WO2013005888A1 - 무급유식 천연가스 압축장치 - Google Patents
무급유식 천연가스 압축장치 Download PDFInfo
- Publication number
- WO2013005888A1 WO2013005888A1 PCT/KR2011/007445 KR2011007445W WO2013005888A1 WO 2013005888 A1 WO2013005888 A1 WO 2013005888A1 KR 2011007445 W KR2011007445 W KR 2011007445W WO 2013005888 A1 WO2013005888 A1 WO 2013005888A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cylinder
- oil
- natural gas
- crankcase
- compressor
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Definitions
- the present invention relates to an oil-free natural gas compressor, and more particularly, it is not necessary to supply oil into a cylinder for the cylinder lubrication of the natural gas compressor, and extends its life so that it can be operated for a long time. It relates to an environmentally friendly oil-free natural gas compression device that is made easy.
- a natural gas compressor In general, a natural gas compressor (CNG Compressor) is to compress the natural gas at high pressure to be used as a fuel of the vehicle, the natural gas is compressed to a high pressure, which is because the natural gas (CNG) is composed of hydrocarbon compounds Because of the disadvantage of not liquefied, it is compressed to high pressure and stored in a high pressure container.
- CNG Compressor natural gas compressor
- the natural gas compressor is required for high precision and advanced technology to compress natural gas up to 250 barG.
- the cylinder for compressing the gas at high pressure has a lubricant, mineral oil ( Hereinafter referred to as 'oil' to supply lubrication.
- 'oil' to supply lubrication.
- the compression device capable of charging 100 buses per day is about 1,100 Nm3 / Hr, and the oil supplied when one compressor is operated consumes about 6.4 drums of oil per year for 12 hours of operation.
- 6.4 drums of oil was supplied to the compressors per year, but most of the gas flowed into the gas storage tanks of vehicles, because they could not be discharged and recovered through various auxiliary equipment and drain valves.
- the viscosity of the oil at the operating temperature inside the compression chamber of the cylinder is diluted with water, so the water vapor is saturated with the compressed gas, and when the gas flows, it is continuously transferred to the discharge line with the oil. Oil flows into the vehicle's storage vessel and reaches the engine.
- the prior art document related to the oil-fueled compression apparatus described in the 'Gas supply device of the compressed natural gas vehicle' or the Korean Patent Publication No. 10-2000-0055660 (published on September 15, 2000) 10-2001-0017007 (published on March 5, 2001) discloses a fuel filtering apparatus and method for a compressed natural gas vehicle, and the like, and is already known, and a detailed description thereof will be omitted.
- the lubricated natural gas compressor (Lubricated CNG compressor) is city gas 4.0 ⁇ 5.0kg / cm2G. The gas can be sucked up to 250kg / cm2G.
- the oil-loaded compressor includes the second and third packings from the cylinder of the first stage to the cylinder of the fourth stage on the basis of one vehicle, and the daily oil consumption is 3.5 liters (L) after 12 hours of operation. 1,277.5 liters (about 6.4 drums) of oil is supplied, and compared with the nationwide vehicles, the consumption is not only enormous, but also uneconomical, causing serious environmental pollution. Therefore, about 168 domestic natural gas filling stations are operating, and considering that two or three compression units are provided for each filling station, about 2,944 drums of oil are consumed annually.
- the oil supplied to the compressor has a hassle to periodically discharge the oil accumulated in the bottom of the oil separator or the storage container using the drain valve.
- the oil is introduced into the cylinder of the compression apparatus and the temperature of the cylinder rises to 110 to 160 degrees Celsius, its characteristics are changed and it cannot be reused.
- an oil separator for preventing pulsation and removing oil is provided at the suction front end of each stage in order to remove the oil supplied to the cylinder of each stage of the compressor, but there are no fundamental measures to block the oil flowing along the discharge line in the vapor state. In order to minimize this, it is legally mandatory to install a filter between the cylinder of the third stage and the cylinder of the fourth stage, that is, after the final stage of the fourth stage cylinder, or even to the front end of the dispenser. There is a situation.
- domestic city gas is supplied in the form of dry gas by refining crude oil, and when mixed with oil is naturally changed to moist gas, this problem occurs in the lubricator. 250 barG.
- the gas nozzle is clogged by gas expansion to the nozzle part mounted on the vehicle, causing the gasoline nozzle to become clogged and refueling. Due to the characteristics of the oil, the low fluidity of the paraffinic series is -17 degrees Celsius. Naphthenic oils will begin to replace oils below -30 degrees Celsius.
- the differential pressure of the lubricator nozzle part may occur up to 220 ⁇ 170barG. At the initial charge, and this may cause the temperature to drop to -110 ° C.
- the nozzle of the lubricator may become clogged and the main factor is dry gas. It is not oil. That is, if only dry gas is present, natural gas is composed of hydrocarbon compounds, so it cannot cause any change of state at -110 ° C. However, if excessive oil or water is present, the oil nozzle can be blocked by freezing. .
- the compression type of the piston is applied to the oil-compressing device using a high-engineering plastic material instead of cast iron, and the compression ratio is slightly higher than the compression in the fourth stage. In order to improve the volumetric efficiency due to this high pressure, oil is also supplied.
- the cylinder of the compression device is somewhat different depending on the model and specification, it is difficult to disassemble the cylinder because the weight is about 500 ⁇ 700kg and it is very heavy and the cooler is installed on the upper part of the cylinder to minimize the volume of the device. .
- Patent Document 1 Domestic Publication No. 10-2000-0055660 (published on September 15, 2000)
- Patent Document 2 2. Domestic Publication No. 10-2001-0017007 (2001.03.05. Publication)
- An object of the present invention is to minimize friction and supply oil by providing a highly precise metal liner between the cylinder and the piston of the natural gas compressor, and to disassemble the cylinder by having a cylinder support means on the outside of the crankcase.
- An object of the present invention is to provide an oil-free natural gas compressor that is easy to assemble. That is, in order to disassemble and replace the grand packing, the side cylinder of the crankcase must be separated, and there are many difficulties and risk factors when disassembling the cylinder, and the purpose is to prevent the occurrence of safety accidents.
- the cylinder has a rockwell hardness test (HRC) of surface strength at the contact surface of the inner piston.
- HRC rockwell hardness test
- the cylinder is provided horizontally on one side of the cylinder and the cylinder support means for supporting the weight when disassembling / assembling is provided.
- the cylinder support means coupled to the upper end of the crankcase horizontal bar is installed side by side in the axial direction on the top of the cylinder;
- the cylinder support means is characterized in that the height adjusting opening is provided to match the center of the cylinder with the crankcase on the pillar.
- FIG. 1 is a front view showing an oil-free natural gas compression apparatus according to a preferred embodiment of the present invention.
- Figure 2 is a plan view of the oil-free natural gas compression device according to the present invention.
- Figure 3 is a partial cross-sectional view of the natural gas compression device according to the present invention.
- FIG. 4 is an internal cross-sectional view showing a decomposition state of the natural gas compression device of the present invention.
- crankcase 12 body 14: piston
- Base frame 20 1st cylinder 22
- 32 Cylinder block
- the present invention in the oil-free natural gas compression device that is to compress the natural gas in multiple stages by the cylinder (20,30) assembled on the side of the crankcase 10, the cylinder (20,30) ) Is characterized in that the contact surface of the inner piston (26, 28, 36, 38) is provided with a metal liner (27, 29, 37, 39) having a surface strength of more than Rockwell hardness test (HRC) 70.
- HRC Rockwell hardness test
- the present invention is characterized in that the cylinder support means 40 for horizontally provided on one side of the cylinder (20,30) for supporting the weight when disassembling / assembling the cylinder (20,30).
- the oil-free natural gas compressor 100 of the present invention is for supplying compressed natural gas at high pressure, and compresses the compressed gas at least once or more, in multiple stages, and on one side or both sides of the crankcase 10.
- the first cylinder 20 and the second cylinder 30 are assembled to the side surfaces, and the main body 12 of the crankcase 10 is fixed to the base frame 18 seated on the base 19.
- crankcase 10 is installed in the main body 12 and the piston 14 to which the crank rod is connected to operate the first and second cylinders 20 and 30 while reciprocating.
- the first and second cylinders 20 and 30 compress and supply the gas (natural gas) introduced to the intake side by a piston and repeatedly discharge the gas to the exhaust side.
- cylinder blocks 22 and 32 are provided on the side of the crankcase in the axial center direction and are assembled by bolts, and the first to fourth pistons 26, 28, 36 and 38 of the cylinder blocks are connected.
- the first piston rod 24 and the second piston rod 34 are connected to the piston 14 of the crankcase.
- first and second grand packings 25 and 35 for preventing leakage are provided at the connection portion between the crankcase and the cylinder, and the piston rod penetrates the sliding contact.
- the cylinder 20, 30 of the present invention is provided with a metal liner (27, 29, 37, 39) between the inner piston (26, 28, 36, 38). That is, the oil-free natural gas compressor of the present invention is provided with a high-strength metal liner (27, 29, 37, 39) in the cylinder instead of the oil is not supplied to the cylinder, the oil is not mixed in the natural gas and piston Its operation is smooth and the life of the device is extended.
- the first to fourth metal liners 27, 29, 37, and 39 are made of a metallic material having a high strength, abrasion resistance, corrosion resistance, and a low coefficient of friction. Particularly, the inner surface of the liner is heat treated to provide a rockwell hardness test.
- the metal liner is preferably composed of a nickel alloy, chromium alloy, aluminum alloy, and the like, and may be selectively formed on the surface of the liner by using an alloy of the above material on the surface of the liner to form a coating layer.
- the oil-free natural gas compressor 100 of the present invention is not supplied with oil to the cylinders 20 and 30, but the first and second void provided on the piston rods 24 and 34 on the crankcase 10.
- the oil supplied to the grand packing is adsorbed to the piston rods 24 and 34, and an oil film is formed between the piston rod and the grand packing to maintain airtightness. When compressed, it blocks the gas inside the cylinder to prevent leakage into the crankcase.
- a very small amount of oil is introduced into the cylinder between the piston rod and the grand packing, and the amount of oil introduced into the cylinder is extremely low below 5PPM, and mixed with gas, so that the entire amount of saturated steam is not liquid. It does not act as a factor in overloading or malfunctioning the engine.
- the cylinder support means 40 is coupled to the upper fixture 45 of the crankcase 10 and the horizontal bar 42 which is installed side by side in the axial direction on the top of the cylinder (20, 30) and ;
- Attached to the upper end of the cylinder (20,30) is characterized in that consisting of a bracket 46 in sliding contact along the horizontal bar (42). That is, the cylinder support means 40 is for supporting the weight of the cylinder and parts in the axial direction when disassembling / assembling the cylinder, and horizontal bars 42 horizontally on the upper portions of the first and second cylinders 20 and 30.
- the horizontal bar 42 has one end coupled to the upper fixture 45 of one side of the main body and the column is coupled to the other end.
- the pillar 43 is erected in a ' ⁇ ' shape is configured so that the horizontal bar is connected in the middle and the cylinder passes through the inner space.
- the bracket 46 is integrally formed at both sides of the upper ends of the cylinder blocks 22 and 32, or preferably assembled by screws to facilitate removal / attachment to the cylinder block, which is an eye bolt or hook having a ring shape. Hook blots and the like are most preferred.
- the stopper 48 for fixing the position in the disassembled state of the cylinder (20, 30) is provided. That is, it is possible to adjust the height of the height of the column 43 and the horizontal bar 42 with the height adjusting holes 44 assembled with screws on the bottom of the column 43, the cylinder and the piston rod, the piston, and the grand packing It is possible to precisely and easily disassemble / assemble the back.
- the fastener 45 is preferably assembled by connecting means such as a horizontal bar and the hinge or pin so that the column can be elevated.
- the stopper 48 is assembled with screws on the side of the pillar and provided horizontally, while fixing the position of the cylinder while contacting the side of the cylinder, forming a female screw on the side of the cylinder and fixing the other end of the stopper by screws. desirable. Or it may be provided with a separate fixing means including a fixing pin or bolt for fixing the position of the bracket.
- reference numeral '16' is a general oil supply machine for supplying lubricating oil inside the body of the crankcase
- reference numeral '33' is a head cover of the cylinder block.
- the present invention does not supply oil to the cylinder of the natural gas compression device, only natural gas can obtain compressed fuel, and can improve the engine performance of the vehicle and reduce fuel efficiency. And since no oil is supplied, it can extend the replacement cycle of filter element more than 4 times and extend the lifespan, and it is economical effect that can greatly reduce the cost of oil supply and waste oil treatment, consumable replacement, and maintenance. Entails. In particular, it is very environmentally friendly by preventing the generation of harmful exhaust gases, environmental pollutants, and carbon caused by oil.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Compressor (AREA)
Abstract
Description
Claims (4)
- 크랭크케이스(10)의 측면에 조립된 실린더(20,30)에 의해 천연가스를 다단계에 걸쳐 압축하도록 된 무급유식 천연가스 압축장치에 있어서,상기 실린더(20,30)는 내측 피스톤(26,28,36,38)의 접촉면에 표면 강도가 로크웰경도시험(HRC)70이상인 금속 라이너(27,29,37,39)가 구비된 것을 특징으로 하는 무급유식 천연가스 압축장치.
- 제1항에 있어서,상기 실린더(20,30)의 일측에 수평으로 구비되고 상기 실린더(20,30)를 분해/조립시 무게를 지지하기 위한 실린더 지지수단(40)이 구비된 것을 특징으로 하는 무급유식 천연가스 압축장치.
- 제2항에 있어서 상기 실린더 지지수단(40)은,크랭크케이스(10)의 상단 고정구(45)에 결합하여 실린더(20,30)의 상부에 축 방향으로 나란하게 설치되는 가로바(42)와;상기 가로바(42)의 외측 끝단을 받치고 있는 기둥(43) 및;상기 실린더(20,30)의 상단에 부착하여 가로바(42)를 따라 미끄럼 접촉하는 브래킷(46)으로 구성됨을 특징으로 하는 무급유식 천연가스 압축장치.
- 제3항에 있어서 상기 실린더 지지수단(40)은,상기 기둥(43)에 실린더의 중심을 크랭크케이스(10)와 일치시키기 위한 높이조절구(44)와;상기 실린더(20,30)를 분해한 상태에서 위치를 고정하기 위한 스토퍼(48)가 구비된 것을 특징으로 하는 무급유식 천연가스 압축장치.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2012121966/06A RU2012121966A (ru) | 2011-07-06 | 2011-10-07 | Безмасляный компрессор природного газа |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2011-0066813 | 2011-07-06 | ||
KR1020110066813A KR101180145B1 (ko) | 2011-07-06 | 2011-07-06 | 무급유식 천연가스 압축장치 |
Publications (1)
Publication Number | Publication Date |
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WO2013005888A1 true WO2013005888A1 (ko) | 2013-01-10 |
Family
ID=47073868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/KR2011/007445 WO2013005888A1 (ko) | 2011-07-06 | 2011-10-07 | 무급유식 천연가스 압축장치 |
Country Status (3)
Country | Link |
---|---|
KR (1) | KR101180145B1 (ko) |
RU (1) | RU2012121966A (ko) |
WO (1) | WO2013005888A1 (ko) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101419298B1 (ko) | 2014-02-26 | 2014-07-17 | 하미테크 주식회사 | 무급유식 천연가스 압축기 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR0181706B1 (ko) * | 1995-10-10 | 1999-05-01 | 에다 데쓰야 | 회전형 압축기 |
KR20000008583U (ko) * | 1998-10-23 | 2000-05-15 | 이구택 | 공기 압축기용 로터의 클리닝 및 래버린스 패킹 교환장치 |
KR20060037317A (ko) * | 1999-09-14 | 2006-05-03 | 산요덴키가부시키가이샤 | 압축장치 |
JP2009216527A (ja) * | 2008-03-11 | 2009-09-24 | Ihi Corp | 回転機械支持装置 |
-
2011
- 2011-07-06 KR KR1020110066813A patent/KR101180145B1/ko active IP Right Review Request
- 2011-10-07 WO PCT/KR2011/007445 patent/WO2013005888A1/ko active Application Filing
- 2011-10-07 RU RU2012121966/06A patent/RU2012121966A/ru not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR0181706B1 (ko) * | 1995-10-10 | 1999-05-01 | 에다 데쓰야 | 회전형 압축기 |
KR20000008583U (ko) * | 1998-10-23 | 2000-05-15 | 이구택 | 공기 압축기용 로터의 클리닝 및 래버린스 패킹 교환장치 |
KR20060037317A (ko) * | 1999-09-14 | 2006-05-03 | 산요덴키가부시키가이샤 | 압축장치 |
JP2009216527A (ja) * | 2008-03-11 | 2009-09-24 | Ihi Corp | 回転機械支持装置 |
Also Published As
Publication number | Publication date |
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KR101180145B1 (ko) | 2012-09-05 |
RU2012121966A (ru) | 2013-12-10 |
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