阅读说明：本技术 空气箔片径向轴承以及设计方法、空压机电机、空压机 (Air foil radial bearing, design method, air compressor motor and air compressor ) 是由 尹丛勃 宋和国 陈雷 裴满 任军华 于 2020-05-26 设计创作，主要内容包括：本发明公开了一种空气箔片径向轴承以及设计方法、空压机电机、空压机；其属于新能源汽车空压机电机这一技术领域,其技术要点：从外到内,依次包括：外壳、第一箔片、支撑箔片、第二箔片；还包括：支撑弹性柱；所述凸起单元包括左腿部与右腿部,所述左腿部与所述右腿部的交点为顶点,所述左腿部与所述右腿部关于凸起单元的顶点—外壳的中心的连线对称；所述支撑弹性柱设置在凸起单元与内第一箔片之间,且支撑弹性柱与左腿部右腿部第一箔片接触。(The invention discloses an air foil radial bearing and a design method thereof, an air compressor motor and an air compressor; it belongs to this technical field of new energy automobile air compressor machine motor, its technical essential: from outside to inside, include in proper order: a housing, a first foil, a support foil, a second foil; further comprising: supporting the elastic column; the protrusion unit comprises a left leg part and a right leg part, the intersection point of the left leg part and the right leg part is a vertex, and the left leg part and the right leg part are symmetrical about a connecting line of the vertex of the protrusion unit and the center of the shell; the supporting elastic column is arranged between the protrusion unit and the inner first foil, and is in contact with the left leg portion and the right leg portion first foil.)

1. An air foil radial bearing comprising, in order from the outside to the inside: a housing, a first foil, a support foil, a second foil;

wherein the first foil is tightly attached to the inner surface of the shell and is provided with a notch extending along the axial direction;

wherein the support foil is arranged between the first foil and the second foil;

the supporting foil comprises a plurality of protruding units and a plurality of attaching parts; the protruding units and the attaching parts are alternately distributed, namely, the adjacent protruding units are connected through the attaching parts;

the attaching part is attached to the inner surface of the first foil;

the top of the bump unit is connected with a second foil;

it is characterized in that the preparation method is characterized in that,

further comprising: supporting the elastic column;

the protrusion unit comprises a left leg part and a right leg part, the intersection point of the left leg part and the right leg part is a vertex, and the left leg part and the right leg part are symmetrical about a connecting line of the vertex of the protrusion unit and the center of the shell; the supporting elastic column is arranged between the protrusion unit and the inner first foil, and is in contact with the left leg portion and the right leg portion first foil.

2. The air foil radial bearing of claim 1, wherein the supporting elastomeric columns are made of an elastomer.

3. The air foil radial bearing of claim 1, wherein said second foil is a unitary structure comprised of a circular arc segment and a connecting segment; the connecting section faces the shell; against the first foil.

4. The air foil radial bearing of claim 1, further comprising: an elastic sleeve, wherein the elastic sleeve is located inside the second foil.

5. An air foil radial bearing as claimed in claim 4, wherein said elastic sleeve is arranged inside said top foil, directly facing the rotation axis; the elastic sleeve is a cylindrical elastic sleeve and is made of stainless steel; the elastic sleeve is provided with a notch.

6. A method of designing an air foil radial bearing, wherein the air foil radial bearing is the air foil radial bearing of any one of claims 1 to 5;

it is characterized in that the preparation method is characterized in that,

the gap between the first foil and the second foil is marked as b; the radius of the bearing is marked as R;

the distance between the vertex of the convex unit and the supporting elastic column is recorded as s₁Namely, the following conditions are satisfied:

s≥s₁the convex unit and the supporting elastic column act together;

s<s₁the convex unit is active and the supporting elastic column is inactive;

the shape of the convex unit is a parabola;

under the above conditions, the shape of the supporting elastic column and the shape of the convex unit are as follows;

radius r of the supporting elastic column₀Comprises the following steps:

the shape of the convex unit is as follows:

with the direction of the center of the housing-the apex of the protruding element as the Y-axis, the direction perpendicular to the Y-axis as the X-axis, and the apex of the protruding element as the origin of the coordinate axis, the shape of the protruding element can be expressed by the following formula:

based on the above information, the supporting elastic columns and the protrusion units can be manufactured.

7. An air compressor motor, characterized in that the radial bearing used for the rotor is the air foil radial bearing of any one of claims 1 to 5.

8. An air compressor characterized by comprising the air compressor motor according to claim 7.

Technical Field

The invention relates to the field of new energy automobile air compressor motors, in particular to an air foil radial bearing, a design method, an air compressor motor and an air compressor.

Background

The air compressor is a core component of the new energy automobile and is used for supplying fuel gas and oxygen for the fuel cell.

The air compressor motor is a core power component in the air compressor, and the position of a rotor in the air compressor motor is limited by a radial bearing and a thrust bearing when the rotor moves.

Disclosure of Invention

The present invention addresses the above-described deficiencies of the prior art by providing an air foil radial bearing.

Another object of the present invention is to provide a method for designing an air foil radial bearing, which addresses the above-mentioned deficiencies of the prior art

Another object of the present invention is to provide an air compressor motor, which overcomes the above-mentioned shortcomings of the prior art.

Another object of the present invention is to provide an air compressor, which overcomes the above-mentioned shortcomings of the prior art.

The technical scheme of the invention is as follows:

an air foil radial bearing comprising, in order from the outside to the inside: the device comprises a shell, a first foil, a supporting elastic column, a second foil and an elastic sleeve;

wherein the first foil is tightly attached to the inner surface of the shell and is provided with a notch extending along the axial direction;

wherein the support foil is arranged between the first foil and the second foil;

wherein the elastic sleeve is located inside the second foil;

the supporting foil comprises a plurality of protruding units and a plurality of attaching parts; the protruding units and the attaching parts are alternately distributed, namely, the adjacent protruding units are connected through the attaching parts;

the attaching part is attached to the inner surface of the first foil;

the top of the bump unit is connected with a second foil;

the protrusion unit comprises a left leg part and a right leg part, the intersection point of the left leg part and the right leg part is a vertex, and the left leg part and the right leg part are symmetrical about a connecting line of the vertex of the protrusion unit and the center of the shell; the supporting elastic columns are arranged between the bump units and the inner first foil 200, and the supporting elastic columns 600 are in contact with the left leg 303, the right leg 304 and the first foil 200 (i.e. the elastic support columns are tangent to the left leg 303, the right leg 304 and the first foil 200).

Furthermore, the supporting elastic column is made of an elastic body.

Furthermore, the supporting elastic column is made of light materials.

Further, the second foil is of an integral structure and is composed of an arc section and a connecting section; the connecting section faces the shell; against the first foil.

Further, the elastic sleeve is disposed inside the top foil, which directly faces the rotation shaft; the elastic sleeve is a cylindrical elastic sleeve and is made of stainless steel; the elastic sleeve is provided with a notch.

A design method of an air foil radial bearing is provided, wherein a gap between a first foil and a second foil 400 is marked as b; the radius of the bearing is marked as R;

the distance between the vertex of the convex unit and the supporting elastic column is recorded as s₁Namely, the following conditions are satisfied: s is not less than s₁Protruding unit 301+ support bulletThe sexual columns work together; s<s₁The convex unit is active and the supporting elastic column is inactive;

the shape of the convex unit is a parabola;

under the above conditions, the shape of the supporting elastic column and the shape of the protruding unit need to be designed;

radius r of the supporting elastic column₀Comprises the following steps:

the shape of the convex unit is as follows:

with the direction of the center of the housing-the apex of the protruding element as the Y-axis, the direction perpendicular to the Y-axis as the X-axis, and the apex of the protruding element as the origin of the coordinate axis, the shape of the protruding element can be expressed by the following formula:

based on the above information, the supporting elastic columns and the protrusion units can be manufactured.

In this way, the supporting elastic columns can be inserted right between the protrusion units and the first foil.

A radial bearing adopted by a rotor of an air compressor motor is the air foil radial bearing.

An air compressor machine adopts aforementioned air compressor machine motor.

The beneficial effect of this application lies in:

(1) the basic invention points of the application are as follows: elastic supporting columns (which can be solid or hollow; made of light materials) are arranged in the convex units; different support rigidity under different deformation conditions is realized; in particular, the support foil 300 is protected, preventing the support foil 300 from being plastically deformed by being pressed.

(2) The second topic of the present application is the design of elastomeric support columns and boss units; that is, given the performance requirements of graded deformation, elastomeric support columns and raised elements need to meet what conditions to be made.

That is, without the second issue of investigation of the present application, the skilled artisan is not, in fact, aware of how to design and manufacture elastomeric support columns and projection units.

Drawings

The invention will be described in further detail with reference to examples of embodiments shown in the drawings, which are not intended to limit the invention in any way.

Fig. 1 is a schematic design diagram of an air foil radial bearing of example 1.

Fig. 2 is an enlarged view of a portion a of example 1.

Fig. 3 is a design view of a projection unit of embodiment 1.

Fig. 4 is a theoretical analysis diagram of a projection unit-supporting elastic column.

Detailed Description