CN201771970U - Novel double-row spherical roller bearing - Google Patents

Abstract

The utility model discloses a novel double-row spherical roller bearing, which comprises an outer ring, an inner ring, a retainer and a roller, and is characterized in that the pocket of the retainer comprises a cylindrical surface and a spherical surface. The roller bearing has the benefits that the spherical surface of the roller is in fit with the spherical surface of the pocket of the retainer, so as to improve the guiding performance of the pocket to the roller and greatly restrict the concomitant swing deflection and sliding of the roller during the rotation. Therefore, the service lives of the retainer and a bearing raceway are prolonged, that is, the service life of the bearing is prolonged.

Description

Novel biserial spheric roller bearing

Technical field:

The utility model relates to a kind of bearing, specifically is a kind of biserial spheric roller bearing.

Background technique:

Biserial spheric roller bearing bearing capacity is big, can bear radial and axial both direction load again simultaneously, promptly can be used as positioning bearing, again can be as the bearing that moves about, so this bearing is widely used on the jumboes such as metallurgy rolling mill, mine disintegrator, pebble mill, vibrating sieve and oil field speed reducer, slurry pump.

The biserial spheric roller bearing structurally has a significant point, is exactly that the rolling element center line favours the bearing rotation centerline, and inclined angle alpha equals bearing contact angle.Just because of this, roller is in rotary course, and the linear velocity at roller two and angular velocity are all inequality, so roller will be accompanied by swing and slip rather than pure rolling in rotation process, this is the congenital deficiency of this bearing just.

Because the swing and the slip of roller will produce two adverse consequencess: the one, after the roller swing, the roller bus contacts crooked with the pocket hole, makes retainer tip and root very quick-wearing and fracture in advance; The 2nd, because making raceway shift to an earlier date fatigue, slip loses flesh.Shortened the working life of this bearing greatly.

Stipulate clearly among the spheric roller bearing design standard ZYB6-93 that Luoyang bearing research institute issues that this kind retainer pocket hole shape is that the cylndrical surface and the conical surface are formed, wherein:

Pocket hole depth L=(0.70～0.74) L _wL _w: roller length

Semi-cone angle $\mathrm{\θ}={\mathrm{Sin}}^{-1}\frac{{0.4L}_W}{R_W}$ R _w: the roller ball radius surface

The conical surface is dark $1=\frac{1}{2}(D_W-{D_W}^1)\÷\mathrm{tg\θ}$ D _w: the roller maximum diameter

D _w ¹: the roller top diameter

The profile that the retainer pocket hole bus of existing biserial spheric roller bearing is formed can not with the comprehensive engagement of roller sphere bus, but partial points contact, so both weakened the guide performance of retainer pocket hole, also do not had the crooked restrictive function of roller swing to roller.

Summary of the invention:

Problems such as the serious wear that the utility model exists at prior art, working life are short provide a kind of wearing and tearing that reduce greatly between roller and pocket hole, the novel biserial spheric roller bearing that increases the service life.

Technical solution of the present utility model is: a kind of novel biserial spheric roller bearing, comprise outer ring, inner ring, retainer, roller, and described retainer pocket hole is made up of cylndrical surface and sphere.

The sphere degree of depth h in described retainer pocket hole is roller length L _wHalf and roller end face and retainer pocket hole bottom gap ε sum, promptly The spherical radius in pocket hole equals the spherical roller spherical radius.

Bottom, described retainer pocket hole is 0.20～0.40mm with the gap ε of roller end face, preferred 0.30mm.

The utility model adds the conical surface with the shape in former retainer pocket hole by the cylndrical surface and is modified into the cylndrical surface and adds sphere, and the degree of depth of retainer pocket hole sphere is greater than the degree of depth of the existing retainer pocket hole conical surface.Spherical surface that improved like this benefit is a roller and retainer pocket hole sphere match, and has improved the guide performance of roller in the pocket hole like this, have also restricted roller widely in rotary course and the swing that is accompanied by is crooked and slide.Thereby prolonged the working life of retainer and the life-span of bearing race, just prolonged the working life of bearing.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the A-A sectional view of Fig. 1.

Embodiment:

Below in conjunction with the description of drawings specific embodiment of the utility model:

As shown in Figure 1, 2, a kind of novel biserial spheric roller bearing comprises outer ring, inner ring, retainer, roller, roller loading and unloading for convenience, and described retainer pocket hole is open, and section is the cylndrical surface outside the pocket hole, and inner segment is a sphere.The sphere degree of depth h in described retainer pocket hole is roller length L _wHalf and roller end face and retainer pocket hole bottom gap ε sum, promptly

The spherical radius in pocket hole equals the spherical roller spherical radius.Bottom, described retainer pocket hole is 0.30mm with the gap ε of roller end face.

The utility model is that with the main distinction of existing biserial spheric roller bearing retainer pocket hole shape is different, the size of retainer is identical with manufacturing process, it is boring cutter shape difference used when processing pocket hole, originally the shape of tool is that the cylndrical surface adds the conical surface, adds sphere and the present shape of tool is the cylndrical surface.On the boring machine of retainer pocket hole, just can process novel retainer with new cutter and come.

Claims (3)

1. a novel biserial spheric roller bearing comprises outer ring, inner ring, retainer, roller, it is characterized in that: described retainer pocket hole is made up of cylndrical surface and sphere.

2. a kind of novel biserial spheric roller bearing according to claim 1, its feature also is: the sphere degree of depth h in described retainer pocket hole is roller length L _wHalf and roller end face and retainer pocket hole bottom gap ε sum, promptly

The spherical radius in pocket hole equals the spherical roller spherical radius.

3. a kind of novel biserial spheric roller bearing according to claim 2, its feature also is: bottom, described retainer pocket hole is 0.20～0.40mm with the gap ε of roller end face.

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