WO2023283660A1 - Rotationskolbenverdichter - Google Patents
Rotationskolbenverdichter Download PDFInfo
- Publication number
- WO2023283660A1 WO2023283660A1 PCT/AT2021/000015 AT2021000015W WO2023283660A1 WO 2023283660 A1 WO2023283660 A1 WO 2023283660A1 AT 2021000015 W AT2021000015 W AT 2021000015W WO 2023283660 A1 WO2023283660 A1 WO 2023283660A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotary piston
- planar
- side wall
- housing
- receiving channel
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims abstract description 101
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 9
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 229920000642 polymer Polymers 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 239000012783 reinforcing fiber Substances 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 claims description 2
- OFNHPGDEEMZPFG-UHFFFAOYSA-N phosphanylidynenickel Chemical compound [P].[Ni] OFNHPGDEEMZPFG-UHFFFAOYSA-N 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 82
- 238000007906 compression Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- -1 polyoxymethylene Polymers 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- VEOQUPNIEFSTFA-UHFFFAOYSA-J molybdenum(4+) sulfinato sulfite Chemical compound S(=O)([O-])OS(=O)[O-].[Mo+4].S(=O)([O-])OS(=O)[O-] VEOQUPNIEFSTFA-UHFFFAOYSA-J 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001470 polyketone Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/22—Rotary-piston pumps specially adapted for elastic fluids of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth equivalents than the outer member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C19/00—Sealing arrangements in rotary-piston machines or engines
- F01C19/08—Axially-movable sealings for working fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/005—Axial sealings for working fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/005—Axial sealings for working fluid
- F04C27/006—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type pumps, e.g. gear pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2210/00—Fluid
- F04C2210/22—Fluid gaseous, i.e. compressible
- F04C2210/222—Carbon dioxide (CO2)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/20—Rotors
Definitions
- the present invention relates to a rotary piston compressor for compressing gas, in particular carbon dioxide, wherein the rotary piston compressor has a working housing and a rotary piston, and the working housing has a
- Rotary piston compressor is shown in WO 2020/159394 A1.
- spring elements are arranged in the planar seal receiving channels in order to press the planar seals against the respective planar sealing surfaces of the housing cover of the working housing.
- these springs generally only generate low contact forces and are usually only used to feel the planar sealing surfaces.
- the actual seal is usually generated in the prior art by a gas pressure acting on the seal, the the
- the object of the invention is to propose an improvement here which ensures good sealing by means of the planar seals, in particular even at higher gas pressures in the working space.
- the invention based on a generic rotary piston compressor, proposes that, in order to press the sealing surface of the respective planar seal against the respective planar sealing surface, lateral surface openings are formed in the piston lateral surface of the rotary piston, which
- Piston jacket surface targeted jacket surface openings are provided, which trained on the interior of the rotary piston pressure feedthrough lines directly to the
- planar seal receiving channel in pressure-transmitting connection.
- the pressurized gas from the working chamber can act directly on the planar seal in the planar seal receiving channel through the lateral surface openings and the pressure feed-through lines opening into the planar seal receiving channel in order to press it against the respective planar sealing surface of the respective housing cover.
- this solution according to the invention has the advantage that fewer parts are required to press the sealing surface of the respective planar seal against the respective planar sealing surface of the respective housing cover.
- Planar seal receiving channel are completely dispensed with in the invention. Above all, in the case of the invention, however, the gas pressure from the area of the working chamber into which the respective lateral surface opening of the rotary piston opens is in the corresponding area of the
- Planar seal receiving channel available to press the respective planar seal with its sealing surface to the respective planar sealing surface of the respective housing cover. This automatically increases the contact pressure be adapted to the pressures currently present in this area of the working space. This proves its worth in particular when particularly high pressures are reached in the working chamber when compressing the gas by means of the rotary piston compressor according to the invention.
- a particularly preferred area of application for rotary piston compressors according to the invention is the compression or
- gas refers to everything that is gaseous under normal conditions, i.e. at a temperature of 20° C and a pressure of 1013.25 mbar.
- the gas in particular the carbon dioxide, can certainly be brought into a transcritical or supercritical state in which it is liquid and gaseous at the same time.
- the term gas is retained in the sense of linguistic simplification.
- the rotary piston is rotatably mounted on an eccentric.
- the rotary piston could also be referred to as a revolving piston or simply as a rotor.
- the rotary piston compressor itself could also be referred to as a rotary piston compressor.
- the planar seals could also be referred to as piston base seals.
- the pressure lead-through lines in the rotary piston are preferably of tubular design. They can be designed, for example, as a bore or a sequence of bores opening into one another in the interior of the rotary piston. But there are other options, like this
- Pressure guide lines are formed in the rotary piston.
- the lateral surface openings are preferably at a distance from the piston base surfaces in the
- Piston skirt surface formed.
- planar seals in the respective planar seal receiving channel There are various options for producing and arranging the planar seals in the respective planar seal receiving channel.
- Planar seal receiving channels are produced directly.
- a preferred variant provides, for example, that the planar seals are each injected as an injection molded part into the respective planar seal receiving channel.
- the planar seals are injection molded directly in the
- planar seal receiving channel made and therefore there too arranged equally.
- another variant can also provide for the planar seal to be pressed into the respective planar seal receiving channel as a 3D printed part.
- the respective planar seal is thus in each case directly by a printing process
- planar seal receiving channel Prepared planar seal receiving channel and thus arranged there at the same time.
- planar seal is pressed into the respective planar seal receiving channel as a molded part
- planar seals are each prefabricated as an insert and as such are inserted into the respective planar seal receiving channel.
- Preferred variants of the invention provide that the pressure feedthrough lines are each covered by a cap in the region of their opening into the respective planar seal receiving channel.
- the use of corresponding caps to cover the opening of the pressure feedthrough lines in the respective planar seal receiving channel is particularly favorable when the planar seal is formed directly in the planar seal receiving channel, for example by injection molding or 3D printing.
- the caps can prevent the opening of the pressure feedthrough lines from being inadvertently closed during the production process of the planar seals.
- corresponding caps can also be used if the planar seal is prefabricated as an insert and as such is inserted into the respective planar seal receiving channel.
- the wording of covering said mouth with the cap does not means that the caps seal the respective openings of the pressure feedthrough lines in a pressure-tight manner.
- the caps are just laid on. If the gas pressure in the pressure feed-through lines is appropriate, the gas can definitely penetrate past the caps into the planar seal receiving channel in order to press the planar seals with their sealing surface against the respective planar sealing surface of the respective housing cover. In other variants, however, the caps can also be omitted,
- planar seals in one of the planar seal receiving channels in one of the piston base surfaces are each designed in one piece.
- planar seals in one of the planar seal receiving channels in one of the piston base surfaces are each designed in one piece.
- the planar seal of this planar seal receiving channel is then correspondingly designed in one piece.
- the side wall surface of the housing side wall seen in a sectional plane parallel to the planar sealing surfaces of the housing cover, is completely or at least partially trochoidal in shape.
- the rotary piston preferably has two or more corner areas.
- a radial seal for sealing the rotary piston against the side wall surface of the housing side wall is arranged in each of the corner regions.
- the piston bases are in the area between two of the corner areas of the rotary piston are each delimited by a boundary line, the boundary lines each being formed as an envelope curve of a family of curves made up of trochoids.
- an elastic element pointing towards the rotary piston to be integrally formed on the radial seals in order to press the respective radial seal against the side wall surface of the housing side wall.
- planar seals each have contact surfaces for pressing the respective radial seal against the side wall surface of the housing side wall.
- These contact surfaces of the planar seals can each as
- Rotary piston compressors in the working space different, by means of the rotary piston and its corner areas separated sub-volumes in which different gas pressures prevail during operation and the size of which changes continuously during operation.
- planar seals in the corner regions of the rotary piston on their separate from the respective Sealing surface side facing away from the they are sealed receiving planar seal receiving channel.
- planar seals preferably on the side facing away from the sealing surface, have sealing webs which are in corresponding sealing web receptacles in the
- Planar seal receiving channel are arranged. In this way, areas of the planar seal receiving channel between two respectively adjacent corner areas of the rotary piston can be sealed against respectively adjacent areas of the planar seal receiving channel.
- rotary piston compressors according to the invention can also be designed with different transmission ratios.
- the gear ratio designates the ratio of the number of trochoid arches present to form the side wall surface of the housing side wall to the number of corners of the rotary piston.
- the transmission ratio is conveniently 1:2 or 2:3 or 7:6.
- the gas inlet and/or the gas outlet can be guided through the housing wall.
- the gas inlet and/or the gas outlet is/are passed through the eccentric. Mixed forms of this are also possible.
- the planar seals and/or the optionally present radial seals advantageously consist of a polymer or of a polymer with a dry lubricant and/or with reinforcing fibers.
- polymers that can be used are polyetheretherketone, polyamideimide, polyoxymethylene, polyketone, polyamide or also polyethylene terephthalate.
- Polytetrafluoroethylene or molybdenum disulphite for example, can be used as dry lubricants.
- Glass fibers or carbon fibers, for example, can be used as reinforcing fibers.
- the housing side wall and the housing cover each have a base body made of an aluminum alloy or cast iron. Is preferred on this body to form the side wall surface of the housing side wall and the planar
- a coating is applied to the sealing surfaces of the housing cover.
- the coating can be, for example, a nickel-phosphorus layer, an aluminum oxide layer or a dry lubricating anti-friction layer. A combination of at least two of these layers is also possible.
- These coatings can be applied directly to the base body.
- the adhesive layer can be, for example, an open-pored aluminum oxide layer, such as anodized or non-compacted hard anodized.
- Another variant of a carrier or adhesive layer consists of an open-pored, plasma-chemically oxidized aluminum layer.
- the carrier or adhesive layers can be made of cast iron, for example by phosphating or sandblasting.
- Fig. 1 shows the first embodiment of a rotary piston compressor 1 according to the invention in an exploded view. It is a rotary piston compressor 1 with a ratio of 1:2.
- the rotary piston compressor 1 has a working housing 2 and a rotary piston 3 .
- the working housing 2 in turn has a housing side wall 4 and housing covers 5 and 6 arranged on opposite sides of the housing wall 4 .
- these components of the working housing 2 are connected to one another by the screws 37 and the nuts 38 . This Of course, this does not necessarily have to be the case; other types of connection are also conceivable.
- the side wall surface 7 of the housing side wall 4 and the two planar sealing surfaces 8 and 9 of the respective housing covers 5 and 6 enclose the working chamber 10 arranged in the working housing 2.
- the rotary piston 3 is rotatably mounted in the working chamber 10 on the eccentric 11.
- the eccentric 11 is seated in a rotationally fixed manner on a drive shaft 30. As can be seen in FIG. 2, this ends
- the eccentric 11 is thus non-rotatably connected to the drive shaft 30 and also to the connecting pin 31 , so that rotating the drive shaft 30 about the axis of rotation 60 automatically also causes the eccentric 11 to rotate accordingly.
- an external toothing 32 is also connected in a rotationally fixed manner to the drive shaft 30 .
- This external toothing 32 engages with an internal toothing 33 which is connected to the rotary piston 3 in a torque-proof manner.
- the rotary piston 3 in the working chamber 10 is also rotated via this thread engagement when the connecting pin 31 or drive shaft 33 is rotated accordingly.
- the rotary piston 3 is rotatably mounted on the eccentric 11 in the working space 10 .
- the rotatable mounting of the drive shaft 30 in the working housing 2 takes place via the bearings 34 and the retaining ring 36.
- the bearings 34 can be both ball bearings and Act plain bearings or the like.
- the bearing 34 in the housing cover 5 is a ball bearing and the bearing 34 in the housing cover 6 is a slide bearing. Of course, this does not have to be the case and can also be carried out differently.
- a counterweight 35 is attached to the drive shaft 30 in a rotationally fixed manner, which balances the imbalance caused by the eccentricity of the rotary piston 3 .
- the working housing 2 is surrounded by an outer shell 39 of the rotary piston compressor 1 . Of course, this does not necessarily have to be the case.
- a gas inlet 12 for introducing the gas to be compressed into the working space 10 and also a gas outlet 13 with an overpressure outlet valve 14 for discharging the compressed gas from the working space 10 are provided. As explained below, this can be seen particularly well in FIGS.
- the rotary piston 3 has two, each facing one of the planar sealing surfaces 8 and 9 of the housing covers 5 and 6
- a planar seal receiving channel 18 is located in each of the piston base surfaces 15 and 16.
- a planar seal 19 is arranged in each of these planar seal receiving channels 18, with the planar seals 19 each having a sealing surface 20 for contact with one of the planar sealing surfaces 8 and 9 of the housing covers 5 and 6.
- the invention also provides for the rotary piston compressor 1 of this first exemplary embodiment that, in order to press the sealing surface 20 of the respective planar seal 19 against the respective planar sealing surface 8, 9, lateral surface openings 21 are formed in the piston lateral surface 17 of the rotary piston 3, which openings extend beyond the inside of the rotary piston 3 and each on a side of the respective planar seal 19 facing away from the sealing surface 20 opening into the respective planar seal receiving channel 18 pressure feed-through lines 22 are in pressure-transmitting connection with the respective planar seal receiving channel 18 . This is explained later, in particular with reference to FIGS. 7, 8 and 11-13.
- Fig. 2 is a side view of the assembled rotary compressor 1 of this first embodiment, with the sectional plane A-A being indicated. 3 to 6 each show somewhat simplified sectional drawings of this
- Sectional plane AA different positions of the rotary piston 3 during a revolution around the drive shaft 30 or its longitudinal axis being shown to explain the mode of operation of the rotary piston compressor 1 .
- the arrow 42 points the direction of rotation of the rotary piston 3 in the working chamber 10.
- Seen sealing surfaces 8 and 9 of the housing cover 5 and 6 parallel sectional plane, is completely trochoidal in this embodiment.
- the rotary piston 3 has two corner areas 25 .
- a radial seal 26 is located in each of these corner regions 25 for sealing the rotary piston 3 against the side wall surface 7 of the housing side wall 4.
- the piston base surfaces 15 and 16 are each delimited in the region between two of the corner regions 25 of the rotary piston 3 by a boundary line 27, which forms an envelope a family of curves made up of trochoids.
- the rotary piston 3 divides the working chamber 10 into a low-pressure side 40 and a high-pressure side 41 by means of its corner areas 25 and the radial seals 26 arranged there. On the high-pressure side 41, the volume of which decreases with increasing rotation of the rotary piston 3, the previously sucked-in gas is compressed or compressed, so that when the rotary piston 3 rotates, the gas pressure on the
- High-pressure side 41 increases continuously. If the desired gas pressure or the desired compression of the gas is reached on the high-pressure side 41, it opens
- Overpressure outlet valve 14 so that the compressed gas can flow out or be derived from the working chamber 10 via the gas outlet 13.
- a corresponding setting or selection of a corresponding pressure relief valve 14 can be set to how much the gas is compressed by the rotary piston compressor 1 before it is over the gas outlet 13 flows out.
- the degree to which the gas is compressed in the rotary piston compressor 1 can be defined or set. 3 to 6 show four different examples
- FIGS. 3 to 6 illustrate the gas that is still to be compressed and is flowing in or sucked in via the gas inlet 12 .
- the arrows 44 illustrate the already compressed gas flowing out via the gas outlet 13 .
- Fig. 7 now shows a vertical section through the rotary piston compressor 1 of this first
- FIG. 8 shows the area D from FIG. 7 enlarged.
- the pressure feedthrough lines 22 are tubular. Here, specifically, they are designed as a sequence of bores that open into one another in the interior of the rotary piston 3 .
- the lateral surface openings 21 are arranged in the piston lateral surface 17 at a distance from the piston base surfaces 15 and 16 .
- the arrow 47 representing the direction of pressurization illustrates how the gas present under the corresponding pressure in the working chamber 10 pressurizes the planar seal 19 on the side opposite the sealing surface 20 through the lateral surface opening 21 and the pressure lead-through line 22, whereby the sealing surface 20 against the respective planar sealing surface 8 or 9 is pressed. This ensures that the gas pressure in the working chamber 10 is used to press the planar seal 19 with its sealing surface 20 against the corresponding planar sealing surface 8 and 9 . A very good seal can hereby be achieved even at very high pressures in the working space 10 . Im shown
- a cap 24 is located in the area of the opening 23 of the pressure feedthrough line 22 in the planar seal receiving channel 18, which cap covers the pressure feedthrough line 22.
- This cap 24 is designed in such a way that it does not stand in the way of pressure transmission. With a corresponding pressure build-up in the
- Pressure feed-through line 22 can, conveniently past the cap 24, gas into the planar seal-receiving channel 18 on the opposite side of the sealing surface 20 of the Planar seal 19 flow in order to press the planar seal 19 accordingly with its sealing surface 20 against the respective planar sealing surface 8 to 9.
- the cap 24 can in principle also be omitted. However, if the planar seal 19, as implemented here, is injected as an injection molded part into the respective planar seal receiving channel 18 or is pressed into the respective planar seal receiving channel 18 as a 3D printed part, the cap 24 prevents the formation or
- Fig. 9 shows a section through the rotary piston compressor 1 of this first
- FIG. 10 shows the area E from FIG. 9 enlarged.
- an elastic element 28 pointing towards the rotary piston 3 is formed on the radial seal 26 and presses the radial seal 26 against the side wall surface 7 of the housing side wall 4 .
- planar seals 19 also press the respective radial seal 26 against the side wall surface 7 by means of their contact surfaces 57 .
- the elastic element 28 formed on the radial seal surface 49 onto the radial seal 26 is designed as a type of leaf spring that is cut out.
- Fig. 17 shows a variant of this, in which the elastic element 28 as a corresponding bulge on the, the
- Radial seal surface 49 opposite side of the radial seal 26 is formed.
- the contact surfaces 57 of the planar seal 19 for pressing the respective radial seal 26 against the side wall surface 7 are advantageously designed as an inclined surface 45.
- the radial seal 26 advantageously has corresponding inclined surfaces 46 on which the contact surfaces 57 or inclined surfaces 45 of the respective planar seal 19 act.
- FIG. 11 shows a perspective view of the rotary piston 3 with the planar seal 19 arranged on the piston base 15 in the planar seal receiving channel 18.
- the lateral surface openings 21 provided according to the invention are arranged in the piston lateral surface 17 .
- section FF which is shown in FIG. 12, the pressure-transmitting connection according to the invention between the lateral surface openings 21 and the planar seal receiving channel 18 via one of the pressure feed-through lines 22 is shown once again.
- the illustration according to FIG. 12 corresponds to the illustration according to FIG. 8 already discussed, so that reference can essentially be made to what was said above.
- the planar seal 19 is injected as an injection molded part in the respective planar seal receiving channel 18.
- the planar seal 19 could just as well be designed as a 3D printed part or as a compression molded part in the planar seal receiving channel 18, as already explained above.
- planar seal 19 is prefabricated as an insert and as such has been inserted into the respective planar seal receiving channel 18 .
- the web 58 of this planar seal 19 ensures a corresponding guidance when the planar seal 19 according to the invention in the pressurization direction 47 through the lateral surface opening 21, the pressure feed-through line 22 and the planar seal receiving channel 18 on the of the
- FIG. 14 shows an exploded view of the rotary piston 3, in which the planar seals 19 and the radial seals 26 are shown detached from the rotary piston 3. In Fig. 14 is also easy to see that the planar seals 19, which in one of the
- Planar seal receiving channels 18 are arranged, are preferably made in one piece. In Fig. 14 one can also see the openings 23 of the pressure lead-through lines 22 in the planar seal receiving channel 18. 15 is a side view of one of the planar seals 19 from the direction 59 shown in FIG 19 in the respective corner regions 25 of the rotary piston 3 on their side facing away from the respective sealing surface 20 against the planar seal receiving channel 18 accommodating them.
- This type of sealing at this point could of course also be done differently, for example by gluing, clamping or the like.
- this sealing is particularly preferably effected by arranging the mentioned sealing web 48 in a sealing web receiving groove 50 which is located in the respective corner area 25 as a depression in the planar seal receiving channel 18 .
- FIGS. 18 to 21 reference is made to FIGS. 18 to 21. figure
- FIG. 18 shows a top view of one of the piston bases 15 of the rotary piston 3 and the cutting lines or cutting planes GG and HH.
- the cutting line GG lies in the area of the sealing web receiving groove 50, as can be seen in FIG.
- the rotary piston 3 is cut in the area of the radial seal receiving channel 51 into which the radial seal 26 is inserted.
- FIG. 21 shows the same section as FIG. 19, although in FIG. 19 a planar seal 19 is arranged in the respective planar seal receiving channel 18 . You can also see here how the sealing web 48 of the respective planar seal
- planar seals 19 and also the radial seals 26 advantageously consist of a polymer, preferably with a dry lubricant and/or reinforcement fibers.
- the housing side wall 4 and the housing covers 5 and 6 advantageously have a base body made of an aluminum alloy or cast iron.
- a coating 29 is advantageously applied to the respective base body. This is also preferably the case in this first exemplary embodiment. With regard to the details and preferred embodiment variants of such a coating 29, reference is made to the explanations already presented at the outset.
- FIG. 22 and 23 show, again in an exploded view, a second exemplary embodiment of a rotary piston compressor 1 according to the invention, which is largely the same as the first exemplary embodiment, so that only the differences will be discussed here.
- the main difference is that a translation of 2:3 was realized here. Accordingly, the rotary piston 3 has this
- Embodiment also three corner areas 25.
- the overpressure outlet valves 14 are adapted accordingly, as is the shape of the side wall surface 7 and the shape of the planar seal 19. Otherwise, however, what has been said above applies in an adapted form where necessary, so that further explanations on this are dispensed with. It is only pointed out that the internal toothing 33 shown in FIG. 22 was not shown in FIG. 23 either. In this exemplary embodiment, too, it is in any case the case that the boundary lines 27 of the piston base surfaces 15 and 16 running between the corner regions 25 have the shape of an envelope curve of a family of curves made up of trochoids.
- the side surface 7 of the housing wall 4 is in a to the planar sealing surfaces 8 and 9 the housing cover 5 and 6 seen parallel sectional plane, here also completely trochoid-shaped.
- the arrangement according to the invention of the lateral surface openings 21 and the pressure lead-through lines 22 in the rotary piston 3 corresponds to the first exemplary embodiment and does not have to be explained again.
- FIGS. 24 to 39 A third exemplary embodiment of a rotary piston compressor 1 according to the invention is shown in FIGS. 24 to 39. This is a variant with a transmission ratio of 7:6.
- the rotary piston 3 this is a variant with a transmission ratio of 7:6.
- the rotary piston compressor 1 thus has six corner areas 25.
- the areas of the piston jacket surface 17 lying between the corner areas 25 are in turn designed in such a way that they delimit the piston base areas 15 and 16
- Boundary lines 27 are each formed as an envelope of a family of curves from trochoids.
- the side wall surface 7 of the housing side wall 4 has trochoid arcs in a sectional plane 7 parallel to the planar sealing surfaces 8 and 9 of the housing covers 5 and 6 .
- the eccentric 11 on which the rotary piston 3 is rotatably mounted in the working chamber 10 is not rotated as in the first two exemplary embodiments, but rather is rigid in the outer shell 39 of the rotary piston compressor 1 is arranged.
- the rotary piston 3 is rotated together with the working housing 2 and thus together with the housing side wall 4 and the two housing covers 5 and 6 about an axis of rotation 60 running through the eccentric 11, while the eccentric 11 remains stationary.
- the rotary piston compressor 1 of this third exemplary embodiment has a rotor 53 which is connected in a torque-proof manner to the working housing 2 by means of screws 37 and nuts 38 and which interacts with a stator 54 rigidly connected to the outer shell 39 of the rotary piston compressor 1 .
- the rotor 53 and the stator 54 form a drive motor which rotates the working housing 2 with the rotary piston 3 mounted on the eccentric 11 in the working chamber 10 of the working housing 2 .
- a further difference between the third exemplary embodiment and the two exemplary embodiments described above is that the gas inlet 12 and the gas outlet 13 in this third exemplary embodiment pass through the eccentric 11 and not through the housing wall 4 as in the exemplary embodiments described first.
- overflow openings 55 penetrating the piston jacket surface 17 are also provided in the rotary piston 3 . The gas can flow through these overflow openings 55 from the gas inlet 12 in the eccentric 11 into the corresponding sections of the
- Penetrate working space 10 and be transported from there via the gas outlet 13 again in compressed form.
- Embodiment in a valve cover 52 which sits on the outside of the outer shell 39 of the rotary piston compressor 1 and leads both the gas inlet 12 and the gas outlet 13 into the rotary piston compressor 1 and leads out of it.
- Planar seal receiving channels 18 of the piston bases 15 and 16 arranged planar seals 19, for pressing their sealing surfaces 20 to the planar sealing surfaces 8 and 9 of the housing covers 5 and 6.
- FIG. 25 shows the rotary piston compressor 1 of the third embodiment shown in an exploded view in FIG. 24 in a side view.
- the sectional plane II is drawn in in FIG. 26 to 32 each show sections in the section plane II for different snapshots during operation of the rotary piston compressor 1 and thus during the rotation of the working housing 2 together with the rotary piston 3 about the corresponding axis of rotation 60 running through the eccentric 11, which is shown in Figs. 24 and 25 is drawn.
- a point 61 is drawn on the rotary piston 3 in FIGS. This is only an illustrative aid, by means of which the instantaneous position of the rotary piston 3 can be better understood in the various representations according to FIGS. 26 to 32.
- FIGS. 26 to 32 thus illustrate various intermediate stations during a revolution of the working housing 2 and the rotary piston 3 about the axis of rotation 60.
- the gas inlet 12 and the gas outlet 13 are clearly visible in the eccentric 11.
- the arrows 43 each illustrate the over the Gas inlet 12 and the corresponding overflow openings 55 in the respective, momentarily acting as low-pressure side 40, partial areas of the working chamber 10 flowing gas that is still to be compressed.
- the Arrows 44 illustrate the already compressed gas that has been pressed into the gas outlet 13 from the corresponding high-pressure side 41 of the working chamber 10 . If one follows the position of the rotary piston 3 via FIGS
- FIG. 33 shows a plan view of the third exemplary embodiment of the rotary piston compressor 1 according to the invention.
- the sectional planes JJ and KK are also drawn in in FIG. 34 shows the section in section plane JJ. In this FIG.
- FIG. 35 shows the section along the sectional plane KK from FIG.
- the corresponding detail L from FIG. 35 is shown enlarged in FIG.
- planar seal receiving channel 18 in pressure-transmitting connection.
- FIG. 36 the direction in which pressure is applied to the planar seal 19 is again illustrated by the arrow 47 on its side facing away from the sealing surface 20 .
- the gas present under pressure in the working chamber 10 can also flow through the lateral surface opening 21 and through in this third exemplary embodiment
- the pressure feed-through line 22 passed through the rotary piston 3 acts on the side of the planar seal 19 opposite the sealing surface 20 in order to press the planar seal 19 with its sealing surface 20 against the corresponding planar sealing surface 8 or 9 of the corresponding housing cover 5 or 6.
- cap 24 the function of which has already been explained.
- this cap 24 can also be omitted here.
- FIG. 37 shows a perspective view of the rotary piston 3 of this exemplary embodiment of the rotary piston compressor 1. This perspective view clearly shows how FIG
- Piston base 15 of the planar seal receiving channel 18 is formed and the planar seal 19 is arranged therein.
- the overflow openings 55 and the lateral surface openings 21 arranged in the piston lateral surface 17 are also clearly visible. In FIG. 38 one can therefore also see the openings 23 in the planar seal receiving channel 18, which are connected to the corresponding lateral surface openings 21 via the corresponding pressure lead-through lines 22.
- the planar seals 19 of this exemplary embodiment each have sealing corner regions 56 with correspondingly rounded contact surfaces 57. These rounded contact surfaces 57 seal against the corresponding rounded corner sections 62 of the side wall surface 7 of the housing side wall 4 when the respective corner area 25 of the rotary piston 3 engages in the corresponding corner section 62 of the housing side wall 4 .
- the corner portions 62 are identified as such in FIG. When the respective sealing corner area 56 rolls off in the corner section 62, the sealing corner area 56 with its rounded contact surface 57 always rests in a sealing manner at at least one point between the two end points X and Y shown in Fig. 39 on the corresponding corner section 62 and thus on the side wall surface 7.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/AT2021/000015 WO2023283660A1 (de) | 2021-07-14 | 2021-07-14 | Rotationskolbenverdichter |
JP2024502108A JP2024524706A (ja) | 2021-07-14 | 2021-07-14 | ロータリピストンコンプレッサ |
EP21749060.6A EP4370798A1 (de) | 2021-07-14 | 2021-07-14 | Rotationskolbenverdichter |
KR1020247003947A KR20240032076A (ko) | 2021-07-14 | 2021-07-14 | 로터리 피스톤 압축기 |
CN202180100530.1A CN117730206A (zh) | 2021-07-14 | 2021-07-14 | 旋转活塞式压缩机 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/AT2021/000015 WO2023283660A1 (de) | 2021-07-14 | 2021-07-14 | Rotationskolbenverdichter |
Publications (1)
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WO2023283660A1 true WO2023283660A1 (de) | 2023-01-19 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/AT2021/000015 WO2023283660A1 (de) | 2021-07-14 | 2021-07-14 | Rotationskolbenverdichter |
Country Status (5)
Country | Link |
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EP (1) | EP4370798A1 (de) |
JP (1) | JP2024524706A (de) |
KR (1) | KR20240032076A (de) |
CN (1) | CN117730206A (de) |
WO (1) | WO2023283660A1 (de) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3885799A (en) * | 1972-12-05 | 1975-05-27 | William H Bibbens | Sealing assembly |
DE2402558A1 (de) * | 1974-01-19 | 1975-07-24 | Borsig Gmbh | Dichtsystem fuer rotationskolbenverdichter |
US4105375A (en) | 1974-01-17 | 1978-08-08 | Borsig Gmbh | Rotary piston compressor |
US4118157A (en) | 1975-01-14 | 1978-10-03 | The Bendix Corporation | Rotary compressor |
EP1726779A1 (de) * | 2004-03-16 | 2006-11-29 | Daikin Industries, Ltd. | Rotationsexpansionsmaschine |
CN105179234A (zh) * | 2015-09-29 | 2015-12-23 | 中国石油天然气股份有限公司 | 气液混输装置 |
WO2020159394A1 (ru) | 2019-01-28 | 2020-08-06 | Общество С Ограниченной Ответственностью "Роторно-Поршневые Компрессоры Инжиниринг" | Система уплотнения роторно-поршневого компрессора |
-
2021
- 2021-07-14 EP EP21749060.6A patent/EP4370798A1/de active Pending
- 2021-07-14 WO PCT/AT2021/000015 patent/WO2023283660A1/de active Application Filing
- 2021-07-14 KR KR1020247003947A patent/KR20240032076A/ko active Search and Examination
- 2021-07-14 JP JP2024502108A patent/JP2024524706A/ja active Pending
- 2021-07-14 CN CN202180100530.1A patent/CN117730206A/zh active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3885799A (en) * | 1972-12-05 | 1975-05-27 | William H Bibbens | Sealing assembly |
US4105375A (en) | 1974-01-17 | 1978-08-08 | Borsig Gmbh | Rotary piston compressor |
DE2402558A1 (de) * | 1974-01-19 | 1975-07-24 | Borsig Gmbh | Dichtsystem fuer rotationskolbenverdichter |
US4118157A (en) | 1975-01-14 | 1978-10-03 | The Bendix Corporation | Rotary compressor |
EP1726779A1 (de) * | 2004-03-16 | 2006-11-29 | Daikin Industries, Ltd. | Rotationsexpansionsmaschine |
CN105179234A (zh) * | 2015-09-29 | 2015-12-23 | 中国石油天然气股份有限公司 | 气液混输装置 |
WO2020159394A1 (ru) | 2019-01-28 | 2020-08-06 | Общество С Ограниченной Ответственностью "Роторно-Поршневые Компрессоры Инжиниринг" | Система уплотнения роторно-поршневого компрессора |
Also Published As
Publication number | Publication date |
---|---|
JP2024524706A (ja) | 2024-07-05 |
EP4370798A1 (de) | 2024-05-22 |
CN117730206A (zh) | 2024-03-19 |
KR20240032076A (ko) | 2024-03-08 |
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