Retainer and high-speed sealing grease lubrication angular contact ball bearing

Abstract

The utility model discloses a retainer and a high-speed sealing grease lubrication angular contact ball bearing. Spiral oil grooves coaxial with the retainer are formed in the outer surfaces of the two sides of a pocket in the retainer; and the inner surface of the retainer is an inclined surface with an inclination angle of 3-5 degrees from the middle diameter to the two end surfaces. The continuous lubrication time of the bearing is prolonged by redesigning the structure of the retainer, so that the service life of the high-speed sealing grease lubrication angular contact ball bearing is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a retaining frame and a high-speed sealing grease lubricated angular contact ball bearing. Background Art

[0002] High-speed grease-lubricated angular contact ball bearings are mainly used for high-speed grease-lubricated spindles. Compared with oil-gas lubricated bearings, this type of bearing does not require compressed air, nor does it require continuous supply of lubricating oil. It also does not cause oil mist pollution to the environment, and is environmentally friendly and energy-saving. However, the service life of high-speed grease-lubricated angular contact ball bearings is much lower than that of oil-gas lubricated high-speed precision angular contact ball bearings, which limits the use of high-speed grease-lubricated angular contact ball bearings. The main reason for the short service life is the short continuous lubrication time of high-speed grease-lubricated angular contact ball bearings.

[0003] At the same time, for high-speed grease-lubricated angular contact ball bearings, the amount of grease retained on the cage is the key to the bearing's operation. However, the existing cage has a simple structure, and as the speed increases, the grease cannot be effectively retained on the cage due to centrifugal force. This will cause local accumulation or lack of grease, resulting in poor bearing lubrication and reduced bearing life. Utility Model Content

[0004] In order to overcome the deficiencies in the prior art, the utility model provides a cage and a high-speed sealing grease lubricated angular contact ball bearing, by redesigning the structure of the cage to increase the continuous lubrication time of the bearing, thereby increasing the service life of the high-speed sealing grease lubricated angular contact ball bearing.

[0005] In order to achieve the above purpose, the specific scheme adopted by the utility model is:

[0006] A retainer, wherein the outer surfaces of both sides of the pocket hole in the retainer are provided with spiral oil grooves coaxial with the retainer; the inner surface of the retainer is an inclined surface with an inclination angle of 3-5 degrees from the middle diameter to the two end surfaces.

[0007] Furthermore, the retainer is formed by melt-casting after mixing a composite material of 15% carbon fiber and polyetheretherketone with a pore-forming agent in a mass ratio of 92:8.

[0008] A high-speed sealing grease lubricated angular contact ball bearing comprises an inner ring, an outer ring, a rolling body, a sealing ring and a retaining frame; the retaining frame is the retaining frame mentioned above.

[0009] Furthermore, the inner surface of the retainer and the outer surface of the inner ring enclose a wedge-shaped space.

[0010] Beneficial effects:

[0011] 1) On the cage of the utility model, spiral oil grooves are wound on both sides of the pockets on the outer surface of the cage. When the cage runs at high speed, the spiral oil grooves can transport the grease between the seal ring and the cage to the rolling element area to provide continuous lubrication for the bearing. The inner surface of the cage is an inclined surface with an inclination angle of 3-5° from the middle diameter to the two end faces. The inner surface of the cage and the outer surface of the inner ring form a wedge-shaped space. When the bearing runs at high speed, it can promote the gas to flow to the bearing rolling element, which is conducive to the grease reflux and lubrication of the bearing. This cage structure can increase the service life of high-speed sealing grease lubricated angular contact ball bearings.

[0012] 2) In the utility model, the porous polyetheretherketone retainer body obtained by melt-casting is formed by mixing 15% carbon fiber and polyetheretherketone composite material with a pore-forming agent in a mass ratio of 92:8. The body can absorb and store lubricating oil and provide long-term lubrication for the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A cross-sectional view of the bearing.

[0014] Figure 2 Schematic diagram of the structure of the cage.

[0015] Figure 3 A cross-sectional view of the cage.

[0016] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0017] Graphic markings: 1. Inner ring, 2. Outer ring, 3. Rolling element, 4. Cage, 41. Spiral oil groove, 42. Pocket, 5. Sealing ring. DETAILED DESCRIPTION

[0018] The technical solution of the utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0019] The utility model discloses a retainer and a high-speed sealing grease lubricated angular contact ball bearing, please refer to Figure 1 and Figure 2 The high-speed sealing grease lubricated angular contact ball bearing is composed of an inner ring 1, an outer ring 2, a rolling element 3, a cage 4, and a sealing ring 5. The rolling element 3 is in the pocket 42 of the cage 4, and the sealing ring 5 can prevent the grease from overflowing.

[0020] Combine the following Figure 2-Figure 4 The retainer is described in detail.

[0021] Structurally, both sides of the pocket 42 on the outer surface of the cage 4 are provided with spiral oil grooves 41. When the cage 4 runs at high speed, the spiral oil grooves can transport the grease between the seal ring 5 and the cage 4 to the rolling element area, providing continuous lubrication for the bearing. The inner surface of the cage 4 is an inclined surface with an inclination angle α of 3-5° from the middle diameter to the two end faces. The inner surface of the cage 4 and the outer surface of the inner ring 1 form a wedge-shaped space. When the bearing runs at high speed, it can promote the gas to flow to the bearing rolling element 3, which is conducive to the grease reflux and lubrication of the bearing. Through this design, the cage 4 can store and absorb lubricating oil, and can also transport the lubricating oil stored between the seal ring 5 and the cage 4 to the bearing rolling element area, providing the bearing with sufficient and continuous lubrication, greatly extending the bearing life.

[0022] Specifically, a spiral oil groove 41 wound multiple times is evenly arranged on each side of the pocket hole 42 on the outer surface of the retainer 4 .

[0023] In terms of material, cage 4 is made of 15% carbon fiber plus polyetheretherketone composite material and pore-forming agent (generally NaCl, K2CO3, starch, sucrose and other soluble substances) mixed in a mass ratio of 92:8 and then melt-cast to obtain a porous polyetheretherketone cage. Bearing cage 4 is made of porous polyetheretherketone material. There are micro gaps in the porous polyetheretherketone cage body, which can absorb and store lubricating oil and provide long-term lubrication for the bearing.

[0024] In general, the utility model can significantly increase the continuous lubrication time of the bearing by improving the structure of the cage and the material of the cage, thereby increasing the service life of the high-speed sealing grease lubricated angular contact ball bearing.

[0025] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any equivalent changes or modifications made according to the essence of the utility model should be included in the protection scope of the utility model.

Claims

1. A retainer, characterized in that: The outer surfaces of both sides of the pocket hole in the cage are provided with spiral oil grooves coaxial with the cage; the inner surface of the cage is an inclined surface with an inclination angle of 3-5° from the middle diameter to the two end surfaces.

2. A high-speed sealing grease lubricated angular contact ball bearing, characterized in that: It comprises an inner ring, an outer ring, rolling elements, a sealing ring and a retaining frame; the retaining frame is the retaining frame described in claim 1.

3. A high-speed sealing grease lubricated angular contact ball bearing according to claim 2, characterized in that: The inner surface of the retainer and the outer surface of the inner ring form a wedge-shaped space.

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