Sealing ring structure suitable for low-viscosity grease

Abstract

The invention discloses a sealing ring structure suitable for low-viscosity grease, the sealing ring structure comprises a sealing ring mounting shaft seat, an active pumping sealing ring, an outer side sealing ring and a rack, the sealing ring mounting shaft seat is provided with a spring groove and a sealing mounting groove, a compression spring is mounted in the spring groove, and the sealing mounting groove is provided with a sealing ring. An active pumping sealing ring and an outer side sealing ring are installed in the sealing installation groove, lips of the active pumping sealing ring and the outer side sealing ring are tightly attached to the machine frame in an interference fit mode, and meanwhile the upper portion of the lip of the active pumping sealing ring is extruded by the compression spring. The service life of the bearing and the sealing ring is remarkably prolonged, the maintenance cost is reduced, the equipment operation efficiency is improved, and good economic benefits and market potential are achieved.

Description

Technical Field

[0001] The invention relates to a sealing ring structure suitable for low-viscosity grease, and belongs to the field of bearing sealing in the wind power generation industry. Background Art

[0002] The large-scale wind turbine units have led to higher requirements for the bearing load-bearing capacity, and accordingly, the bearings' demand for lubrication has also increased. To meet these requirements, traditional sealing structures often have poor sealing effects when dealing with low-viscosity grease. Low-viscosity grease has strong fluidity and is prone to leaking from the sealing gap, which not only causes grease waste, but may also affect the normal lubrication and service life of the bearings. At the same time, under complex working conditions in industries such as wind power generation, such as high temperature, low temperature, high humidity, and strong vibration, the performance of traditional sealing structures will further decline, making it difficult to ensure stable and reliable sealing performance. Therefore, it is of great practical significance to develop an efficient sealing ring structure suitable for low-viscosity grease. The structure needs to have good sealing performance and be able to effectively prevent the leakage of low-viscosity grease. At the same time, it must also adapt to complex working conditions and ensure stable operation under various conditions. Summary of the Invention

[0003] The purpose of the present invention is to provide a sealing ring structure suitable for low-viscosity grease, which can effectively achieve the sealing and dust-proof functions required by the bearing, thereby extending the service life of the sealing ring.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a sealing ring structure suitable for low-viscosity grease, the sealing ring structure including a sealing ring mounting shaft seat, an active pumping sealing ring, an outer sealing ring and a frame, the sealing ring mounting shaft seat is provided with a spring groove and a sealing mounting groove, a compression spring is installed in the spring groove, and an active pumping sealing ring and an outer sealing ring are installed in the sealing mounting groove, the lips of the active pumping sealing ring and the outer sealing ring are tightly fitted with the frame by interference fitting, and at the same time, the upper part of the lip of the active pumping sealing ring is squeezed by the compression spring.

[0005] Furthermore, the active pumping sealing ring and the outer sealing ring are fixedly installed in the sealing installation groove of the sealing ring installation shaft seat through a pressure plate, and the pressure plate and the sealing ring installation shaft seat are detachably connected.

[0006] Furthermore, the active pumping sealing ring and the outer sealing ring are compressed by a concave-convex inlay structure to prevent them from falling off.

[0007] Furthermore, one end of the compression spring is fixed in the spring groove of the sealing ring mounting shaft seat, and the other end is connected to a spring pad, which is pressed tightly against the sealing lip of the active pumping sealing ring to provide the necessary clamping force for the sealing lip.

[0008] Furthermore, a spiral pumping groove is designed on the lip contact surface of the active pumping seal ring to pump the leaked grease back into the bearing cavity and reduce frictional heat between the active pumping seal ring and the frame.

[0009] Furthermore, a storage cavity, namely a pressure storage cavity, is formed between the outer sealing ring and the active pumping sealing ring to prevent the active pumping sealing ring from directly contacting the atmosphere and causing a large pressure difference between the bearing cavity and the outside world, thereby reducing the risk of leakage.

[0010] Furthermore, the lip of the outer sealing ring is tilted toward one side of the active pumping sealing ring to prevent external impurities from being pumped into the bearing cavity by the active pumping sealing ring.

[0011] The beneficial effects of the present invention are as follows: the sealing ring structure of the present invention not only improves the sealing effect and reliability, but also effectively addresses the sealing challenge of low-viscosity grease. Through the spiral pumping groove of the active pumping sealing ring, the leaked grease is pumped back to the bearing cavity in time, which significantly reduces the loss of grease and reduces the cost of use. In addition, the pressure storage cavity formed by the joint action of the outer sealing ring and the active pumping sealing ring reduces the pressure difference, further reduces the risk of leakage, and effectively prevents external impurities from invading the bearing cavity, providing a cleaner operating environment for the bearing. Even under complex working conditions, this structure can still maintain a stable sealing effect, significantly prolonging the service life of the bearing and sealing ring, reducing equipment maintenance costs and downtime, improving equipment operation efficiency and reliability, and has good economic benefits and market application potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a two-dimensional cross-sectional schematic diagram of a sealing ring structure for low-viscosity grease of the present invention.

[0013] Markings in the figure are: 10-seal ring mounting shaft seat, 11-spring groove, 12-seal ring mounting groove, 20-spring, 21-spring pad, 30-frame, 40-pressure plate, 50-outer seal ring, 51-concave and convex anti-dropout buckle, 60-active pumping seal ring, 61-spiral pumping groove, 70-pressure storage chamber. DETAILED DESCRIPTION

[0014] like Figure 1The figure shows a sealing ring structure for low-viscosity grease, comprising a sealing ring mounting seat 10, a spring groove 11, a spring 20, a spring washer 21, a frame 30, a pressure plate 40, an outer sealing ring 50, and an active pumping sealing ring 60. The sealing ring mounting seat 10 serves as the foundational support for the entire structure. The spring groove 11 within it secures the spring 20, which, through the spring washer 21, provides a stable clamping force for the active pumping sealing ring 60. During installation, the active pumping sealing ring 60 and the outer sealing ring 50 are securely fastened to the sealing ring mounting seat 10 via the pressure plate 40, ensuring stable relative positioning of the various components.

[0015] During operation, the frame 30, the active pumping seal 60, and the outer seal 50 rotate relative to each other. Due to the interference fit, the frame 30 and the seal lip are tightly coupled, ensuring a secure initial seal. The spiral pumping groove 61 on the active pumping seal 60 plays a key role. During the rotation of the seal mounting shaft seat 10, the groove 61 effectively pumps any low-viscosity grease that might leak back into the bearing cavity, reducing grease waste and preventing contamination of other parts of the equipment caused by grease leakage.

[0016] The outer sealing ring 50 and the active pumping sealing ring 60 are tightly pressed together through a concave-convex interlocking structure, which not only prevents them from falling off, but also forms a pressure storage chamber 70. This pressure storage chamber 70 can balance the pressure difference between the bearing cavity and the outside world, effectively reducing the risk of grease leakage. At the same time, the outer sealing ring 50 also acts as a barrier to prevent external impurities such as dust and moisture from being pumped into the bearing cavity by the active pumping sealing ring 60, creating a clean and stable operating environment for the bearing. The spring 20 and spring washer 21 on the active pumping sealing ring 60 ensure that the sealing lip is always tightly fitted with the frame 30, and even if the sealing ring mounting shaft seat is deformed or vibrates, it can effectively prevent grease leakage. The spiral pumping groove 61 can continue to function under various working conditions and return the leaked grease to the bearing cavity in a timely manner. The existence of the outer sealing ring 50 and the pressure storage chamber 70 also further enhances the adaptability and stability of the entire structure in complex environments.

[0017] In complex working conditions, such as high temperature further reducing the viscosity of grease, low temperature causing changes in material properties, high humidity causing components to rust and corrode, and strong vibration causing shaft vibration, this sealing ring structure can still maintain stable and reliable sealing performance with its unique design and reasonable component coordination.

[0018] In summary, this sealing ring structure suitable for low-viscosity grease achieves efficient sealing and dust-proof functions through the coordinated work of various components, solves the difficulties faced by traditional sealing structures in handling low-viscosity grease, greatly extends the service life of bearings and sealing rings, reduces equipment maintenance costs and downtime, and provides strong guarantees for the stable operation of equipment in industries such as wind power generation.

[0019] 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 sealing ring structure suitable for low-viscosity grease, characterized in that: The sealing ring structure includes a sealing ring mounting shaft seat, an active pumping sealing ring, an outer sealing ring and a frame. The sealing ring mounting shaft seat is provided with a spring groove and a sealing mounting groove. A compression spring is installed in the spring groove. The active pumping sealing ring and the outer sealing ring are installed in the sealing mounting groove. The lips of the active pumping sealing ring and the outer sealing ring are tightly fitted with the frame by interference fitting. At the same time, the upper part of the lip of the active pumping sealing ring is squeezed by the compression spring.

2. A sealing ring structure suitable for low-viscosity grease according to claim 1, characterized in that: The active pumping sealing ring and the outer sealing ring are fixedly installed in the sealing installation groove of the sealing ring installation shaft seat through a pressing plate, and the pressing plate and the sealing ring installation shaft seat are detachably connected.

3. The sealing ring structure suitable for low-viscosity grease according to claim 1, characterized in that: The active pumping sealing ring and the outer sealing ring are compressed by a concave-convex inlay structure to prevent them from falling off.

4. The sealing ring structure suitable for low-viscosity grease according to claim 1, characterized in that: One end of the compression spring is fixed in the spring groove of the sealing ring mounting shaft seat, and the other end is connected to a spring pad. The spring pad is pressed tightly against the sealing lip of the active pumping sealing ring to provide the necessary clamping force for the sealing lip.

5. The sealing ring structure suitable for low-viscosity grease according to claim 1, characterized in that: A spiral pumping groove is designed on the lip contact surface of the active pumping seal ring to pump the leaked grease back into the bearing cavity and reduce frictional heat between the active pumping seal ring and the frame.

6. The sealing ring structure suitable for low-viscosity grease according to claim 1, characterized in that: A storage cavity, namely a pressure storage cavity, is formed between the outer sealing ring and the active pumping sealing ring to prevent the active pumping sealing ring from directly contacting the atmosphere and causing a large pressure difference between the bearing cavity and the outside world, thereby reducing the risk of leakage.

7. The sealing ring structure suitable for low-viscosity grease according to claim 1, characterized in that: The lip of the outer sealing ring is tilted toward one side of the active pumping sealing ring, so as to prevent external impurities from being pumped into the bearing cavity by the active pumping sealing ring.

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