Self-excited oil mist jet lubrication high-speed bearing, lubrication method and application

Abstract

The present invention discloses a self-excited oil mist jet lubrication high-speed bearing, a lubrication method and an application in a motor. The high-speed bearing comprises an outer ring sleeve and an inner ring body, the two ends of the outer ring sleeve are connected to the inner ring body through a non-contact type sealing assembly, an oil storage space and a retaining frame are provided between the outer ring sleeve and the inner ring body, the oil storage space and the retaining frame are located between the two sealing assemblies, a rolling body is provided on the retaining frame, and the oil storage space corresponds to the side of the retaining frame where the rolling body is provided. The present invention has the advantages of simple bearing structure, long high-speed and ultra-high-speed operation life of the bearing, simple lubrication system structure, low lubricating oil consumption, and no need for compressed air; by reasonably designing the internal structure of the bearing, high-speed thin oil lubrication in horizontal working conditions, vertical working conditions and inclined working conditions can be achieved, and large axial loads and radial loads can also be withstood. The bearings of the present invention are arranged on both sides of the motor rotor to increase the motor speed without using a complex lubrication system and consuming a large amount of lubricating oil.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, and in particular to a self-excited oil mist jet lubrication high-speed bearing, a lubrication method and an application thereof. Background Art

[0002] When rolling bearings are running at high speed, the friction and collision between the rolling elements and the raceways, the contact and friction between the rolling elements and the cages, and the viscous resistance of the lubricant generally generate a large amount of heat, which increases the temperature of the contact parts, causes thermal deformation, and directly reduces the working accuracy of the bearings. In severe cases, it may even cause thermal seizure of the bearings, resulting in bearing damage. A reasonable lubrication system must be used to reduce friction.

[0003] It is generally believed that the choice of lubrication method for high-speed rolling bearings is related to the bearing speed, load, allowable temperature rise, and bearing type. m n value selection (d m is the pitch diameter of the bearing rolling element; n is the operating speed). The grease lubrication method of high-speed rolling bearings can only be used for d m n value ≤ 1.3×10 6 In case of m n value ≥ 1.3×10 6 When high-speed rolling bearings are used, only thin oil lubrication can be used. Existing thin oil lubrication methods for high-speed rolling bearings include oil mist lubrication (d m n value ≤ 1.8×10 6 )、Oil-air lubrication(d m n value ≤ 2.0×10 6 )、Under-ring lubrication(d m n value ≤ 3.0×10 6 )、Jet lubrication(d m n value ≤ 3.0×10 6 ); The above four types of thin oil lubrication have many problems such as complex structure, high compressed air energy consumption, high oil consumption, and high pollution, and their application scope is also greatly limited; other available bearing types are also greatly restricted in application, such as magnetic bearings have high purchase costs, low load-bearing capacity, and are too sensitive to temperature; air bearings consume a lot of compressed air and have low load-bearing capacity.

[0004] In the existing bearing technology, the belt-driven double-row ball spinning rotor bearing is a bearing with a unique lubrication principle that uses thin oil lubrication and runs in a higher speed area. The bearing lubricant is initially installed with grease, and lubricating oil is added later. There is a typical explanation for this: after the grease has been used for a period of time, the base oil contained in it is consumed, and some base oil needs to be added regularly to maintain the performance of the original grease.

[0005] It should be pointed out that the basic type of existing rotor bearings was not designed for thin oil lubrication. It was only because the speed of grease lubrication could not be increased that it was forced to change to thin oil lubrication. Therefore, until now, rotor bearings still retain many structural features, lubrication concepts and maintenance habits suitable for grease lubrication bearings, and cannot fully adapt to thin oil lubrication.

[0006] The existing double-row ball bearings have the following problems: First, due to the limitations of structure, spatial position, transmission mode and rotor dynamics, it is difficult for the existing double-row ball bearings to achieve a rotation speed of more than 110,000 rpm (d m n value ≥ 1.55×10 6 ); second, since the internal structure of the existing double-row ball rotor bearing is only suitable for horizontal working conditions, the loss of thin oil is serious when used in vertical and inclined working conditions; third, since the existing double-row ball rotor bearing adopts deep groove ball method, its axial bearing capacity is limited and its axial accuracy is also poor; fourth, the existing double-row ball rotor bearing lubrication theory is very confusing, resulting in long-term stagnation of related technologies. Summary of the invention

[0007] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a self-excited oil mist jet lubrication high-speed bearing, a lubrication method and an application.

[0008] The technical solution of the present invention is achieved as follows: a self-excited oil mist jet lubrication high-speed bearing includes an outer ring sleeve and an inner ring body, the two ends of the outer ring sleeve are connected to the inner ring body through a non-contact sealing component, an oil storage space and a retaining frame are provided between the outer ring sleeve and the inner ring body, the oil storage space and the retaining frame are located between the two sealing components, at least one circle of rolling elements is provided on the retaining frame, and the oil storage space corresponds to a side of the retaining frame where the rolling elements are provided.

[0009] A lubrication hole is provided on the sleeve wall of the outer ring sleeve, and the lubrication hole is communicated with the oil storage space.

[0010] The retaining frame is provided with a semi-open pocket hole for positioning the rolling body, and the side of the retaining frame on which the pocket hole is provided is an open side, and the open side faces the oil storage space.

[0011] An outer raceway is arranged on the inner wall of the outer ring sleeve, an inner raceway is arranged on the outer wall of the inner ring body, and the rolling bodies are matched with the outer raceway and the inner raceway respectively.

[0012] The sealing assembly includes an inner flat gasket, an outer flat gasket and a special-shaped seal. The special-shaped seal is located between the inner flat gasket and the outer flat gasket. An O-ring is arranged between the special-shaped seal and the outer ring sleeve. A retaining ring is arranged at the outer end of the outer flat gasket. The retaining ring is fixed between the outer ring sleeve and the inner ring body by a retaining spring.

[0013] The sealing assembly comprises a gap sealing body, which is fixed between the outer ring sleeve and the inner ring body by a retaining spring, an O-type sealing ring is arranged between the gap sealing body and the outer ring sleeve, and an oil groove is arranged on the inner side surface of the gap sealing body opposite to the inner ring body.

[0014] The inner ring body is a hollow separate sleeve body or forms an inseparable integral solid shaft body together with the rotating shaft; the rolling body is a sphere or a cylinder or a conical cylinder or a spherical roller.

[0015] When the outer ring is arranged horizontally, the oil storage space is a horizontal concave annular groove, and the horizontal concave annular groove is arranged on the inner wall of the outer ring.

[0016] When the outer ring is tilted or vertically arranged, the oil storage space is an upwardly open inclined annular groove, and the inclined annular groove is arranged on the inner wall of the outer ring.

[0017] At least one inclined annular groove is arranged on the inner wall of the outer ring sleeve, and the lubrication hole is located at the upper part of the inclined annular groove at the top.

[0018] A lubrication method for a self-excited oil mist jet lubrication high-speed bearing comprises the following steps:

[0019] S1: Lubricating oil periodically enters between the outer ring and the inner ring from the lubrication hole provided on the outer ring and is stored in the oil storage space;

[0020] S2: When the inner ring rotates at high speed, the air boundary layer on the outer surface of the inner ring also rotates at high speed, and continuously throws out high-energy airflow to impact the oil stored in the oil storage space, forming a self-excited jet lubrication effect in which high-energy oil particles fly around. Some high-energy oil particles are sprayed at high speed toward the cage, rolling elements, and inner and outer raceways, forcibly lubricating the friction pairs composed of the cage and rolling elements, outer raceways, and inner raceways, thereby maintaining the high-speed rotation of the inner ring;

[0021] S3: In step S2, when the inner ring body rotates at a high speed, an eddy current sealing effect is generated at the narrow gap between the sealing component and the outer surface of the inner ring body to seal the oil.

[0022] In step S1, the lubricating oil periodically enters between the outer ring and the inner ring body. It must be ensured that when the bearing is stationary, sufficient lubricating oil remains in the oil storage space and the lubricating oil does not overflow from the narrow gap between the sealing assembly and the inner ring body, so as to maintain the self-excited jet lubrication effect when the bearing runs at high speed.

[0023] The application of self-excited oil mist jet lubrication high-speed bearings in motors, when the inner ring body is a hollow separate sleeve, the inner ring body is placed on both sides of the motor rotor of the motor and is fixedly connected to the rotating shaft, the inner hole surface of the motor rotor matches and is fixedly connected to the outer surface of the rotating shaft, and the inner ring body, the rotating shaft and the motor rotor rotate synchronously; when the inner ring body is an inseparable part of the solid shaft body, the inner ring body is placed on both sides of the motor rotor, and the inner ring body and the rotating shaft are an inseparable integral part. The inner hole surface of the motor rotor matches and is fixedly connected to the outer surface of the rotating shaft, and the inner ring body, the rotating shaft and the motor rotor rotate synchronously.

[0024] Based on the original self-excited oil mist pressurized lubrication theory, the present invention proposes a series of new high-speed bearing structures using thin oil lubrication and a basic method of combining with the motor rotor. m n corresponds to all existing thin oil lubrication methods d m n value range; its applicable scope includes various high-speed rotating occasions such as motor direct-driven spinning cup bearings, high-speed electric spindles, high-speed printing rollers, energy storage flywheels, high-speed centrifuges, high-speed compressors, etc., and has a wide range of applications. The present invention has the advantages of simple bearing structure, long high-speed and ultra-high-speed bearing operation life, simple lubrication system structure, low lubricating oil consumption, minimal pollution, and no need for compressed air; by reasonably designing the internal structure of the bearing, it can solve the high-speed thin oil lubrication of horizontal working conditions, and also solve the high-speed thin oil lubrication of vertical and inclined working conditions. In addition, the present invention solves the problem of weak axial load-bearing capacity of existing deep groove ball bearings while ensuring the lubrication effect by adopting self-excited oil mist pressurized lubrication angular thrust bearings, thereby realizing the operation of the bearings at high speeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of the structure of the present invention in Example 1.

[0027] Figure 2 This is a schematic diagram of the structure of the sealing assembly of the present invention in Example 2.

[0028] Figure 3 This is a schematic diagram of the structure of the sealing assembly of the present invention in Example 3.

[0029] Figure 4 This is a schematic diagram of the structure of the present invention in Example 4.

[0030] Figure 5 This is a schematic diagram of the structure of the present invention in Example 5.

[0031] Figure 6 This is a schematic diagram of the structure of the present invention in Example 6.

[0032] Figure 7 This is a schematic diagram of the structure of the present invention in Example 7.

[0033] Figure 8 This is a schematic diagram of the structure of the present invention in Example 8.

[0034] Fig. 9 This is a schematic diagram of the structure of the present invention in Example 9.

[0035] Fig.10 This is a schematic diagram of the structure of the present invention in Example 10.

[0036] Fig.11 This is a schematic diagram of the structure of the present invention in Example 11.

[0037] Fig.12 This is a schematic diagram of the structure of the present invention in Example 12.

[0038] Fig.13 This is a schematic diagram of the structure of the present invention in Example 13.

[0039] Fig.14 This is a schematic diagram of the structure of the present invention in Example 14. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0041] Embodiment 1, as Figure 1As shown, a self-excited oil mist jet lubrication high-speed bearing comprises an outer ring sleeve 8 and an inner ring body 4, wherein the inner ring body 4 is located inside the outer ring sleeve 8, and the inner ring body 4 is coaxially arranged with the outer ring sleeve 8. An outer raceway 19 is arranged on the inner surface of the outer ring sleeve 8, and an inner raceway 20 is arranged on the outer surface of the inner ring body 4. The outer ring sleeve 8 and the inner ring body 4 are connected by a non-contact type sealing component 3 to prevent the oil from overflowing. An oil storage space 10 is arranged on the inner wall of the outer ring sleeve 8, and the oil storage space 10 is a horizontal concave annular groove 24, which is connected to the lubrication hole 1 arranged on the outer ring sleeve 8. A retainer 6 is arranged on the outer surface of the inner ring body 4, and semi-open pockets are evenly arranged on the retainer 6 along the circumference. The side of the retainer 6 on which the pockets are arranged is an open side 9, which faces the horizontal concave annular groove 24, and the open side 9 is an open structure that is conducive to directly receiving the lubricating oil injection. A rolling body 2 is arranged in the pocket, and the rolling body 2 is a sphere. The inner ring body 4 is a hollow separate sleeve; the inner ring body 4 and the outer ring sleeve 8 are arranged horizontally, and an annular protrusion 5 corresponding to the horizontal concave annular groove 24 is arranged on the outer wall of the inner ring body 4. The surface of the protrusion 5 is arranged in a shape that is conducive to enhancing the impact force of the air boundary layer. The outer diameter d2 of the annular protrusion 5 is not less than the general diameter d1 of the inner ring body 4, and the size of d2 does not affect the free entry and exit of the inner ring body 4 inside the outer ring sleeve 8. The two ends of the inner ring body 4 extend out of the outer ring sleeve 8 respectively, and the two ends of the outer ring sleeve 8 are respectively connected with the inner ring body 4 through the sealing component 3, that is, the outer surface of the sealing component 3 and the inner ring body 4 has a slit 11 to ensure the free rotation of the inner ring body, and the horizontal concave annular groove 24 and the retainer 6 are located between the two sealing components 3. The oil enters the bearing from the lubrication hole 1 arranged on the upper part of the outer ring sleeve, flows through the outer surface of the inner ring body 4 and is stored in the horizontal concave annular groove 24. When the inner ring body 4 rotates at high speed, the air boundary layer on the outer surface of the inner ring body 4 also rotates at high speed, and continuously throws out high-energy airflow to impact the oil stored in the horizontal concave annular groove 24, forming a jet effect in which high-energy oil particles fly everywhere. A part of the high-energy oil particles are sprayed toward the open side 9 of the retainer, the rolling element 2 and the inner and outer raceways, and the friction pairs composed of the retainer 6 and the rolling element 2, the outer raceway 19 and the inner raceway 20 are forced to be lubricated, so as to maintain the high-speed rotation of the inner ring body 4.

[0042] Embodiment 2, as Figure 2As shown, a self-excited oil mist jet lubrication high-speed bearing, the sealing assembly 3 includes an inner flat pad 3-1, an outer flat pad 3-4 and a special-shaped seal 3-2, and a slit 11 is provided between the inner flat pad 3-1, the outer flat pad 3-4 and the special-shaped seal 3-2 and the inner ring body, and does not affect the rotation of the outer body. The special-shaped seal 3-2 is located between the inner flat pad 3-1 and the outer flat pad 3-4, and an O-ring 3-3 is provided between the special-shaped seal 3-2 and the outer ring sleeve 8 to ensure the sealing between the outer ring sleeve and the sealing assembly 3. A retaining ring 3-6 is provided at the outer end of the outer flat pad 3-4, and the retaining ring 3-6 is clamped between the outer ring sleeve 8 and the inner ring body 4 through a retaining ring 3-5. Due to errors generated during processing and assembly of the various parts constituting the sealing assembly 3, a groove-like structure is formed at a position close to the surface of the inner ring body 4, which effectively prevents oil from overflowing from the slit 11 between the sealing assembly 3 and the inner ring body 4.

[0043] The other structures are the same as those in Example 1.

[0044] Embodiment 3, as Figure 3 As shown, a self-excited oil mist jet lubrication high-speed bearing, the sealing assembly 3 includes a gap seal 3-7, that is, a slit 11 is provided between the seal and the inner ring 4, and does not affect the rotation of the outer body. The gap seal 3-7 is clamped between the outer ring 8 and the inner ring 4 by a retaining ring 3-5, and an O-type sealing ring 3-3 is provided between the gap seal 3-7 and the outer ring 8 to improve the sealing between the gap seal 4 and the outer ring 8. An oil groove 3-8 is provided on the adjacent surface of the gap seal 3-7 and the inner ring 4, and the setting of the oil groove can effectively prevent the oil from overflowing from the slit 11 between the seal and the inner ring 4.

[0045] The other structures are the same as those in Example 1.

[0046] Embodiment 4, as Figure 4 As shown, a self-excited oil mist jet lubrication high-speed bearing, the inner ring body of the bearing and the rotating shaft 12 together constitute an integral solid shaft body, the outer ring sleeve 8 is arranged horizontally, the oil storage space 10 is a horizontal concave annular groove 24, the solid shaft body is provided with an inner raceway 20, the outer ring sleeve is provided with an outer raceway 19, the retainer 6 is installed on the solid shaft body, and the side of the retainer 6 provided with a pocket is an open side 9, the open side 9 faces the horizontal concave annular groove 24, and the open side 9 is an open structure that is conducive to directly receiving the lubricating oil injection. A rolling body 2 is provided in the pocket. The rolling body 2 is matched with the inner and outer raceways respectively, and the two ends of the solid shaft body can extend out of the outer ring sleeve 8 respectively and be connected with other related units; or the tail of one end thereof can be integrally sealed inside the outer ring sleeve 8. The horizontal concave annular groove 24 and the retainer 6 are located between the two sealing components 3.

[0047] The other structures are the same as those in Example 2 or 3.

[0048] Embodiment 5, as Figure 5 As shown, a self-excited oil mist jet lubrication high-speed bearing is an angular contact bearing, including an outer ring sleeve 8 and an inner ring body 4, wherein the inner ring body 4 is an integral solid shaft body that is inseparable from the rotating shaft 12. The solid shaft body is located inside the outer ring sleeve 8, and the solid shaft body is coaxially arranged horizontally with the outer ring sleeve 8. An outer raceway 19 is provided on the inner surface of the outer ring sleeve 8, and an inner raceway 20 is provided on the outer surface of the solid shaft body, and the rolling body 2 is matched with the outer raceway 19 and the inner raceway 20 respectively. The axial preload 22 acts on the end face 23 of the outer ring sleeve 8 so that the outer raceway 19 and the inner raceway 20 maintain a certain preload on the rolling body 2. The outer ring 8 and the solid shaft body are connected by a non-contact sealing component 3 to prevent the oil from overflowing. An oil storage space 10 is provided on the inner wall of the outer ring 8. The oil storage space 10 is a horizontal concave annular groove 24. The horizontal concave annular groove 24 is connected to the lubrication hole 1 set on the outer ring 8. A retainer 6 is provided on the outer surface of the solid shaft body. The retainer 6 is evenly provided with semi-open pockets along the circumference. The side of the retainer 6 with pockets is an open side 9, which faces the horizontal concave annular groove 24. The open side 9 is an open structure that is conducive to directly receiving the injection of lubricating oil. A rolling body 2 is provided in the pocket, and the rolling body 2 is a sphere. The two ends of the solid shaft body can extend out of the outer ring 8 respectively and be connected to other related units; or the tail of one end can be sealed as a whole inside the outer ring 8. The horizontal concave annular groove 24 and the retainer 6 are located between the two sealing components 3. The lubricating oil enters the bearing from the lubrication hole 1 arranged on the upper part of the outer ring 8, flows through the outer surface of the solid shaft and is stored in the horizontal concave annular groove 24. When the solid shaft rotates at high speed, the air boundary layer on the outer surface of the solid shaft also rotates at high speed, and continuously throws out high-energy airflow to impact the stored oil in the horizontal concave annular groove 24, forming a jet effect in which high-energy oil particles fly everywhere. A part of the high-energy oil particles are sprayed toward the open side 9 of the retainer, the rolling element 2 and the inner and outer raceways, and the friction pairs composed of the retainer 6 and the rolling element 2, the outer raceway 19 and the inner raceway 20 are forced to be lubricated, so as to maintain the high-speed rotation of the solid shaft.

[0049] The other structures are the same as those in Example 2 or 3.

[0050] Embodiment 6, as Figure 6As shown, a self-excited oil mist spray lubrication high-speed bearing is used in a motor. The bearings described in Example 4 are arranged on both sides of the motor rotor 16. The bearings are deep groove ball bearings. The rotating shaft 12 and the two inner ring bodies 4 arranged on both sides of the motor rotor 16 form an inseparable solid shaft body. The solid shaft body and the outer ring sleeve 8 are arranged horizontally. The oil storage space 10 is a horizontal concave annular groove 24. The outer surface of the solid shaft body is provided with an inner raceway 20, and the inner surface of the outer ring sleeve 8 is provided with an outer raceway 19. The retainer 6 is installed on the solid shaft body. The side of the retainer 6 with a pocket hole is an open side 9. The open side 9 faces the horizontal concave annular groove 24. The open side 9 is an open structure that is conducive to directly receiving the lubricating oil spray. The pocket hole is provided with a rolling body 2, which is a sphere. The rolling body 2 matches the inner and outer raceways respectively. The inner hole of the motor rotor 16 matches and is fixedly connected to the outer surface of the solid shaft body, and the solid shaft body and the motor rotor 16 rotate synchronously. The outer rings 8 at both ends of the motor rotor need to ensure a certain degree of coaxiality during installation to prevent the solid shaft from scratching the adjacent components and hindering the rotation of the rotor. The lubricating oil enters the bearing from the lubrication hole 1 set on the upper part of the outer ring 8, flows through the outer surface of the inner ring body 4 and is stored in the horizontal concave annular groove 24. The lubricating oil motor rotor 16 is driven by the electromagnetic force of the motor, driving the rotating shaft 12 and the inner ring bodies 4 on both sides to rotate at high speed, and the air boundary layer on the outer surface of the inner ring body 4 also rotates at high speed, and continuously throws out high-energy airflow to impact the oil stored in the horizontal concave annular groove 24, forming a jet effect of high-energy oil particles flying around. A part of the high-energy oil particles are sprayed to the open side 9 of the cage, the rolling body 2 and the inner and outer raceways, and the friction pairs composed of the cage 6 and the rolling body 2, the outer raceway 19, and the inner raceway 20 are forced to lubricate, and the inner ring body 4 is maintained to rotate at high speed.

[0051] The other structures of the bearings on both sides of the motor rotor 16 are the same as those in Example 4.

[0052] Embodiment 7, as Figure 7As shown, a self-excited oil mist jet lubrication high-speed bearing, the outer ring sleeve 8 of the bearing is tilted or vertically arranged, the oil storage space 10 is a plurality of upwardly tilted inclined annular grooves 15, the angle of the upward tilt of the inclined annular groove 15 is 5°~85°, and the oil is not easy to overflow. The oil storage space 10 can also be used under horizontal working conditions. At least one inclined annular groove 15 is arranged on the inner wall of the outer ring sleeve 8, and the lubrication hole 1 is located at the upper part of the topmost inclined annular groove 15. When the lubricating oil is refueled through the lubrication hole 1, the lubricating oil should flow downward along the inner wall of the outer ring sleeve 8 and gradually fill all the inclined annular grooves 15. The inner ring body 4 is an integral solid shaft body that is inseparable from the rotating shaft 12. The outer surface of the solid shaft is provided with an inner raceway 20, and the outer ring sleeve is provided with an outer raceway 19. The retainer 6 is installed on the outer surface of the solid shaft, and the side of the retainer 6 with a pocket hole is an open side 9, and the open side 9 faces the inclined annular groove 15. The open side 9 is an open structure that is conducive to directly receiving the lubricating oil injection. The pocket hole is provided with a rolling body 2. The rolling body 2 is matched with the inner and outer raceways respectively. The inclined ring groove 15 and the retainer 6 are located between the two sealing components. The two ends of the solid shaft body can extend out of the outer ring sleeve 8 respectively and connect with other related units; or the tail of one end can be sealed as a whole inside the outer ring sleeve 8. When the solid shaft body rotates at high speed, the air boundary layer on the outer surface of the solid shaft body also rotates at high speed, and continuously throws out high-energy airflow to impact the oil stored in the inclined ring groove 15, forming a jet effect in which high-energy oil particles fly around. Some high-energy oil particles are sprayed toward the open side 9 of the retainer, the rolling body 2, the outer raceway 19 and the inner raceway 20, for forced lubrication, and the high-speed rotation of the solid shaft body. The high-speed rotation of the internal parts of the bearing and the high-speed air boundary layer continuously give the lubricating oil particles sufficient kinetic energy, and maintain most of the lubricating oil particles in high-speed motion inside the bearing. When the bearing stops rotating, the centrifugal force causes a considerable part of the lubricating oil to remain in the inclined ring groove 15.

[0053] The other structures are the same as those in Example 2 or 3.

[0054] Embodiment 8, as Figure 8As shown, a self-excited oil mist jet lubrication high-speed bearing is used in a motor. The bearings described in Example 7 are arranged on both sides of the motor rotor 16. The bearings are deep groove ball bearings. The rotating shaft 12 and the two inner ring bodies 4 arranged on both sides of the motor rotor 16 form an inseparable solid shaft body. The solid shaft body and the outer ring sleeve 8 are arranged tilted or vertically. The oil storage space 10 is an upwardly inclined inclined ring groove 15. The angle of the inclined ring groove 15 is 5°~85° upward, so that the oil is not easy to overflow. The oil storage space 10 can also be used under horizontal working conditions. The inner wall of the outer ring sleeve 8 is provided with a plurality of parallel inclined ring grooves 15, and the lubrication hole 1 is arranged at the top of all the inclined ring grooves 15. When the lubricating oil is added through the lubrication hole 1, the oil should flow downward along the inner wall of the outer ring sleeve 8 and gradually fill all the inclined ring grooves 15. The outer surface of the solid shaft body is provided with an inner raceway 20, and the inner surface of the outer ring sleeve 8 is provided with an outer raceway 19. The retainer 6 is installed on the solid shaft body, and the side of the retainer 6 with the pocket hole is the open side 9, and the open side 9 faces the horizontal concave annular groove 24, and the open side 9 is an open structure that is conducive to directly receiving the lubricating oil injection. The pocket hole is provided with a rolling body 2, and the rolling body 2 is a sphere, and the rolling body 2 is matched with the inner and outer raceways respectively. The inner hole of the motor rotor 16 is matched with the outer surface of the solid shaft body and fixedly connected, and the solid shaft body and the motor rotor 16 rotate synchronously. The outer ring sleeves 8 at both ends of the motor rotor need to ensure a certain coaxiality during installation to avoid the solid shaft body from scratching with adjacent components and hindering the rotation of the rotor. When in a vertical working condition, the rolling body 2 of each bearing is arranged below all inclined annular grooves 15 in the bearing.

[0055] The motor rotor 16 is driven by the electromagnetic force of the motor, driving the rotating shaft 12 and the inner ring bodies 4 on both sides to rotate at high speed. The air boundary layer on the outer surface of the inner ring body 4 also rotates at high speed, and continuously throws out high-energy airflow to impact the oil stored in the inclined ring groove 15, forming a jet effect in which high-energy oil particles fly everywhere. Some high-energy oil particles are sprayed toward the open side 9 of the retainer, the rolling element 2, the outer raceway 19 and the inner raceway 20 for forced lubrication to maintain the high-speed rotation of the inner ring body 4. The high-speed rotation of the internal parts of the bearing and the high-speed air boundary layer continuously give the lubricating oil particles sufficient kinetic energy to maintain most of the lubricating oil particles in high-speed motion inside the bearing. When the bearing stops rotating, the centrifugal force causes a considerable portion of the lubricating oil to remain in the inclined ring groove 15.

[0056] The other structures of the bearings on both sides of the motor rotor 16 are the same as those in Example 7.

[0057] Embodiment 9, as Fig. 9As shown, a self-excited oil mist jet lubrication high-speed bearing is an angular contact bearing, including an outer ring sleeve 8 and an inner ring body 4. The inner ring body 4 is a hollow separate sleeve. The inner ring body 4 is located inside the outer ring sleeve 8. The inner ring body 4 and the outer ring sleeve 8 are coaxially arranged horizontally. The two ends of the inner ring body 4 extend out of the outer ring sleeve 8 respectively. The inner surface of the outer ring sleeve 8 is provided with an outer raceway 19, and the outer surface of the inner ring body 4 is provided with an inner raceway 20. The rolling body 2 is matched with the outer raceway 19 and the inner raceway 20 respectively. The inner ring body 4 is pressed against the shaft shoulder 21, and the axial preload 22 acts on the end face 23 of the outer ring sleeve 8 so that the outer raceway 19 and the inner raceway 20 maintain a certain preload on the rolling body 2. The outer ring 8 and the inner ring body 4 are connected by a non-contact sealing component 3 to prevent the oil from overflowing. An oil storage space 10 is provided on the inner wall of the outer ring 8. The oil storage space 10 is a horizontal concave annular groove 24. The horizontal concave annular groove 24 is connected to the lubrication hole 1 set on the outer ring 8. A retainer 6 is provided on the outer surface of the inner ring body 4. The retainer 6 is evenly provided with semi-open pockets along the circumference. The side of the retainer 6 with pockets is an open side 9, and the open side 9 faces the horizontal concave annular groove 24. The open side 9 is an open structure that is conducive to directly receiving the injection of lubricating oil. A rolling body 2 is provided in the pocket, and the rolling body 2 is a sphere. The inner ring body 4 is a hollow single sleeve; the inner ring body 4 and the outer ring 8 are arranged horizontally. The two ends of the outer ring 8 are respectively connected with the inner ring body 4 through the sealing component 3, that is, the outer surface of the sealing component 3 and the inner ring 4 has a slit 11 to ensure the free rotation of the inner ring body. The horizontal concave annular groove 24 and the retainer 6 are located between the two sealing components 3. The lubricating oil enters the bearing from the lubrication hole 1 arranged on the upper part of the outer ring sleeve 8, flows through the outer surface of the inner ring body 4 and is stored in the horizontal concave annular groove 24. When the inner ring body 4 rotates at high speed, the air boundary layer on the outer surface of the inner ring body 4 also rotates at high speed, and continuously throws out high-energy airflow to impact the stored oil in the horizontal concave annular groove 24, forming a jet effect in which high-energy oil particles fly everywhere. A part of the high-energy oil particles are sprayed toward the open side 9 of the retainer, the rolling element 2 and the inner and outer raceways, and the friction pairs composed of the retainer 6 and the rolling element 2, the outer raceway 19 and the inner raceway 20 are forced to be lubricated, so as to maintain the high-speed rotation of the inner ring body 4.

[0058] The other structures are the same as those in Example 2 or 3.

[0059] Embodiment 10, as Fig.10As shown, a self-excited oil mist jet lubrication high-speed bearing is used in a motor. The bearings described in Example 9 are arranged on both sides of the motor rotor 16, and the bearings are angular contact bearings. The inner ring body 4 is a hollow single sleeve; the inner ring body 4 is arranged on both sides of the motor rotor 16 of the motor and is fixedly connected to the rotating shaft 12. The inner hole surface of the motor rotor 16 matches and is fixedly connected to the outer surface of the rotating shaft 12. The inner ring body 4, the rotating shaft 12 and the motor rotor 16 rotate synchronously; the inner ring body 4 and the outer ring sleeve 8 are arranged horizontally, the oil storage space 10 is a horizontal concave annular groove 24, the outer surface of the inner ring body 4 is provided with an inner raceway 20, the inner surface of the outer ring sleeve 8 is provided with an outer raceway 19, and the rolling body 2 matches the outer raceway 19 and the inner raceway 20 respectively. The inner ring body 4 is pressed on the shaft shoulder 21, and the axial preload 22 acts on the end face 23 of the outer ring sleeve 8 so that the outer raceway 19 and the inner raceway 20 maintain a certain preload on the rolling body 2. The cage 6 is mounted on the inner ring body 4. The side of the cage 6 with the pocket hole is the open side 9. The open side 9 faces the horizontal concave annular groove 24. The open side 9 is an open structure that is conducive to directly receiving the lubricating oil injection. The pocket hole is provided with a rolling body 2, which is a sphere. The rolling body 2 is matched with the inner and outer raceways respectively. The outer ring sleeves 8 at both ends of the motor rotor need to ensure a certain degree of coaxiality during installation to prevent the inner ring body 4 from scratching with adjacent components and hindering the rotation of the rotor.

[0060] For the angular contact bearing, the axial stress generated by the front bearing 27 on the rotating shaft 12 and the axial stress generated by the rear bearing 27a on the rotating shaft 12 are in opposite directions and cancel each other out.

[0061] The lubricating oil enters the bearing from the lubrication hole 1 arranged on the upper part of the outer ring sleeve 8, flows through the outer surface of the inner ring body 4 and is stored in the horizontal concave annular groove 24. The lubricating oil motor rotor 16 is driven by the electromagnetic force of the motor, driving the rotating shaft 12 and the inner ring bodies 4 on both sides to rotate at high speed. The air boundary layer on the outer surface of the inner ring body 4 also rotates at high speed, and continuously throws out high-energy airflow to impact the stored oil in the horizontal concave annular groove 24, forming a jet effect in which high-energy oil particles fly everywhere. A part of the high-energy oil particles are sprayed toward the open side 9 of the retainer, the rolling element 2 and the inner and outer raceways, and the friction pairs composed of the retainer 6 and the rolling element 2, the outer raceway 19 and the inner raceway 20 are forced to be lubricated, so as to maintain the high-speed rotation of the inner ring body 4.

[0062] The other structures of the bearings on both sides of the motor rotor 16 are the same as those in Example 9.

[0063] Embodiment 11, as Fig.11As shown, a self-excited oil mist jet lubrication high-speed bearing is used in a motor. The bearings described in Example 9 are arranged on both sides of the motor rotor 16, and the bearings are angular contact bearings. The rotating shaft 12 and the two inner ring bodies 4 arranged on both sides of the motor rotor 16 form an inseparable integral solid shaft body. The inner hole surface of the motor rotor 16 matches and is fixedly connected with the outer surface of the solid shaft body. The solid shaft body and the motor rotor 16 rotate synchronously; the solid shaft body and the outer ring sleeve 8 are arranged horizontally, the oil storage space 10 is a horizontal concave annular groove 24, the outer surface of the solid shaft body is provided with an inner raceway 20, the inner surface of the outer ring sleeve 8 is provided with an outer raceway 19, and the rolling body 2 matches the outer raceway 19 and the inner raceway 20 respectively. The axial preload 22 acts on the end face 23 of the outer ring sleeve 8 so that the outer raceway 19 and the inner raceway 20 maintain a certain preload on the rolling body 2. The cage 6 is mounted on the solid shaft. The side of the cage 6 with the pocket is the open side 9. The open side 9 faces the horizontal concave annular groove 24. The open side 9 is an open structure that is conducive to directly receiving the lubricating oil injection. The pocket is provided with a rolling body 2, which is a sphere. The rolling body 2 is matched with the inner and outer raceways respectively. The outer rings 8 at both ends of the motor rotor need to ensure a certain degree of coaxiality during installation to prevent the solid shaft from scratching the adjacent components and hindering the rotation of the rotor.

[0064] For the angular contact bearing, the axial stress generated by the front bearing 27 on the rotating shaft 12 and the axial stress generated by the rear bearing 27a on the rotating shaft 12 are in opposite directions and cancel each other out.

[0065] The lubricating oil enters the bearing from the lubrication hole 1 arranged on the upper part of the outer ring 8, flows through the outer surface of the solid shaft and is stored in the horizontal concave annular groove 24. The lubricating oil motor rotor 16 is driven by the electromagnetic force of the motor to drive the solid shaft to rotate at high speed. The air boundary layer on the outer surface of the solid shaft also rotates at high speed, and continuously throws out high-energy airflow to impact the stored oil in the horizontal concave annular groove 24, forming a jet effect in which high-energy oil particles fly everywhere. A part of the high-energy oil particles are sprayed toward the open side 9 of the retainer, the rolling element 2 and the inner and outer raceways, and the friction pairs composed of the retainer 6 and the rolling element 2, the outer raceway 19 and the inner raceway 20 are forced to be lubricated, so as to maintain the high-speed rotation of the solid shaft.

[0066] The other structures of the bearings on both sides of the motor rotor 16 are the same as those in Example 9.

[0067] Embodiment 12, as Fig.12As shown, a self-excited oil mist jet lubrication high-speed bearing, the bearing is an angular contact bearing, the outer ring sleeve 8 is tilted or vertically arranged, the oil storage space 10 is a plurality of upwardly tilted inclined annular grooves 15, the angle of the upward tilt of the inclined annular groove 15 is 5°~85°, and the oil is not easy to overflow. The oil storage space 10 can also be used under horizontal working conditions. At least one inclined annular groove 15 is provided on the inner wall of the outer ring sleeve 8, and the lubrication hole 1 is located at the upper part of the topmost inclined annular groove 15. When the lubricating oil is added through the lubrication hole 1, the lubricating oil should flow downward along the inner wall of the outer ring sleeve 8, and gradually fill all the inclined annular grooves 15. The inner ring body 4 is a hollow single sleeve body, the outer surface of the inner ring body 4 is provided with an inner raceway 20, the outer ring sleeve is provided with an outer raceway 19, and the rolling body 2 is matched with the outer raceway 19 and the inner raceway 20 respectively. The two ends of the inner ring body 4 extend out of the outer ring sleeve 8 respectively, and the inner ring body 4 is pressed against the shaft shoulder 21. The axial preload 22 acts on the end face 23 of the outer ring sleeve 8 so that the outer raceway 19 and the inner raceway 20 maintain a certain preload on the rolling element 2. The retainer 6 is installed on the outer surface of the inner ring body 4. The side of the retainer 6 with the pocket hole is the open side 9, which faces the inclined ring groove 15. The open side 9 is an open structure that is conducive to directly receiving the lubricating oil injection. The rolling element 2 is arranged in the pocket hole. The rolling element 2 is matched with the inner and outer raceways respectively. The inclined ring groove 15 and the retainer 6 are located between the two sealing components. When the inner ring 4 of the bearing rotates at high speed, the air boundary layer on the outer surface of the inner ring 4 also rotates at high speed, and continuously throws out high-energy airflow to impact the oil stored in the inclined ring groove 15, forming a jet effect in which high-energy oil particles fly everywhere. Some high-energy oil particles are sprayed toward the open side 9 of the retainer, the rolling elements 2, the outer raceway 19 and the inner raceway 20 for forced lubrication to maintain the high-speed rotation of the inner ring 4. The high-speed rotation of the internal parts of the bearing and the high-speed air boundary layer continuously give the lubricating oil particles sufficient kinetic energy to maintain most of the lubricating oil particles in high-speed motion inside the bearing. When the bearing stops rotating, the centrifugal force causes a considerable portion of the lubricating oil to remain in the inclined ring groove 15.

[0068] The other structures are the same as those in Example 7.

[0069] Embodiment 13, as Fig.13As shown, a self-excited oil mist jet lubrication high-speed bearing is used in a motor. The bearings described in Example 12 are arranged on both sides of the motor rotor 16. The bearings are angular contact bearings. The inner ring body 4 is a hollow single sleeve; the inner ring body 4 is placed on both sides of the motor rotor 16 of the motor and is fixedly connected to the rotating shaft 12. The inner hole surface of the motor rotor 16 matches and is fixedly connected to the outer surface of the rotating shaft 12. The inner ring body 4, the rotating shaft 12 and the motor rotor 16 rotate synchronously; the inner ring body 4 and the outer ring sleeve 8 are tilted or vertically arranged, and the oil storage space 10 is an upwardly inclined inclined ring groove 15. The angle of the inclined ring groove 15 is 5°~85°, and the oil is not easy to overflow. The oil storage space 10 can also be used under horizontal working conditions. A plurality of parallel inclined ring grooves 15 are arranged on the inner wall of the outer ring sleeve 8, and the lubrication hole 1 is arranged at the top of all the inclined ring grooves 15. When the lubricating oil is added through the lubrication hole 1, the oil should flow downward along the inner wall of the outer ring sleeve 8 and gradually fill all the inclined ring grooves 15. The outer surface of the inner ring body 4 is provided with an inner raceway 20, and the inner surface of the outer ring sleeve 8 is provided with an outer raceway 19. The retainer 6 is installed on the solid shaft body, and the side of the retainer 6 with the pocket hole is the open side 9, and the open side 9 faces the horizontal concave annular groove 24, and the open side 9 is an open structure that is conducive to directly receiving the lubricating oil injection. The pocket hole is provided with a rolling body 2, and the rolling body 2 is a sphere, and the rolling body 2 is respectively matched with the inner and outer raceways. The outer ring sleeves 8 at both ends of the motor rotor need to ensure a certain coaxiality during installation to avoid the solid shaft body from scratching the adjacent components and hindering the rotation of the rotor. When in an inclined or vertical working condition, the rolling body 2 of each bearing is arranged below all the inclined annular grooves 15 in the bearing.

[0070] For the angular contact bearing, the axial stress generated by the front bearing 27 on the rotating shaft 12 and the axial stress generated by the rear bearing 27a on the rotating shaft 12 are in opposite directions and cancel each other out.

[0071] The motor rotor 16 is driven by the electromagnetic force of the motor, driving the rotating shaft 12 and the inner ring bodies 4 on both sides to rotate at high speed. The air boundary layer on the outer surface of the inner ring body 4 also rotates at high speed, and continuously throws out high-energy airflow to impact the oil stored in the inclined ring groove 15, forming a jet effect in which high-energy oil particles fly everywhere. Some high-energy oil particles are sprayed toward the open side 9 of the retainer, the rolling element 2, the outer raceway 19 and the inner raceway 20 for forced lubrication to maintain the high-speed rotation of the inner ring body 4. The high-speed rotation of the internal parts of the bearing and the high-speed air boundary layer continuously give the lubricating oil particles sufficient kinetic energy to maintain most of the lubricating oil particles in high-speed motion inside the bearing. When the bearing stops rotating, the centrifugal force causes a considerable portion of the lubricating oil to remain in the inclined ring groove 15.

[0072] The other structures of the bearings on both sides of the motor rotor 16 are the same as those in Example 12.

[0073] Embodiment 14, as Fig.14As shown, a self-excited oil mist jet lubrication high-speed bearing is used in a motor. The bearings described in Example 12 are arranged on both sides of the motor rotor 16, and the bearings are angular contact bearings. The rotating shaft 12 and the two inner ring bodies 4 arranged on both sides of the motor rotor 16 form an inseparable solid shaft body. The inner hole surface of the motor rotor 16 matches and is fixedly connected to the outer surface of the solid shaft body. The solid shaft body and the motor rotor 16 rotate synchronously; the solid shaft body and the outer ring sleeve 8 are inclined or vertically arranged, and the oil storage space 10 is an upwardly inclined inclined ring groove 15. The angle of the inclined ring groove 15 upwardly inclined is 5°~85°, so that the oil is not easy to overflow. The oil storage space 10 can also be used under horizontal working conditions. A plurality of parallel inclined ring grooves 15 are arranged on the inner wall of the outer ring sleeve 8, and the lubrication hole 1 is arranged at the top of all the inclined ring grooves 15. When the lubricating oil is added through the lubrication hole 1, the oil should flow downward along the inner wall of the outer ring sleeve 8 and gradually fill all the inclined ring grooves 15. The outer surface of the solid shaft body is provided with an inner raceway 20, and the inner surface of the outer ring sleeve 8 is provided with an outer raceway 19. The retainer 6 is installed on the solid shaft body, and the side of the retainer 6 with the pocket hole is the open side 9, and the open side 9 faces the horizontal concave annular groove 24, and the open side 9 is an open structure that is conducive to directly receiving the lubricating oil injection. The pocket hole is provided with a rolling body 2, and the rolling body 2 is a sphere, and the rolling body 2 is respectively matched with the inner and outer raceways. The outer ring sleeves 8 at both ends of the motor rotor need to ensure a certain coaxiality during installation to avoid the solid shaft body from scratching the adjacent components and hindering the rotation of the rotor. When in an inclined or vertical working condition, the rolling body 2 of each bearing is arranged below all the inclined annular grooves 15 in the bearing.

[0074] For the angular contact bearing, the axial stress generated by the front bearing 27 on the solid shaft body is in opposite directions to the axial stress generated by the rear bearing 27a on the solid shaft body, and they cancel each other out.

[0075] The motor rotor 16 is driven by the electromagnetic force of the motor to drive the solid shaft to rotate at high speed. The air boundary layer on the outer surface of the solid shaft also rotates at high speed, and continuously throws out high-energy airflow to impact the oil stored in the inclined ring groove 15, forming a jet effect in which high-energy oil particles fly everywhere. Some high-energy oil particles are sprayed toward the open side 9 of the retainer, the rolling element 2, the outer raceway 19 and the inner raceway 20 for forced lubrication to maintain the high-speed rotation of the solid shaft. The high-speed rotation of the internal parts of the bearing and the high-speed air boundary layer continuously give the lubricating oil particles sufficient kinetic energy to maintain most of the lubricating oil particles in high-speed motion inside the bearing. When the bearing stops rotating, the centrifugal force causes a considerable portion of the lubricating oil to remain in the inclined ring groove 15.

[0076] The other structures of the bearings on both sides of the motor rotor 16 are the same as those in Example 12.

[0077] For Example 1 to Example 14, the same self-excited oil mist jet lubrication high-speed bearing lubrication method is used, including the following steps:

[0078] S1: Lubricating oil periodically enters between the outer ring 8 and the inner ring body 4 from the lubrication hole 1 provided on the outer ring 8 and is stored in the oil storage space 10;

[0079] S2: When the inner ring body 4 rotates at high speed, the air boundary layer on the outer surface of the inner ring body 4 also rotates at high speed, and continuously throws out high-energy airflow to impact the oil stored in the oil storage space 10, forming a self-excited jet lubrication effect in which high-energy oil particles fly around. A part of the high-energy oil particles are sprayed at high speed toward the open side 9 of the cage 6, the rolling element 2, and the inner and outer raceways, forcibly lubricating the friction pairs composed of the cage 6 and the rolling element 2, the outer raceway 19, and the inner raceway 20, thereby maintaining the high-speed rotation of the inner ring body 4;

[0080] S3: In step S2, when the inner ring body 4 rotates at a high speed, the sealing component 3 generates an eddy current sealing effect at the slit 11 adjacent to the outer surface of the inner ring body 4 to seal the oil.

[0081] In step S1, the lubricating oil periodically enters between the outer ring 8 and the inner ring body 4. It must be ensured that when the bearing is stationary, sufficient lubricating oil is retained in the oil storage space 10 and the lubricating oil does not overflow from the slit 11 between the sealing assembly 3 and the inner ring body 4, so as to maintain the self-excited jet lubrication effect when the bearing runs at high speed.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-excited oil mist jet lubrication high-speed bearing, characterized in that: The invention comprises an outer ring sleeve (8) and an inner ring body (4), the two ends of the outer ring sleeve (8) are connected to the inner ring body (4) via a non-contact type sealing component (3), an oil storage space (10) and a retaining frame (6) are provided between the outer ring sleeve (8) and the inner ring body (4), the oil storage space (10) and the retaining frame (6) are located between the two sealing components (3), at least one ring of rolling elements (2) is provided on the retaining frame (6), and the oil storage space (10) corresponds to a side of the retaining frame (6) on which the rolling elements (2) are provided; A lubrication hole (1) is provided on the wall of the outer ring (8), and the lubrication hole (1) is connected to the oil storage space (10); The sealing assembly (3) comprises an inner flat gasket (3-1), an outer flat gasket (3-4) and a special-shaped sealing member (3-2); the special-shaped sealing member (3-2) is located between the inner flat gasket (3-1) and the outer flat gasket (3-4); an O-type sealing ring (3-3) is provided between the special-shaped sealing member (3-2) and the outer ring sleeve (8); a retaining ring (3-6) is provided at the outer end of the outer flat gasket (3-4); the retaining ring (3-6) is fixed between the outer ring sleeve (8) and the inner ring body (4) by a retaining spring (3-5); Alternatively, the sealing assembly (3) comprises a gap sealing body (3-7), the gap sealing body (3-7) being fixed between an outer ring sleeve (8) and an inner ring body (4) via a retaining spring (3-5), an O-type sealing ring (3-3) being provided between the gap sealing body (3-7) and the outer ring sleeve (8), and an oil groove (3-8) being provided on the inner side surface of the gap sealing body (3-7) opposite to the inner ring body (4); When the outer ring (8) is arranged horizontally, the oil storage space (10) is a horizontal concave annular groove (24), and the horizontal concave annular groove (24) is arranged on the inner wall of the outer ring (8); When the outer ring (8) is tilted or vertically arranged, the oil storage space (10) is an upwardly opening tilted annular groove (15), and the tilted annular groove (15) is arranged on the inner wall of the outer ring (8); the tilted annular groove (15) is tilted upward at an angle of 5° to 85°; Lubricating oil periodically enters between the outer ring sleeve (8) and the inner ring body (4) from the lubrication hole (1) and is stored in the oil storage space (10); when the inner ring body (4) rotates at a high speed, the air boundary layer on the outer surface of the inner ring body (4) also rotates at a high speed, and continuously throws out high-energy airflow to impact the stored oil in the oil storage space (10), forming a self-excited jet lubrication effect in which high-energy oil particles fly around. A part of the high-energy oil particles are sprayed at a high speed toward the open side (9) of the retainer, the rolling element (2) and the inner and outer raceways, forcibly lubricating the friction pairs composed of the retainer (6) and the rolling element (2), the outer raceway (19) and the inner raceway (20), thereby maintaining the high-speed rotation of the inner ring body (4); when the inner ring body (4) rotates at a high speed, a vortex sealing effect is generated at the slit (11) adjacent to the outer surface of the sealing component (3) and the inner ring body (4), thereby sealing the oil.

2. The self-excited oil mist jet lubrication high-speed bearing according to claim 1, characterized in that: The retaining frame (6) is provided with a semi-open pocket for positioning the rolling body (2); the side of the retaining frame (6) on which the pocket is provided is an open side (9), and the open side (9) faces the oil storage space (10).

3. The self-excited oil mist jet lubrication high-speed bearing according to claim 1 or 2, characterized in that: An outer raceway (19) is provided on the inner wall of the outer ring sleeve (8), an inner raceway (20) is provided on the outer wall of the inner ring body (4), and the rolling body (2) is matched with the outer raceway (19) and the inner raceway (20) respectively.

4. The self-excited oil mist jet lubrication high-speed bearing according to claim 1, characterized in that: The inner ring body (4) is a hollow single sleeve body or forms an inseparable integral solid shaft body together with the rotating shaft (12); the rolling body (2) is a sphere or a cylinder or a conical cylinder or a spherical roller.

5. The self-excited oil mist jet lubrication high-speed bearing according to claim 1, characterized in that: At least one inclined annular groove (15) is provided on the inner wall of the outer ring sleeve (8), and the lubrication hole (1) is located at the upper part of the topmost inclined annular groove (15).

6. A lubrication method for a self-excited oil mist jet lubrication high-speed bearing as claimed in claim 1, 2, 4 or 5, characterized in that: The steps include: S1: Lubricating oil periodically enters between the outer ring (8) and the inner ring body (4) from a lubricating hole (1) provided on the outer ring (8) and is stored in the oil storage space (10); S2: When the inner ring (4) rotates at a high speed, the air boundary layer on the outer surface of the inner ring (4) also rotates at a high speed, and continuously throws out high-energy airflow to impact the oil stored in the oil storage space (10), forming a self-excited jet lubrication effect in which high-energy oil particles fly around. A part of the high-energy oil particles are sprayed at high speed toward the open side (9) of the cage, the rolling element (2), and the inner and outer raceways, forcibly lubricating the friction pairs composed of the cage (6) and the rolling element (2), the outer raceway (19), and the inner raceway (20), thereby maintaining the high-speed rotation of the inner ring (4); S3: In step S2, when the inner ring body (4) rotates at a high speed, a vortex sealing effect is generated at the slit (11) adjacent to the outer surface of the sealing component (3) and the inner ring body (4), thereby sealing the oil.

7. The lubrication method for a self-excited oil mist jet lubrication high-speed bearing according to claim 6, characterized in that: In step S1, lubricating oil periodically enters between the outer ring (8) and the inner ring body (4), and it must be satisfied that when the bearing is stationary, sufficient lubricating oil is retained in the oil storage space (10), and the lubricating oil does not overflow from the slit (11) between the sealing component (3) and the inner ring body (4), so as to maintain the occurrence of the self-excited jet lubrication effect when the bearing runs at high speed.

8. Application of the self-excited oil mist jet lubrication high-speed bearing in a motor according to claim 1 or 5, characterized in that: When the inner ring body (4) is a hollow separate sleeve, the inner ring body (4) is disposed on both sides of the motor rotor (16) of the motor and is fixedly connected to the rotating shaft (12); the inner hole surface of the motor rotor (16) matches and is fixedly connected to the outer surface of the rotating shaft (12); the inner ring body (4), the rotating shaft (12) and the motor rotor (16) rotate synchronously; when the inner ring body (4) is an inseparable part of the solid shaft body, the inner ring body (4) is disposed on both sides of the motor rotor (16); the inner ring body (4) and the rotating shaft (12) are an inseparable integral part; the inner hole surface of the motor rotor (16) matches and is fixedly connected to the outer surface of the rotating shaft (12); the inner ring body (4), the rotating shaft (12) and the motor rotor (16) rotate synchronously.

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