EP1869322A1 - Compresseur autolubrifiant avec protection contre la poussiere - Google Patents
Compresseur autolubrifiant avec protection contre la poussiereInfo
- Publication number
- EP1869322A1 EP1869322A1 EP05714646A EP05714646A EP1869322A1 EP 1869322 A1 EP1869322 A1 EP 1869322A1 EP 05714646 A EP05714646 A EP 05714646A EP 05714646 A EP05714646 A EP 05714646A EP 1869322 A1 EP1869322 A1 EP 1869322A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- dust
- compressor
- stage
- control enclosure
- 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.)
- Granted
Links
- 239000000428 dust Substances 0.000 title claims abstract description 53
- 230000004888 barrier function Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 8
- 230000035515 penetration Effects 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 39
- 238000007906 compression Methods 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 230000006835 compression Effects 0.000 description 7
- 239000003345 natural gas Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B25/00—Multi-stage pumps
- F04B25/005—Multi-stage pumps with two cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B25/00—Multi-stage pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
- F04B39/0022—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons piston rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
- F04B53/146—Piston-rod guiding arrangements
Definitions
- This invention relates to an oil-less compressor that delivers high-pressure gas to a storage reservoir.
- it relates to a home refuelling appliance for refuelling motor vehicles that operate on gaseous fuels.
- natural gas fuelled motor vehicles may require an oil-less compressor to compress gas for delivery to a tank or reservoir carried by the vehicle. This is one, preferred, example of an application of the present invention.
- the invention relates to an oil-less compressor, and particularly to a multi-stage compressor for refuelling gas-powered vehicles. Accordingly, the invention in one aspect addresses a gas compressor assembly which comprise [007] a) a gas compressor having at least a first stage with at least one cylinder with dry seals having a piston mounted therein with a piston rod connected to the piston and extending into a crank case cavity;
- said compressor assembly further comprising a dust control enclosure having a sidewall through which the piston rod passes, said dust control enclosure forming a barrier between the dry seals and the crank mechanism that substantially limits dust from the dry seals accessing the crank mechanism.
- the dust control enclosure is preferably in the form of a sleeve which when fitted forms a cap with penetrations through its sidewalls which have dust-excluding seals through which the rod(s) pass.
- Such seals are preferably in the form of washer-like rings made of felt-like material. This arrangement effectively confines dust generated by deterioration of the sealing rings to remain on the piston and cylinder sides of the dust control enclosure.
- the low pressure gas supply inlet delivers gas to the crank case cavity, and the first stage of the compressor takes its intake of gas to be compressed from the crank case cavity on the piston side of the dust control enclosure.
- the compressor unit of the invention in a preferred variant is a multi-stage compressor, e.g. a four stage compressor having pairs of opposed, linearly reciprocating, pistons.
- the pistons are preferably driven in pairs by Scotch yokes as a specific type of crank mechanism, actuated by a shaft extending from the crank case cavity to a motor.
- the piston rods move in a straight line.
- the dust control enclosure is installed within the crank case portion of the compressor.
- This enclosure preferably made of substantially rigid polymeric plastic material, may be in the form of a sleeve which, when mounted on the bearing housing flange, forms a cap or cup that surrounds the crank mechanism.
- This cap has sidewalls through which the piston rods pass as they extend inwardly to connect to the Scotch yokes. It is at these penetrations through the sidewalls of this enclosure that dust-excluding seals in the form of washers made of felt-like material are preferably installed.
- Figure 1 is a pictorial representation of a gaseous fuel motor vehicle parked in a garage having a home refuelling appliance according to the invention mounted on its inner wall.
- Figure 2 is a schematic depiction of the principal components of the appliance with the front shroud/cover of the housing removed, including the unitary motor/compressor assembly, its casing, control circuits, other support elements including various sensors.
- Figure 3 is a cross-sectional side view of the appliance of Figures 1 and 2 exposing the compressor and motor assembly and showing the location of the dust control enclosure in cross-section in relation to the first and third stage cylinders in the compressor.
- Figure 4 is an enlarged view of Figure 3 showing the compressor in detail.
- Figure 5 is perspective view depicting the dust control enclosure with holes to allow penetration by piston rods within the motor/compressor assembly of Figure 3.
- Figure 6 is a top view of the enclosure of Figure 5.
- Figure 7 is a cross-sectional side view of the enclosure of Figure 6.
- FIG. 1 the home refueling appliance 1 is shown mounted on a garage wall with the high-pressure discharge hose 2 connected to a car, the inlet hose 3 connected to a source of gas, and the electrical cord 4 plugged into a standard household receptacle.
- the compressor unit of the invention in a preferred variant is a multi-stage compressor 5, e.g. a four stage compressor 5 having pairs of opposed, linearly reciprocating, pistons 50, shown in Figures .
- the pistons 50 are preferably driven in pairs by Scotch yokes 51 actuated by a drive/crank shaft 52 extending from the motor 27 into the crank case cavity 14.
- the compressor unit is provided with a low-pressure gas supply inlet 59 for connection to a source of gas and a high-pressure gas discharge outlet 70 for delivery of compressed gas to an external reservoir.
- Figure 3 schematically depicts the unit operating in compression mode.
- Gas 6 which has been fed into the interior crank case volume 14 of the casing 26 is drawn into the first 28 of a series of four compression stages of compressor 5.
- the gas 6, which typically has a pressure of between about 0.2 and 0.5 psi, is drawn into the interior casing volume 14 by the suction created by the first compression stage 28.
- the gas 6 On leaving the first stage 28, the gas 6 passes through a desiccant bed 7 contained within an absorption chamber 29. Upon exiting the absorption chamber 29, the dried gas continues into the condenser 30 which is, at this stage, passive. Exiting the condenser 30, the gas 6 proceeds to the next, second stage 32 of the compressor 5 for completion of the compression process.
- the compressor 5, motor 27 and motor control circuitry 45 are all located within the casing 26, (counting the compressor block as part of the casing).
- the main logic controller 46 fed power from a power supply, is able to activate the motor 27, and govern its speed in the variable speed version, through motor control circuitry 45.
- the wall of the casing 26 acts as heat sink for the heat produced by the motor controller circuitry 45 and as a shield against outgoing electromagnetic emissions.
- On start-up low motor speeds are adopted to reduce otherwise high start-up current drains on the electrical supply system. This enables the unit to operate off of a standard household voltage, e.g. 110-120 volt, moderately fused electrical supply system.
- the initial process of compression can be effected with a high motor speed.
- motor speed is reduced in order to moderate ring wear and limit power consumption. This procedure is especially suited to oil-less compressors 5 as the wear rate of the sealing rings 53 within the compressor cylinders 54 of such units increases when the compressor system is operated at high speed against a high-back pressure.
- the speed of the electric motor 27 may be controlled to avoid natural resonant frequencies arising from its mechanical components that would otherwise increase the noise and vibration generated by the unit,
- the pistons 50 mounted in their respective cylinders 54 are each provided with dry seals 53.
- the pistons 50 are connected each by a piston rod 57 to the Scotch yoke crank mechanism 51 located in the crank case cavity 14.
- Thepistonrods 50 pass through the sidewall 55 of the dust control enclosure 56 which forms a barrier between the dry seals 53 on the pistons 50 and the crank mechanism 51, excluding dust from the dry- seals 53 accessing the crank mechanism 51.
- the dust control enclosure 56 as shown in Figures 5, 6, and 7 is in the form of a sleeve fitted to the bearings support 58, shown in Figures 3 and 4, to form a cap installed within the crank case portion 14 of the compressor 5.
- This enclosure 56 is provided with penetrations 60 through its sidewalls 55 which have dust-excluding dust seals 71.
- the rods 57 pass through these dust seals 71 as they extend inwardly to connect to the crank mechanism 51.
- Such dust seals 71 are preferably in the form of washers made of felt-like material that are compatible with the compressor environment.
- the dust control enclosure 56 is preferably made of semi-rigid polymeric plastic material with similar compatibility.
- the dust control enclosure 56 as shown is mounted on the bearing housing flange.
- the low-pressure gas supply inlet 59 delivers gas 6 to the crank case cavity 14 where the Scotch yoke mechanism 51 is present.
- the first stage 28 of the compressor 5 takes its intake of gas 6 to be compressed from the crank case cavity 14 on the piston side of the dust control enclosure 56 through first cylinder supply valve 72 fitted within the piston 50. Because gas 6 enters the first stage 28 of the compressor 5 by flowing first through the crank case cavity 14 within the region of the dust control enclosure and then through a partially constricted passageway 80 linking both sides of the dust control enclosure, and because the first stage 28 takes its intake of gas 6 to be compressed from the region outside the dust control enclosure 56, a pressure differential generally exists within the compressor unit between these two regions.
- the cool and dust-free arriving gas flow coming from the low-pressure gas supply inlet 59 passes first around the crank mechanism 51 components in the crank case volume 14 contained by the dust enclosure to provide cooling. This is advantageous as the Scotch Yoke drives generate significant heat due to bearing fiiction.
- the dust enclosure 56 minimizes the presence of dust in the crank case cavity by reason of the barrier that it provides and the general pressure differential that is maintained.
- the Scotch yoke mechanism 51 is able to serve two opposed cylinders located in a common plane, When four cylinders are employed, the second pair of cylinders is in a second plane.
Abstract
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL05714646T PL1869322T3 (pl) | 2005-03-17 | 2005-03-18 | Bezolejowa sprężarka z przeciwpyłowym uszczelnieniem |
SI200531673T SI1869322T1 (sl) | 2005-03-17 | 2005-03-18 | Brezoljni kompresor s protipraĺ no zaĺ äśito |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2005000395 | 2005-03-17 | ||
PCT/CA2005/000408 WO2006096957A1 (fr) | 2005-03-17 | 2005-03-18 | Compresseur autolubrifiant avec protection contre la poussiere |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1869322A1 true EP1869322A1 (fr) | 2007-12-26 |
EP1869322A4 EP1869322A4 (fr) | 2009-11-11 |
EP1869322B1 EP1869322B1 (fr) | 2012-11-28 |
Family
ID=36991225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05714646A Not-in-force EP1869322B1 (fr) | 2005-03-17 | 2005-03-18 | Compresseur autolubrifiant avec protection contre la poussiere |
Country Status (7)
Country | Link |
---|---|
US (1) | US20090214361A1 (fr) |
EP (1) | EP1869322B1 (fr) |
JP (1) | JP4856165B2 (fr) |
ES (1) | ES2399894T3 (fr) |
PL (1) | PL1869322T3 (fr) |
SI (1) | SI1869322T1 (fr) |
WO (1) | WO2006096957A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9856866B2 (en) | 2011-01-28 | 2018-01-02 | Wabtec Holding Corp. | Oil-free air compressor for rail vehicles |
US9388801B2 (en) | 2013-03-29 | 2016-07-12 | Douglas Rietkerk | Natural gas compressor with scissor drive assembly |
CN112196768A (zh) * | 2020-11-10 | 2021-01-08 | 士商(上海)机械有限公司 | 空压机 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3204864A (en) * | 1963-06-03 | 1965-09-07 | Malaker Lab Inc | Compensating-pressure piston and cylinders for gas compressors and expanders |
AU6808381A (en) * | 1975-12-24 | 1981-06-25 | Commonwealth Scientific And Industrial Research Organisation | Two-component piston ring |
EP0340150A1 (fr) * | 1988-04-27 | 1989-11-02 | Digital Equipment Corporation | Compresseur à vilebrequin rotatif |
US4889039A (en) * | 1988-10-17 | 1989-12-26 | Miller Bernard F | Gas compressor with labyrinth sealing and active magnetic bearings |
EP0833054A2 (fr) * | 1996-09-26 | 1998-04-01 | Teikoku Piston Ring Co., LTd. | Compresseur |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH678881A5 (fr) * | 1989-03-23 | 1991-11-15 | Sulzer Ag | |
US5957667A (en) * | 1997-05-23 | 1999-09-28 | Ballard Generation Systems Inc. | Oilless compressor with a pressurizable crankcase and motor containment vessel |
GB2400891A (en) * | 2003-04-23 | 2004-10-27 | Boc Group Plc | Dry pump oil sump and lubricant conduits |
US20060045768A1 (en) * | 2004-08-24 | 2006-03-02 | Fei-Tyh Chuang | Oil-less air compressor |
DE102006042021A1 (de) * | 2006-09-07 | 2008-03-27 | BSH Bosch und Siemens Hausgeräte GmbH | Verdichter mit gasdruckgelagertem Kolben |
-
2005
- 2005-03-18 PL PL05714646T patent/PL1869322T3/pl unknown
- 2005-03-18 US US11/908,718 patent/US20090214361A1/en not_active Abandoned
- 2005-03-18 WO PCT/CA2005/000408 patent/WO2006096957A1/fr active Application Filing
- 2005-03-18 JP JP2008501119A patent/JP4856165B2/ja not_active Expired - Fee Related
- 2005-03-18 SI SI200531673T patent/SI1869322T1/sl unknown
- 2005-03-18 ES ES05714646T patent/ES2399894T3/es active Active
- 2005-03-18 EP EP05714646A patent/EP1869322B1/fr not_active Not-in-force
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3204864A (en) * | 1963-06-03 | 1965-09-07 | Malaker Lab Inc | Compensating-pressure piston and cylinders for gas compressors and expanders |
AU6808381A (en) * | 1975-12-24 | 1981-06-25 | Commonwealth Scientific And Industrial Research Organisation | Two-component piston ring |
EP0340150A1 (fr) * | 1988-04-27 | 1989-11-02 | Digital Equipment Corporation | Compresseur à vilebrequin rotatif |
US4889039A (en) * | 1988-10-17 | 1989-12-26 | Miller Bernard F | Gas compressor with labyrinth sealing and active magnetic bearings |
EP0833054A2 (fr) * | 1996-09-26 | 1998-04-01 | Teikoku Piston Ring Co., LTd. | Compresseur |
Non-Patent Citations (1)
Title |
---|
See also references of WO2006096957A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1869322A4 (fr) | 2009-11-11 |
PL1869322T3 (pl) | 2013-05-31 |
EP1869322B1 (fr) | 2012-11-28 |
ES2399894T3 (es) | 2013-04-04 |
SI1869322T1 (sl) | 2013-04-30 |
US20090214361A1 (en) | 2009-08-27 |
JP4856165B2 (ja) | 2012-01-18 |
JP2008533365A (ja) | 2008-08-21 |
WO2006096957A1 (fr) | 2006-09-21 |
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