Mechanical sealing structure suitable for corrosive medium
By using corrosion-resistant materials and structures in mechanical seals, such as ceramic ring seats, filler rings and anti-corrosion elastic parts, the problems of insufficient sealing performance and easy damage in the prior art are solved, and high corrosion resistance in strong corrosion environments are achieved and sealing effect.
Patent Information
- Application Number
- CN202420401644.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-01
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-03-01
AI Technical Summary
Existing mechanical seals are prone to damage in environments of strong corrosion fluids and flammable and explosive media, with insufficient sealing performance, risk of leakage, and simple structure, making it difficult to meet high corrosion resistance requirements.
Use components such as ceramic ring seats, filler rings, seal rings and anti-corrosion elastic parts to cover the inner bones through a polymer sleeve, set up convex structures and sliding sockets, and use corrosion-resistant materials such as alumina ceramics, neoprene and poly Tetrafluoroethylene, etc., form a corrosion-resistant sealing structure.
It improves the corrosion resistance and sealing performance of mechanical seals, avoids leakage of corrosive media, ensures long-term and stable operation in a corrosive environment, and reduces safety hazards.
Smart Images
Figure CN222208985U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical seals, in particular to a mechanical seal structure suitable for corrosive media. Background Art
[0002] Mechanical seal is a common device used to prevent fluid (liquid or gas) leakage, usually used in pumps, valves, agitators and other equipment. It consists of multiple components, including sealing rings, sealing surfaces, springs, sealing seats, etc. When used in working media environments with highly corrosive fluids, crystallization, and flammable and explosive leaks, the corrosion resistance of the mechanical seal needs special attention, and the sealing performance of the mechanical seal must be guaranteed to avoid leakage and safety accidents. In the mechanical seals of the prior art, the structure is usually too simple, the sealing performance needs to be improved, and it is easy to be corroded and damaged in some corrosive media environments such as reactors. In view of this, research and improvement are conducted on the existing problems, and a mechanical seal structure suitable for corrosive media is provided to solve the current problems. The purpose is to achieve the purpose of solving the problems and improving the practical value through this technology. Utility Model Content
[0003] The utility model aims to solve one of the technical problems existing in the prior art or related technology.
[0004] To this end, the technical solution adopted by the utility model is: a mechanical sealing structure suitable for corrosive media, including: a first ceramic ring seat, a second ceramic ring seat and a dynamic ring seat, the inner sides of the first ceramic ring seat and the second ceramic ring seat are both provided with packing rings, and the inner sides of the packing rings are sleeved with sealing rings, the inner sides of the packing rings are provided with a plurality of ridge structures, the surfaces of the first ceramic ring seat and the second ceramic ring seat are provided with limiting ears, and the limiting ears on the surfaces of the first ceramic ring seat and the second ceramic ring seat are arranged in meshing with each other, the surfaces of the limiting ears are provided with sliding sleeve holes, the surface of the dynamic ring seat is provided with guide pins slidably sleeved on the inner sides of the sliding sleeve holes, the surface of the dynamic ring seat is provided with a plurality of through holes and sleeved with an anti-corrosion elastic part, the two ends of the anti-corrosion elastic part are abutted with slip rings, the slip rings are sleeved on the edges of the first ceramic ring seat and the second ceramic ring seat and slidably abut against the surface of the packing ring, the anti-corrosion elastic part includes a polymer sheath and an inner bone, and the polymer sheath is coated on the surface of the inner bone.
[0005] In a preferred example, the utility model can be further configured as follows: the inner ridges of the packing ring are arranged in a spiral shape and are located on the upper and lower sides of the sealing ring, and the inner side of the packing ring is provided with a sleeve groove that matches the sealing ring.
[0006] In a preferred example, the utility model can be further configured as follows: the sleeve hole is a long hole structure and is arranged in parallel with the limiting ear, and the guide pin passes through the sleeve hole and is fixedly connected to the surface of the moving ring seat.
[0007] In a preferred example, the utility model can be further configured as follows: a pressure pad touch layer is fixedly adhered to the inner side of the dynamic ring seat, and the pressure pad touch layer is a silicone pad layer structure.
[0008] In a preferred example, the utility model can be further configured as follows: the first ceramic ring seat, the second ceramic ring seat and the dynamic ring seat are components made of alumina ceramic material, and the packing ring and the sealing ring are made of one of chloroprene rubber or fluororubber.
[0009] In a preferred example, the utility model can be further configured as follows: the inner frame is a nickel-based alloy or titanium alloy component, and the polymer sleeve and the sliding ring are polytetrafluoroethylene components.
[0010] The beneficial effects achieved by the utility model are:
[0011] 1. In the utility model, a new type of anti-corrosion elastic member is provided, and a polymer sleeve layer formed of anti-corrosion material is used to cover the inner frame, so as to form a corrosion-resistant structure to replace the original metal spring as the axial push structure of the slip ring, and corrosion-resistant materials are selected as the main components of the mechanical seal, so as to ensure that the mechanical seal has good chemical stability and corrosion resistance, and can operate stably for a long time in corrosive media.
[0012] 2. In the utility model, a plurality of elastic ridge structures are arranged on the surface of the packing ring and the sealing ring, so that expansion contact is performed when in contact with the shaft surface, thereby improving the sealing performance of the joint with the shaft surface, preventing the corrosive medium from leaking into the interior of the mechanical seal, and further improving the corrosion resistance of the mechanical seal. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;
[0014] Figure 2 This is a schematic diagram of the exploded structure of an embodiment of the utility model;
[0015] Figure 3 This is a schematic diagram of the partial cross-sectional structure of an anti-corrosion elastic component machine according to one embodiment of the utility model.
[0016] Reference numerals:
[0017] 1. First ceramic ring seat; 2. Second ceramic ring seat; 3. Dynamic ring seat; 4. Packing ring; 5. Sealing ring; 6. Anti-corrosion elastic part; 7. Sliding ring; 11. Limiting ear; 12. Sliding sleeve hole; 13. Guide pin; 31. Pressure pad contact layer; 61. Polymer sleeve layer; 62. Inner bone. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.
[0019] A mechanical sealing structure suitable for corrosive media provided by some embodiments of the utility model is described below in conjunction with the accompanying drawings.
[0020] Combination Figure 1-3 As shown, the utility model provides a mechanical seal structure suitable for corrosive media, comprising: a first ceramic ring seat 1, a second ceramic ring seat 2 and a dynamic ring seat 3, the inner sides of the first ceramic ring seat 1 and the second ceramic ring seat 2 are both provided with a packing ring 4, and the inner side of the packing ring 4 is sleeved with a sealing ring 5, the inner side of the packing ring 4 is provided with a plurality of convex ridge structures, the surfaces of the first ceramic ring seat 1 and the second ceramic ring seat 2 are provided with limiting ears 11, and the limiting ears 11 on the surfaces of the first ceramic ring seat 1 and the second ceramic ring seat 2 are meshed with each other Arrangement, a sliding hole 12 is provided on the surface of the limiting ear 11, a guide pin 13 slidably sleeved on the inner side of the sliding hole 12 is provided on the surface of the moving ring seat 3, a plurality of through holes are provided on the surface of the moving ring seat 3 and sleeved with an anti-corrosion elastic member 6, both ends of the anti-corrosion elastic member 6 are abutted with slip rings 7, the slip rings 7 are sleeved on the first ceramic ring seat 1 and the second ceramic ring seat 2 and slidably abut against the surface of the packing ring 4, the anti-corrosion elastic member 6 includes a polymer sleeve layer 61 and an inner frame 62, and the polymer sleeve layer 61 is coated on the surface of the inner frame 62.
[0021] In this embodiment, the inner ridges of the packing ring 4 are arranged in a spiral shape and are located at the upper and lower sides of the sealing ring 5 . The inner side of the packing ring 4 is provided with a sleeve groove matched with the sealing ring 5 .
[0022] Specifically, when the first ceramic ring seat 1 and the second ceramic ring seat 2 are sleeved on the surface of the moving shaft, the ridges on the surface of the packing ring 4 are compressed to form a packing-like sealing abutment structure, which together with the sealing ring 5 realizes the sealing between the first ceramic ring seat 1 and the second ceramic ring seat 2 and the shaft surface to prevent the infiltration of corrosive media.
[0023] In this embodiment, the sleeve hole 12 is a long hole structure and is arranged in parallel with the limiting ear 11 . The guide pin 13 passes through the sleeve hole 12 and is fixedly connected to the surface of the moving ring seat 3 .
[0024] In this embodiment, a pressure pad touch layer 31 is fixedly adhered to the inner side of the dynamic ring seat 3 , and the pressure pad touch layer 31 is a silicone pad structure.
[0025] Specifically, the pressure pad contact layer 31 is used to isolate the direct contact between the dynamic ring seat 3 and the surface of the dynamic shaft, so as to prevent the corrosive medium that penetrates along the surface of the dynamic shaft from directly contacting the dynamic ring seat 3 .
[0026] In this embodiment, the first ceramic ring seat 1, the second ceramic ring seat 2 and the dynamic ring seat 3 are made of alumina ceramics, and the packing ring 4 and the sealing ring 5 are made of chloroprene rubber or fluororubber.
[0027] In this embodiment, the inner frame 62 is made of nickel-based alloy or titanium alloy, and the polymer sleeve 61 and the sliding ring 7 are made of polytetrafluoroethylene.
[0028] Specifically, polytetrafluoroethylene (PTFE) springs have excellent corrosion resistance and chemical resistance and are widely used in corrosive environments. As a wrapping material for the inner bone 62, they can effectively prevent corrosion of the inner bone 62. The inner bone 62 made of corrosion-resistant materials such as nickel-based alloys and titanium alloys can replace traditional steel springs and have stronger elastic properties.
[0029] The working principle and use process of this utility model:
[0030] In the operation of the mechanical seal, the first ceramic ring seat 1 and the second ceramic ring seat 2 are fixed on the inner side of the static sleeve, and the dynamic ring seat 3 is fixed on the surface of the dynamic shaft. The dynamic ring seat 3 is used to slide and rotate inside the first ceramic ring seat 1 and the second ceramic ring seat 2 as a supporting structure of the dynamic shaft. Alumina ceramic is one of the most commonly used ceramic materials, and has good wear resistance and chemical stability. It is used to manufacture the first ceramic ring seat 1 and the second ceramic ring seat 2, which can effectively cope with high-speed and high-temperature environments, and has high hardness, wear resistance, corrosion resistance and high-temperature performance. Further, the surface of the dynamic ring seat 3 is pressed by the pad contact layer 31 to contact the shaft surface to avoid contact with the steam of the corrosive medium. The polymer sleeve layer 61 formed by the anti-corrosion material is used to cover the inner frame 62 to form a corrosion-resistant structure to replace the original metal spring as the axial push structure of the slip ring 7, and corrosion-resistant materials are selected as the main components of the mechanical seal to ensure that the mechanical seal has good chemical stability and corrosion resistance.
[0031] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A mechanical seal structure suitable for corrosive media, characterized in that: include: A first ceramic ring seat (1), a second ceramic ring seat (2) and a dynamic ring seat (3), wherein the inner sides of the first ceramic ring seat (1) and the second ceramic ring seat (2) are both provided with a packing ring (4), and the inner sides of the packing rings (4) are sleeved with a sealing ring (5), and the inner sides of the packing rings (4) are provided with a plurality of ridge structures, and the surfaces of the first ceramic ring seat (1) and the second ceramic ring seat (2) are provided with limiting ears (11), and the limiting ears (11) on the surfaces of the first ceramic ring seat (1) and the second ceramic ring seat (2) are arranged in meshing engagement with each other, and the surfaces of the limiting ears (11) are provided with a sliding sleeve hole (11) 2), the surface of the moving ring seat (3) is provided with a guide pin (13) which is slidably sleeved on the inner side of the sliding sleeve hole (12), the surface of the moving ring seat (3) is provided with a plurality of through holes and sleeved with an anti-corrosion elastic member (6), both ends of the anti-corrosion elastic member (6) are abutted with a sliding ring (7), the sliding ring (7) is sleeved on the first ceramic ring seat (1) and the second ceramic ring seat (2) and is slidably abutted with the surface of the packing ring (4), the anti-corrosion elastic member (6) includes a polymer sleeve layer (61) and an inner frame (62), the polymer sleeve layer (61) is coated on the surface of the inner frame (62).
2. A mechanical seal structure suitable for corrosive media according to claim 1, characterized in that: The inner ridges of the packing ring (4) are arranged in a spiral shape and are located on the upper and lower sides of the sealing ring (5). The inner side of the packing ring (4) is provided with a sleeve groove matched with the sealing ring (5).
3. A mechanical seal structure suitable for corrosive media according to claim 1, characterized in that: The sleeve hole (12) is a long hole structure and is arranged in parallel with the limiting ear (11); the guide pin (13) passes through the sleeve hole (12) and is fixedly connected to the surface of the moving ring seat (3).
4. A mechanical seal structure suitable for corrosive media according to claim 1, characterized in that: A pressure pad touch layer (31) is fixedly adhered to the inner side of the dynamic ring seat (3), and the pressure pad touch layer (31) is a silicone pad layer structure.
5. The mechanical seal structure suitable for corrosive media according to claim 1, characterized in that: The first ceramic ring seat (1), the second ceramic ring seat (2) and the dynamic ring seat (3) are components made of alumina ceramic material, and the packing ring (4) and the sealing ring (5) are both made of one of chloroprene rubber and fluororubber.
6. A mechanical seal structure suitable for corrosive media according to claim 1, characterized in that: The inner frame (62) is a component made of nickel-based alloy or titanium alloy, and the polymer sleeve (61) and the sliding ring (7) are components made of polytetrafluoroethylene.