Self-compensating sealing filler group
By designing a sealing filler group with filler rings and sealing rings with different outer diameter segments, the problem of difficult to achieve both self-compensation and self-lubrication functions in the prior art is solved, and the self-compensation and wear resistance of the sealing filler group are improved.
Patent Information
- Application Number
- CN202421790411.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-26
AI Technical Summary
The existing self-compensation sealing filler sets are difficult to achieve both self-compensation and self-lubrication functions, resulting in poor sealing effect and rapid wear.
A sealing packing group including a body, a shaft, a packing ring and a sealing ring is designed. The packing ring has a first and a second section of different outer diameters, and the first and second sealing rings are respectively used to provide abutting force and sealing force between the inner wall of the packing ring and the shaft member.
The self-compensation function of the sealing filler group is realized, which reduces the friction force of the shaft member rotation, and improves the stability and wear resistance of the seal.
Smart Images
Figure CN222848694U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of packing seals, and in particular to a self-compensating sealing packing group. Background Art
[0002] Self-compensating sealing packing group is a high-performance sealing device designed for dynamic sealing environment. It is widely used in shaft seals of pumps, valves, agitators and other equipment, especially suitable for sealing of high temperature, high pressure, corrosive or solid particle containing media in chemical, petroleum, electric power, papermaking and other industries.
[0003] The self-compensating sealing packing group in the prior art usually adopts a V-shaped plastic sealing packing group or an O-shaped rubber sealing group to achieve the sealing between the shaft and the sleeve. However, the V-shaped plastic sealing packing group has a large opening and closing torque and does not have the function of automatic compensation for wear. The compensating seal can only be achieved through external clamping force. The O-shaped rubber sealing group wears quickly and does not have a self-lubricating function. Utility Model Content
[0004] The utility model provides a self-compensating sealing packing group, which solves the problem in the related art that the self-compensating and self-lubricating functions of the sealing packing group are difficult to realize simultaneously.
[0005] The technical solution of the utility model is as follows:
[0006] A self-compensating sealing packing group, comprising:
[0007] A main body having a through hole, wherein a limiting ring is provided in the through hole;
[0008] A shaft member is rotatably disposed in the through hole, and a gap is provided between an outer wall of the shaft member and an inner wall of the through hole;
[0009] A packing ring is sleeved on the shaft and located in the gap. The packing ring is slidably arranged relative to the shaft. The sliding direction of the packing ring is parallel to the axis direction of the shaft. The packing ring has a first section and a second section. The first section has the same inner diameter as the second section. The outer diameter of the first section is larger than the outer diameter of the second section. The second section is closer to the limiting ring than the first section. The limiting ring is used to limit the sliding distance of the packing ring.
[0010] The first sealing ring is sleeved on the shaft and is located between the packing ring and the limiting ring. After the packing ring slides toward the limiting ring, two ends of the first sealing ring respectively abut against the packing ring and the limiting ring, and the first sealing ring provides a force for the inner wall of the second section to abut against the shaft.
[0011] Optionally, the packing ring and the shaft are arranged to slide and rotate relative to each other.
[0012] Optionally, there are a plurality of packing rings, which are arranged in an array along the axis direction of the shaft, and the plurality of packing rings are slidably arranged relative to the shaft, and the sliding directions are parallel to the axis direction of the shaft, and the plurality of packing rings abut against each other or move away from each other after sliding, and further comprising:
[0013] There are a plurality of second sealing rings, all of which are sleeved on the shaft. The plurality of second sealing rings are spaced apart along the axial direction of the shaft and are respectively located between two adjacent packing rings. When the two adjacent packing rings approach each other, the second sealing ring is compressed. The second sealing ring is used to provide a force for the inner wall of the second section to abut against the shaft.
[0014] Optionally, the packing ring is an L-shaped plastic packing ring.
[0015] Optionally, the first sealing ring and the second sealing ring are both O-shaped rubber rings.
[0016] Optionally, the outer diameter of the second section of the same packing ring gradually decreases in a direction away from the first section.
[0017] Optionally, it also includes:
[0018] A clamping piece is slidably arranged in the through hole, and the plurality of packing rings, the first sealing ring, and the second sealing ring are all located between the clamping piece and the limiting ring. After sliding, the clamping piece approaches or moves away from the limiting ring, and the clamping piece is used to press the packing ring toward the limiting ring.
[0019] Optionally, the first section of the outer wall and the inner wall of the through hole are sealed and slidable.
[0020] Optionally, the outer wall of the shaft member abuts against the inner wall of the limiting ring.
[0021] Optionally, the through hole has a limiting platform, and after the pressing member slides close to the limiting ring, the pressing member abuts against the limiting platform.
[0022] The working principle and beneficial effects of the utility model are:
[0023] In the utility model, the shaft is rotatably arranged relative to the main body, and there is a gap between the outer wall of the shaft and the inner wall of the through hole, the packing ring is sleeved on the shaft, the shaft is rotatably arranged relative to the packing ring, the inner wall and the outer wall of the packing ring are respectively in contact with the outer wall of the shaft and the inner wall of the through hole, the packing ring can slide relative to the shaft, and the packing ring stops sliding when it slides to contact with the limit ring. The packing ring is arranged into a first section and a second section with different outer diameters, and the outer diameter of the first section is larger than the outer diameter of the second section, the outer wall of the first section is in contact with the inner wall of the through hole, and the second section is closer to the limit ring than the first section, and the space between the outer diameter difference between the first section and the second section is provided for the first sealing ring, so that when the packing ring slides close to the limit table, the first sealing ring can be compressed into the space generated by the outer diameter difference between the first section and the second section.
[0024] The packing ring can be made of materials such as plastic, nylon, and thermoplastic elastomer, which can not only reduce the friction between the shaft and the packing ring 300 and reduce the wear of the packing ring, but also can produce a certain deformation itself, so that the inner wall of the packing ring can be compensated by deformation after being worn. The first sealing ring can be made of materials such as rubber and elastomer, which can not only be compressed, but also have self-reset capability. When the sealing assembly is required to seal, the packing ring slides close to the limit ring, and the first sealing ring is compressed, which can not only make up for the sealing defect between the packing ring and the inner wall of the through hole, but also provide the force required for the inner wall of the packing ring to always abut against the shaft to deform, so that the packing ring and the shaft always maintain a sealed state, and the first sealing ring and the inner wall of the through hole are statically sealed. Through the packing ring and the first sealing ring, not only the sealing packing group has a self-compensation function, but also the friction of the shaft rotation is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.
[0026] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model before compression and sealing;
[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model after compression and sealing;
[0028] Figure 3 This is a schematic diagram of the cross-sectional structure of the main body of the utility model;
[0029] Figure 4 It is a schematic diagram of the cross-sectional structure of the packing ring of the utility model.
[0030] In the figure: 100, main body, 110, through hole, 111, limit ring, 200, shaft, 300, packing ring, 310, first section, 320, second section, 400, first sealing ring, 500, second sealing ring, 600, pressing member, 112, limit platform. DETAILED DESCRIPTION
[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.
[0032] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".
[0033] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0034] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0035] Reference Figure 1~Figure 4The utility model proposes a self-compensating sealing packing group, including a main body 100 with a through hole 110, and a limit ring 111 in the through hole 110; a shaft 200 is rotatably arranged in the through hole 110, and a gap is provided between the outer wall of the shaft 200 and the inner wall of the through hole 110; a packing ring 300 is sleeved on the shaft 200 and is located in the gap, and the packing ring 300 is slidably arranged relative to the shaft 200, and the sliding direction of the packing ring 300 is parallel to the axial direction of the shaft 200, and the packing ring 300 has a first section 310 and a second section 320, and the first section 310 and the second section 320 are parallel to each other. The inner diameters of the first section 310 and the second section 320 are the same, the outer diameter of the first section 310 is larger than the outer diameter of the second section 320, and the second section 320 is closer to the limiting ring 111 relative to the first section 310. The limiting ring 111 is used to limit the sliding distance of the packing ring 300; the first sealing ring 400 is sleeved on the shaft 200 and is located between the packing ring 300 and the limiting ring 111. After the packing ring 300 slides toward the limiting ring 111, the two ends of the first sealing ring 400 are respectively abutted against the packing ring 300 and the limiting ring 111, and the first sealing ring 400 provides a force for the inner wall of the second section 320 to abut against the shaft 200.
[0036] In this embodiment, the shaft 200 is rotatably arranged relative to the main body 100, and there is a gap between the outer wall of the shaft 200 and the inner wall of the through hole 110. The packing ring 300 is sleeved on the shaft 200. The shaft 200 is rotatably arranged relative to the packing ring 300. The inner wall and outer wall of the packing ring 300 are respectively abutted against the outer wall of the shaft 200 and the inner wall of the through hole 110. The packing ring 300 can slide relative to the shaft 200, and the packing ring 300 stops sliding when it slides until it abuts against the limit ring 111. The packing ring 300 is configured to be a first section 310 and a second section 320 with different outer diameters, and the outer diameter of the first section 310 is larger than the outer diameter of the second section 320. The outer wall of the first section 310 abuts against the inner wall of the through hole 110, and the second section 320 is closer to the limiting ring 111 than the first section 310. The space between the outer diameter difference between the first section 310 and the second section 320 is provided for the first sealing ring 400, so that when the packing ring 300 slides close to the limiting platform 112, the first sealing ring 400 can be compressed into the space generated by the outer diameter difference between the first section 310 and the second section 320.
[0037] The packing ring 300 can be made of materials such as plastic, nylon, and thermoplastic elastomer, which can not only reduce the friction between the shaft 200 and the packing ring 300, and reduce the wear of the packing ring 300, but also can produce a certain deformation itself, so that the inner wall of the packing ring 300 can be compensated by deformation after being worn. The first sealing ring 400 can be made of materials such as rubber and elastomer, which can not only be compressed, but also have self-reset capability. When the sealing assembly is required to seal, the packing ring 300 slides close to the limit ring 111, and the first sealing ring 400 is compressed, which can not only make up for the sealing defect between the packing ring 300 and the inner wall of the through hole 110, but also provide the force required for the inner wall of the packing ring 300 to always abut against the shaft 200 and deform, so that the packing ring 300 and the shaft 200 are always kept in a sealed state, and the first sealing ring 400 and the inner wall of the through hole 110 are statically sealed. The packing ring 300 and the first sealing ring 400 not only enable the sealing packing group to have a self-compensation function, but also reduce the friction force of the rotation of the shaft 200.
[0038] Furthermore, the packing ring 300 and the shaft member 200 are arranged to slide and rotate relative to each other.
[0039] In this embodiment, a dynamic seal is maintained between the packing ring 300 and the shaft member 200 , and the packing ring 300 is stationary relative to the first sealing ring 400 , which can reduce the wear of the first sealing ring 400 .
[0040] Furthermore, there are a plurality of packing rings 300, which are arranged in an array along the axis direction of the shaft member 200. The plurality of packing rings 300 are all slidably arranged relative to the shaft member 200, and the sliding directions are all parallel to the axis direction of the shaft member 200. After sliding, the plurality of packing rings 300 abut against each other or move away from each other. The invention also includes a plurality of second sealing rings 500, which are all sleeved on the shaft member 200. The plurality of second sealing rings 500 are spaced apart along the axis direction of the shaft member 200, and are respectively located between two adjacent packing rings 300. The two ends of the second sealing ring 500 abut against the first sections 310 of the two adjacent packing rings 300, respectively. After the two adjacent packing rings 300 approach each other, the second sealing ring 500 is compressed. The second sealing ring 500 is used to provide a force for the inner wall of the second section 320 to abut against the shaft member 200.
[0041] In this embodiment, there are a plurality of packing rings 300 distributed in an array along the axis direction of the shaft 200. The plurality of packing rings 300 abut against the shaft 200 and the inner wall of the through hole 110, which can improve the stability of the shaft 200 and is suitable for the situation of high-speed rotation of the shaft 200.
[0042] A plurality of second sealing rings 500 are respectively located between two adjacent packing rings 300. After the two adjacent packing rings 300 slide close to each other, the second sealing rings 500 are compressed, and the two ends of the second sealing rings 500 are respectively abutted against the bottom and the bottom of the top of the first section 310 of the two packing rings 300. After the second sealing ring 500 is compressed, it provides the force required to produce deformation so that the inner wall of the packing ring 300 is always abutted against the shaft 200, just like the first sealing ring 400.
[0043] Furthermore, the packing ring 300 is an L-shaped plastic packing ring 300 .
[0044] In this embodiment, the cross-sectional shape of the packing ring 300 is L-shaped. The packing ring 300 is made of plastic material, which not only has the characteristics of light weight, wear resistance and low friction, but also has the advantages of low cost and easy manufacturing.
[0045] Furthermore, the first sealing ring 400 and the second sealing ring 500 are both O-shaped rubber rings.
[0046] In this embodiment, the cross-sectional shapes of the first sealing ring 400 and the second sealing ring 500 are both O-shaped, the cost of rubber materials is relatively low, and the standardized production of O-rings makes their prices more economical.
[0047] Furthermore, the outer diameter of the second section 320 of the same packing ring 300 gradually decreases in a direction away from the first section 310 .
[0048] In this embodiment, the outer wall of the second section 320 of the packing ring 300 is an inclined surface, which abuts against the first sealing ring 400 or the second sealing ring 500. When the packing ring 300 slides and squeezes the first sealing ring 400 or the second sealing ring 500, the first sealing ring 400 or the second sealing ring 500 can be gradually subjected to the squeezing force toward the inner wall of the through hole 110, which can not only avoid the first sealing ring 400 or the second sealing ring 500 from being pressed between two adjacent packing rings 300 and causing damage, but also make the first sealing ring 400 or the second sealing ring 500 smoother when being compressed and deformed.
[0049] Furthermore, a clamping piece 600 is slidably disposed in the through hole 110, and a plurality of packing rings 300, a first sealing ring 400, and a second sealing ring 500 are all located between the clamping piece 600 and the limiting ring 111. After the clamping piece 600 slides, it approaches or moves away from the limiting ring 111, and the clamping piece 600 is used to press the packing ring 300 toward the limiting ring 111.
[0050] In this embodiment, the pressing piece 600 is slidably arranged in the through hole 110. The pressing piece 600 is used to press the packing ring 300 toward the limiting ring 111, so that the first sealing ring 400 and the second sealing ring 500 are compressed. The pressing piece 600 can compress the packing ring 300 through an external force. When the packing sealing group needs to be sealed, it is only necessary to press the pressing piece 600. The pressing piece 600 can be set in the form of a pressure ring or a pressure cover.
[0051] Furthermore, the outer wall of the first section 310 and the inner wall of the through hole 110 are sealed and slidable.
[0052] In this embodiment, the sealing sliding between the outer wall of the first section 310 and the through hole 110 can not only prevent external impurities from entering between the packing rings 300, but also enhance the sealing effect.
[0053] Furthermore, the outer wall of the shaft 200 abuts against the inner wall of the limiting ring 111 .
[0054] In this embodiment, the outer wall of the shaft 200 abuts against the inner wall of the limiting ring 111 , which not only facilitates the positioning of the shaft 200 during installation, but also contributes to the stability of the rotating shaft 200 .
[0055] Furthermore, the through hole 110 has a limiting platform 112 , and after the pressing member 600 slides close to the limiting ring 111 , the pressing member 600 abuts against the limiting platform 112 .
[0056] In this embodiment, when the pressing member 600 is pressed toward the limiting ring 111 , it will abut against the limiting platform 112 and stop sliding. The limiting platform 112 can prevent the pressing member 600 from being subjected to excessive pressing force and causing the packing ring 300 to be crushed.
[0057] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A self-compensating sealing packing group, characterized in that: include: The main body (100) has a through hole (110), and a limiting ring (111) is provided in the through hole (110); A shaft member (200) is rotatably disposed in the through hole (110), and a gap is provided between an outer wall of the shaft member (200) and an inner wall of the through hole (110); a packing ring (300) sleeved on the shaft (200) and located in the gap; the packing ring (300) is slidably arranged relative to the shaft (200); the sliding direction of the packing ring (300) is parallel to the axial direction of the shaft (200); the packing ring (300) comprises a first section (310) and a second section (320); the first section (310) and the second section (320) have the same inner diameter; the first section (310) and the second section (320) have an outer diameter greater than that of the second section (320); the second section (320) is closer to the limiting ring (111) than the first section (310); the limiting ring (111) is used to limit the sliding distance of the packing ring (300); The first sealing ring (400) is sleeved on the shaft (200) and is located between the packing ring (300) and the limiting ring (111). After the packing ring (300) slides toward the limiting ring (111), two ends of the first sealing ring (400) respectively abut against the packing ring (300) and the limiting ring (111), and the first sealing ring (400) provides a force for the inner wall of the second section (320) to abut against the shaft (200).
2. A self-compensating sealing packing assembly according to claim 1, characterized in that: The packing ring (300) and the shaft member (200) are arranged to slide relative to and rotate relative to each other.
3. A self-compensating sealing packing assembly according to claim 1, characterized in that: The packing rings (300) are provided in a plurality and arranged in an array along the axis direction of the shaft member (200); the plurality of packing rings (300) are all arranged to slide relative to the shaft member (200), and the sliding directions are all parallel to the axis direction of the shaft member (200); after sliding, the plurality of packing rings (300) abut against each other or move away from each other, and further comprising: There are a plurality of second sealing rings (500), all of which are sleeved on the shaft member (200). The plurality of second sealing rings (500) are spaced apart along the axial direction of the shaft member (200) and are respectively located between two adjacent packing rings (300). When the two adjacent packing rings (300) are brought close to each other, the second sealing rings (500) are compressed. The second sealing rings (500) are used to provide a force for the inner wall of the second section (320) to abut against the shaft member (200).
4. A self-compensating sealing packing assembly according to claim 1, characterized in that: The packing ring (300) is an L-shaped plastic packing ring (300).
5. A self-compensating sealing packing assembly according to claim 3, characterized in that: The first sealing ring (400) and the second sealing ring (500) are both O-shaped rubber rings.
6. A self-compensating sealing packing assembly according to claim 1, characterized in that: The outer diameter of the second section (320) of the same packing ring (300) gradually decreases in a direction away from the first section (310).
7. A self-compensating sealing packing assembly according to claim 3, characterized in that: Also includes: A pressing piece (600) is slidably disposed in the through hole (110); a plurality of the packing rings (300), the first sealing ring (400), and the second sealing ring (500) are all located between the pressing piece (600) and the limiting ring (111); the pressing piece (600) slides toward or away from the limiting ring (111); and the pressing piece (600) is used to press the packing ring (300) toward the limiting ring (111).
8. The self-compensating sealing packing assembly according to claim 1, characterized in that: The outer wall of the first section (310) and the inner wall of the through hole (110) are sealed and slidable.
9. The self-compensating sealing packing assembly according to claim 1, characterized in that: The outer wall of the shaft member (200) abuts against the inner wall of the limiting ring (111).
10. The self-compensating sealing packing assembly according to claim 7, characterized in that: The through hole (110) has a limiting platform (112), and after the pressing piece (600) slides close to the limiting ring (111), the pressing piece (600) abuts against the limiting platform (112).