Improved sealing assembly
By using a synergistic sealing mechanism of a reverse-rotating PTFE combination ring and a rotary seal, the problem of easy leakage of traditional rotary seals under high pressure or high speed is solved, achieving efficient sealing under different working conditions and improving sealing reliability and pressure resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2026-03-24
Smart Images
Figure CN224033082U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic transmission machinery technology, and in particular to an improved sealing component. Background Technology
[0002] In the field of hydraulic transmission machinery and rotating equipment, rotary seals are widely used as key components to prevent leakage of pressurized media and the intrusion of external contaminants. While traditional rotary seals (such as lip seals and mechanical seals) can meet basic sealing requirements under normal operating conditions, they have significant shortcomings in practical applications. When equipment experiences a sudden increase in internal pressure due to a localized fault or when the rotating shaft operates at high speed, traditional sealing structures often leak due to insufficient pressure resistance (typically below 20 MPa).
[0003] Existing technologies often employ single-seal designs that struggle to meet the sealing requirements of various operating conditions. At low speeds, excessive frictional resistance can accelerate wear of the seals; conversely, under high pressure or high speeds, there is a lack of effective auxiliary sealing mechanisms to mitigate pressure impacts. While some improvements attempt to enhance performance through composite seals or material optimization, most suffer from structural complexity, installation difficulties, or high costs. Utility Model Content
[0004] This invention provides a compact, high-pressure resistant, and adaptable sealing assembly for various working conditions. By innovatively introducing a synergistic sealing mechanism of a reverse-rotating PTFE combination ring and a rotary seal, it effectively overcomes the shortcomings of existing technologies and achieves dual dynamic sealing under low-speed, high-speed, and high-pressure conditions, significantly improving sealing reliability and service life.
[0005] The technical solution adopted by this utility model is as follows: an improved sealing component, including a mounting base, a rotary seal on the inner side of the mounting base, a connecting plate on the outer side of the rotary seal and the connecting plate being tightly fitted and fixed in the hole of the mounting base, a reverse rotating PTFE combination ring on the inner side of the connecting plate, the reverse rotating PTFE combination ring being composed of an O-ring and a Glyd ring, the lip of the rotary seal and the Glyd ring being in contact with the outer surface of the rotating shaft, the reverse rotating PTFE combination ring providing a double seal in conjunction with the rotary seal when the rotating shaft rotates at high speed and the internal pressure of the sealing component increases.
[0006] As a further improvement of this utility model, the O-ring of the reverse rotating PTFE combination ring is installed at the bottom of the mounting groove inside the connecting plate, and the Glyd ring is attached to the inside of the O-ring.
[0007] As a further improvement of this utility model, the connecting plate and the mounting base are fixed by interference fit, and the mounting position of the PTFE combination ring rotated in the opposite direction forms an axially misaligned layout with the lip of the rotary seal.
[0008] The beneficial effects of this invention are as follows: When the rotating shaft moves at low speed, the rotary seal provides a sealing function; when the rotating shaft moves at high speed or when high pressure occurs in the inner cavity, the reverse-rotating PTFE combination ring takes effect, which not only withstands high pressure but also provides a seal, preventing oil leakage and protecting the rotary seal from damage; through these two combinations, this invention not only greatly improves the sealing performance, but the reverse-rotating PTFE combination ring can also withstand high pressure of 40MPa, thus improving the quality of the product. Attached Figure Description
[0009] Figure 1 This is an overall cross-sectional view of an improved sealing component according to this utility model;
[0010] Figure 2 This is a schematic diagram of the installation of a reverse-rotating PTFE combination ring for an improved sealing component according to this utility model.
[0011] As shown in the figure: 1. Mounting base; 2. Rotary seal; 3. Connecting plate; 4. Reverse rotating PTFE combination ring; 5. O-ring; 6. Glyd ring; 7. Rotating shaft. Detailed Implementation
[0012] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to their structure and are relative concepts. Therefore, they may vary depending on their location and usage; thus, these or other directional terms should not be interpreted as restrictive terms.
[0013] The singular forms “a,” “the,” and “the” used in this specification are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes one or more of the associated listed items, any or all possible combinations thereof.
[0014] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0015] This utility model provides the following: Figure 1 and Figure 2An improved sealing assembly is shown, including a mounting base 1, a rotary seal 2 on the inner side of the mounting base 1, a connecting plate 3 on the outer side of the rotary seal 2, and the connecting plate 3 being tightly fitted and fixed in the hole of the mounting base 1. A reverse rotating PTFE combination ring 4 is provided on the inner side of the connecting plate 3. The reverse rotating PTFE combination ring 4 is composed of an O-ring 5 and a Glyd ring 6. The lip of the rotary seal 2 and the Glyd ring 6 are attached to the outer surface of the rotating shaft 7. The reverse rotating PTFE combination ring 4 provides a double seal in conjunction with the rotary seal 2 when the rotating shaft 7 rotates at high speed and the internal pressure of the sealing assembly increases.
[0016] like Figure 1 and Figure 2 As shown, in this utility model, the O-ring 5 of the reverse rotating PTFE combination ring 4 is installed at the bottom of the mounting groove inside the connecting plate 3, and the Glyd ring 6 is fitted inside the O-ring 5. Through the tight fit between the Glyd ring 6 and the O-ring 5, the overall stability and sealing performance of the reverse rotating PTFE combination ring 4 are enhanced.
[0017] like Figure 1 and Figure 2 As shown, in this utility model, the connecting plate 3 and the mounting base 1 are fixed by an interference fit, and the mounting position of the PTFE combination ring 4 rotates in the opposite direction to form an axially misaligned layout with the lip of the rotary seal 2. This optimizes the internal structure of the sealing assembly, avoids direct interference between the seals, and further improves the stability and reliability of the seal.
[0018] Working Principle: In practical implementation, during assembly, the rotary seal 2 is first pressed into the hole of the sealing assembly mounting base 1 using a special tool. Then, the reverse rotating PTFE combination ring 4 is installed into the mounting groove of the connecting plate 3, with the O-ring 5 at the bottom of the inner groove and the Glyd ring 6 against the O-ring 5. The connecting plate 3 is then pressed into the mounting base 1. Finally, the rotating shaft 7 is fitted into the sealing assembly, taking care not to cut off the lip of the rotary seal 2 or the Glyd ring 6. This completes the installation and allows for normal operation. When the rotating shaft 7 rotates at low speed, although oil may seep out from the reverse rotating PTFE combination ring 4 and the rotating shaft 7, the rotary seal firmly prevents oil leakage. When the rotating shaft 7 rotates at high speed or the internal pressure of the housing increases, the reverse rotating PTFE combination ring 4 activates, protecting the rotary seal from damage by high pressure.
[0019] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. An improved sealing assembly, comprising a mounting base (1), characterized in that: The mounting base (1) is provided with a rotary seal (2) on its inner side. The rotary seal (2) is provided with a connecting plate (3) on its outer side, and the connecting plate (3) is tightly fitted and fixed in the hole of the mounting base (1). The connecting plate (3) is provided with a reverse rotating PTFE combination ring (4) on its inner side. The reverse rotating PTFE combination ring (4) is composed of an O-ring (5) and a Glyd ring (6). The lip of the rotary seal (2) and the Glyd ring (6) are attached to the outer surface of the rotating shaft (7). The reverse rotating PTFE combination ring (4) works with the rotary seal (2) to provide a double seal when the rotating shaft (7) rotates at high speed and the internal pressure of the sealing assembly increases.
2. An improved sealing assembly according to claim 1, characterized in that: The O-ring (5) of the reverse rotating PTFE combination ring (4) is installed at the bottom of the mounting groove inside the connecting plate (3), and the Glyd ring (6) is attached to the inside of the O-ring (5).
3. An improved sealing assembly according to claim 1, characterized in that: The connecting plate (3) and the mounting base (1) are fixed by an interference fit, and the mounting position of the PTFE combination ring (4) and the lip of the rotary seal (2) are axially misaligned.