CN103195481B - A kind of screw expansion generating set, organic Rankine cycle power generation system - Google Patents
A kind of screw expansion generating set, organic Rankine cycle power generation system Download PDFInfo
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- CN103195481B CN103195481B CN201310096324.5A CN201310096324A CN103195481B CN 103195481 B CN103195481 B CN 103195481B CN 201310096324 A CN201310096324 A CN 201310096324A CN 103195481 B CN103195481 B CN 103195481B
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Abstract
Present invention is disclosed a kind of screw expansion generating set, organic Rankine cycle power generation system, described electricity generating device comprises semiclosed or totally enclosed housing, arranges screw expander, generator in housing; Rotor and the generator amature of described screw expander are fixedly connected, and described electricity generating device drives electrical power generators by the rotation of rotor of screw expander; Described screw expander comprises at least double expansion machine, namely at least comprises first order decompressor, second level decompressor; The first row gas port of first order decompressor is directly communicated with the second intakeport of second level decompressor; The rotating speed of described first order decompressor and second level decompressor is identical or different; The rotor of output shaft axle of described first order decompressor, the rotor of output shaft axle of second level decompressor drive generator amature jointly.The present invention drives electrical power generators by the rotation of rotor of screw expander, can avoid leaking working medium in using process.Meanwhile, the present invention adopts two-stage or multiple expansion engine, can be used for the occasion of more high pressure ratio.
Description
Technical field
The invention belongs to power generating equipment technical field, relate to a kind of electricity generating device, particularly relate to a kind of screw expansion generating set that can be used for organic Rankine bottoming cycle; Meanwhile, the invention still further relates to a kind of organic Rankine cycle power generation system utilizing above-mentioned screw expansion generating set.
Background technique
Refer to Fig. 1, Fig. 1 is that typical organic Rankine bottoming cycle (Organic Ranking Cycle, ORC) comprises decompressor 4, generator 5, vaporizer 3, liquor pump 2, condenser 1.
The liquid working substance of low-temp low-pressure is boosted in liquor pump 2, and highly pressurised liquid enters vaporizer 3 and is heated to form saturated gas or overheated gas, then enters expansion work in decompressor 4, drives generator 5 to generate electricity.Gas after acting enters condenser 1, becomes saturated or overcooled liquid, again enters liquor pump 2, completes lower whorl circulation.
The existing decompressor for ORC has semi-enclosed centrifugal decompressor, opening type screw expander.The screw expander of opening type goes out axle head and will arrange mechanical seal and guarantee that working medium is without leaking outside, and is gone out axle head and is connected with generator by coupling, but mechanical seal has leakage possibility.
In addition, existing decompressor is all single-stage expansion, and therefore decompressor can not be used for the situation of high pressure ratio.
In view of this, nowadays high in the urgent need to the sealing that designs a mechanism and be applicable to the electricity generating device of high pressure ratio.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of screw expansion generating set, can avoid the refrigerant leakage occurred in screw expander operation process, and utilizes twin-stage to expand or multistage expansion, can be applied to the occasion of high pressure ratio.
For solving the problems of the technologies described above, the present invention adopts following technological scheme:
A kind of screw expansion generating set, described electricity generating device comprises semiclosed or totally enclosed housing, arranges screw expander, generator in housing; Or electricity generating device comprises the housing of unlatching, arrange expansion machine rotor in described housing, generator is arranged at outside housing; Rotor and the generator amature of described screw expander are fixedly connected, and described electricity generating device drives electrical power generators by the rotation of rotor of screw expander; Described screw expander comprises double expansion machine, i.e. high pressure stage decompressor, low pressure stage decompressor, and the high-pressure exhaust of high pressure stage decompressor is directly communicated with the low pressure air suction mouth of low pressure stage decompressor; The rotating speed of described high pressure stage decompressor and low pressure stage decompressor is identical or different; The rotor of output shaft axle of described high pressure stage decompressor, the rotor of output shaft axle of low pressure stage decompressor drive generator amature jointly; The rotor of output shaft axle of described high pressure stage decompressor, the rotor of output shaft axle of low pressure stage decompressor are connected with generator amature by gear; Described high pressure stage decompressor, low pressure stage decompressor all comprise female rotor and male rotor, the external output power of described male rotor; Described housing comprises the high pressure stage rotor chamber, low pressure stage rotor chamber, generator cavity, the gear cavity that interconnect; The rotor of high pressure stage decompressor, the rotor of low pressure stage decompressor are set in high pressure stage rotor chamber, low pressure stage rotor chamber respectively, in generator cavity, generator are set, in gear cavity, meshed gears is set; Described housing is arranged the external intakeport of screw expander, relief opening; Middle aperture is provided with between the high-pressure exhaust of described high pressure stage decompressor and the low pressure air suction mouth of low pressure stage decompressor; Working medium enters housing from intakeport, flows through high pressure stage rotor chamber, middle aperture, low pressure stage rotor chamber, flow out screw expander from relief opening; Part working medium flows through generator, in order to cooled electric generator.
A kind of screw expansion generating set, described electricity generating device comprises semiclosed or totally enclosed housing, arranges screw expander, generator in housing; Or electricity generating device comprises the housing of unlatching, arrange expansion machine rotor in described housing, generator is arranged at outside housing; Rotor and the generator amature of described screw expander are fixedly connected, and described electricity generating device drives electrical power generators by the rotation of rotor of screw expander; Described screw expander comprises at least double expansion machine, namely at least comprises first order decompressor, second level decompressor; The first row gas port of first order decompressor is directly communicated with the second intakeport of second level decompressor; The rotating speed of described first order decompressor and second level decompressor is identical or different; The rotor of output shaft axle of described first order decompressor, the rotor of output shaft axle of second level decompressor drive generator amature jointly.
As a preferred embodiment of the present invention, the rotor of output shaft axle of described first order decompressor, the rotor of output shaft axle of second level decompressor are directly connected with generator amature, or be connected with generator amature by gear.
As a preferred embodiment of the present invention, described housing comprises the rotor chamber at different levels, generator cavity, the gear cavity that interconnect; The rotor of decompressor at different levels is set in described rotor chamber, in generator cavity, generator is set, in gear cavity, meshed gears is set.
As a preferred embodiment of the present invention, described housing is arranged the external intakeport of screw expander, relief opening; Described housing comprises the first rotor chamber, the second rotor chamber; Middle aperture is provided with between the first row gas port of described first order decompressor and the second intakeport of second level decompressor; Working medium enters housing from intakeport, flows through first order rotor chamber, middle aperture, second level rotor chamber, flows out from relief opening; Part working medium flows through generator, in order to cooled electric generator.
As a preferred embodiment of the present invention, every grade of decompressor all comprises female rotor and male rotor, the external output power of described male rotor.
As a preferred embodiment of the present invention, male rotor, the female rotor two ends of every grade of decompressor arrange bearing respectively, comprise radial bearing, thrust-bearing away from axle stretch end, comprise radial bearing near axle stretch end.
As a preferred embodiment of the present invention, described male rotor comprises the molded line part of integrated design, bearing part, attachment portion, hermetic unit, and described male rotor coordinates with female rotor, and gear cavity is stretched in described attachment portion.
As a preferred embodiment of the present invention, described rotor seal part is provided with seal ring or labyrinth seal, seals high pressure gas, avoids inter-stage to leak gas, and can reduce rotor axial power when needing.
A kind of organic Rankine cycle power generation system, described power generation system comprises the screw expansion generating set, vaporizer, liquor pump, the condenser that connect successively;
Described screw expansion generating set comprises semiclosed or totally enclosed housing, arranges screw expander, generator in housing; Or electricity generating device comprises the housing of unlatching, arrange expansion machine rotor in described housing, generator is arranged at outside housing;
Rotor and the generator amature of described screw expander are fixedly connected, and described electricity generating device drives electrical power generators by the rotation of rotor of screw expander;
Described screw expander comprises at least double expansion machine, namely at least comprises first order decompressor, second level decompressor; The first row gas port of first order decompressor is directly communicated with the second intakeport of second level decompressor; The rotating speed of described first order decompressor and second level decompressor is identical or different;
The rotor of output shaft axle of described first order decompressor, the rotor of output shaft axle of second level decompressor drive generator amature jointly.
Beneficial effect of the present invention is: screw expansion generating set, organic Rankine cycle power generation system that the present invention proposes, close or semi-enclosed housing in screw expander, generator are set, rotor and the generator amature of described screw expander are fixedly connected, described electricity generating device drives electrical power generators by the rotation of rotor of screw expander, can avoid leaking working medium in using process.Meanwhile, the present invention adopts two-stage or multiple expansion engine, can be used for the occasion of more high pressure ratio.
Accompanying drawing explanation
Fig. 1 is the composition schematic diagram of existing organic Rankine cycle power generation system.
Fig. 2 is the composition schematic diagram of the organic Rankine cycle power generation system using screw expansion generating set of the present invention.
Fig. 3 is two-stage screw decompressor Vertical direction sectional view of the present invention.
Fig. 4 is two-stage screw decompressor substantially horizontal sectional view of the present invention.
Accompanying drawing primary clustering symbol description is as follows:
1 condenser 2 liquor pump
3 vaporizer 4 decompressors
5 generator 6 condensers
7 liquor pump 8 vaporizers
9 two-stage screw expansion power generator 101 high pressure stage male rotors
102 low pressure stage male rotor 103 train of gearings
104 generator 105 high voltage terminal bearings
106 rotor output 107 intakepories
108 middle aperture 109 relief openings
110 male rotor 111 female rotors
112 low voltage terminal bearings
Embodiment
The preferred embodiments of the present invention are described in detail below in conjunction with accompanying drawing.
Embodiment one
Refer to Fig. 3, Fig. 4, present invention is disclosed a kind of screw expansion generating set, described electricity generating device comprises semiclosed or totally enclosed housing, arranges screw expander, generator 104 in housing; Rotor and the generator amature of described screw expander are fixedly connected, and described electricity generating device is generated electricity by the rotation drive electrical generators 104 of rotor of screw expander.Described screw expander comprises double expansion machine, i.e. high pressure stage decompressor, low pressure stage decompressor, and the high-pressure exhaust of high pressure stage decompressor is directly communicated with the low pressure air suction mouth of low pressure stage decompressor.The rotating speed of described high pressure stage decompressor and low pressure stage decompressor is identical or different.
As shown in Figure 3, the rotor of output shaft axle 106 of described high pressure stage decompressor, the rotor of output shaft axle of low pressure stage decompressor drive generator amature jointly.In the present embodiment, the rotor of output shaft axle 106 of described high pressure stage decompressor, the rotor of output shaft axle of low pressure stage decompressor can be connected with generator amature by train of gearings 103 (certainly, the rotor of output shaft axle 106 of described high pressure stage decompressor, the rotor of output shaft axle of low pressure stage decompressor also can directly be connected with generator amature).
Described housing comprises the high pressure stage rotor chamber, low pressure stage rotor chamber, generator cavity, the gear cavity that interconnect.Shown in Fig. 3, the rotor arranging high pressure stage decompressor in high pressure stage rotor chamber (comprises the high pressure stage male rotor 101 in Fig. 3, high pressure stage female rotor figure does not show), the rotor arranging low pressure stage decompressor in low pressure stage rotor chamber (comprises the low pressure stage male rotor 103 in Fig. 3, low pressure stage female rotor figure does not show), generator 104 is set in generator cavity, meshed gears system 103 is set in gear cavity.
Described housing is arranged the external intakeport of screw expander 107, relief opening 109; Middle aperture 108 is provided with between the high-pressure exhaust of described high pressure stage decompressor and the low pressure air suction mouth of low pressure stage decompressor; Working medium enters housing from intakeport 107, flows through high pressure stage rotor chamber, middle aperture 108, low pressure stage rotor chamber, flow out from relief opening 109; Part working medium flows through generator 104, in order to cooled electric generator 104.
As shown in Figure 4, described high pressure stage decompressor, low pressure stage decompressor all comprise female rotor 111 and male rotor 110, and described male rotor 110 is output power externally.The male rotor 110 of every grade of decompressor, female rotor 111 two ends arrange bearing (comprising the high voltage terminal bearing 105 in Fig. 4, low voltage terminal bearing 112) respectively, comprise radial bearing, thrust-bearing, comprise radial bearing close to axle stretch end away from axle stretch end.
Described male rotor 110 comprises the molded line part of integrated design, bearing part, attachment portion, hermetic unit, and described male rotor 110 coordinates with female rotor 111, and gear cavity is stretched in described attachment portion.Wherein, described rotor seal part is provided with seal ring or labyrinth seal, seals high pressure gas, avoids inter-stage to leak gas, and can reduce rotor axial power when needing.
Be described above the structure of screw expansion generating set of the present invention, the present invention, while the above-mentioned screw expansion generating set of announcement, also discloses a kind of organic Rankine cycle power generation system utilizing above-mentioned screw expansion generating set.
Refer to Fig. 2, described power generation system comprises the two-stage screw expansion power generation device 9, vaporizer 8, liquor pump 7, the condenser 6 that connect successively.The structure of described screw expansion generating set 9 is described above.
In sum, screw expansion generating set, organic Rankine cycle power generation system that the present invention proposes, close or semi-enclosed housing in screw expander, generator are set, rotor and the generator amature of described screw expander are fixedly connected, described electricity generating device drives electrical power generators by the rotation of rotor of screw expander, can avoid leaking working medium in using process.Meanwhile, the present invention adopts two-stage or multiple expansion engine, can be used for the occasion of more high pressure ratio.
Embodiment two
The difference of the present embodiment and embodiment one is, in the present embodiment, screw expander comprises at least double expansion machine, as double expansion machine, three grades of decompressors, or more multiple expansion engine.
Described screw expansion generating set comprises semiclosed or totally enclosed housing, arranges screw expander, generator in housing; Rotor and the generator amature of described screw expander are fixedly connected, and described electricity generating device drives electrical power generators by the rotation of rotor of screw expander; Described screw expander comprises at least double expansion machine, namely at least comprises first order decompressor, second level decompressor; The first row gas port of first order decompressor is directly communicated with the second intakeport of second level decompressor; The rotating speed of described first order decompressor and second level decompressor is identical or different; The rotor of output shaft axle of described first order decompressor, the rotor of output shaft axle of second level decompressor drive generator amature jointly.
The rotor of output shaft axle of described first order decompressor, the rotor of output shaft axle of second level decompressor are directly connected with generator amature, or be connected with generator amature by gear.Every grade of decompressor all comprises female rotor and male rotor, the external output power of described male rotor.
Described housing comprises the rotor chamber at different levels, generator cavity, the gear cavity that interconnect; The rotor of decompressor at different levels is set in described rotor chamber, in generator cavity, generator is set, in gear cavity, engaging gear is set.Described housing is arranged the external intakeport of screw expander, relief opening; Described housing comprises the first rotor chamber, the second rotor chamber; Middle aperture is provided with between the first row gas port of described first order decompressor and the second intakeport of second level decompressor; Working medium enters housing from intakeport, flows through first order rotor chamber, middle aperture, second level rotor chamber, flows out from relief opening; Part working medium flows through generator, in order to cooled electric generator.
Embodiment three
The difference of the present embodiment and embodiment one is, in the present embodiment, electricity generating device comprises the housing of unlatching, and arrange expansion machine rotor in described housing, generator is arranged at outside housing.The rotor of described screw expander passes through driven gear main shaft and the coupling drive electrical generators rotor turns of train of gearings.
Here description of the invention and application is illustrative, not wants by scope restriction of the present invention in the above-described embodiments.Distortion and the change of embodiment disclosed are here possible, are known for the replacement of embodiment those those of ordinary skill in the art and the various parts of equivalence.Those skilled in the art are noted that when not departing from spirit of the present invention or substantive characteristics, the present invention can in other forms, structure, layout, ratio, and to realize with other assembly, material and parts.When not departing from the scope of the invention and spirit, can other distortion be carried out here to disclosed embodiment and change.
Claims (10)
1. a screw expansion generating set, is characterized in that, described electricity generating device comprises semiclosed or totally enclosed housing, arranges screw expander, generator in housing; Or electricity generating device comprises the housing of unlatching, arrange expansion machine rotor in described housing, generator is arranged at outside housing;
Rotor and the generator amature of described screw expander are fixedly connected, and described electricity generating device drives electrical power generators by the rotation of rotor of screw expander;
Described screw expander comprises double expansion machine, i.e. high pressure stage decompressor, low pressure stage decompressor, and the high-pressure exhaust of high pressure stage decompressor is directly communicated with the low pressure air suction mouth of low pressure stage decompressor; The rotating speed of described high pressure stage decompressor and low pressure stage decompressor is identical or different;
The rotor of output shaft axle of described high pressure stage decompressor, the rotor of output shaft axle of low pressure stage decompressor drive generator amature jointly; The rotor of output shaft axle of described high pressure stage decompressor, the rotor of output shaft axle of low pressure stage decompressor are connected with generator amature by gear;
Described high pressure stage decompressor, low pressure stage decompressor all comprise female rotor and male rotor, the external output power of described male rotor;
Described housing comprises the high pressure stage rotor chamber, low pressure stage rotor chamber, generator cavity, the gear cavity that interconnect; The rotor of high pressure stage decompressor, the rotor of low pressure stage decompressor are set in high pressure stage rotor chamber, low pressure stage rotor chamber respectively, in generator cavity, generator are set, in gear cavity, meshed gears is set;
Described housing is arranged the external intakeport of screw expander, relief opening; Middle aperture is provided with between the high-pressure exhaust of described high pressure stage decompressor and the low pressure air suction mouth of low pressure stage decompressor; Working medium enters housing from intakeport, flows through high pressure stage rotor chamber, middle aperture, low pressure stage rotor chamber, flow out screw expander from relief opening; Part working medium flows through generator, in order to cooled electric generator.
2. a screw expansion generating set, is characterized in that, described electricity generating device comprises semiclosed or totally enclosed housing, arranges screw expander, generator in housing; Or electricity generating device comprises the housing of unlatching, arrange expansion machine rotor in described housing, generator is arranged at outside housing;
Rotor and the generator amature of described screw expander are fixedly connected, and described electricity generating device drives electrical power generators by the rotation of rotor of screw expander;
Described screw expander comprises at least double expansion machine, namely at least comprises first order decompressor, second level decompressor; The first row gas port of first order decompressor is directly communicated with the second intakeport of second level decompressor; The rotating speed of described first order decompressor and second level decompressor is identical or different;
The rotor of output shaft axle of described first order decompressor, the rotor of output shaft axle of second level decompressor drive generator amature jointly.
3. screw expansion generating set according to claim 2, is characterized in that:
The rotor of output shaft axle of described first order decompressor, the rotor of output shaft axle of second level decompressor are directly connected with generator amature, or be connected with generator amature by gear.
4. screw expansion generating set according to claim 2, is characterized in that:
Described housing comprises the rotor chamber at different levels, generator cavity, the gear cavity that interconnect;
The rotor of decompressor at different levels is set in described rotor chamber, in generator cavity, generator is set, in gear cavity, meshed gears is set.
5. screw expansion generating set according to claim 4, is characterized in that:
Described housing is arranged the external intakeport of screw expander, relief opening; Described housing comprises the first rotor chamber, the second rotor chamber; Middle aperture is provided with between the first row gas port of described first order decompressor and the second intakeport of second level decompressor;
Working medium enters housing from intakeport, flows through first order rotor chamber, middle aperture, second level rotor chamber, flows out from relief opening; Part working medium flows through generator, in order to cooled electric generator.
6. screw expansion generating set according to claim 2, is characterized in that:
Every grade of decompressor all comprises female rotor and male rotor, the external output power of described male rotor.
7. screw expansion generating set according to claim 6, is characterized in that:
Male rotor, the female rotor two ends of every grade of decompressor arrange bearing respectively, comprise radial bearing, thrust-bearing away from axle stretch end, comprise radial bearing near axle stretch end.
8. screw expansion generating set according to claim 6, is characterized in that:
Described male rotor comprises the molded line part of integrated design, bearing part, attachment portion, hermetic unit, and described male rotor coordinates with female rotor, and gear cavity is stretched in described attachment portion.
9. screw expansion generating set according to claim 8, is characterized in that:
Described rotor seal part is provided with seal ring or labyrinth seal, seals high pressure gas, avoids inter-stage to leak gas, and can reduce rotor axial power when needing.
10. an organic Rankine cycle power generation system, is characterized in that: described power generation system comprises the screw expansion generating set, vaporizer, liquor pump, the condenser that connect successively;
Described screw expansion generating set comprises semiclosed or totally enclosed housing, arranges screw expander, generator in housing; Or electricity generating device comprises the housing of unlatching, arrange expansion machine rotor in described housing, generator is arranged at outside housing;
Rotor and the generator amature of described screw expander are fixedly connected, and described electricity generating device drives electrical power generators by the rotation of rotor of screw expander;
Described screw expander comprises at least double expansion machine, namely at least comprises first order decompressor, second level decompressor; The first row gas port of first order decompressor is directly communicated with the second intakeport of second level decompressor; The rotating speed of described first order decompressor and second level decompressor is identical or different;
The rotor of output shaft axle of described first order decompressor, the rotor of output shaft axle of second level decompressor drive generator amature jointly.
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| CN201310096324.5A CN103195481B (en) | 2013-03-25 | 2013-03-25 | A kind of screw expansion generating set, organic Rankine cycle power generation system |
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| CN201310096324.5A CN103195481B (en) | 2013-03-25 | 2013-03-25 | A kind of screw expansion generating set, organic Rankine cycle power generation system |
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| CN103195481B true CN103195481B (en) | 2015-07-29 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105240229B (en) * | 2015-11-04 | 2018-11-02 | 江西宝象科技有限公司 | Solar light-heat power-generation system |
| CN106703894A (en) * | 2016-12-30 | 2017-05-24 | 山西易通环能科技集团有限公司 | Semi-closed screw power machine for low temperature electricity generation |
| CN108104879A (en) * | 2018-01-17 | 2018-06-01 | 无锡锡压压缩机有限公司 | A kind of screw expander, helical-lobe compressor, the integrated system of motor |
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| CN101581304A (en) * | 2008-05-12 | 2009-11-18 | 株式会社神户制钢所 | Two-stage screw compressor and refrigerating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061944B (en) * | 2010-11-16 | 2012-11-28 | 上海维尔泰克螺杆机械有限公司 | Screw expansion generating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101581304A (en) * | 2008-05-12 | 2009-11-18 | 株式会社神户制钢所 | Two-stage screw compressor and refrigerating device |
| CN101818656A (en) * | 2009-02-26 | 2010-09-01 | 赵育基 | Balance type screw expansion power machine |
| CN201826898U (en) * | 2010-10-29 | 2011-05-11 | 淄博桑特动力设备有限公司 | Double-screw expansion machine |
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