CN216951267U

CN216951267U - Thrust foil gas bearing

Info

Publication number: CN216951267U
Application number: CN202220884843.2U
Authority: CN
Inventors: 常海兵; 甘露; 唐茂; 李响; 段威林; 汪样兴; 安彩云; 高尉
Original assignee: Cssc Southwest Equipment Research Institute Co ltd
Current assignee: Cssc Southwest Equipment Research Institute Co ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-07-12
Anticipated expiration: 2032-04-18

Abstract

The utility model discloses a thrust foil gas bearing, which comprises a bearing seat, a foil, a fixing pin and a mounting bolt, wherein the bearing seat is provided with a plurality of bearing holes; the foils comprise a bottom foil and a top foil; a foil groove is formed at the joint of the bottom foil and the top foil; the bearing frame is provided with the draw-in groove that is used for with foil groove joint along circumference, the fixed pin is located the top in foil groove and the one end of fixed pin and the inner joint of draw-in groove, the outer end of draw-in groove is provided with the mounting hole with construction bolt threaded connection, one side of construction bolt just sets up and is used for compressing tightly the outer end of fixed pin to the outer end of fixed pin. The thrust foil gas bearing is strong in forming consistency, high in foil top layer foil height consistency, simple in assembly process and free of welding operation, and the problem that a bearing seat deforms due to welding cannot occur. The whole assembly process is simplified, and the mounting structure strength and the use performance of the thrust gas bearing are ensured on the premise of improving the assembly efficiency and the yield.

Description

Thrust foil gas bearing

Technical Field

The utility model relates to the technical field of foil dynamical pressure gas bearings, in particular to a thrust foil gas bearing.

Background

The thrust foil gas bearing is composed of a top foil, a bottom foil and a bottom plate, wherein the bottom plate mainly plays a role in fixing and supporting the foils and facilitating installation on equipment, the bottom foil mainly plays a role in providing rigidity and damping for the gas bearing, and the top foil plays a role in generating working gas film pressure, so that effective support is achieved.

The top foil and the bottom foil of the existing thrust foil gas bearing are of a single-piece structure, and the assembling process of the bearing is to weld a plurality of pieces of bottom foil and a plurality of pieces of top foil to a bottom plate in sequence. The assembly process is complex, the bottom plate is deformed due to repeated welding, the consistency of the welding of a plurality of foils is poor, and the yield, the installation structure strength and the service performance of the thrust gas bearing are seriously influenced.

Disclosure of Invention

Aiming at the defects of the prior art, the technical problem to be solved by the application of the patent is how to provide the thrust foil gas bearing with good forming consistency, high mounting structure strength and good use performance.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a thrust foil gas bearing comprises a bearing seat, foils, fixing pins and mounting bolts, wherein the foils, the fixing pins and the mounting bolts are the same in number;

the foil comprises a bottom foil and a top foil, a plurality of arch structures are arranged on the bottom foil along the circumferential direction, the top foil comprises a wedge-shaped structure section and a straight structure section, and the wedge-shaped structure section is arranged close to the bottom foil; a foil groove is formed in the joint of the bottom foil and the top foil, and the bottom foil, the foil groove and the top foil are of an integrated structure;

the bearing frame is provided with the draw-in groove that is used for with foil groove joint along circumference, the fixed pin is located the top in foil groove and the one end of fixed pin and the inner joint of draw-in groove, the outer end of draw-in groove is provided with the mounting hole with construction bolt threaded connection, one side of construction bolt just sets up and is used for compressing tightly the outer end of fixed pin to the outer end of fixed pin.

The inner end surface of the clamping groove is concave to form a fixing pin clamping groove, and the inner end of the fixing pin is inserted into the fixing pin clamping groove.

The bearing seat is of a circular flat plate structure.

Wherein the foil is provided with four or more pieces.

In conclusion, the thrust foil gas bearing is high in forming consistency, high in consistency of the top foil of the foil, simple in assembly process, free of welding operation and free of welding deformation. In addition, the integral structure of the top foil and the bottom foil simplifies the whole assembly process, and ensures the mounting structure strength and the service performance of the thrust gas bearing on the premise of improving the assembly efficiency and the yield.

Drawings

Fig. 1 is a schematic structural diagram of a thrust foil gas bearing according to the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a schematic view of the foil of fig. 1.

Fig. 4 is an enlarged schematic view of the junction of the bearing housing, foil, mounting bolt and fixing pin of fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "upper, lower" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

As shown in fig. 1 to 4, a thrust foil gas bearing comprises a bearing seat 1, a foil 2, a fixing pin 3 and a mounting bolt 4, wherein the number of the foil 2, the fixing pin 3 and the mounting bolt 4 is the same;

the foils comprise a bottom foil 21 and a top foil 22, the bottom foil is circumferentially provided with a plurality of arch structures, the top foil comprises a wedge-shaped structure section 221 and a straight structure section 222, and the wedge-shaped structure section is arranged close to the bottom foil; a foil groove 23 is formed in the joint of the bottom foil and the top foil, and the bottom foil, the foil groove and the top foil are of an integrated structure; when the foils are installed, the top foil and the bottom foil are installed integrally, and the technological process of assembling the foils is simplified;

the bearing seat 1 is circumferentially provided with a clamping groove 11 used for being clamped with the foil groove 23, and the foil groove of the foil is correspondingly clamped into the clamping groove of the bearing seat, so that the top foil and the bottom foil can be integrally and accurately positioned; the fixed pin is located the top in foil groove and the one end of fixed pin and the inner joint of draw-in groove, the outer end of draw-in groove is provided with mounting hole 12 with construction bolt threaded connection, one side of construction bolt just sets up and is used for compressing tightly the outer end of fixed pin to the outer end of fixed pin.

In this embodiment, the inner end surface of the slot is recessed to form a fixing pin slot 13, and the inner end of the fixing pin is inserted into the fixing pin slot. The fixed pin clamping groove can lock one end of the fixed pin, and the mounting bolt at the mounting hole can lock the other end of the fixed pin, so that the foil is fixed on the bearing seat.

In this embodiment, the bearing seat is a circular flat plate structure.

In this embodiment, the foil is provided with four or more pieces.

In the whole assembly process, the foil is mounted on the bearing seat without welding, the foil can be fixed on the bearing seat through the fixing pin, and the two ends of the locking fixing pin can achieve tensile strength stronger than that of welding, so that the situation that the foil of the thrust gas bearing is broken and offset does not occur in the working process is fully guaranteed. The mounting bolts arranged on the mounting holes can also realize that the whole thrust gas bearing is fixed on used equipment.

The assembling process comprises the following steps:

the bearing seat is arranged on the plane, and the clamping groove faces upwards. The accurate positioning of the foil can be realized by fitting the foil groove of the foil into the clamping groove of the bearing seat. Then foil is fixed, the fixing pin is attached to the foil groove of the foil, one end, facing the circle center of the bearing seat, of the fixing pin extends into the fixing pin clamping groove on one side, facing the circle center, of the clamping groove of the bearing seat, the other end of the fixing pin is fixed through the mounting bolt, the two ends of the fixing pin are fixed, the foil is compressed, and the foil is fixed on the bearing seat. And the rest foils are installed and fixed according to the same steps, the top foil of the adjacent foil just covers the bottom foil of the previous foil, and the installation and the fixation of the plurality of foils are completed, so that the integral assembly of the thrust gas bearing is realized.

The thrust gas bearing assembled by the method is high in forming consistency, high in consistency of the top foil of the foil, simple in assembly process, free of welding operation and free of the problem of deformation of the bearing seat caused by welding. In addition, the integral structure of the top foil and the bottom foil simplifies the whole assembly process, and ensures the mounting structure strength and the service performance of the thrust gas bearing on the premise of improving the assembly efficiency and the yield.

Finally, it should be noted that: various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. The thrust foil gas bearing is characterized by comprising a bearing seat (1), a foil (2), a fixing pin (3) and mounting bolts (4), wherein the number of the foil, the number of the fixing pin and the number of the mounting bolts are the same;

the foils comprise a bottom foil (21) and a top foil (22), the bottom foil is circumferentially provided with a plurality of arch structures, the top foil comprises wedge-shaped structure sections (221) and straight structure sections (222), and the wedge-shaped structure sections are arranged close to the bottom foil; a foil groove (23) is formed in the joint of the bottom foil and the top foil, and the bottom foil, the foil groove and the top foil are of an integrated structure;

the bearing frame is provided with draw-in groove (11) that are used for with foil groove joint along circumference, the fixed pin is located the top in foil groove and the one end of fixed pin and the inner joint of draw-in groove, the outer end of draw-in groove is provided with mounting hole (12) with construction bolt threaded connection, one side of construction bolt just sets up and is used for compressing tightly the outer end of fixed pin to the outer end of fixed pin.

2. Thrust foil gas bearing according to claim 1, wherein the inner end surfaces of the clamping grooves are recessed to form fixing pin clamping grooves (13), the inner ends of the fixing pins being inserted into the fixing pin clamping grooves.

3. A thrust foil gas bearing in accordance with claim 2 wherein said bearing seats are of circular flat plate construction.

4. A thrust foil gas bearing in accordance with claim 1 wherein said foil is provided in four or more pieces.