EP2177758A1 - Mechanismus zur Umwandlung von Drehbewegung in Translationsbewegung zum Antrieb der Kolben eines Erdgasverdichters - Google Patents

Mechanismus zur Umwandlung von Drehbewegung in Translationsbewegung zum Antrieb der Kolben eines Erdgasverdichters Download PDF

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Publication number
EP2177758A1
EP2177758A1 EP09173035A EP09173035A EP2177758A1 EP 2177758 A1 EP2177758 A1 EP 2177758A1 EP 09173035 A EP09173035 A EP 09173035A EP 09173035 A EP09173035 A EP 09173035A EP 2177758 A1 EP2177758 A1 EP 2177758A1
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EP
European Patent Office
Prior art keywords
piston
compressor
motion
drive
crankshaft
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.)
Withdrawn
Application number
EP09173035A
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English (en)
French (fr)
Inventor
Osvaldo Del Campo
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.)
GNC Galileo SA
Original Assignee
GNC Galileo SA
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 GNC Galileo SA filed Critical GNC Galileo SA
Publication of EP2177758A1 publication Critical patent/EP2177758A1/de
Withdrawn legal-status Critical Current

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    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/02—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having two cylinders

Definitions

  • the present invention relates to a mechanism for transforming circular motion from, for example, the shaft of an electric motor or an internal combustion engine or the like to a translation movement for driving the pistons of a gas compressor, preferably a compressed natural gas (CNG) compressor.
  • a gas compressor preferably a compressed natural gas (CNG) compressor.
  • Reciprocating compressors are already widely used in different industries, and are one of the oldest compressor designs, but remains being the most versatile and highly effective ones.
  • This type of compressor drives a piston forward in a cylinder via a connecting rod and a crankshaft. If only one side of the piston is used for compression, it is described as a single action compressor. If both sides of the piston are used, top and bottom, it is called double action compressor.
  • the versatility of reciprocating compressors has no limits. It compresses both air and gases, with small modifications.
  • the piston compressor is the only design capable of compressing air and gas to high pressures, such as breathing air applications.
  • the configuration of a piston compressor can be from a single cylinder for low pressure / low volume applications to a multi-stage configuration capable of compressing fluids to very high pressures. In the later case, air is compressed in stages, increasing the pressure before entering the next stage to compress also high pressure air.
  • Typical applications for this type of compression includes natural gas (CNG, nitrogen, inert gas, landfill gas), high pressure (breathing air for diving cylinders, seismic surveys, air injection circuits), PET bottling, boot motors, etc.
  • CNG natural gas
  • nitrogen inert gas
  • landfill gas high pressure
  • high pressure shield air for diving cylinders, seismic surveys, air injection circuits
  • PET bottling boot motors, etc.
  • the mechanism for converting the circular motion of the driving motor shaft to a linear motion of the piston compressor commonly used in such compressors is the connecting rod-crank type.
  • the most common current example of this type is found in the internal combustion engine of a car, where the linear movement of the piston is transmitted to the rod by the explosion of gasoline and becomes circular motion in the crankshaft.
  • this mechanism is older than the automobile and was used in steam locomotives, although in this case it was for the inverse function, that is to say converting the linear motion of piston driven by high- pressure steam to a circular movement which drives the wheels of the locomotive.
  • this mechanism is created with two "bars” joined together by a union of revolute. One end of the bar that rotates (the handle) is attached to a fixed point, the fulcrum, and the other end is attached to the rod. The remaining end of the rod is attached to a piston that moves in a straight line.
  • the reciprocating compressors operate on the adiabatic principle by which gas is introduced into the cylinder by the inlet valves; it is retained and compressed in the cylinder and exits through the exhaust valves, against the discharge pressure. These compressors are rarely used as individual units, unless the process requires intermittent operation.
  • the reciprocating compressors have contact parts such as piston rings to cylinder walls, springs and valve plates or disks that are attached to their seats and between the gasket and rods. All these parties are subject to wear by friction. That is why they can be lubricated or non-lubricated. If the process allows it, it is preferable to have a lubricated compressor, because the pieces will last longer.
  • the reciprocating compressors should have, preferably, low-speed direct link engines, especially if they have more than 300 HP and work at constant speed.
  • Single phase or single direction compressors are those which piston performs a single stage of compression (compression action is executed by only one side of the piston).
  • Dual phase, biphasic, double effect or reciprocal compressors are those which piston performs a dual compression (compression action is performed by both sides of the piston).
  • the reciprocating compressors range from a very small capacity to about 3,000 PCMS and are used for high pressure and at a rather low cost.
  • the number of stages or cylinders must be chosen in relation to the discharge temperatures, space available for the cylinders and load on the compressor body or rod.
  • the total compression ratio is determined to have an initial idea about the number of compression stages necessary. If the ratio is very high, between 3.0 and 3.5 for a single stage, then the square root of the overall relationship will be equal to the ratio per stage for the two stages, the cube root for three stages, etc.
  • the inter-stage pressure and the ratio of actual stages will be modified after taking into account the pressure drop in inter-coolers, inter-stage pipeline, separators and pulsation dampers, if used.
  • Piston compressors compress gases and vapors in a cylinder through a piston in a rectilinear movement and are used for driving pneumatic tools (6 to 7 kg/cm2), ammonia refrigeration plants (up to 12 kg/cm2), supply gas transmission (up to 40 kg/cm2), liquefaction of air (up to 200 kg/cm2), compressed air locomotives (up 225kg/cm2) and hydrogenation and synthesis under pressure (more than 1000 kg/cm2).
  • the present invention relates to a driving mechanism of a lubricated reciprocating gas compressor that receives circular motion from a motor shaft and converts it into a linear driving motion to move the pistons of a compressor.
  • the purposed invention does not use traditional rod systems, but a rectangular driving piece that sits, on a linearly movable way, inside a chamber and is coupled to a crankshaft. When the crankshaft rotates the rectangular piece tries to rotate too, but divides the rotational movement in an up-down movement within the aforementioned camera and a horizontal linear movement of the right-left type. As the aforementioned camera has in turn the ends of the piston rods of the compressor linked, they cause the linear displacement thereof, as will be explained in detail later.
  • the purposed invention replaces the traditional rod systems with a simple mechanism that simplifies the set and their maintenance, and allows miniaturization.
  • Figure 1 is a general perspective view of a compressor including the purposed conversion mechanism of the present invention.
  • the compressor has three pairs of twin opposed cylinders of different sizes. It is also possible to see in this figure the shaft to which the driving motor is coupled while the remaining internal means lie hidden behind a cover or block.
  • FIG 2 is another general perspective view similar to the previous one but this time the cover or block has been removed to visualize in detail the crankshaft and the motion transformation mechanism of the present invention.
  • Figure 3 is another perspective view showing in greater detail the parts of the invention proposed. The cylinders were removed to see in detail the crankshaft and transformation means.
  • Figure 4 is a cross section view through A-A indicated in Figure 2 .
  • the two opposite sides of the compressor cylinders with their pistons and connecting rods and the proposed transformation mechanism can be clearly seen, finally:
  • FIG 5 is another cross sectional view, this time through B-B indicated in Figure 2 .
  • the illustrated compressor has three sets of twin opposing cylinders and to each of which corresponds one of the motion transmission mechanisms of the present invention.
  • Figure 1 illustrates the compressor equipment marked with the general reference 1, which has a chassis 2 on which a housing 3 containing the moving parts of the compressor is mounted. At the sides of the housing there are three pairs of opposing twin-cylinder 4-5-6 which have different sizes. Each pair of cylinders is aligned and houses a respective piston-rod system inside, as will be explained later.
  • a shaft 7 extends and defines the nose of the crankshaft which is coupled, as usual, to an engine (not illustrated) that will be responsible for driving the compressor. At the end of said crankshaft, there is a wheel 7 '.
  • crankshaft 9 can be seen in great detail.
  • the proposed processing mechanism is coupled to said crankshaft and is marked with references 10-11 and 12, each of which corresponds to the pairs of cylinders 4-5-6 respectively. This means that each of these mechanisms is responsible for driving the pairs of pistons housed within the cylinders 4-5-6 according to the detail that follows.
  • FIG. 3 This Figure illustrates in detail the chassis 2 on which crankshaft 9 is mounted, and to which the purposed transmission mechanism 10-11-12 is coupled. For clarity purposes the set of cylinders and pistons have been removed in these figures to see, with greater detail, how the mechanism is mounted including openings 13 over which the purposed mechanism 10-11-12 moves.
  • Figure 4 is a cross sectional view which will be used later to detail the operation of the proposed mechanism.
  • a piston 14 is housed in each cylinder 4 moving linearly within the compression chamber 15 of the mentioned cylinder 4.
  • Attached to the piston is a connecting rod 16 which end 16' instead of being coupled to the crankshaft through the connecting rod cap and screws is coupled via bolts 17 to a coupling plate 18 which in turn define the side covers of the parallelepiped housing 10 of the proposed mechanism.
  • the crankshaft 9 is linked to the central rectangular piece 19 of mechanism 10 and more particularly that the part 19 includes two halves 19'-19" united by bolts ad-hoc 20.
  • Figure 5 is another longitudinal cross sectional view, this time through line B-B indicated in Figure 2 , and in which the whole development of the crankshaft from its tip or nose 7 to the wheel 7', with their respective main gudgeons and counterweights, and mechanisms 10-11-12 can be clearly seen
  • Compressor 1 has the tip of crankshaft 7 coupled to a motor (not shown) that can be an electric motor or internal combustion engine.
  • This motor causes the rotation of crankshaft 9 and the subsequent turn of main gudgeons and counterweights 21.
  • said rectangular piece 19 cannot rotate as the counterweight because on one side it can move in an ascending-descending way inside the parallelepiped housing 10 and also the camera 10 moves linearly in a horizontal way 22 defined by the housing 3.
  • the driving part 19 decomposes the circular motion in two linear motions, one up-down motion inside the parallelepiped housing 10 and another horizontal linear motion within the camera 22.
  • the end 16 'of the connecting rod 16 is linked to the lateral aspect of the aforementioned housing 10 through the plate 18, when it moves horizontally it also moves the rod horizontally, and consequently the piston 14.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)
EP09173035A 2008-10-15 2009-10-14 Mechanismus zur Umwandlung von Drehbewegung in Translationsbewegung zum Antrieb der Kolben eines Erdgasverdichters Withdrawn EP2177758A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ARP080104488 AR068874A1 (es) 2008-10-15 2008-10-15 Mecanismo de transformacion del movimiento circular a un movimiento de traslacion para impulsar los pistones de un compresor de gas

Publications (1)

Publication Number Publication Date
EP2177758A1 true EP2177758A1 (de) 2010-04-21

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EP09173035A Withdrawn EP2177758A1 (de) 2008-10-15 2009-10-14 Mechanismus zur Umwandlung von Drehbewegung in Translationsbewegung zum Antrieb der Kolben eines Erdgasverdichters

Country Status (3)

Country Link
EP (1) EP2177758A1 (de)
AR (1) AR068874A1 (de)
BR (1) BRPI0904045A2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016134464A1 (en) * 2015-02-25 2016-09-01 A.H.M.S., Inc. Drive mechanism module for a reciprocating pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB387409A (en) * 1931-09-03 1933-02-09 Nicolas Herzmark Improvements in and relating to air or gas compressors
GB407410A (en) * 1932-09-26 1934-03-22 Edward Alexander Stanley Swins An improved crank drive for pumps
US3053194A (en) * 1960-11-25 1962-09-11 Chamberlain Corp Enclosed liquid pump
US5030065A (en) * 1989-03-23 1991-07-09 Sulzer Brothers Limited Reciprocating compressor
WO2008010490A1 (fr) * 2006-07-18 2008-01-24 Univ Shizuoka Nat Univ Corp MOTEUR ALTERNATIF cycloïdAL ET POMPE EMPLOYANT CE MÉCANISME DE VILEBREQUIN

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB387409A (en) * 1931-09-03 1933-02-09 Nicolas Herzmark Improvements in and relating to air or gas compressors
GB407410A (en) * 1932-09-26 1934-03-22 Edward Alexander Stanley Swins An improved crank drive for pumps
US3053194A (en) * 1960-11-25 1962-09-11 Chamberlain Corp Enclosed liquid pump
US5030065A (en) * 1989-03-23 1991-07-09 Sulzer Brothers Limited Reciprocating compressor
WO2008010490A1 (fr) * 2006-07-18 2008-01-24 Univ Shizuoka Nat Univ Corp MOTEUR ALTERNATIF cycloïdAL ET POMPE EMPLOYANT CE MÉCANISME DE VILEBREQUIN

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016134464A1 (en) * 2015-02-25 2016-09-01 A.H.M.S., Inc. Drive mechanism module for a reciprocating pump
US10415554B2 (en) 2015-02-25 2019-09-17 A.H.M.S., Inc. Drive mechanism module for a reciprocating pump

Also Published As

Publication number Publication date
BRPI0904045A2 (pt) 2010-12-21
AR068874A1 (es) 2009-12-09

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