CN115325034B - High-speed rolling bearing sealing structure with fluid self-pumping effect - Google Patents
High-speed rolling bearing sealing structure with fluid self-pumping effect Download PDFInfo
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- CN115325034B CN115325034B CN202210979334.2A CN202210979334A CN115325034B CN 115325034 B CN115325034 B CN 115325034B CN 202210979334 A CN202210979334 A CN 202210979334A CN 115325034 B CN115325034 B CN 115325034B
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- inner ring
- rolling bearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/762—Sealings of ball or roller bearings by means of a fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
- F16C33/7806—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for spherical roller bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
- F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing lips
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
- F16C33/7826—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of the opposing surface cooperating with the seal, e.g. a shoulder surface of a bearing ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
- F16C37/007—Cooling of bearings of rolling bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a high-speed rolling bearing sealing structure with a fluid self-pumping effect, which comprises an outer ring, an inner ring, a sealing ring, rolling bodies and a retainer, wherein the inner ring is arranged inside the outer ring, the inner ring is sequentially provided with a plurality of backward bending spiral grooves, a sealing dam and an inner ring sealing groove which are uniformly and alternately arranged around a bearing central axis from the outer diameter to the inner diameter along the radial direction, the area between two adjacent backward bending spiral grooves is formed into a sealing weir, the direction of a fluid outlet of the backward bending spiral groove is opposite to the direction of the inner ring, the sealing ring is in sealing connection with the outer side edges of the outer ring and the inner ring, the sealing ring comprises a nitrile rubber outer layer and a steel skeleton inner layer, and a current collecting ring groove communicated with the backward bending spiral groove is arranged on the steel skeleton inner layer and extends around the bearing central axis.
Description
Technical Field
The invention relates to the technical field of bearing sealing, in particular to a high-speed rolling bearing sealing structure with a fluid self-pumping effect.
Background
The rolling bearing is an industrial base part, and the operation reliability of the rolling bearing is a key link for ensuring the limit working capacity, the operation precision, the stability and the service life of complex mechanical systems such as aerospace, weaponry, precision machine tools and the like. Currently, in some applications, sealing failure of the bearing severely affects the normal operation and service life of the bearing.
The sealing of the bearing can be divided into a self-contained sealing type and an externally-added sealing type. The self-contained seal is to manufacture the bearing itself as a part with a sealing function; the external sealing is to design sealing devices with various forms outside the bearing, and the sealing method is divided into a non-contact type sealing device and a contact type sealing device.
A non-contact seal is one in which the seal is not in contact with its relatively moving parts and has a proper clearance.
In the prior art, annular grooves with hook-shaped sections are formed in two sides of an inner ring of the non-contact bearing, and lips of a sealing ring extend into the annular grooves and form clearance fit with inner walls of the annular grooves, so that contact friction between the sealing ring and the inner ring is avoided, and meanwhile, the non-contact bearing has certain dustproof and antifouling capabilities, such as a non-contact sealing structure for a bearing disclosed in Chinese patent application No. CN 202021755899.5. However, because the shape of the hooked ring groove is complex, the roughness and ellipticity of the bottom surface of the groove are difficult to control, and the generated machining error is larger; and when the bearing runs at a high speed, the lip part of the sealing ring can swing, so that a contact state is formed between the inner wall of the ring groove and the sealing ring easily, thereby generating larger friction moment and accelerating the failure of the sealing.
A contact seal is a seal in which the seal contacts a relatively moving part and has no clearance. In the prior art, the contact bearing has certain dustproof and antifouling capacity due to interference fit between the inner ring and the lip of the sealing ring, and has good sealing performance. A double seal bearing as disclosed in chinese patent application No. CN 201420172200.0. However, when the bearing runs at a high speed, the friction moment of the bearing is increased due to the direct contact between the inner ring and the sealing lip, the friction temperature is excessively increased, the lubrication effect is reduced, the abrasion of the sealing element is increased, the sealing failure is caused, and the service life of the bearing is shortened.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the invention, which should not be used to limit the scope of the invention.
The present invention has been made in view of the above-mentioned and/or existing problems with rolling bearings.
It is therefore an object of the present invention to provide a high speed rolling bearing seal arrangement with fluid self-pumping effect which will allow the bearing to operate at high speeds, yet still have good sealing properties and low friction torque effects.
In order to solve the technical problems, according to one aspect of the present invention, the following technical solutions are provided:
a high speed rolling bearing seal structure with fluid self-pumping effect, comprising:
an outer ring;
the inner ring is arranged inside the outer ring, and sequentially provided with a plurality of backward bending type spiral grooves, a sealing dam and an inner ring sealing groove which are uniformly arranged at intervals around the central axis of the bearing from the outer diameter to the inner diameter along the radial direction, wherein a region between two adjacent backward bending type spiral grooves is formed into a sealing dam, and the direction of a fluid outlet of the backward bending type spiral groove is opposite to the direction of the inner ring;
the sealing ring is in sealing connection with the outer side edges of the outer ring and the inner ring, the sealing ring comprises a nitrile rubber outer layer and a steel skeleton inner layer, a flow collecting ring groove communicated with the backward bending type spiral groove is arranged on the steel skeleton inner layer, the flow collecting ring groove extends around the central axis of the bearing, a plurality of flow guiding channels are arranged in the ring body of the steel skeleton inner layer, a flow guiding inlet hole of each flow guiding channel is positioned at the outer diameter of the end face of the steel skeleton inner layer, a flow guiding outlet hole of each flow guiding channel is positioned in the flow collecting ring groove, and the flow guiding channels are communicated with the sealing cavity;
the rolling bodies are uniformly arranged between the outer ring and the inner ring;
the retainer is arranged on two sides of the rolling body, so that the rolling body outer ring and the rolling body inner ring are uniformly distributed.
As a preferable mode of the high-speed rolling bearing sealing structure with the fluid self-pumping effect according to the invention, the backward curved spiral groove has two inner sides arranged in the circumferential direction, wherein one inner side is an inner convex side protruding toward the inside of the backward curved spiral groove, and the other inner side is an inner concave side recessed toward the outside of the backward curved spiral groove.
As a preferable scheme of the high-speed rolling bearing sealing structure with the fluid self-pumping effect, two inner side groove wall molded lines of the backward bending type spiral groove are spiral lines, and the spiral lines of the two inner side groove wall molded lines have the same spiral angle.
As a preferable mode of the high-speed rolling bearing sealing structure with the fluid self-pumping effect, the flow collecting ring groove is positioned at the radial inner side part of the backward bending type spiral groove.
As a preferable scheme of the high-speed rolling bearing sealing structure with the fluid self-pumping effect, the part, connected with the inner ring, of the sealing ring is provided with an inner lip, the inner ring is provided with an inner ring sealing groove, the inner lip is clamped into the inner ring sealing groove, and the inner lip is in clearance fit with the inner ring sealing groove.
As a preferable scheme of the high-speed rolling bearing sealing structure with the fluid self-pumping effect, the part, connected with the outer ring, of the sealing ring is provided with an outer ring sealing groove, the outer ring is clamped into the outer ring sealing groove, and the outer ring sealing groove is in clearance fit with the outer ring sealing groove.
As a preferable mode of the high-speed rolling bearing sealing structure with fluid self-pumping effect according to the invention, the outer lip is provided with a -shaped decompression groove.
Compared with the prior art, the invention has the following beneficial effects:
1. in the process that the lubricating oil flows into the sealing cavity from the backward bending type spiral groove, according to energy conservation, the relative speed of the flowing of the lubricating oil is reduced due to the expansion of the flowing section of the backward bending type spiral groove, the kinetic energy difference caused by the reduction of the speed of the lubricating oil and the work done by the backward bending type spiral groove on the lubricating oil are converted into kinetic energy and fluid dynamic pressure which are formed by the increase of the dragging speed. The hydrostatic pressure in the backward bending type spiral groove and the dynamic pressure gradually rising from the groove root to the outer diameter form an opening force for pushing the inner ring and the sealing ring to be separated, so that friction and temperature rise between the inner ring and the sealing ring during high-speed running of the bearing are reduced, the failure of the sealing ring is avoided, and the service life of the bearing is further prolonged.
2. The pressure fluid barrier formed by pumping fluid with gradually increased pressure and fluid film shear flow rotating along with the inner ring from the groove root of the backward bending spiral groove to the outlet and the combined action of the sealing dam resistance make the lubricating oil in the sealing cavity difficult to leak out of the bearing, thereby realizing sealing.
3. The inner diameter lip of the sealing ring is clamped into the sealing groove of the inner ring, and the inner diameter lip and the sealing groove are in clearance fit, so that the clearance is small, and the leakage of lubricating oil can be reduced while the entering of magazines such as external dust and the like can be prevented. In addition, the clearance fit between the two parts greatly reduces friction and abrasion, prolongs the service life of the bearing, and the -shaped pressure reducing groove arranged on the outer lip of the sealing ring can improve the compression resistance and the service life of the sealing ring.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following detailed description will be given with reference to the accompanying drawings and detailed embodiments, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained from these drawings without inventive faculty for a person skilled in the art. Wherein:
FIG. 1 is a schematic illustration of a high speed rolling bearing seal arrangement with fluid self-pumping effect in accordance with the present invention;
FIG. 2 is a schematic view of a seal ring in a high-speed rolling bearing seal structure with fluid self-pumping effect according to the present invention;
FIG. 3 is a schematic view of the inner ring of a high-speed rolling bearing seal structure with fluid self-pumping effect according to the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 1 showing a seal configuration of a high-speed rolling bearing with fluid self-pumping effect according to the present invention;
FIG. 5 is an enlarged view of portion B of FIG. 1 of a seal structure of a high-speed rolling bearing with fluid self-pumping effect according to the present invention;
FIG. 6 is a perspective view of an inner race of a high-speed rolling bearing seal arrangement with fluid self-pumping effect in accordance with the present invention;
fig. 7 is a perspective view of a seal ring of a high-speed rolling bearing seal structure with fluid self-pumping effect according to the present invention.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings.
Next, the present invention will be described in detail with reference to the drawings, wherein the sectional view of the device structure is not partially enlarged to general scale for the convenience of description, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The invention provides a high-speed rolling bearing sealing structure with a fluid self-pumping effect, which can ensure that the bearing has good sealing performance and low friction torque effect when running at a high speed.
Fig. 1 to 7 are schematic structural views showing an embodiment of a high-speed rolling bearing seal structure with fluid self-pumping effect according to the present invention, referring to fig. 1 to 7, a main body portion of the high-speed rolling bearing seal structure with fluid self-pumping effect includes an outer ring 1, an inner ring 3, a seal ring 2, rolling bodies 4 and a cage 5.
The outer ring 1 is an outer ring member of the high-speed rolling bearing seal structure having a fluid self-pumping effect.
The inner ring 3 is disposed inside the outer ring 1, and has a plurality of backward curved spiral grooves 31, sealing dams 32 and an inner ring sealing groove 34 which are disposed at regular intervals around the central axis of the bearing in order from the outer diameter to the inner diameter in the radial direction, wherein the region between two adjacent backward curved spiral grooves 31 is formed as a sealing dam 33, and the direction of the fluid outlet of the backward curved spiral groove 31 is opposite to the direction of the inner ring 3, the backward curved spiral groove 31 has two inner side surfaces disposed in the circumferential direction, one of the inner side surfaces is an inner convex side surface 311 protruding toward the inside of the backward curved spiral groove 31, the other inner side surface is an inner concave side surface 312 recessed toward the outside of the backward curved spiral groove 31, the two inner side surface groove wall profiles of the backward curved spiral groove 31 are spiral lines, and the spiral lines of the two inner side groove wall profiles have the same spiral angle.
The sealing ring 2 is in sealing connection with the outer side edges of the outer ring 1 and the inner ring 3, the sealing ring 2 comprises a nitrile rubber outer layer 21 and a steel skeleton inner layer 22, so that the corrosion resistance and vibration resistance of the sealing ring are greatly improved, a flow collecting ring groove 25 communicated with a backward bending type spiral groove 31 is arranged on the steel skeleton inner layer 22, the flow collecting ring groove 25 extends around a bearing central axis, a plurality of flow guiding channels 23 are arranged in a ring body of the steel skeleton inner layer 22, a flow guiding inlet hole 24 of each flow guiding channel 23 is positioned at the outer diameter of the end face of the steel skeleton inner layer 22, a flow guiding outlet hole 26 of each flow guiding channel 23 is positioned in the flow collecting ring groove 25, the flow guiding channels 23 are communicated with a sealing cavity, and the flow collecting ring groove 25 is positioned at the radial inner side part of the backward bending type spiral groove 31.
1-7, when the high-speed rolling bearing sealing structure with the fluid self-pumping effect is used, and the inner ring 3 rotates in the arrow direction in FIG. 3, the bearing sealing structure is pump-out type, and lubricating oil in the backward bending type spiral groove 31 does work, so that the pressure of the lubricating oil is improved, and the speed of the lubricating oil is improved; under the action of high-speed centrifugal force, the lubricating oil flows tangentially to the outer diameter side of the bearing along the contour line of the groove surface and is pumped out of the backward curved spiral groove 31 and returns to the bearing seal cavity. In the process of flowing from the root of the backward bending type spiral groove 31 to the outer diameter, the dragging speed is gradually increased, the flow section of the backward bending type spiral groove 31 is also enlarged, and the relative speed of the flowing of the lubricating oil is gradually reduced; the kinetic energy difference caused by the reduction of the fluid speed and the work done by the backward bending spiral groove 31 on the lubricating oil are converted into kinetic energy and fluid dynamic pressure which are formed by the increase of the traction speed, the fluid static pressure in the backward bending spiral groove 31 and the dynamic pressure which gradually rises from the groove root to the outer diameter form the opening force of the end faces of the inner ring 3 and the sealing ring 2, so that the friction and the temperature rise between the inner ring 3 and the sealing ring 2 during the high-speed running of the bearing are reduced, and the service life of the bearing is further prolonged. The pressure fluid barrier formed by the pumped fluid with gradually increased pressure from the groove root of the backward bending type spiral groove 31 to the outer diameter and the shearing flow of the fluid film rotating with the follow-up ring and the resistance of the sealing dam 32 make the fluid in the sealing cavity difficult to leak to the inner diameter side of the sealing surface to obtain tightness, after the lubricating oil at the root of the backward bending type spiral groove 31 pumps and flows out to the outer diameter side, the pressure in the area at the groove root of the backward bending type spiral groove is reduced, the lubricating oil in the sealing cavity is pressed into the collecting ring groove 25 through the diversion inlet hole 24, the diversion channel 23 and the diversion outlet hole 26 due to the pressure difference effect, flows into the root of the backward bending type spiral groove 31 again, and then the groove surface of the backward bending type spiral groove 31 acts as work to accelerate the high-speed fluid, flows along the tangential direction of the working surface to the outer diameter side of the inner ring 3 to pump into the sealing cavity under the centrifugal force, and the self-pumping circulation is formed.
In a rotary working state, the self-pumping sealing structure of the bearing has dynamic response capability, when a sealing system is disturbed, a sealing gap fluctuates, the sealing gap becomes smaller, the end face fluid film pressure becomes obviously larger, and the opening force becomes larger; the sealing gap is enlarged, the end face fluid film pressure is obviously reduced, the opening force is reduced, and the sealing gap is balanced.
Further, referring to fig. 1, 4 and 5, the portion of the sealing ring 2 connected with the inner ring 3 is provided with an inner lip 29, the inner ring 3 is provided with an inner ring sealing groove 34, the inner lip 29 is clamped into the inner ring sealing groove 34, and the inner lip 29 is in clearance fit with the inner ring sealing groove 34, so that on one hand, leakage of internal lubricating oil can be prevented, and on the other hand, the sealing performance is improved, the inside of the bearing can be isolated from the outside, and foreign matters and dust outside can be prevented from entering the inside of the bearing; and the clearance fit between the two greatly reduces friction and wear, and improves the high-speed running efficiency of the bearing. The sealing washer 2 has outer lip 27 with the position that outer lane 1 is connected, and outer lane 1 has outer lane seal groove 11, and outer lip 27 card goes into in outer lane seal groove 11 to outer lip 27 and outer lane seal groove 11 clearance fit, through the axial interference with outer lane seal groove 11 fix sealing washer 2, in addition, sealing washer outer lip 27 has set up shape decompression groove 28, can improve the resistance to compression and the life of sealing washer.
Although the invention has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the features of the disclosed embodiments may be combined with each other in any manner as long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of omitting the descriptions and saving resources. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (7)
1. A high speed rolling bearing seal structure having a fluid self-pumping effect, comprising:
an outer ring (1);
an inner ring (3) arranged inside the outer ring (1), wherein the inner ring (3) is sequentially provided with a plurality of backward bending spiral grooves (31), a sealing dam (32) and an inner ring sealing groove (34) which are uniformly arranged at intervals around the central axis of the bearing from the outer diameter to the inner diameter along the radial direction, the area between two adjacent backward bending spiral grooves (31) is formed into a sealing dam (33), and the direction of a fluid outlet of the backward bending spiral groove (31) is opposite to the direction of the inner ring (3);
the sealing ring (2) is in sealing connection with the outer side edges of the outer ring (1) and the inner ring (3), the sealing ring (2) comprises a nitrile rubber outer layer (21) and a steel skeleton inner layer (22), a flow collecting ring groove (25) communicated with a backward bending type spiral groove (31) is arranged on the steel skeleton inner layer (22), the flow collecting ring groove (25) extends around the central axis of the bearing, a plurality of flow guiding channels (23) are arranged in the ring body of the steel skeleton inner layer (22), a flow guiding inlet hole (24) of each flow guiding channel (23) is positioned at the outer diameter of the end face of the steel skeleton inner layer (22), a flow guiding outlet hole (26) of each flow guiding channel (23) is positioned in the flow collecting ring groove (25), and the flow guiding channels (23) are communicated with the sealing cavity;
the rolling bodies (4) are uniformly arranged between the outer ring (1) and the inner ring (3);
the retainers (5) are arranged on two sides of the rolling bodies (4) so that the rolling bodies (4) are uniformly distributed between the outer ring (1) and the inner ring (3).
2. A high-speed rolling bearing sealing structure with fluid self-pumping effect according to claim 1, characterized in that the backward curved spiral groove (31) has two circumferentially arranged inner sides, one of which is an inner convex side (311) protruding toward the inside of the backward curved spiral groove (31) and the other inner side is an inner concave side (312) recessed toward the outside of the backward curved spiral groove (31).
3. A high speed rolling bearing seal arrangement with fluid self pumping effect according to claim 2, characterized in that both inner side groove wall lines of the backward curved spiral groove (31) are spiral lines and the spiral lines of both inner side groove wall lines have the same spiral angle.
4. A high-speed rolling bearing sealing structure with fluid self-pumping effect according to claim 3, characterized in that the collecting ring groove (25) is located at the radially inner side of the backward curved spiral groove (31).
5. A high-speed rolling bearing sealing structure with fluid self-pumping effect according to claim 1, characterized in that the part of the sealing ring (2) connected with the inner ring (3) is provided with an inner lip (29), the inner ring (3) is provided with an inner ring sealing groove (34), the inner lip (29) is clamped into the inner ring sealing groove (34), and the inner lip (29) is in clearance fit with the inner ring sealing groove (34).
6. A high-speed rolling bearing sealing structure with fluid self-pumping effect according to claim 4, characterized in that the part of the sealing ring (2) connected with the outer ring (1) is provided with an outer lip (27), the outer ring (1) is provided with an outer ring sealing groove (11), the outer lip (27) is clamped into the outer ring sealing groove (11), and the outer lip (27) is in clearance fit with the outer ring sealing groove (11).
7. A high speed rolling bearing seal arrangement with fluid self pumping effect according to claim 6, characterized in that the outer lip (27) is provided with a shaped relief groove (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210979334.2A CN115325034B (en) | 2022-08-16 | 2022-08-16 | High-speed rolling bearing sealing structure with fluid self-pumping effect |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210979334.2A CN115325034B (en) | 2022-08-16 | 2022-08-16 | High-speed rolling bearing sealing structure with fluid self-pumping effect |
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| CN115325034A CN115325034A (en) | 2022-11-11 |
| CN115325034B true CN115325034B (en) | 2023-08-08 |
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| CN116123211B (en) * | 2023-02-22 | 2023-08-01 | 南京林业大学 | High-speed rolling bearing with self-adaptive sealing and reinforced cooling structure |
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| 流体动压柔性径向密封技术的研究与应用;陈家庆, 刘录, 赵艳铃;石油化工高等学校学报(第01期);全文 * |
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