High-pressure composite sealing ring

Abstract

The utility model discloses a high-pressure composite sealing ring. According to the high-pressure composite sealing ring, the mechanical outer cover is additionally arranged outside the O-shaped rubber ring, the cross section of the mechanical outer cover is octagonal, polytetrafluoroethylene or a polytetrafluoroethylene modified material is adopted, the high-pressure composite sealing ring is placed in the mechanical seal, the contact face with the mechanical seal is small, and friction resistance is small; and when high pressure is applied, the generated deformation is small. The high-pressure composite sealing ring reduces the risk of mechanical sealing deformation, improves the mechanical sealing effect, and is suitable for high-pressure mechanical sealing occasions.

Description

Technical Field

[0001] The utility model relates to the field of mechanical seals, in particular to a high-pressure composite seal ring. Background Art

[0002] In the field of mechanical seals, O-rings are often used as sealing rings. Under high-pressure working conditions, rubber O-rings can severely deform. In some applications requiring reciprocating motion and sealing, large O-ring deformation increases the contact area with the component, increasing friction; if there are gaps, there is a risk of O-ring extrusion. In some high-pressure applications, due to the deformation of O-rings under pressure, a spring-actuated sealing ring, also known as a Variseal ring, is used. This ring consists of an annular outer casing and a metal spring. However, the Variseal ring is too rigid, and when the mechanical seal is made of graphite, it can easily cause deformation of the mechanical seal and the sealing ring, thus affecting the mechanical seal's effectiveness. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the O-ring is too soft, and is easily deformed by pressure and easily slipped out due to large friction, while the universal seal is too hard, and is easily deformed by the mechanical seal, resulting in reduced mechanical sealing effect. A high-pressure composite sealing ring is provided.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] In the first aspect, the utility model provides a high-pressure composite sealing ring. The high-pressure composite sealing ring comprises: a mechanical outer shell and an O-ring, wherein the mechanical outer shell is a circular ring with an octagonal cross section.

[0006] An open groove is provided on one side of the mechanical outer package for placing the O-ring.

[0007] Preferably, the open groove divides the mechanical outer package into an upper cross-sectional end, a lower cross-sectional end and a side cross-sectional end;

[0008] The O-ring is placed in the open groove and fits with the upper section end and the lower section end.

[0009] Preferably, the ring diameter of the O-ring is smaller than the groove diameter of the open groove.

[0010] Preferably, the mechanical outsourcing is made of polytetrafluoroethylene material or polytetrafluoroethylene modified material, and the O-ring is a rubber O-ring.

[0011] Preferably, the O-ring is deformed by force and contacts the side section end.

[0012] The positive and progressive effect of this utility model lies in: this embodiment provides a high-pressure composite seal ring. This high-pressure composite seal ring is constructed by adding a mechanical sheath to the outside of a rubber O-ring. The mechanical sheath is an octagonal ring made of polytetrafluoroethylene or a modified polytetrafluoroethylene material. When placed within a mechanical seal, it minimizes contact with the mechanical seal and produces low frictional resistance. When subjected to high pressure, it exhibits minimal deformation, thereby reducing the risk of mechanical seal deformation and improving the mechanical seal's effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of a high-pressure composite sealing ring according to an embodiment of the present utility model.

[0014] Figure 2 This is a schematic structural diagram of the mechanical outsourcing of an embodiment of the present utility model.

[0015] Figure 3 This is the usage of the high-pressure composite sealing ring according to the embodiment of the present utility model.

[0016] Legend: 1. Mechanical outsourcing; 2. O-ring; 3. Open groove; 4. Upper section end; 5. Lower section end; 6. Side section end; 7. Mechanical seal; 8. Metal surface of mechanical seal; 9. Mechanical seal moving ring. DETAILED DESCRIPTION

[0017] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0018] Example 1

[0019] like Figure 1 As shown, this embodiment provides a high-pressure composite sealing ring. The high-pressure composite sealing ring includes a mechanical outer shell 1 and an O-ring 2. The mechanical outer shell 1 is a circular ring with an octagonal cross section. One side of the mechanical outer shell 1 is provided with an open groove 3 for accommodating the O-ring 2.

[0020] like Figure 1 As shown, in this embodiment, the open groove 3 divides the mechanical outer package 1 into an upper cross-sectional end 4, a lower cross-sectional end 5, and a side cross-sectional end 6. The O-ring 2 is placed in the open groove 3, fitting over the upper and lower cross-sectional ends 4. Specifically, the cross-section of the mechanical outer package 1 is U-shaped, with the side cross-sectional end 6 corresponding to the open edge of the open groove 3, resulting in a rectangular cross-section. The cross-sections of the upper and lower cross-sectional ends 4 and 5 are symmetrical "bracket" shapes. The diameter of the O-ring 2 is smaller than the diameter of the open groove 3. Initially, the O-ring fits over the upper and lower cross-sectional ends 4 and 6. Under high pressure, the mechanical outer package 1 is deformed by the pressure, causing the internal O-ring 2 to compress and fit over the side cross-sectional ends 6.

[0021] like Figure 2As shown, in this embodiment, the mechanical outer package 1 is made of polytetrafluoroethylene (PTFE) or a modified PTFE material, and the O-ring 2 is a rubber O-ring. Specifically, the modified PTFE material used in the mechanical outer package 1 includes modified materials such as graphite, glass fiber, and molybdenum disulfide added to PTFE. The mechanical outer package 1 made of PTFE or a modified PTFE material has a low coefficient of friction, resulting in low frictional resistance against the metal surface 8 of the mechanical seal 7 when installed. This reduces the mechanical seal 7's deformation when subjected to high pressure. The rubber O-ring provides a reverse elastic force to the mechanical outer package 1 when compressed, increasing its resistance to pressure deformation, reducing the risk of deformation of the mechanical seal 7 and the sealing ring, and improving the mechanical seal's effectiveness.

[0022] like Figure 3 As shown, in this embodiment, the high-pressure composite sealing ring is placed on the mechanical seal dynamic ring 9, the upper section end 4 and the side section end 6 of the mechanical outer package 1 are in contact with the surface of the mechanical seal dynamic ring 9, and the lower section end 5 is in contact with the mechanical seal metal surface 8, which is used to seal the mechanical seal dynamic ring 9.

[0023] This embodiment provides a high-pressure composite seal ring. This high-pressure composite seal ring is constructed by adding a mechanical sheath to the outside of a rubber O-ring. The sheath is an octagonal ring made of polytetrafluoroethylene (PTFE) or a modified polytetrafluoroethylene material. When placed within a mechanical seal, it minimizes contact with the seal and produces low frictional resistance. When subjected to high pressure, it exhibits minimal deformation, reducing the risk of mechanical seal deformation and improving sealing effectiveness.

[0024] The working principle of this utility model is as follows: a rubber O-ring 2 is placed in an open groove 3 of a mechanical outer package 1 to form a high-pressure composite seal ring. This high-pressure composite seal ring is then placed in a mechanical seal 7 and mounted on a mechanical seal dynamic ring 9. The mechanical outer package 1 is an octagonal ring made of polytetrafluoroethylene or a modified polytetrafluoroethylene material. This has a small contact area with the metal shaft surface 8 of the mechanical seal, resulting in low friction resistance. This minimizes deformation of the mechanical seal 7, allowing it to be used under high pressure without affecting the mechanical seal's effectiveness.

[0025] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A high-pressure composite sealing ring, characterized in that: The high-pressure composite sealing ring includes: a mechanical outer package and an O-ring, wherein the mechanical outer package is a circular ring with an octagonal cross section. An open groove is provided on one side of the mechanical outer package for placing the O-ring; The mechanical outer cover is made of polytetrafluoroethylene material or polytetrafluoroethylene modified material, and the O-ring is a rubber O-ring.

2. The high-pressure composite sealing ring according to claim 1, characterized in that: The open slot divides the mechanical package into an upper section end, a lower section end, and a side section end; The O-ring is placed in the open groove and fits with the upper section end and the lower section end.

3. The high-pressure composite sealing ring according to claim 2, characterized in that: The ring diameter of the O-ring is smaller than the groove diameter of the open groove.

4. The high-pressure composite sealing ring according to claim 3, characterized in that: The O-ring is deformed by force and contacts the side section end.

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