A self-lubricating sealing ring for a rope threading hole, a sealing structure and method

Abstract

This invention relates to the field of sealing ring technology, and discloses a self-lubricating sealing ring with a rope hole, a sealing structure, and a method thereof. The ring includes a semi-circular structure ring, comprising a first semi-circular structure ring and a second semi-circular structure ring arranged opposite each other. The two ends of the first and second semi-circular structure rings are connected by a limiting connector, and the inner surfaces are provided with a self-lubricating metal-ceramic coating. The limiting connector provides guidance for the expansion of the semi-circular structure ring, and a reset element is provided on the limiting connector for the semi-circular structure ring to reset and close. The sealing ring of this invention has strong adaptability, adapting to both self-lubricating steel wire ropes and traditional grease-lubricated steel wire ropes. It can work in conjunction with a sealing ring to maintain a seal, exhibiting high reliability and excellent durability, meeting the requirements of long-term operation.

Description

Technical Field

[0001] This invention relates to the field of sealing ring technology, and in particular to a self-lubricating sealing ring for a rope hole, a sealing structure, and a method thereof. Background Technology

[0002] Fixed plate hole sealing is a widely used and technically mature bottom protection solution for wire ropes of winch-type gate hoists in water conservancy projects. This sealing solution initially solves the problem of sealing the rope hole, but because the working space is fixed, it is difficult to adapt to the dynamic swing generated during the operation of the wire rope, and cannot achieve a complete seal by tightly fitting with the wire rope.

[0003] In existing technologies, the space for the wire rope to swing is reserved by opening holes in the fixed plate. The openings in the fixed plate are generally reduced using long-bristled bristles or serrated rubber plates to minimize the gap between the opening and the wire rope. While these methods can reduce the gap, frequent friction with the wire rope can easily lead to poor sealing. Furthermore, the long-bristled bristles or serrated rubber plates are prone to aging and failure, requiring frequent maintenance. In addition, if the hoist uses old-fashioned grease to lubricate the wire rope, the grease on the surface easily attracts dust and forms grease buildup. During the up-and-down movement of the wire rope, sealing devices such as sealing rings can easily become stuck due to this grease buildup, thus affecting the normal operation of the hoist. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a self-lubricating sealing ring for the rope hole, a sealing structure and method, to solve the above problems.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, a self-lubricating sealing ring with a rope hole includes a semi-circular structural ring. The semi-circular structural ring includes a first semi-circular structural ring and a second semi-circular structural ring arranged opposite to each other. The two ends of the first semi-circular structural ring and the second semi-circular structural ring are connected by a limiting connector, and the inner surface is provided with a self-lubricating metal-ceramic coating. The limiting connector provides guidance for the expansion of the semi-circular structural ring, and the limiting connector is provided with a reset member for the semi-circular structural ring to reset and close.

[0006] As a further implementation, the first semicircular structural ring and the second semicircular structural ring are symmetrically divided by a complete circular ring, and connecting holes are machined on the cut side of the semicircular structural ring. The limiting connector connects the first semicircular structural ring and the second semicircular structural ring through the connecting hole.

[0007] As a further implementation, the connecting hole on the first semicircular structural ring is a threaded hole, and the connecting hole on the second semicircular structural ring is a through hole, with a stepped structure formed on the side of the through hole away from the threaded hole; The front end of the limiting connector passes through the through hole and is fixedly connected to the threaded hole. The rear end of the limiting connector is provided with a limiting end. The outer diameter of the end is larger than the outer diameter of the main body of the limiting connector. The end is used to abut against the stepped structure.

[0008] As a further implementation, the thickness of the first semicircular structural ring and the second semicircular structural ring is set by grinding or milling from the cut side. The reset component is an annular magnetic pad, which is sleeved on the limiting connector and sandwiched between the cut sides of the first semicircular structural ring and the second semicircular structural ring. The reset closure is achieved by magnetically attracting the semicircular structural ring.

[0009] As a further implementation, the reset component is an elastic component, which is sleeved on the limiting connector, with one end abutting against the outside of the stepped structure and the other end abutting against the end head.

[0010] As a further implementation, the main body of the limiting connector is a rod, and the rear end of the rod is provided with an end; The front section of the rod is configured as a threaded rod, and the rear section is configured as a smooth rod. The threaded rod is fitted with a threaded hole, and the smooth rod is fitted with a through hole.

[0011] As a further implementation, the self-lubricating metal-ceramic coating is formed on the inner side of the semi-circular structure ring using thermal spraying technology. The self-lubricating metal-ceramic coating is a metal-ceramic composite material Ti(C,N)-Ni-Mo-ZrO2-CaF2.

[0012] As a further implementation, in the Ti(C,N)-Ni-Mo-ZrO2-CaF2, from the inside out are the hard matrix phase Ti(C,N), the metal binder phases Ni and Mo, the toughening phase ZrO2, and the solid lubricating phase CaF2. The volume fractions are 55-75 vol for hard matrix phase, 10-15 vol for metallic binder phase, 5-10 vol for toughening phase, and 10-20 vol for solid lubricant phase.

[0013] Secondly, a rope hole sealing structure includes a sealing ring as described above, and also includes an opening base plate and a sealing ring. The perforated bottom plate is located near the hoist. The perforated bottom plate has a rope hole and a sealing ring inside the rope hole. The wire rope passes through the sealing ring and the sealing ring is located above the perforated bottom plate and is sleeved on the wire rope. In its natural state, it presses down on the rope hole.

[0014] Thirdly, the manufacturing method of any of the above-mentioned self-lubricating sealing rings for rope holes includes the following steps: A complete circular ring is symmetrically divided to form a first semicircular structural ring and a second semicircular structural ring, and the first semicircular structural ring and the second semicircular structural ring are ground or milled from the cut side to set the thickness. Threaded holes are machined on the cutting side of the first semicircular structural ring, and through holes are machined on the cut side of the second semicircular structural ring. A stepped structure is formed at the end of the through hole away from the cut side. A self-lubricating metal-ceramic coating, namely Ti(C,N)-Ni-Mo-ZrO2-CaF2, was formed on the inner side of the two semi-circular structural rings using thermal spraying technology. Customized limiting connectors, the main body of the limiting connectors is a rod, the front section of the rod is a threaded rod, the rear section is a smooth rod, the rear end of the rod is a hemispherical end, and the center of the end is a hexagonal groove. When installing the sealing ring, the semi-circular structure ring is mated to the circumference of the wire rope. The rod of the limiting connector first passes through the through hole, then the annular magnetic chuck is fitted, and then it is fixedly connected to the threaded hole.

[0015] The beneficial effects of the present invention are as follows: In its normally closed state, the sealing ring of this invention fills the gap between the steel wire rope and the sealing ring on the bottom plate with grease coating. When used in conjunction with the sealing ring on the bottom plate, it effectively prevents most dust and particulate matter from entering the rope hole, achieving a complete seal on the rope hole of the hoist. The inner side of the semi-circular ring is coated with a self-lubricating metal-ceramic coating, meeting the requirements for low friction and wear resistance between the steel wire rope and the sealing ring. The sealing ring of this invention is highly adaptable, suitable for both self-lubricating steel wire ropes and traditional grease-lubricated steel wire ropes. While providing protective sealing, it can also handle unexpected situations such as changes in rope diameter. When used with traditional grease-lubricated steel wire ropes, the ring passively opens and closes according to the change in rope diameter of the grease-coated steel wire rope. Furthermore, the ring can return to its original position after being lifted by its own weight, maintaining a seal in conjunction with the sealing ring. This provides high reliability and excellent durability, meeting long-term operational requirements. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0017] Figure 1 This is a schematic diagram of the overall structure of the self-lubricating sealing ring in an embodiment of the present invention; Figure 2 This is an exploded view of the self-lubricating sealing ring in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure after the self-lubricating sealing ring is installed in an embodiment of the present invention; Figure 4This is a schematic diagram of the state of the self-lubricating sealing ring after it has been lifted in an embodiment of the present invention; Figure 5 This is a structural disassembly diagram of the self-lubricating sealing ring after installation in an embodiment of the present invention.

[0018] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0019] Among them: 1. Semicircular structural ring, 2. Limiting connector, 3. Annular magnetic gasket, 4. Self-lubricating metal ceramic coating, 5. Sealing ring, 6. Perforated base plate, 61. Rope hole, 7. Steel wire rope; 11. First semicircular structural ring, 12. Second semicircular structural ring, 13. Inner side; 111. Threaded hole, 121. Through hole, 122. Countersunk hole; 21. Threaded rod, 22. Plain rod, 23. End. Detailed Implementation

[0020] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] Example 1 In a typical embodiment of the present invention, reference is made to Figures 1-5 As shown, a self-lubricating sealing ring with a rope hole includes a semi-circular ring 1. The semi-circular ring 1 includes a first semi-circular ring 11 and a second semi-circular ring 12 arranged opposite to each other. The two ends of the first semi-circular ring 11 and the second semi-circular ring 12 are connected by a limiting connector 2. The inner surface 13 of the semi-circular ring 1 is provided with a self-lubricating metal-ceramic coating 4. The limiting connector 2 provides a guiding function for the expansion of the semi-circular ring. The limiting connector 2 is provided with a reset member for the semi-circular ring 1 to reset and close.

[0022] The first semicircular structural ring 11 and the second semicircular structural ring 12 are symmetrically divided from a complete circular ring, and connecting holes are machined on the cut sides of the two semicircular structural rings (first semicircular structural ring 11 and second semicircular structural ring 12). When connecting the first semicircular structural ring 11 and the second semicircular structural ring 12, the limiting connector 2 connects the two semicircular structural rings 1 through the connecting holes. The two semicircular structural rings 1 are not completely fixedly connected by the limiting connector 2, but can be appropriately expanded under the guidance of the limiting connector 2.

[0023] like Figure 2As shown, the limiting connector 2 is preferably a limiting bolt. The main body of the limiting bolt is a rod, and the rear end of the rod is provided with an end. The rod is divided into a front section and a rear section from front to back. The front section of the rod is set as a threaded rod 21, and the rear section is set as a smooth rod 22. The smooth rod 22 is not threaded. The end 23 is integrally formed at the rear end of the smooth rod 22. The outer diameters of the threaded rod 21 and the smooth rod 22 are matched, and the outer diameter of the end 23 is larger than the outer diameter of the rod.

[0024] The end is a solid hemispherical structure with a groove at the center of the rear side. The groove is preferably hexagonal and is used to cooperate with a hexagonal wrench to install the limit bolt.

[0025] In this embodiment, the end 23 is used for limiting. The limiting connector 2 can provide guidance for the expansion of the two semi-circular structural rings 1, and the end 23 is used to limit the degree of expansion.

[0026] It is understandable that in order to achieve the docking of the first semicircular structural ring 11 and the second semicircular structural ring 12, connecting holes need to be machined on the two semicircular structural rings 1.

[0027] After the complete ring is symmetrically divided, the two ends of the first semicircular structural ring 11 and the second semicircular structural ring 12 are on the same plane, which is the plane where the cut side is located. Both ends of each semicircular structural ring form a cut side. When machining the connecting hole, machining starts from the position of the cut side, and the axis of the connecting hole is perpendicular to the cut side.

[0028] Specifically, two threaded holes 111 are formed on the two cut sides of the first semicircular structural ring 11 for mating with the threaded rod 21. The threaded holes 111 are through holes, with one end located on the cut side and the other end penetrating the outer arc-shaped surface of the first semicircular structural ring 11. The entire threaded hole does not need to be machined with internal threads; the internal threads can be arranged close to the cut side.

[0029] Two through holes 121 are formed on the two cut sides of the second semicircular structural ring 12, as shown in the figure. The connecting hole on the second semicircular structural ring 12 consists of a through hole 121 and a countersunk hole. The rear end of the through hole 121 is connected to the front end of the countersunk hole. The front end of the through hole 121 is located on the cut side of the second semicircular structural ring 12. The inner diameter of the countersunk hole is larger than the inner diameter of the through hole 121, so that the side of the through hole 121 on the second semicircular structural ring 12 away from the threaded hole forms a stepped structure with the front end of the countersunk hole. The end is used to abut against the stepped structure.

[0030] In this embodiment, the connecting hole on the first semicircular structural ring 11 is machined into a threaded hole 111, and the connecting hole on the second semicircular structural ring 12 is machined into a combination of a through hole 121 and a countersunk hole 122. The through hole 121 and the countersunk hole 122 are arranged coaxially, thereby forming a stepped structure.

[0031] When the first semicircular structural ring 11 and the second semicircular structural ring 12 are connected by two limiting connectors 2, the front ends of the two limiting connectors 2 pass through the through hole 121 and are fixedly connected to the threaded hole 111. The threaded rod passes through the countersunk hole 122 and the through hole 121 and is threadedly engaged with the threaded hole 111. The corresponding engagement of the smooth rod 22 is at the countersunk hole and the through hole 121. The outer diameter of the smooth rod 22 is slightly smaller than the inner diameter of the through hole 121.

[0032] After the limit bolt is installed in place, the step surface of the stepped structure and the front side of the end 23 have a set distance, so that the second semi-circular structure ring 12 can expand under the guidance of the rod. When it expands to the maximum extent, the step surface abuts against the end 23 and cannot expand further.

[0033] The limiting connector 2 is provided with a reset element for the semi-circular structural ring 1 to reset and close. In a preferred example, the reset element is an annular magnetic absorbing pad 3, which is sleeved on the limiting connector. The annular magnetic absorbing pad 3 is sandwiched between the cut sides of the first semi-circular structural ring 11 and the second semi-circular structural ring 12. The annular magnetic absorbing pad 3 is a circular ring structure that can magnetically attract the first semi-circular structural ring 11 and the second semi-circular structural ring 12. When the semi-circular structural rings expand and move away from each other, the semi-circular structural ring 1 is reset and closed by the magnetic attraction of the semi-circular structural rings by the annular magnetic absorbing pad 3.

[0034] Considering that the annular magnetic pad 3 has a set thickness and is located between the two ends of the two semicircular structural rings, before arranging the annular magnetic pad 3, it is necessary to grind or mill the first semicircular structural ring 11 and the second semicircular structural ring 12 from the cut side to set the thickness. This ensures that after the semicircular structural ring 1, the limiting bolt 2, and the annular magnetic pad 3 are installed, in their natural state, the inner surfaces of the two semicircular structural rings 1 are on the same annular surface. After the semicircular structural ring 1 is installed with the wire rope, the distance between the corresponding positions of the inner surfaces and the wire rope 7 is consistent.

[0035] It is understood that the structural ring with a set thickness that is ground or milled is a near-semi-circular structural ring. For ease of description, this embodiment ignores the grinding or milling part and refers to it as a semi-circular structural ring.

[0036] In another preferred example, no annular magnetic pad 3 is provided between the cut sides of the two semi-circular structural rings 1. The reset component is set as an elastic component, specifically a spring. The spring is sleeved on the rod of the limit bolt and is located at the countersunk hole. One end of the spring abuts against the outside of the stepped structure, and the other end abuts against the front side of the end.

[0037] When the reset element is set as a spring, the cut sides of the first semicircular structural ring 11 and the second semicircular structural ring 12 do not need to be ground or milled to set the thickness. When the first semicircular structural ring 11 and the second semicircular structural ring 12 expand relative to each other, the spring is compressed. After expansion, under the action of the spring, the two semicircular structural rings can be reset and closed, the cut sides of the two semicircular structural rings re-fit, and the self-lubricating sealing ring re-fits tightly against the wire rope.

[0038] To reduce the coefficient of friction between the self-lubricating sealing ring and the wire rope, the inner surfaces 13 of the two semi-circular rings 1 are provided with a self-lubricating metal-ceramic coating 4.

[0039] Specifically, the self-lubricating metal-ceramic coating 4 is formed on the inner side of the semi-circular structure ring using thermal spraying technology. The self-lubricating metal-ceramic coating 4 is a metal-ceramic composite material Ti(C,N)-Ni-Mo-ZrO2-CaF2.

[0040] In Ti(C,N)-Ni-Mo-ZrO2-CaF2, multiple layers are arranged from the inside out. From the inside out, they are the hard matrix phase Ti(C,N), the metal binder phases Ni and Mo (Ni and Mo in equal mass ratio of 1:1), the toughening phase ZrO2, and the solid lubricating phase CaF2. The volume fractions are 55-75 vol% for the hard matrix phase, 10-15 vol% for the metal binder phase, 5-10 vol% for the toughening phase, and 10-20 vol% for the solid lubricating phase.

[0041] The self-lubricating cermet coating 4 is inherently wear-resistant and has a low coefficient of friction (μ=0.15-0.25), exhibiting self-lubricating properties. Furthermore, the coating surface undergoes laser processing to create a microtexture. When used with grease-coated wire rope (old-style grease-lubricated wire rope), the surface microtexture can store trace amounts of grease, reducing the coefficient of friction and inhibiting wear. Because the wire rope undergoes both vertical and horizontal movement, it is constantly in a state of friction with the sealing ring during this motion. The self-lubricating cermet coating and its surface microtexture can significantly reduce the friction and wear between the sealing ring and the wire rope, extending its service life.

[0042] In this embodiment, a self-lubricating metal-ceramic coating 4 is prepared on the inner side of the two semi-circular structural rings 1 using thermal spraying technology, which can meet the requirements of low friction and wear resistance for the use of wire rope and sealing ring.

[0043] The two semi-circular rings 1, together with the annular magnetic gaskets 3 and the limiting bolts 2, not only achieve a full-circular encircling seal for the wire rope, but also provide passive opening and automatic closing and reset during the movement of the wire rope, thus meeting the requirements for the vertical and horizontal movement of the wire rope.

[0044] When the wire rope 7 carries a foreign object through the sealing ring, if the foreign object is loosely attached, the sealing ring can scrape it off from the wire rope; if the foreign object is firmly attached or is large in size, the sealing ring will open under force, and after the foreign object passes through, the sealing ring can automatically close and reset by magnetic force.

[0045] It is understood that the sealing ring in this embodiment needs to be used in conjunction with the perforated base plate 6. The perforated base plate 6 is provided with a rope hole 61 and a sealing ring 5 is provided inside the rope hole. The perforated base plate is located near the hoist. The perforated base plate is the prior art, namely the fixing plate in the background art.

[0046] The wire rope 7 passes through the sealing ring 5. The sealing ring is positioned above the perforated base plate 6 and is fitted onto the wire rope 7. In its natural state, it presses against the rope hole 61 and is coaxially arranged with the sealing ring 5. The sealing ring 5 has circumferential grooves, which engage with the inner surface of the rope hole 61. The sealing ring and the sealing ring 5 are coaxially arranged. In its natural state, the bottom surface of the sealing ring is in close contact with the top surface of the sealing ring 5, achieving a seal. The cooperation between the sealing ring and the sealing ring 5 prevents dust from rising and spreading above the perforated base plate.

[0047] In an optional example, with the sealing ring in its normally closed state, the inner diameter of the ring and the diameter of the mating wire rope are fitted with a clearance of 0.01-0.05 mm, which can effectively prevent most dust and particulate matter from entering.

[0048] In an optional example, for the selection of the complete ring size, the inner diameter is matched with the nominal diameter of the wire rope of 7 mm with a 2 mm gap, the outer diameter of the complete ring is 50-55 mm, and the thickness is 30-35 mm.

[0049] After the complete circular ring is symmetrically cut, 0.8-1.5 mm is removed from both ends of the two semi-circular ring structures from the cut side using milling or grinding processes to facilitate the formation of a complete circle with the annular magnetic absorbing pad. The thickness of the annular magnetic absorbing pad is 1.6-3.0 mm. Preferably, 1.0 mm is removed, and the thickness of the annular magnetic absorbing pad 3 is 2.0 mm.

[0050] The complete circular ring is made of 429 ferritic stainless steel (1Cr15, GB / T 20878-2007), which has corrosion resistance and meets the rust prevention requirements under on-site working conditions.

[0051] The thickness of the self-lubricating metal-ceramic coating 4 is preferably 1 mm, so that after the self-lubricating metal-ceramic coating 4 is formed on the inner side of the semi-circular structure ring 1, the inner diameter of the self-lubricating metal-ceramic coating 4 matches the outer diameter of the wire rope, thus meeting the sealing requirements.

[0052] The limit bolt is an improvement on the M6 ​​bolt, with a threaded rod length of 10mm and a smooth rod length of 20mm. The smooth rod is used to support the reciprocating motion of the semi-circular ring structure and provide guidance.

[0053] The dimensions of the threaded hole 111 and the through hole 121 correspond to the dimensions of the M6 ​​bolt, ensuring that the threaded rod and the threaded hole 111 are threadedly engaged, and the through hole 121 is slidably engaged with the smooth rod 22. In this embodiment, the limiting bolt is made of 304 austenitic stainless steel (06Cr19Ni10, GB / T 20878-2007), which meets the requirements of rust prevention for field use, is non-ferromagnetic, and only serves as a connection and limiting function, without affecting the movement of the semi-circular structural ring.

[0054] The magnetic force design of the annular magnetic pad 3 meets the design requirements of automatic closure and reset after the semi-circular structure ring expands to its maximum stroke. The magnetic force is designed to be 4-6N based on the ring mass and static vertical adsorption requirements, with 6N being preferred.

[0055] The outer diameter of the annular magnetic pad 3 is 12-13mm, and the inner diameter is 8-9mm, preferably 12mm and 8mm.

[0056] In this embodiment, the first semi-circular structural ring 11 and the second semi-circular structural ring 12 are connected by a limiting connector 2. The limiting connector can provide guidance for the expansion and repositioning of the semi-circular structural ring. When used with the repositioning component, when the wire rope 7 carries foreign objects through the sealing ring, if the foreign objects are loosely attached, the sealing ring can scrape them off the wire rope 7; if the foreign objects are firmly attached or are large in size, the sealing ring will open under force, and after the foreign objects pass through, the sealing ring can automatically close and reposition itself by magnetic force.

[0057] Example 2 This embodiment provides a rope-passing hole sealing structure, which includes the sealing ring of Embodiment 1, as well as an opening base plate 6 and a sealing ring 5. The opening base plate 6 is arranged near the hoist position, and has a rope-passing hole 61. A sealing ring 5 is provided inside the rope-passing hole 61. The wire rope 7 passes through the sealing ring 5. The sealing ring 5 is located above the opening base plate and is sleeved on the wire rope 7, pressing down on the rope-passing hole 61 in its natural state.

[0058] Specifically, the sealing ring 5 has an circumferential groove on its periphery, which engages with the inner surface of the rope hole. The sealing ring and sealing ring 5 are coaxially arranged; in their natural state, the bottom surface of the sealing ring is in close contact with the top surface of the sealing ring 5, achieving a seal. The sealing ring 5 is made of rubber. Due to its significant weight, if the ring is lifted by a foreign object, it can automatically fall back to its original position under gravity and work together with the sealing ring 5 to maintain the seal. The sealing ring 5 provides a buffer for the sealing ring's fall.

[0059] It is understood that any aspects not covered in this invention can be addressed using existing technologies.

[0060] When the sealing ring is in its normal closed state, the lubricating grease coated on the surface of the wire rope fills the gap, effectively preventing most dust and particulate matter from entering the rope hole, thus achieving a complete seal on the rope hole on the opening base plate of the hoist.

[0061] like Figures 3-5 The sealing ring in this embodiment has strong adaptability, suitable for both self-lubricating steel wire ropes and traditional grease-lubricated steel wire ropes. While providing protective sealing, it can also handle unexpected situations such as changes in rope diameter. When used with traditional grease-lubricated steel wire ropes, the ring passively opens and closes according to the change in rope diameter of the grease-coated wire rope. Furthermore, the ring can return to its original position after being lifted by its own weight, and works in conjunction with the sealing ring 5 to maintain a seal. This design exhibits high reliability and excellent durability, meeting long-term operational requirements.

[0062] Example 3 This embodiment provides a method for manufacturing the self-lubricating sealing ring for the rope hole in Embodiment 1, specifically including the following steps: For the fabrication of the semi-circular structure ring 1, a complete circular ring is symmetrically divided to form a first semi-circular structure ring and a second semi-circular structure ring. The first and second semi-circular structure rings need to be ground or milled from the cut side to set the thickness, so as to facilitate subsequent mating with the annular magnetic pad 3. Grinding is preferred for the semi-circular structure rings.

[0063] After grinding, threaded holes are machined on the cutting side of the first semicircular structural ring, and a combination of through holes and countersunk holes is machined on the cut side of the second semicircular structural ring. A stepped structure is formed between the through hole and the countersunk hole at the end away from the cut side.

[0064] A self-lubricating metal-ceramic coating, namely Ti(C,N)-Ni-Mo-ZrO2-CaF2, was formed on the inner side of the two semi-circular structural rings using thermal spraying technology. Customized limit connectors (limit bolts) are made of rods. The front section of the rod is threaded, and the rear section is smooth. The rear end of the rod has a hemispherical end with an internal hexagonal groove at the center for easy tightening with a wrench.

[0065] Fabricate the annular magnetic pad 3. It is understood that the corresponding structural dimensions and materials of the semi-circular ring 1, the limiting connector 2, the annular magnetic pad 3, and the self-lubricating metal-ceramic coating 4 can be selected with reference to the principles of Example 1.

[0066] When installing the sealing ring, the semi-circular ring is mated to the circumference of the wire rope. The rod of the limiting connector is first passed through the through hole, then the annular magnetic shim is fitted, and then the limiting bolt is tightened with a wrench to fix the threaded rod to the threaded hole.

[0067] In this embodiment, the preferred reset component is an annular magnetic pad 3. When the reset component is a spring, the spring is sleeved on the smooth rod, with one end abutting the stepped surface and the other end abutting the front side of the end.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A self-lubricating sealing ring for a rope threading hole, characterized in that, The device includes a semi-circular structural ring, which comprises a first semi-circular structural ring and a second semi-circular structural ring arranged opposite to each other. The two ends of the first and second semi-circular structural rings are connected by a limiting connector, and the inner surface is provided with a self-lubricating metal-ceramic coating. The limiting connector provides guidance for the expansion of the semi-circular structural ring, and the limiting connector is provided with a reset member for the semi-circular structural ring to reset and close.

2. The self-lubricating sealing ring for a rope threading hole according to claim 1, characterized in that, The first and second semicircular structural rings are symmetrically divided by a complete circular ring, and connecting holes are machined on the cut side of the semicircular structural rings. The limiting connector connects the first semicircular structural ring and the second semicircular structural ring through the connecting hole.

3. A self-lubricating sealing ring for a rope threading hole according to claim 2, characterized in that, The connecting hole on the first semi-circular structural ring is a threaded hole, and the connecting hole on the second semi-circular structural ring is a through hole. The through hole forms a stepped structure on the side away from the threaded hole. The front end of the limiting connector passes through the through hole and is fixedly connected to the threaded hole. The rear end of the limiting connector is provided with a limiting end. The outer diameter of the end is larger than the outer diameter of the main body of the limiting connector. The end is used to abut against the stepped structure.

4. The self-lubricating sealing ring for a rope hole according to claim 3, characterized in that, The first and second semi-circular structural rings are ground or milled from the cut side to set the thickness; The reset component is an annular magnetic pad, which is sleeved on the limiting connector and sandwiched between the cut sides of the first semicircular structural ring and the second semicircular structural ring. The reset closure is achieved by magnetically attracting the semicircular structural ring.

5. A self-lubricating sealing ring for a rope threading hole according to claim 3, characterized in that, The reset component is an elastic component, which is sleeved on the limiting connector, with one end abutting against the outside of the stepped structure and the other end abutting against the end head.

6. A self-lubricating sealing ring for a rope threading hole according to claim 4 or 5, characterized in that, The main body of the limiting connector is a rod, and the rear end of the rod is provided with an end; The front section of the rod is configured as a threaded rod, and the rear section is configured as a smooth rod. The threaded rod mates with a threaded hole, and the smooth rod mates with a through hole.

7. The self-lubricating sealing ring for a rope hole according to claim 1, characterized in that, The self-lubricating metal-ceramic coating is formed on the inner side of the semi-circular structure ring using thermal spraying technology. The self-lubricating metal-ceramic coating is a metal-ceramic composite material Ti(C,N)-Ni-Mo-ZrO2-CaF2.

8. A self-lubricating sealing ring for a rope threading hole according to claim 7, characterized in that, In the Ti(C,N)-Ni-Mo-ZrO2-CaF2, from the inside out, they are the hard matrix phase Ti(C,N), the metal binder phases Ni and Mo, the toughening phase ZrO2, and the solid lubricating phase CaF2. The volume fractions are 55-75 vol for hard matrix phase, 10-15 vol for metallic binder phase, 5-10 vol for toughening phase, and 10-20 vol for solid lubricant phase.

9. A rope-threading hole sealing structure, characterized in that, Including the sealing ring as described in any one of claims 1-8, and further including an open bottom plate and a sealing ring; The perforated bottom plate is located near the hoist. The perforated bottom plate has a rope hole, and a sealing ring is installed inside the rope hole. The wire rope passes through the sealing ring, and the sealing ring is located above the perforated bottom plate and is sleeved on the wire rope. In its natural state, it presses down on the rope hole.

10. A method for manufacturing a self-lubricating sealing ring for a rope threading hole according to any one of claims 1-4, characterized in that, Includes the following steps: A complete circular ring is symmetrically divided to form a first semicircular structural ring and a second semicircular structural ring, and the first semicircular structural ring and the second semicircular structural ring are ground or milled from the cut side to set the thickness. Threaded holes are machined on the cutting side of the first semicircular structural ring, and through holes are machined on the cut side of the second semicircular structural ring. A stepped structure is formed at the end of the through hole away from the cut side. A self-lubricating metal-ceramic coating, namely Ti(C,N)-Ni-Mo-ZrO2-CaF2, was formed on the inner side of the two semi-circular structural rings using thermal spraying technology. Customized limiting connectors, the main body of the limiting connectors is a rod, the front section of the rod is a threaded rod, the rear section is a smooth rod, the rear end of the rod is a hemispherical end, and the center of the end is a hexagonal groove. When installing the sealing ring, the semi-circular structure ring is mated to the circumference of the wire rope. The rod of the limiting connector first passes through the through hole, then the annular magnetic chuck is fitted, and then it is fixedly connected to the threaded hole.

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