CN218440205U

CN218440205U - Rotor thrust bearing structure

Info

Publication number: CN218440205U
Application number: CN202222722529.7U
Authority: CN
Inventors: 牛国夷
Original assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Current assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Priority date: 2022-10-17
Filing date: 2022-10-17
Publication date: 2023-02-03
Anticipated expiration: 2032-10-17

Abstract

The utility model relates to a rotor drive technical field discloses a rotor thrust bearing structure. The rotor thrust supporting structure comprises a first rotor and a second rotor, wherein a first contact surface is arranged at the end part of the first rotor along the axial direction, and the first contact surface is a plane; a second contact surface is arranged at the end part of the second rotor along the axial direction and is abutted against the first contact surface, a through oil groove is arranged on the second contact surface, and the bottom of the oil groove is connected with the second contact surface through a transition surface; the lubricating oil in the oil groove can move to the position between the first contact surface and the second contact surface through the transition surface. The utility model discloses cancel antifriction bearing or slide bearing among the prior art, simplified the connection structure of first rotor and second rotor, reduced spare part quantity, reliability and security when having improved first rotor and second rotor operation, reduction in production cost.

Description

Rotor thrust bearing structure

Technical Field

The utility model relates to a rotor drive technical field especially relates to a rotor thrust bearing structure.

Background

At present, as shown in fig. 1, two rotors 10 moving relatively and connected need to be connected by a bearing 20 for auxiliary transmission, and the bearing 20 is a rolling bearing or a sliding bearing, which eliminates thrust and friction between the two rotors 10. The prior art has the following defects that the structure of installing the rolling bearing or the sliding bearing between the two rotors 10 increases the processing cost and the assembling cost of parts, and meanwhile, the rolling bearing or the sliding bearing is easy to damage, so that the operation risk is increased.

Based on this, a rotor thrust supporting structure is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

Based on above, an object of the utility model is to provide a rotor thrust bearing structure has simplified the connection structure of first rotor and second rotor, reduces spare part quantity, has improved the reliability and the security of operation, reduction in production cost.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a rotor thrust support structure comprising:

the end part of the first rotor along the axial direction is provided with a first contact surface, and the first contact surface is a plane;

the end part of the second rotor along the axial direction is provided with a second contact surface which is abutted against the first contact surface, the second contact surface is provided with a through oil groove, and the bottom of the oil groove is connected with the second contact surface through a transition surface; the lubricating oil in the oil groove can move to the position between the first contact surface and the second contact surface through the transition surface.

As a preferred technical scheme of rotor thrust bearing structure, the oil groove is a plurality of, and is a plurality of the oil groove interval set up in on the second contact surface.

As a preferable technical scheme of the rotor thrust supporting structure, the outer edge of the first contact surface is provided with a fillet or a chamfer; and/or

The outer edge of the second contact surface is provided with a fillet or a chamfer.

As a preferred technical scheme of a rotor thrust supporting structure, the transition surface is a convex cambered surface.

As a preferred technical scheme of the rotor thrust supporting structure, the transition surface is a plane.

As a preferable technical scheme of the rotor thrust supporting structure, the roughness of the first contact surface is less than or equal to Ra0.8.

As a preferable technical scheme of the rotor thrust supporting structure, the roughness of the second contact surface is less than or equal to Ra0.8.

As a preferable technical solution of the rotor thrust support structure, a first boss is provided at an end of the first rotor in the axial direction, and an end face of the first boss is the first contact surface.

As a preferable technical solution of the rotor thrust support structure, a second boss is provided at an end of the second rotor in the axial direction, and an end face of the second boss is the second contact surface.

The preferable technical scheme of the rotor thrust supporting structure further comprises an oil spraying device, and the oil spraying device is used for spraying lubricating oil to the joint of the first contact surface and the second contact surface.

The utility model has the advantages that:

the utility model provides a rotor thrust bearing structure, during the equipment, the first contact surface butt of first rotor in the second contact surface of second rotor, be provided with the oil groove that runs through on the second contact surface, lubricating oil can get into in the oil groove through the both ends of oil groove, when first rotor and second rotor rotate around the axis, lubricating oil in the oil groove removes to between first contact surface and the second contact surface through the transition surface, form the dynamic pressure oil film face, on the one hand, thrust between first rotor and the second rotor is resisted to the dynamic pressure oil film face, on the other hand, the dynamic pressure oil film face has reduced the frictional force between first rotor and the second rotor, prevent that the contact site temperature of first rotor and second rotor from rising, cause the operational failure. The utility model discloses cancel antifriction bearing or slide bearing among the prior art, reduced the equipment cost and the manufacturing cost that first rotor and second rotor are connected, improved the reliability when first rotor and second rotor move.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art two rotor connection;

fig. 2 is a schematic structural diagram of a rotor thrust support structure according to an embodiment of the present invention;

fig. 3 is a top view of a second rotor according to an embodiment of the present invention;

fig. 4 is an exploded view of a rotor thrust support structure according to an embodiment of the present invention;

fig. 5 is an enlarged view of fig. 4 at a.

The figures are labeled as follows:

10. a rotor; 20. a bearing;

1. a first rotor; 11. a first contact surface; 12. a first boss;

2. a second rotor; 21. a second contact surface; 22. a second boss; 23. an oil sump; 24. a transition surface.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 2 to 5, the present embodiment provides a rotor thrust support structure, which includes a first rotor 1 and a second rotor 2, wherein an end of the first rotor 1 in the axial direction is provided with a first contact surface 11, and the first contact surface 11 is a plane; a second contact surface 21 is arranged at the end part of the second rotor 2 along the axial direction, the second contact surface 21 is abutted against the first contact surface 11, a through oil groove 23 is arranged on the second contact surface 21, and the bottom of the oil groove 23 is connected with the second contact surface 21 through a transition surface 24; the lubricating oil in the oil groove 23 can move between the first contact surface 11 and the second contact surface 21 via the transition surface 24.

When the first rotor 1 and the second rotor 2 rotate around the axis, the lubricating oil in the oil groove 23 moves to a position between the first contact surface 11 and the second contact surface 21 through the transition surface 24 to form a dynamic pressure oil film surface, on one hand, the dynamic pressure oil film surface resists the thrust between the first rotor 1 and the second rotor 2, and on the other hand, the dynamic pressure oil film surface reduces the friction force between the first rotor 1 and the second rotor 2, so that the temperature between the first rotor 1 and the second rotor 2 is prevented from rising, and the operation failure is caused. The embodiment eliminates a rolling bearing or a sliding bearing in the prior art, reduces the assembly cost and the production cost of the connection of the first rotor 1 and the second rotor 2, and improves the reliability of the first rotor 1 and the second rotor 2 in operation. The first rotor 1 and the second rotor 2 rotate independently of each other, and may be rotated in the same or different directions and at the same or different speeds.

Preferably, as shown in fig. 3 and 5, the oil grooves 23 are multiple, the multiple oil grooves 23 are arranged on the second contact surface 21 at intervals, and when the first rotor 1 and the second rotor 2 rotate relatively, the lubricating oil in the multiple oil grooves 23 simultaneously moves to a position between the first contact surface 11 and the second contact surface 21, so that the forming speed of the movable pressure oil film surface is increased, and the operation reliability of the product is improved.

In this embodiment, as shown in fig. 5, the transition surface 24 is a convex arc surface to form a wedge-shaped structure, which facilitates the lubricant in the oil groove 23 to move between the first contact surface 11 and the second contact surface 21 through the arc surface. In other embodiments, the transition surface 24 may also be planar.

Further preferably, the outer edge of the first contact surface 11 is provided with a rounding or chamfer; and/or the outer edge of the second contact surface 21 is provided with a rounding or chamfer. Through the fillet and the chamfer structure, a wedge-shaped structure is formed, lubricating oil outside the first rotor 1 and the second rotor 2 can move to a position between the first contact surface 11 and the second contact surface 21 through the outer edge of the first contact surface 11 and/or the outer edge of the second contact surface 21, the forming speed of the movable oil pressing film surface is increased, and the operation reliability of a product is improved.

In this embodiment, the rotor thrust support structure further comprises a fuel injection device for injecting a lubricant to the connection between the first contact surface 11 and the second contact surface 21. The oil spray device can spray the lubricating oil into the oil groove 23 before the first rotor 1 and the second rotor 2 rotate, and the lubricating oil sprayed by the oil spray device can move between the first contact surface 11 and the second contact surface 21 through the outer edge of the first contact surface 11 and/or the outer edge of the second contact surface 21 when the first rotor 1 and the second rotor 2 rotate. It should be noted that the oil injection device is a common technique in the prior art, and the structure and principle thereof are not described herein again.

In the present embodiment, the roughness of the first contact surface 11 is less than or equal to ra0.8. The roughness of the second contact surface 21 is less than or equal to ra0.8. The first contact surface 11 and the second contact surface 21 are smooth, so that the friction force between the first contact surface 11 and the second contact surface 21 is reduced, and the generation of a movable pressure oil film surface is facilitated.

Because the machining precision of the first contact surface 11 and the second contact surface 21 is high, as shown in fig. 2 and 4, the first boss 12 is arranged at the end part of the first rotor 1 in the axial direction, the end surface of the first boss 12 is the first contact surface 11, and by arranging the first boss 12, the machining area of the first contact surface 11 is reduced, and further the machining cost of the first rotor 1 is reduced. Second rotor 2 is provided with second boss 22 along axial tip, and the terminal surface of second boss 22 is second contact surface 21, through setting up second boss 22, has reduced the processing area of second contact surface 21, and then has reduced second rotor 2's processing cost.

It should be noted that the pitch of the oil grooves 23, the width of the oil grooves 23, the size of the transition surface 24, the depth of the oil grooves 23, the width of the bottom of the oil grooves 23, the size of the outer diameter of the first boss 12, the size of the outer diameter of the second boss 22, and the size of the wedge structures at the outer edges of the first contact surface 11 and the second contact surface 21 can be adjusted and designed adaptively according to the relative rotation speed and axial force of the first rotor 1 and the second rotor 2. The hardness treatment of the first contact surface 11 and the second contact surface 21 also determines the hardening mode according to the actual relative speed and axial force of the first rotor 1 and the second rotor 2.

The rotor thrust supporting structure simplifies the connection structure of the first rotor 1 and the second rotor 2, reduces the number of parts, improves the reliability and safety of operation, and reduces the production cost.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A rotor thrust support structure, comprising:

the rotor comprises a first rotor (1), wherein a first contact surface (11) is arranged at the end part of the first rotor (1) along the axial direction, and the first contact surface (11) is a plane;

the rotor comprises a second rotor (2), wherein a second contact surface (21) is arranged at the end part of the second rotor (2) along the axial direction, the second contact surface (21) is abutted against the first contact surface (11), a through oil groove (23) is arranged on the second contact surface (21), and the bottom of the oil groove (23) is connected with the second contact surface (21) through a transition surface (24); the lubricating oil in the oil groove (23) can move between the first contact surface (11) and the second contact surface (21) via the transition surface (24).

2. The rotor thrust support structure according to claim 1, wherein the oil groove (23) is plural, and the plural oil grooves (23) are provided at intervals on the second contact surface (21).

3. Rotor thrust support structure according to claim 1, characterized in that the outer edge of said first contact surface (11) is provided with a rounding or chamfer; and/or

The outer edge of the second contact surface (21) is provided with a rounding or chamfer.

4. The rotor thrust support structure of claim 1, wherein said transition surface (24) is a convex arcuate surface.

5. The rotor thrust support structure of claim 1, wherein said transition surface (24) is planar.

6. Rotor thrust support structure according to claim 1, characterized in that said first contact surface (11) has a roughness less than or equal to ra0.8.

7. Rotor thrust support structure according to claim 1, characterized in that the roughness of said second contact surface (21) is less than or equal to ra0.8.

8. Rotor thrust support structure according to any one of claims 1 to 7, characterized in that an end of said first rotor (1) in an axial direction is provided with a first boss (12), an end face of said first boss (12) being said first contact face (11).

9. Rotor thrust support structure according to any one of claims 1 to 7, characterized in that the end of the second rotor (2) in the axial direction is provided with a second boss (22), the end face of the second boss (22) being the second contact face (21).

10. Rotor thrust support according to any one of claims 1 to 7, characterized in that it further comprises oil spraying means for spraying lubricating oil to the junction of said first contact surface (11) and said second contact surface (21).