CN111853060B - Self-lubricating bearing and manufacturing method - Google Patents
Self-lubricating bearing and manufacturing method Download PDFInfo
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- CN111853060B CN111853060B CN202010769914.XA CN202010769914A CN111853060B CN 111853060 B CN111853060 B CN 111853060B CN 202010769914 A CN202010769914 A CN 202010769914A CN 111853060 B CN111853060 B CN 111853060B
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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
- F16C33/30—Parts of ball or roller bearings
- F16C33/38—Ball cages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- F16C33/30—Parts of ball or 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
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
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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
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention relates to the technical field of bearing equipment, and provides a self-lubricating bearing and a manufacturing method thereof. Through above-mentioned technical scheme, the problem that the lubricated effect of self-lubricating bearing is poor among the prior art has been solved.
Description
Technical Field
The invention relates to the technical field of bearing equipment, in particular to a self-lubricating bearing and a manufacturing method thereof.
Background
At present, the fields of light industrial machinery, heavy industrial machinery, construction machinery, metallurgical machinery, conveying machinery and the like in China, such as continuous casting machines, rolling mills, injection molding machines, paper machines, die guide columns, ships and the like, all have the application of self-lubricating bearing plates. However, the current self-lubricating plates are substantially entirely made of copper alloys, making them expensive. In addition, the solid lubricating columns embedded on the self-lubricating plate mainly comprise polytetrafluoroethylene or graphite. The solid lubricating column taking polytetrafluoroethylene as a matrix mainly comprises the polytetrafluoroethylene, wherein a small amount of graphite powder and pure copper powder are added, and the solid lubricating column is formed by pressing and sintering, so that the material has good elastoplasticity and low friction coefficient, but the temperature resistance of the material is poor; the main component of the solid lubricating column taking graphite as a main body is graphite powder, a certain amount of asphalt and asphalt mastic are added, and the solid lubricating column prepared by the method is formed by pressing and high-temperature roasting, so that the temperature resistance is greatly improved, but the solid lubricating column is poor in elastoplasticity and easy to break, and based on the problems, a bearing plate which is suitable for high-temperature heavy load, dust prevention and self lubrication and a corresponding bearing are urgently needed.
Disclosure of Invention
The invention provides a self-lubricating bearing and a manufacturing method thereof, and solves the problem that the self-lubricating bearing in the prior art is poor in lubricating effect.
The technical scheme of the invention is as follows:
the utility model provides a self-lubricating bearing, includes the bearing plate, sets up holder on the bearing plate, the bearing plate includes outer loop basic unit, connecting ring layer and lubricated ring layer, the connecting ring layer with outer loop basic unit welding, lubricated ring layer is inlayed connecting ring in situ side, the holder rotates and sets up lubricated ring in situ side, the holder includes the support frame and scrapes the grinding subassembly, be provided with a plurality of through-holes on the support frame, scrape the grinding subassembly including scraping grinding brush and angular adjustment mechanism, it is in to scrape the articulated setting of grinding brush on the support frame, the brush hair of scraping the grinding brush passes the through-hole, angular adjustment mechanism articulates on the support frame, scrape the grinding brush with the help of angular adjustment mechanism with lubricated ring layer contacts.
The angle adjusting mechanism comprises an adjusting rod, a stand column and an elastic piece, the adjusting rod is hinged to the support frame, the stand column is arranged at one end of the adjusting rod, the elastic piece is sleeved on the stand column, and one end of the elastic piece acts on one end of the scraping and grinding brush.
The support frame includes sleeve and lock ring, sleeve one end is provided with the ring ear, the ring ear radius is greater than the sleeve, the sleeve inboard is provided with first recess, scrape the brush-polish with angle adjustment mechanism sets up in the first recess, the one end of adjusting lever is spilt the sleeve is inboard, the telescopic other end with the lock ring is connected.
The locking ring is provided with a one-way lock catch, the circumference of the other end of the sleeve is provided with a second groove, and the one-way tooth buckle is arranged in the second groove.
The inner circumference of the sleeve is provided with a boss.
The outer ring base layer is made of a carbon steel plate, and the connecting ring layer is made of tin bronze.
And a third groove is arranged on the connecting ring layer and is a dovetail groove.
The manufacturing method of the bearing plate comprises the following steps:
s1, performing dye check and ultrasonic check treatment on the outer ring base layer and the connecting ring layer, and cleaning and purifying the surface to be combined of the materials by adopting a manual, mechanical, chemical or electrochemical method;
s2, the outer ring base layer is used as a substrate, the connecting ring layer is used as a composite plate, the outer ring base layer and the connecting ring layer are both annular, the ratio of the thickness of the outer ring base layer to the thickness of the connecting ring layer is not less than 3:1, and a welding distance is arranged between the composite plate and the substrate;
s3, arranging explosives on the surface of the connecting ring layer, and arranging a buffer layer between the explosives and the connecting ring layer;
s4, after welding, ultrasonic flaw detection is adopted, a carbon arc gouging mode is adopted for a position with a defect to remove a compound layer of a connecting ring layer on the surface of the defect, then a welding wire is adopted to weld and repair the compound layer at the position with the defect, after repair, the repaired surface is polished, then the ultrasonic flaw detection mode is adopted to detect flaws on the repaired surface until the flaws are qualified;
s5, mixing Al2O3 powder of 200-230 meshes with ammonia water, adjusting the pH to 6-7, and preparing a mixed solution with industrial alcohol according to a ratio of 1: 7. Uniformly spraying the mixed solution on the surface of the connecting ring layer, putting the connecting ring layer into a vacuum furnace after alcohol is completely volatilized, heating to 760-800 ℃, and keeping the temperature for 40-60 min; then cooling by adopting nitrogen, raising the temperature in the furnace to 400 ℃ at a heating speed of 50 ℃ per hour, and then preserving the heat for 8-10 hours; then the furnace is cooled to room temperature.
Further comprising:
s6, roughly processing the surface of the connecting ring layer, processing a dovetail groove on the connecting ring layer, pressing the high-temperature composite solid lubricating material into the dovetail groove on the connecting ring layer, and standing for 8 hours in normal-temperature air;
s7, placing the bearing plate into a vacuum drying oven for vacuum curing treatment, wherein the heating rate is 60 ℃/h, and the bearing plate is kept warm for 2h after being heated to 120 ℃.
The working principle and the beneficial effects of the invention are as follows:
the invention discloses a self-lubricating bearing, a retainer is rotationally arranged on a bearing plate, the bearing plate is composed of an outer ring base layer, a connecting ring layer and a lubricating ring layer, the connecting ring layer and the outer ring base layer are welded by explosion, the lubricating ring layer is embedded in the lubricating ring layer, the retainer is rotationally arranged at the inner side of the bearing plate and is divided into a support frame and a scraping and grinding component, a plurality of through holes are arranged on the circumference of the support frame, the scraping and grinding component is composed of a scraping and grinding brush and an angle adjusting mechanism, the brush hair of the scraping and grinding brush passes through the through holes on the support frame, the brush hair is contacted with the lubricating ring layer, the scraping and grinding brush is hinged with the support frame, the angle adjusting mechanism is also hinged on the support frame to adjust the angle of the scraping and grinding brush, thereby the pressure between the scraping and grinding brush and the lubricating ring layer is adjusted, the efficiency and the continuity of the lubricating film formed by the lubricating ring layer are improved by the scraping and grinding brush, in the actual working process, the scraping and grinding brush continuously scrapes and grinds the lubricating ring layer along with the rotation of the retainer, so that the lubrication degree is ensured, compared with the prior art, efficient lubrication can be continuously kept under the condition of bearing heavy load, the solid lubricating ring layer can bear a high-temperature environment, and the service life of the bearing is prolonged.
The invention also discloses a manufacturing method of the bearing plate, the bearing plate comprises three parts, an outer ring base layer, a connecting ring layer and a lubricating ring layer, the connecting ring layer and the outer ring base layer adopt an annular explosion welding mode, the connecting ring layer is tin bronze with better ductility and associativity, the outer ring base layer is carbon steel, annular explosion welding is adopted, a buffer layer is arranged between the connecting ring layer and the explosion layer to realize the protection of the connecting ring layer, after welding is finished, the surface of a defect is treated and repaired by adopting carbon arc gouging, ultrasonic wave is used for carrying out flaw detection on the surface, Al2O3 powder is mixed with ammonia water to adjust the pH value to PF 6-7 and is mixed with industrial alcohol according to the proportion of 1:7, after being sprayed on the connecting ring layer to volatilize, the heat treatment is carried out in a vacuum furnace, the internal stress of the bearing plate is eliminated, the surface hardness is improved to 276HV by testing, after the surface of the connecting ring layer is roughly processed, the dovetail groove is processed, the high-temperature consistent solid lubricating material is pressed into the groove, standing is carried out at normal temperature, vacuum drying and curing are carried out to form the lubricating ring layer, the lubricating ring layer is cured in the dovetail groove, the fixing effect of the lubricating ring layer is improved, the bearing plate is subjected to annular explosive welding, the base body connecting effect is good, the internal stress is eliminated through surface treatment and heat treatment, the surface hardness is improved, the adaptability of the bearing plate in a heavy-load high-temperature environment is stronger, and the defects that the bearing plate is difficult to manufacture and high in cost in the prior art are overcome.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of the overall axial structure of the present invention;
FIG. 2 is an exploded view of the cage construction of the present invention;
FIG. 3 is a side view of the present invention;
FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;
FIG. 5 is a partial enlarged view of the portion B in FIG. 4;
FIG. 6 is a top view of the stand of the present invention;
FIG. 7 is a cross-sectional view taken along the line C-C of FIG. 6;
in the figure: 1. the bearing comprises a bearing plate, 2, a retainer, 3, an outer ring base layer, 4, a connecting ring layer, 5, a lubricating ring layer, 6, a support frame, 7, a scraping and grinding assembly, 8, a through hole, 9, a scraping and grinding brush, 10, an angle adjusting mechanism, 11, an adjusting rod, 12, a stand column, 13, an elastic piece, 14, a sleeve, 15, a buckling ring, 16, a ring lug, 17, a first groove, 18, a one-way lock catch, 19, a second groove, 20, a one-way tooth buckle, 21, a boss, 22 and a third groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 inventive step, are intended to be within the scope of the present invention.
As shown in fig. 1 to 7, the present embodiment proposes a self-lubricating bearing, which includes a bearing plate 1, a retainer 2 disposed on the bearing plate 1, the bearing plate 1 comprises an outer ring base layer 3, a connecting ring layer 4 and a lubricating ring layer 5, the connecting ring layer 4 is welded with the outer ring base layer 3, the lubricating ring layer 5 is embedded inside the connecting ring layer 4, the retainer 2 is rotatably arranged inside the lubricating ring layer 5, the retainer 2 comprises a support frame 6 and a scraping and grinding component 7, a plurality of through holes 8 are arranged on the support frame 6, the scraping and grinding assembly 7 comprises a scraping and grinding brush 9 and an angle adjusting mechanism 10, the scraping and grinding brush 9 is hinged on the supporting frame 6, the bristles of the scraping and grinding brush 9 penetrate through the through holes 8, the angle adjusting mechanism 10 is hinged to the supporting frame 6, and the scraping and grinding brush 9 is in contact with the lubricating ring layer 5 through the angle adjusting mechanism 10.
In the embodiment, the self-lubricating bearing is disclosed, a retainer 2 is rotatably arranged on a bearing plate 1, the bearing plate 1 is composed of an outer ring base layer 3, a connecting ring layer 4 and a lubricating ring layer 5, the connecting ring layer 4 and the outer ring base layer 3 are formed by explosion welding, the lubricating ring layer 5 is embedded in the lubricating ring layer 5, the retainer 2 is rotatably arranged on the inner side of the bearing plate 1, the retainer 2 is divided into a support frame 6 and a scraping and grinding assembly 7, a plurality of through holes 8 are formed in the circumference of the support frame 6, the scraping and grinding assembly 7 is composed of a scraping and grinding brush 9 and an angle adjusting mechanism 10, the bristles of the scraping and grinding brush 9 penetrate through the through holes 8 in the support frame 6, the bristles are in contact with the lubricating ring layer 5, the scraping and grinding brush 9 is hinged with the support frame 6, the angle adjusting mechanism 10 is further hinged on the support frame 6, the angle of the scraping and grinding brush 9 is adjusted, so that the pressure between the scraping and grinding brush 9 and the lubricating ring layer 5 is adjusted, the efficiency and the continuity of the lubricating film formed by the lubricating ring layer 5 are improved, in the actual working process, the scraping brush 9 continuously scrapes the lubricating ring layer 5 along with the rotation of the retainer 2, and the lubrication degree is ensured.
The angle adjusting mechanism 10 comprises an adjusting rod 11, a stand column 12 and an elastic piece 13, wherein the adjusting rod 11 is hinged to the support frame 6, the stand column 12 is arranged at one end of the adjusting rod 11, the elastic piece 13 is sleeved on the stand column 12, and one end of the elastic piece 13 acts on one end of the scraping and grinding brush 9.
In this embodiment, the angle adjusting mechanism 10 is composed of an adjusting rod 11, a column 12 and an elastic member 13, the adjusting rod 11 is hinged on the supporting frame 6, the column 12 is arranged at one end of the adjusting rod 11, the elastic member 13 is arranged on the column 12, one end of the elastic member 13 acts on one end of the scraping and grinding brush 9, the other end acts on the adjusting rod 11, in the working process, after the shaft is mounted on the bearing, the surface of the shaft abuts against one end of the adjusting rod 11, the adjusting rod 11 rotates around the hinged point under the pressure action of the shaft, at this time, the other end of the adjusting rod 11 presses down towards one end of the scraping and grinding brush 9, the column 12 fixes the position and the direction of the elastic member 13, the elastic member 13 transmits the pressure between the adjusting rod 11 and the scraping and grinding brush 9, the scraping and grinding brush 9 is provided with two layers of notches at one end of the elastic member 13, one of the notches can allow the column 12 to pass through, and the other layer is close to the notch of the elastic member 13, the elastic piece 13 acts on a convex shoulder of the notch, so that pressure is transferred, the scraping and grinding brush 9 and the lubricating ring layer 5 can be always kept in a fit state under the action of the elastic force, damage caused by initial pressing is avoided, and after abrasion is caused due to the fact that only one pressing angle exists, follow-up scraping and grinding effects are not generated.
The support frame 6 includes sleeve 14 and lock ring 15, 14 one end of sleeve is provided with ring ear 16, ring ear 16 radius is greater than sleeve 14, 14 inboards of sleeve are provided with first recess 17, scrape polish-brush 9 with angle adjustment mechanism 10 sets up in the first recess 17, the one end of adjusting lever 11 is leaked sleeve 14 is inboard, the other end of sleeve 14 with lock ring 15 is connected.
In this embodiment, the supporting frame 6 is composed of a sleeve 14 and a fastening ring 15, a ring lug 16 is arranged at one end of the sleeve 14, the alarm of the ring lug 16 is larger than that of the sleeve 14, the ring lug 16 plays a role in fixing the end of the bearing plate 1 and has a dustproof effect, a first groove 17 is arranged on the inner side of the sleeve 14, the scraping and grinding brush 9 and the angle adjusting device are arranged in the first groove 17, one end of the adjusting rod 11, which is in contact with the shaft, leaks out of the inner side of the sleeve 14, the other end of the sleeve 14 is connected with the fastening ring 15, the other end of the bearing plate 1 plays a role in fixing and playing a role in dustproof effect, in the working process, the shaft is arranged on the inner side of the supporting frame 6, when the shaft is inserted, the side wall of the shaft presses the part of the adjusting rod 11, which leaks out of the inner wall of the sleeve 14, the adjusting rod 11 is positioned in the first groove 17, and the operability of inserting the shaft is improved.
The locking ring 15 is provided with a one-way lock 18, the other end of the sleeve 14 is circumferentially provided with a second groove 19, and the second groove 19 is internally provided with the one-way tooth buckle 20.
In this embodiment, the fastening ring 15 is circumferentially provided with the one-way latch 18, one end of the principle ring lug 16 on the sleeve 14 is provided with the second groove 19, and the one-way gear buckle 20 is arranged in the second groove 19, so that during installation, the one-way latch 18 on the fastening ring 15 extends into the second groove 19, the fastening ring 15 is rotated, the one-way locking opening is engaged with the one-way gear buckle 20, and the locking purpose is achieved.
The inner circumference of the sleeve 14 is provided with a boss 21.
In this embodiment, be provided with boss 21 at the inboard circumference of sleeve 14, offer the groove with boss 21 complex in epaxial corresponding position, through boss 21 transmission moment of torsion when the axle rotates, drive sleeve 14 rotatory, form one deck lubricating film through lubricating ring layer 5 between sleeve 14 and bearing plate 1, reduce the resistance when rotating.
The outer ring base layer 3 is a carbon steel plate, and the connecting ring layer 4 is tin bronze.
In this embodiment, outer loop basic unit 3 is the carbon steel board, and connecting ring layer 4 is tin bronze, and the intensity of carbon steel board is high, and the ductility and the associativity of tin bronze are better, and are with low costs.
And a third groove 22 is formed in the connecting ring layer 4, and the third groove 22 is a dovetail groove.
In this embodiment, the third groove 22 is formed in the connecting ring layer 4, the third groove 22 is a dovetail groove, the lubricating ring layer 5 is located in the third groove 22, and the stability of the lubricating ring layer 5 is improved by the dovetail groove structure.
The method comprises the following steps:
s1, performing dye check and ultrasonic check treatment on the outer ring layer 3 and the connecting ring layer 4, and cleaning and purifying the surface to be combined of the materials by adopting a manual, mechanical, chemical or electrochemical method;
s2, taking the outer ring base layer 3 as a substrate, taking the connecting ring layer 4 as a composite plate, wherein the outer ring base layer 3 and the connecting ring layer 4 are both in a ring shape, the ratio of the thickness of the outer ring base layer 3 to the thickness of the connecting ring layer 4 is not less than 3:1, and a welding distance is arranged between the composite plate and the substrate;
s3, arranging explosives on the surface of the connecting ring layer 4, and arranging a buffer layer between the explosives and the connecting ring layer 4;
s4, after welding, ultrasonic flaw detection is adopted, the carbon arc gouging mode is adopted for the positions with defects to remove the compound layers of the connecting ring layers 4 on the surfaces of the defects, then welding wires are adopted to weld and repair the compound layers at the positions with the defects, after repair, the repaired surfaces are polished, then the ultrasonic flaw detection mode is adopted to detect flaws on the repaired surfaces until the flaws are qualified;
s5, mixing Al2O3 powder of 200-230 meshes with ammonia water, adjusting the pH to 6-7, and preparing a mixed solution with industrial alcohol according to a ratio of 1: 7. Uniformly spraying the mixed solution on the surface of the connecting ring layer 4, putting the connecting ring layer 4 into a vacuum furnace after alcohol is completely volatilized, heating to 760-800 ℃, and keeping the temperature for 40-60 min; then cooling by adopting nitrogen, raising the temperature in the furnace to 400 ℃ at a heating speed of 50 ℃ per hour, and then preserving the heat for 8-10 hours; then the furnace is cooled to room temperature.
Further comprising:
s6, roughly processing the surface of the connecting ring layer 4, processing a dovetail groove on the connecting ring layer 4, pressing the high-temperature composite solid lubricating material into the dovetail groove on the connecting ring layer 4, and standing in normal-temperature air for 8 hours;
s7, placing the bearing plate 1 into a vacuum drying oven for vacuum curing treatment, wherein the heating rate is 60 ℃/h, and when the temperature is heated to 120 ℃, the temperature is kept for 2 h.
In the embodiment, the bearing plate 1 is composed of three parts, an outer ring base layer 3, a connecting ring layer 4 and a lubricating ring layer 5, the connecting ring layer 4 and the outer ring base layer 3 adopt an annular explosion welding mode, the connecting ring layer 4 is tin bronze with better ductility and associativity, the outer ring base layer 3 is carbon steel, annular explosion welding is adopted, firstly, coloring, flaw detection and ultrasonic flaw detection are carried out on the outer ring base layer 3 and the connecting ring layer 4, manual grinding, mechanical grinding, chemical soaking and electrochemical methods are adopted to treat the surface to ensure the integrity of materials, the outer ring base layer 3 is used as a base plate, the connecting ring layer 4 is used as a composite plate, the thickness ratio is not less than 3:1, the thickness of the ratio can ensure the stability of the shape of the outer ring base layer 3, the connecting ring layer 4 is tin bronze, the ductility is strong, a buffer layer is arranged between the connecting ring layer 4 and the explosion layer, the protection of the connecting ring layer 4 is realized, after explosion welding, the tin bronze is connected with a carbon steel plate at high impact and high temperature, after welding, the surface of a defect is treated and repaired by adopting a carbon arc gouging machine, ultrasonic waves are used for carrying out flaw detection on the surface, then Al2O3 powder is mixed with ammonia water to adjust the pH value to PF 6-7 and mixed with industrial alcohol according to the proportion of 1:7, the mixture is sprayed on the connecting ring layer 4, heat treatment is carried out in a vacuum furnace after volatilization, the temperature is firstly heated to 760-800 ℃, and the duration is 40-60 min; then cooling by adopting nitrogen, raising the temperature in the furnace to 400 ℃ at a heating speed of 50 ℃ per hour, and then preserving the heat for 8-10 hours; after that, the bearing plate 1 is cooled to room temperature along with the furnace, the internal stress of the bearing plate 1 is eliminated, the surface hardness is improved, the surface hardness can reach 276HV through testing, after rough machining is carried out on the surface of the connecting ring layer 4, a dovetail groove is machined, the high temperature accords with the solid lubricating material and is pressed into the groove, standing is carried out for 8 hours at normal temperature, vacuum drying and curing are carried out to form the lubricating ring layer 5, the heating rate is 60 ℃/h, when the temperature is heated to 120 ℃, heat is preserved for 2 hours, the lubricating ring layer 5 is cured in the dovetail groove, the fixing effect of the lubricating ring layer 5 is improved, the bearing plate 1 in the invention is welded through annular explosion, the base body connecting effect is good, the internal stress is eliminated through surface treatment and heat treatment, the surface hardness is improved, the adaptability of the bearing plate 1 in the heavy-load high-temperature environment is stronger, and the defects that the bearing plate 1 is difficult to manufacture and high in cost in the prior art are overcome.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The self-lubricating bearing comprises a bearing plate (1) and a retainer (2) arranged on the bearing plate (1), and is characterized in that the bearing plate (1) comprises an outer ring base layer (3), a connecting ring layer (4) and a lubricating ring layer (5), the connecting ring layer (4) is welded with the outer ring base layer (3), the lubricating ring layer (5) is embedded in the inner side of the connecting ring layer (4), the retainer (2) is rotatably arranged in the inner side of the lubricating ring layer (5), the retainer (2) comprises a support frame (6) and a scraping and grinding assembly (7), a plurality of through holes (8) are formed in the support frame (6), the scraping and grinding assembly (7) comprises a scraping and grinding brush (9) and an angle adjusting mechanism (10), the scraping and grinding brush (9) is hinged on the support frame (6), and bristles of the scraping and grinding brush (9) penetrate through the through holes (8), the angle adjusting mechanism (10) is hinged on the supporting frame (6), and the scraping and grinding brush (9) is in contact with the lubricating ring layer (5) by means of the angle adjusting mechanism (10);
angle adjustment mechanism (10) include adjusting lever (11), stand (12) and elastic component (13), adjusting lever (11) are articulated to be set up on support frame (6), stand (12) set up the one end of adjusting lever (11), elastic component (13) cover is established on stand (12), elastic component (13) one end is used in the one end of scraping and rubbing brush (9).
2. The self-lubricating bearing of claim 1, characterized in that the support frame (6) comprises a sleeve (14) and a snap ring (15), wherein one end of the sleeve (14) is provided with a ring lug (16), the radius of the ring lug (16) is larger than that of the sleeve (14), a first groove (17) is formed in the inner side of the sleeve (14), the scraping brush (9) and the angle adjusting mechanism (10) are arranged in the first groove (17), one end of the adjusting rod (11) leaks out of the inner side of the sleeve (14), and the other end of the sleeve (14) is connected with the snap ring (15).
3. Self-lubricating bearing according to claim 2, characterized in that the snap ring (15) is provided with a one-way snap (18), the other end of the sleeve (14) is circumferentially provided with a second groove (19), and a one-way tooth (20) is arranged in the second groove (19).
4. A self-lubricating bearing according to claim 3, characterised in that the sleeve (14) is provided with a boss (21) circumferentially on the inside.
5. Self-lubricating bearing according to claim 1, characterized in that the outer ring base layer (3) is a carbon steel plate and the connecting ring layer (4) is tin bronze.
6. Self-lubricating bearing according to claim 1, wherein the connecting ring layer (4) is provided with a third groove (22), the third groove (22) being a dovetail groove.
7. The method for manufacturing a self-lubricating bearing according to claims 1 to 6, comprising the steps of:
s1, performing dye check and ultrasonic check treatment on the outer ring base layer (3) and the connecting ring layer (4), and cleaning and purifying the surface to be combined of the materials by adopting a manual, mechanical, chemical or electrochemical method;
s2, taking the outer ring base layer (3) as a substrate, taking the connecting ring layer (4) as a composite plate, wherein the outer ring base layer (3) and the connecting ring layer (4) are both annular, the ratio of the thickness of the outer ring base layer (3) to the thickness of the connecting ring layer (4) is not less than 3:1, and a welding distance is arranged between the composite plate and the substrate;
s3, arranging explosives on the surface of the connecting ring layer (4), and arranging a buffer layer between the explosives and the connecting ring layer (4);
s4, after welding, ultrasonic flaw detection is adopted, the composite layer of the connecting ring layer (4) on the surface of the defect is removed by adopting a carbon arc gouging mode for the part with the defect, then the composite layer at the position of the defect is repaired by adopting welding wire overlaying, after the repair is finished, the repaired surface is polished, then the repaired surface is subjected to flaw detection by adopting an ultrasonic flaw detection mode until the flaw detection is qualified;
s5, mixing Al2O3 powder of 200-230 meshes with ammonia water, adjusting the pH to 6-7, preparing a mixed solution with industrial alcohol according to a ratio of 1:7, uniformly spraying the mixed solution on the surface of the connecting ring layer (4), putting the connecting ring layer and the industrial alcohol into a vacuum furnace after the alcohol is completely volatilized, heating to 760-800 ℃, and keeping the temperature for 40-60 min; then cooling by adopting nitrogen, raising the temperature in the furnace to 400 ℃ at a heating speed of 50 ℃ per hour, and then preserving the heat for 8-10 hours; then the furnace is cooled to room temperature.
8. The method of manufacturing a self-lubricating bearing of claim 7, further comprising:
s6, roughly processing the surface of the connecting ring layer (4), processing a dovetail groove on the connecting ring layer (4), pressing the high-temperature composite solid lubricating material into the dovetail groove on the connecting ring layer (4), and standing in normal-temperature air for 8 hours;
s7, putting the bearing plate (1) into a vacuum drying oven for vacuum curing treatment, wherein the heating rate is 60 ℃/h, and the bearing plate is kept warm for 2h after being heated to 120 ℃.
Priority Applications (1)
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| CN115076227B (en) * | 2022-06-07 | 2023-08-04 | 山东华工轴承有限公司 | Easy-to-install self-aligning roller bearing based on mechanical equipment |
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| CN1062023A (en) * | 1990-10-04 | 1992-06-17 | 托林顿公司 | Track roller beaing floating sleeve system |
| RU163829U1 (en) * | 2015-12-25 | 2016-08-10 | Акционерное Общество "Завод "Фиолент" | ROTATING CONTACT DEVICE |
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| JP2017032135A (en) * | 2015-08-06 | 2017-02-09 | 株式会社荏原製作所 | Bearing device and rotary machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062023A (en) * | 1990-10-04 | 1992-06-17 | 托林顿公司 | Track roller beaing floating sleeve system |
| RU163829U1 (en) * | 2015-12-25 | 2016-08-10 | Акционерное Общество "Завод "Фиолент" | ROTATING CONTACT DEVICE |
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