radially movably arranged on the inner wall of the cavity, and the static ring can fit with the dynamic ring to seal the gap between the shaft body and the cavity; The stretching sleeve is fixed on the transmission seat and is connected to the stationary ring, so as to drive the stationary ring to keep in contact with the dynamic ring.
2. A mechanical seal structure with a stretch sleeve according to claim 1, characterized in that: The stretching sleeve is fixed on the transmission seat by an adjusting bolt, and the adjusting bolt is used to adjust the tightness of the stretching sleeve.
3. A mechanical seal structure with a stretch sleeve according to claim 1 or 2, characterized in that: It also includes a leather cup, the static ring is embedded in the inner side of the leather cup, and the leather cup is sleeved in the stretching sleeve.
4. A mechanical seal structure with a stretch sleeve according to claim 1, characterized in that: It also includes a dynamic ring seat, the dynamic ring is fixed on the dynamic ring seat through a sealing ring, and the dynamic ring seat is connected to the transmission seat.