CN1211592C - Anti-vibration center-regulating roller bearing - Google Patents

Abstract

The present invention relates to a vibration-resistant center-regulating roller bearing. A central blocked edge is arranged on an inner ring, and the surface of the central blocked edge, which corresponds to one end surface of a roller, is a conical surface. The diameters of two end surfaces of a spherical roller are unequal, and one end of the major diameter faces the central blocked edge. The outer circumference surfaces of corresponding parts of two retainers have the same shape with a spherical channel of an outer ring, and a spherical base surface with a certain guide gap is formed between the two retainers. The inner circumference surface is a cylindrical surface corresponding to the cylindrical surface of the central blocked edge, and a certain guide gap is preferably formed between the inner circumference surface and the cylindrical surface of the central blocked edge. The end surface of the roller is preferably a spherical base surface, and the central blocked edge corresponding to the roller has a spherical base surface. The vibration-resistant center-regulating roller bearing has the advantages of high load bearing capacity, high stability, shock resistance, strong vibration resistance performance, no sliding friction on the rolling surface and little rolling friction, and thus, the temperature rise and the bearing wear can be controlled. Compared with the service life of the conventional bearing, the service life of the vibration-resistant center-regulating roller bearing can be extended by more than 10 times.

Description

Anti-vibration center-regulating roller bearing

Technical field the present invention relates to a kind of bearing.

Background technique in recent years, the machinery of using vibration principle work is developed rapidly, as oscillating feeder, vibrating conveyor, vibrating sieve, vibromill, vibratory roller etc., the core component that the supporting of these vibrating machine axles is rotated is a bearing.And be the plain edition selfaligning roller bearing substantially at these bearings that mechanically use at present, promptly roller adopts symmetrical roller, and inner ring does not have centre rib, and retainer is the structure of one.This structural type is under some use condition, can show following deficiency: raceway unbalance loading, temperature rise, bottom abrasion is serious, the retainer easy-rupturing, copper powder is in rolling element and raceway face bonding etc., and unusual premature damage appears in bearing, thereby this kind structural type is being born axial force or is being had under the occasion of vibration, roller is in operation and can not be in the equilbrium running state, and the mode that retainer is directed can not play damping effect, and the one retainer interferes with each other two row rollers simultaneously; Thereby cause outer ring raceway, roller and retainer heavy wear, make the bearing premature damage.

Summary of the invention the object of the present invention is to provide a kind of bearing capacity height, good stability, shock-resistant, the anti-vibration performance strong, can control the anti-vibration center-regulating roller bearing of temperature rise and bearing wear preferably.The present invention mainly is on the basis of existing bearing, and roller, retainer and inner ring are improved definitely.Wherein establish centre rib on the inner ring, its face corresponding with roller end face is ball basal plane (or conical surface).Roller adopts non-symmetry structure, and promptly spherical roller both ends of the surface diameter does not wait, and major diameter one end is towards centre rib.The roller of this structure is being subjected to outer ring, inner ring, three masterpiece times spent of inner ring centre rib, and three power intersect at a bit, roller is in operation can be in state of equilibrium, and can make roller be in the ideal designs position all the time in running.Roll the simultaneously tangent line of bus pressure spot and the shaft axis of roller intersects at a bit, can make the on-stream pure rolling of doing of roller theoretically, lowers the on-stream temperature rise of bearing.For reducing the sliding friction of roller and centre rib, roller end face adopts the ball basal plane, and making contact form is a contact.In order to guarantee the on-stream mutual noninterference of two row rollers, retainer adopts two body structures, being about to retainer separates from the centre, become two retainers independently separately, both relatively part outer circumferential faces for identical with the spherical channel shape in outer ring, the spherical basal plane of certain guide clearance is only arranged between the two, therefore can make outer ring raceway guiding retainer, the guide surface precision height of this guiding, little to the retainer wearing and tearing, lubricants capacity forms the elastic fluid lubricant film than lip-guided abundance.Two body retainer inner peripheral surfaces are the cylndrical surface corresponding with the centre rib cylndrical surface, certain guide clearance is preferably only arranged between the two, thereby produce lubricant film at the volley, have certain vibration resistance.Can make centre rib and outer raceway groove jointly to the retainer guiding like this, i.e. bidirectional guiding, the vibration resistance of enhancing bearing.

The present invention has following advantage compared to existing technology: owing to fully take into account the operating mode characteristics that this bearing uses, adopted the structure that adapts, so this bearing has very high bearing capacity, and good stability, shock-resistant, the anti-vibration performance is strong; Rolling surface does not have kinetic friction, and rolling friction is also little; Therefore can control temperature rise and bearing abrasion preferably; Compare with plain edition working life and can improve more than 10 times.

Description of drawings

Fig. 1 is the generalized section of example 1 of the present invention

Fig. 2 is the generalized section of example 2 of the present invention

Fig. 3 is force analysis figure of the present invention.

Embodiment is established centre rib 2 on the inner ring 1 in the cross-sectional schematic of anti-vibration center-regulating roller bearing shown in Figure 1, its face corresponding with roller end face is the ball basal plane.Establish two row spherical rollers 3 between the Internal and external cycle, their both ends of the surface diameter does not wait, and major diameter one end is towards centre rib.Retainer 4 is two bodies, and their relative part outer circumferential face is identical with outer ring 5 spherical channel shapes, and the spherical basal plane of certain guide clearance is only arranged between the two.The retainer inner peripheral surface is the cylndrical surface corresponding with the centre rib cylndrical surface.In the cross-sectional schematic of anti-vibration center-regulating roller bearing shown in Figure 2, its structure is basic identical with example 1, just between two retainer inner peripheral surfaces and centre rib cylndrical surface certain guide clearance is only arranged.In anti-vibration center-regulating roller bearing force analysis figure shown in Figure 3, the outer ring intersects at one 9 to roller pressure line 7 and rib to 8 three directive effect power of roller pressure line to roller pressure line 6, inner ring.The tangent line 10,11 of inside and outside circle and roller point of contact and the shaft axis 12 of roller intersect on the bearing axis 13 1: 14.Centre rib ball basal plane radius of curvature 15 is greater than roller ball basal plane end face radius of curvature 16.The line 17 of roller radius of curvature central point promptly is roller maximum diameter position.

Claims (1)

1. anti-vibration center-regulating roller bearing, it is by inner ring, the outer ring, be located at that two row spherical rollers between the Internal and external cycle and retainer form, establish centre rib on the inner ring, its face corresponding with roller end face is the conical surface, spherical roller both ends of the surface diameter does not wait, major diameter one end is towards centre rib, two body retainers, their outer circumferential faces relatively partly are identical with the spherical channel shape in outer ring, the spherical basal plane that certain guide clearance is only arranged between the two, inner peripheral surface is the cylndrical surface corresponding with the centre rib cylndrical surface, it is characterized in that: between two retainer inner peripheral surfaces and centre rib cylndrical surface certain guide clearance is only arranged.

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