CN201269108Y - Circular ring air cavity type gas bearing low-temperature booster turbine expansion turbine - Google Patents
Circular ring air cavity type gas bearing low-temperature booster turbine expansion turbine Download PDFInfo
- Publication number
- CN201269108Y CN201269108Y CNU2008201540613U CN200820154061U CN201269108Y CN 201269108 Y CN201269108 Y CN 201269108Y CN U2008201540613 U CNU2008201540613 U CN U2008201540613U CN 200820154061 U CN200820154061 U CN 200820154061U CN 201269108 Y CN201269108 Y CN 201269108Y
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- CN
- China
- Prior art keywords
- bearing
- circular ring
- bearing surface
- breeder tubes
- air cavity
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- Expired - Lifetime
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Abstract
The utility model relates to a low temperature pressure increase turbo-expander of a circular ring gas chamber type gas bearing, comprising a left bearing and a right bearing which are arranged between the two ends of a main shaft and an inner cylinder body and are all gas bearings; the thrust bearing surface and the radial bearing surface of the left bearing and the right bearing are respectively provided with at least one ring-shaped shallow slot which leads a plurality of air bleeders on the same circular ring line to be communicated with each other, thus forming a circular ring gas chamber. The circular ring gas chamber changes point source ventilation into line source ventilation, thus leading the pressure of a gas outlet to be evenly distributed and having the surface throttle effect. The carrying capacity of the low temperature pressure increase turbo-expander of the circular ring gas chamber type gas bearing is improved than that of a circular ring gas chamber type bearing pressure increase turbo-expander by two times; the maximum swelling amount reaches 3300m<3>/h; and the turbo-expander can be used for an air separator with the swelling amount of 3200 to 4500m<3>/h in an assorted mode and reduce the manufacturing cost by 50 percent compared with an oil bearing turbo-expander.
Description
Technical field
The utility model relates to a kind of turbo-expander, particularly a kind of circular ring air cavity type gas bearing low-temperature turbine boosting expansion machine.
Background technique
Gas bearing has that frictional force is little, wasted work is little, air consumption is little, pollution-free, noise is low, advantage such as simple in structure and easy to operate, is widely used in high-revolving booster expansion turbine.The high-revolving low-temperature turbine boosting expansion machine of small flow generally all adopts radially air feed circular hole air cavity type bearing (also claiming floated bearing) at present.But because gas enters atmosphere from the bearing outward edge continuously, so gas does not have the boundary lubrication ability.In running up, if in a single day the load of gas bearing has surpassed the speed limit of regulation, the direct contact of solid can take place at once and locking causes bearing and main shaft impaired.
The model utility content
The purpose of this utility model in order to solve the problems referred to above that prior art exists, provides a kind of circular ring air cavity type gas bearing low-temperature turbine boosting expansion machine exactly.
The technical solution of the utility model is: a kind of circular ring air cavity type gas bearing low-temperature turbine boosting expansion machine, comprise the low-temperature end spiral case, the temperature end spiral case, the intermediate that connects low-temperature end spiral case and temperature end spiral case, intermediate comprises outer cylinder body and inner barrel, configuration main shaft in the inner barrel, between main shaft two ends and inner barrel, be respectively equipped with left bearing and right bearing, left bearing and right bearing all are gas bearing, this gas bearing comprises bearing support and the lining bearing bush in bearing support, on bearing support, be provided with a plurality of breeder tubes of a plurality of tangential vents and this tangential vent of connection and thrust shaft bearing surface, on bearing bush, be provided with a plurality of breeder tubes of a plurality of tangential vents and this tangential vent of connection and radial bearing surface; Be characterized in, be respectively equipped with at least one ring shallow slot on the thrust shaft bearing surface of described left bearing and right bearing and the radial bearing surface, this ring shallow slot will be in a plurality of breeder tubes on same loop line formation circular ring air cavity that is interconnected.
Be respectively equipped with 32 breeder tubes on the radial bearing surface of described left bearing and the thrust shaft bearing surface, 32 breeder tubes on the radial bearing surface are distributed on 4 loop lines, and 32 breeder tubes on the thrust shaft bearing surface are distributed on 2 loop lines; Be provided with 4 ring shallow slots on the radial bearing surface of left bearing, 4 ring shallow slots will be in a plurality of breeder tubes on the same loop line respectively and be interconnected and form 4 circular ring air cavities; Be provided with 2 ring shallow slots on the thrust shaft bearing surface of left bearing, 2 ring shallow slots will be in a plurality of breeder tubes on the same loop line respectively and be interconnected and form 2 circular ring air cavities.
The radial bearing surface of described right bearing is provided with 32 breeder tubes, and 32 breeder tubes are distributed on 4 loop lines; The thrust shaft bearing surface of right bearing is provided with 16 breeder tubes, and 16 breeder tubes are distributed on 1 loop line; Be provided with 4 ring shallow slots on the radial bearing surface of right bearing, 4 ring shallow slots will be in a plurality of breeder tubes on the same loop line respectively and be interconnected and form 4 circular ring air cavities; Be provided with 1 ring shallow slot on the thrust shaft bearing surface of right bearing, this ring shallow slot will be in a plurality of breeder tubes on the same loop line and be interconnected and form 1 circular ring air cavity.
The degree of depth of described ring shallow slot is 0.12-0.15mm, and width is 2-2.5mm.
Gas bearing in the utility model makes the ventilation of point source ventilation becoming line source, thereby gas outlet pressure is evenly distributed, and have the surface throttle effect owing to be provided with the ring shallow slot on thrust shaft bearing surface and radial bearing surface.Gas bearing in the utility model is applied on the low-temperature turbine boosting expansion machine, can improves the bearing capacity and the support stiffness of low-temperature turbine boosting expansion machine greatly, realize big flow and high rotating speed.The bearing capacity of circular ring air cavity type gas bearing low-temperature turbine boosting expansion machine of the present utility model is higher 2 times than the bearing capacity of circular hole air cavity type bearing booster expansion turbine, and the maximum swelling amount has reached 3300m
3/ h can supportingly be used for 3200～4500m
3/ h air separation equipment, the manufacture cost of turbo-expander reduces by 50% than oil bearing turbo-expander.
Description of drawings
Fig. 1 is the sectional structure schematic representation of the utility model circular ring air cavity type gas bearing low-temperature turbine boosting expansion machine;
Fig. 2 is the broken section structural representation of the gas bearing in the utility model;
Fig. 3 is the I portion enlarged view of Fig. 2.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Referring to Fig. 1, the utility model circular ring air cavity type gas bearing low-temperature turbine boosting expansion machine comprises low-temperature end spiral case 1, temperature end spiral case 2, connects the intermediate of low-temperature end spiral case and temperature end spiral case, intermediate comprises outer cylinder body 3 and inner barrel 4, configuration main shaft 5 in the inner barrel 4, be respectively equipped with left bearing 6 and right bearing 7 between main shaft 5 two ends and inner barrel 4, the main shaft two ends connect decompressor impeller 8 and the interior supercharging impeller 9 of temperature end spiral case in the low-temperature end spiral case respectively.
Left bearing 6 in the utility model and right bearing 7 all are gas bearing, and the structure of this gas bearing is basic identical.With left bearing 6 is example, its structure such as Fig. 2, shown in Figure 3.It comprises bearing support 61 and the lining bearing bush 62 in bearing support, on bearing support 61, be provided with a plurality of breeder tubes 612 of a plurality of tangential vents 611 and this tangential vent of connection and thrust shaft bearing surface, be provided with at least one ring shallow slot 613 on the thrust shaft bearing surface, this ring shallow slot 613 will be in a plurality of breeder tubes 612 on same loop line formation circular ring air cavity that is interconnected.On bearing bush 62, be provided with a plurality of breeder tubes 622 of a plurality of tangential vents 621 and this tangential vent of connection and radial bearing surface, be provided with at least one ring shallow slot 623 on radial bearing surface, this ring shallow slot 623 will be in a plurality of breeder tubes 622 on same loop line formation circular ring air cavity that is interconnected.The degree of depth that is arranged on each the ring shallow slot on thrust shaft bearing surface and the radial bearing surface is 0.12-0.15mm, and width is 2-2.5mm.
Be respectively equipped with 32 breeder tubes on the radial bearing surface of the left bearing in the utility model and the thrust shaft bearing surface, 32 breeder tubes on the radial bearing surface are distributed on 4 loop lines, and 32 breeder tubes on the thrust shaft bearing surface are distributed on 2 loop lines; Be provided with 4 ring shallow slots on the radial bearing surface of left bearing, 4 ring shallow slots will be in a plurality of breeder tubes on the same loop line respectively and be interconnected and form 4 circular ring air cavities; Be provided with 2 ring shallow slots on the thrust shaft bearing surface of left bearing, 2 ring shallow slots will be in a plurality of breeder tubes on the same loop line respectively and be interconnected and form 2 circular ring air cavities.Pressure be the dry pure air series of 0.5Mpa (gauge pressure) from a throttling of 64 apertures, behind 6 circular ring air cavity second throttles, enter atmosphere respectively again.
The radial bearing surface of the right bearing in the utility model is provided with 32 breeder tubes, and 32 breeder tubes are distributed on 4 loop lines; The thrust shaft bearing surface of right bearing is provided with 16 breeder tubes, and 16 breeder tubes are distributed on 1 loop line; Be provided with 4 ring shallow slots on the radial bearing surface of right bearing, 4 ring shallow slots will be in a plurality of breeder tubes on the same loop line respectively and be interconnected and form 4 circular ring air cavities; Be provided with 1 ring shallow slot on the thrust shaft bearing surface of right bearing, this ring shallow slot will be in a plurality of breeder tubes on the same loop line and be interconnected and form 1 circular ring air cavity.
Claims (4)
1. circular ring air cavity type gas bearing low-temperature turbine boosting expansion machine, comprise the low-temperature end spiral case, the temperature end spiral case, the intermediate that connects low-temperature end spiral case and temperature end spiral case, intermediate comprises outer cylinder body and inner barrel, configuration main shaft in the inner barrel, between main shaft two ends and inner barrel, be respectively equipped with left bearing and right bearing, left bearing and right bearing all are gas bearing, this gas bearing comprises bearing support and the lining bearing bush in bearing support, on bearing support, be provided with a plurality of breeder tubes of a plurality of tangential vents and this tangential vent of connection and thrust shaft bearing surface, on bearing bush, be provided with a plurality of breeder tubes of a plurality of tangential vents and this tangential vent of connection and radial bearing surface; It is characterized in that: be respectively equipped with at least one ring shallow slot on the thrust shaft bearing surface of described left bearing and right bearing and the radial bearing surface, this ring shallow slot will be in a plurality of breeder tubes on same loop line formation circular ring air cavity that is interconnected.
2. circular ring air cavity type gas bearing low-temperature turbine boosting expansion machine as claimed in claim 1, it is characterized in that: be respectively equipped with 32 breeder tubes on the radial bearing surface of described left bearing and the thrust shaft bearing surface, 32 breeder tubes on the radial bearing surface are distributed on 4 loop lines, and 32 breeder tubes on the thrust shaft bearing surface are distributed on 2 loop lines; Be provided with 4 ring shallow slots on the radial bearing surface of left bearing, 4 ring shallow slots will be in a plurality of breeder tubes on the same loop line respectively and be interconnected and form 4 circular ring air cavities; Be provided with 2 ring shallow slots on the thrust shaft bearing surface of left bearing, 2 ring shallow slots will be in a plurality of breeder tubes on the same loop line respectively and be interconnected and form 2 circular ring air cavities.
3. circular ring air cavity type gas bearing low-temperature turbine boosting expansion machine as claimed in claim 1 is characterized in that: the radial bearing surface of described right bearing is provided with 32 breeder tubes, and 32 breeder tubes are distributed on 4 loop lines; The thrust shaft bearing surface of right bearing is provided with 16 breeder tubes, and 16 breeder tubes are distributed on 1 loop line; Be provided with 4 ring shallow slots on the radial bearing surface of right bearing, 4 ring shallow slots will be in a plurality of breeder tubes on the same loop line respectively and be interconnected and form 4 circular ring air cavities; Be provided with 1 ring shallow slot on the thrust shaft bearing surface of right bearing, this ring shallow slot will be in a plurality of breeder tubes on the same loop line and be interconnected and form 1 circular ring air cavity.
4. as claim 1 or 2 or 3 described circular ring air cavity type gas bearing low-temperature turbine boosting expansion machines, it is characterized in that: the degree of depth of described ring shallow slot is 0.12-0.15mm, and width is 2-2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201540613U CN201269108Y (en) | 2008-10-15 | 2008-10-15 | Circular ring air cavity type gas bearing low-temperature booster turbine expansion turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201540613U CN201269108Y (en) | 2008-10-15 | 2008-10-15 | Circular ring air cavity type gas bearing low-temperature booster turbine expansion turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201269108Y true CN201269108Y (en) | 2009-07-08 |
Family
ID=40841708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201540613U Expired - Lifetime CN201269108Y (en) | 2008-10-15 | 2008-10-15 | Circular ring air cavity type gas bearing low-temperature booster turbine expansion turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201269108Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554969A (en) * | 2020-12-11 | 2021-03-26 | 中国北方发动机研究所(天津) | Bearing pedestal structure and variable-stiffness bearing system of turbocharger |
-
2008
- 2008-10-15 CN CNU2008201540613U patent/CN201269108Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554969A (en) * | 2020-12-11 | 2021-03-26 | 中国北方发动机研究所(天津) | Bearing pedestal structure and variable-stiffness bearing system of turbocharger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20081015 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |