Hydraulic pipeline for offshore wind power with a skeleton O-ring

Abstract

The present invention relates to the technical field of pipeline sealing, and particularly to a skeleton O-ring for a hydraulic pipeline of an offshore wind power generation, which can reduce the deformation and aging of the O-ring during use, extend the service life of the O-ring, reduce the leakage at the pipeline connection, thereby reducing the impact on the offshore wind power generation and enabling it to operate normally; it includes an O-ring surface layer, an O-ring bottom layer and an O-shaped skeleton. Two groups of annular grooves are respectively arranged on the surface of the O-ring bottom layer and the bottom of the O-ring surface layer, and multiple groups of limiting grooves are arranged on the inner walls of the two groups of annular grooves. The upper half region and the lower half region of the O-shaped skeleton are respectively located in the two groups of annular grooves, and multiple groups of limiting pieces are arranged in the edge region of the O-shaped skeleton. The multiple groups of limiting pieces are respectively located in the multiple groups of limiting grooves, and the O-shaped skeleton is clamped between the O-ring surface layer and the O-ring bottom layer.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline sealing, and particularly to an O-ring with a skeleton for a hydraulic pipeline of offshore wind power generation. Background Art

[0002] Offshore wind power generation is a common way of utilizing offshore energy. In an offshore wind power discovery system, pipelines are widely used for transporting various liquids to cooperate with the normal operation of offshore wind power generation. During the connection and installation of pipelines, O-rings are required to improve the sealing performance between the interconnected pipelines, making the pipeline joints have good water-stopping properties and reducing the leakage of the flowing liquid. Existing O-rings are generally elastic O-rings that are elastically clamped between the connected pipelines to improve the sealing performance. However, when the existing O-rings are in use, they are prone to deformation, resulting in leakage at the pipeline joints. Moreover, during long-term use, the O-rings are prone to aging, shortening their service life and also causing leakage problems at the pipeline joints, thus affecting the normal operation of offshore wind power generation. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides an O-ring with a skeleton for a hydraulic pipeline of offshore wind power generation that can reduce the deformation and aging of the O-ring during use, extend the service life of the O-ring, reduce the leakage at the pipeline joints, thereby reducing the impact on offshore wind power generation and enabling its normal operation.

[0004] An O-ring with a skeleton for a hydraulic pipeline of offshore wind power generation according to the present invention includes a sealing ring surface layer, a sealing ring bottom layer, and an O-shaped skeleton. Two sets of annular grooves are respectively provided on the surface of the sealing ring bottom layer and the bottom of the sealing ring surface layer, and multiple sets of limiting grooves are provided on the inner walls of the two sets of annular grooves. The upper half area and the lower half area of the O-shaped skeleton are respectively located in the two sets of annular grooves, and multiple sets of limiting pieces are provided on the edge area of the O-shaped skeleton. The multiple sets of limiting pieces are respectively located in the multiple sets of limiting grooves, and the O-shaped skeleton is clamped between the sealing ring surface layer and the sealing ring bottom layer.

[0005] Specifically, multiple sets of upper card slots and multiple sets of upper limiting protrusions are provided at the bottom of the sealing ring surface layer, and multiple sets of lower card slots and multiple sets of lower limiting protrusions are provided on the surface of the sealing ring bottom layer. The multiple sets of upper limiting protrusions and the multiple sets of lower limiting protrusions are respectively located in the multiple sets of upper card slots and the multiple sets of lower card slots.

[0006] Specifically, the O-shaped skeleton and the multiple sets of limiting pieces are both made of light steel material.

[0007] Specifically, the surface layer of the sealing ring, the bottom layer of the sealing ring, the upper limit protrusion and the lower limit protrusion are all formed by rubber production. The rubber is made by mixing and vulcanizing nitrile rubber, fluororubber, silicone rubber, carbon black, anti-aging agent, phenolic resin, DPC, accelerator, light calcium carbonate and low molecular weight polyethylene.

[0008] Specifically, the added mass parts of each component in the rubber are as follows:

[0009]

[0010] Specifically, the production process of the O-ring with a skeleton includes the following steps:

[0011] S1. Rubber mixing: Add each raw material into the mixer in turn, adjust the temperature and pressure in the mixer, and carry out mixing treatment on the rubber raw materials;

[0012] S2. Extrusion molding: Set the corresponding molds for the surface layer and the bottom layer of the sealing ring respectively, and extrude the mixed rubber into the molds of the surface layer and the bottom layer of the sealing ring respectively. After curing, the formed surface layer and the bottom layer of the sealing ring are obtained;

[0013] S3. O-ring skeleton stamping molding: Use light steel material as the raw material, and stamp the O-ring skeleton with a limiting piece to obtain the O-ring skeleton with a limiting piece;

[0014] S4. Assembly: Assemble the surface layer of the sealing ring, the bottom layer of the sealing ring and the O-ring skeleton with a limiting piece. Fill the O-ring skeleton with a limiting piece into two groups of annular grooves and multiple groups of limiting grooves, and insert multiple groups of upper limit protrusions and multiple groups of lower limit protrusions into multiple groups of upper clamping grooves and multiple groups of lower clamping grooves respectively to assemble the whole sealing ring;

[0015] S5. Vulcanization treatment: Preheat the assembled sealing ring and carry out vulcanization treatment. Under the action of DPC and accelerator, the molecules are cross-linked, and the surface layer and the bottom layer of the sealing ring are fixed in cooperation. Finally, the O-ring with a skeleton is obtained.

[0016] Specifically, the mixing temperature of the rubber raw materials is 45 - 62 °C, and the mixing time is 18 - 23 min.

[0017] Specifically, when assembling the surface layer and the bottom layer of the sealing ring, a small amount of the mixed rubber material is coated between them.

[0018] Specifically, the preheating temperature of the sealing ring is 50 °C ± 2 °C, so that multiple groups of upper limit protrusions and multiple groups of lower limit protrusions are melted and matched with multiple groups of upper clamping grooves and multiple groups of lower clamping grooves.

[0019] The beneficial effects of the present invention compared with the prior art are as follows: The sealing ring of the present invention fixes the surface layer and the bottom layer of the sealing ring together by hot melting through the cooperation of multiple groups of upper and lower limiting protrusions. The three are closely combined and do not separate. The O-shaped light steel skeleton is integrated inside the sealing ring. The rigidity of the sealing ring is improved through the O-shaped light steel skeleton, reducing the deformation of the sealing ring during use. The sealing ring of the present invention adds nitrile rubber, fluororubber, silicone rubber, carbon black, antioxidant, phenolic resin, DPC, accelerator, light calcium carbonate and low molecular weight polyethylene. The various components synergistically enhance the toughness and anti-aging performance of the sealing ring, thereby effectively reducing the deformation and aging of the sealing ring during use, prolonging the service life of the sealing ring, reducing the leakage at the pipe connection, thereby reducing the impact on offshore wind power generation and enabling it to operate normally. The O-shaped sealing ring with a skeleton produced by the present invention is used at the connection of the hydraulic pipeline of the offshore wind power generation system for pipeline sealing. During long-term use, there is no leakage, and it does not age during use, eliminating the need to replace the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the O-shaped sealing ring with a skeleton of the present invention;

[0021] Figure 2 is an exploded structural diagram of the present invention;

[0022] Figure 3 is a front view of the exploded structure of the present invention;

[0023] Figure 4 is a structural diagram of the bottom of the sealing surface layer;

[0024] Reference numerals in the drawings: 1, sealing ring surface layer; 2, sealing ring bottom layer; 3, O-shaped skeleton; 4, annular groove; 5, limiting groove; 6, limiting piece; 7, upper card slot; 8, upper limiting protrusion; 9, lower card slot; 10, lower limiting protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following combines the embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0026] Embodiment 1

[0027] An offshore wind power hydraulic pipeline with a skeleton O-ring, including a sealing ring surface layer 1, a sealing ring bottom layer 2 and an O-shaped skeleton 3. Two groups of annular grooves 4 are respectively arranged on the surface of the sealing ring bottom layer 2 and the bottom of the sealing ring surface layer 1, and multiple groups of limiting grooves 5 are arranged on the inner walls of the two groups of annular grooves 4. The upper half area and the lower half area of the O-shaped skeleton 3 are respectively located in the two groups of annular grooves 4, and multiple groups of limiting pieces 6 are arranged in the edge area of the O-shaped skeleton 3. The multiple groups of limiting pieces 6 are respectively located in the multiple groups of limiting grooves 5. The O-shaped skeleton 3 is clamped between the sealing ring surface layer 1 and the sealing ring bottom layer 2. Multiple groups of upper clamping grooves 7 and multiple groups of upper limiting protrusions 8 are arranged at the bottom of the sealing ring surface layer 1. Multiple groups of lower clamping grooves 9 and multiple groups of lower limiting protrusions 10 are arranged on the surface of the sealing ring bottom layer 2. The multiple groups of upper limiting protrusions 8 and the multiple groups of lower limiting protrusions 10 are respectively located in the multiple groups of upper clamping grooves 7 and the multiple groups of lower clamping grooves 9. The O-shaped skeleton 3 and the multiple groups of limiting pieces 6 are both made of light steel material.

[0028] The sealing ring surface layer, the sealing ring bottom layer, the upper limiting protrusion and the lower limiting protrusion are all formed by rubber production. The rubber is made by mixing and vulcanizing nitrile rubber, fluororubber, silicone rubber, carbon black, anti-aging agent, phenolic resin, DPC, accelerator, light calcium carbonate and low molecular weight polyethylene. The added mass fractions of each component are as follows:

[0029]

[0030] The production process of the O-ring with a skeleton includes the following steps:

[0031] S1. Rubber mixing: Add each raw material into the mixer in turn, adjust the temperature and pressure in the mixer, and carry out mixing treatment on the rubber raw materials. The mixing temperature of the rubber raw materials is 45 - 62 °C, and the mixing time is 18 - 23 min;

[0032] S2. Extrusion molding: Set the corresponding molds for the sealing ring surface layer and the sealing ring bottom layer respectively, and extrude the mixed rubber into the molds of the sealing ring surface layer and the sealing ring bottom layer respectively. After curing, the formed sealing ring surface layer and the sealing ring bottom layer are obtained;

[0033] S3. Stamping molding of the O-shaped skeleton: Use light steel material as the raw material, and stamp the O-shaped skeleton with limiting pieces to obtain the O-shaped skeleton with limiting pieces;

[0034] S4. Assembly: Assemble the sealing ring surface layer, the sealing ring bottom layer and the O-shaped skeleton with limiting pieces. Fill the O-shaped skeleton with limiting pieces into the two groups of annular grooves and multiple groups of limiting grooves, and insert the multiple groups of upper limiting protrusions and the multiple groups of lower limiting protrusions into the multiple groups of upper clamping grooves and the multiple groups of lower clamping grooves respectively to assemble the whole sealing ring. When assembling the sealing ring surface layer and the sealing ring bottom layer, a small amount of the mixed rubber material is coated between the two;

[0035] S5. Vulcanization treatment: Preheat the assembled and formed sealing ring at a preheating temperature of 50°C ± 2°C, so that multiple groups of upper limit protrusions and multiple groups of lower limit protrusions are melt-fitted with multiple groups of upper card slots and multiple groups of lower card slots, and carry out vulcanization treatment. Under the action of DPC and accelerator therein, the molecules are cross-linked, and the surface layer and the bottom layer of the sealing ring are fixed in cooperation, and finally an O-ring with a skeleton is obtained.

[0036] The O-ring with a skeleton produced in this embodiment is used at the connection of the hydraulic pipeline of the offshore wind power generation system for pipeline sealing. During the pipeline connection process, the probability of deformation is greatly reduced, and the deformation situation will not occur in more than 99.5%. And during the long-term use process, there is no leakage situation, and it does not age during the use process, and there is no need to replace the sealing ring, extending the service life by 5 - 10 years.

[0037] Embodiment 2

[0038] An O-ring with a skeleton for the hydraulic pipeline of offshore wind power generation includes a sealing ring surface layer 1, a sealing ring bottom layer 2 and an O-ring skeleton 3. Two groups of annular grooves 4 are respectively arranged on the surface of the sealing ring bottom layer 2 and the bottom of the sealing ring surface layer 1, and multiple groups of limiting grooves 5 are arranged on the inner walls of the two groups of annular grooves 4. The upper half area and the lower half area of the O-ring skeleton 3 are respectively located in the two groups of annular grooves 4, and multiple groups of limiting pieces 6 are arranged in the edge area of the O-ring skeleton 3. The multiple groups of limiting pieces 6 are respectively located in the multiple groups of limiting grooves 5. The O-ring skeleton 3 is clamped between the sealing ring surface layer 1 and the sealing ring bottom layer 2. Multiple groups of upper card slots 7 and multiple groups of upper limit protrusions 8 are arranged at the bottom of the sealing ring surface layer 1. Multiple groups of lower card slots 9 and multiple groups of lower limit protrusions 10 are arranged on the surface of the sealing ring bottom layer 2. The multiple groups of upper limit protrusions 8 and the multiple groups of lower limit protrusions 10 are respectively located in the multiple groups of upper card slots 7 and the multiple groups of lower card slots 9. The O-ring skeleton 3 and the multiple groups of limiting pieces 6 are both made of light steel material.

[0039] The sealing ring surface layer, the sealing ring bottom layer, the upper limit protrusion and the lower limit protrusion are all formed by rubber production. The rubber is made by mixing and vulcanizing nitrile rubber, fluororubber, silicone rubber, carbon black, antioxidant, phenolic resin, DPC, accelerator, light calcium carbonate and low molecular weight polyethylene. The added mass fractions of each component are as follows:

[0040]

[0041]

[0042] The production process of the O-ring with a skeleton includes the following steps:

[0043] S1. Rubber Banburying: Add each raw material into a Banbury mixer in sequence, adjust the temperature and pressure in the Banbury mixer, and conduct Banburying treatment on the rubber raw material. The Banburying temperature of the rubber raw material is 45 - 62 °C, and the Banburying time is 18 - 23 min;

[0044] S2. Extrusion Molding: Set the corresponding molds for the surface layer and bottom layer of the sealing ring respectively, and extrude the Banburyed rubber into the molds for the surface layer and bottom layer of the sealing ring respectively. After curing, the formed surface layer and bottom layer of the sealing ring are obtained;

[0045] S3. O - shaped Frame Stamping: Use light steel material as the raw material, and stamp the O - shaped frame with a limiting piece to form the O - shaped frame with a limiting piece;

[0046] S4. Assembly: Assemble the surface layer of the sealing ring, the bottom layer of the sealing ring and the O - shaped frame with a limiting piece. Fill the O - shaped frame with a limiting piece into two groups of annular grooves and multiple groups of limiting grooves, and insert multiple groups of upper limiting protrusions and multiple groups of lower limiting protrusions into multiple groups of upper clamping grooves and multiple groups of lower clamping grooves respectively to assemble the whole sealing ring. When assembling the surface layer and the bottom layer of the sealing ring, a small amount of Banburyed rubber material is coated between them;

[0047] S5. Vulcanization Treatment: Pre - heat the assembled sealing ring, and the pre - heating temperature is 50 °C ± 2 °C, so that multiple groups of upper limiting protrusions and multiple groups of lower limiting protrusions are melt - fitted with multiple groups of upper clamping grooves and multiple groups of lower clamping grooves, and conduct vulcanization treatment. Under the action of DPC and accelerator, the molecules are cross - linked, and the surface layer and bottom layer of the sealing ring are fixed in cooperation. Finally, the O - shaped sealing ring with a frame is obtained.

[0048] The O - shaped sealing ring with a frame produced in this embodiment is used at the connection of the hydraulic pipeline of the offshore wind power generation system for pipeline sealing. During the pipeline connection process, the probability of deformation is greatly reduced, and the deformation situation will not occur in more than 99.5%. And during the long - term use process, there is no leakage situation, and it does not age during use, so there is no need to replace the sealing ring, and the service life is extended by 5 - 10 years.

[0049] Example 3

[0050] An offshore wind power hydraulic pipeline O-ring with a skeleton, comprising a sealing ring surface layer 1, a sealing ring bottom layer 2 and an O-shaped skeleton 3. Two sets of annular grooves 4 are respectively arranged on the surface of the sealing ring bottom layer 2 and the bottom of the sealing ring surface layer 1, and multiple sets of limiting grooves 5 are arranged on the inner walls of the two sets of annular grooves 4. The upper half area and the lower half area of the O-shaped skeleton 3 are respectively located in the two sets of annular grooves 4, and multiple sets of limiting pieces 6 are arranged in the edge area of the O-shaped skeleton 3. The multiple sets of limiting pieces 6 are respectively located in the multiple sets of limiting grooves 5. The O-shaped skeleton 3 is clamped between the sealing ring surface layer 1 and the sealing ring bottom layer 2. Multiple sets of upper clamping grooves 7 and multiple sets of upper limiting protrusions 8 are arranged at the bottom of the sealing ring surface layer 1. Multiple sets of lower clamping grooves 9 and multiple sets of lower limiting protrusions 10 are arranged on the surface of the sealing ring bottom layer 2. The multiple sets of upper limiting protrusions 8 and the multiple sets of lower limiting protrusions 10 are respectively located in the multiple sets of upper clamping grooves 7 and the multiple sets of lower clamping grooves 9. The O-shaped skeleton 3 and the multiple sets of limiting pieces 6 are both made of light steel material.

[0051] The sealing ring surface layer, the sealing ring bottom layer, the upper limiting protrusion and the lower limiting protrusion are all formed by rubber production. The rubber is made by mixing and vulcanizing nitrile rubber, fluororubber, silicone rubber, carbon black, antioxidant, phenolic resin, DPC, accelerator, light calcium carbonate and low molecular weight polyethylene. The added mass fractions of each component are as follows:

[0052]

[0053]

[0054] The production process of the O-ring with a skeleton includes the following steps:

[0055] S1. Rubber internal mixing: Add each raw material into an internal mixer in sequence, adjust the temperature and pressure in the internal mixer, and conduct internal mixing treatment on the rubber raw materials. The internal mixing temperature of the rubber raw materials is 45 - 62 °C, and the internal mixing time is 18 - 23 min;

[0056] S2. Extrusion molding: Set the corresponding molds for the sealing ring surface layer and the sealing ring bottom layer respectively, and extrude the internally mixed rubber into the molds of the sealing ring surface layer and the sealing ring bottom layer respectively. After curing, the formed sealing ring surface layer and the sealing ring bottom layer are obtained;

[0057] S3. Stamping molding of the O-shaped skeleton: Use light steel material as the raw material, and stamp the O-shaped skeleton with limiting pieces to obtain the O-shaped skeleton with limiting pieces;

[0058] S4. Assembly: Assemble the surface layer of the sealing ring, the bottom layer of the sealing ring, and the O-shaped skeleton with a limiting piece. Fill the O-shaped skeleton with a limiting piece into two sets of annular grooves and multiple sets of limiting grooves, and insert multiple sets of upper limiting protrusions and multiple sets of lower limiting protrusions into multiple sets of upper clamping grooves and multiple sets of lower clamping grooves respectively to form the assembled sealing ring. When assembling the surface layer of the sealing ring and the bottom layer of the sealing ring, a small amount of rubber material after mixing and kneading is coated between the two;

[0059] S5. Vulcanization treatment: Preheat the assembled sealing ring, and the preheating temperature is 50°C ± 2°C, so that multiple sets of upper limiting protrusions and multiple sets of lower limiting protrusions are melt-fitted with multiple sets of upper clamping grooves and multiple sets of lower clamping grooves, and then carry out vulcanization treatment. Under the action of DPC and accelerator therein, the molecules are cross-linked, and the surface layer and the bottom layer of the sealing ring are fixed in cooperation, and finally an O-shaped sealing ring with a skeleton is obtained.

[0060] The O-shaped sealing ring with a skeleton produced in this embodiment is used at the connection of the hydraulic pipeline of the offshore wind power generation system for pipeline sealing. During the pipeline connection process, the probability of deformation is greatly reduced, and the deformation situation will not occur in more than 99.5%. And during the long-term use process, there is no leakage situation, and it does not age during the use process, so there is no need to replace the sealing ring, and the service life is extended by 5 - 10 years.

[0061] Example 4

[0062] An O-shaped sealing ring with a skeleton for the hydraulic pipeline of offshore wind power generation includes a surface layer 1 of the sealing ring, a bottom layer 2 of the sealing ring, and an O-shaped skeleton 3. Two sets of annular grooves 4 are respectively arranged on the surface of the bottom layer 2 of the sealing ring and the bottom of the surface layer 1 of the sealing ring, and multiple sets of limiting grooves 5 are arranged on the inner walls of the two sets of annular grooves 4. The upper half area and the lower half area of the O-shaped skeleton 3 are respectively located in the two sets of annular grooves 4, and multiple sets of limiting pieces 6 are arranged in the edge area of the O-shaped skeleton 3. The multiple sets of limiting pieces 6 are respectively located in the multiple sets of limiting grooves 5. The O-shaped skeleton 3 is clamped between the surface layer 1 of the sealing ring and the bottom layer 2 of the sealing ring. Multiple sets of upper clamping grooves 7 and multiple sets of upper limiting protrusions 8 are arranged at the bottom of the surface layer 1 of the sealing ring. Multiple sets of lower clamping grooves 9 and multiple sets of lower limiting protrusions 10 are arranged on the surface of the bottom layer 2 of the sealing ring. The multiple sets of upper limiting protrusions 8 and the multiple sets of lower limiting protrusions 10 are respectively located in the multiple sets of upper clamping grooves 7 and the multiple sets of lower clamping grooves 9. The materials of the O-shaped skeleton 3 and the multiple sets of limiting pieces 6 are both light steel materials.

[0063] The surface layer of the sealing ring, the bottom layer of the sealing ring, the upper limiting protrusion, and the lower limiting protrusion are all formed by rubber production. The rubber is made by mixing and vulcanizing nitrile rubber, fluororubber, silicone rubber, carbon black, anti-aging agent, phenolic resin, DPC, accelerator, light calcium carbonate, and low molecular weight polyethylene. The added mass fractions of each component are as follows:

[0064]

[0065] The production process of the O-ring with a skeleton includes the following steps:

[0066] S1. Rubber mixing: Add each raw material into a mixer in sequence, adjust the temperature and pressure in the mixer, and perform mixing treatment on the rubber raw material. The mixing temperature of the rubber raw material is 45 - 62 °C, and the mixing time is 18 - 23 min;

[0067] S2. Extrusion molding: Set the corresponding molds for the surface layer and the bottom layer of the O-ring respectively, and extrude the mixed rubber into the molds for the surface layer and the bottom layer of the O-ring respectively. After curing, the formed surface layer and bottom layer of the O-ring are obtained;

[0068] S3. Stamping molding of the O-ring skeleton: Use light steel material as the raw material, and stamp the O-ring skeleton with a limit piece to obtain the O-ring skeleton with a limit piece;

[0069] S4. Assembly: Assemble the surface layer of the O-ring, the bottom layer of the O-ring, and the O-ring skeleton with a limit piece. Fill the O-ring skeleton with a limit piece into two groups of annular grooves and multiple groups of limit grooves, and insert multiple groups of upper limit protrusions and multiple groups of lower limit protrusions into multiple groups of upper clamping grooves and multiple groups of lower clamping grooves respectively to assemble the whole O-ring. When assembling the surface layer and the bottom layer of the O-ring, apply a small amount of the mixed rubber material between them;

[0070] S5. Vulcanization treatment: Preheat the assembled O-ring. The preheating temperature is 50 °C ± 2 °C, so that multiple groups of upper limit protrusions and multiple groups of lower limit protrusions are melt-fitted with multiple groups of upper clamping grooves and multiple groups of lower clamping grooves, and perform vulcanization treatment. Under the action of DPC and accelerator in it, the molecules are cross-linked, and the surface layer and the bottom layer of the O-ring are fixed in cooperation. Finally, the O-ring with a skeleton is obtained.

[0071] The O-ring with a skeleton produced in this embodiment is used at the connection of the hydraulic pipeline of an offshore wind power generation system for pipeline sealing. During the pipeline connection process, the probability of deformation is greatly reduced, and the deformation situation will not occur in more than 99.5% of cases. And during the long-term use process, there is no leakage situation, and it does not age during the use process, so there is no need to replace the O-ring, and the service life is extended by 5 - 10 years.

[0072] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An O-ring seal with a skeleton for a hydraulic pipeline of an offshore wind power generation, characterized in that, It includes a sealing ring surface layer (1), a sealing ring bottom layer (2) and an O-shaped skeleton (3). Two groups of annular grooves (4) are respectively arranged on the surface of the sealing ring bottom layer (2) and the bottom of the sealing ring surface layer (1), and multiple groups of limiting grooves (5) are arranged on the inner walls of the two groups of annular grooves (4). The upper half area and the lower half area of the O-shaped skeleton (3) are respectively located in the two groups of annular grooves (4), and multiple groups of limiting pieces (6) are arranged in the edge area of the O-shaped skeleton (3). The multiple groups of limiting pieces (6) are respectively located in the multiple groups of limiting grooves (5). The O-shaped skeleton (3) is clamped between the sealing ring surface layer (1) and the sealing ring bottom layer (2); Multiple groups of upper clamping grooves (7) and multiple groups of upper limiting protrusions (8) are arranged at the bottom of the sealing ring surface layer (1). Multiple groups of lower clamping grooves (9) and multiple groups of lower limiting protrusions (10) are arranged on the surface of the sealing ring bottom layer (2). The multiple groups of upper limiting protrusions (8) and the multiple groups of lower limiting protrusions (10) are respectively located in the multiple groups of upper clamping grooves (7) and the multiple groups of lower clamping grooves (9); The O-shaped skeleton and the multiple groups of limiting pieces are both made of light steel material; The sealing ring surface layer, the sealing ring bottom layer, the upper limiting protrusion and the lower limiting protrusion are all formed by rubber production. The rubber is made by mixing and vulcanizing nitrile rubber, fluororubber, silicone rubber, carbon black, anti-aging agent, phenolic resin, DPC, accelerator, light calcium carbonate and low molecular weight polyethylene; The added mass fractions of each component in the rubber are as follows: Nitrile rubber: 40 - 50 parts; Fluororubber: 15 - 20 parts; Silicone rubber: 5 - 8 parts; Carbon black: 30 - 50 parts; Anti-aging agent: 0.5 - 1.2 parts; Phenolic resin: 3 - 6 parts; DPC: 10 - 12 parts; Accelerator: 0.5 - 1 part; Light calcium carbonate: 6 - 9 parts; Low molecular weight polyethylene: 2 - 4 parts; The production process of this sealing ring includes the following steps: S1. Rubber internal mixing: Add each raw material into an internal mixer in sequence, adjust the temperature and pressure in the internal mixer, and conduct internal mixing treatment on the rubber raw materials; S2. Extrusion molding: Set the corresponding molds for the sealing ring surface layer and the sealing ring bottom layer respectively, and extrude the internally mixed rubber into the molds of the sealing ring surface layer and the sealing ring bottom layer respectively. After curing, the formed sealing ring surface layer and the sealing ring bottom layer are obtained; S3. O-shaped skeleton stamping molding: Use light steel material as the raw material, and stamp the O-shaped skeleton with limiting pieces to obtain the O-shaped skeleton with limiting pieces; S4. Assembly: Assemble the sealing ring surface layer, the sealing ring bottom layer and the O-shaped skeleton with limiting pieces. Fill the O-shaped skeleton with limiting pieces into the two groups of annular grooves and multiple groups of limiting grooves, and insert the multiple groups of upper limiting protrusions and the multiple groups of lower limiting protrusions into the multiple groups of upper clamping grooves and the multiple groups of lower clamping grooves respectively to assemble the whole sealing ring; S5. Vulcanization treatment: Pre-heat the assembled sealing ring and conduct vulcanization treatment. Under the action of DPC and the accelerator, the molecules are cross-linked, and the sealing ring surface layer and the sealing ring bottom layer are cooperatively fixed. Finally, the O-shaped sealing ring with a skeleton is obtained; The internal mixing temperature of the rubber raw materials is 45 - 62 °C, and the internal mixing time is 18 - 23 min; When the surface layer and the bottom layer of the sealing ring are assembled, a small amount of rubber material after mixing is coated between the two; The preheating temperature of the sealing ring is 50°C ± 2°C, so that multiple groups of upper limit protrusions and multiple groups of lower limit protrusions are melted and fitted with multiple groups of upper card slots and multiple groups of lower card slots.

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