CN103671506A

CN103671506A - Floating bearing for ultra-high-speed electric spindle

Info

Publication number: CN103671506A
Application number: CN201310585344.9A
Authority: CN
Inventors: 王东峰; 姜韶峰; 刘胜超
Original assignee: Luoyang Bearing Science and Technology Co Ltd
Current assignee: Luoyang Bearing Research Institute Inspection And Testing Co ltd
Priority date: 2013-11-21
Filing date: 2013-11-21
Publication date: 2014-03-26
Anticipated expiration: 2033-11-21
Also published as: CN103671506B

Abstract

The invention discloses a floating bearing for an ultra-high-speed electric spindle. The floating bearing comprises an inner ring, an outer ring, a cage and a rolling body, wherein the equation of the channel curvature radius Ri of the inner ring is as follows: Ri={B2+2(t+g)2}/4(t+g), the B is the width of the inner ring of the floating bearing, the g is the radial internal clearance of the floating bearing, and the t is the expansion amount of the outer ring of the floating bearing when the outer ring is heated to 100 DEG C, and the outer ring is equipped with double baffle edges. The floating bearing for the ultra-high-speed electric spindle has very good floating performance and high-speed performance, saves a sliding sleeve when mounted with the electric spindle, improves the high-speed performance of the electric spindle, enables the structure of the electric spindle to be more impact, reduces the cost and improves the efficiency.

Description

A kind of high-speed motorized spindles floating bearing

Technical field

The invention belongs to design bearing technical field, relate in particular to a kind of high-speed motorized spindles floating bearing.

Prior art

At present, development along with high speed, high-precision technology, the application of built-in type high-speed motorized spindles is more and more extensive, before general employing of built-in type electricity main shaft, step bearing is located, is supported, rear end bearing float support, between the bearing support of rear end and electric main shaft housing, must be set with a flip sleeve, to meet the axial float of electric main shaft axle.Flip sleeve is to inlay sleeve the inside with small ball, complex structure, and cost is higher, and work efficiency is low, and owing to having adopted flip sleeve, electric main shaft also must be taked complicated structure, and boundary dimension is larger.

Summary of the invention

In order to overcome above-mentioned defect, the invention provides a kind of high-speed motorized spindles floating bearing, this floating bearing can play well float performance and high speed performance, saved flip sleeve, improved the high speed performance of electric main shaft, make electric main shaft structure compacter, provide cost savings, improved efficiency.

In order to realize foregoing invention object, the present invention adopts technological scheme as described below:

A high-speed motorized spindles floating bearing, comprises inner ring, outer ring, retainer and the rolling element of matched together, bear inner ring grooved railway radius of curvature R _i={ B ²+ 2(t+g) ²}/4(t+g), described outer ring is provided with two ribs, wherein, and B: bearing inner race width; G: bearing end-play; T: swell increment during 100 ° of C of bearing outer ring heating.

Further, retainer adopts phenolic aldehyde laminated cloth pipe to make.

Further, rolling element adopts silicon nitride ceramic material.

Owing to adopting technique scheme, the present invention has following superiority:

Floating bearing of the present invention can play well float performance and high speed performance, when installing with electric main shaft, has saved flip sleeve, has improved the high speed performance of electric main shaft, makes electric main shaft structure compacter, provides cost savings, and has improved efficiency.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

In figure: 1-inner ring; 2-retainer; 3-rolling element; 4-outer ring.

Embodiment

Below in conjunction with drawings and Examples, the present invention is further detailed explanation.

As shown in Figure 1, a kind of high-speed motorized spindles floating bearing, comprises inner ring 1, outer ring 4, retainer 2 and the rolling element 3 of matched together, bear inner ring grooved railway radius of curvature R _i={ B ²+ 2(t+g) ²}/4(t+g), described outer ring is provided with two ribs, wherein, and B: bearing inner race width; G: bearing end-play; T: swell increment during 100 ° of C of bearing outer ring heating.

In order further to adapt to needs at a high speed, retainer 2 adopts phenolic aldehyde laminated cloth pipe to make; Rolling element 3 adopts silicon nitride ceramic material.

Claims

1. a high-speed motorized spindles floating bearing, comprises and it is characterized in that inner ring (1), outer ring (4), retainer (2) and the rolling element (3) of matched together: inner ring (1) groove curvature radius R _i={ B ²+ 2(t+g) ²}/4(t+g), described outer ring (4) are provided with two ribs, wherein, and B: bearing inner race width; G: bearing end-play; T: swell increment during 100 ° of C of bearing outer ring heating.

2. high-speed motorized spindles floating bearing as claimed in claim 1, is characterized in that: retainer (2) adopts phenolic aldehyde laminated cloth pipe to make.

3. high-speed motorized spindles floating bearing as claimed in claim 1, is characterized in that: rolling element (3) adopts silicon nitride ceramic material.