CN102011797B

CN102011797B - Micro flexible combined rolling bearing

Info

Publication number: CN102011797B
Application number: CN201010572193.XA
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: 2014-12-10
Anticipated expiration: 2030-12-03
Also published as: CN102011797A

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

Micro flexible compound rolling bearing

Technical field

The present invention relates to 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 science basis of bearing is: military service middle (center) bearing bears rotation torque and the Moment that rotating shaft or bearing transmit, and at bearing inner race or outer ring raceway, forms complicated stochastic and dynamic axial force and radial force effect; And by the contacting of roller and Internal and external cycle raceway, merge lubricated wearing and tearing, reduction temperature rise and the noise result of alleviating, make every effort to transmit steadily, efficiently the random dynamic loads of rotary component.

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

The key factor that affects 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 that roller contacts pattern with raceway and application multiple row roller is minimized to increase the method and technology of point of contact quantity; It is inconsistent that sliding friction results from roller and raceway surface of contact, Line of contact each point linear velocity, contacts pattern design improve with manufacturing by roller with raceway; Lubricated key effect is: reduce friction factor, avoid dry friction; Keep rolling contact membranes, avoid direct contact damage; The noise in absorption bearing working chamber.

But the weakness that the existence of the structure of existing rolling bearing own cannot overcome: inside and outside circle and raceway one; Roller contacts with the direct rigidity of raceway of inside and outside circle, and raceway cannot be done self adaption swing and/or the circumferentially changing of the relative positions with the variation of external force, and contact stress is high, and bearing operation stationarity is poor, noise is large, and low to the adaptive capacity of complex load, 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 object of this invention is to provide a kind of micro flexible compound rolling bearing, this kind rolling bearing is high to the strong adaptability of complex load condition, transmission stability and precision, contact stress is low, long service life.

The present invention realizes the technological scheme that its goal of the invention adopts: a kind of micro flexible compound rolling bearing, comprise three row and above inner ring, outer ring and inner ring and the rolling element between outer ring, its structural feature is: in described three row and above inner ring, outer ring, have at least between the inner ring of row and/or outer ring and rolling element and be 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 the curve bath on inner ring or outer ring; The edge of the curve bath of inner ring or outer ring is embedded with baffle ring; Clearance space between rolling element, raceway rings and curve bath is filled lubricating ester.

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

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

Meanwhile, because bearing is mainly by raceway rings and rolling element contact damage, make the Internal and external cycle body that is provided with raceway rings can adopt cheaper material manufacture, reduced manufacture cost; After raceway rings wearing and tearing, only need to replace raceway rings, without changing whole inner ring or outer ring, reduced O&M cost.

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

Accompanying drawing explanation

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

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

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

Fig. 4 is the sectional structure schematic diagram of the embodiment of the present 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 outer ring 3, between the inner ring 2 of three described row inner rings 2, one row of the centre in outer ring 3 and rolling element 5, 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 the curve bath 2A on inner ring 2; The edge of the curve bath 2A of inner ring 2 is embedded with baffle ring 4; Clearance space between rolling element 5, raceway rings 1 and curve bath 2A is filled lubricating ester.

Fig. 1 also illustrates, this example the rolling elements 5 of bearing outside two row be tapered roller, and middle one rolling element 5 being listed as is 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 outer ring 3, between the outer ring 3 of three described row inner rings 2, one row of the centre in outer ring 3 and rolling element 5, 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 the curve bath 3A on outer ring 3; The edge of the curve bath 3A of outer ring 3 is embedded with baffle ring 4; Clearance space between rolling element 5, raceway rings 1 and curve bath 3A is filled lubricating ester.

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

Embodiment three

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

Embodiment four

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

Embodiment five

A micro flexible compound rolling bearing, comprises inner ring, outer ring and the inner ring of four row and the rolling element between outer ring.In two row of outside: inner ring and outer ring all and between 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 the curve bath on inner ring or outer ring; The edge of the curve bath of inner ring or outer ring is embedded with baffle ring; Clearance space between rolling element, raceway rings and curve bath is filled lubricating ester.

Claims

1. a micro flexible compound rolling bearing, comprise three row or the above inner ring (2) of three row, rolling element (5) between outer ring (3) and inner ring (2) and outer ring (3), it is characterized in that: three described row and the above inner ring (2) of three row, in outer ring (3), have at least between the inner ring (2) of row and/or outer ring (3) and rolling element (5) and be provided with raceway rings (1), the roller surface (1A) of this raceway rings (1) contacts pairing with rolling element (5), the non-roller surface (1B) of raceway rings (1) contacts pairing with the curve bath (2A or 3A) on inner ring (2) or outer ring (3), self adaption by the non-roller surface of raceway rings (1) (1B) swings and/or circumferentially changing of the relative positions fine motion, thereby the random bend that roller is acted on roller surface (1A) is delivered to inner ring (2) and/or outer ring (3) flexibly with reversing dynamic load, form self adaption micro flexible power transmission mechanism, 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 between rolling element (5), raceway rings (1) and curve bath (2A or 3A) is filled lubricating ester.