CN102011797A

CN102011797A - Micro flexible combined rolling bearing

Info

Publication number: CN102011797A
Application number: CN 201010572193
Authority: CN
Inventors: 赵永翔
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University
Priority date: 2010-12-03
Filing date: 2010-12-03
Publication date: 2011-04-13
Anticipated expiration: 2030-12-03
Also published as: CN102011797B

Abstract

The invention relates to a micro flexible combined rolling bearing which comprises more than three columns of inner rings (2), outer rings (3) and a rolling body (5) between the inner rings (2) and the outer rings (3), wherein a rolling path ring (1) is arranged between at least one column of the inner rings (2) and/or the outer rings (3) in the at least three columns of the inner rings (2) and the outer rings (3) and the rolling body (5), the rolling path surface (1A) of the rolling path ring (1) is in contact with the rolling body (5) for pairing, and the non-rolling path surface (1B) of the rolling path ring (1) is in contact with an arc-shaped groove (2A or 3A) on the inner ring (2) or the outer ring (3) for pairing; a limit ring (4) is embedded on the edge of the arc-shaped groove (2A or 3A) of the inner ring (2) or the outer ring (3); and lubricating grease is filled in clearance space among the rolling body (5), the rolling path ring (1) and the arc-shaped groove (2A or 3A). The rolling bearing has the advantages of strong applicability to complex load conditions, high transmission stationarity and precision, low contact stress and long service life.

Description

The micro flexible compound rolling bearing

Technical field

The present invention relates to the mechanical transmission bearing.

Background technique

Bearing is the core component of supporting rotating shaft and load, and from the micron order bearing of supporting MEMS transmission shaft, the meter level bearing to the huge hydroelectric power arbor of supporting is widely used in various military and civilian electromechanical equipments.The academic basis of bearing is: the military service middle (center) bearing bears rotation torque and the moment of flexure effect that rotating shaft or bearing transmit, and forms complicated stochastic and dynamic axial force and radial force effect at bearing inner race or outer ring raceway; And, merge lubricated wearing and tearing, reduction temperature rise and the noise result of alleviating by the contacting of roller and Internal and external cycle raceway, make every effort to transmit steadily, efficiently the stochastic and dynamic load of rotary component.

The development of world's bearing technology has been experienced from sliding into the change of rolling: sliding bearing, and area of contact is big, and transmission capacity is big, but friction area is big, and frictional loss is big, and transmission efficiency is lower, wearing and tearing very easily takes place under the insufficient lubrication situation lost efficacy with temperature rise, and the life-span is short.Rolling bearing has the inherent advantage on its structure and the working principle, and area of contact is little, and frictional loss is little, the transmission efficiency height; But, under the insufficient lubrication situation, also come in contact easily to peel off and lost efficacy with temperature rise because of contact stress is big; Improve the bearing capacity angle from increasing area of contact, rolling bearing develops to multiple row, cylinder, needle bearing direction; From realizing the axial carrying angle, rolling bearing develops to deep groove ball bearing, tapered roller bearing and axial thrust bearing direction.Along with bearing capacity and improvement in performance, rolling bearing extensively replaces sliding bearing.

The key factor that influences rolling bearing bearing capacity, transmission performance and life-span comprises: contact stress, sliding friction and lubricated.Contact stress generally adopts post class roller and improves roller and contacts pattern with raceway and use the multiple row roller and be minimized with the method and technology that increases point of contact quantity; It is inconsistent that sliding friction results from roller and raceway surface of contact, the Line of contact each point linear velocity, contacts the pattern design with raceway by roller and improve with making; Lubricated key effect is: reduce friction factor, avoid dry friction; Keep the rolling contact membranes, avoid direct contact damage; The noise in absorption bearing working chamber.

But the weakness that the existence of structure of existing rolling bearing own can't overcome: inside and outside circle and raceway one; Roller contacts with the direct rigidity of the raceway of inside and outside circle, and raceway can't be done the self adaption swing and/or the circumferentially changing of the relative positions with the variation of external force, the contact stress height, and the bearing operation stationarity is poor, noise is big, and is low to the adaptive capacity of complex load, and the life-span is short.

Therefore, under high-performance, highi degree of accuracy, long lifetime requirement and high speed, heavy duty and complicated dynamic loading environment, existing bearing structure still needs to improve.

Summary of the invention

The purpose of this invention is to provide a kind of micro flexible compound rolling bearing, this kind rolling bearing is strong to the adaptability of complex load condition, transmission stability and precision height, low, the long service life of contact stress.

The present invention realizes that the technological scheme that its goal of the invention adopts is: a kind of micro flexible compound rolling bearing, comprise that three row reach above inner ring, outer ring and inner ring and the rolling element between the outer ring, its structural feature is: described three row reach to have at least in above inner ring, the outer ring between an inner ring that is listed as and/or outer ring and the rolling element and are provided with raceway rings, the roller surface of this raceway rings contacts pairing with rolling element, the non-roller surface of raceway rings contacts pairing with curve bath on inner ring or the outer ring; The edge of the curve bath of inner ring or outer ring is embedded with baffle ring; Clearance space packing lubrication ester between rolling element, raceway rings and the curve bath.

Compared with prior art, the invention has the beneficial effects as follows:

In existing multirow bearing, on a row inner ring and/or outer ring, increase raceway rings at least, replace the inner ring of these row and/or the raceway on the outer ring and with the rolling element contact friction; The another side of raceway rings (non-roller surface) is the arc groove pairing on cambered surface and bearing inner race and/or the outer ring, and the two forms swing under lubricated environment and/or circumferential changing of the relative positions fine motion cooperates, and swing fine motion degree is controlled by back-up ring.Therefore, roller acts on the random bend on the roller surface and reverses dynamic load, can be by the self adaption swing and/or the circumferentially changing of the relative positions fine motion of the non-roller surface of raceway rings, and be delivered to inner ring and/or outer ring flexibly, form self adaption micro flexible power transmission mechanism, reduced impact, noise and the contact stress of roller surface and rolling element, improved the stationarity, running accuracy of bearing operation and, prolonged bearing life the adaptability of complicated random load.Be particularly useful for high-performance, highi degree of accuracy, require and the bearing of big load, strong randomness load Service Environment at a high speed.

Simultaneously, because bearing mainly by raceway rings and rolling element contact damage, makes the Internal and external cycle body that is provided with raceway rings can adopt cheaper made, reduced manufacture cost; Only need to replace raceway rings after the raceway rings wearing and tearing, need not to change whole inner ring or outer ring, reduced the O﹠M cost.

Below in conjunction with the drawings and specific embodiments the present invention is done a step explanation.

Description of drawings

Fig. 1 is the sectional structure schematic representation of the embodiment of the invention one.

Fig. 2 is the sectional structure schematic representation of the embodiment of the invention two.

Fig. 3 is the sectional structure schematic representation of the embodiment of the invention three.

Fig. 4 is the sectional structure schematic representation of the embodiment of the invention four.

Specific implementation method:

Embodiment one

Fig. 1 illustrates, a kind of embodiment of the present invention is: a kind of micro flexible compound rolling bearing, comprise the rolling element 5 between three row inner rings 2, outer ring 3 and inner ring 2 and the outer ring 3, be provided with raceway rings 1 between the inner ring 2 of centre one row in described three row inner rings 2, the outer ring 3 and the rolling element 5, the roller surface 1A of this raceway rings 1 contacts pairing with rolling element 5, and the non-roller surface 1B of raceway rings 1 contacts pairing with the curve bath 2A on the inner ring 2; The edge of the curve bath 2A of inner ring 2 is embedded with baffle ring 4; Clearance space packing lubrication ester between rolling element 5, raceway rings 1 and the curve bath 2A.

Fig. 1 also illustrates, this example the rolling elements 5 of the bearing outside two row be tapered roller, and middle one rolling element 5 that is listed as is a spherical roller.

Embodiment two

Fig. 2 illustrates, a kind of embodiment of the present invention is: a kind of micro flexible compound rolling bearing, comprise the rolling element 5 between three row inner rings 2, outer ring 3 and inner ring 2 and the outer ring 3, be provided with raceway rings 1 between the outer ring 3 of centre one row in described three row inner rings 2, the outer ring 3 and the rolling element 5, the roller surface 1A of this raceway rings 1 contacts pairing with rolling element 5, and the non-roller surface 1B of raceway rings 1 contacts pairing with the curve bath 3A on the outer ring 3; The edge of the curve bath 3A of outer ring 3 is embedded with baffle ring 4; Clearance space packing lubrication ester between rolling element 5, raceway rings 1 and the curve bath 3A.

Obviously, this example is that raceway rings 1 is arranged between outer ring 3 and the rolling element 5 with embodiment one difference.

Embodiment three

Fig. 3 illustrates, and this example is basic identical with embodiment one, and different only is: the rolling element 5 of middle row is cylindrical roller.

Embodiment four

Fig. 4 illustrates, and this example is basic identical with embodiment two, and different only is: the rolling element 5 of middle row is cylindrical roller.

Embodiment five

A kind of micro flexible compound rolling bearing comprises inner ring, outer ring and the inner ring of four row and the rolling element between the outer ring.In the row of the outside two: inner ring and outer ring all and between the rolling element are provided with raceway rings, and the roller surface of this raceway rings contacts pairing with rolling element, and the non-roller surface of raceway rings contacts pairing with curve bath on inner ring or the outer ring; The edge of the curve bath of inner ring or outer ring is embedded with baffle ring; Clearance space packing lubrication ester between rolling element, raceway rings and the curve bath.

Claims

1. micro flexible compound rolling bearing, comprise three row or inner ring (2), outer ring (3) and inner ring (2) more than three row and the rolling element (5) between outer ring (3), it is characterized in that: have at least between an inner ring (2) that is listed as and/or outer ring (3) and the rolling element (5) in described three row and the inner ring (2) more than three row, outer ring (3) to be provided with raceway rings (1), the roller surface (1A) of this raceway rings (1) contacts pairing with rolling element (5), and the non-roller surface (1B) of raceway rings (1) contacts pairing with curve bath (2A or 3A) on inner ring (2) or outer ring (3); The edge of the curve bath of inner ring (2) or outer ring (3) (2A or 3A) is embedded with baffle ring (4); Clearance space packing lubrication ester between rolling element (5), raceway rings (1) and the curve bath (2A or 3A).