CN108104879A - A kind of screw expander, helical-lobe compressor, the integrated system of motor - Google Patents

A kind of screw expander, helical-lobe compressor, the integrated system of motor Download PDF

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Publication number
CN108104879A
CN108104879A CN201810042109.XA CN201810042109A CN108104879A CN 108104879 A CN108104879 A CN 108104879A CN 201810042109 A CN201810042109 A CN 201810042109A CN 108104879 A CN108104879 A CN 108104879A
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CN
China
Prior art keywords
motor
compressor
screw
helical
oil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810042109.XA
Other languages
Chinese (zh)
Inventor
胡建军
张开闯
王静
陈锐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuxi Tin Compressor Co Ltd
Original Assignee
Wuxi Tin Compressor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuxi Tin Compressor Co Ltd filed Critical Wuxi Tin Compressor Co Ltd
Priority to CN201810042109.XA priority Critical patent/CN108104879A/en
Publication of CN108104879A publication Critical patent/CN108104879A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00Rotary-piston machines or engines
    • F01C1/08Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/12Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type
    • F01C1/14Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F01C1/16Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F01C1/165Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type having more than two rotary pistons with parallel axes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C13/00Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/06Heating; Cooling; Heat insulation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F04C18/165Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type having more than two rotary pistons with parallel axes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/02Pumps characterised by combination with or adaptation to specific driving engines or motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04Heating; Cooling; Heat insulation

Abstract

The present invention relates to the screw compressor systems with ORC,Specially a kind of screw expander,Helical-lobe compressor,The integrated system of motor,It simplifies expander system pipeline and compressor,Connection between motor expanding machine,Improve electric efficiency,It includes integrated shell,Exhaust end base of oil injection threaded bolt expanding machine and motor are provided in the integrated shell,The exhaust end base of oil injection threaded bolt expanding machine includes screw rotor,The screw rotor lower end is provided with fuel tank,Upper end is provided with oil eliminator,Expansion sender property outlet is offered on the integrated shell of the oil eliminator upper end,The screw rotor one side is provided with oil pump,Expansion working medium entrances are offered on the integrated shell,The screw rotor opposite side connects the motor one side,The motor opposite side connecting screw compressor,Cooling working medium entrances and cooling sender property outlet are offered on the integrated shell.

Description

A kind of screw expander, helical-lobe compressor, the integrated system of motor
Technical field
The present invention relates to the screw compressor systems with ORC, are specially a kind of screw expander, helical-lobe compressor, motor Integrated system.
Background technology
For the cooler of fuel injection helical lobe compressor based on air-cooled, workflow is as shown in Figure 1.Gas by filter, After intake valve, into helical-lobe compressor, compressor is in power(Generally motor)Driving under, by gas and lubricating oil(It is cold But agent)Mixing, and force be expelled to check valve, enter oil eliminator afterwards, in this course gas mixture pressure and Pressure is continuously improved, until rated value(Temperature is generally 85 DEG C or so).The gas separated passes through minimum pressure valve, enters Air cooling supplies client by separator afterwards.And the lubricating oil separated, under the action of system pressure difference, by thermostatic valve Distribution portion lubricating oil enters cooler cooling, is mixed afterwards with remaining deep fat(Temperature is generally at 55 DEG C or so after mixing), By filter, oil cut-off valve, into compressor, it is again introduced into working cycles.
And the cooler of oil free screw compressor, based on water cooling, workflow is as shown in Figure 2.Gas is by filtering After device, intake valve, into level-one helical-lobe compressor, compressor is in power(Generally motor)Driving under, constantly promote gas The pressure and temperature of body, until reaching rated value(Temperature is generally 150 DEG C or so), then high-temperature gas is by intercooler Cooling(Temperature is typically reduced to 55 DEG C or so), and removed water by separator, two level helical-lobe compressor is subsequently entered, is pressed again Contracting, pressure and temperature get a promotion again(Temperature is generally 150 DEG C or so), high-temperature gas is afterwards by Gas Cooler cooling (Temperature is typically reduced to 40 DEG C or so), separator water removal, be finally fed client.Driving cog is used in oil free screw compressor Wheel, the lubricating oil of bearing lubrication, general individually cooling.
ORC(It abridges for Organic Rankine Cycle, commonly referred to as Organic Rankine Cycle or organic rankine cycle) System as shown in Figure 3, Figure 4, is formed including screw expander, condenser, working medium pump, preheater, evaporator, superheater, had Machine working medium is according to 1 high temperature and pressure overheated gas, 2 low temperature low pressure gas, 3 low-temp low-pressure saturated gases, 4 low-temp low-pressure saturated solutions Body, 5 low-temp low-pressure subcooled liquids, 6 cryogenic high pressure subcooled liquids, 7 high temperature and pressure saturated liquids, 8 high temperature and pressure saturated gases Cycle operation in proper order, wherein 1 to 2 realize in screw expander, 2 to 3,3 to 4 and 4 to 5 realize within the condenser, 5 to 6 It is realized in working medium pump, 6 to 7 realize in preheater, and 7 to 8 realize in evaporator, and 8 to 1 realizes in the superheater.
Screw compressor system with ORC, it can be understood as the synthesis of ORC system and compressor assembly.Attached drawing 5 is single Grade fuel injection helical lobe compressor ORC thermal energy recovery schemes, scheme is by fuel injection helical lobe compressor system and working substance steam generating system structure Into.Wherein fuel injection helical lobe compressor system mainly by air intake filter, intake valve, helical-lobe compressor, check valve, oil, moisture, Oil strainer, motor, screw expander are formed.Working substance steam generating system is mainly by condenser, working medium tank, filter, working medium Pump, working medium flow regulating valve, drier, preheater, evaporator, superheater, pressure sensor, temperature sensor are formed.Two System is connected by pipeline.
Since helical-lobe compressor and screw expander are required for realizing driving by motor, typically screw compression at present Machine and screw expander are provided separately, and cause Integral connection structure complicated, electric efficiency is not high.
The content of the invention
To solve the above-mentioned problems, the present invention provides a kind of screw expander, helical-lobe compressor, motor integrated system System simplifies the connection between expander system pipeline and compressor, motor expanding machine, improves electric efficiency.
Its technical solution is such:A kind of screw expander, helical-lobe compressor, the integrated system of motor, feature exist In including integrated shell, exhaust end base of oil injection threaded bolt expanding machine and motor being provided in the integrated shell, the exhaust end base of oil injection threaded bolt is swollen Swollen machine includes screw rotor, and the screw rotor lower end is provided with fuel tank, upper end is provided with oil eliminator, on the oil eliminator Expansion sender property outlet is offered on the integrated shell at end, the screw rotor one side is provided with oil pump, the integration Expansion working medium entrances are offered on housing, the screw rotor opposite side connects the motor one side, and the motor opposite side connects Helical-lobe compressor is connect, cooling working medium entrances and cooling sender property outlet are offered on the integrated shell.
It is further characterized by, and the compressor is installed in the integrated shell;
The compressor passes through compressor described in shaft coupling;
Guiding valve is additionally provided in the fuel injection helical lobe compressor, the guiding valve is arranged at the screw rotor upper end, the guiding valve One end connects drive cylinder.
After adopting the structure of the invention, it is exhaust end base of oil injection threaded bolt expanding machine and motor is integrated, and oil piping system is integrated with, Structure is simplified, and can be realized the cooling of motor by cooling down working medium entrances and cooling down sender property outlet, be improved the effect of motor Rate.
Description of the drawings
Fig. 1 is cooled oil-injected screw air compressor operating principle schematic;
Fig. 2 is water-cooled oil-free helical-lobe compressor operation principle schematic diagram;
Fig. 3 is ORC system working medium work TS cycle figures;
Fig. 4 is ORC system working medium fundamental diagram;
Fig. 5 is single-stage fuel injection helical lobe compressor ORC thermal energy recovery scheme schematic diagrames;
Fig. 6 is one schematic diagram of the embodiment of the present invention;
Fig. 7 is two schematic diagram of the embodiment of the present invention;
Fig. 8 is one schematic diagram of exhaust end base of oil injection threaded bolt expanding machine structure of the present invention;
Fig. 9 is two schematic diagram of exhaust end base of oil injection threaded bolt expanding machine structure of the present invention;
Figure 10 is Fig. 6 concrete structure schematic diagrams;
Figure 11 is Fig. 7 concrete structure schematic diagrams.
Specific embodiment
Exhaust end base of oil injection threaded bolt expanding machine structure is segmented into two kinds, is specifically shown in shown in Fig. 8 and Fig. 9.Exhaust end base of oil injection threaded bolt shown in Fig. 8 is swollen Swollen machine only includes oil eliminator 1, axle envelope 2, screw rotor 3, fuel tank 4, oil pump 5, housing 6 without guiding valve, shown in Fig. 9, including Oil eliminator 1, axle envelope 2, screw rotor 3, fuel tank 4, oil pump 5, housing 6, guiding valve 7 and drive cylinder 8.
Fuel injection helical lobe compressor operation principle shown in Fig. 8 is as described below:Expansion working medium by expand A mouthfuls of working medium entrances into Enter screw rotor 3, after expansion, arrange the fuel tank 4 into housing 6 together in company with parts of lubricating oil, lubricating oil is deposited in fuel tank 4, gaseous working medium and mist state lubricating oil then rise with air-flow, and when by oil eliminator 1, mist state lubricating oil is blocked, gas State working medium is then by expanding B mouthfuls of discharges of working medium entrances.Lubricating oil in fuel tank 4 is deposited in by oil pump 5, be transported to bearing and The place of 3 grade needs of screw rotor lubrication.At 3 power output shaft of screw rotor, axle envelope 2 is installed, prevents working medium and lubrication Oil is to outward leakage.In the case where 3 rotating speed of screw rotor is certain, volume flow that working medium enters expanding machine be immobilize it is dynamic 's.
Operation principle shown in Fig. 9 is identical with Fig. 8's, simply more guiding valves 7, certain in 3 rotating speed of screw rotor to realize In the case of, adjust the volume flow that working medium enters expanding machine.
The embodiment of the present invention one and embodiment two use expanding machine structure shown in Fig. 9 below.
See Fig. 6, shown in Figure 10, a kind of screw expander, helical-lobe compressor, the integrated system of motor, including integration Housing 9 has been sequentially arranged exhaust end base of oil injection threaded bolt expanding machine 10, motor 11 and compressor 12, exhaust end base of oil injection threaded bolt expanding machine in integrated shell 9 10 include screw rotor 3, and 3 lower end of screw rotor is provided with fuel tank 4, upper end is provided with oil eliminator 1,1 upper end of oil eliminator 9 offer expansion sender property outlet B on integrated shell, and 3 one side of screw rotor is provided with oil pump 5, offers on integrated shell 9 Expand working medium entrances A, 3 opposite side of screw rotor connection motor, 11 one side, 11 opposite side connecting screw compressor 12 of motor, one Change and cooling working medium entrances C and cooling sender property outlet D, compressed media entrance E, compressed media outlet F and profit are installed on housing 9 Lubricating oil entrance G.This structure is compacter, small.
See Fig. 7, shown in Figure 11, a kind of screw expander, helical-lobe compressor, the integrated system of motor, including integration Housing 9, exhaust end base of oil injection threaded bolt expanding machine 10, motor 11 are provided in integrated shell 9, and exhaust end base of oil injection threaded bolt expanding machine 10 includes screw rotor 3,3 lower end of screw rotor is provided with fuel tank 4, upper end is provided with oil eliminator 1, and 9 open on the integrated shell of 1 upper end of oil eliminator Equipped with expansion sender property outlet B, 3 one side of screw rotor is provided with oil pump 5, expansion working medium entrances A is offered on integrated shell 9, 3 opposite side of screw rotor connection motor, 11 one side, 11 opposite side of motor pass through 13 connecting screw compressor 12 of shaft coupling, integration Cooling working medium entrances C and cooling sender property outlet D are offered on housing 9, compressed media entrance is offered on the housing of compressor 12 E, compressed media outlet F and lubricating oil inlet G.This structure can be convenient to replace since compressor 12 is independently arranged It safeguards.

Claims (4)

1. the integrated system of a kind of screw expander, helical-lobe compressor, motor, which is characterized in that it includes integrated shell, institute It states and exhaust end base of oil injection threaded bolt expanding machine and motor is provided in integrated shell, the exhaust end base of oil injection threaded bolt expanding machine includes screw rotor, described Screw rotor lower end is provided with fuel tank, upper end is provided with oil eliminator, on the integrated shell of the oil eliminator upper end Offer expansion sender property outlet, the screw rotor one side is provided with oil pump, offers expansion working medium on the integrated shell Entrance, the screw rotor opposite side connect the motor one side, the motor opposite side connecting screw compressor, the one Change and cooling working medium entrances and cooling sender property outlet are offered on housing.
2. a kind of screw expander according to claim 1, helical-lobe compressor, the integrated system of motor, which is characterized in that The compressor is installed in the integrated shell.
3. a kind of screw expander according to claim 1, helical-lobe compressor, the integrated system of motor, which is characterized in that The compressor passes through compressor described in shaft coupling.
4. a kind of screw expander according to claim 1, helical-lobe compressor, the integrated system of motor, which is characterized in that Guiding valve is additionally provided in the fuel injection helical lobe compressor, the guiding valve is arranged at the screw rotor upper end, described guiding valve one end Connect drive cylinder.
CN201810042109.XA 2018-01-17 2018-01-17 A kind of screw expander, helical-lobe compressor, the integrated system of motor Pending CN108104879A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810042109.XA CN108104879A (en) 2018-01-17 2018-01-17 A kind of screw expander, helical-lobe compressor, the integrated system of motor

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Application Number Priority Date Filing Date Title
CN201810042109.XA CN108104879A (en) 2018-01-17 2018-01-17 A kind of screw expander, helical-lobe compressor, the integrated system of motor

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Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086072A (en) * 1976-01-29 1978-04-25 Dunham-Bush, Inc. Air source heat pump with multiple slide rotary screw compressor/expander
JPH0988501A (en) * 1995-09-22 1997-03-31 Hisaka Works Ltd Screw turbine and binary generating device therewith
CN1423356A (en) * 2002-12-30 2003-06-11 西安交通大学 Method for oil-free lubricating vortex compressor-decompressor system for fuel cell
CN101216038A (en) * 2007-01-05 2008-07-09 株式会社日立产机系统 Oilless screw compressor
CN101403383A (en) * 2007-10-02 2009-04-08 日立空调·家用电器株式会社 Screw compressor for refrigeration device
US20100090476A1 (en) * 2007-04-27 2010-04-15 Hirofumi Wada Fluid Machine, Rankine Circuit, and System for Utilizing Waste Heat from Vehicle
CN102061944A (en) * 2010-11-16 2011-05-18 上海维尔泰克螺杆机械有限公司 Screw expansion generating device
CN201891440U (en) * 2010-11-08 2011-07-06 上海维尔泰克螺杆机械有限公司 Screw expansion power generating device
CN102706022A (en) * 2010-10-13 2012-10-03 株式会社神户制钢所 Refrigerator
CN103195481A (en) * 2013-03-25 2013-07-10 上海维尔泰克螺杆机械有限公司 Screw expanding power generation device and organic Rankine cycle power generation system
CN104110272A (en) * 2013-04-16 2014-10-22 袁建华 Screw expander waste heat generator
CN105135724A (en) * 2015-08-21 2015-12-09 深圳智慧能源技术有限公司 Energy-saving refrigerating unit and compression expansion module
CN105221432A (en) * 2015-10-27 2016-01-06 无锡压缩机股份有限公司 There is the screw compressor system of organic Rankine bottoming cycle
CN205225742U (en) * 2015-10-27 2016-05-11 无锡压缩机股份有限公司 Helical -lobe compressor system with organic rankine cycle
CN105673103A (en) * 2016-04-01 2016-06-15 上海开山能源装备有限公司 Geothermal wellhead power station system based on ORC systems and power generation method of geothermal wellhead power station system
CN106801619A (en) * 2017-03-03 2017-06-06 上海维尔泰克螺杆机械有限公司 The adjustable screw expander of volumetric ratio
CN206290297U (en) * 2016-11-18 2017-06-30 袁建华 A kind of Organic Rankine Cycle TRT
CN206368813U (en) * 2016-12-30 2017-08-01 山西易通环能科技集团有限公司 A kind of energy-saving screw rod air compressor machine
CN206592292U (en) * 2017-02-27 2017-10-27 西安琦通新能源设备有限公司 A kind of waste-heat recovery device of screw air compressor
CN208831045U (en) * 2018-01-17 2019-05-07 无锡锡压压缩机有限公司 Screw expander, helical-lobe compressor, motor integrated system

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086072A (en) * 1976-01-29 1978-04-25 Dunham-Bush, Inc. Air source heat pump with multiple slide rotary screw compressor/expander
JPH0988501A (en) * 1995-09-22 1997-03-31 Hisaka Works Ltd Screw turbine and binary generating device therewith
CN1423356A (en) * 2002-12-30 2003-06-11 西安交通大学 Method for oil-free lubricating vortex compressor-decompressor system for fuel cell
CN101216038A (en) * 2007-01-05 2008-07-09 株式会社日立产机系统 Oilless screw compressor
US20100090476A1 (en) * 2007-04-27 2010-04-15 Hirofumi Wada Fluid Machine, Rankine Circuit, and System for Utilizing Waste Heat from Vehicle
CN101403383A (en) * 2007-10-02 2009-04-08 日立空调·家用电器株式会社 Screw compressor for refrigeration device
CN102706022A (en) * 2010-10-13 2012-10-03 株式会社神户制钢所 Refrigerator
CN201891440U (en) * 2010-11-08 2011-07-06 上海维尔泰克螺杆机械有限公司 Screw expansion power generating device
CN102061944A (en) * 2010-11-16 2011-05-18 上海维尔泰克螺杆机械有限公司 Screw expansion generating device
CN103195481A (en) * 2013-03-25 2013-07-10 上海维尔泰克螺杆机械有限公司 Screw expanding power generation device and organic Rankine cycle power generation system
CN104110272A (en) * 2013-04-16 2014-10-22 袁建华 Screw expander waste heat generator
CN105135724A (en) * 2015-08-21 2015-12-09 深圳智慧能源技术有限公司 Energy-saving refrigerating unit and compression expansion module
CN105221432A (en) * 2015-10-27 2016-01-06 无锡压缩机股份有限公司 There is the screw compressor system of organic Rankine bottoming cycle
CN205225742U (en) * 2015-10-27 2016-05-11 无锡压缩机股份有限公司 Helical -lobe compressor system with organic rankine cycle
CN105673103A (en) * 2016-04-01 2016-06-15 上海开山能源装备有限公司 Geothermal wellhead power station system based on ORC systems and power generation method of geothermal wellhead power station system
CN206290297U (en) * 2016-11-18 2017-06-30 袁建华 A kind of Organic Rankine Cycle TRT
CN206368813U (en) * 2016-12-30 2017-08-01 山西易通环能科技集团有限公司 A kind of energy-saving screw rod air compressor machine
CN206592292U (en) * 2017-02-27 2017-10-27 西安琦通新能源设备有限公司 A kind of waste-heat recovery device of screw air compressor
CN106801619A (en) * 2017-03-03 2017-06-06 上海维尔泰克螺杆机械有限公司 The adjustable screw expander of volumetric ratio
CN208831045U (en) * 2018-01-17 2019-05-07 无锡锡压压缩机有限公司 Screw expander, helical-lobe compressor, motor integrated system

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