A floating ring with a polytetrafluoroethylene sealing ring

Abstract

This utility model belongs to the technical field of mechanical seals, specifically relating to a floating ring with a polytetrafluoroethylene (PTFE) sealing ring. The floating ring includes a floating seal seat, a floating seal ring, a circular ring, and a sealing ring. The circular ring is fixedly connected to the inner wall of the floating seal seat, and the floating seal ring is fixedly connected to one side of the circular ring. Both the floating seal ring and the circular ring are located inside the floating seal seat. The outer side of the floating seal ring is in close contact with the inner wall of the sealing ring. The bottom edge of the floating seal ring and the bottom edge of the floating seal seat are on the same horizontal line. The sealing ring is fitted onto the outer side of the floating seal seat. Using polytetrafluoroethylene (PTFE) as the main material for the floating ring and other sealing components, PTFE has an extremely low coefficient of friction, making it resistant to wear under high-pressure fluid impact and mechanical reciprocating motion. This significantly extends the service life of the seals and reduces the risk of leakage due to wear. PTFE maintains stable physical properties within a wide temperature range of -200℃ to +260℃, preventing rubber materials from failing due to high-temperature softening or low-temperature hardening, making it suitable for harsher working environments.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical seal technology, specifically relating to a floating ring with a polytetrafluoroethylene sealing ring. Background Technology

[0002] In industrial fluid control systems, the sealing performance of small metal parts directly affects the reliability and service life of the equipment. Currently, the mainstream sealing solution on the market mostly uses O-rings made of nitrile rubber (NBR), which is widely used in various valve body structures due to its good elasticity and oil resistance. However, the physical properties of nitrile rubber are quite sensitive to temperature changes. In high or low temperature environments, it is prone to hardening, softening, or permanent deformation, leading to seal failure. In addition, under the frequent impact of high-pressure fluids and mechanical friction, O-rings are prone to wear and aging, thus losing their sealing ability and causing problems such as hydraulic oil leakage and pressure imbalance, seriously affecting the stability of equipment operation.

[0003] The floating ring in a solenoid valve is a key functional component. Its core function is to dynamically compensate for changes in the fit clearance caused by wear or thermal expansion and contraction, maintain sealing through adaptive adjustment, and balance the pressure difference between the inside and outside of the valve body to ensure precise fluid control and vibration damping. However, traditional rubber floating rings lack durability under high-pressure and high-frequency conditions, and are prone to plastic deformation or fatigue cracking after long-term use, making it difficult to meet the increasingly demanding performance requirements of industrial equipment. Therefore, developing a floating ring material or structural optimization scheme with strong temperature resistance, high wear resistance, and adaptability to complex operating conditions has become an important research direction for improving the sealing reliability and lifespan of solenoid valves. Utility Model Content

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one aspect of the present invention is to provide a floating ring with a polytetrafluoroethylene sealing ring. The floating ring includes a floating seal seat, a floating seal ring, a circular ring, and a sealing ring. The circular ring is fixedly connected to the inner wall of the floating seal seat, and the floating seal ring is fixedly connected to one side of the circular ring. Both the floating seal ring and the circular ring are disposed inside the floating seal seat. The outer side of the floating seal ring is in close contact with the inner wall of the sealing ring. The bottom edge of the floating seal ring is on the same horizontal line as the bottom edge of the floating seal seat. The sealing ring is sleeved on the outer side of the floating seal seat.

[0005] Preferably, the floating seal seat includes a groove, and the sealing ring is sleeved in the groove.

[0006] Preferably, the outer surface of the floating seal ring is designed to be smooth. This reduces friction, thereby reducing the heat generated during relative rotation.

[0007] Preferably, the sealing ring material is polytetrafluoroethylene.

[0008] Preferably, the sealing ring material is polytetrafluoroethylene, molybdenum disulfide, and glass fiber.

[0009] Preferably, the polytetrafluoroethylene fine powder accounts for 80% of the total mass.

[0010] Preferably, the sealing ring has a circular structure and a rectangular side section.

[0011] Preferably, the sealing ring side profile structure and the groove side profile structure are the same.

[0012] Preferably, the sealing ring is shaped using a heat-shrink mold.

[0013] Preferably, the sealing ring is shaped at a temperature of 120℃-300℃.

[0014] The beneficial effects of this utility model are as follows:

[0015] Using polytetrafluoroethylene (PTFE) as the main material for sealing components such as floating rings offers significant performance advantages compared to traditional nitrile rubber (NBR) O-rings.

[0016] Excellent wear resistance: PTFE has an extremely low coefficient of friction and is not easily worn under high pressure fluid impact and mechanical reciprocating motion, which can significantly extend the service life of seals and reduce the risk of leakage caused by wear.

[0017] Excellent temperature resistance: PTFE maintains stable physical properties in a wide temperature range of -200℃ to +260℃, avoiding the failure of rubber materials due to high temperature softening or low temperature hardening, making it suitable for more demanding working environments.

[0018] Excellent corrosion resistance: PTFE has extremely strong chemical inertness to media such as acids, alkalis, solvents and hydraulic oils, and can withstand the erosion of corrosive fluids for a long time, ensuring reliable sealing.

[0019] Low deformation and high dimensional stability: PTFE material is not prone to permanent deformation and can maintain its original shape under long-term pressure or temperature fluctuations, effectively maintaining the compensation ability of the sealing gap.

[0020] Overall performance improvement: By using PTFE material, the sealing effect and service life of the floating ring are significantly improved, reducing equipment maintenance frequency and downtime losses. At the same time, it reduces the risk of hydraulic system failure due to seal failure, and improves the overall operating efficiency and economy of the solenoid valve.

[0021] Additional aspects and advantages of this invention will become apparent from the description which follows, or may be learned by practice of this invention. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 This is a side sectional view of the floating ring with a polytetrafluoroethylene sealing ring of this utility model;

[0024] Figure 2 This is a schematic diagram of the sealing ring structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the installation of the sealing ring of this utility model;

[0026] Figure 4 This is a schematic diagram of the installation of the sealing ring of this utility model;

[0027] Figure 5 This is a schematic diagram of the installation of the sealing ring of this utility model;

[0028] Figure 6 This is a schematic diagram of the installation of the sealing ring of this utility model;

[0029] The correspondence between the reference numerals and component names in the figure is as follows:

[0030] 1 is the floating seal seat, 11 is the groove, 2 is the floating seal ring, 3 is the circular ring, 4 is the sealing ring, and 5 is the heat shrink mold. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The floating ring with a polytetrafluoroethylene sealing ring of this utility model includes a floating seal seat 1, a groove 11, a floating seal ring 2, a circular ring 3, a sealing ring 4, and a heat shrink mold 5.

[0034] like Figure 1 As shown, a circular ring 3 is fixedly connected to the inner wall of the floating seal seat 1, and a floating seal ring 2 is fixedly connected to one side of the circular ring 3. Both the floating seal ring 2 and the circular ring 3 are located inside the floating seal seat 1. The outer side of the floating seal ring 2 is in close contact with the inner wall of the sealing ring 4. The bottom edge of the floating seal ring 2 and the bottom edge of the floating seal seat 1 are on the same horizontal line. The sealing ring 4 is fitted inside the groove 11.

[0035] The outer surface of the floating seal ring 2 is designed to be smooth, which reduces friction and thus reduces heat generated during relative rotation. The sealing ring 4 is a circular ring structure with a rectangular side profile, and is made of fine polytetrafluoroethylene powder (80% of total mass), molybdenum disulfide, and glass fiber. The side profile of the sealing ring 4 is the same as that of the groove 11, as shown below. Figure 2 As shown.

[0036] The sealing ring 4 is shaped using a heat shrink mold 5, with a shaping temperature of 120℃-300℃.

[0037] like Figure 3-6 As shown, during installation, first place the conical fixture on the floating seal ring 2, then put the PTFE sealing ring 4 onto the conical fixture, press down on the sealing ring 4 so that it fits into the groove 11, and heat shrink and shape it by the heat shrink mold 5. The shaping temperature is 120℃-300℃. Then take out the floating ring with the PTFE sealing ring to complete the wrapping.

[0038] The above description only describes the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model, and all such changes should be included within the protection scope of the present utility model.

Claims

1. A floating ring with a polytetrafluoroethylene seal ring, characterized by: The floating ring includes a floating seal seat (1), a floating seal ring (2), a circular ring (3) and a sealing ring (4). The circular ring (3) is fixedly connected to the inner wall of the floating seal seat (1), and the floating seal ring (2) is fixedly connected to one side of the circular ring (3). The floating seal ring (2) and the circular ring (3) are both located inside the floating seal seat (1). The outer side of the floating seal ring (2) is in close contact with the inner wall of the sealing ring (4). The bottom edge of the floating seal ring (2) is on the same horizontal line as the bottom edge of the floating seal seat (1). The sealing ring (4) is sleeved on the outer side of the floating seal seat (1).

2. A floating ring with a polytetrafluoroethylene seal ring according to claim 1, characterized in that: The floating seal seat (1) includes a groove (11), and the sealing ring (4) is sleeved in the groove (11).

3. A floating ring with a PTFE seal ring according to claim 2, characterized in that: The outer surface of the floating seal ring (2) is designed to be smooth.

4. The floating ring with a polytetrafluoroethylene seal ring according to claim 1, characterized in that: The sealing ring (4) is made of polytetrafluoroethylene.

5. A floating ring with a polytetrafluoroethylene seal ring according to claim 4, characterized in that: The sealing ring (4) is made of polytetrafluoroethylene, molybdenum disulfide and glass fiber.

6. A floating ring with a polytetrafluoroethylene seal ring according to claim 5, characterized in that: The polytetrafluoroethylene fine powder accounts for 80% of the total mass.

7. A floating ring with a polytetrafluoroethylene seal ring according to claim 2, characterized in that: The sealing ring (4) is a circular ring structure, and the side section of the sealing ring (4) is rectangular.

8. A floating ring with a PTFE seal ring according to claim 7, characterized in that: The side profile structure of the sealing ring (4) is the same as that of the groove (11).

9. The floating ring with a polytetrafluoroethylene seal ring according to claim 1, characterized in that: The sealing ring (4) is shaped by the heat shrink mold (5) used for installation.

10. The floating ring with a polytetrafluoroethylene seal ring according to claim 1, characterized in that: The sealing ring (4) is shaped at a temperature of 120℃-300℃.

Images