CN217002704U - Miniature, sealed, ceramic, high-speed bearing - Google Patents

Abstract

The utility model provides a miniature, sealed, ceramic, high-speed bearing. The non-equal-height steel outer ring and a mechanical part shell are installed and matched to bear axial load and radial load, the outer side of the non-equal-height steel outer ring is provided with an asymmetric arc angle, and the inner side of the non-equal-height steel outer ring is provided with a non-equal straight slope capable of locking a ball; the asymmetric steel inner ring and a mechanical piece shaft are assembled together to bear partial radial force and partial axial force, a left rib and a right rib of the asymmetric steel inner ring are of unequal-height structures, a slope angle of 30 degrees is arranged above the left rib, and a slope angle of 2 +/-10 degrees is arranged below the left rib; the centrifugal force of the phenolic rubberized fabric tube JB4037 retainer is set to be 15 degrees, the phenolic rubberized fabric tube JB4037 retainer is symmetrically provided with straight pocket holes, ceramic silicon nitride rolling elements are arranged in the straight pocket holes, and the double-lip rubber sealing rings are arranged at the contact positions of the unequal-height steel outer rings and the asymmetric steel inner rings.

Description

Miniature, sealed, ceramic, high-speed bearing

Technical Field

The utility model relates to the field of machinery, in particular to a miniature, sealed, ceramic and high-speed bearing.

Background

The micro mechanical device generally requires that the bearing has a tiny shape and a thin thickness, the basic size is smaller than the normal size of the bearing, the limited revolution is required to be high, the sealing performance is good, and only the individual model of the NSK company in Japan exists internationally; the product structure is not optimized; most manufacturers import the bearing, various performance indexes of the miniature, sealed, ceramic and high-speed bearings produced and manufactured in China at present can not meet the requirements, the phenomenon of early fatigue spalling is serious, the service performance of the bearing is directly influenced, the service life of the bearing is shortened, and the phenomena of high noise and inflexible rotation are presented. The import bearing achieves some good effects, but the enterprise is burdened with expensive bearing cost every year. The domestic miniature, sealed, ceramic and high-speed bearing series products do not exist, and a bearing product which has various technical indexes reaching the international level and replaces the import is urgently needed in the market.

Disclosure of Invention

The utility model aims to provide a miniature, sealed, ceramic and high-speed bearing with high limit revolution, good rigidity, low vibration, low noise, high rotation precision and small friction.

The purpose of the utility model is realized as follows: the mechanical part comprises an unequal-height steel outer ring, an asymmetric steel inner ring, a ceramic silicon nitride rolling body, a phenolic aldehyde rubberized fabric tube JB4037 retainer and a double-lip rubber sealing ring, wherein the unequal-height steel outer ring and a mechanical part shell are installed and matched to bear axial load and radial load, an asymmetric arc angle is arranged on the outer side of the unequal-height steel outer ring, and an unequal straight slope capable of locking a ball is arranged on the inner side of the unequal-height steel outer ring; the asymmetric steel inner ring and a mechanical part shaft are assembled together to bear partial radial force and partial axial force, a left flange and a right flange of the asymmetric steel inner ring are of unequal-height structures, a 30-degree slope angle is arranged above the left flange, and a 2 +/-10' -degree slope angle is arranged below the left flange; the centrifugal force of the phenolic adhesive cloth pipe JB4037 retainer is set to be 15 degrees, straight pocket holes are symmetrically formed in the phenolic adhesive cloth pipe JB4037 retainer, ceramic silicon nitride rolling elements are arranged in the straight pocket holes, double-lip rubber sealing rings are arranged at the contact positions of unequal-height steel outer rings and asymmetric steel inner rings, a steel skeleton with the outer diameter of 7 degrees is arranged in the straight pocket holes, a sharp-angled bulge with the inclination angle of 15 degrees is arranged at the upper end of each double-lip rubber sealing ring, the lower end of each double-lip rubber sealing ring is provided with a trapezoidal concave bulge with the lower left corner of 60 degrees, and the inclination angle of 30 degrees is arranged on the outer side of the lower end of each double-lip rubber sealing ring.

The utility model establishes a complete dynamic model, reveals a high-speed bearing slipping mechanism and obtains a high-speed bearing slipping condition; disclosing the change rule of a raceway oil supply layer and constructing a multi-factor coupling full-scale lubrication contact model; revealing the influence rule of each factor on the lubricating performance; the change rule of the high-speed lubricating oil film under the oil-gas lubricating condition is researched. A thermal analysis model of the rolling bearing is constructed, the temperature rise change rule of the high-speed bearing is researched, and a thermal failure mechanism of the high-speed bearing is disclosed. The main parameters of the overall design are based on the latest design concept, and can be compared favorably with similar products of the NSK bearing company in Japan; the tolerance grades of the Si3N4 ceramic silicon nitride rolling body P4 and P2 are the limit value standards reaching Z3 and V4; the structural design is optimized, the bearing ring meets the series of size standards of ISO19 and ISO10, and the high-quality steel bearing ring and the unequal-height steel outer ring are provided with unequal-height slopes and locking ball heights; the material of the JB4037 retainer of the phenolic adhesive cloth pipe adopts the JB 4037; the ceramic silicon nitride rolling elements are generally more in number, the width of a cross beam of the retainer is narrow, the weight is reduced, the pocket holes are straight holes after optimization, the limit revolution is high, the rigidity is good, the vibration is low, the noise is low, the rotation precision is high, and the friction is small. The normal operation of the bearing is ensured; long service life, corrosion resistance, good sealing effect, convenient installation and low cost. A special heat treatment process is adopted.

The beneficial effects of the utility model include:

1) the ceramic silicon nitride rolling body is made of a ceramic silicon nitride Si3N4 material, so that the ceramic silicon nitride rolling body is corrosion-resistant, self-lubricating, long in service life, high in bearing capacity and high in rigidity; 2) the tolerance grades of P4 and P2 can ensure that the bearing has good running precision and short running-in time; 3) the structural design is optimized to facilitate installation; 4) conform to ISO19 and ISO10 size series standards, have compact cross-sectional areas; 5) the high-quality bearing steel sleeve prolongs the service life of the bearing and has excellent corrosion resistance; 6) the outer guide structure has high speed performance; 7) the unequal-height steel outer rings are arranged at unequal heights, so that the installation time can be saved; 8) the shape of the raceway is closely related to the action of centrifugal force, and the flowing and backfilling of a lubricating medium are under the action of the centrifugal force and surface tension, so that the maintenance of the bearing is reduced, and the oil lubrication is optimized; 9) the unequal-height steel outer ring can bear axial load or radial load (load limited to one direction) 10) and a phenolic adhesive cloth pipe JB4037 is adopted, so that the mass is reduced, and the limit revolution is improved by 30%; 11) the optimized JB4037 retainer structure of the phenolic rubberized fabric tube can provide good lubrication for the contact area of the ceramic silicon nitride rolling body and the channel. 12) The double-lip rubber sealing ring can prevent dust.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a JB4037 retainer of a phenolic rubberized fabric tube;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic structural view of an unequal-height steel outer ring;

FIG. 5 is a schematic view of an asymmetric steel inner ring structure;

FIG. 6 is a schematic structural view of a double-lip rubber seal ring;

FIG. 7 is a schematic view of a steel skeleton structure.

Detailed Description

The utility model is further described with reference to the following figures and specific examples:

with reference to fig. 1-7, the present embodiment includes an unequal-height steel outer ring 1, an asymmetric steel inner ring 2, a ceramic silicon nitride rolling element 4, a phenolic adhesive cloth tube JB4037 retainer 3, and a double-lip rubber seal ring 5, the unequal-height steel outer ring 1 and a mechanical component housing are mounted and matched to bear an axial load and a radial load, an asymmetric arc angle is arranged on the outer side of the unequal-height steel outer ring 1, and an unequal straight slope capable of locking balls is arranged on the inner side of the unequal-height steel outer ring; the asymmetric steel inner ring 2 and a mechanical piece shaft are assembled together to bear partial radial force and partial axial force, a left rib and a right rib of the asymmetric steel inner ring 2 are of unequal-height structures, a slope angle of 30 degrees is arranged above the left rib, and a slope angle of 2 +/-10 degrees is arranged below the left rib; the centrifugal force of the phenolic adhesive cloth pipe JB4037 retainer 3 is set to 15 degrees, straight pocket holes are symmetrically formed in the phenolic adhesive cloth pipe JB4037 retainer 3, ceramic silicon nitride rolling elements 4 are arranged in the straight pocket holes, the double-lip rubber sealing ring 5 is arranged at the contact part of the unequal-height steel outer ring 1 and the asymmetric steel inner ring 2, a steel skeleton 6 with the outer diameter of 7 degrees is arranged in the straight pocket holes, the upper end of the double-lip rubber sealing ring 5 is provided with a sharp-corner bulge with the inclination angle of 15 degrees, the lower end of the double-lip rubber sealing ring is provided with a trapezoid concave bulge with the lower left corner of 60 degrees, and the outer side of the lower end of the double-lip rubber sealing ring 5 is provided with the inclination angle of 30 degrees.

Claims (1)

1. A miniature, sealed, ceramic, high-speed bearing, characterized by that it includes unequal high steel outer races, asymmetric steel inner races, ceramic silicon nitride rolling element, phenolic rubberized fabric tube JB4037 holder and two lip rubber seal rings, unequal high steel outer races and mechanical part shell are installed and cooperated and born axial load and radial load, the unequal high steel outer races outside have asymmetric arc angle, inside have can lock unequal straight slope of ball; the asymmetric steel inner ring and a mechanical part shaft are assembled together to bear partial radial force and partial axial force, a left flange and a right flange of the asymmetric steel inner ring are of unequal-height structures, a 30-degree slope angle is arranged above the left flange, and a 2 +/-10' -degree slope angle is arranged below the left flange; the centrifugal force of phenolic adhesive cloth pipe JB4037 holder sets up to 15 degrees, phenolic adhesive cloth pipe JB4037 holder symmetry is provided with straight pocket hole, the setting of pottery silicon nitride rolling element is in straight pocket hole, the setting of two lip rubber seal ring is in the steel outer lane of inequality height, asymmetric steel inner lane contact department, wherein be provided with the steel skeleton of external diameter 7 degrees, two lip rubber seal ring upper end is provided with the closed angle arch of 15 degrees angle of inclination, the lower extreme is provided with the trapezoidal concave rise of lower left corner 60 degrees, two lip rubber seal ring lower extreme outside is provided with 30 degrees angles of inclination.

Images