阅读说明：本技术 一种抗偏斜的起动机轴承及其滚子的制造方法 (Anti-deflection starter bearing and manufacturing method of roller thereof ) 是由 冯小川 杨晓峰 刘璐 公平 李海涛 王晔 于庆杰 田铭 张振宇 刘森 高春月 于 2020-12-23 设计创作，主要内容包括：一种抗偏斜的起动机轴承及其滚子的制造方法,涉及机械加工技术领域。为解决现有的航空轴承起动机轴承无法实现偏斜5′的功能需求,由于工作过程中轴的挠曲变形,使得轴承工作不稳定,导致航空起动机的可靠性较低的问题。内圈的外表面上套设有外圈,且内圈与外圈之间设有保持架,保持架沿圆周外表面均匀的加工有多个通孔,且每个通孔的内部嵌有一个滚子；外圈的宽度小于内圈。本发明适用于机械加工技术领域。(An anti-deflection starter bearing and a manufacturing method of a roller thereof relate to the technical field of machining. The problem that the existing aviation bearing starter bearing cannot meet the function requirement of deflection 5' and the reliability of the aviation starter is low due to unstable work of the bearing caused by deflection deformation of a shaft in the working process is solved. The outer surface of the inner ring is sleeved with an outer ring, a retainer is arranged between the inner ring and the outer ring, a plurality of through holes are uniformly processed on the retainer along the circumferential outer surface, and a roller is embedded in each through hole; the width of the outer ring is smaller than that of the inner ring. The invention is suitable for the technical field of machining.)

1. A deflection-resistant starter bearing, characterized by: comprises an outer ring (1), rollers (2), a retainer (3) and an inner ring (4);

the outer ring (1) is sleeved on the outer surface of the inner ring (4), a retainer (3) is arranged between the inner ring (4) and the outer ring (1), a plurality of through holes are uniformly processed on the retainer (3) along the outer surface of the circumference, and a roller (2) is embedded in each through hole; the width of the outer ring (1) is smaller than that of the inner ring (4); the roller (2) adopts a correction line roller.

2. A deflection-resistant starter bearing as set forth in claim 1 wherein: the outer diameter of the outer ring (1) is 30mm, and the width of the outer ring is 8 mm.

3. A deflection-resistant starter bearing as set forth in claim 1 wherein: the outer ring (1) and the inner ring (4) are both made of double-vacuum Cr4Mo4V steel.

4. A deflection-resistant starter bearing as set forth in claim 1 wherein: the convexity of the roller (2) is 8-12 microns.

5. A deflection-resistant starter bearing as set forth in claim 2 wherein: an oil groove is formed in the outer ring (1) along the circumferential direction.

6. The method of claim 1, wherein the step of forming a roller in a deflection resistant starter bearing comprises: the specific method comprises the following steps:

step one, calculating the range of the arc radius of the roller (2) according to the convexity requirement and the length of the straight line segment of the roller (2);

secondly, determining the arc radius of a bus of the guide roller according to the calculated range of the arc radius of the roller (2);

deducing guide roller bus polishing data according to the bus arc radius, and polishing the guide roller;

and step four, the roller (2) advances between the two convexity guide rollers in a penetrating manner, and the shape of the generatrix of the roller (2) is ground by means of vibration and pressure of the oilstone, so that the processing of the roller (2) is completed.

Technical Field

The invention relates to the technical field of machining, in particular to an anti-deflection starter bearing and a manufacturing method of a roller of the anti-deflection starter bearing.

Background

At present, the aviation starter bearing can not meet the functional requirement of deflection 5', and the analysis reason is as follows: firstly, when the bearing is used, the bearing is influenced by the characteristics of a mechanism, and the existing unbalance loading causes the deflection of the bearing; and secondly, the deflection deformation of the shaft in the working process enables the bearing to work unstably, and the deflection resistance of the bearing is insufficient, so that the bearing fails early.

In conclusion, the existing aviation bearing starter bearing cannot meet the function requirement of the deflection 5', and the problem of low reliability of the aviation starter is caused by unstable operation of the bearing due to the deflection deformation of the shaft in the working process.

Disclosure of Invention

The invention provides an anti-deflection starter bearing and a manufacturing method of a roller thereof, aiming at solving the problems that the existing aviation bearing starter bearing can not realize the function requirement of deflection 5', and the reliability of an aviation starter is lower due to the unstable work of the bearing caused by the deflection deformation of a shaft in the working process.

The invention relates to an anti-deflection starter bearing, which comprises an outer ring, a roller, a retainer and an inner ring; the outer surface of the inner ring is sleeved with an outer ring, a retainer is arranged between the inner ring and the outer ring, a plurality of through holes are uniformly processed on the retainer along the circumferential outer surface, and a roller is embedded in each through hole;

furthermore, the width of the outer ring is smaller than that of the inner ring;

further, the outer diameter of the outer ring is 30mm, and the width of the outer ring is 8 mm;

furthermore, the outer ring and the inner ring are both made of double vacuum Cr4Mo4V steel;

furthermore, the roller adopts a correction line roller;

further, the convexity of the roller is 8-12 micrometers;

furthermore, an oil groove is formed in the outer ring along the circumferential direction;

the invention relates to a method for manufacturing a roller in a deflection-resistant starter bearing, which comprises the following specific steps:

step one, calculating the range of the arc radius of the roller according to the convexity requirement of the roller and the length of the straight line segment;

secondly, determining the arc radius of a bus of the guide roller according to the calculated range of the arc radius of the roller;

deducing guide roller bus polishing data according to the bus arc radius, and polishing the guide roller;

and step four, the roller advances between the two convexity guide rollers in a penetrating manner, and the shape of the snap-roller line is ground by means of vibration and pressure of the oilstone, so that the processing of the roller is finished.

Compared with the prior art, the invention has the following beneficial effects:

the roller path structure overcomes the defects of the prior art, the outer ring is sleeved on the outer surface of the inner ring, the retainer is arranged between the inner ring and the outer ring, a plurality of through holes are uniformly processed on the retainer along the circumferential outer surface, a roller is embedded in each through hole, the width of the outer ring is smaller than that of the inner ring, and the effective length of the roller path is increased; the shape optimization of the roller is combined, the length of the straight line segment is changed, the convexity of the roller is increased, the deflection resistance of the bearing is improved to be more than 7', and the use safety margin is increased; the convexity of the roller is 8-12 microns, dynamic balance and static balance control is carried out on the retainer, stability of the retainer during high-speed operation is improved, working stability of the bearing is guaranteed, shaft deflection deformation in the working process is avoided, and therefore reliability of the aviation starter is improved.

Drawings

FIG. 1 is a cross-sectional view of a deflection-resistant starter bearing in accordance with the present invention;

FIG. 2 is a schematic diagram of the use of a deflection resistant starter bearing according to the present invention;

FIG. 3 is a schematic view of the manufacture of a roller in a deflection resistant starter bearing according to the present invention.

Detailed Description

The first embodiment is as follows: the present embodiment is described with reference to fig. 1 and 2, and the anti-deflection starter bearing according to the present embodiment includes an outer ring 1, rollers 2, a cage 3, and an inner ring 4; the outer surface of the inner ring 4 is sleeved with the outer ring 1, a retainer 3 is arranged between the inner ring 4 and the outer ring 1, a plurality of through holes are uniformly processed on the retainer 3 along the circumferential outer surface, and a roller 2 is embedded in each through hole;

according to the specific embodiment, the anti-deflection bearing is placed on the middle shaft of the space starter, and the anti-deflection bearing is arranged between the thrust ball bearing and the flywheel.

The second embodiment is as follows: the present embodiment is described with reference to fig. 1, and the present embodiment is a further limitation of the bearing according to the first embodiment, and the width of the outer ring 1 is smaller than that of the inner ring 4 in the anti-deflection starter bearing according to the present embodiment;

in the specific embodiment, the width of the outer ring 1 is smaller than that of the inner ring 4, the length of a straight line segment is changed, the convexity of a roller is increased, the deflection resistance of the bearing is improved by more than 7', and the use safety margin is increased;

the rotating speed reaches 66000r/min, the over-rotation reaches 72000r/min, the running stability of the bearing is higher, and the dynamic balance of the retainer and the rolling body of the bearing have higher precision.

The third concrete implementation mode: the present embodiment will be described with reference to fig. 1, which is a further limitation of the bearing according to the second embodiment, and the outer ring 1 of the anti-deflection starter bearing according to the present embodiment has an outer diameter of 30mm and a width of 8 mm;

in the specific embodiment, the outer diameter of the outer ring 1 is 30mm, the width of the outer ring is 8mm, and the dynamic strength and the static strength of the bearing are improved.

The fourth concrete implementation mode: the present embodiment will be described with reference to fig. 1, which is a further limitation of the bearing according to the first embodiment, and in the deflection-proof starter bearing according to the present embodiment, the outer ring 1 and the inner ring 4 are both made of double vacuum Cr4Mo4V steel;

in the specific embodiment, the outer ring 1 and the inner ring 4 are made of double-vacuum Cr4Mo4V steel, so that the working temperature of the bearing can reach 250 ℃; during non-working hours, the minimum temperature for storage may reach-40 ℃.

The fifth concrete implementation mode: the present embodiment will be described with reference to fig. 1, and the present embodiment is a further limitation of the bearing according to the first embodiment, and the anti-deflection starter bearing according to the present embodiment employs a correction linear roller as the roller 2;

in the embodiment, the roller 2 is a modified linear roller, so that the bearing capacity is met, and the edge stress is reduced.

The sixth specific implementation mode: the present embodiment is described with reference to fig. 1, and the present embodiment is a further limitation of the bearing according to the fifth embodiment, and the anti-deflection starter bearing according to the present embodiment has a convexity of the roller 2 of 8 to 12 μm;

according to the specific embodiment, the convexity of the roller is 8-12 microns, dynamic balance and static balance control is performed on the retainer, the stability of the retainer during high-speed operation is improved, the bearing is guaranteed to work stably, and the flexural deformation of a shaft in the working process is avoided, so that the reliability of the aviation starter is improved.

The seventh embodiment: the present embodiment will be described with reference to fig. 1, which is a further limitation of the bearing according to the first embodiment, and the anti-deflection starter bearing according to the present embodiment is provided with an oil groove in the outer ring 1 in the circumferential direction;

in the specific embodiment, the oil grooves are arranged in the outer ring 1 along the circumferential direction, so that the effective length of the roller path is increased; the shape optimization of the roller is combined, the length of the straight line segment is changed, the convexity of the roller is increased, the deflection resistance of the bearing is improved by more than 7', and the use safety margin is increased.

The specific implementation mode is eight: the present embodiment will be described with reference to fig. 3, which is a further limitation of the bearing according to the first embodiment, and a method for manufacturing a roller in a deflection-resistant starter bearing according to the present embodiment includes the following specific steps:

step one, calculating the range of the arc radius of the roller 2 according to the convexity requirement and the length of the straight line segment of the roller 2;

secondly, determining the arc radius of a bus of the guide roller according to the calculated range of the arc radius of the roller 2;

deducing guide roller bus polishing data according to the bus arc radius, and polishing the guide roller;

and step four, the roller 2 advances between the two convexity guide rollers in a penetrating manner, and the shape of a bus of the roller 2 is ground by means of vibration and pressure of the oilstone, so that the processing of the roller 2 is completed.