CN202645646U - Booster expansion turbine - Google Patents
Booster expansion turbine Download PDFInfo
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- CN202645646U CN202645646U CN 201220062320 CN201220062320U CN202645646U CN 202645646 U CN202645646 U CN 202645646U CN 201220062320 CN201220062320 CN 201220062320 CN 201220062320 U CN201220062320 U CN 201220062320U CN 202645646 U CN202645646 U CN 202645646U
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- booster
- wheel
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- impeller
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Abstract
The utility model provides a booster expansion turbine, and especially refers to a gas bearing booster expansion turbine. The booster expansion turbine comprises a middle shell, wherein a turbine volute is disposed on a left end of the middle shell, a supercharger volute is disposed on a right end of the middle shell, a rotor is rotatablely disposed in the middle shell, an expansion wheel and a supercharge wheel are disposed at two ends of the rotor respectively, and two air bearings are sleeved on the rotor for supporting the expansion wheel and the supercharge wheel. The beneficial effects of the booster expansion turbine are mainly being simple in structure, low in shaft wear, low in costs, excellent in safety performance, and capable of reducing fuel vapor discharge of an oil bearing expansion machine and reducing pollution to the environment. The abovementioned excellent natures of the booster expansion turbine will lay a milestone foundation for the development of the booster expansion turbines.
Description
Technical field
The utility model relates to a kind of booster expansion turbine, especially a kind of booster expansion turbine that uses gas bearing.
Background technique
Booster expansion turbine is that air separation equipment and rock gas petroleum gas liquification separation equipment and low temperature breaking equipment etc. obtain the necessary crucial section of cold machine, is the heart that guarantees complete equipment stable operation.Its cardinal principle is to utilize the gas that certain pressure is arranged to carry out externally acting and consume the interior energy of gas itself of adiabatic expansion in turbo-expander, 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.
Booster expansion turbine comprises a middle casing, the left end of middle casing is installed the turbine spiral case, right-hand member is equipped with volute of booster, be provided with rotor in the middle casing, in turbine spiral case and volute of booster, be provided with respectively expansion wheel and impeller of booster at the two ends of rotor.Present booster expansion turbine is used for supporting the general employing oil bearing of expansion wheel and impeller of booster, and this structure can be brought a lot of inconvenience.Because the working medium of oil bearing is lubricant oil, and lubricant oil might leak from the outlet port of inflating end in the working procedure of decompressor, this moment, lubricant oil just contacted with air, and the danger of burning just might be arranged; In addition, owing to need to provide lubricant oil to oil bearing, so generally also need to increase a cover oil supply system in the work system of decompressor, this will increase the cost of a whole set of expander system and the complexity of structure.
Expansion wheel and the impeller of booster of at present booster expansion turbine use generally are to be formed by aluminum casting, and the expansion wheel that obtains like this and impeller of booster are all comparatively coarse, affect the performance of whole decompressor.In addition, because present expansion wheel and the shape cause of impeller of booster blade, cause its working efficiency neither be very high.
Summary of the invention
[0005] the purpose of this utility model is to solve above-mentioned technical problem, provides that a kind of Safety performance is good, cost is low, simple in structure, energy consumption is less and booster expansion turbine that efficient is higher.
The purpose of this utility model is achieved through the following technical solutions:
A kind of booster expansion turbine, comprise a middle casing, the left end of described middle casing is installed the turbine spiral case, right-hand member is equipped with volute of booster, be provided with rotationally rotor in the described middle casing, two ends at described rotor are provided with respectively expansion wheel and impeller of booster in turbine spiral case and volute of booster, be arranged with left gas bearing and right gas bearing at described rotor, described left gas bearing is used for supporting expansion wheel, be provided with stuffing box gland between described left gas bearing and the expansion wheel, described right gas bearing is used for supporting impeller of booster, be provided with the position limiting sealed plate between described right gas bearing and the impeller of booster, be connected with 4 adapter assemblies on the described middle casing, be respectively left, right gas bearing provides bearing gas, and provide blanket gas for stuffing box gland and position limiting sealed plate, described impeller of booster comprises wheel disc and the wheel cap that interfixes, and described wheel disc is provided with blade, and the blade of described impeller of booster is that upwards one is long and the other is short week is staggered.
Further, be provided with the bearing stop collar between described left gas bearing and the right gas bearing, described bearing stop collar is set in outside the rotor and with middle casing and cooperates.
Described expansion wheel comprises wheel disc and the wheel cap that interfixes, and is evenly equipped with blade on the described wheel disc, and described blade is the parabolic setting of cylinder.Connect fixing for soldering between the wheel disc of described expansion wheel and the wheel cap.The surface of the wheel cap of described expansion wheel is provided with 4 ring teeth.
The blade of described described impeller of booster comprises 7 linear leafs and 7 short blades.The surface of the wheel cap of described impeller of booster is provided with 4 ring teeth.
Further, be provided with fluid director between described turbine spiral case and the expansion wheel, after gas is entered by the turbine volute inlet, the expansion wheel of after the fluid director mean allocation, flowing through again.
The beneficial effects of the utility model are mainly reflected in: simple in structure, the axle loss is little, and the energy utilization is thorough, and the average isentropic efficiency of decompressor reaches 82.15%, the average isentropic efficiency of pressure-increasing machine reaches 74.8%, and price only has about the 1/6-1/8 of same parameter oil bearing decompressor; Safety performance is good, does not have the danger of burning; And can reduce the discharging of oily vapour in the oil bearing decompressor, reduced the pollution to environment.In addition, use numerical control milling machine processing simple expansion wheel and impeller of booster, and on both wheel discs, all be welded with wheel cap, the working efficiency of whole booster expansion turbine is further enhanced.
Description of drawings
Below in conjunction with accompanying drawing technical solutions of the utility model are described further:
Fig. 1: the sectional view of the utility model booster expansion turbine.
Fig. 2: the cut-away view of the expansion wheel of the utility model booster expansion turbine.
Fig. 3: the plan view of the expansion wheel of the utility model booster expansion turbine.
Fig. 4: the enlarged view of A part among Fig. 2.
Fig. 5: the cut-away view of the impeller of booster of the utility model booster expansion turbine.
Fig. 6: the plan view of the impeller of booster of the utility model booster expansion turbine.
Fig. 7: the enlarged view of B part among Fig. 5.
Wherein.
Embodiment
As shown in Figure 1, the utility model has disclosed a kind of gas bearing supercharging turboexpander, the same with prior art, comprise a middle casing 2, the left end of described middle casing 2 is installed turbine spiral case 1, right-hand member is equipped with volute of booster 3, be provided with rotationally rotor 8 in the described middle casing 2, in turbine spiral case 1 and volute of booster 3, be provided with respectively expansion wheel 4 and impeller of booster 12 at the two ends of described rotor 8.Be with the prior art difference, be arranged with left gas bearing 6 and right gas bearing 9 at described rotor 8, described left gas bearing 6 is used for supporting expansion wheel 4, and described right gas bearing 9 is used for supporting impeller of booster 12.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.
Because the oiling agent of gas bearing is air, so do not worry the problem that whether can burn.In addition, gas bearing also has following characteristics.1. frictional resistance is extremely low: because gas viscosity is more much lower than liquid, at room temperature air viscosity only is five a thousandths of No. 10 machinery oil, and the frictional resistance of bearing is directly proportional with viscosity, so the frictional ratio fluid lubricated bearing of gas bearing is low.2. applicable velocity range is large: the frictional resistance of gas bearing is low, and temperature rise is low.3. the Applicable temperature scope is wide: gas can keep gaseous state in the temperature range greatly, and its viscosity temperature influence is very little.Therefore after using gas bearing, it is more thorough that energy can utilize.
When booster expansion turbine moves, the high pressure-temperature gas that is easy to occur the impeller of booster back of the body flows to the bearing place along main shaft, thereby make the bearing expanded by heating, the end clearance of itself and main shaft is diminished, seize or stuck phenomenon occur, the utility model is provided with bearing stop collar 7 between left gas bearing 6 and right gas bearing 9, it is outer and fixing with middle casing 2 that described bearing stop collar 7 is set in rotor 8.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.
In order further to improve the bearing capacity of bearing, the utility model is provided with respectively the different bearing instrument supply gas pipeline of independent supply gas pressure to left gas bearing and right gas bearing, calculate, determined total axial force of rotor 8 according to bearing, the supply gas pressure numerical value of bearing is set again.Simultaneously, in order to be the axial force of balancing rotor, increase pressure-measuring-point at impeller of booster back of the body place, be back to the pressurized end import or improve impeller of booster blanket gas pressure behind according to the pressed gas of its numerical value after with impeller of booster.
The left end of turbine spiral case 1 of the present utility model is connected with Diffuser 13, and linking with Diffuser 13 is connected with an interior Diffuser 14, and described interior Diffuser 14 is arranged on the inside of turbine spiral case 1.The right-hand member of turbine spiral case 1 is connected with thermal shield 16 and connecting sleeve 17, is socketed on the middle casing 2.Be provided with fluid director 15 between described turbine spiral case 1 and the expansion wheel 4, as shown in figure 10, the surface of fluid director 15 is evenly equipped with a projection that encloses the gas channeling effect.After gas is entered by turbine spiral case 1 entrance, the expansion wheel 4 of after fluid director 15 mean allocation, flowing through again.
Be provided with stuffing box gland 5 between described left gas bearing 6 and the expansion wheel 4, be provided with collet 10 and position limiting sealed plate 11 between described right gas bearing 9 and the impeller of booster 12.Like this, so that the outer leakage quantity of gas be controlled in the minimum scope.Simultaneously for sealed expansion end and pressurized end low temperature after high temperature wheel back of the body gas, contraction or expanded by heating in case bearing is caught a cold and destroy matching gap all are provided with blanket gas at inflating end and low-temperature end; For the high temperature and high pressure gas that reduces after the supercharging expands bearing by the heat conduction, the stability of impact running is provided with the thermal baffle 36 that epoxy resin bonded fiber is made after supercharging.
As shown in Figure 1, be provided with 4 adapter assemblies at middle casing 2, provide bearing gas and blanket gas thereby connect respectively source of the gas.Wherein, adapter assembly 18a provides bearing gas for left gas bearing 6, and adapter assembly 18b provides bearing gas for right gas bearing 9, and adapter assembly 18c provides blanket gas for spacing sealing plate 11, and adapter assembly 18d provides blanket gas for stuffing box gland 5.So just not needing needs to provide an oil supply system to decompressor as prior art, thus of the present utility model simple in structure, with low cost, and improved the stability of decompressor operation.
In addition, the utility model has moved on to the speed measuring position of rotor the middle part of rotor from common pressurized end inlet pipes, thereby eliminated and drawn the gas that causes because of the tachometer signal line and leak outside, it is the adapter assembly that also is provided with a connection tachometer on the middle casing 2, the point of contact of adapter assembly inside abuts on the rotor 8, is used for measuring in expansion wheel work the rotating speed of rotor.
Shown in Fig. 2,3,4, expansion wheel of the present utility model comprises wheel disc 41 and the wheel cap 42 that interfixes, and connects fixingly for soldering between wheel disc 41 and the wheel cap 42 in this preferred embodiment, and certainly the utility model is not got rid of other the mode that is fixedly connected with.Be evenly equipped with blade 43 on the described wheel disc 41, described blade 43 is the setting of cylinder parabola, and the cylindrical cross-section of two relative faces of blade 43 is parabolic, namely dissects two surfaces of blade with the concentric circle cylinder, and the cross surface of cutting of formation is parabola.Such setting, make gas along turbine spiral case 1 after the fluid director mean allocation, speed can reach more than 200 meter per seconds, the blade of air-flow and expansion wheel is at a certain angle, impact expansion wheel and make its high speed rotating, then air-flow enters into expansion wheel along the radial direction of blade, in expansion wheel, change its direction after, axial direction along expansion wheel flows out, and namely this moment, gas was axially to flow in centripetal footpath.In addition, nozzle adopts high efficiency pneumatic TC-3P supersonic speed blade profile, is in the leading level in the world.
The utility model expansion wheel adopts journal axle to flow to heart reactionary style hooded impeller pattern.So-called reactionary style refers to that the air-flow in the decompressor only carries out demi-inflation in nozzle, just enters expansion wheel with certain speed, promotes the expansion wheel rotation.Air-flow also further expands after entering expansion wheel, and the recoil force that the further expansion of air-flow produces further promotes externally acting of expansion wheel rotation.This recoil force erect image advances the same from the high velocity air promotion rocket of rocket motor afterbody ejection.Concerning the reactionary style decompressor, pressure is divided into twice landing in fluid director and expansion wheel.It also is so that the enthalpy of gas changes, and namely changes part energy in fluid director, changes again part energy in expansion wheel.Usually the degree of reaction that turbo-expander is called turbo-expander at what (being the reduction numerical value of enthalpy) of expansion wheel self-energy conversion and the ratio of quantity (total enthalpy drop) by fluid director and the conversion of the whole level of impeller self-energy.Obviously, concerning traditional impulse expansion turbine, degree of reaction is zero, reaction turbine is expanded hungry, and degree of reaction is generally about 0.5.Because the pressure drop of air-flow in nozzle is very large in impulse expansion turbine, generally from about 0.55MPa (absolute pressure), be down to about 0.135MPa (absolute pressure), the speed of jet expansion air-flow is very high, flow losses are large, thereby efficient is lower, and efficient generally only has 68% one 72%.For the reaction turbine decompressor, the Pressure Drop in nozzle generally is to be down to about 0.27MPa from 0.55MPa, and gas flow velocity at nozzle outlet is relatively low, and flow losses are also less.Efficiency of expander generally can reach 80% one 90%.Therefore, the impulse expansion turbine that the reactionary style decompressor is relatively traditional, working efficiency has improved a lot.
Further, the surface of described wheel cap 42 is provided with 4 ring teeth 44, and the surface engagement formation labyrinth sealing with interior Diffuser 14 makes the sealing effect of whole decompressor better, has reduced the gas inner leakage flow.In addition, wheel disc 41 and wheel cap 42 are the wrought aluminium machining and form.This preferred embodiment is that numerical control milling machine processes, and the input coordinate value just can process expansion wheel of the present utility model, and is simple and convenient.
Shown in Fig. 5,6,7, impeller of booster 12 of the present utility model adopts the high efficiency back curved three-dimensional flow hooded impeller pattern that leans forward, comprise the wheel disc 121 and the wheel cap 122 that interfix, connect fixingly for soldering between wheel disc 121 and the wheel cap 122 in this preferred embodiment, certainly the utility model is not got rid of other the mode that is fixedly connected with.Described wheel disc 121 is provided with blade 123.It is staggered that blade week, upwards one is long and the other is short, each seven of linear leaf and short blades.
Further, the surface of described wheel disc 121 is provided with 4 ring teeth 124, with the surface engagement formation labyrinth sealing of end cover body 19; The surface of described wheel cap 122 is provided with 4 ring teeth equally, and the surface engagement formation labyrinth sealing with position limiting sealed plate 11 makes the sealing effect of whole decompressor better like this, guarantees that gas internal leakage flow reduces.In addition, wheel disc 121 and wheel cap 122 are the wrought aluminium machining and form.This preferred embodiment is that numerical control milling machine processes, and the input coordinate value just can process impeller of booster of the present utility model, and is simple and convenient.
In the utility model, all adopted the sealing of the wheel back of the body behind expansion wheel and impeller of booster, the size of wheel back of the body sealing cylindrical determines to have less axial force to guarantee rotor according to the Axial Force Calculating of rotor.
The below introduces the gas flow direction of the utility model decompressor.At inflating end, gas enters from the entrance of turbine spiral case 1, and then the expansion wheel 4 of flowing through again after fluid director 15 mean allocation flows out from Diffuser 13 ends.At pressurized end, gas enters from the entrance of end cover body 19, and then the impeller of booster 12 of flowing through flows out from the outlet of volute of booster 3.Expansion ratio of the present utility model reaches 6.8, and pressure ratio is 1.408.In addition, for decompressor, the method for most economical best adjusting function is to change the nozzle vane height, when decompressor is in different operating mode, the cold that needs may be different, at this moment just can take to regulate expansion tolerance with the nozzle of different leaves height.
The utility model still has multiple concrete mode of execution, and all employings are equal to replacement or equivalent transformation and all technological schemes of forming, all drop within the claimed scope of the utility model.
Claims (9)
1. booster expansion turbine, comprise a middle casing (2), the left end of described middle casing (2) is installed turbine spiral case (1), right-hand member is equipped with volute of booster (3), be provided with rotationally rotor (8) in the described middle casing (2), two ends at described rotor (8) are provided with respectively expansion wheel (4) and impeller of booster (12) in turbine spiral case (1) and volute of booster (3), it is characterized in that: be arranged with left gas bearing (6) and right gas bearing (9) at described rotor (8), described left gas bearing (6) is used for supporting expansion wheel (4), be provided with stuffing box gland (5) between described left gas bearing (6) and the expansion wheel (4), described right gas bearing (9) is used for supporting impeller of booster (12), be provided with position limiting sealed plate (11) between described right gas bearing (9) and the impeller of booster (12), be connected with 4 adapter assemblies on the described middle casing (2), be respectively left, right gas bearing (6,9) provide bearing gas, and provide blanket gas for stuffing box gland (5) and position limiting sealed plate (11), described impeller of booster (12) comprises wheel disc (121) and the wheel cap (122) that interfixes, described wheel disc (121) is provided with blade (123), and the blade of described impeller of booster is that upwards one is long and the other is short week is staggered.
2. booster expansion turbine according to claim 1, it is characterized in that: be provided with bearing stop collar (7) between described left gas bearing (6) and the right gas bearing (9), described bearing stop collar (7) is set in outside the rotor (8) and with middle casing (2) and cooperates.
3. booster expansion turbine according to claim 1, it is characterized in that: described expansion wheel (4) comprises wheel disc (41) and the wheel cap (42) that interfixes, be evenly equipped with blade (43) on the described wheel disc (41), described blade (43) is the parabolic setting of cylinder.
4. booster expansion turbine according to claim 3 is characterized in that: connect fixing for soldering between the wheel disc (41) of described expansion wheel (4) and the wheel cap (42).
5. booster expansion turbine according to claim 4 is characterized in that: the surface of the wheel cap (42) of described expansion wheel (4) is provided with 4 ring teeth (44).
6. booster expansion turbine according to claim 1, it is characterized in that: the blade of described impeller of booster (123) comprises 7 linear leafs and 7 short blades.
7. booster expansion turbine according to claim 6 is characterized in that: connect fixing for soldering between the wheel disc (121) of described impeller of booster (12) and the wheel cap (122).
8. booster expansion turbine according to claim 7 is characterized in that: the surface of the wheel cap (122) of described impeller of booster (12) is provided with 4 ring teeth (124).
9. booster expansion turbine according to claim 1, it is characterized in that: be provided with fluid director (15) between described turbine spiral case (1) and the expansion wheel (4), after gas is entered by turbine spiral case (1) entrance, the expansion wheel (4) of after fluid director (15) mean allocation, flowing through again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220062320 CN202645646U (en) | 2012-02-24 | 2012-02-24 | Booster expansion turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220062320 CN202645646U (en) | 2012-02-24 | 2012-02-24 | Booster expansion turbine |
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| Publication Number | Publication Date |
|---|---|
| CN202645646U true CN202645646U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220062320 Expired - Lifetime CN202645646U (en) | 2012-02-24 | 2012-02-24 | Booster expansion turbine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661174A (en) * | 2012-02-24 | 2012-09-12 | 苏州制氧机有限责任公司 | Supercharged turbo expander |
| 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 |
| CN103746493A (en) * | 2014-01-07 | 2014-04-23 | 天津大学 | Main shaft sealing device of high-speed turbine-generator applied to ORC (organic Rankine cycle) |
| CN107701241A (en) * | 2017-11-09 | 2018-02-16 | 联优机械(常熟)有限公司 | The spray nozzle flow regulator of turbo-expander |
-
2012
- 2012-02-24 CN CN 201220062320 patent/CN202645646U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661174A (en) * | 2012-02-24 | 2012-09-12 | 苏州制氧机有限责任公司 | Supercharged turbo expander |
| 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 | Based on the heat-exchanger rig of turbo-expander |
| CN103746493A (en) * | 2014-01-07 | 2014-04-23 | 天津大学 | Main shaft sealing device of high-speed turbine-generator applied to ORC (organic Rankine cycle) |
| CN103746493B (en) * | 2014-01-07 | 2016-08-17 | 天津大学 | A kind of main shaft sealing device of the high rate turbine-electromotor being applied to ORC |
| CN107701241A (en) * | 2017-11-09 | 2018-02-16 | 联优机械(常熟)有限公司 | The spray nozzle flow regulator of turbo-expander |
| CN107701241B (en) * | 2017-11-09 | 2023-08-22 | 联优机械(常熟)有限公司 | Nozzle flow regulator for turbine expander |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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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| CX01 | Expiry of patent term |
Granted publication date: 20130102 |
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| CX01 | Expiry of patent term |