Turntable bearings according to different structural types can be broadly divided into the following types of structure:
1, four-point contact ball turntable bearings 2, double-row four-point contact ball turntable bearings 3, cross-cylindrical roller turntable bearings 4, cross-tapered roller turntable bearings 5, three rows of cylindrical roller combination turntable bearings
Parameters
Tolerance, clearance Turntable bearings The tolerance and clearance of rotary disc bearings are in accordance with JB/T 10471 "Rolling Bearings Rotary Disc Bearings", and the tolerance and clearance of rotary disc bearings for wind turbines are in accordance with JB/T 10705 "Rolling Bearings Wind Turbine Bearings". If customers have other special requirements on size, tolerance and clearance, we can provide corresponding products according to the working conditions and user requirements. Cage The cages used in rotor bearings have different structural types such as whole cage, segmented cage or isolated cage, etc. Among them, the whole cage or segmented cage can be used to keep the bearings. The whole cage or segmented cage is made of 20 steel or ZL102 cast aluminum alloy. Isolated cage using polyamide 1010 resin, ZL102 cast aluminum alloy or QA110-3-1.5 aluminum bronze manufacturing. In recent years with the continuous development of the materials industry nylon GRPA66.25 has also been in the design of the segmented cage to promote the application. Bearing lubrication Most of the turntable bearings in the heavy load low-speed working conditions, under normal circumstances, the use of grease-filled lubrication type of bearing lubrication can be extremely satisfactory results, commonly used grease calcium-based grease, lithium-based grease, aluminum-based grease, and high-temperature grease, etc., the user can choose the most appropriate grease according to the specific circumstances. Sealing of rotary disc bearing The sealing of rotary disc bearing is to prevent the filled grease from leaking outward on one hand, and to prevent external dust, impurities and water from invading the inside of the bearing and affecting its normal work on the other hand. Because most of the turntable bearings in the heavy load low-speed work, so the bearing sealing type using rubber seals and labyrinth seal two structures. Rubber seal structure itself has a simple structure, occupies little space, sealing performance is reliable and other advantages and has been widely used, but its shortcomings are in the high temperature state when the rubber sealing lip is easy to early aging and loss of sealing, so in the high temperature working conditions under the conditions of the turntable bearings should be used in the labyrinth type seal. Three rows of combined roller slewing bearings (slewing bearing) three rows of roller slewing bearing with three seat ring up and down and radial raceways are separated, so that the load of each row of rollers can be determined exactly, able to withstand a variety of loads at the same time, is the largest of the four products in the bearing capacity of the shaft, radial dimensions of a larger structure is solid, especially suitable for the requirements of a larger diameter of the heavy machinery, such as bucket wheel excavators, Wheel cranes, marine cranes, ladle slewing and large tonnage truck cranes and other machinery. Double-row angular contact ball slewing bearings (slewing bearings) Double-row ball slewing bearings have three seating rings, steel balls and isolation blocks can be directly discharged into the upper and lower raceways, according to the force condition, the arrangement of the upper and lower rows of steel balls of different diameters. This kind of open type assembly is very convenient, the bearing angle of both upper and lower circular raceway is 90°, which can withstand great axial force and tilting moment. When the radial force is greater than 0.1 times the axial force raceway must be specially designed. The axial and radial dimensions of double-row ball slewing bearings are relatively large and the structure is sturdy, especially suitable for tower cranes, truck cranes and other loading and unloading machinery that require more than medium diameter. Single-row crossed roller slewing bearings (slewing bearings) Single-row crossed roller slewing bearings, consisting of two seat rings, compact structure, light weight, high manufacturing precision, small assembly clearance, high requirements for installation accuracy, roller for 1:1 cross arrangement, can simultaneously withstand the axial force, larger radial force and tilting moment. They are widely used in lifting transportation, engineering machinery and military products. Single-row four-point contact ball bearing slewing bearing (slewing bearing) Single-row four-point contact ball bearing slewing bearing consists of two seat rings, compact structure, light weight, steel ball and arc raceway four-point contact, can simultaneously withstand axial force, radial force and tilting moment. It can be used for rotary conveyors, welding machines, small and medium-sized cranes, excavators and other construction machinery. Production process flow chart Raw material → forging → turning → testing → heat treatment → grinding → testing → tempering → fine grinding → fine grinding → testing → assembly → loading inspection → packaging → packing → transportation → customers. Turntable slewing bearing material: 50Mn, 42CRMO, GCR15SIMN, 9CR18MO Turntable slewing bearing precision: P0, P6, P5, P4, P2 precision from low to high, the price will be from low to high. Turntable Slewing Bearing Uses: 1. Trailer: This type of bearing is used in a variety of occasions, the most important applications in the transportation industry, agricultural trailers, irrigation systems and airport luggage racks. In vehicle applications, the bearings transmit axial loads, radial loads and torque. In other applications, they mostly transmit axial loads. Jinyuan specializes in manufacturing turntable slewing bearings for trailers. 2. Wind power: Wind turbine bearings usually contain yaw bearings, pitch bearings, drive train bearings (main shaft and gearbox bearings). Jinyuan provides customers with yaw bearings and pitch bearings. The yaw bearings are installed at the connection between the tower and the nacelle, and the pitch bearings are installed at the root of each blade and the hub connection area. One set of yaw bearings and three sets of pitch bearings are used for each wind turbine. 3 Solar: Rotating solar panels are a good solution to increase energy. Thanks to the very compact design of the Golden Dollar bearings, supplying the largest solar electric field in Europe. 4. Medical equipment; j Jinyuan bearing developed high-precision, low noise, high life, high reliability series of medical equipment spindle turntable slewing bearings, has been widely used in the gamma knife, CT machine, nuclear magnetic *** vibration machine and other large medical equipment. 5. Robotics: Industrial robots and other equipment. Jinyuan turntable slewing bearings are installed in the joint parts of robots, and this structure can realize incredibly high tight rotary motion.
Edit the packaging of bearings
Bearing packaging is divided into inner packaging and outer packaging. Bearings are cleaned and rust-proofed after they are manufactured and inspected, and then put into the inner package to achieve the purpose of waterproof, moisture-proof, dust-proof, shock-proof, maintenance of the quality and precision of the bearings, as well as convenience of use and sale. Bearing packaging is divided into three categories according to the antirust period: ① short antirust period packaging: antirust period of 3 to 6 months, applicable to large quantities of shipments to the same subscriber, short-term will be put into use of the bearings. By mutual agreement, in order to facilitate the principle of use, the use of simple packaging. ② General rust-proof period packaging: rust-proof period of one year, applicable to general-purpose bearings. ③Long antirust period package: antirust period of two years, applicable to special-purpose and precision bearings. Bearing packaging materials within the polyethylene plastic tube (box), kraft paper, plain and wrinkled polyethylene composite paper, cardboard boxes, polyethylene or polyethylene plastic film, nylon fastening tape or plastic compilation of fastening tapes, waterproof high-strength plastic belts, burlap bags and so on. All of the above materials are required to ensure that the corrosion resistance of the material test qualified. Bearing the principle requirements of the internal packaging methods: ① miniature bearings: every 10 to 15 sets of bearings into a plastic tube, every 5 to 10 plastic tube into a carton (or bag, roll package). ② small and medium-sized bearings: multiple sets of bearings with polyethylene film, kraft paper or polyethylene composite paper for rolled packages; multiple sets of bearings into a plastic tube (box); single set of bearings packaged in polyethylene film bags, folding or sealing the mouth of the bag and then loaded into a carton. ③ large bearings: polyethylene film or polyethylene composite paper single set of packaging, and then into a carton; polyethylene film bag, a single set of packaging, after folding the bag, and then into a carton; single set into a special plastic box; single set of three-layer wrapping packaging: the inner layer of polyethylene film with a composite paper tape or tape, the middle layer of the fastening tape, the outer layer of waterproof penetration of plastic tape. Extra large-sized bearings: single set of three-layer wrapping Packing (as above); single-by-four-layer wrapping Packing: after the above three-layer wrapping Packing, the outermost layer is wrapped with a layer of burlap tape. Separable tapered roller bearings with diameter ≥150mm should be lined with polyethylene film before packing the inner and outer components, or the inner and outer components should be packed separately. Interchangeable cylindrical roller bearings with external diameter ≥150mm can be packaged separately because they are easy to be bruised in a set, and the internal and external components can be packaged separately. The general materials and requirements for the outer packaging of bearings are as follows: ① double corrugated cardboard boxes, the total weight of each box (gross weight) does not exceed 25kg, the box outside the plastic strapping; ② pegboard box (wooden box), the total weight of each box does not exceed 30kg, the box outside the blue steel strapping; ③ calcium corrugated plastic box, the total weight of each box does not exceed 25kg, the box love with plastic strapping. Bearing products with inner packaging into the box, should be lined with plastic bags or plastic film inside the box; box if the gap, need to use corrugated cardboard blocks, paper and other dry substances to fill.
Edit this paragraph bearing parts
(A) bearing parts general
1. bearing parts one of the parts of the rolling bearing, but does not include all the accessories. 2. bearing rings one of the parts of the rolling bearing, but does not include all the accessories. 2. Bearing ring A ring-shaped part of a centripetal rolling bearing with one or more raceways. 3. 3. bearing washers Ring-shaped parts of axial rolling bearings with one or several races. 4. flat retaining rings A separable ring. 4. flat retaining ring a detachable basically flat washer, with its inner or outer part as a centripetal cylindrical roller bearings outer ring or inner ring of a retaining edge. 5. tilted retaining ring (can be separated) a can be separated with "L" shape cross-section of the ring, with its outer part as the centerward cylindrical roller bearing inner ring of a retaining edge. 6. 6. center retaining ring a separable ring in roller bearings with two or more rows of rollers, used to isolate the two rows of rollers and to guide the rollers. 7. stop ring a constant stopping ring with a constant stopping ring, used to isolate the two rows of rollers and to guide the rollers. 7. stop ring A single-ported ring with a constant cross-section, fitted in an annular groove, which axially locates the rolling bearing in the housing or on the shaft. 8. locking ring A single ring with a constant cross-section, which is fitted in an annular groove as a retaining ring to keep the rollers or cage in the bearing. 9. 9. spacer ring is a ring-shaped parts, used between two bearing rings or bearing washers or between two halves of the bearing rings or between two halves of the bearing washers in order to maintain the specified axial distance between them. 10. 10. sealing ring by one or several parts of the ring-shaped cover, fixed in the bearing of a ring or gasket and contact with another ring or gasket or form a narrow labyrinth gap, to prevent lubricating oil leakage and the intrusion of foreign objects. 11. dust cover is a ring-shaped cover, usually made of thin sheet metal stamping, fixed in the bearing of a ring or gasket, and towards another set of rings or gasket extension, cover the internal space of the bearing, but not in contact with another set of rings or gaskets. 12. guard ring attached to the inner ring or a part of the shaft circle, the use of centrifugal force in order to enhance the rolling bearing to prevent the intrusion of foreign objects. 13. Rolling element A ball or roller that rolls between raceways. 14. 14. cage A bearing part that partially encloses all or some of the rolling elements and moves with them to isolate the rolling elements and usually guides the rolling elements and keeps them in the bearing.
(2) bearing parts structural characteristics
1. raceway rolling bearing load bearing part of the surface, used as rolling body rolling track. 2. straight raceway in perpendicular to the rolling body, the rolling body is used as a rolling track. 2. straight raceway in the plane perpendicular to the rolling direction of the bus is straight raceway. 3. Convexity raceway in the plane perpendicular to the rolling direction is continuous slightly convex curve of the basic cylindrical or conical raceway, in order to prevent in the roller and raceway contact with the stress concentration. 4. Spherical raceway The raceway is a part of the surface of the ball. 5. raceway The raceway of the ball bearing is in the shape of a groove, usually a circular cross-section, and its radius is slightly larger than the radius of the ball. 6. (groove) shoulder The side of the groove (raceway). 7. 7. Retaining edge A narrow shoulder protruding from the raceway surface parallel to the rolling direction. Used to support and guide the rolling element and keep it in the bearing. 8. surface of the guide cage The cylindrical surface of the bearing collar and washer, used to guide the cage in the radial direction. 9. ring (gasket) end surface perpendicular to the ring (gasket) axis line of the ring (gasket) surface. 10. Bearing bore Bore of rolling bearing inner ring or shaft collar 11. Cylindrical bore Bore of bearing or bearing part, whose busbar is basically straight and parallel to the axis of the bearing or bearing part. 12. 12. Conical bore The bore of the bearing or bearing part, whose busbar is basically straight and intersects with the axis of the bearing or the axis of the bearing part. 13. Outer surface of the bearing The outer surface of the outer ring or seat of the rolling bearing. 14. collar (gasket) chamfer The inner hole or outer surface of the bearing and the surface of the collar (gasket) connected with one end of the collar. 15. overrun groove in the bearing collar or bearing gasket retaining edge or flange root to facilitate the grinding of grooves or grooves. 16. sealing (contact) surface The surface in sliding contact with the sealing ring. 17. seal (dust cap) groove Grooves used to keep the bearing seal (dust cap). 18. stop ring groove Groove for retaining the stop ring. 19. lubrication groove A groove in a bearing part for the transport of lubricant. 20. 20. lubrication hole A hole in a bearing part for transferring lubricant to the rolling element.
(C) bearing rings
1. inner ring raceway on the outer surface of the bearing ring. 2. outer ring the raceway in the inner surface of the bearing ring. 3. tapered inner ring tapered roller. 3. tapered inner ring tapered roller bearings. 4. tapered outer ring The outer ring of tapered roller bearings. 5. double raceway tapered inner ring has double raceway tapered roller bearing inner ring. 6. double raceway tapered outer ring with double raceway tapered roller bearing outer ring. 7. wide inner ring at one end. 7. wide inner ring at one or both ends of the wider bearing inner ring, in order to improve the shaft in its bore guidance or installation of fasteners or seals to provide supplementary position. 8. locking inner ring a shoulder or a shoulder. 8. Locked inner ring A grooved ball bearing inner ring with all or part of the shoulder removed. 9. 9. Locked outer ring A grooved ball bearing outer ring with all or part of the shoulder removed. 10. 10. stamping outer ring by thin metal plate stamping, one end of the seal (seal stamping outer ring) or both ends of the open ring, generally points to the heart needle roller bearing outer ring. 11. flange outer ring has a flange, a shoulder all or part of the groove ball bearing inner ring. 11. flange outer ring has flange bearing outer ring. 12. the spherical outer ring has a spherical outer surface of the outer ring, in order to adapt to its axis line and the bearing housing axis line between the permanent angular displacement. 13. spherical outer seat ring used to adjust the outer ring and seat hole between the collar, has a spherical inner surface with the spherical outer surface of the outer ring. 14. outer spherical surface The outer surface of the outer ring of the bearing is part of the spherical surface. 15. tapered outer ring front retainer The retainer on the front of the raceway of the tapered outer ring is used to guide the rollers and to withstand the thrust of the large end face of the rollers. 16. center retainer The center retainer has double rollers and is used to guide the rollers. 16. middle retaining ring bearing collar with double raceway, such as double raceway tapered inner ring of the middle integral retaining edge.
(D) bearing washers
1. shaft ring bearing washer installed in the shaft. 2. seat ring bearing washer installed in the seat. 3. center ring both sides have raceway bearing washer, used for double row double direction thrust rolling bearing between two rows of rolling body. 4. center-aligning seat ring The seat ring which has spherical back, in order to adapt to the permanent angular displacement between its axis line and the axis line of the seat. 5. aligning seat washer for aligning seat ring and shell bearing thrust surface between the washer, its surface is concave spherical surface and aligning seat ring spherical back match.
(E) rolling body
1. ball spherical rolling body 2. roller axis of symmetry and perpendicular to the axis of any plane in the cross-section are round rolling body. 3. ball (roller) overall. 3. ball (roller) overall in a particular rolling bearing all the balls (rollers). 4. ball (roller) group Rolling bearing within a row of balls (rollers). 5. cylindrical roller The bus of the outer surface of the roller is basically straight and parallel to the axis of the roller. 6. Needle roller Small diameter cylindrical roller with large ratio of length to diameter, generally between 3 and 10 times the length of the diameter, but the diameter is usually not more than 5mm. the head of the needle roller can have several shapes. 7. conical roller The bus of the outer surface of the roller is basically straight and intersects with the axis of the roller, generally truncated cone. 8. (Convex) ball convex. 8. (Convex) Spherical Convex Roller The outer surface of a roller is convex in the plane containing its axis. 9. concave roller The outer surface of the roller is concave in the plane containing its centerline. 10. symmetric spherical roller The outer surface of a convex spherical roller is symmetric on both sides of a plane perpendicular to its axis through the middle of the roller. 11. asymmetric spherical roller The outer surface of a convex spherical roller is asymmetric on both sides of a plane perpendicular to its axis through the center of the roller. 12. Convex Roller The outer surface of a basically cylindrical or conical roller has a continuous slightly convex curve in the plane containing the axis line of the roller to prevent stress concentration at the end of the roller in contact with the raceway. 13. modified roller A roller with a slightly modified diameter at the end of the outer surface of the roller to prevent stress concentrations at the end of the roller in contact with the raceway. 14. Spiral Roller A roller made of a steel bar wound into a spiral shape. 15. Roller end surface The end surface which is basically perpendicular to the axis of the roller. 16. 16. Roller large face The face of a tapered roller or an asymmetric spherical roller with a large head. 17. 17. Roller small end face The end face of the small end of a tapered roller or asymmetric spherical roller. 18. Roller chamfer The surface where the outer surface of the roller meets the end face. (F) cage 1. wave-shaped cage including one or two wave-shaped ring parts of the rolling bearing cage. 2. 2. cage pocket (window) hole A hole or opening in a cage to accommodate one or more rolling elements. 3. cage beam A part of a cage that separates adjacent cage pockets. 4. cage claw A hole or opening in a cage to accommodate one or more rolling elements. 4. cage claw A cantilever arm that extends from a cage or half-cage. 5. cage strut Generally round. 5. cage strut Generally a cylindrical strut, which can be used through the axial hole of the roller. 6. 6. Retainer guided by the edge of the cage by the bearing collar or bearing washer on the shoulder surface for radial guidance (centering) of the cage. Help you find a professional oh, learn well!