CN102003214B - Novel screw expanding power machine - Google Patents
Novel screw expanding power machine Download PDFInfo
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- CN102003214B CN102003214B CN2010105860082A CN201010586008A CN102003214B CN 102003214 B CN102003214 B CN 102003214B CN 2010105860082 A CN2010105860082 A CN 2010105860082A CN 201010586008 A CN201010586008 A CN 201010586008A CN 102003214 B CN102003214 B CN 102003214B
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Abstract
The invention discloses a novel screw expanding power machine, mainly comprising a cylinder block, a power machine screw rotor pair, an air sucking terminal block, and an air exhausting terminal block, wherein the power machine screw rotor pair is arranged in the cylinder block and comprises a male rotor and a female rotor which are intermeshed. The novel screw expanding power machine is characterized in that: a screw rotor adopts bilateral symmetrical arc molded lines; the air sucking terminal block and the air exhausting terminal block are double-wall sandwich structures with cooling water in the sandwich layers; the air sucking terminal block and the air exhausting terminal block are respectively and detachably arranged at two ends of the cylinder block; an air sucking passage is arranged above the air sucking terminal block; an axial air sucking orifice communicated with the air sucking passage is arranged on the air sucking terminal block and a radial air sucking orifice communicated with the air sucking passage is arranged in the cylinder block near the air sucking orifice; an air exhausting passage is arranged at the lower part of the cylinder block; and a radial air exhausting orifice communicated with the air exhausting passage is arranged at the lower interior inside the cylinder block near the air exhausting terminal block. The novel screw expanding power machine has the advantages of reliable motion, convenience for assembling and maintenance, stability in operation, high efficiency, strong adaptability to working conditions, and low vibration and noise.
Description
Technical field
The present invention relates to a kind of screw expander, relate in particular to a kind of new screw expansion motive power machine.
Background technique
Along with the attention of China to using energy source, increasing energy-conservation and energy recovery utilization technology is developed.In each big industrial and mining enterprise produces, can produce industrial exhaust heats such as a large amount of heat, steam, flue gas, this is a kind of important secondary energy.Particularly in industries such as chemical industry, oil refining, metallurgy, papermaking, proportion is very big.Along with in the commercial production to the attention of the utilization of the reducing energy consumption of equipment and secondary energy, industrial exhaust heat begins to obtain to utilize.Wherein, utilizing decompressor that these secondary energy are recycled is a kind of development technology comparatively rapidly.All the time, adopting more in the industrial trade is turbo-expander.Owing to receive the restriction of turbomachinery characteristic, the type unit can only be to utilizing to some high-quality waste heats, and there is bigger narrow limitation in the application in the heat recovery field.
In recent years, a kind of appearance of screw expander has remedied the defective of turbo-expander, makes that some gas source and flow amounts are less, and the residual heat resources utilization that steam quality is lower becomes a reality.Screw expansion motor is to utilize media such as steam, hot water, hydrothermal solution or stream-liquid two-phase flow body to be power source; Thermal power transfer is power and drives machinery such as generator, blower fan, water pump, compressor, stirrer, coal pulverizer, flour mill; Substitute original motor, large-scale refrigerator expansion valve etc. and reclaim power, be widely used in fields such as electric power, chemical industry, oil, metallurgy, mine, light industry, heating sub-district and megastore, hotel.
Yet existing domestic screw expander manufacturer comparatively payes attention to the system design of recovery waste heat mostly, and has ignored the power research and design of screw expansion motor.Most of unit power engines only are that the main frame to the common screw compressor carries out the part transformation, for example its intakeport and relief opening are exchanged, and just it are used as decompressor, thereby make the efficient of unit and reliability low, and the overall performance level is not high.
Summary of the invention
The object of the invention is exactly the defective that to adopt helical-lobe compressor to repack the expander power machine in the past and produce in order to overcome; A kind of a kind of new screw expansion motive power machine that aims at decompressor operating mode and operation characteristic design is provided, has good characteristic efficient, that running is reliable and stable.
The technological scheme that the present invention takes is: a kind of new screw expansion motive power machine mainly comprises: cylinder block, power engine screw rotor are to, suction end base, exhausting end base; Described screw rotor comprises intermeshing male rotor and female rotor to being arranged in the cylinder block; Be characterized in: the molded lines of described screw rotor adopts bilateral symmetry circular arc molded lines; Described suction end base and exhausting end base are dual-layer wall sandwich structure, pass to cooling water in the interlayer; The dismountable respectively said cylinder block two ends that are arranged on of this suction end base and exhausting end base; The top of said suction end base is provided with air intake passage; Described suction end base is provided with the axial air-breathing aperture that connects with said air intake passage, is provided with the radial suction aperture that connects with said air intake passage in the cylinder block inside near this air-breathing aperture; Described cylinder block bottom is provided with the exhaust passage; Be provided with the rod radial air vent mouth that connects with the exhaust passage in cylinder block lower inner near said exhausting end base.
Above-mentioned a kind of new screw expansion motive power machine, wherein, the shape in described axial air-breathing aperture is consistent with the profile line of the end face molded lines of said yin, yang rotor.
Above-mentioned a kind of new screw expansion motive power machine, wherein, described radial suction aperture is axially hollowed out along yin, yang rotor cylindrical helix by the layout angle according to axial air-breathing aperture and constitutes.
Above-mentioned a kind of new screw expansion motive power machine, wherein, described rod radial air vent mouth is made up of hollowing out along yin, yang rotor cylindrical helix of offering according to the exhaust angle.
Above-mentioned a kind of new screw expansion motive power machine, wherein, the angular dimension of described axial air-breathing aperture, radial suction aperture and rod radial air vent mouth all requires to set according to actual working conditions and preset expansion ratio.
Above-mentioned a kind of new screw expansion motive power machine; Wherein, Between cog volume when the angle that described axial air-breathing aperture and radial suction aperture are provided with is air-breathing the end is the position of volume and the product of the inverse of interior volume specific ratio between maximum tooth, the position that rotor belonged to when the angle of described vent ports setting reached volume between maximum tooth for the between cog volume.
Above-mentioned a kind of new screw expansion motive power machine, wherein, described male rotor and female rotor are by loading ability of bearing, and described bearing adopts sliding bearing.
Above-mentioned a kind of new screw expansion motive power machine wherein, also comprises the axle envelope that is used to isolate, and is arranged between described bearing and the cylinder block cavity.
Because the present invention has adopted above technological scheme, the technique effect of its generation is tangible:
1, screw expansion motor of the present invention helps assembling and maintenance because employing is formed housing by cylinder block, suction end base, exhausting end base three parts; And help arranging comparatively complicated gland seal system and bearing type, to improve the reliability of power engine;
2, the suction end base of screw expansion motor of the present invention and exhausting end base pass to cooling water owing to be designed to double-wall structure in the interlayer, can guarantee under the working condition of HTHP, guarantee the shaft seal structure of rotor and the normal operation of bearing;
3, the suction of screw expansion motor of the present invention, vent ports all design according to actual working conditions; Axial air-breathing orifice shapes is according to screw rotor flute profile molded lines and helix shape design; Help gas flow, reduce additional energy loss, help improving power engine efficient.Can reduce simultaneously power engine vibration and noise;
4, the screw rotor molded lines of screw expansion motor of the present invention is easy to design, makes owing to adopt bilateral symmetry circular arc molded lines, can reduce the power engine cost.It is strong that working condition adaptability such as counter-rotating simultaneously decompressor are taken place in running.Because therefore screw expander generally can not adopt bilateral symmetry circular arc molded lines little to the negative effect of volumetric efficiency to internal body oil spout or hydrojet.
Description of drawings
Concrete structure of the present invention is further provided by following embodiment and accompanying drawing thereof.
Fig. 1 is the form structure schematic representation of a kind of new screw expansion motive power machine of the present invention.
Fig. 2 is the sectional view of a kind of new screw expansion motive power machine of the present invention.
Fig. 3 is the structural representation that the suction end base of a kind of new screw expansion motive power machine of the present invention shows a kind of embodiment in axial air-breathing aperture.
When Fig. 4 is the cylinder block expansion of a kind of new screw expansion motive power machine of the present invention, a kind of embodiment's of the radial suction aperture that demonstration is inner and the structure of rod radial air vent mouth schematic representation.
Embodiment
See also Fig. 1, Fig. 2.The present invention is a kind of a kind of new screw expansion motive power machine that uses to the heat recovery working condition, comprising: cylinder block 1, power engine screw rotor to 2, suction end base 3, exhausting end base 4.Described power engine screw rotor is arranged in the cylinder block 2, comprises intermeshing male rotor 21 and female rotor 22, all adopts bilateral symmetry circular arc molded lines.Described suction end base 3 is arranged in cylinder block 1 two ends with exhausting end base 4.Suction end base and exhausting end base all are designed to double-wall structure, pass to cooling water in the interlayer.On suction end base 3, be provided with air intake passage 5.Be provided with exhaust passage 6 in cylinder block 1 bottom.
Male rotor 21 of the present invention and female rotor 22 carry institute examples like male rotor among Fig. 2 21 by bearing 7 by loading ability of bearing.Mostly the operating mode of considering decompressor is HTHP, be to improve the reliability of power engine, handles the form that the bigger power engine of tolerance (for example male rotor nominal diameter>408mm) adopts sliding bearing.Isolate through axle envelope 8 between bearing and cavity, prevent the gas leakage in the decompressor cavity.
Please cooperate and consult Fig. 3, Fig. 3 is the structural representation that the suction end base of a kind of new screw expansion motive power machine of the present invention shows axial air-breathing aperture.The present invention has axial air-breathing aperture 51 on suction end base 3, this axial air-breathing orifice shapes is arranged according to the profile of the end face molded lines of male rotor 21 and female rotor 22.
Please cooperate and consult Fig. 4, Fig. 4 is that the cylinder block of a kind of new screw expansion motive power machine of the present invention shows the inner radial suction aperture and the structural representation of rod radial air vent mouth when launching.The present invention is in cylinder block 1 inside near axial air-breathing aperture 51, and the layout angle in the axial air-breathing aperture 51 of foundation axially hollows out with air intake passage along male rotor 21 and female rotor 22 cylindrical helixes and connects as radial suction aperture 52.In cylinder block 1 bottom, near cylinder block 1 inside of exhausting end base 4, be provided with according to what the exhaust angle was offered and hollow out the rod radial air vent mouth 62 that connects with the exhaust passage along male rotor 21 and female rotor 22 cylindrical helixes.
The angular dimension of axial air-breathing aperture of the present invention, radial suction aperture and rod radial air vent mouth all requires to set according to actual working conditions and preset expansion ratio.Between cog volume when the angle that described axial air-breathing aperture and radial suction aperture are provided with is air-breathing the end is the product position of volume and the inverse of interior volume specific ratio between maximum tooth, the position that rotor belonged to when the angle of described vent ports setting reached volume between maximum tooth for the between cog volume.Like Fig. 3, shown in Figure 4.When for example this screw expander suction and discharge aperture is 2.5 designs by interior volume specific ratio; Between cog volume when the angle that air-breathing aperture is provided with is air-breathing the end is 1/2.5 position of volume between maximum tooth, the position at rotor place when the angle of vent ports setting reaches volume between maximum tooth for the between cog volume.
During actual motion: by the between cog volume that axially reaches 22 of axial air-breathing aperture 51 and radial suction aperture 52 these screw expander male rotors 21 of entering and female rotors, make opposite direction with female rotor 22 and rotate by promotion male rotor 21 through air intake passage 5 for high temperature and high pressure steam.Along with the rotation of screw rod, the between cog volume of male rotor 21 and female rotor 22 is with after axial air-breathing aperture 51 and radial suction aperture 52 finish to be communicated with, owing to differential pressure action; Male rotor 21 is rotated further with female rotor 22, and stroke extends gradually, and the between cog volume of male rotor 21 and female rotor 22 continues to increase; The gas that is closed in the HTHP in the between cog volume expands, and decrease temperature and pressure reaches maximum value until the between cog volume; Be communicated with rod radial air vent mouth 62, low-temp low-pressure gas is discharged by exhaust passage 6.Male rotor 21 and female rotor 22 high-speed rotation under the gas expansion are connect with external agency by male rotor 21 projecting shafts 9, externally output work.
The present invention has reliable in action, it is stable to be convenient to assemble and overhaul, to turn round, efficient is high, working condition adaptability is strong, vibration and the low advantage of noise.
The above is merely preferred embodiment of the present invention, and all equivalences of being done according to claim scope of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (5)
1. new screw expansion motive power machine mainly comprises: cylinder block, power engine screw rotor are to, suction end base, exhausting end base; Described screw rotor comprises intermeshing male rotor and female rotor to being arranged in the cylinder block; It is characterized in that:
The right molded lines of described screw rotor adopts bilateral symmetry circular arc molded lines;
Described suction end base and exhausting end base are dual-layer wall sandwich structure, pass to cooling water in the interlayer; The dismountable respectively said cylinder block two ends that are arranged on of this suction end base and exhausting end base;
The top of said suction end base is provided with air intake passage; Described suction end base is provided with the axial air-breathing aperture that connects with said air intake passage, is provided with the radial suction aperture that connects with said air intake passage in the cylinder block inside near this air-breathing aperture; The shape in described axial air-breathing aperture is consistent with the profile line of the end face molded lines of said yin, yang rotor; Described radial suction aperture is axially hollowed out along yin, yang rotor cylindrical helix by the layout angle according to axial air-breathing aperture and constitutes;
Described cylinder block bottom is provided with the exhaust passage; Be provided with the rod radial air vent mouth that connects with the exhaust passage in cylinder block lower inner near said exhausting end base; Described rod radial air vent mouth is made up of hollowing out along yin, yang rotor cylindrical helix of offering according to the exhaust angle.
2. a kind of new screw expansion motive power machine according to claim 1 is characterized in that, the angular dimension of described axial air-breathing aperture, radial suction aperture and rod radial air vent mouth all requires to set according to actual working conditions and preset expansion ratio.
3. a kind of new screw expansion motive power machine according to claim 2; It is characterized in that; Between cog volume when the angle that described axial air-breathing aperture and radial suction aperture are provided with is air-breathing the end is the position of volume and the product of the inverse of interior volume specific ratio between maximum tooth, the position that rotor belonged to when the angle of described vent ports setting reached volume between maximum tooth for the between cog volume.
4. a kind of new screw expansion motive power machine according to claim 1 is characterized in that, described male rotor and female rotor are by loading ability of bearing, and described bearing adopts sliding bearing.
5. a kind of new screw expansion motive power machine according to claim 4 is characterized in that, also comprises the axle envelope that is used to isolate, and is arranged between described bearing and the cylinder block cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105860082A CN102003214B (en) | 2010-12-14 | 2010-12-14 | Novel screw expanding power machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105860082A CN102003214B (en) | 2010-12-14 | 2010-12-14 | Novel screw expanding power machine |
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| Publication Number | Publication Date |
|---|---|
| CN102003214A CN102003214A (en) | 2011-04-06 |
| CN102003214B true CN102003214B (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105860082A Expired - Fee Related CN102003214B (en) | 2010-12-14 | 2010-12-14 | Novel screw expanding power machine |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619566A (en) * | 2012-04-24 | 2012-08-01 | 上海齐耀膨胀机有限公司 | Main machine of screw expander |
| CN104879271A (en) * | 2015-04-20 | 2015-09-02 | 江苏大学 | Double-screw high-pressure surplus energy recycling device |
| CN110333145B (en) * | 2019-07-15 | 2022-04-01 | 苏州热工研究院有限公司 | High-temperature bulging test device and method for miniature sample |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2400575Y (en) * | 1999-12-16 | 2000-10-11 | 天津市石化通用机械研究所 | Screw expansion machine |
| CN101418796A (en) * | 2007-10-22 | 2009-04-29 | 株式会社神户制钢所 | Screw fluid machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6290480B1 (en) * | 1999-12-20 | 2001-09-18 | Carrier Corporation | Screw machine |
| GB0210018D0 (en) * | 2002-05-01 | 2002-06-12 | Univ City | Plural-screw machines |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2400575Y (en) * | 1999-12-16 | 2000-10-11 | 天津市石化通用机械研究所 | Screw expansion machine |
| CN101418796A (en) * | 2007-10-22 | 2009-04-29 | 株式会社神户制钢所 | Screw fluid machine |
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| CN102003214A (en) | 2011-04-06 |
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Granted publication date: 20120725 Termination date: 20211214 |