Long glass fiber reinforced rubber skeleton multi-lip type sealing ring structure

Abstract

The invention discloses a long glass fiber reinforced rubber framework multi-lip type sealing ring structure which comprises a supporting framework, main sealing waist portions and an auxiliary sealing waist portion, the supporting framework is fixed to a sealing base through a pressing plate, and at least two main sealing waist portions and one auxiliary sealing waist portion are arranged below the supporting framework. A main sealing lip is arranged below the main sealing waist part, an auxiliary sealing lip is arranged below the auxiliary sealing waist part, the oblique opening directions of the main sealing lip and the auxiliary sealing lip are opposite, the main sealing lip and the auxiliary sealing lip are both in interference fit with a rotating shaft, and the bending directions of the main sealing waist part and the auxiliary sealing waist part after sealing are opposite. The sealing effect and the dustproof effect needed by lubrication of the wind power main bearing head can be effectively achieved, and meanwhile the effects that the framework structure is good in flexibility and stable in size are achieved.

Description

Technical Field

[0001] The invention relates to a long glass fiber reinforced rubber skeleton multi-lip type sealing ring structure, belonging to the field of bearing sealing. Background Art

[0002] Wind energy, a clean, pollution-free, renewable energy source, has attracted global attention. Global new energy strategies prioritize the development of wind power as a renewable energy source. Wind turbines are essential for converting wind energy into electricity. The lifespan of wind turbine main shaft bearings directly determines the turbine's service life. To more efficiently convert wind energy into electricity, innovations are constantly being made in the mounting and lubrication methods of wind turbine bearings. Previously, independent bearing housings were primarily mounted on the machine base, and the bearings were lubricated with grease. In recent years, the wind turbine main shaft, main shaft bearings, and gearbox have been integrated into a single unit, with oil lubrication being adopted for the bearings. While oil lubrication offers more advantages than grease lubrication, it also places higher demands on the main bearing seals. Traditional main bearing seals typically utilize a single lip with an interference fit on the shaft, creating a seal that effectively seals high-viscosity greases. However, sealing low-viscosity oils can lead to seal failure and oil leakage. Therefore, a main bearing seal structure suitable for oil lubrication is needed to ensure long-term, stable operation of wind turbines. Summary of the Invention

[0003] The purpose of the present invention is to provide a long glass fiber reinforced rubber skeleton multi-lip seal ring structure, which can effectively play the sealing effect and dustproof effect required for the lubrication of the wind turbine main bearing head, and at the same time has the effects of good skeleton structure flexibility and dimensional stability.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a long glass fiber reinforced rubber skeleton multi-lip sealing ring structure, which includes a supporting skeleton, a main sealing waist and a secondary sealing waist. The supporting skeleton is fixed to the sealing seat by a pressure plate, and at least two main sealing waists and one secondary sealing waist are arranged below the supporting skeleton. A main sealing lip is provided below the main sealing waist, and a secondary sealing lip is provided below the secondary sealing waist. The oblique directions of the main sealing lip and the secondary sealing lip are opposite, and the main sealing lip and the secondary sealing lip are both interference fit with the rotating shaft. The bending directions of the main sealing waist and the secondary sealing waist after sealing are opposite.

[0005] Furthermore, the support frame includes a rubber frame, reinforced glass fiber and frame chamfers, which are used to fix and support the sealing ring; the interior of the rubber frame is reinforced with reinforced glass fiber.

[0006] Furthermore, the rubber skeleton, the sealing waist, the main sealing lip and the secondary sealing lip are made of the same flexible rubber material.

[0007] Furthermore, the upper end of the main rubber waist is connected to the rubber frame, and an inward concave angle is provided at the connection between the main rubber waist and the rubber frame.

[0008] Furthermore, the upper end of the secondary sealing waist is connected to the rubber frame, and an outward concave angle is provided at the connection between the secondary sealing waist and the rubber frame.

[0009] Furthermore, there are five main sealing waist parts in total, and the five main sealing waist parts are arranged in parallel at intervals to form a multi-layer sealing structure.

[0010] Furthermore, the main sealing lip is interference fit with the rotating shaft and forms a multi-layer sealing space with the mounting groove for sealing lubricating oil; the secondary sealing lip is interference fit with the rotating shaft for preventing dust and water.

[0011] Furthermore, the secondary sealing waist and the adjacent primary sealing waist form an "eight"-shaped structure after installation, wherein the secondary sealing waist bends outwards and the primary sealing waist bends inwards.

[0012] Furthermore, the sealing seat is provided with a sealing installation groove and a sealing threaded hole, the pressing plate includes a pressing plate through hole and a pressing plate contact surface, and the pressing plate is fixedly connected to the sealing seat by bolts.

[0013] The present invention offers the following advantages: the sealing frame, sealing waist, and sealing lip are all made of rubber, resulting in excellent overall flexibility. Furthermore, the rubber frame is reinforced with long glass fiber, ensuring excellent dimensional stability. The multi-layered sealing lip, the rotating shaft, and the mounting slot form a multi-layered sealing space, providing an oil seal. The secondary sealing lip provides an interference fit with the rotating shaft, providing dust and water protection, preventing corrosion of the rotating shaft by dust and moisture, and ensuring long-term, stable service for the fan.

[0014] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0016] Figure 1 Markings in the middle are: 110 supporting frame, 111- rubber frame, 112- reinforced glass fiber, 113- frame chamfer;

[0017] 120-main seal waist A, 121-concave corner at waist A, 122-lip A;

[0018] 130-main seal waist B, 131-concave corner at waist B; 132-lip B;

[0019] 140-main seal waist C, 141-concave corner at waist C, 142-lip C;

[0020] 150-main seal waist D, 151-concave corner at waist D, 152-lip D;

[0021] 160-main seal waist E, 161-concave angle at waist E, 162-lip E;

[0022] 170-secondary sealing waist, 171-concave corner at the secondary sealing waist, 172-secondary sealing lip.

[0023] Figure 2 It is an assembly diagram of the present invention;

[0024] Figure 2 The markings in the figure are: 100-sealing ring, 200-sealing seat, 211-sealing seat mounting groove, 212-sealing seat threaded hole, 300-sealing pressure plate, 311-pressure plate through hole, 312-pressure plate contact surface, 400-rotating shaft, 500-sealing space. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figure 1 As shown, a long glass fiber reinforced rubber skeleton multi-lip sealing ring structure includes a support skeleton 110, a main sealing waist A120, a main sealing waist B130, a main sealing waist C140, a main sealing waist D150, a main sealing waist E160 and a secondary sealing waist 170.

[0027] The support frame 110 includes a rubber frame 111, reinforced glass fiber 112 and a frame chamfer 113, which plays the role of fixing and supporting the sealing ring.

[0028] The main rubber waist A120 connects the rubber skeleton 110 and the rubber lip A122, and there is an inward waist A concave corner 121 at the connection with the rubber skeleton.

[0029] The main rubber waist B130 connects the rubber skeleton 110 and the rubber lip B132, and there is an inward waist B concave corner 131 at the connection with the rubber skeleton.

[0030] The main rubber waist C140 connects the rubber skeleton 110 and the rubber lip C142, and there is an inward waist C concave corner 141 at the connection with the rubber skeleton.

[0031] The main rubber waist D150 connects the rubber skeleton 110 and the rubber lip D152, and there is an inward waist D concave corner 151 at the connection with the rubber skeleton.

[0032] The main rubber waist E160 connects the rubber skeleton 110 and the rubber lip E162, and there is an inward waist E concave corner 161 at the connection with the rubber skeleton.

[0033] The secondary rubber waist portion 170 connects the rubber frame 110 and the secondary sealing lip 172 , and there is a secondary sealing waist concave corner 171 facing outward at the connection with the rubber frame.

[0034] In this embodiment, the concave angle of the primary seal waist allows the lips of the primary seal to face inward during installation and service, creating an interference fit with the rotating shaft and forming a multi-layer sealing space with the installation groove, thereby enhancing the sealing effect of the oil. The concave angle of the secondary seal waist allows the lips of the secondary seal to face outward during installation and service, creating an interference fit with the rotating shaft, thereby providing dust and water protection.

[0035] In this embodiment, the support frame 110 is preformed by extruding a rubber material 111 and reinforced glass fiber 112 through an extruder. The support frame 110 is then cross-linked and vulcanized with the rubber waist and rubber lip in a mold to form an integrated glass fiber reinforced rubber frame multi-lip seal. Long glass fiber provides excellent dimensional stability, ensuring stable product dimensions.

[0036] like Figure 2 As shown, the seal seat 200 is provided with a seal mounting groove 211 and a seal threaded hole 212. The seal pressure plate 300 includes a pressure plate through-hole 311 and a pressure plate contact surface 312. The rotating shaft 400 is a lip contact rotating component, which forms a multi-sealed space 500 with the seal ring support frame 110, the rubber waists (main sealing waist A 120, main sealing waist B 130, main sealing waist C 140, main sealing waist D 150, and main sealing waist E 160), and the rubber lips (lip A 122, lip B 132, lip C 142, lip D 152, and lip E 162).

[0037] In this embodiment, the sealing ring 100 is assembled into the sealing seat mounting groove 211. The sealing pressure plate 300 and the sealing seat 200 are screwed together to clamp the sealing ring support frame 110. Due to the concave angle at the joint, the rubber waists (primary sealing waist A 120, primary sealing waist B 130, primary sealing waist C 140, primary sealing waist D 150, and primary sealing waist E 160) automatically bend inward. The rubber lips (lips A 122, lip B 132, lip C 142, lip D 152, and lip E 162) form an interference fit with the rotating shaft 400, forming a multi-sealed space with the sealing seat 200 and the rotating shaft 400 to seal in lubricating oil. Due to the concave angle 171 at the joint of the secondary sealing waist, the secondary sealing waist 170 automatically bends outward, and the secondary sealing lip 172 forms an interference fit with the rotating shaft, forming a protective layer that protects against dust and moisture.

[0038] In summary, this seal utilizes a rubber material, rather than materials like impregnated cloth, for its rubber skeleton, ensuring overall flexibility. The long glass fiber reinforced rubber skeleton also ensures dimensional stability. Furthermore, the multi-layered lip has an interference fit with the rotating shaft, creating multiple oil-sealing spaces that maximize the oil-sealing effect. Furthermore, the secondary sealing lip also has an interference fit with the rotating shaft, forming a protective layer against dust and moisture, preventing these corrosions and ensuring long-term stable operation of the bearing.

[0039] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the scope of protection of the present invention in any form. All technical solutions obtained by equivalent substitution, etc., fall within the scope of protection of the present invention. Parts not covered by the present invention are the same as the existing technology or can be implemented using existing technology.

Claims

1. A long glass fiber reinforced rubber skeleton multi-lip sealing ring structure, characterized in that: It includes a supporting frame, a main sealing waist and a secondary sealing waist. The supporting frame is fixed to the sealing seat through a pressure plate. At least two main sealing waists and one secondary sealing waist are arranged below the supporting frame. A main sealing lip is provided below the main sealing waist, and a secondary sealing lip is provided below the secondary sealing waist. The oblique directions of the main sealing lip and the secondary sealing lip are opposite, and the main sealing lip and the secondary sealing lip are both interference fit with the rotating shaft. After sealing, the bending directions of the main sealing waist and the secondary sealing waist are opposite.

2. The long glass fiber reinforced rubber skeleton multi-lip sealing ring structure according to claim 1, characterized in that: The support frame includes a rubber frame, reinforced glass fiber and frame chamfers, which are used to fix and support the sealing ring; the interior of the rubber frame is reinforced with reinforced glass fiber.

3. The long glass fiber reinforced rubber skeleton multi-lip sealing ring structure according to claim 2, characterized in that: The rubber frame, the sealing waist, the main sealing lip and the secondary sealing lip are made of the same flexible rubber material.

4. The long glass fiber reinforced rubber skeleton multi-lip sealing ring structure according to claim 1, characterized in that: The upper end of the main rubber waist is connected to the rubber frame, and an inward concave corner is provided at the connection between the main rubber waist and the rubber frame.

5. The long glass fiber reinforced rubber skeleton multi-lip sealing ring structure according to claim 1, characterized in that: The upper end of the secondary sealing waist is connected to the rubber frame, and an outward concave corner is provided at the connection between the secondary sealing waist and the rubber frame.

6. The long glass fiber reinforced rubber skeleton multi-lip seal ring structure according to claim 1, characterized in that: There are five main sealing waist parts in total, and the five main sealing waist parts are arranged in parallel at intervals to form a multi-layer sealing structure.

7. The long glass fiber reinforced rubber skeleton multi-lip seal ring structure according to claim 1, characterized in that: The main sealing lip is interference fit with the rotating shaft and forms a multi-layer sealing space with the installation groove for sealing lubricating oil; the secondary sealing lip is interference fit with the rotating shaft for preventing dust and water.

8. The long glass fiber reinforced rubber skeleton multi-lip seal ring structure according to claim 1, characterized in that: The secondary sealing waist and the adjacent primary sealing waist form an "eight"-shaped structure after installation, wherein the secondary sealing waist bends outwards and the primary sealing waist bends inwards.

9. The long glass fiber reinforced rubber skeleton multi-lip seal ring structure according to claim 1, characterized in that: The sealing seat is provided with a sealing installation groove and a sealing threaded hole, the pressing plate includes a pressing plate through hole and a pressing plate contact surface, and the pressing plate is fixedly connected to the sealing seat by bolts.

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