CN202100282U - Rear supercharging turboexpander of gas bearing - Google Patents
Rear supercharging turboexpander of gas bearing Download PDFInfo
- Publication number
- CN202100282U CN202100282U CN2010206080685U CN201020608068U CN202100282U CN 202100282 U CN202100282 U CN 202100282U CN 2010206080685 U CN2010206080685 U CN 2010206080685U CN 201020608068 U CN201020608068 U CN 201020608068U CN 202100282 U CN202100282 U CN 202100282U
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- gas bearing
- booster
- wheel
- bearing
- impeller
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- 238000005452 bending Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 9
- 210000004907 gland Anatomy 0.000 claims description 5
- 238000006757 chemical reactions by type Methods 0.000 claims description 4
- 238000005219 brazing Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 70
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000000926 separation method Methods 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000001970 hydrokinetic effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 150000002829 nitrogen Chemical class 0.000 description 1
- 239000008041 oiling agent Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model provides a rear supercharging turboexpander of a gas bearing, which comprises an intermediate housing. A left end of the intermediate housing is provided with a turbine spiral case, and a right end is provided with a supercharger spiral case. The intermediate housing is internally provided with a rotor rotatably. Two ends of the rotor are respectively provided with an expansion wheel and a supercharging wheel in the turbine spiral case and the supercharger spiral case. A left gas bearing and a right gas bearing are sleeved on the rotor. The left gas bearing is used for supporting the expansion wheel. The right gas bearing is used for supporting the supercharging wheel. A bearing spacing sleeve is provided between the left gas bearing and the right gas bearing. The bearing spacing sleeve is sleeved outside the rotor and is fixed with the intermediate housing, wherein, the expansion wheel is a radial axial-flow centripetal counteraction expansion wheel. The supercharging wheel is a front-inclination back-bending type ternary flow-closing wheel type supercharging wheel. The rear supercharging turboexpander of the gas bearing has the following beneficial effects: large amount of processed air, high efficiency and high reliability.
Description
Technical field
The utility model relates to a kind of booster expansion turbine, booster expansion turbine after especially a kind of gas bearing.
Background technique
Booster expansion turbine is that air separation equipment and rock gas petroleum gas liquefaction separation equipment and low temperature breaking equipment etc. obtain the necessary crucial portion of cold machine, is the heart that guarantees a whole set of air separation equipment stable operation.Its cardinal principle is to utilize the gas that certain pressure is arranged in turbo-expander, to carry out adiabatic expansion externally acting and the interior ability of spent gas itself, thereby gas self is cooled off consumingly and reaches the purpose of refrigeration.The energy of turbo-expander output is reclaimed or braking blower consumption by coaxial compressor.
Along with technical problems such as packaged air separation plant developed to the transition of large air separation plant, and existing turbo-expander begins to satisfy the large air separation plant demand, and it is less to have shown processing tolerance, and efficient is lower, and reliability is lower.
In view of this, the utility model provides a kind of improved gas-bearing expansion turbine.
The model utility content
To the deficiency of existing technology, the technical problem that the utility model solves provides booster expansion turbine after a kind of gas bearing of avoiding the problems referred to above, to improve the performance of gas-bearing expansion turbine.
The purpose of the utility model realizes through following technological scheme is provided:
Booster expansion turbine after a kind of gas bearing comprises a middle casing, and the left end of said middle casing is installed the turbine spiral case, right-hand member is equipped with volute of booster; Be provided with rotor in the said middle casing rotationally, in turbine spiral case and volute of booster, be provided with expansion wheel and impeller of booster respectively, on said rotor, be arranged with left gas bearing and right gas bearing at the two ends of said rotor; Said left gas bearing is used to support expansion wheel; Said right gas bearing is used to support impeller of booster, between said left gas bearing and said right gas bearing, is provided with the bearing stop collar, and described bearing stop collar is set in outside the said rotor; And fix with said middle casing; Wherein, said expansion wheel is entad reaction type of a footpath axial flow expansion wheel, and said impeller of booster is the back curved three-dimensional flow hooded impeller type impeller of booster that leans forward.
Further, the blade of entad reaction type of said footpath axial flow expansion wheel radially is uniformly distributed with at the cylindrical place, adopts the cylinder parabolic surface at the inner radius blade.
Further; The said back curved three-dimensional flow hooded impeller type impeller of booster that leans forward is taked axial admission; The type of flow of cylindrical exhaust; Blade is in the opposite direction at cylindrical place bending direction and wheel rotation, and with back ward impeller in the outlet port along the placement that turns forward again of blade height direction, place, said blade wheel top is welded with a wheel cap with the brazing filler metal mode.
Further, be provided with stuffing box gland between described left gas bearing and the said expansion wheel.
Further, be provided with collet and spacing sealing plate between said right gas bearing and the said impeller of booster.
Further, be provided with 8 axial vent holes in said left gas bearing and the right gas bearing.
The beneficial effect of the utility model is mainly reflected in: handle large-mindedly, and efficient, reliability are high.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further:
Fig. 1 is the vertical profile schematic representation of booster expansion turbine after the gas bearing of the utility model.
Fig. 2 is the plan view of the expansion wheel of booster expansion turbine after the gas bearing of the utility model.
Fig. 3 is the vertical profile schematic representation of the expansion wheel of booster expansion turbine after the gas bearing of the utility model.
Fig. 4 is the plan view of the impeller of booster of booster expansion turbine after the gas bearing of the utility model.
Fig. 5 is the vertical profile schematic representation of the impeller of booster of booster expansion turbine after the gas bearing of the utility model.
Embodiment
Following preferred forms with reference to description of drawings the utility model.
As shown in Figure 1; Booster expansion turbine comprises a middle casing 2 after the gas bearing that the utility model relates to; The left end of said middle casing 2 is installed turbine spiral case 1, right-hand member is equipped with volute of booster 3; Be provided with rotor 8 rotationally in the said middle casing 2, in turbine spiral case 1 and volute of booster 3, be provided with expansion wheel 4 and impeller of booster 12 respectively at the two ends of said rotor 8.Need to prove: on said rotor 8, be arranged with left gas bearing 6 and right gas bearing 9, said left gas bearing 6 is used to support expansion wheel 4, and said right gas bearing 9 is used for supporting impeller of booster 12.Said expansion wheel 4 is an entad reaction pattern of high efficiency footpath axial flow; Said impeller of booster is the high efficiency back curved three-dimensional flow hooded impeller pattern that leans forward.
When booster expansion turbine moves; The high pressure-temperature gas that is easy to take place the impeller of booster back of the body flows to the bearing place along main shaft, thereby makes the bearing expanded by heating, makes the section gap smaller of itself and main shaft; Seize or stuck phenomenon take place; The utility model is provided with bearing stop collar 7 between left gas bearing 6 and right gas bearing 9, described bearing stop collar 7 is set in outside the rotor 8, and fixing with middle casing 2.Such design has improved the bearing capacity of bearing, and it can force the expansion that suppresses bearing face, to guarantee the fit up gap.
Be provided with stuffing box gland 5 between described left gas bearing 6 and the expansion wheel 4, be provided with collet 10 and spacing sealing plate 11 between described right gas bearing 9 and the impeller of booster 12.Like this, make the outer leakage quantity of gas be controlled in the minimum zone, in stuffing box gland 5 and spacing sealing plate 11, can also charge into the normal temperature blanket gas and leak with the flow through cryogenic gas of decompressor of prevention.As shown in the figure, on middle casing 2, also be provided with two bearing gas input ends, be respectively left and right gas bearing air feed.
Because the oiling agent of gas bearing is an air, so do not worry the problem that whether can burn.In addition, gas bearing also has following characteristics:
1. surface friction drag is low, because gas viscosity is more much lower than liquid, at room temperature air viscosity is merely five a thousandths of No. 10 machinery oil, and the surface friction drag of bearing is directly proportional with viscosity, so the surface friction drag of gas bearing is lower than fluid lubricated bearing;
2. the operating speed scope is big, and the surface friction drag of gas bearing is low, and temperature rise is low;
3. the Applicable temperature scope is big, and gas can keep gaseous state in the temperature range greatly, and its viscosity temperature influence is very little.
Therefore, behind the using gases bearing, energy can utilize more thoroughly.
The maximum characteristics of the decompressor of the utility model are exactly to adopt this kind advanced person's technological process; Main purpose is can be with the product nitrogen gas supercharging; Thereby can reduce the exhaust pressure of raw material air compressor, and can reclaim the energy of decompressor, reach energy-saving and emission-reduction and the purpose that improves product competitive ability.
What deserves to be mentioned is: be efficient and the operational reliability that improves this decompressor, this cover decompressor has adopted a lot of technological innovation parts, mainly contains following several aspect:
1, expansion wheel has adopted entad reaction pattern of high efficiency footpath axial flow;
2, impeller of booster adopts the high efficiency back curved three-dimensional flow hooded impeller pattern that leans forward;
3, the nozzle (not shown) adopts high efficiency pneumatic TC-3P supersonic speed blade profile;
4, adopt gas bearing with the air feed band O type circle support of high stability pressurized air tangential;
5, add stop collar between the main shaft end face of rotor and the bearing face, to improve the bearing capacity of bearing;
6, be low temperature or the high temperature wheel back of the body gas of sealed expansion end and pressurized end, contraction or expanded by heating in case bearing is caught a cold and destroy matching gap have adopted at inflating end and pressurized end and all have been provided with blanket gas;
7, for improving the bearing capacity of bearing, left and right sides gas bearing is provided with the different bearing instrument supply gas pipeline of independent supply gas pressure respectively, calculates, confirmed total axial force of rotor, the supply gas pressure numerical value of bearing is set again according to bearing;
8, for avoiding the high temperature and high pressure gas behind the impeller of booster to flow to the bearing direction, adopted the heat exchange structure of the high fin of supercharging spiral case band, the high-temperature gas with in the cooling of charge wheel has also improved supercharging efficient simultaneously;
9, the impeller of booster sealing pair adopts the labyrinth seal of wheel cap tooth, to reduce interior leakage, raises the efficiency;
10, decompressor the using and the reserved adopt integral shaft to assembly structure, and complete sets of equipment does not stop and do not take off pearlife, just can be outside ice chest the laid-up decompressor, and do not influence the operation of complete sets of equipment;
11, former speed measuring position is moved to rotor middle part from the pressurized end inlet pipes, draw the gas that causes because of the tachometer signal line and leak outside and pollute thereby eliminated;
12, for the high pressure-temperature gas after the minimizing supercharging expands bearing through transmission of heat, influence run stability, after supercharging, be provided with the thermal baffle that epoxy resin bonded fiber is processed.
Like Fig. 2, shown in Figure 3; Entad reaction pattern of footpath axial flow expansion wheel is meant: the expansion wheel blade radially is uniformly distributed with at the cylindrical place, reaches the radial air inlet purpose, adopts the cylinder parabolic surface at the inner radius blade; Can be synthetic through the velocity triangle space vector; Reach the axial exhaust purpose, reduce the impact of air-flow, improved efficient the pipeline wall.Through the design of blade structure, air-flow is further expanded in expansion wheel simultaneously, reach the purpose of producing cold.
Like Fig. 4, shown in Figure 5, impeller of booster is generally all taked axial admission, the type of flow of cylindrical exhaust, and blade is in the opposite direction at cylindrical place bending direction and wheel rotation, is called back curved.In the blade pattern; Have only the palintrope pattern most effective, if with back ward impeller in the outlet port along the placement that turns forward again of blade height direction, then become the back curved that leans forward; Take computer three-dimensional flow field analysis computed in software to go out the space curved surface of blade to outlet according to hydrokinetics from import in blade; Weld a wheel cap at place, blade wheel top with the brazing filler metal mode again, so just reduced the purpose of the short stream in place, air-flow trailing wheel top, thereby further improved efficient.
For improving the efficient of this decompressor, adopted the sealing of the wheel back of the body in expansion wheel, the size of wheel back of the body sealing cylindrical has less axial force according to the Axial Force Calculating decision of rotor to guarantee rotor.For improving pressurized end instrument exhaust gas discharging ability, three ф 10 holes on housing, have been bored.When booster expansion machine moves; The high pressure-temperature gas that is easy to take place the impeller of booster back of the body flows to the bearing place along main shaft, thereby makes the bearing expanded by heating, and the end clearance of itself and main shaft is diminished; Seize or stuck phenomenon take place; When after bearing face and main shaft end face have increased a stop collar, it can force the expansion that suppresses end face, to guarantee the fit up gap.For improving the stability of decompressor operation, adopted double-sealing gas and duplex bearing gas, can regulate the pressure of blanket gas and bearing gas, with the axial force of balancing rotor.For improving the reliability of this machine, the spy draws one road nitrogen as instrument supply gas from supercharging and through cooled nitrogen, and this nitrogen pressure is higher; Can improve the bearing capacity of bearing as bearing gas; And this gas can not pollute supercharging nitrogen as blanket gas, and can the balancing rotor axial force.When decompressor moved, at this moment the fault through impeller and sealing cover contact friction take place in regular meeting just must disassemble place under repair with the decompressor movement; During this decompressor, the needs of repairing have been considered in design, the special structure that to dismantle from the normal temperature end that decompressor is designed to; The fluid director end face simultaneously is fixed on the spiral case end face; The other end is compressed by the stuffing box gland end face, has attacked two screws on the end face annulus, dismantles after can being screwed into screw.
Through adopting above-mentioned many innovative design and structure, both guaranteed the high efficiency of entire machine, the high stability when having guaranteed running again.
This decompressor is compared with the oil bearing decompressor, and its design is more optimized, and the axle loss is littler, and the energy utilization is more thorough, and this machine biggest advantage is owing to do not adopt oil lubrication, can not cause oil to bring in the process gas and causes serious security incident.This machine is simple in structure, and price has only about the 1/6-1/8 of same parameter oil bearing decompressor, is 3000Nm in the design swell increment from now on
3During decompressor below the/h; Can consider with gas bearing booster expansion machine displace oil bearing booster expansion machine; Not only provide cost savings with energy-conservation, and can eliminate oily vapour in the oil bearing decompressor to the discharging of atmosphere and air-polluting phenomenon is eliminated the pollution to environment.
Although be the example purpose; The preferred implementation of the utility model is disclosed; But those of ordinary skill in the art will recognize, under situation about not breaking away from by the scope of the disclosed the utility model of appending claims and spirit, various improvement, increase and replacement are possible.
Claims (6)
1. booster expansion turbine after the gas bearing comprises a middle casing, and the left end of said middle casing is installed the turbine spiral case, right-hand member is equipped with volute of booster; Be provided with rotor in the said middle casing rotationally, in turbine spiral case and volute of booster, be provided with expansion wheel and impeller of booster respectively, on said rotor, be arranged with left gas bearing and right gas bearing at the two ends of said rotor; Said left gas bearing is used to support expansion wheel; Said right gas bearing is used to support impeller of booster, between said left gas bearing and said right gas bearing, is provided with the bearing stop collar, and described bearing stop collar is set in outside the said rotor; And fix with said middle casing; It is characterized in that said expansion wheel is entad reaction type of a footpath axial flow expansion wheel, said impeller of booster is the back curved three-dimensional flow hooded impeller type impeller of booster that leans forward.
2. booster expansion turbine after the gas bearing according to claim 1 is characterized in that, the blade of entad reaction type of said footpath axial flow expansion wheel radially is uniformly distributed with at the cylindrical place, adopts the cylinder parabolic surface at the inner radius blade.
3. booster expansion turbine after the gas bearing according to claim 1; It is characterized in that; The said back curved three-dimensional flow hooded impeller type impeller of booster that leans forward is taked axial admission, the type of flow of cylindrical exhaust, and blade is in the opposite direction at cylindrical place bending direction and wheel rotation; And with back ward impeller in the outlet port along the placement that turns forward again of blade height direction, place, said blade wheel top is welded with a wheel cap with the brazing filler metal mode.
4. booster expansion turbine after the gas bearing according to claim 1 is characterized in that, is provided with stuffing box gland between described left gas bearing and the said expansion wheel.
5. booster expansion turbine after the gas bearing according to claim 1 is characterized in that, is provided with collet and spacing sealing plate between said right gas bearing and the said impeller of booster.
6. booster expansion turbine after the gas bearing according to claim 1 is characterized in that, is provided with 8 axial vent holes in said left gas bearing and the right gas bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206080685U CN202100282U (en) | 2010-11-16 | 2010-11-16 | Rear supercharging turboexpander of gas bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206080685U CN202100282U (en) | 2010-11-16 | 2010-11-16 | Rear supercharging turboexpander of gas bearing |
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| Publication Number | Publication Date |
|---|---|
| CN202100282U true CN202100282U (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206080685U Expired - Fee Related CN202100282U (en) | 2010-11-16 | 2010-11-16 | Rear supercharging turboexpander of gas bearing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003221A (en) * | 2010-11-16 | 2011-04-06 | 苏州制氧机有限责任公司 | After-boosted turbo expander for gas bearing |
| CN103161773A (en) * | 2013-03-14 | 2013-06-19 | 中国科学院理化技术研究所 | Heat exchange device based on turbo expander |
| CN105952502A (en) * | 2016-04-28 | 2016-09-21 | 北京科技大学 | Device and method for improving bearing capacity of dynamic-pressure gas bearings of turbine expansion machine |
| CN107288899A (en) * | 2017-08-23 | 2017-10-24 | 福建雪人股份有限公司 | A kind of air centrifugation expansion compression all-in-one |
| CN107882604A (en) * | 2017-12-07 | 2018-04-06 | 刘强 | Pressure energy reclaimer and pipeline pressure energy recovery system |
| CN107893772A (en) * | 2017-10-09 | 2018-04-10 | 中国第汽车股份有限公司 | A kind of centrifugal fuel battery air compressor with energy recovery function |
-
2010
- 2010-11-16 CN CN2010206080685U patent/CN202100282U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003221A (en) * | 2010-11-16 | 2011-04-06 | 苏州制氧机有限责任公司 | After-boosted turbo expander for gas bearing |
| CN103161773A (en) * | 2013-03-14 | 2013-06-19 | 中国科学院理化技术研究所 | Heat exchange device based on turbo expander |
| CN103161773B (en) * | 2013-03-14 | 2015-10-28 | 中国科学院理化技术研究所 | Heat exchange device based on turbo expander |
| CN105952502A (en) * | 2016-04-28 | 2016-09-21 | 北京科技大学 | Device and method for improving bearing capacity of dynamic-pressure gas bearings of turbine expansion machine |
| CN105952502B (en) * | 2016-04-28 | 2018-05-18 | 北京科技大学 | A kind of device and method for improving turbo-expander hydrodynamic gas-lubricated bearing bearing capacity |
| CN107288899A (en) * | 2017-08-23 | 2017-10-24 | 福建雪人股份有限公司 | A kind of air centrifugation expansion compression all-in-one |
| CN107893772A (en) * | 2017-10-09 | 2018-04-10 | 中国第汽车股份有限公司 | A kind of centrifugal fuel battery air compressor with energy recovery function |
| CN107882604A (en) * | 2017-12-07 | 2018-04-06 | 刘强 | Pressure energy reclaimer and pipeline pressure energy recovery system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Suzhou oxygen generator, Limited by Share Ltd patent Manager Document name: Notification that Application Deemed not to be Proposed |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Wuzhong District Mudu town Suzhou city Jiangsu province 215101 Spring Road No. 31 Patentee after: SUZHOU OXYGEN PLANT CO., LTD. Address before: Wuzhong District Mudu town Suzhou city Jiangsu province 215101 Spring Road No. 31 Patentee before: Suzhou Oxygen Plant Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20181116 |