CA2618549A1 - Non-positive compressor - Google Patents
Non-positive compressor Download PDFInfo
- Publication number
- CA2618549A1 CA2618549A1 CA002618549A CA2618549A CA2618549A1 CA 2618549 A1 CA2618549 A1 CA 2618549A1 CA 002618549 A CA002618549 A CA 002618549A CA 2618549 A CA2618549 A CA 2618549A CA 2618549 A1 CA2618549 A1 CA 2618549A1
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- Canada
- Prior art keywords
- compressor
- embodied
- medium
- cylinder
- operating liquid
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
- F04F1/06—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
- F04F1/10—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped of multiple type, e.g. with two or more units in parallel
- F04F1/12—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped of multiple type, e.g. with two or more units in parallel in series
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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
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B27/06—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary
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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
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/0804—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
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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
- 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
- F04B39/0011—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 liquid pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
- F04F1/06—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
- F04F1/06—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
- F04F1/10—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped of multiple type, e.g. with two or more units in parallel
Abstract
The invention relates to a compressor (1) with at least one displacement cylinder (S), in which an operating fluid (15), in particular, an ionic fluid is arranged which may be brought into connection with a suction inlet (10) and a pumped outlet (11) for medium. The operating medium (15) has a working connection to a drive pump which is an axial piston pump (17). According to the invention, a compressor may be provided with low assembly complexity and a long service life, wherein the suction inlet (10) of the compressor (1) is provided with a pre-compressor (30)
Description
Description Non-positive Compressor The invention relates to a compressor with at least one displacer cylinder, in which an operating fluid, in particular an ionic fluid, is arranged, which may be brought into connection with a suction inlet and a pumped outlet for medium, wherein the operating liquid has a working connection to a drive pump embodied as an axial piston pump.
These types of compressors are used for compressing gaseous media. The medium in this case is displaced by means of the operating liquid in the displacer cylinder, whereby these types of compressors are designated as non-positive compressors. An ionic liquid can be used as the operating liquid. However, it is also possible to use liquids with a low vapor pressure or liquids with low gas solubility. What these types of liquids have in common is that they do not dissolve in the medium and can be separated from the medium without leaving a residue so that the compressed medium exhibits a high level of purity.
The operating fluid is pumped in this case into the displacer cylinders by means of a drive pump embodied as an axial piston pump and suctioned from the displacer cylinders in order to convey the medium from the suction inlet to the pumped outlet and pressurize it. When using an axial piston pump as a drive pump, it is necessary for the safe operation of the compressor that, during the suction stroke of the axial piston pump, when the operating liquid is being suctioned from the displacer cylinder, the pistons of the axial piston machine, which as a rule are provided with hydrostatic relief, be kept in contact with a slide path of the axial piston pump.
To do this, providing the axial piston pump with a mechanical retracting device, which keeps the pistons in contact with the slide path, is known. This type of mechanical retracting device, however, is associated with a high construction expense.
These types of compressors are used for compressing gaseous media. The medium in this case is displaced by means of the operating liquid in the displacer cylinder, whereby these types of compressors are designated as non-positive compressors. An ionic liquid can be used as the operating liquid. However, it is also possible to use liquids with a low vapor pressure or liquids with low gas solubility. What these types of liquids have in common is that they do not dissolve in the medium and can be separated from the medium without leaving a residue so that the compressed medium exhibits a high level of purity.
The operating fluid is pumped in this case into the displacer cylinders by means of a drive pump embodied as an axial piston pump and suctioned from the displacer cylinders in order to convey the medium from the suction inlet to the pumped outlet and pressurize it. When using an axial piston pump as a drive pump, it is necessary for the safe operation of the compressor that, during the suction stroke of the axial piston pump, when the operating liquid is being suctioned from the displacer cylinder, the pistons of the axial piston machine, which as a rule are provided with hydrostatic relief, be kept in contact with a slide path of the axial piston pump.
To do this, providing the axial piston pump with a mechanical retracting device, which keeps the pistons in contact with the slide path, is known. This type of mechanical retracting device, however, is associated with a high construction expense.
A generic non-positive compressor has a high service life because of the lack of mechanical seals and the lack of pistons in the displacer cylinders. Adapting an axial piston pump having a retracting device to the high service life of the non-positive compressor also requires a high construction expense.
The present invention is based on the objective of providing a compressor of the species cited at the outset with low construction expense and a long service life.
This objective is attained in accordance with the invention in that the suction inlet of the compressor is provided with a pre-compressor. A compressor having an upstream pre-compressor can generate, at the suction inlet of the compressor, a minimum preliminary pressure of the medium being pumped in a simple manner. This preliminary pressure generated by the pre-compressor is also available at the axial piston pump via the operating liquid, which is in direct contact with the medium to be pumped, and said preliminary pressure acts on the pistons of the axial piston pump during the suction stroke in the direction of the slide path. As a result, an inventive pre-compressor makes it possible to achieve a low construction expense and guarantee that, in the case of the axial piston pump, the pistons remain in contact with the slide path without a mechanical retracting device and/or without modifications to the retracting device. This makes it possible to adapt the service life of the axial piston pump without appreciable modifications to the retracting device in a simple way to the high service life of the non-positive compressor, which makes it possible to achieve a high service life of the compressor with low construction expense using a standardized axial piston pump.
Various designs of compressors and/or pumps can be used as pre-compressors.
There are special advantages if the pre-compressor is embodied as a screw compressor in accordance with a preferred embodiment of the invention. Because of the high service life of a non-positive compressor, it is necessary to select a pre-compressor with a correspondingly high service life in order to prevent the pre-compressor from being the weakest link in the service life chain. A
screw compressor does not require any operating seals that have a high level of seal tightness, which results in a standardized screw compressor having a high service life.
In addition, a screw compressor features low pulsations, which makes it possible to achieve low noise emissions and low stress for the compressor on the suction side.
According to an advantageous development of the invention of the pre-compressor, the pre-compressor can be lubricated with the operating liquid with special advantage.
Lubricating the pre-compressor with the operating liquid prevents the to-be-pumped medium from getting contaminated due to the use of the pre-compressor. Because of lubrication with the operating liquid, the screw compressor only emits the operating liquid already present in the process, whereby a negative impact on the functioning of the compressor does not occur.
According to a preferred development of the invention, the pumped outlet of the compressor is provided with a separating device for separating operating liquid located in the pumped medium.
This type of separating device, which can be used to separate operating liquid emitted into the pumped medium by the compressor, can also separate the operating liquid emitted into the medium by the pre-compressor lubricated with the operating liquid. As a result, an additional separating device is not required on the suction side of the compressor in order to separate any operating liquid possibly emitted into the to-be-pumped medium by the screw compressor lubricated with the operating liquid.
According to a preferred embodiment of the invention, the axial piston pump has a cylindrical drum, in which at least one cylinder space is embodied, which is connected to the displacer cylinder, wherein a piston is arranged in the cylinder space in a longitudinally displaceable manner, which piston is supported on a slide path, in particular an adjustable diagonal plate. As a result, it is simple to realize a connection of the displacer cylinder to the cylinder space and therefore to the piston in order achieve secure contact of the piston on the slide path formed by the diagonal plate with the preliminary pressure generated by the pre-compressor, during the suction stroke of the drive pump.
There are special advantages if the displacer cylinders are arranged in a cylinder block and attached radially. Because of the radial arrangement of the displacer cylinders in a rotating cylinder block, a centrifugal force acts on the operating liquid present in the displacer cylinders, which makes a high compressor speed possible. As a result, a high pump output can be achieved with a low requirement for construction space for the compressor. In addition, only a small quantity of operating liquid is required, whereby the compressor has low manufacturing costs and operating costs.
According to a preferred structural embodiment of the invention, the cylinder block and the cylindrical drum are coupled in a rotationally synchronous manner or embodied to be one-piece.
If a pressure of 5-15 bar, in particular a pressure of 8-10 bar, can be generated by means of the pre-compressor on the suction inlet, a secure abutment of the piston on the slide path formed by the diagonal plate can be guaranteed during compressor operation when using a standardized axial piston pump.
The compressor can be embodied for conveying liquids.
There are special advantages if the compressor is embodied for compressing a gaseous medium, in particular hydrogen. With an inventive non-positive compressor, in which a preliminary pressure of the gaseous medium can be generated on the suction side by means of a standardized pre-compressor that is lubricated with the operating liquid, a standardized axial piston machine can be used as a drive pump for the operating liquid, which results in lower manufacturing costs with a long service life for the non-positive compressor when using standardized components.
Additional advantages and details of the invention are explained in greater detail on the basis of the exemplary embodiment depicted schematically in the figure.
The figure depicts a longitudinal section of an inventive compressor 1. A
drive shaft 3 is rotatably mounted within a housing 2 around an axis of rotation 4. A
cylindrical drum 5, in which several displacer cylinders 6 are embodied, is coupled to the drive shaft 3 in a rotationally synchronous manner. The displacer cylinders 6 in this case are embodied radial bores 14 arranged in the cylindrical drum 5 and are arranged in a star-shape around the axis of rotation 4, whereby the longitudinal axis 7 of the displacer cylinders 6 is arranged perpendicularly to the axis of rotation 4 of the drive shaft 3 and thus of the cylindrical drum 5.
In the radial inner region, the displacer cylinders 6 are each connected to a connecting passage 8, which is operatively connected to a plate-shaped valve plate 9, whereby the connection of the displacer cylinders 6 to a suction inlet 10 as well as to a pumped outlet 11 can be controlled during rotation of the cylindrical drum 5 by means of the valve plate 9. The cylindrical drum 5 in this case is supported in the axial direction on the valve plate 9, which is arranged on a housing cover 12 fastened to the housing 2.
An operating liquid 15, in particular an ionic liquid, is arranged in the displacer cylinders 6.
Each displacer cylinder 6 is connected by means of a connecting passage 13 to a cylinder space 16 of a hydraulic drive pump embodied as an axial piston pump 17 having a diagonal plate design. In this case, the drive pump embodied as an axial piston pump 17 has a cylinder block 18, which is arranged coaxially to the cylindrical drum 5 and is connected to the cylindrical drum 5 and/or the drive shaft 3 in a rotationally fixed manner. It is also possible to embody the cylinder block 18 and the cylindrical drum 5 as a comtnon and therefore one-piece cylindrical drum.
The cylinder spaces 16 of the axial piston pump 17 are formed by the longitudinal bores 20 arranged concentrically in the cylinder block 18, in which bores pistons 21 are respectively arranged in a longitudinally displaceable manner. The pistons 21 are each supported by means of a sliding block 22 on a slide path 23, which is embodied on a diagonal plate. A spherical sliding block articulation is embodied between the piston 21 and sliding block 22.
The axial piston machine 17 is embodied as an axial piston machine whose displacer volume can be adjusted, whereby the diagonal plate provided with the slide path 23 is swivel-mounted on the housing 2 and can be inclined with respect the axis of rotation 4 by means of a regulating device (not shown).
The present invention is based on the objective of providing a compressor of the species cited at the outset with low construction expense and a long service life.
This objective is attained in accordance with the invention in that the suction inlet of the compressor is provided with a pre-compressor. A compressor having an upstream pre-compressor can generate, at the suction inlet of the compressor, a minimum preliminary pressure of the medium being pumped in a simple manner. This preliminary pressure generated by the pre-compressor is also available at the axial piston pump via the operating liquid, which is in direct contact with the medium to be pumped, and said preliminary pressure acts on the pistons of the axial piston pump during the suction stroke in the direction of the slide path. As a result, an inventive pre-compressor makes it possible to achieve a low construction expense and guarantee that, in the case of the axial piston pump, the pistons remain in contact with the slide path without a mechanical retracting device and/or without modifications to the retracting device. This makes it possible to adapt the service life of the axial piston pump without appreciable modifications to the retracting device in a simple way to the high service life of the non-positive compressor, which makes it possible to achieve a high service life of the compressor with low construction expense using a standardized axial piston pump.
Various designs of compressors and/or pumps can be used as pre-compressors.
There are special advantages if the pre-compressor is embodied as a screw compressor in accordance with a preferred embodiment of the invention. Because of the high service life of a non-positive compressor, it is necessary to select a pre-compressor with a correspondingly high service life in order to prevent the pre-compressor from being the weakest link in the service life chain. A
screw compressor does not require any operating seals that have a high level of seal tightness, which results in a standardized screw compressor having a high service life.
In addition, a screw compressor features low pulsations, which makes it possible to achieve low noise emissions and low stress for the compressor on the suction side.
According to an advantageous development of the invention of the pre-compressor, the pre-compressor can be lubricated with the operating liquid with special advantage.
Lubricating the pre-compressor with the operating liquid prevents the to-be-pumped medium from getting contaminated due to the use of the pre-compressor. Because of lubrication with the operating liquid, the screw compressor only emits the operating liquid already present in the process, whereby a negative impact on the functioning of the compressor does not occur.
According to a preferred development of the invention, the pumped outlet of the compressor is provided with a separating device for separating operating liquid located in the pumped medium.
This type of separating device, which can be used to separate operating liquid emitted into the pumped medium by the compressor, can also separate the operating liquid emitted into the medium by the pre-compressor lubricated with the operating liquid. As a result, an additional separating device is not required on the suction side of the compressor in order to separate any operating liquid possibly emitted into the to-be-pumped medium by the screw compressor lubricated with the operating liquid.
According to a preferred embodiment of the invention, the axial piston pump has a cylindrical drum, in which at least one cylinder space is embodied, which is connected to the displacer cylinder, wherein a piston is arranged in the cylinder space in a longitudinally displaceable manner, which piston is supported on a slide path, in particular an adjustable diagonal plate. As a result, it is simple to realize a connection of the displacer cylinder to the cylinder space and therefore to the piston in order achieve secure contact of the piston on the slide path formed by the diagonal plate with the preliminary pressure generated by the pre-compressor, during the suction stroke of the drive pump.
There are special advantages if the displacer cylinders are arranged in a cylinder block and attached radially. Because of the radial arrangement of the displacer cylinders in a rotating cylinder block, a centrifugal force acts on the operating liquid present in the displacer cylinders, which makes a high compressor speed possible. As a result, a high pump output can be achieved with a low requirement for construction space for the compressor. In addition, only a small quantity of operating liquid is required, whereby the compressor has low manufacturing costs and operating costs.
According to a preferred structural embodiment of the invention, the cylinder block and the cylindrical drum are coupled in a rotationally synchronous manner or embodied to be one-piece.
If a pressure of 5-15 bar, in particular a pressure of 8-10 bar, can be generated by means of the pre-compressor on the suction inlet, a secure abutment of the piston on the slide path formed by the diagonal plate can be guaranteed during compressor operation when using a standardized axial piston pump.
The compressor can be embodied for conveying liquids.
There are special advantages if the compressor is embodied for compressing a gaseous medium, in particular hydrogen. With an inventive non-positive compressor, in which a preliminary pressure of the gaseous medium can be generated on the suction side by means of a standardized pre-compressor that is lubricated with the operating liquid, a standardized axial piston machine can be used as a drive pump for the operating liquid, which results in lower manufacturing costs with a long service life for the non-positive compressor when using standardized components.
Additional advantages and details of the invention are explained in greater detail on the basis of the exemplary embodiment depicted schematically in the figure.
The figure depicts a longitudinal section of an inventive compressor 1. A
drive shaft 3 is rotatably mounted within a housing 2 around an axis of rotation 4. A
cylindrical drum 5, in which several displacer cylinders 6 are embodied, is coupled to the drive shaft 3 in a rotationally synchronous manner. The displacer cylinders 6 in this case are embodied radial bores 14 arranged in the cylindrical drum 5 and are arranged in a star-shape around the axis of rotation 4, whereby the longitudinal axis 7 of the displacer cylinders 6 is arranged perpendicularly to the axis of rotation 4 of the drive shaft 3 and thus of the cylindrical drum 5.
In the radial inner region, the displacer cylinders 6 are each connected to a connecting passage 8, which is operatively connected to a plate-shaped valve plate 9, whereby the connection of the displacer cylinders 6 to a suction inlet 10 as well as to a pumped outlet 11 can be controlled during rotation of the cylindrical drum 5 by means of the valve plate 9. The cylindrical drum 5 in this case is supported in the axial direction on the valve plate 9, which is arranged on a housing cover 12 fastened to the housing 2.
An operating liquid 15, in particular an ionic liquid, is arranged in the displacer cylinders 6.
Each displacer cylinder 6 is connected by means of a connecting passage 13 to a cylinder space 16 of a hydraulic drive pump embodied as an axial piston pump 17 having a diagonal plate design. In this case, the drive pump embodied as an axial piston pump 17 has a cylinder block 18, which is arranged coaxially to the cylindrical drum 5 and is connected to the cylindrical drum 5 and/or the drive shaft 3 in a rotationally fixed manner. It is also possible to embody the cylinder block 18 and the cylindrical drum 5 as a comtnon and therefore one-piece cylindrical drum.
The cylinder spaces 16 of the axial piston pump 17 are formed by the longitudinal bores 20 arranged concentrically in the cylinder block 18, in which bores pistons 21 are respectively arranged in a longitudinally displaceable manner. The pistons 21 are each supported by means of a sliding block 22 on a slide path 23, which is embodied on a diagonal plate. A spherical sliding block articulation is embodied between the piston 21 and sliding block 22.
The axial piston machine 17 is embodied as an axial piston machine whose displacer volume can be adjusted, whereby the diagonal plate provided with the slide path 23 is swivel-mounted on the housing 2 and can be inclined with respect the axis of rotation 4 by means of a regulating device (not shown).
However, it is also possible to embody the axial piston machine with a fixed displacer volume, whereby the diagonal plate can be embodied directly on the housing 2.
In this case, the cylindrical drum 5 and the drive pump 17 are arranged in the common housing.
According to the invention, the suction inlet 10 of the compressor 1 is provided with a pre-compressor 30. The pre-compressor 30 is embodied as a screw compressor and is lubricated with the operating liquid 15.
In this case, the pre-compressor 30 generates a preliminary pressure of the medium of approx. 8-bar at the suction inlet 10. Via the operating liquid 15 present in the displacer cylinders 6, the connecting passages 13 and the cylinder bores 16, which is in direct contact with the medium, the preliminary pressure of the medium acts on the pistons 21 in the direction of the slide path 23 embodied on the diagonal plate. This results in a secure abutment of the pistons 21 on the slide path 23 during the suction stroke of the axial piston pump 17.
The pumped outlet 11 is provided with a separating device 31, which can be used to separate any operating liquid 15 possibly emitted into the pumped outlet 11 from the pumped medium. As a result, a high level of purity of the pumped medium is achieved.
When operating the inventive compressor 1, the drive shaft 3 drives the cylindrical drum 5 and the cylinder block 18. The axial piston pump pumps operating liquid 15 from the cylinder spaces 16 into the displacer cylinders 6, whereby the medium flowing into the displacer cylinders 6 via the suction inlet 10 is compressed by the liquid 15 and conveyed to the pumped outlet 11. In this case, the preliminary pressure of the medium at the suction inlet 10 that is generated by the pre-compressor 30 guarantees a secure abutment of the pistons 21 of the drive pump embodied as an axial piston pump 17 on the slide path 23. When the compressor 1 is in operation, centrifugal force acts on the liquid 15 due to the radial arrangement of the displacer cylinders 6 through the rotation of the cylindrical drum 5, and this centrifugal force accelerates the operating liquid, allowing the liquid column of the operating liquid 15 to be moved at a great speed into the displacer cylinders 6 and thus the compressor 1 can be operated at a great rotational speed and therefore at a high cycle speed. As a result, high pump output is achieved with low construction space for the compressor 1 and a low requirement for operating liquid 15.
Because of the preliminary pressure of the medium generated by the pre-compressor 30, a standardized axial piston pump 17 can be used in this case, which is adapted to the high service life of the non-positive compressor 1 without appreciable modifications to the mechanical retracting device. The embodiment of the pre-compressor 30 as a standardized screw compressor, which is lubricated with the operating liquid 15, makes it possible to adapt the service life of standardized pre-compressor 30 to the high service life of the non-positive compressor with low construction expense. The operating liquid 15 emitted by the pre-compressor 30 into the to-be-pumped medium can be separated in a simple way from the pumped medium by means of the separating device 31 allocated to the pumped outlet 11. All in all, it is therefore possible to realize a non-positive compressor 1 with low manufacturing expense, low construction effort and low operating costs.
In this case, the cylindrical drum 5 and the drive pump 17 are arranged in the common housing.
According to the invention, the suction inlet 10 of the compressor 1 is provided with a pre-compressor 30. The pre-compressor 30 is embodied as a screw compressor and is lubricated with the operating liquid 15.
In this case, the pre-compressor 30 generates a preliminary pressure of the medium of approx. 8-bar at the suction inlet 10. Via the operating liquid 15 present in the displacer cylinders 6, the connecting passages 13 and the cylinder bores 16, which is in direct contact with the medium, the preliminary pressure of the medium acts on the pistons 21 in the direction of the slide path 23 embodied on the diagonal plate. This results in a secure abutment of the pistons 21 on the slide path 23 during the suction stroke of the axial piston pump 17.
The pumped outlet 11 is provided with a separating device 31, which can be used to separate any operating liquid 15 possibly emitted into the pumped outlet 11 from the pumped medium. As a result, a high level of purity of the pumped medium is achieved.
When operating the inventive compressor 1, the drive shaft 3 drives the cylindrical drum 5 and the cylinder block 18. The axial piston pump pumps operating liquid 15 from the cylinder spaces 16 into the displacer cylinders 6, whereby the medium flowing into the displacer cylinders 6 via the suction inlet 10 is compressed by the liquid 15 and conveyed to the pumped outlet 11. In this case, the preliminary pressure of the medium at the suction inlet 10 that is generated by the pre-compressor 30 guarantees a secure abutment of the pistons 21 of the drive pump embodied as an axial piston pump 17 on the slide path 23. When the compressor 1 is in operation, centrifugal force acts on the liquid 15 due to the radial arrangement of the displacer cylinders 6 through the rotation of the cylindrical drum 5, and this centrifugal force accelerates the operating liquid, allowing the liquid column of the operating liquid 15 to be moved at a great speed into the displacer cylinders 6 and thus the compressor 1 can be operated at a great rotational speed and therefore at a high cycle speed. As a result, high pump output is achieved with low construction space for the compressor 1 and a low requirement for operating liquid 15.
Because of the preliminary pressure of the medium generated by the pre-compressor 30, a standardized axial piston pump 17 can be used in this case, which is adapted to the high service life of the non-positive compressor 1 without appreciable modifications to the mechanical retracting device. The embodiment of the pre-compressor 30 as a standardized screw compressor, which is lubricated with the operating liquid 15, makes it possible to adapt the service life of standardized pre-compressor 30 to the high service life of the non-positive compressor with low construction expense. The operating liquid 15 emitted by the pre-compressor 30 into the to-be-pumped medium can be separated in a simple way from the pumped medium by means of the separating device 31 allocated to the pumped outlet 11. All in all, it is therefore possible to realize a non-positive compressor 1 with low manufacturing expense, low construction effort and low operating costs.
Claims (9)
1. Compressor with at least one displacer cylinder, in which an operating fluid, in particular an ionic fluid, is arranged, which may be brought into connection with a suction inlet and a pumped outlet for medium, wherein the operating liquid has a working connection to a drive pump embodied as an axial piston pump, characterized in that the suction inlet (10) of the compressor (1) is provided with a pre-compressor (30).
2. Compressor according to Claim 1, characterized in that the pre-compressor (30) is embodied as a screw compressor.
3. Compressor according to Claim 1 or 2, characterized in that the pre-compressor (30) can be lubricated with the operating liquid (15).
4. Compressor according to one of Claims 1 through 3, characterized in that the pumped outlet (11) of the compressor (1) is provided with a separating device (31) for separating operating liquid (15) located in the pumped medium.
5. Compressor according to one of Claims 1 through 4, characterized in that the axial piston pump (17) has a cylindrical drum (18), in which at least one cylinder space (16) is embodied, which is connected to the displacer cylinder (6), wherein a piston (21) is arranged in the cylinder space (16) in a longitudinally displaceable manner, which piston is supported on a slide path (23), in particular an adjustable diagonal plate.
6. Compressor according to one of Claims 1 through 5, characterized in that the displacer cylinder (6) is arranged in a cylinder block (5) and attached radially.
7. Compressor according to Claim 5 or 6, characterized in that the cylinder block (5) and the cylindrical drum (17) are coupled in a rotationally synchronous manner or embodied to be one-piece.
8. Compressor according to one of Claims 1 through 7, characterized in that a pressure of 5-15 bar, in particular a pressure of 8-10 bar, can be generated by means of the pre-compressor (30) on the suction inlet.
9. Compressor according to one of the preceding Claims, characterized in that the compressor (1) is embodied for compressing a gaseous medium, in particular hydrogen.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005038268.1 | 2005-08-12 | ||
| DE102005038268A DE102005038268A1 (en) | 2005-08-12 | 2005-08-12 | Pistonless compressor |
| PCT/EP2006/007330 WO2007019947A1 (en) | 2005-08-12 | 2006-07-25 | Non-positive compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2618549A1 true CA2618549A1 (en) | 2007-02-22 |
Family
ID=37102007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002618549A Abandoned CA2618549A1 (en) | 2005-08-12 | 2006-07-25 | Non-positive compressor |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1913264B1 (en) |
| KR (1) | KR20080033397A (en) |
| CN (1) | CN101243258A (en) |
| AT (1) | ATE500424T1 (en) |
| AU (1) | AU2006281714A1 (en) |
| CA (1) | CA2618549A1 (en) |
| DE (2) | DE102005038268A1 (en) |
| WO (1) | WO2007019947A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009020925A1 (en) * | 2009-05-12 | 2010-11-18 | Linde Aktiengesellschaft | Compressor with piston dummy |
| DE102015007736A1 (en) * | 2015-06-16 | 2016-12-22 | Linde Aktiengesellschaft | Method and compacting device for compressing a gas |
| EP4061983A1 (en) | 2019-11-21 | 2022-09-28 | EEG Elements Energy GmbH | Electrolysis device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191009591A (en) * | 1907-02-02 | 1911-01-12 | Elie Gaucher | Improvements in and relating to Air Compressors adapted to Work as Vacuum Pumps. |
| CA1226253A (en) * | 1984-03-28 | 1987-09-01 | Ben Cowan | Liquid piston compression systems for compressing steam |
| DE19848234A1 (en) | 1998-10-20 | 2000-04-27 | Huels Infracor Gmbh | Compression of potentially explosive gases through injection of liquid into a common vessel |
| DE10035630C1 (en) * | 2000-07-21 | 2002-03-14 | Brueninghaus Hydromatik Gmbh | Axial piston machine with a retraction device |
| DE10154723A1 (en) * | 2000-11-10 | 2002-10-31 | Parker Hannifin Corp | Axial piston pump has vanes in cylinder protruding radially outwards and finishing with radially outer edge adjacent to inner wall surface of cylinder chamber, and when cylinder rotates vanes effect pre-compression of fluid |
| BR0205940A (en) | 2001-08-23 | 2004-12-28 | Neogas Inc | Method and apparatus for filling a compressed gas storage flask |
| WO2004024298A1 (en) * | 2002-08-30 | 2004-03-25 | Kalmarin Tila | Apparatus and method for pressurising biogas in a gas washer |
-
2005
- 2005-08-12 DE DE102005038268A patent/DE102005038268A1/en not_active Withdrawn
-
2006
- 2006-07-25 DE DE502006009012T patent/DE502006009012D1/en active Active
- 2006-07-25 AU AU2006281714A patent/AU2006281714A1/en not_active Abandoned
- 2006-07-25 WO PCT/EP2006/007330 patent/WO2007019947A1/en active Application Filing
- 2006-07-25 CN CNA2006800293311A patent/CN101243258A/en active Pending
- 2006-07-25 EP EP06776393A patent/EP1913264B1/en not_active Not-in-force
- 2006-07-25 CA CA002618549A patent/CA2618549A1/en not_active Abandoned
- 2006-07-25 AT AT06776393T patent/ATE500424T1/en active
- 2006-07-25 KR KR1020087003398A patent/KR20080033397A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| CN101243258A (en) | 2008-08-13 |
| WO2007019947A1 (en) | 2007-02-22 |
| KR20080033397A (en) | 2008-04-16 |
| AU2006281714A1 (en) | 2007-02-22 |
| DE502006009012D1 (en) | 2011-04-14 |
| EP1913264B1 (en) | 2011-03-02 |
| ATE500424T1 (en) | 2011-03-15 |
| EP1913264A1 (en) | 2008-04-23 |
| DE102005038268A1 (en) | 2007-02-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |