CN201391550Y

CN201391550Y - Gas bearing

Info

Publication number: CN201391550Y
Application number: CN200920070949U
Authority: CN
Inventors: 胡正平; 俞建
Original assignee: SHANGHAI QIYUAN AIR SEPARATION TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: Shanghai Qiyuan Air Separation Technology Development Co., Ltd.
Priority date: 2009-04-22
Filing date: 2009-04-22
Publication date: 2010-01-27
Anticipated expiration: 2019-04-22

Abstract

The utility model relates to a gas bearing which comprises a bearing body and a bush, wherein the thrust bearing surface of the bearing body is provided with a plurality of air holes which are arranged as inner ring air holes and outer ring air holes; and the adjacent air holes of the inner ring and the outer ring are connected through shallow slots. Compared with the prior art, the gas bearing has the advantages of being capable of improving the bearing capability and supporting rigidity of the bearing of a pressurizing turbine expansion engine, realizing the larger flow rate and high rotating speed of the pressurizing expansion engine, and the like.

Description

A kind of gas bearing

Technical field

The utility model relates to a kind of bearing, especially relates to a kind of directional radiation groove thrust gas bearing.

Background technique

Gas bearing has that frictional force is little, wasted work is little, air consumption is little, pollution-free, advantage such as noise is low, simple in structure and operating aspect, is widely used in high-revolving turbo-expander.The high-revolving turbo-expander of small flow generally all adopts single breeder tube thrust gas bearing at present.But, do not have the boundary lubrication ability because gas enters atmosphere from the bearing outward edge continuously.In running up, stuck if the direct contact of solid in case surpass regulation, can take place at once for the load of gas bearing, cause the damage of bearing and main shaft.So gas bearing generally can only be used for the turbo-expander of small flow at present.

Summary of the invention

The purpose of this utility model is exactly to provide a kind of bearing capacity and support stiffness that improves the booster expansion turbine bearing for the defective that overcomes above-mentioned prior art existence, realizes big flow of booster expansion turbine and high-revolving gas bearing.

The purpose of this utility model can be achieved through the following technical solutions: a kind of gas bearing, this bearing comprises bearing support and lining, it is characterized in that, the thrust shaft bearing surface of described bearing support is provided with a plurality of breeder tubes, these a plurality of breeder tubes are arranged in inner ring breeder tube and outer ring breeder tube, and the adjacent breeder tube of inside and outside two circles connects by shallow slot.

Described shallow slot is the directed radiation shallow slot, and its degree of depth is that 0.05-0.2mm, width are 0.5-1.0mm.

The degree of depth of described shallow slot is that 0.1mm, width are 0.8mm.

Described inner ring breeder tube and outer ring breeder tube respectively comprise 8-32 aperture, and described shallow slot is provided with the 8-32 bar.

Preferred 16 of described inner ring breeder tube and outer ring breeder tube, preferred 16 of described shallow slot.

Compared with prior art, the utility model hydrostatic gas-lubricated bearing is owing to be provided with many directed radiation shallow slots and two row's breeder tubes on thrust surface, the breeder tube of arranging and effluxing in this shallow slot connects, make the point source air feed become the line source air feed, thereby make the gas outlet pressure distribution uniform, and has a surface throttle effect, breeder tube gas bearing bearing capacity than prior art improves twice, hydrostatic directional radiation groove gas bearing of the present utility model is applied on the booster expansion turbine, the bearing capacity and the support stiffness of booster expansion turbine bearing be can improve, big flow of booster expansion turbine and high rotating speed realized.

Description of drawings

Fig. 1 partly cuts open plan view for the utility model gas bearing;

Fig. 2 is the right elevation of Fig. 1;

Fig. 3 is the I portion enlarged view of Fig. 1.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

Embodiment 1

Shown in Fig. 1～3, a kind of gas bearing, this bearing comprises bearing support and lining, the thrust shaft bearing surface 1 of described bearing support is provided with 32 breeder tubes 2, article 16, directed radiation shallow slot 3,32 breeder tubes are arranged in two circles: 16 of 16 of inner ring breeder tubes and outer ring breeder tubes, the breeder tube that inside and outside two circles are adjacent connects by directed radiation shallow slot 3, the degree of depth of this directed radiation shallow slot 3 is 0.1mm, width is 0.8mm, make the point source air feed become the line source air feed, thereby make the gas outlet pressure distribution uniform, and has a surface throttle effect, hydrostatic directional radiation groove gas bearing of the present utility model is applied on the booster expansion turbine, the bearing capacity and the support stiffness of booster expansion turbine bearing be can improve, big flow of booster expansion turbine and high rotating speed realized.

Embodiment 2

Referring to Fig. 1～3, a kind of gas bearing, this bearing comprises bearing support and lining, the thrust shaft bearing surface of described bearing support is provided with 16 breeder tubes, 8 directed radiation shallow slots, 16 breeder tubes are arranged in two circles: 8 of 8 of inner ring breeder tubes and outer ring breeder tubes, the adjacent breeder tube of inside and outside two circles connects by the directed radiation shallow slot, and the degree of depth of this directed radiation shallow slot is that 0.2mm, width are 1.0mm.

Embodiment 3

Referring to Fig. 1～3, a kind of gas bearing, this bearing comprises bearing support and lining, the thrust shaft bearing surface of described bearing support is provided with 64 breeder tubes, 32 directed radiation shallow slots, 64 breeder tubes are arranged in two circles: 32 of 32 of inner ring breeder tubes and outer ring breeder tubes, the adjacent breeder tube of inside and outside two circles connects by the directed radiation shallow slot, and the degree of depth of this directed radiation shallow slot is that 0.05mm, width are 0.5mm.

Claims

1. gas bearing, this bearing comprises bearing support and lining, it is characterized in that, the thrust shaft bearing surface of described bearing support is provided with a plurality of breeder tubes, these a plurality of breeder tubes are arranged in inner ring breeder tube and outer ring breeder tube, and the adjacent breeder tube of inside and outside two circles connects by shallow slot.

2. a kind of gas bearing according to claim 1 is characterized in that, described shallow slot is the directed radiation shallow slot, and its degree of depth is that 0.05-0.2mm, width are 0.5-1.0mm.

3. a kind of gas bearing according to claim 2 is characterized in that, the degree of depth of described shallow slot is that 0.1mm, width are 0.8mm.

4. a kind of gas bearing according to claim 1 is characterized in that, described inner ring breeder tube and outer ring breeder tube respectively comprise 8-32 aperture, and described shallow slot is provided with the 8-32 bar.

5. a kind of gas bearing according to claim 4 is characterized in that, described inner ring breeder tube and outer ring breeder tube are provided with 16, and described shallow slot is provided with 16.