Multi-channel replaceable high-pressure granular medium rotary sealing structure
By employing a multi-replaceable rotary seal structure for high-pressure particulate media, and utilizing designs such as PTFE sealing rings, retaining springs, and hard alloy coatings, the problem of traditional sealing structures being prone to failure under high pressure is solved, achieving low-cost maintenance and long-lasting sealing.
Patent Information
- Application Number
- CN202520852173.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-03-17
- Estimated Expiration
- 2035-04-30
AI Technical Summary
Traditional sealing structures are prone to failure under high pressure and high particle media conditions, leading to overall leakage, high maintenance costs, and a lack of dynamic adaptability.
It adopts a multi-replaceable high-pressure particulate media rotary sealing structure, including a PTFE sealing ring in the cylinder groove, a retaining spring in the spring mounting groove, a hard alloy coating on the inner wall of the cylinder groove, and an O-ring buffer layer in the final sealing groove. Combined with the arc-shaped chamfer design, it forms a synergistic effect between the modular sealing ring and the retaining spring.
It achieves stable operation under high pressure, reduces maintenance costs, extends seal life, and improves the adaptability and scalability of the seal.
Smart Images
Figure CN224003168U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical seal technology, specifically a multi-channel replaceable high-pressure particulate media rotary seal structure. Background Technology
[0002] Under high pressure and high-particle media conditions, traditional sealing structures suffer from problems such as overall leakage due to single-point failure and high replacement costs after wear. 1. Limitations of single-seal: A single seal is easily worn by particles under high pressure, leading to rapid failure; 2. High maintenance costs: Replacing the entire sealing structure is time-consuming and material-intensive, resulting in significant downtime losses; 3. Poor dynamic adaptability: Lacking a pressure self-compensation mechanism, the sealing interface is prone to detachment due to pressure fluctuations. Utility Model Content
[0003] The technical problem solved by this utility model is to provide a multi-channel replaceable high-pressure particulate media rotary sealing structure to solve the problems mentioned in the background art.
[0004] The technical problem solved by this utility model is achieved by the following technical solution: a multi-channel replaceable high-pressure particulate medium rotary sealing structure, comprising: a cylinder body, wherein a cylinder body groove is provided in the cylinder body groove, wherein a plurality of PTFE sealing rings are provided in the cylinder body groove, wherein a spring mounting groove is provided on one side of the PTFE sealing ring, wherein a retaining spring is provided in the spring mounting groove, wherein the cylinder body is mounted on one side of a rotating shaft, wherein there is a medium pressure between the rotating shaft and the cylinder body, and the retaining spring is embedded in the root of the PTFE sealing ring.
[0005] Furthermore, the contact point between the cylinder groove and the rotating shaft is provided with an arc-shaped chamfer.
[0006] Furthermore, the contact point between the PTFE sealing ring and the rotating shaft is provided with an arc-shaped chamfer.
[0007] Furthermore, the inner wall of the cylinder groove is coated with a hard alloy coating.
[0008] Furthermore, an O-ring buffer layer is provided in the final sealing groove of the cylinder block groove.
[0009] Compared with the prior art, the beneficial effects of this utility model are:
[0010] 1. High pressure adaptability: Multiple seals disperse pressure, enabling stable operation under 40MPa conditions;
[0011] 2. Resistant to particulate wear: Modular design allows for single-point replacement, reducing maintenance costs by 60%;
[0012] 3. Long-lasting seal: The combined effect of spring and pressure extends the seal life by 2 times compared to traditional structures;
[0013] 4. High scalability: The final stage tank can be equipped with an auxiliary seal to adapt to complex working conditions. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model.
[0015] Figure 2 This is a schematic diagram of the medium pressure of this utility model. Detailed Implementation
[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.
[0017] Example 1
[0018] like Figure 1 , Figure 2 As shown, a multi-channel replaceable high-pressure particulate media rotary sealing structure includes: a cylinder body, a cylinder body groove 3 provided in the cylinder body groove 3, a plurality of PTFE sealing rings 1 provided in the cylinder body groove 3, a spring mounting groove provided on one side of the PTFE sealing rings, a retaining spring 2 provided in the spring mounting groove, the cylinder body being mounted on one side of a rotating shaft 4, and there is a medium pressure between the rotating shaft and the cylinder body, with the retaining spring 2 embedded in the root of the PTFE sealing ring 1.
[0019] Example 2
[0020] like Figure 1 , Figure 2 As shown, a multi-channel replaceable high-pressure particulate media rotary sealing structure includes: a cylinder body, a cylinder body groove 3 provided in the cylinder body groove 3, a plurality of PTFE sealing rings 1 provided in the cylinder body groove 3, a spring mounting groove provided on one side of the PTFE sealing rings, a retaining spring 2 provided in the spring mounting groove, the cylinder body being mounted on one side of a rotating shaft 4, a medium pressure existing between the rotating shaft and the cylinder body, and an arc-shaped chamfer provided at the contact point between the cylinder body groove 3 and the rotating shaft 4.
[0021] Example 3
[0022] like Figure 1 , Figure 2As shown, a multi-channel replaceable high-pressure particulate media rotary sealing structure includes: a cylinder body, a cylinder body groove 3 provided in the cylinder body groove 3, a plurality of PTFE sealing rings 1 provided in the cylinder body groove 3, a spring mounting groove provided on one side of the PTFE sealing ring, a retaining spring 2 provided in the spring mounting groove, the cylinder body being mounted on one side of a rotating shaft 4, a medium pressure existing between the rotating shaft and the cylinder body, and an arc-shaped chamfer provided at the contact point between the PTFE sealing ring and the rotating shaft 4.
[0023] Example 4
[0024] like Figure 1 , Figure 2 As shown, a multi-channel replaceable high-pressure particulate media rotary seal structure includes: a cylinder body, a cylinder body groove 3 provided inside the cylinder body groove 3, a plurality of PTFE sealing rings 1 provided inside the cylinder body groove 3, a spring mounting groove provided on one side of the PTFE sealing rings, a retaining spring 2 provided inside the spring mounting groove, the cylinder body being mounted on one side of a rotating shaft 4, and there being a medium pressure between the rotating shaft and the cylinder body; the inner wall of the cylinder body groove is coated with a hard alloy coating (such as WC-Co) to reduce wear.
[0025] Example 5
[0026] like Figure 1 , Figure 2 As shown, a multi-stage replaceable high-pressure particulate media rotary sealing structure includes: a cylinder body, a cylinder body groove 3 provided inside the cylinder body groove 3, a plurality of PTFE sealing rings 1 provided inside the cylinder body groove 3, a spring mounting groove provided on one side of the PTFE sealing rings, a retaining spring 2 provided inside the spring mounting groove, the cylinder body being mounted on one side of a rotating shaft 4, and a medium pressure existing between the rotating shaft and the cylinder body, and an O-ring buffer layer provided in the final sealing groove of the cylinder body groove 3 to absorb pressure pulses.
[0027] like Figure 2 As shown, the operating conditions are: 1. Pressure: above 5 MPa; 2. Medium: liquid containing particulate matter (such as mud); 3. Rotary seal (shaft rotation). Now, assuming the medium enters the groove from the right side due to pressure, the pressure will push the PTFE sealing ring to the left side of the groove, preventing the medium from entering. At this time, due to the larger constant pressure on the right side, the medium will tend to move to the left. Because the shaft rotates, the particulate medium will create two wear surfaces on the seal due to its leftward movement. However, it can only enter the left side after the seal is worn down. Therefore, multiple such sealing products can be used, and a final layer of other forms of enhanced sealing performance can be added.
[0028] The medium (mud environment) enters the sealing groove under pressure. The pressure pushes the PTFE to the left, making it tightly adhered to the left side, ensuring that the medium cannot enter the left side. Particulate impurities (mud and sand) will wear down the PTFE (consumable) during shaft rotation. Cost reduction can be achieved by setting multiple such seals and adding a final, enhanced seal of another type. This is mainly reflected in the fact that such PTFE seals are cheaper and only require periodic replacement. Performance enhancement is achieved by using multiple such PTFE shaft seals to ensure that the medium entering the final seal is free of particulate impurities (the sealing ring is susceptible to damage from particulate impurities) and operates under lower pressure, thus ensuring sealing performance.
[0029] The assembly process of this utility model is as follows: the retaining spring 2 is embedded into the root of the PTFE sealing ring 1 and pressed into the cylinder groove 3 in sequence; the final stage groove is equipped with an O-ring or other sealing element as the final barrier.
[0030] The working process of this utility model is as follows: the medium pressure pushes the PTFE sealing ring 1 to fit tightly against the left side of the groove to form an axial seal; when particulate medium enters, the first PTFE sealing ring 1 wears out first, and the subsequent modules take over the seal in sequence.
[0031] Replacement procedure for this utility model: After removing the end cover, pull out the worn sealing module axially and replace it with a new module.
[0032] This invention achieves long-term sealing and low-cost maintenance under high-pressure conditions through a modular sealing ring and shaft spring design, making it particularly suitable for harsh environments such as mud pumps and mining machinery.
[0033] The sealing module assembly of this utility model includes: multiple PTFE sealing rings: nested on the surface of the rotating shaft, with the inner side of each sealing ring tightly fitted to the shaft and the outer side loosely fitted to the cylinder groove; a shaft-holding spring: a stainless steel helical spring, set at the root of each PTFE sealing ring, providing radial preload; a pressure-driven structure: the medium pressure acts on the outer side of the sealing ring, pushing the sealing ring tightly against the left side wall of the cylinder groove, forming an axial seal; and a modular installation groove: the cylinder body has multiple stepped grooves, with each groove independently installing a sealing module, and the last groove has a reserved interface for expanding other sealing structures (such as lip seals).
[0034] Multi-stage consumable seals: High-pressure media sequentially ruptures the front-end sealing module, while the rear-end module maintains its seal, extending overall lifespan; Spring-pressure dual pre-tightening: A retaining spring provides initial contact force, and media pressure enhances the sealing interface contact; Quick-change design: Single-stage sealing modules can be axially removed without disassembling the entire unit. - The PTFE sealing ring surface is coated with wear-resistant particles (such as silicon carbide), increasing hardness by 30%; An O-ring buffer layer is installed in the final sealing groove to absorb pressure pulses; The inner wall of the cylinder groove is coated with a hard alloy coating (such as WC-Co) to reduce wear.
[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A multi-pass replaceable high pressure granular media rotary seal structure comprising: The cylinder is characterized in that a cylinder groove (3) is arranged in the cylinder, a plurality of PTFE sealing rings (1) are arranged in the cylinder groove (3), a spring mounting groove is arranged on one side of the PTFE sealing ring, a shaft embracing spring (2) is arranged in the spring mounting groove, the cylinder is arranged on one side of a rotating shaft (4), there is medium pressure between the rotating shaft and the cylinder, and the shaft embracing spring (2) is embedded in the root of the PTFE sealing ring (1).
2. A multi-pass replaceable high-pressure particulate media rotary seal structure according to claim 1, wherein: An arc-shaped chamfer is arranged at the contact position between the cylinder groove (3) and the rotating shaft (4).
3. A multi-pass replaceable high pressure particulate media rotary seal structure according to claim 1, wherein: An arc-shaped chamfer is arranged at the contact position between the PTFE sealing ring and the rotating shaft (4).
4. A multi-pass replaceable high pressure particulate media rotary seal structure according to claim 1, wherein: The inner wall of the cylinder groove is coated with a hard alloy coating.
5. A multi-pass replaceable high pressure particulate media rotary seal structure according to claim 1, wherein: An O-ring buffer layer is arranged in the final sealing groove of the cylinder groove (3).