CN113339404B - Grease lubrication one-way thrust conical sliding bearing - Google Patents
Grease lubrication one-way thrust conical sliding bearing Download PDFInfo
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- CN113339404B CN113339404B CN202110579172.9A CN202110579172A CN113339404B CN 113339404 B CN113339404 B CN 113339404B CN 202110579172 A CN202110579172 A CN 202110579172A CN 113339404 B CN113339404 B CN 113339404B
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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
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/02—Sliding-contact bearings
- F16C25/04—Sliding-contact bearings self-adjusting
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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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
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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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
- F16C17/24—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety
- F16C17/246—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety related to wear, e.g. sensors for measuring wear
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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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
-
- 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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/102—Construction relative to lubrication with grease as lubricant
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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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1095—Construction relative to lubrication with solids as lubricant, e.g. dry coatings, powder
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
A grease-lubricated one-way thrust conical sliding bearing comprises a bearing inner ring and a bearing outer ring which are matched and sleeved, wherein the inner circumferential surface of the bearing outer ring is a conical surface, the outer circumferential surface of the bearing inner ring is matched with the inner circumferential surface of the bearing outer ring to form a sliding friction conical surface, solid super-lubrication coatings are respectively arranged on the outer circumferential surface of the bearing inner ring and the inner circumferential surface of the bearing outer ring, an inner ring function curve grease groove is also formed in the outer circumferential surface of the bearing inner ring, and an outer ring function curve grease groove is also formed in the inner circumferential surface of the bearing outer ring; the grease storage cavity extending along the circumferential direction is formed in the bearing inner ring or the bearing outer ring, a plurality of grease supply holes extending along the circumferential direction are uniformly formed in the bearing inner ring or the bearing outer ring, and lubricating grease in the grease storage cavity flows to the sliding friction conical surface along the plurality of grease supply holes and the outer ring function curve grease groove or the inner ring function curve grease groove. The invention adopts a mode of combining a solid super-lubricating coating technology and a grease lubricating technology, and has excellent performance.
Description
Technical Field
The invention relates to the field of sliding bearings, in particular to a grease-lubricated one-way thrust conical sliding bearing.
Background
The bearing is an important basic part of mechanical equipment, and all active mechanical equipment can not be separated from the bearing. Its basic function is that the supporting mechanism rotates, reduces the friction coefficient in its motion, guarantees its gyration precision. In order to reduce friction and improve efficiency in human labor production activities, a sliding bearing and a rolling bearing are invented in sequence. The invention relates to a sliding bearing, which is invented and used by people, and the friction coefficient of the rolling bearing is far lower than that of the sliding bearing along with the technological progress. However, in comparison with the two bearings, except for energy saving caused by the fact that the friction coefficient of the rolling bearing is 2 to 3 orders of magnitude lower than that of the sliding bearing, the two bearings are inferior to the sliding bearing in all aspects, especially in aspects of manufacturing cost, service life, bearing capacity and the like. With the development of modern technology, especially the engineering application of ultra-low lubrication and super-lubrication technology, it is possible to replace the rolling bearing by the sliding bearing. On the other hand, due to the structural characteristics of the rolling element and the inner and outer ring raceways which are main parts of the rolling bearing, when in use, the surface of the rolling element is in point contact or line contact, and is influenced by factors such as vibration, uneven stress, scratches and the like, so that indentation and pitting on the contact surface are easily caused to form fatigue peeling and other damages, and the rotation precision is reduced, so that poor lubrication, friction and vibration are further aggravated, the rolling bearing enters a vicious working cycle, and the whole service life of the bearing is shortened.
With the development of modern technologies, the requirements on bearings in mechanical equipment are higher and higher, and meanwhile, the modern technology also makes it possible to design and manufacture bearings which can meet the requirements on ultra high speed, large load, high rotation precision and large adaptive temperature range. At present, it has been found that there are two main types of materials with super-lubricating properties, one being a solid lubricating coating deposited on a material surface and the other being a liquid lubricant between two material surfaces. However, both of these super-lubricating materials are difficult to achieve ideal super-lubrication, and their super-lubricating characteristics are exhibited on the fine contact surface, and it is difficult to use the super-lubricating material alone as a lubricating means for large-sized components such as bearings.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the grease-lubricated one-way thrust conical sliding bearing which has excellent performance by adopting a mode of combining a solid super-lubrication coating technology and an inner ring grease supply or outer ring grease supply lubrication technology.
In order to achieve the purpose, the invention adopts the specific scheme that: a grease-lubricated one-way thrust conical sliding bearing comprises a bearing inner ring and a bearing outer ring which are matched and sleeved, wherein the inner circumferential surface of the bearing outer ring is a conical surface, the outer circumferential surface of the bearing inner ring is matched with the inner circumferential surface of the bearing outer ring to form a sliding friction conical surface, solid super-lubrication coatings are respectively arranged on the outer circumferential surface of the bearing inner ring and the inner circumferential surface of the bearing outer ring, an inner ring function curve grease groove is also formed in the outer circumferential surface of the bearing inner ring, and an outer ring function curve grease groove is also formed in the inner circumferential surface of the bearing outer ring; the grease storage cavity extending along the circumferential direction is formed in the bearing inner ring or the bearing outer ring, a plurality of grease supply holes extending along the circumferential direction are uniformly formed in the bearing inner ring or the bearing outer ring, and lubricating grease in the grease storage cavity flows to the sliding friction conical surface along the plurality of grease supply holes and the outer ring function curve grease groove or the inner ring function curve grease groove.
The outer circle function curve grease groove and the inner circle function curve grease groove are both wavy.
The bearing inner ring is characterized in that the large-diameter end of the bearing inner ring is a large inner ring end face, the small-diameter end of the bearing inner ring is a small inner ring end face, and end face edge distances are reserved between the wave crest of the inner ring function curve grease groove and the large inner ring end face and between the wave trough of the inner ring function curve grease groove and the small inner ring end face.
The bearing outer ring is characterized in that the large-diameter end of the bearing outer ring is a large outer ring end face, the small-diameter end of the bearing outer ring is a small outer ring end face, and end face edge distances are reserved between the wave crest of the outer ring function curve grease groove and the large outer ring end face and between the wave trough of the outer ring function curve grease groove and the small outer ring end face.
The cross section of the outer ring function curve grease groove and the cross section of the inner ring function curve grease groove are both semicircular and have the same diameter.
The grease inlet of the grease supply hole is provided with a grease inlet chamfer of the grease supply hole, and the grease outlet of the grease supply hole is provided with a grease outlet chamfer of the grease supply hole.
The bus inclination angle of the sliding friction conical surface
Satisfy the requirement of
。
On the basis of the technical scheme, as an option, the grease storage cavity is arranged inside the bearing inner ring.
Furthermore, the inner peripheral surface of the grease storage cavity is opened and closed through a cover plate.
Furthermore, the axial length of the cover plate is greater than that of the grease storage cavity, a fixing groove extending along the circumferential direction is further formed in the inner circumferential surface of the bearing inner ring, and the edge of the cover plate is fixedly connected with the fixing groove.
The inner circumferential surface of the cover plate is flush with the inner circumferential surface of the bearing inner ring.
And both ends of the outer edge of the grease storage cavity are provided with grease storage cavity outer chamfers.
Alternatively, the grease storage cavity is arranged inside the bearing outer ring.
Furthermore, the number of the grease supply holes is equal to the number of the wave crests of the outer ring function curve grease groove, and when the lubricating grease flows onto the sliding friction conical surface from the grease supply holes, the lubricating grease flows out from between two adjacent wave crests of the outer ring function curve grease groove.
The grease supply hole guides the flow of the grease to the generatrix midpoint of the sliding friction cone.
Has the beneficial effects that:
1. the invention combines the solid super-lubrication coating technology and the grease lubrication technology, not only makes up the defect that the prior solid super-lubrication coating can not realize ideal super-lubrication, but also greatly reduces the consumption of lubricating grease, thereby realizing the self grease storage and supply of the bearing without an additional grease supply structure, simplifying the installation process and the matching device of the bearing and reducing the use cost of the bearing;
2. by arranging the inner ring function curve grease groove, lubricating grease can be uniformly distributed on the sliding friction conical surface, so that the lubricating effect is improved, and by arranging the outer ring function curve grease groove, abrasive dust generated on the sliding friction conical surface can be collected, so that the sliding friction conical surface is prevented from being damaged and heated by the abrasive dust;
3. the invention has high rotation precision, needs to apply axial pretightening force during installation, ensures that the conical surfaces of the inner ring and the outer ring are always in a contact state, has an automatic compensation function when the contact surface is worn in a normal range, and avoids the failure of the rotation precision caused by the change of a clearance during the installation and use of the bearing; the consistency of the rotation precision of the bearing in the whole life cycle is ensured structurally;
4. structurally, compared with a rolling bearing, the single-sleeve bearing has the advantages that the number of parts is reduced by more than 85%, and the manufacturing and using cost is reduced; meanwhile, as the main parts are only the inner ring and the outer ring of the sliding bearing, the precision control in the manufacturing process is improved, the interchangeability is improved, the assembly difficulty of the bearing is reduced, and the type and the model of the bearing are greatly simplified; the rotary vibration caused by defects or damages and the like of the roller and the roller path in the manufacturing and the use is effectively avoided;
5. in the aspect of load capacity, the axial and radial bearing capacity of the bearing and the structural rigidity of the bearing unit can be greatly improved, the improvement of the critical rotating speed of a rotary shaft system is facilitated, meanwhile, the impact load resistance is obviously improved compared with that of a rolling bearing, and the appearance size of the bearing is smaller under the condition of the same load compared with that of the rolling bearing, so that the design layout of the rotary shaft system and complete mechanical equipment is facilitated;
6. the sealing performance is improved, the sliding bearing is in surface contact with the inner ring and the outer ring, foreign matters can be effectively prevented from invading the friction surface without adding a sealing element, and the service life of the bearing is prevented from being influenced by the invasion of foreign matters;
7. the service life of the bearing is obviously prolonged, and because the sliding bearing only has an inner ring and an outer ring, the influence on the service life of the whole bearing caused by the failure or damage of the rolling body, the retainer, the sealing ring and the like is avoided, and in the use process of the rolling bearing, the failure of the bearing caused by the damage of the rolling body, the retainer and the sealing ring accounts for more than 80 percent of the failure of the function of the bearing;
8. the use and maintenance cost is reduced, and the use and maintenance cost is reduced and the operation reliability of the whole machine is improved due to the increase of the whole service life of the bearing; particularly for the failure of large and high-cost bearings, the original technical performance of the bearing can be recovered only by repairing the matching surface; the ultra-large bearing is beneficial to being manufactured by subsection processing and assembled on the using site, so that the manufacturing difficulty can be reduced, and the installation difficulty on the transportation and using site can also be reduced.
Drawings
FIG. 1 is a front view of the whole structure of the bearing adopting the inner ring grease storage scheme;
FIG. 2 isbase:Sub>A sectional view A-A of FIG. 1;
FIG. 3 is an enlarged view of portion C of FIG. 2;
FIG. 4 is an enlarged view of section D of FIG. 2;
FIG. 5 is a cross-sectional view B-B of FIG. 2;
FIG. 6 is a front view of the outer race of the bearing of the present invention utilizing an inner race grease retention scheme;
FIG. 7 is a cross-sectional view E-E of FIG. 6;
FIG. 8 is a front view of the bearing inner race of the present invention employing the inner race grease retention scheme;
FIG. 9 is a side view of the bearing inner race of the present invention utilizing an inner race grease retention scheme;
FIG. 10 is a schematic view of a face-to-face assembly of the present invention using an inner ring grease reservoir scheme;
FIG. 11 is a schematic view of a back-to-back assembly of the present invention using an inner ring grease storage scheme;
FIG. 12 is a schematic illustration of a tandem assembly of the present invention employing an inner race grease storage scheme;
FIG. 13 is the inclination of the generatrix of the sliding friction cone of the present invention using the inner ring grease reservoir
The overall structure of the device is shown schematically;
FIG. 14 shows the inclination of the generatrix of the sliding friction cone using the inner ring grease reservoir of the present invention
A schematic structural diagram of the time;
FIG. 15 is a front view of the overall structure of the bearing of the present invention using the outer ring grease storage scheme;
FIG. 16 is a sectional view F-F of FIG. 15;
fig. 17 is an enlarged view of portion G of fig. 16;
fig. 18 is an enlarged view of portion H of fig. 16;
FIG. 19 is a cross-sectional view K-K of FIG. 16;
FIG. 20 is a front view of the bearing outer race of the present invention employing the outer race grease storage scheme;
FIG. 21 is a cross-sectional view M-M of FIG. 20;
FIG. 22 is a side view of the inner race of the bearing of the present invention utilizing the outer race grease retention scheme;
FIG. 23 is a front view of the inner race of the bearing of the present invention employing the outer race grease retention scheme;
reference numerals: 1. bearing inner ring, 2, bearing outer ring, 3, bearing inner hole chamfer, 4, inner ring cover plate weld joint, 5, inner ring large end face, 6, grease storage cavity, 7, grease supply hole grease inlet chamfer, 8, friction cone chamfer, 9, outer ring small end face, 10, bearing outer wall chamfer, 11, sliding friction cone, 12, bearing outer wall, 13, grease supply hole, 14, grease supply hole grease outlet chamfer, 15, outer ring large end face, 16, grease storage cavity outer chamfer, 17, inner ring small end face, 18, cover plate, 19, outer ring function curve grease groove, 20, inner ring function curve grease groove, 21, inner and outer ring function curve grease groove cross section when oil groove is conducted, 22, spacer ring, 23, inner ring cone chamfer, 24, grease storage cavity chamfer, 25, outer ring cover plate weld joint, 26, cover plate outer wall, 27, outer ring inner chamfer, 28, bearing inner hole;
the dip angle of the generatrix of the sliding friction conical surface, and the rotation center line.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: the embodiment adopts an inner ring grease supply scheme, and the related figures are figures 1 to 9.
The grease lubricated one-way thrust conical sliding bearing adopts an inner ring grease supply scheme and comprises a bearing inner ring 1 and a bearing outer ring 2 which are matched and sleeved, wherein the inner circumferential surface of the bearing outer ring 2 is a conical surface, and the outer circumferential surface of the bearing inner ring 1 is matched with the inner circumferential surface of the bearing outer ring 2. The outer circumferential surface of the bearing inner ring 1 and the inner circumferential surface of the bearing outer ring 2 are both provided with solid super-lubricating coatings, and the solid super-lubricating coatings can adopt graphene coatings and the like. An inner ring function curve grease groove 20 is further formed in the outer peripheral surface of the bearing inner ring 1, and an outer ring function curve grease groove 19 is further formed in the inner peripheral surface of the bearing outer ring 2. Bearing inner race 1 is inside to be seted up along the fat chamber 6 that stores up that the circumferencial direction extends, and it has lubricating grease to hold in the fat chamber 6 to store up, and bearing inner race 1 is gone up and evenly is seted up the confession fat hole 13 of a plurality of radial extension along the circumferencial direction, and the one end intercommunication that supplies fat hole 13 stores up fat chamber 6, and the other one end that supplies fat hole 13 link up inner circle function curve fat groove 20.
When the bearing operates, the outer circumferential surface of the bearing inner ring 1 and the inner circumferential surface of the bearing outer ring 2 are in mutual contact friction to form a sliding friction conical surface 11, and the solid super-lubricating coating can greatly reduce the friction force on the sliding friction conical surface 11, so that the performance and the service life of the bearing are greatly improved. However, in the prior art, a coating material which can really realize complete super-lubrication on a large contact area is still lacked, so that the grease storage cavity 6 is arranged, lubricating grease is pre-installed in the grease storage cavity 6, and in the bearing operation process, the lubricating grease flows to the inner ring function curve grease groove 20 along the grease supply hole 13, and is uniformly distributed on the friction conical surface 11 along with the rotation of the bearing inner ring 1 after reaching the inner ring function curve grease groove 20, so that the lubricating effect of the solid super-lubrication coating is supplemented, and the lubricating effect is further improved. Compared with the traditional grease lubrication bearing, the grease lubrication bearing disclosed by the invention is combined with a solid super lubrication coating technology, and the demand of the lubricating grease is greatly reduced, so that the lubricating grease can be stored in the bearing inner ring 1 in advance to realize inner ring grease supply without an additional grease supply structure, the installation process and the matching device of the bearing are simplified, and the use cost of the bearing is reduced.
Inclination of generatrix of sliding friction cone 11
The conditions are satisfied:
，
is related to the axial force and the radial force born by the bearing design, and is characterized in that the smaller the axial force born by the design is, the smaller the axial force born by the design is
The smaller the value of (A), the greater the axial force the design is subjected to, the greater the
The larger the value of (a). As shown in FIG. 13, when
In the process, the borne axial force is small, and the borne radial force is large; as shown in FIG. 14, when
In time, the axial force experienced is large, while the radial force experienced is small.
Although the bearing inner ring 1 and the bearing outer ring 2 are in direct contact, the influence on the bearing operation caused by the intrusion of foreign matters into the sliding friction conical surface 11 can be effectively avoided, the bearing inevitably generates abrasive dust during operation, and the friction force is increased and the bearing loss is accelerated due to the fact that a large amount of abrasive dust is accumulated on the sliding friction conical surface 11. Thus, an outer functional curve grease groove 19 is formed. When the inner ring function curve grease groove 20 is overlapped with the outer ring function curve grease groove 19, the lubricating grease in the inner ring function curve grease groove 20 enters the outer ring function curve grease groove 19, in the process, as the specific gravity of the abrasive dust is greater than that of the lubricating grease, the abrasive dust is deposited at the bottom of the outer ring function curve grease groove 19 under the action of centrifugal force to play a role in purifying the lubricating grease, and the lubricating grease flows along the inner ring function curve grease groove 20 to lubricate the sliding friction conical surface 11, so that the lubricating effect is remarkably improved, the service time of the lubricating grease can be effectively prolonged, and the normal work of the bearing is guaranteed.
Structurally, the single-set bearing only comprises the bearing inner ring 1 and the bearing outer ring 2, the number of parts is small, the manufacturing and using cost is reduced, the accuracy of precision control in the manufacturing process and the interchangeability of the parts are improved, the assembly difficulty of the bearing is reduced, the type and the model of the bearing are greatly simplified, and the rotary vibration caused by defects or damages of rolling elements and a raceway during manufacturing and using can be effectively avoided due to the fact that the sliding bearing does not comprise the rolling elements. In terms of load capacity, the sliding friction conical surface 11 between the bearing inner ring 1 and the bearing outer ring 2 is conical, so that the simple structure of the invention can greatly improve the axial and radial bearing capacity of the bearing and the structural rigidity of the bearing unit on the premise of completely meeting the function of the rolling bearing, is beneficial to improving the critical rotating speed of a rotary shaft system, and simultaneously has obviously improved impact load resistance compared with the rolling bearing. Compared with a rolling bearing, under the condition of the same load, the invention has smaller overall dimension and is beneficial to the overall design layout of a rotary shaft system; because the bearing is always in conical surface contact, the vibration and noise generated by the bearing can be reduced to almost zero, so that the fatigue caused by the vibration of the bearing under the action of various loads in work can be ignored; under the action of the pre-tightening device, the bearing has the function of automatic compensation of friction conical surface abrasion, and the consistency of the rotation precision of the whole life cycle of the bearing is ensured.
The bearing inner ring 1 can be directly molded by adopting a lost foam technology during manufacturing, and the casting has good quality and high dimensional precision, but the process is more complex. Therefore, the grease storage chamber 6 penetrates the inner circumferential surface of the bearing inner ring 1, and a cover plate 18 for closing the grease storage chamber 6 is also fixedly connected to the bearing inner ring 1, and the cover plate 18 is annular. During manufacturing, the grease storage cavity 6 can be machined by adopting the traditional process, and then the grease storage cavity 6 is sealed by the cover plate 18, so that the manufacturing process is simplified, and the manufacturing time is shortened. In order to ensure the sealing effect of the cover plate 18, the axial length of the cover plate 18 is greater than that of the grease storage cavity 6, correspondingly, a fixing groove extending along the circumferential direction is further formed in the inner circumferential surface of the bearing inner ring 1, the width of the fixing groove is equal to that of the cover plate 18 and slightly greater than that of the grease storage cavity 6, the fixing groove is matched with the cover plate 18 and communicated with the grease storage cavity 6, the cover plate 18 is arranged in the fixing groove and can completely seal the grease storage cavity 6, and therefore lubricating grease leakage of the bearing in the storage and transportation processes is avoided. Since the inner race 1 is a rotating member during operation of the bearing, the inner circumferential surface of the inner race 1 must be in direct contact with the rotating shaft, and therefore, the inner wall of the cover plate 18 is flush with the inner circumferential surface of the inner race 1 or a gap is left between the cover plate 18 and the rotating shaft, and it is more appropriate that the inner wall of the cover plate 18 is flush with the inner circumferential surface of the inner race 1 in order to ensure the structural rigidity of the inner race 1. The cover plate 18 and the bearing inner ring 1 can be fixedly connected by welding to form two annular inner ring cover plate welding seams 4, and after welding, the inner ring cover plate welding seams 4 need to be polished to enable the surfaces of the inner ring cover plate welding seams to be flush with the inner circumferential surface of the bearing inner ring 1.
The one end that supplies fat hole 13 and be linked together with storing up fat chamber 6 is provided with and supplies fat hole grease inlet chamfer 7, and the other one end that supplies fat hole 13 is provided with and supplies fat hole grease outlet chamfer 14, supplies fat hole grease inlet chamfer 7 and supplies fat hole grease outlet chamfer 14 to make lubricating grease more smooth when flowing into and flow out and supply fat hole 13. Store up the both ends on the border of fat chamber 6 and all be provided with and store up outer chamfer 16 of fat chamber, store up outer chamfer 16 of fat chamber for the fillet, under centrifugal inertial effect during the bearing operation, store up outer chamfer 16 of fat chamber and can make lubricating grease assemble to the direction that supplies fat hole 13, guarantee to supply the lubricating grease in the fat hole 13 can not interrupt, when guaranteeing that lubricated effect can not descend, also can utilize the lubricating grease that stores up in the fat chamber 6 fully.
One surface of the bearing inner ring 1 corresponding to the large end of the sliding friction conical surface 11 is an inner ring large end surface 5, and one surface of the bearing inner ring 1 corresponding to the small end of the sliding friction conical surface 11 is an inner ring small end surface 17. In order to accelerate the flow of the lubricating grease in the inner ring function curve grease groove 20 and ensure that the lubricating grease can be uniformly distributed on the sliding friction conical surface 11, the inner ring function curve grease groove 20 is wave-shaped, a function curve grease groove edge distance with the width L is reserved between the wave crest of the inner ring function curve grease groove 20 and the inner ring small end surface 17, and a function curve grease groove edge distance with the width L is also reserved between the wave trough of the inner ring function curve grease groove 20 and the inner ring large end surface 5. One surface of the bearing outer ring 2 corresponding to the large end of the sliding friction conical surface 11 is an outer ring large end surface 15, and one surface of the bearing outer ring 2 corresponding to the small end of the sliding friction conical surface 11 is an outer ring small end surface 9. In order to ensure that the outer ring function curve grease groove 19 can completely collect the abrasive dust on the sliding friction conical surface 11 and the condition that the abrasive dust is accumulated locally is not generated, the outer ring function curve grease groove 19 is also set to be wavy, and function curve grease groove edge distances with the width L are reserved between the wave crest of the outer ring function curve grease groove 19 and the outer ring small end surface 9 and between the wave trough of the outer ring function curve grease groove 19 and the outer ring large end surface 15. The sections of the inner ring function curve grease groove 20 and the outer ring function curve grease groove 19 are both semicircular, along with the rotation of the bearing inner ring 1, the inner ring function curve grease groove 20 and the outer ring function curve grease groove 19 can be coincided and conducted, and the section 21 of the conducting position when the inner ring function curve oil groove and the outer ring function curve oil groove are coincided is circular.
The axial length of the bearing inner ring 1 is equal to that of the bearing outer ring 2, namely the inner ring big end surface 5 is flush with the outer ring small end surface 9, and the inner ring small end surface 17 is flush with the outer ring big end surface 15.
Bearing inner bore chamfers 3 are arranged at two ends of the inner circumferential surface of the bearing inner ring 1, bearing outer wall chamfers 10 are arranged at two ends of the outer circumferential surface of the bearing outer ring 2, and friction conical surface chamfers 8 are arranged at two ends of the outer circumferential surface of the bearing inner ring 1 and two ends of the inner circumferential surface of the bearing outer ring 2. The setting of bearing hole chamfer 3, friction conical surface chamfer 8 and bearing outer wall chamfer 10 is favorable to the assembly of bearing, and the concrete size of each chamfer can be adjusted according to the holistic size of bearing.
When the device is used alone, a pre-tightening device can be additionally arranged on the inner ring big end face 5 or the outer ring big end face 15, and the pre-tightening device can be pre-tightened under constant pressure or positioned. Because the friction force between the bearing inner ring 1 and the bearing outer ring 2 is extremely small, the axial pretightening force can be properly increased, when the sliding friction conical surface 11 is abraded, the abrasion can be automatically compensated under the action of the pretightening force, and the rotation precision of the bearing is ensured.
When the assembly is used, the face-to-face assembly, the back-to-back assembly or the serial assembly can be adopted. As shown in fig. 10, the face-to-face assembly requires the addition of a spacer 22 between the bearing cones 1 of the two bearings. As shown in fig. 11, when the back-to-back assembly is adopted, a spacer 22 needs to be additionally arranged between the bearing outer rings 2 of the two bearings. As shown in fig. 12, the series assembly is used without the addition of a spacer.
Example 2: in this embodiment, a one-way thrust conical sliding bearing adopting an outer ring grease supply scheme is used, and referring to fig. 15 to 23, compared with embodiment 1, the storage position of the grease in this embodiment is different, which results in a change of the bearing structure.
The utility model provides a one-way thrust conical sliding bearing of outer lane confession fat, includes bearing inner race 1 and bearing outer lane 2 of cooperation suit, and the outer wall of bearing inner race 1 is the circular conical surface, and the big terminal surface 5 of inner race of bearing inner race 1 is inner race load end, and the inner race little terminal surface 17 of bearing inner race 1 is inner race floating end, and the inner race load end is used for bearing axial load when the bearing operates, and bearing inner hole 28 has been seted up to the center department of bearing inner race 1. The inner wall of the bearing outer ring 2 is a conical surface, the large end of the bearing outer ring 2 is an outer ring large end surface 15, and the small end of the bearing outer ring 2 is an outer ring small end surface 9. The outer wall of the bearing inner ring 1 is in sliding contact with the inner wall of the bearing outer ring 2 to form a sliding friction conical surface 11. The outer wall of the bearing inner ring 1 and the inner wall of the bearing outer ring 2 are both provided with the solid super-lubricating coatings, and by utilizing the characteristics of the solid super-lubricating coatings, the friction force on the sliding friction conical surface 11 can be greatly reduced, so that the heating is reduced, the load capacity is improved, and the service life is prolonged.
The present embodiment also uses grease lubrication to make up for the limited performance of the conventional solid super-lubrication coating, as in embodiment 1, but unlike embodiment 1, the grease in this embodiment is stored inside the bearing outer ring 2, and flows onto the sliding friction cone surface 11 through a plurality of grease supply holes 13 formed in the bearing outer ring 2 to lubricate the sliding friction cone surface 11.
The storage mode of the lubricating grease is as follows: offer the storage fat chamber 6 that extends along the circumferencial direction on bearing inner race 2's outer wall, lubricating grease stores in storing up fat chamber 6, and the end of opening of storing up fat chamber 6 seals through apron 18, and apron 18 and bearing inner race 2 welded fastening supply fat hole 13 and store up fat chamber 6 and be linked together. The grease storage cavity 6 is positioned in the middle of the bearing outer ring 2 in the axial direction, so that the mass distribution of the bearing outer ring 2 is more uniform, and the stability during operation is better. Store up the both sides limit of fat chamber 6 bottom and all be provided with and store up fat intracavity chamfer 24, can reduce the processing degree of difficulty of storing up fat chamber 6 on the one hand, on the other hand can guarantee to store up the lubricating grease in the fat chamber 6 and can both leave through supplying fat hole 13, can not leave and remain. The cover plate 18 can be expanded by adopting a heating method during installation, then is sleeved on the periphery of the grease storage cavity 6, is automatically embedded into the grease storage cavity 6 after being cooled, and finally is welded and fixed. Two outer ring cover plate welding seams 25 can be generated after the cover plate 18 and the bearing outer ring 2 are welded and fixed, the outer ring cover plate welding seams 25 need to be processed, and the cover plate outer wall 26 of the cover plate 18, the surface of the outer ring cover plate welding seams 25 and the outer wall of the bearing outer ring 2 are flush, so that the bearing outer ring 2 can be conveniently installed. In order to improve the sealing effect, the width of the cover plate 18 may be slightly larger than the width of the grease storage cavity 6, and then a mounting groove for accommodating the cover plate 18 is formed in the bearing outer ring 2, the width of the mounting groove is equal to the width of the cover plate 18, and the mounting groove is communicated with the grease storage cavity 6.
In order to enable the lubricating grease to be rapidly and uniformly distributed on the sliding friction conical surface 6, an inner ring function curve grease groove 20 for accelerating the flowing of the lubricating grease on the sliding friction conical surface 6 is further formed in the outer wall of the bearing inner ring 1, the inner ring function curve grease groove 20 extends along the circumferential direction of the bearing inner ring 1 and is bent along the axial direction, the lubricating grease enters the inner ring function curve grease groove 20 after flowing on the sliding friction conical surface 6 and flows along the inner ring function curve grease groove 20, so that the lubricating grease is rapidly expanded along the axial direction, and a lubricating film is formed on the sliding friction conical surface 6 along with the rotation of the bearing inner ring 1, so that the lubricating effect is improved.
In the same way as in embodiment 1, in order to collect the wear debris during the operation of the bearing, the inner circumferential surface of the bearing outer ring 2 of the present embodiment is also provided with an outer ring function curve grease groove 19. In this embodiment, the shape and arrangement of the inner circle function curve grease groove 20 and the outer circle function curve grease groove 19 are the same as those of embodiment 1.
Supply the radial extension of fat hole 13 along bearing inner race 2, a plurality of supplies fat hole 13 along bearing inner race 2's circumferencial direction evenly distributed, and the flow of follow all directions can evenly distributed to the lubricating grease on the sliding friction conical surface 6, avoids local lubricating grease to excessively cause the leakage or local lubricating grease is not enough to cause lubricated effect variation. A grease supply hole inlet chamfer 7 is provided at one end of the grease supply hole 13 communicating with the grease storage cavity 6 to enable the grease to smoothly flow into the grease supply hole 13, and a grease supply hole outlet chamfer 14 is provided at one end of the grease supply hole 13 communicating with the sliding friction conical surface 6 to enable the grease to smoothly flow onto the sliding friction conical surface 6 and to diffuse around at the moment of reaching the sliding friction conical surface 6, thereby accelerating the flow of the grease on the sliding friction conical surface 6.
The grease is spread in the inner circle function curve grease groove 20 in the axial direction, and in order to ensure uniform grease spreading, the grease flows to the midpoint of the generatrix of the sliding friction cone 6 through the grease supply hole 13. Moreover, the number of the grease supply holes 13 is equal to the number of the wave crests of the outer-ring function curve grease groove 19, when grease flows onto the sliding friction conical surface 6 from the grease supply holes 13, the grease flows out from between two adjacent wave crests of the outer-ring function curve grease groove 19, namely the grease supply holes 13 are not communicated with the inner-ring function curve grease groove 20, so that when the grease enters the sliding friction surface 6, the sliding friction surface 6 is directly lubricated, the grease continuously enters the inner-ring function curve grease groove 20 from the sliding friction surface 6 along with the rotation of the inner ring 1 of the bearing, when the amount of the grease in the inner-ring function curve grease groove 20 reaches a certain amount, the grease in the inner-ring function curve grease groove 20 can directly contact with the sliding friction conical surface 6, and the inner-ring function curve grease groove 20 can start to uniformly distribute the grease. With this configuration, it is possible to prevent the bearing from being damaged due to a large amount of grease flowing into the inner ring function curve grease groove 20 and failing to lubricate the sliding friction surface 6 when the bearing starts operating.
In different application scenes, the axial load born by the bearing is different, and the bus inclination angle of the sliding friction conical surface 6 can be changed
The bus inclination angle of the sliding friction conical surface 6 is adjusted according to the axial load amount born by the design of the bearing
Satisfy the requirement of
The greater the axial load that is designed to bear,
the larger. In the present embodiment, it is preferred that,
preferably 15.
For convenience of installation, bearing inner hole chamfers 3 are arranged at two ends of a bearing inner hole 28, inner ring conical chamfers 23 are arranged at joints between two end faces of a bearing inner ring 1 and the outer wall of the bearing inner ring 1, outer ring inner chamfers 27 are arranged at joints between two end faces of a bearing outer ring 2 and the inner wall of the bearing outer ring 2, bearing outer wall chamfers 10 are arranged at two ends of a bearing outer wall 16, and the size of each chamfer can be flexibly set according to different actual sizes of bearings.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (15)
1. The utility model provides a grease lubrication one-way thrust conical sliding bearing, includes bearing inner race (1) and bearing inner race (2) of cooperation suit, and the inner peripheral surface of bearing inner race (2) is the circular conical surface, and the outer peripheral face of bearing inner race (1) cooperatees with the inner peripheral surface of bearing inner race (2), forms sliding friction conical surface (11), its characterized in that: solid super-lubricating coatings are arranged on the outer peripheral surface of the bearing inner ring (1) and the inner peripheral surface of the bearing outer ring (2), an inner ring function curve grease groove (20) is formed in the outer peripheral surface of the bearing inner ring (1), and an outer ring function curve grease groove (19) is formed in the inner peripheral surface of the bearing outer ring (2);
a grease storage cavity (6) extending along the circumferential direction is formed in the bearing inner ring (1) or the bearing outer ring, a plurality of grease supply holes (13) extending along the radial direction are uniformly formed in the bearing inner ring (1) or the bearing outer ring along the circumferential direction, and lubricating grease in the grease storage cavity (6) flows to the sliding friction conical surface (11) along the plurality of grease supply holes and an outer ring function curve grease groove (19) or an inner ring function curve grease groove (20); with the rotation of the bearing inner ring (1), the inner ring function curve grease groove (20) and the outer ring function curve grease groove (19) are overlapped and conducted, and lubricating grease in the inner ring function curve grease groove (20) enters the outer ring function curve grease groove (19).
2. A grease-lubricated one-way thrust conical sliding bearing as claimed in claim 1, wherein: the outer ring function curve grease groove (19) and the inner ring function curve grease groove (20) are both wavy.
3. A grease-lubricated one-way thrust conical sliding bearing as claimed in claim 2, wherein: the bearing inner ring is characterized in that the large-diameter end of the bearing inner ring (1) is an inner ring large end face (5), the small-diameter end of the bearing inner ring is an inner ring small end face (17), and end face edge distances are reserved between the wave crest of the inner ring function curve grease groove (20) and the inner ring large end face (5) and between the wave trough of the inner ring function curve grease groove (20) and the inner ring small end face (17).
4. A grease-lubricated one-way thrust conical sliding bearing as claimed in claim 2, wherein: the big diameter end of bearing inner race (2) is outer lane big terminal surface (15), and the little diameter end is outer lane little terminal surface (9), all leave the terminal surface margin between the crest of outer lane function curve fat groove (19) and outer lane big terminal surface (15) and between the trough of outer lane function curve fat groove (19) and outer lane little terminal surface (9).
5. A grease-lubricated one-way thrust conical sliding bearing as claimed in claim 1, wherein: the cross section of the outer ring function curve grease groove (19) and the cross section of the inner ring function curve grease groove (20) are semicircular and have the same diameter.
6. A grease-lubricated one-way thrust conical sliding bearing as claimed in claim 1, wherein: the grease inlet of the grease supply hole (13) is provided with a grease inlet chamfer (7) of the grease supply hole, and the grease outlet of the grease supply hole is provided with a grease outlet chamfer (14) of the grease supply hole.
7. A grease-lubricated one-way thrust conical sliding bearing as claimed in claim 1, wherein: the inclination angle of the generatrix of the sliding friction cone (11)
Satisfy the requirement of
。
8. A grease-lubricated one-way thrust conical sliding bearing as claimed in any one of claims 1 to 7, wherein: the grease storage cavity (6) is arranged inside the bearing inner ring (1).
9. A grease-lubricated one-way thrust conical sliding bearing as claimed in claim 8, wherein: the inner peripheral surface of the grease storage cavity (6) is open and closed by a cover plate (18).
10. A grease-lubricated one-way thrust conical sliding bearing as claimed in claim 9, wherein: the axial length of the cover plate (18) is greater than that of the grease storage cavity (6), a fixing groove extending along the circumferential direction is further formed in the inner circumferential surface of the bearing inner ring (1), and the edge of the cover plate (18) is fixedly connected with the fixing groove.
11. A grease-lubricated one-way thrust conical sliding bearing as claimed in claim 9, wherein: the inner circumferential surface of the cover plate (18) is flush with the inner circumferential surface of the bearing inner ring (1).
12. A grease-lubricated one-way thrust conical sliding bearing as claimed in claim 8, wherein: and both ends of the outer edge of the grease storage cavity (6) are provided with grease storage cavity outer chamfers (16).
13. A grease-lubricated one-way thrust conical sliding bearing as claimed in any one of claims 1 to 7, wherein: and the grease storage cavity (6) is arranged inside the bearing outer ring (2).
14. A grease-lubricated one-way thrust conical sliding bearing as claimed in claim 13, wherein: the number of the grease supply holes (13) is equal to the number of the wave crests of the outer ring function curve grease groove (19), and the lubricating grease flows out from between two adjacent wave crests of the outer ring function curve grease groove (19) when flowing onto the sliding friction conical surface (11) from the grease supply holes (13).
15. A grease-lubricated one-way thrust conical sliding bearing as claimed in claim 13, wherein: the grease supply hole (13) guides the flow of the grease to the generatrix midpoint of the sliding friction cone (11).
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| CN202110579172.9A CN113339404B (en) | 2021-05-26 | 2021-05-26 | Grease lubrication one-way thrust conical sliding bearing |
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| CN202110579172.9A CN113339404B (en) | 2021-05-26 | 2021-05-26 | Grease lubrication one-way thrust conical sliding bearing |
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| CN113339404B true CN113339404B (en) | 2023-03-14 |
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| CN113339404A (en) | 2021-09-03 |
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