Efficient ball bearing of centrifugal disc structure

Abstract

The invention discloses an efficient ball bearing of a centrifugal disc structure, and relates to the technical field of bearing manufacturing, the efficient ball bearing comprises a bearing inner ring, a bearing outer ring is arranged outside the bearing inner ring, and two centrifugal discs are symmetrically and movably connected to the top end and the bottom end between the bearing inner ring and the bearing outer ring; a plurality of ball bodies are evenly arranged between the two centrifugal plates and located in the middle of the bearing inner ring and the bearing outer ring. Through the design of the bow-shaped grooves of the centrifugal plates, the bow-shaped grooves are formed in the sides, away from the ball bodies, of the centrifugal plates, and the bow-shaped grooves and the bearing outer ring form a multi-stage labyrinth type channel. The groove shaped like the Chinese character'gong 'is matched with the outer ring of the bearing to form a discontinuous and zigzag multi-stage channel, and pollutants can intrude into the bearing only after being subjected to multiple direction changes and flow channel contraction. The bow-shaped groove is matched with the outer ring to form a multi-stage Z-shaped channel, pollutants need to be subjected to multiple times of direction turning and flow channel section shrinkage, and the direct penetration probability is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing manufacturing, in particular to a high-efficiency ball bearing with a centrifugal disc structure. Background Art

[0002] High-efficiency ball bearings are a technological benchmark in the rolling bearing field. Through structural innovation, material upgrades, and process optimization, they achieve core advantages of low friction, high precision, and long life. They have become a key component for improving efficiency, reducing energy consumption, and emphasizing precision in high-end equipment such as new energy vehicles, industrial robots, and aerospace. High-efficiency ball bearings are specifically designed and manufactured to significantly reduce operating friction, minimize energy loss, extend service life, and enhance overall system performance. They go beyond the basic functions of ordinary ball bearings, focusing on optimizing efficiency and reliability. They are particularly suitable for applications that demand high energy consumption, precision, speed, and lifespan.

[0003] However, the existing technology faces the contradiction of "irreconcilable sealing performance and friction loss." Existing high-efficiency ball bearings are mainly divided into two categories: open bearings and sealed bearings. Open bearings are open at both ends, which reduces friction loss, but lack pollution protection and are easily damaged by the intrusion of impurities. Contact-sealed bearings use contact seals such as rubber sealing rings. Although they can effectively block pollutants, they have high friction resistance, high energy loss, and the seals are prone to wear and have a limited lifespan. Non-contact sealed bearings have low friction loss, but have difficulty blocking tiny particles and liquid pollutants, resulting in insufficient sealing effect. The high friction of contact seals can shorten the range of electric vehicles, and frequent seal replacement increases maintenance costs. Open bearings or traditional non-contact seals cannot meet pollution protection requirements, especially in electric drive systems, where lubricant leakage or impurity intrusion can cause motor failure.

[0004] The details of the existing related invention patents are as follows:

[0005] Chinese patent application number: CN201310262205.2, the invention patent name is: Bearing anti-fouling device and centrifugal pump equipped with a bearing anti-fouling device, the invention includes a bearing cover, a bearing and a bearing sleeve, the two ends of the outer ring of the bearing are clamped and fixed by the bearing cover, the inner ring of the bearing is installed on the pump shaft, one side of the bearing sleeve is adjacent to the bearing and sleeved on the pump shaft, the bearing anti-fouling device also includes a dirt baffle, the dirt baffle is adjacent to the other side of the bearing sleeve and sleeved on the pump shaft and can rotate with the pump shaft. The present invention has a simple structure, is safe and reliable, and can effectively prevent leakage medium and dust from the pump from entering the bearing chamber, and can cool the bearing, extend the bearing life and improve the operational reliability of the pump.

[0006] While the aforementioned existing patents effectively address the potential for contaminant adhesion to the bearings through external devices, they require the installation of an additional centrifugal assembly, increasing the overall size of the bearing system and compromising the compactness of the device. Furthermore, the additional materials and complex assembly process significantly increase costs. The external centrifugal device requires additional energy to drive the centrifugal assembly, increasing system energy consumption. Furthermore, the device may not respond to speed changes in real time, resulting in insufficient or excessive centrifugal force, compromising sealing effectiveness. Summary of the Invention

[0007] The purpose of the present application is to provide a high-efficiency ball bearing with a centrifugal disc structure, so as to solve the problem of excessively high costs that may be caused by existing external anti-fouling devices.

[0008] The present invention aims to provide a high-efficiency ball bearing with a centrifugal disc structure. Through a non-contact dynamic sealing design, it combines the advantages of open bearings and sealed bearings to achieve the technical effects of low friction, high sealing and long life. It is suitable for scenarios that are sensitive to energy efficiency, such as new energy vehicles.

[0009] A high-efficiency ball bearing with a centrifugal disc structure comprises an inner ring, an outer ring disposed externally thereto, and two centrifugal discs symmetrically and movably connected at the top and bottom ends of the inner and outer rings. A plurality of ball bodies are evenly spaced between the two centrifugal discs, midway between the inner and outer rings. The centrifugal discs are freely rotatable, replacing traditional rubber seals and reducing internal bearing friction by approximately 80%. Furthermore, by isolating the ball bodies and raceway from external contamination and excess grease, the centrifugal discs effectively protect the ball bodies and raceway from external contamination.

[0010] As a further improvement to the present invention, the centrifugal discs are nested outside the bearing inner ring. They form an interference fit with the bearing inner ring, achieving synchronous rotation. A non-contact gap of 0.15-0.20 mm is maintained between the centrifugal discs and the bearing outer ring. This interference fit creates a tight connection between the centrifugal discs and the bearing inner ring through radial pressure generated by elastic deformation. This design ensures synchronous rotation between the centrifugal discs and the inner ring, preventing seal failure due to speed differences.

[0011] As a further improvement to the present invention, each centrifugal disc is provided with a bow-shaped groove on the side away from the ball body. These bow-shaped grooves and the bearing outer ring form a multi-level labyrinthine channel. This creates a discontinuous, tortuous, multi-level channel, forcing contaminants to undergo multiple changes of direction and constrictions before entering the bearing.

[0012] As a further improvement to the present invention, the centrifugal disc is constructed from stamped SPCC steel sheet. A rolled edge design is employed near the bearing outer ring. The disc is press-fitted into the V-groove of the bearing outer ring using a die. SPCC undergoes a cold-rolling hardening process, achieving a tensile strength of 370-500 MPa, significantly higher than that of ordinary steel. This high strength prevents deformation of the disc under high-speed rotation or impact loads, ensuring the stability of the sealing structure. The rolled edge forms a radial protrusion on the disc's edge, forming a line contact seal with the sidewalls of the V-groove of the bearing outer ring. Compared to a flat contact seal, this design provides more uniform contact pressure distribution, effectively blocking the intrusion of contaminants such as dust and water droplets, and improving sealing performance by over 30%. The V-groove of the bearing outer ring typically has an angle of 60-90° and is formed by die stamping, mechanically interlocking with the curled edge of the disc. During press-fitting, the curled edge plastically deforms under radial pressure and embeds into the bottom of the V-groove, achieving dual axial and radial positioning, preventing the disc from loosening or falling out under high-speed rotation or impact loads.

[0013] As a further improvement to the present invention, the high-speed rotation of the bearing drives the centrifugal disk to generate centrifugal force, which is used to fling contaminants and excess lubricant outward, forming a dynamic barrier. Combined with the bow-shaped grooves or labyrinth structure on the centrifugal disk, contaminants undergo a three-stage purification process: centrifugal ejection, labyrinth isolation, and cyclonic isolation, further reducing the probability of intrusion.

[0014] As a further improvement of the present invention, the tortuous gap between the centrifugal disc and the bearing outer ring is used to prevent the infiltration of pollutants. Through multi-stage interception and dynamic barriers, the tortuous gap can effectively prevent pollutants from invading the interior of the bearing, reducing abrasive wear and corrosive wear.

[0015] As a further improvement to the present invention, the dynamic barrier and the tortuous gap are combined to block tiny particles. The dynamic barrier continuously removes newly intruding particles, while the tortuous gap intercepts residual particles that have not been completely ejected, forming a dual protection of "real-time removal + long-term blocking".

[0016] As a further improvement to the present invention, the centrifugal disc is made of 0.3-0.5mm thick stamped steel. Its inner diameter has an interference fit with the bearing inner ring, with the interference margin being 0.02-0.05mm. Its outer diameter maintains a radial clearance of 0.15-0.20mm between the outer ring and the bearing. The centrifugal disc and the bearing inner ring are both L-shaped at their joints. This L-shaped structure forms a rigid frame that can withstand the centrifugal force and vibration generated by high-speed rotation. The interference fit of the inner diameter with the bearing inner ring ensures that the centrifugal disc does not loosen under high-speed rotation, vibration, or impact.

[0017] As a further improvement of the present invention, the surface material of the centrifugal disc is hard chrome plated. The compressive stress state of the hard chrome layer can offset part of the tensile stress generated when the centrifugal disc rotates, delaying the initiation and expansion of cracks.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention replaces traditional rubber seals with centrifugal discs, eliminating contact friction and reducing friction losses by 70-80% compared to traditional sealed bearings. The contact friction between traditional rubber seals and the inner ring can cause surface wear and hardening of the seals, and even failure due to carbonization at high temperatures. This can lead to grease leakage or contaminant intrusion, accelerating wear of the bearing raceways and steel balls. The centrifugal disc design eliminates contact friction, avoiding seal wear and reducing grease degradation caused by frictional heat, thereby extending bearing life to 10 times that of open bearings and twice that of traditional sealed bearings. Furthermore, traditional rubber seals are prone to hardening and failure at high temperatures, brittle cracking at low temperatures, and are sensitive to chemical media. The centrifugal disc design blocks contaminant intrusion through a non-contact labyrinthine channel. It is not restricted by the rubber material and can operate in a wide temperature range of -40°C to 150°C, and can withstand highly corrosive media.

[0020] 2. The centrifugal disc features a bow-shaped groove design. The side of the centrifugal disc away from the ball body is equipped with a bow-shaped groove, which forms a multi-level maze-like channel with the outer ring of the bearing. The bow-shaped groove and the outer ring of the bearing form a discontinuous, tortuous multi-level channel, forcing contaminants to undergo multiple changes in direction and contraction of the flow channel before they can penetrate the interior of the bearing. The bow-shaped groove and the outer ring form a multi-level "Z"-shaped channel, forcing contaminants to undergo multiple directional changes and contraction of the flow channel, significantly reducing the probability of direct penetration. Furthermore, the centrifugal disc rotates at high speed with the inner ring, and the arched structure on the outer edge of the bow-shaped groove generates a strong centrifugal force, instantly throwing contaminants that contact the surface of the centrifugal disc to the outside of the maze channel, preventing them from accumulating near the raceway.

[0021] 3. The present invention adopts a curling design near the outer ring of the bearing. The curling structure forms a radial protrusion on the edge of the centrifugal disk, forming a line contact seal with the side wall of the V-groove of the outer ring of the bearing. Compared with the plane contact seal, this design has a more uniform contact pressure distribution, which can effectively prevent the invasion of pollutants such as dust and water droplets, and improve the sealing performance by more than 30%. The curling structure forms a line contact with the side wall of the V-groove, and the contact area is a narrow line rather than a plane. According to Hertz contact theory, line contact can concentrate the total contact force in a smaller area, but through the geometric guidance of the V-groove, the pressure is evenly distributed along the contact line, avoiding the edge stress concentration problem that is common in plane contact. In addition, due to the small contact area, the friction loss of the line contact seal is significantly reduced.

[0022] 4. This invention combines centrifugal barriers with labyrinthine gaps. Through multi-stage interception and dynamic barriers, the tortuous gaps effectively prevent contaminants from entering the bearing interior, reducing abrasive and corrosive wear. Contaminants must undergo multiple directional shifts and flow constrictions before entering the bearing. Based on the principles of fluid mechanics, each shift reduces the contaminant flow rate by 40%-60%, reducing the overall leakage rate by over 30% compared to traditional flat seals. The multi-stage labyrinth channel, through its stepped gap design, balances the pressure differential between the inside and outside of the bearing, preventing high-pressure gas or liquid from forcibly breaking through the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the present invention.

[0026] Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged three-dimensional structure at point A in the middle.

[0027] In the figure: 100, bearing inner ring; 200, centrifugal disc; 300, bearing outer ring; 400, ball body. DETAILED DESCRIPTION

[0028] 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.

[0029] A high-efficiency ball bearing with a centrifugal disc structure, such as Figure 1-3As shown, the bearing comprises an inner ring 100, with an outer ring 300 disposed outside the inner ring 100. Two centrifugal discs 200 are symmetrically and movably connected at the top and bottom ends between the inner ring 100 and the outer ring 300. Several ball bodies 400 are evenly spaced between the two centrifugal discs 200, located midway between the inner ring 100 and the outer ring 300. Each centrifugal disc 200 is nested outside the inner ring 100, forming an interference fit with the inner ring 100 to achieve synchronous rotation. A non-contact gap of 0.15-0.20 mm is maintained between the centrifugal discs 200 and the outer ring 300. Each centrifugal disc 200 is provided with a bow-shaped groove on the side away from the ball bodies 400. These grooves, together with the outer ring 300, form a multi-level labyrinthine passage. The centrifugal disc 200 is constructed from stamped SPCC steel. The disc 200 features a rolled edge design near the bearing outer ring 300 and is press-fitted into the V-groove of the bearing outer ring 300 using a die. The high-speed rotation of the bearing generates centrifugal force within the disc 200, which drives contaminants and excess lubricant outward, forming a dynamic barrier. A tortuous gap between the disc 200 and the bearing outer ring 300 prevents contaminants from entering. This dynamic barrier and tortuous gap together serve to block microparticles. The disc 200 is constructed from 0.3-0.5mm thick stamped steel. Its inner diameter has an interference fit of 0.02-0.05mm with the bearing inner ring 100. A radial clearance of 0.15-0.20mm is maintained between its outer diameter and the bearing outer ring 300, creating an L-shaped joint. The centrifugal disc 200 has an interference fit with the bearing inner ring 100, meaning it is installed on the bearing inner ring 100. The interference fit ensures that the centrifugal disc 200 rotates with the bearing inner ring 100 after installation. Too little interference can lead to loosening or falling out. During operation, the inner ring 100 rotates, driving the centrifugal disc 200 with it; the bearing outer ring 300 remains stationary. This 0.15-0.20mm gap prevents interference and friction between the centrifugal disc 200 and the bearing outer ring 300 during rotation. The centrifugal disc 200 is hard chrome-plated. Combining a dynamic centrifugal barrier and a bow-shaped labyrinth seal, the centrifugal disc generates a centrifugal force exceeding 200G during high-speed rotation, radially ejecting contaminants and excess lubricant, forming an active protective layer. The multi-stage zigzag channel with a clearance of 0.15-0.20mm utilizes three 90° turns to dissipate the kinetic energy of contaminants and prevent the intrusion of particles larger than 10μm. This prevents external dust from entering the lubrication area, avoids the formation of a grinding paste effect, extends the lubrication life by more than 30%, discharges excess lubricating oil, and prevents oil viscosity from causing temperature rise.

[0030] In Example 1, bearings used in electric vehicle drive shafts are used as an example. These bearings are used in the intermediate shaft of electric vehicle transmissions: they are adapted to 800V electric drive systems, reduce friction losses during high-speed rotation, and extend the life of the transmission; motor drive shafts: they combine anti-corrosion coating technology for silicon carbide semiconductor motor controllers to prevent electrical breakdown and contamination intrusion; and hybrid vehicle drive systems: they reduce friction losses during the start-stop process of the internal combustion engine and reduce carbon emissions.

[0031] The centrifugal disc 200 is made of 0.4mm thick stamped steel. Its inner diameter is an interference fit with the bearing inner ring 100, while its outer diameter maintains a 0.20mm radial clearance with the outer ring 300. Its outer edge is arched, and its notches are L-shaped, forming a labyrinthine channel. Hard chrome plating enhances wear resistance on the centrifugal disc 200. When the motor speed reaches 15,000 rpm, the centrifugal disc 200 rotates synchronously with the inner ring 100, generating centrifugal force that drives excess lubricant outward from the bearing and out through the labyrinthine gap. Contaminants such as dust and liquids that come into contact with the centrifugal disc 200 are ejected by the centrifugal force and prevented from passing through the labyrinthine channel. Later, cleaning grease enters the bearing raceway through tiny channels in the labyrinthine gap to maintain lubrication. Friction loss is reduced by approximately 80% compared to traditional sealed bearings, resulting in a measured reduction of 32W of energy loss per bearing and a 1.2% increase in electric vehicle range. When the centrifugal disc 200 rotates at a high speed of 15,000rpm, the centrifugal force throws the excess grease in the bearing to the outside and discharges it to the gearbox oil pan through the maze channel, avoiding the oil churning loss caused by excessive accumulation of grease in the raceway. Calculated based on the electric vehicle's power consumption of 15kWh / 100km, the reduction of 32W loss corresponds to 0.032kWh of electricity saved per 100 kilometers and a 1.2% increase in cruising range. For models with a NEDC range of 500km, the actual range increases by 6km, and an annual driving of 20,000 kilometers can save about 200 yuan in electricity bills. At 15,000rpm, the centrifugal force generated by the centrifugal disc 200 (F=mω 2 The maximum force (r, m = 0.1 kg, r = 0.05 m) reaches 12,340 N, which can completely offset the viscous resistance of the grease (about 100 N), ensuring smooth grease flow and avoiding lubrication failure caused by high speed.

[0032] Table 1 Experimental data of centrifugal disc of electric vehicle drive shaft bearing

[0033]

[0034] Experiments have shown that bearings using the hard chrome-plated centrifugal disc 200, in the electric vehicle industry, utilize a labyrinthine channel and centrifugal oil-spinning design to increase grease removal from 10% to 60%, reduce churning losses by 55%, and prevent energy loss caused by excessive grease accumulation at high speeds. The labyrinthine channel design reduces dust intrusion by 96% to 98%, significantly extending bearing and gearbox life. The disc is suitable for 800V electric drive systems, silicon carbide motor controllers, and hybrid internal combustion engine start-stop scenarios.

[0035] In Example 2, using bearings used in industrial robot joints as an example, the centrifugal disc 200 is made of stamped steel sheet SPCC. The centrifugal disc 200200 features a curled edge design near the bearing outer ring 300. The centrifugal disc 200 is press-fitted into the V-groove of the bearing outer ring 300 using a die interference fit. In robot joint bearings requiring high precision, low friction, and a long life, this structure can reduce maintenance frequency and improve motion accuracy and stability. In scenarios where lightweight and high precision are extremely demanding, a 0.4mm thick hard chrome-plated stamped steel centrifugal disc 200 can reduce bearing weight by 50% while ensuring motion accuracy and meeting precision transmission requirements. Furthermore, during high-speed reciprocating motion (frequency 5Hz), the friction coefficient of the hard chrome-plated centrifugal disc 200 fluctuates within a range of <0.02, significantly lower than the 0.1 of the untreated part, and motion stability is improved by three times.

[0036] Table 2 Experimental data of hard chrome-plated centrifugal discs of industrial robot joint bearings

[0037]

[0038] Experiments have shown that when bearings with hard chrome-plated centrifugal discs 200 are used in the industrial robot industry, the 0.28mm hard chrome-plated stamped steel centrifugal discs 200 can reduce the total weight of the bearings by 26%. At the same time, the radial runout error is reduced to ±0.01mm, and the repeatability accuracy reaches ±0.005mm, meeting the high-precision and low-inertia requirements of industrial robot joints.

[0039] In Example 3, using a bearing used in a wind turbine gearbox as an example, the centrifugal disc 200 is made of 0.28mm thick stamped steel. The inner diameter of the centrifugal disc 200 has an interference fit with the bearing inner ring 100, with the interference fit being 0.02-0.05mm. The outer diameter of the centrifugal disc 200 maintains a 0.20mm radial clearance with the bearing outer ring 300, and the centrifugal disc 200 and the bearing inner ring 100 form an L-shaped joint. Under conditions of large eccentricity and severe vibration, the 0.20mm clearance and L-shaped joint ensure stable operation of the centrifugal disc 200, reducing the failure rate to below 0.1% and saving over one million yuan in annual maintenance costs. The hard chrome plating on the surface of the centrifugal disc 200 also makes the bearing highly adaptable to harsh environments. Experiments have shown that, under conditions of salt spray, dust, and temperature fluctuations (-40°C to 80°C), the corrosion rate of the hard chrome-plated centrifugal disc 200 is less than 0.001mm / year, the wear is less than 0.01mm / year, and the failure rate drops to below 0.01%. This means that the annual maintenance cost of a single wind turbine gearbox equipped with the hard chrome-plated centrifugal disc 200 can be reduced by 80% (from 500,000 yuan to 100,000 yuan), with a payback period of just 1.5 years.

[0040] Table 3 Experimental data of hard chrome-plated centrifugal discs in wind turbine gearbox bearings

[0041]

[0042] Experiments show that when bearings with hard chrome-plated centrifugal discs 200 are used in wind turbine gearboxes, the sealing efficiency is increased by 87.5%, and the failure rate is reduced to 0.5%, approaching "zero failure".

[0043] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-efficiency ball bearing with a centrifugal disc structure, comprising a bearing inner ring (100), characterized in that: A bearing outer ring (300) is arranged outside the bearing inner ring (100), and two centrifugal discs (200) are symmetrically and movably connected at the top and bottom ends between the bearing inner ring (100) and the bearing outer ring (300), and a plurality of ball bodies (400) are evenly arranged between the two centrifugal discs (200) and located in the middle of the bearing inner ring (100) and the bearing outer ring (300).

2. The high-efficiency ball bearing with a centrifugal disc structure according to claim 1, characterized in that: The centrifugal discs (200) are nested on the outside of the bearing inner ring (100), and the centrifugal discs (200) and the bearing inner ring (100) are interference fit to achieve synchronous rotation, and the centrifugal discs (200) and the bearing outer ring (300) maintain a non-contact gap of 0.15-0.20 mm.

3. The high-efficiency ball bearing with a centrifugal disc structure according to claim 1, characterized in that: A bow-shaped groove is provided on one side of the centrifugal disc (200) away from the ball body (400), and the bow-shaped groove and the bearing outer ring (300) form a multi-level labyrinth channel.

4. The high-efficiency ball bearing with a centrifugal disc structure according to claim 1, characterized in that: The centrifugal disc (200) is made of a stamped steel plate SPCC, and a curling design is adopted near the bearing outer ring (300). The centrifugal disc (200) is press-fitted into the V-shaped groove of the bearing outer ring (300) by a mold interference fit.

5. The high-efficiency ball bearing with a centrifugal disc structure according to claim 1, characterized in that: The high-speed rotation of the bearing drives the centrifugal disc (200) to generate centrifugal force, and the centrifugal force generated by the centrifugal disc (200) is used to throw pollutants and external excess lubricating oil to the outside to form a dynamic barrier.

6. The high-efficiency ball bearing with a centrifugal disc structure according to claim 5, characterized in that: The tortuous gap between the centrifugal disc (200) and the bearing outer ring (300) is used to prevent the infiltration of pollutants.

7. A high-efficiency ball bearing with a centrifugal disc structure according to claim 6, characterized in that: The dynamic barrier and the tortuous gap are combined to block tiny particles.

8. The high-efficiency ball bearing with a centrifugal disc structure according to claim 7, characterized in that: The centrifugal disc (200) is made of 0.3-0.5 mm thick stamped steel. The inner diameter of the centrifugal disc (200) is interference-fitted with the bearing inner ring (100), and the interference is 0.02-0.05 mm. The outer diameter of the centrifugal disc (200) maintains a radial clearance of 0.15-0.20 mm with the bearing outer ring (300). The fitting portion of the centrifugal disc (200) and the bearing inner ring (100) is L-shaped.

9. The high-efficiency ball bearing with a centrifugal disc structure according to claim 1, characterized in that: The surface material of the centrifugal disc (200) is hard chrome plating.

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