EP3880963A1 - Hubkolbenmaschine, druckluftversorgungsanlage, fahrzeug und verfahren zur herstellung einer hubkolbenmaschine - Google Patents
Hubkolbenmaschine, druckluftversorgungsanlage, fahrzeug und verfahren zur herstellung einer hubkolbenmaschineInfo
- Publication number
- EP3880963A1 EP3880963A1 EP19795494.4A EP19795494A EP3880963A1 EP 3880963 A1 EP3880963 A1 EP 3880963A1 EP 19795494 A EP19795494 A EP 19795494A EP 3880963 A1 EP3880963 A1 EP 3880963A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connecting rod
- coupling
- damping
- bearing
- bearing bush
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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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
- F04B39/0022—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons piston rods
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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
- F04B25/00—Multi-stage pumps
- F04B25/005—Multi-stage pumps with two cylinders
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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
- F04B27/005—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders with two cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/02—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders arranged oppositely relative to main shaft
-
- 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
- F04B27/0404—Details, component parts specially adapted for such pumps
- F04B27/0409—Pistons
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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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/01—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being mechanical
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
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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
- F04B39/0027—Pulsation and noise damping means
- F04B39/0044—Pulsation and noise damping means with vibration damping supports
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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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/001—Noise damping
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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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
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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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
- F04B53/145—Rod shock absorber
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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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
- F04B53/147—Mounting or detaching of piston rod
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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
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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
Definitions
- Reciprocating machine compressed air supply system, vehicle and method for producing a reciprocating machine
- the invention relates to a reciprocating piston machine, in particular a two-stage or multi-stage piston compressor, according to the preamble of claim 1.
- the invention further relates to a compressed air supply system, a Druckluftver supply system and a vehicle, in particular a car, with a reciprocating piston machine, in particular with a piston compressor, and a method for producing a reciprocating piston machine.
- a compressed air supply system is used in vehicles of all kinds, in particular for supplying compressed air to an air suspension system of a car or a commercial vehicle.
- Air suspension systems can also include crizregelungsein devices with which the distance between the vehicle axle and vehicle body can be adjusted.
- An air suspension system of a pneumatic compressed air supply system mentioned at the beginning comprises a number of air bellows pneumatically connected to a common line (gallery), which can increase the vehicle body with increasing filling and lower with decreasing filling.
- a common line such a system is used for example in an off-road vehicle and a sport utility vehicle (SUV) or a utility or passenger transport vehicle.
- SUV sport utility vehicle
- the compressed air supply system To ensure long-term operation of the compressed air supply system, it has an air dryer with which the compressed air can be dried.
- An air dryer has a desiccant, usually a granulate tion through which the compressed air can flow, so that the granulate bed can absorb moisture at a comparatively high pressure in the compressed air by adsorption. It has often proven useful to accommodate the dry granules in a dryer cartridge that has a dryer bed for guiding a compressed air flow.
- a compressed air supply system for use in a pneumatic compressed air supply system with a pneumatic system is operated with compressed air from a compressed air supply, for example at a pressure level of 5 bar to 20 bar.
- the compressed air is made available to the compressed air supply by means of an air compressor (compressor), in the present case with a reciprocating piston machine, preferably with a two-stage or multi-stage piston compressor.
- the compressed air supply supplied by the air compressor is pneumatically connected on the one hand to supply the pneumatic system with a compressed air connection and on the other hand pneumatically connected to a ventilation connection.
- a vent valve arrangement Via a vent valve arrangement, the compressed air supply system and / or the pneumatic system can be vented to the vent connection by releasing air.
- the reciprocating piston machine in the air compressor (compressor) for the compressed air supply is driven regularly by a drive motor, the drive power of which is passed on to several pistons via a crankshaft and several connecting rods.
- the reciprocating machine in the air compressor (compressor) of the compressed air supply can also be driven, for example, with a belt drive.
- TWIN piston compressors have proven their worth; ie two-stage piston compressors, the two pistons of which are driven by two connecting rods assigned to each of them, which in turn are exactly along a cylinder axis, which are preferably aligned exactly parallel and center-symmetrical to cylinder running surfaces in the cylinder displacement for the piston.
- such a compressor or two-stage or multi-stage compressor may develop increasing operating noises during operation, which - as it turns out - are largely due to structure-borne noise transmission by the connecting rod drive, among other things. may be caused in the drive motor of the compressor or its housing. It is desirable to implement improved acoustics and a reliable connecting rod drive in a compressor in the form of the aforementioned reciprocating piston machine. In particular, this should also be sufficient for a particularly low noise level in the car sector.
- WO 2017/137141 A1 discloses a reciprocating piston machine according to the Oberbe handle of claim 1.
- the reciprocating piston machine known from WO 2017/137141 A1 can still be improved.
- the invention comes in, the task of which is to provide a reciprocating machine, in particular a two-stage or multi-stage piston compressor, preferably a TWIN compressor, and a compressed air supply system for operating a pneumatic system with a compressed air flow, by means of which the acoustics are further improved and a connecting rod drive that is nevertheless reliable can be realized in a piston compressor.
- a connecting rod drive that is nevertheless reliable can be realized in a piston compressor.
- This should also be suitable for noise level requirements in the car sector.
- structure-borne missions of a connecting rod drive in adjacent, radiating components, such as an electric motor, crank mechanism or similar components of an air compressor (compressor) are to be further reduced.
- the reciprocating piston machine should be able to be manufactured inexpensively.
- the object of the invention is also to specify a corresponding compressed air supply system and a vehicle with the compressed air supply system, in particular for an air suspension system. Further an inexpensive method for producing the reciprocating piston machine is to be provided.
- the object with regard to the reciprocating piston machine is achieved with a reciprocating machine, in particular a two-stage or multi-stage piston compressor, of claim 1.
- first connecting rod designed to deflect a first piston with a connecting rod eye, in particular wherein the first connecting rod is a drive connecting rod
- a second connecting rod designed to deflect a second piston with at least one further connecting rod eye, in particular wherein the second connecting rod is a towing connecting rod and
- the damping element fills the damping annular space in such a way that a positive-locking ball joint is created between the coupling bearing element and the inner surface of the connecting rod eye of the connecting rod eye.
- the reciprocating piston machine enables lateral tensions to be reduced when the connecting rods are tilted and the acoustics to be improved.
- the damping element can be, for example, an elastically damping elastomer element or the like. It can also be arranged in the damping annulus several Dämpfungsele elements.
- the coupling element can be, for example, a bearing pin or the like.
- the coupling bearing element can have a connecting rod bearing.
- the connecting rod bearing can have a plain bearing or a roller bearing, in particular a needle bearing, a ball bearing or a barrel bearing.
- the first piston can be part of the first connecting rod or connected to the first connecting rod.
- the second piston can be part of the second connecting rod or connected to the second connecting rod.
- the pistons can, for example, each be held by means of a piston holder, be firmly connected to the respective connecting rod, or be integrally formed on the respective connecting rod.
- the second connecting rod eye can have a further connecting rod eye, two further connecting rod eyes, three further connecting rod eyes, or more additional connecting rod eyes.
- the other connecting rod eyes can be aligned along a coupling element axis of the coupling element, which extends through the connecting rod eye and the at least one further connecting rod eye and along the coupling element.
- the first connecting rod and the second connecting rod are rotatable relative to one another about the coupling element axis.
- damping elements can also be arranged between the coupling element and further connecting rod inner surfaces of the further connecting rod eyes.
- the damping elements are preferably arranged in a respective further damping ring space between the respective further coupling bearing element and the respective further connecting rod inner surface of the further connecting rod eyes and fill the respective further damping ring space in such a way that a spherical articulation between the coupling element and the connecting rods producing a positive fit arises.
- a compressed air supply system for operating a pneumatic system in particular an air suspension system of a vehicle, preferably a car, with a compressed air flow, has:
- an air dryer arrangement in a main pneumatic line which pneumatically connects a compressed air supply from an air compressor and a compressed air connection to the pneumatic system, and
- An air compressor with a reciprocating piston machine in particular a two-stage or multi-stage piston compressor, preferably a TWIN compressor, in particular claims 1 to 19, is connected to the compressed air supply.
- the object regarding the compressed air supply system is achieved with a compressed air supply system of claim 21.
- the invention also leads to a vehicle, in particular a car vehicle, of claim 22.
- a truck vehicle can also be provided, in particular a truck compressor can be provided for air conditioning.
- a compressed air supply system with a pneumatic system and with a compressed air supply system according to claim 20 is used to operate the pneumatic system with a compressed air flow, in particular an air suspension system of a vehicle, preferably a car, the main pneumatic line supplying compressed air from an air compressor with a reciprocating machine, in particular a or multi-stage piston compressor, preferably TWIN compressor, according to one of claims 1 to 19 and ei NEN compressed air connection to the pneumatic system pneumatically connects.
- a vehicle in particular a passenger car, is provided with a pneumatic system, in particular an air spring system, and a compressed air supply system for operating the pneumatic system with a compressed air flow.
- the invention also leads to a method of claim 23 for the manufacture of a reciprocating piston machine, in particular a two-stage or multi-stage piston compressor.
- the reciprocating piston machine to be manufactured has
- first connecting rod designed to deflect a first piston with a connecting rod eye, in particular wherein the first connecting rod is a drive connecting rod
- a second connecting rod designed to deflect a second piston with at least one further connecting rod eye, in particular wherein the second connecting rod is a towing connecting rod and
- a coupling bearing element is arranged between the coupling element and a connecting rod eye inner surface of the connecting rod eye, and an elastically damping damping element is arranged in a damping annular space between the coupling bearing element and the connecting rod eye inner surface of the connecting rod eye.
- the damping annulus is filled with the damping element in such a way that a positive locking spherical articulation is generated between the coupling element and the connecting rod inner surface of the connecting rod eye.
- the invention is based on the consideration that, depending on the required dynamics and pressure load in an air compressor, a two- or multi-stage compressor, in particular a two-stage TWIN compressor or an other reciprocating piston machine, increasingly develops operating noises during operation, which - as it turns out - can be caused primarily by structure-borne noise transmission from the connecting rod drive into the compressor drive motor.
- a two- or multi-stage compressor in particular a two-stage TWIN compressor or an other reciprocating piston machine
- operating noises are partly caused by connecting rod bearing play that is required in the prior art.
- the connecting rod bearing play between a needle bearing inner diameter of a Nadella ger and a coupling element, in particular bearing pin, has a strong influence on the acoustic behavior.
- a respective current bearing inner diameter is measured in production before assembly and, depending on the measured value, a corresponding bearing pin with the appropriate diameter is selected and installed. Due to the existing tolerances in one direction of the motor axis, the connecting rods may be subject to lateral tension, which has a negative impact on the acoustic behavior. There is also a risk of the connecting rods hitting each other.
- the connecting rod bearing clearances of needle bearings are attempted to be compensated for by metallic hard stops, which, however, lead to high acoustic emissions.
- a plain bearing especially made of plastic, can compensate for the hard stops of the connecting rod bearing play due to its softer material properties.
- plain bearings wear out over time, so that with longer use of the plain bearings there is a relatively large increase in connecting rod bearings, which in turn leads to an increase in noise.
- Plastic plain bearings in particular have good damping behavior, but are sensitive to wear at high temperatures and show a high running-in behavior, which leads to an increase in connecting rod bearing play. With the service life of the plastic plain bearings, this leads to an increase in acoustic emissions.
- Rolling bearings on the other hand, generally have poor damping behavior, since in this case typically steel meets steel.
- a reciprocating piston machine in which a damping element is used to dampen a coupling bearing element, makes it possible to implement improved acoustics in a compressor; with strong leadership, however, it can There is tension between the connecting rods which can have a negative effect on the acoustic behavior. If the guidance is too weak, deflection may be too high. No small dead spaces can be realized either.
- the invention has now recognized that by skillfully filling the damping annulus with the damping element, a positive locking generating spherical articulation can be achieved with improved acoustics and a reliable connecting rod drive in a compressor; also with a low noise level that is particularly acceptable for a car sector.
- the concept of the present invention is also preferred for a commercial vehicle or passenger transport vehicle, especially if the compressed air supply system is designed for comparatively high pressure amplitudes.
- the invention can also find application in the truck sector.
- the damping properties of the damping element can reduce the body's sound excitation.
- An energy transfer between the connecting rod, the coupling element and the coupling bearing element can be reduced by means of the damping element in order to reduce the transmission of noise.
- the damping element enables the connecting rods to rotate freely with respect to one another due to the positive-locking spherical joints. Furthermore, a largely tolerance-free change in the reversal of movement of the connecting rods is possible. By filling the damping annulus, the piston length and thus a dead space can also be set.
- a load on the edges of the coupling bearing element can be reduced, since tilting and interlocking of the connecting rods can be better compensated for by the damping element and in particular the form-fitting spherical articulation. This in turn reduces wear. Correction of skewing and / or shaft bending is also possible using the damping element.
- the use of the damping element for damping the coupling bearing element also makes it possible to compensate for temperature-related changes in the components, in particular the connecting rod and the coupling element, as a result of which less Storage tolerances, especially in high and low temperature applications, are made possible. In particular, a material expansion in the radial direction can be compensated for when the temperature changes.
- the bearing load can be reduced by reducing the structure-borne noise emissions of the excited axes and the rigidity between the connecting rods or connecting rod assemblies.
- the invention enables in particular an optimization of the acoustic behavior, in particular of a two-stage TWIN compressor, since the damping element is largely freely parameterizable with regard to its design criteria.
- the selection of the material, i.e. the hardness, and the geometry of the damping element, i.e. the diameter, the width, the wall thickness and / or similar parameters can be freely parameterized as far as possible, namely under the boundary condition that a positive-locking spherical articulation is achieved.
- This can include lead to a reduction in the development of noise, in particular the initial level, the level spread and the level increase over the operating time.
- the largely free parameterizability makes it possible to adapt the damping element to the existing operating conditions.
- the reciprocating machine according to the invention is characterized in that the positive-locking spherical articulation between the coupling bearing element and the connecting rod inner surface is produced in that at least one of the damping element surfaces of the damping element lying on the coupling bearing element and the connecting rod inner surface is pressed in.
- the damping element can take on various shapes that enable a spherical articulation between the coupling bearing element and the inner surface of the connecting rod to produce a positive connection. Little is particularly preferred at least one of the damping element surfaces abutting the coupling bearing element and the connecting rod inner surface is pressed in by the coupling bearing element and / or the connecting rod inner surface.
- the coupling bearing element and the connecting rod inner surface can be shaped in such a way that they press in the damping element.
- the damping element surface bearing against the coupling bearing element can be pressed in by the coupling bearing element and the damping element surface resting on the connecting rod inner surface can be pressed in by the connecting rod inner surface.
- the damping element fills the damping annulus in such a way that holding forces generated by the positive connection are greater than shear forces acting on the damping element during operation of the reciprocating piston machine.
- the positive locking generated by filling the damping annulus with the damping element makes it possible to establish a firm connection without fastening the damping element to the coupling bearing element and / or the connecting rod inner surface.
- the coupling bearing element preferably has a bearing bush.
- the bearing bush has a bearing bush outer surface opposite the inner surface of the connecting rod eye.
- the damping element can be arranged in the damping annulus between the connecting rod inner surface and the bearing bush outer surface.
- the bearing bush can for example be a plain bearing bush, in particular a metal bush or the like. The bearing bush enables stable storage.
- the inner surface of the connecting rod eye and the outer surface of the bearing bush each have at least one curved, curved shape in the direction of the opposite surface, the respective of the opposite surfaces encircle the surface section; in other words, the connecting rod eyes Surface and the outer surface of the bearing bush in the direction of each other are convexly curved.
- the damping element surfaces of the damping element which bear against the coupling bearing element and the inner surface of the connecting rod eye are pressed in by the inner surface of the connecting rod eye and the outer surface of the bearing bushing in such a way that the damping element has a biconcave shape along the damping annular space.
- the inner surface of the connecting rod and the outer surface of the bearing bush are curved outwards.
- the curvature can have various shapes, which can be optimized, for example, to optimize a rolling characteristic.
- the connecting rod inner surface and the outer surface of the bearing bush can also have several curvatures which are shaped in such a way that they improve the rolling characteristics. This enables the rolling behavior to be improved.
- the connecting rod eye has a web which runs centrally along the inner surface of the connecting rod and extends in the direction of the bearing outer surface. This configuration enables light to produce a positive locking ball joint.
- the bearing bush can have a web running centrally along the outer surface of the bearing bush and extending in the direction of the inner surface of the connecting rod eyes.
- the bearing bush particularly preferably has a smaller outside diameter than a smallest inside diameter of the connecting rod eye produced by the web.
- a holding force generated by the positive connection can be set via the difference in the outer diameter of the bearing bush and the smallest inner diameter of the connecting rod eye.
- a slight difference between the outer diameter of the bearing bush and the smallest inner diameter of the connecting rod eye enables a positive fit to be generated, in which very high shear forces are required in the damping element in order to loosen the connection between the bearing bush, damping element and inner surface of the connecting rod eye.
- the holding forces that are generated make it possible to vulcanize the To do without the damping element on the bearing bush and the connecting rod inner surface.
- the outer diameter of the bearing bush can, for example, be between 0.1% and 10% smaller than the smallest inner diameter of the connecting rod eye.
- the bearing bush has a groove which runs centrally along the outer surface of the bearing bush and which extends away from the inner surface of the connecting rod.
- the groove can have a greater width and a greater height than the web. The groove enables a higher holding force to be generated and the flexibility to be increased.
- the connecting rod eye can have a groove running centrally along the inner surface of the connecting rod eye and extending away from the outer surface of the bearing bush.
- the bearing bush is preferably coated with a material with a low friction coefficient.
- the bearing bush can for example be coated with poly tetrafluoroethylene (PTFE) or the like.
- PTFE poly tetrafluoroethylene
- the coated bearing bush can be coated on its end faces. This enables the coated bearing bush to be used as a thrust washer in the event of large misalignments.
- the Lagerbüch se can be completely coated in a drum process. This enables light, inexpensive manufacture.
- the damping element is particularly preferably injected and vulcanized into the damping annulus.
- the injection can take place under pressure and heat.
- the Koppella gerelement can be arranged and adjusted in advance in the connecting rod eye. This makes it possible to position the coupling bearing element precisely and thus to adjust the lengths and position dimensions of the pistons. A dead space can be set by adjusting the piston length.
- the damping element need not be vulcanized onto the inner surface of the connecting rod eye and / or onto the outer surface of the bearing bush.
- the damping element is not vulcanized onto the inner surface of the connecting rod eye and / or onto the outer surface of the bearing bush.
- the damping element can either not be vulcanized onto the inner surface of the connecting rod or onto the outer surface of the bearing bush or only not onto one of the two surfaces. This enables an adhesion promoter to be reduced or omitted. Furthermore, the reciprocating piston machine can be manufactured in fewer manufacturing steps. This enables a cost reduction for the manufacture of the reciprocating machine.
- the damping element, the connecting rod inner surface and the coupling bearing element are particularly preferably shaped such that together they form a ball joint-like bearing. This makes it possible, by coordinating the shapes of the damping element, the connecting rod inner surface and the coupling element, to produce a positive locking ball joint.
- the connecting rod eye of the first connecting rod is arranged between two of the further connecting rod eyes of the second connecting rod and the coupling element extends through the three connecting rod eyes.
- the second connecting rod can partially enclose the first connecting rod.
- the second connecting rod can be formed in the form of a fork with two prongs, for example, and the first connecting rod in the form of a rod which is arranged between the two prongs of the fork.
- one of the two further connecting rod eyes is arranged in one of the tines and the other connecting rod eyes are arranged opposite one another along the coupling element axis.
- the reciprocating piston machine particularly preferably has a first cylinder and a second cylinder.
- the first piston is preferably assigned to the first cylinder and the second piston is preferably assigned to the second cylinder.
- the pistons are preferably deflected along a radially aligned cylinder axis in a respective cylinder displacement of the respective cylinder.
- the reciprocating piston machine has a crankshaft that can be driven during operation with a crankshaft journal that runs along a shaft axis of the crankshaft which is eccentric to an axially aligned engine axis and which is perpendicular to the radially aligned cylinder axis.
- the reciprocating piston machine preferably has a drive shaft coupling aligned along the axially aligned motor axis, which is designed to couple a drive shaft to drive the cure belwelle.
- the first connecting rod preferably runs along a first connecting rod axis running parallel to the radially oriented cylinder axis and the second connecting rod runs along a second connecting rod axis running parallel to the radially oriented cylinder axis.
- the cylinder axis is aligned essentially symmetrically to cylinder running surfaces for the pistons in the cylinder displacement of the at least one cylinder.
- a cylinder axis with cylinder displacement spaces aligned with it is to be understood in particular that the cylinder running surfaces on the cylinder stroke spaces of a cylinder for the piston are exactly parallel and symmetrical to the cylinder axis.
- the damping element completely fills the damping annulus radially between the coupling bearing element and the connecting rod inner surface.
- the damping element can also completely the damping annulus in the axial direction, i.e. in a direction parallel to the motor axis.
- the first connecting rod in particular as a drive connecting rod
- the second connecting rod in particular as a towed connecting rod
- a direct bearing is to be understood to mean that the connecting rod is moved directly through the crankshaft journal via the crankshaft bearing element.
- the second connecting rod can be indirectly supported on the crankshaft journal by means of the coupling bearing element and the coupling element.
- the first connecting rod can be moved directly by means of the crankshaft journal
- the second connecting rod can be moved indirectly by means of the crankshaft journal, in particular by means of the first connecting rod.
- at least the second connecting rod as a drag connecting rod can be movable from the first connecting rod as a drive connecting rod.
- the connecting rods are designed such that a maximum deflection angle of the deflection of the connecting rods between the first connecting rod axis and the second connecting rod axis in the direction of a deflection axis running perpendicular to the cylinder axis and perpendicular to the motor axis is at most 14 °.
- the maximum deflection angle can be, for example, at most 10 °, at most 8 °, preferably 7 °.
- the connecting rods can be designed such that when a higher deflection angle than the maximum deflection angle occurs, the damping element dampens the deflection in such a way that the connecting rods are prevented from hitting each other.
- the first piston is held on the first connecting rod by means of a piston holder
- the second connecting rod is connected to the first connecting rod by means of the coupling bearing element and the coupling element
- the second piston is formed on the second connecting rod.
- the reciprocating piston machine is designed as a two-stage compressor with a first and second compressor stage, in particular as a TWIN compressor.
- the first connecting rod of the second, in particular (high-pressure) compressor stage is particularly preferably formed, and / or the second connecting rod of the first, in particular (low-pressure) compressor stage is formed, and the second connecting rod is mounted directly on the first connecting rod by means of the coupling bearing element and the coupling element.
- the damping element has no sliding surfaces.
- the damping annulus is filled with the damping element such that at least one of the elements on the coupling bearing element and the connecting rod inner surface of the damping element surface of the damping element is pressed in.
- the damping annulus is particularly preferably filled with the damping element in such a way that the at least one of the damping element surfaces lying on the coupling bearing element and the connecting rod eye inner surface is pressed in by the coupling bearing element and / or the connecting rod eye inner surface.
- a web is injection molded onto the center of the connecting rod inner surface, which extends in the direction of the coupling element.
- the web serves to press in the damping element so that a positive locking generating spherical articulation can be generated.
- a bearing bush can be provided as part of the coupling bearing element and the bearing bush can be provided with a web which runs centrally along the outer surface of the bearing bush and extends in the direction of the inner surface of the connecting rod eye, in particular the web can be molded on.
- a bearing bush is particularly preferably provided as part of the coupling bearing element and the bearing bush is arranged in the connecting rod eye parallel to an axially aligned motor axis in such a way that a bearing bush outer surface of the bearing bush faces the inner surface of the connecting rod eye.
- the arrangement of the bearing bush in the connecting rod eye makes it possible to set the lengths and position dimensions of the pistons. This enables a dead space to be set.
- the bearing bush is preferably chosen such that the bearing bush has a smaller outside diameter than a smallest inside diameter of the connecting rod eye produced by the web.
- the bearing bush is provided with a groove running centrally along the outer surface of the bearing bush, which extends away from the inner surface of the connecting rod, before being arranged in the connecting rod eye.
- the groove particularly preferably has a greater width and a greater height than the web.
- a groove running in the middle along the inner surface of the connecting rod can be provided, in particular milled, which extends away from the outer surface of the bearing bush.
- the coupling bearing element has a bearing bush which is arranged in the connecting rod eye parallel to an axially aligned motor axis such that a bearing bush outer surface of the bearing bush is opposite the inner surface of the connecting rod eye.
- the inner surface of the connecting rod and the outer surface of the bearing bush are shaped in such a way that they each have at least one curved, curved surface section in the direction of the opposite surface, the surface section surrounding the respective one of the opposite surfaces; in other words, the inner surface of the connecting rod eye and the outer surface of the bearing bush are convexly curved toward one another.
- the damping element is particularly preferably arranged with a biconcave shape parallel to the axially aligned motor axis, which conforms to the connecting rod surface and the outer surface of the bearing bush along the damping annulus between the inner surface of the connecting rod and the outer surface of the bearing bush.
- the damping element is injected into the damping annulus and vulcanized.
- the damping element is particularly preferably not vulcanized onto the inner surface of the connecting rod eye and / or onto the coupling bearing element during vulcanization.
- the bearing bush is coated with a material with a low coefficient of friction, for example with PTFE or the like, before being arranged in the connecting rod eye, in particular in a drum method.
- One aspect of the invention relates to the use of the reciprocating piston machine, in particular the piston compressor in a compressor or air compressor for a car chassis control.
- Another aspect of the invention relates to the use of the reciprocating piston machine, in particular the piston compressor for air treatment for a truck.
- one aspect of the inven tion relates to the use of the reciprocating machine in other compressors such as, for example, an air conditioning compressor in vehicles such as cars and commercial vehicles, in electro-hydraulic power steering systems, and also in a compressor for ABS / EBS hydraulic pumps.
- One aspect of the invention also relates to the use of the invention in electric drives for vacuum pumps.
- the invention can also be used in general in piston connections.
- FIG. 1 a pneumatic circuit for an embodiment of a
- Compressed air supply system with connected pneumatic system in the form of an air suspension system for a vehicle, a piston compressor shown in detail D as part of an air compressor supplying the air suspension system with compressed air via an air dryer arrangement and a valve arrangement designed as an unblockable check valve which can be switched via a controllable magnetic valve;
- FIG. 2 for an air compressor, a reciprocating piston machine in the form of a two-stage piston compressor with a first connecting rod for a first piston of a second (high pressure) stage and a second connecting rod of a first (low pressure) stage and the first connecting rod with a connecting rod eye, with a coupling bearing element and a damping element in the form of an elastomer element, which was injected into a damping annular space between a connecting rod inner surface with a web and the coupling bearing element with a groove such that it fills the damping annular space in such a way that a positive locking spherical articulation is generated;
- FIG. 3 a section of the first connecting rod of the connecting rod shown in FIG. 2 shown
- FIG. 4 a section of the first connecting rod of the connecting rod shown in FIG. 2 shown lifting piston machine during the manufacturing process after arranging a bearing bush;
- FIG. 5 a section of the first connecting rod of the connecting rod shown in FIG. 2 lifting piston machine shown during the manufacturing process after the injection and vulcanization of the damping element
- FIG. 6 a section of a first connecting rod of a second embodiment, for example, of a reciprocating piston machine with a first connecting rod, the connecting rod end of which has an outwardly curved, arcuate connecting rod eye inner surface and in which a coupling bearing element with a bearing bush with an outwardly curved, curved outer bearing bush surface and a damping element are arranged in the form of a biconcave-shaped elastomer element; in other words, the inner surface of the connecting rod eye and the outer surface of the bearing bush are convexly curved towards one another;
- FIG. 7 an exemplary embodiment of a method for producing a
- FIG. 1 shows in detail D an air compressor with a reciprocating piston machine in the form of a two-stage piston compressor 400 with a first compressor stage 401 and a second compressor stage 402, which is driven by a motor 500 as the drive motor M.
- Such a piston compressor 400 is preferably used for pneumatic compressed air supply systems 1000, such as one in FIG. 1 is shown.
- FIG. 1 shows an embodiment of a pneumatic circuit diagram of a pneumatic compressed air supply system 1000 with a compressed air supply system 1001 with an air dryer arrangement 100 and a pneumatic system in the form of an air spring system 1002.
- the compressed air supply system 1001 is used to operate the air spring system 1002.
- the compressed air supply system 1001 has a compressed air supply 1 and a compressed air connection 2 to the air suspension system 1002.
- the compressed air supply 1 is formed with an air supply 0, an air filter 0.1 upstream of the air supply 0 and an air compressor arranged downstream of the air supply 0 via the air supply line 270 and driven by the motor 500.
- the air compressor is here as an example of a reciprocating machine in the form of a two-stage air compressor, namely a two-stage piston compressor 400 with a first compressor stage 401 and one second compressor stage 402 and a connection of the compressed air supply 1, not shown.
- the connection to the drying container 101 of the air dryer arrangement 100 follows.
- the air dryer of the air dryer arrangement 100 is further by means of the second part 202 of the main pneumatic line for guiding a compressed air flow DL to a pneumatic system, in the present case an air spring system 1002, pneumatically connected.
- a branch line 230 branches off at the compressed air supply 1 from the first part 201 of the main pneumatic line 200 and connects to a ventilation line 240 for ventilation 3 to a ventilation filter 3.1 connected downstream of the ventilation; the ventilation is connected by means of a further branch connection 241 and a connection section 242 to the ventilation line 240 and also to a further ventilation line 260 via the branch connection 261.
- the main pneumatic line 200 thus pneumatically connects the compressed air supply guide 1 and the compressed air connection 2, the air dryer arrangement 100 in the main pneumatic line 200 and further in the direction of the compressed air connection 2 an unlockable check valve 31 1 and a first throttle 331 are arranged.
- the pneumatically unlockable check valve 31 1 is part of the directional control valve arrangement 310 which, in addition to the unlockable check valve 31 1, has a controllable vent valve 312 in series connection with a second throttle 332 in the vent line 230.
- the pneumatically unlockable non-return valve 31 1 is also arranged in a series connection with the first throttle 331 in the main pneumatic line 200, the main pneumatic line 200 being the only pneumatic line that continues to the air suspension system 1002 with a further pneumatic line 600.
- the series arrangement of the first throttle 331 and pneumatically unlockable Check valve 31 1 is thus arranged between the air dryer arrangement 100 and the compressed air connection 2 to the air spring system 1002 in the main pneumatic line 200.
- the compressed air supply system 1001 has a pneumatically connected second pneumatic connection to the main pneumatic line 200 and the vent connection 3 and further filter 3.1 and / or muffler; namely the aforementioned ventilation line 230.
- the nominal diameter of the second throttle 332 is above the nominal diameter of the first throttle 331.
- the vent valve 312 arranged in the second pneumatic connection is formed as a 2/2-way valve in the vent line 230 that is separate from the pneumatically unlockable check valve 31 1.
- the controllable vent valve 312 is thus, as an indirectly switched relay valve, part of a valve arrangement 300 with a control valve 320 in the form of a 3/2-way solenoid valve.
- the control valve 320 can be electrically controlled with an electrical control signal that can be transmitted via an electrical control line 321, in the form of a voltage and / or current signal, to the coil 322 of the control valve 320.
- the control valve 320 can be operated from the position shown in FIG. 1 shown without current, the pneumatic control line 250 interrupting position are transferred to a pneumatically open position, in which pressure derived from the main pneumatic line 200 is passed on for pneumatic control of the controllable vent valve 312 as a relay valve via the pneumatic control line 250.
- the controllable vent valve 312 is additionally provided with a pressure limitation 313 in the present case.
- the pressure limitation 313 takes a pneumatic control line upstream of the vent valve 312 - specifically between the second throttle 332 and the vent valve 312 - from a pressure which, when a threshold pressure is exceeded, a piston 314 of the vent valve 312 against the force of a spring 315, in the present case an adjustable spring , lifts off the valve seat - in other words, the controllable vent valve 312, even without activation brings into the open position via the control valve 320. In this way it is avoided that an unintentionally excessive pressure arises in the pneumatic system 1000, in particular in the air spring system 1002.
- the control valve 320 separates the control line 250 in the presently closed state and is pneumatically connected via the further ventilation line 260 to the ventilation line 240 for ventilation 3.
- a line section 251 of the control line 250 between the vent valve 312 and the control valve 320 is in the case of the valve line shown in FIG. 1 shown closed position of the control valve 320 connected to the further vent line 260 between the control valve 320 and vent 3.
- the further ventilation line 260 connects in the further branch connection 261 to the ventilation line 230 and the further ventilation line 240. Thus, they are merged in a section between a further branch connection 261 and the vent 3 of a vent line 240.
- the vent valve 312 can thus be opened under pressure from the piston 314 when a main pneumatic line 200 or from the further pneumatic line 600 is present via the pneumatic control line 250 from the control port 252.
- the piston 314 is in the present case designed as a double piston, so that, with particular advantage, the transfer of the control valve 320 into the - in the above sense - open state not only leads to the opening of the vent valve 312, but also to the unlockable check valve 31 1 .
- the control valve 320 of the solenoid valve arrangement 300 is used to control both the vent valve 312 provided separately from the check valve 31 1 and the check valve 31 1.
- This further operating position which can be assumed by the compressed air supply system 1001, can be used during operation to vent the air spring system 1002 and at the same time to regenerate the air dryer arrangement 100.
- the operating position of the compressed air supply system 1001 shown serves, when the check valve 31 1 flows through in the forward direction, to fill the air suspension system 1002 via the main pneumatic line 200 and the further pneumatic line 600.
- the air suspension system 1002 of FIG. 1 in the form of an air suspension system in this case has a number of four so-called bellows 101 1, 1012, 1013, 1014, each of which is assigned to a wheel of a vehicle, not shown in detail, here in the form of a car 2000, and one each Form the vehicle air spring.
- the air suspension system has a memory 1015 for storing quickly available compressed air for the bellows 101 1, 1012, 1013, 1014.
- Those bellows 101 1 to 1014 are each arranged upstream of a spring branch line 601, 602, 603, 604 from a gallery 610, a solenoid valve 11 1 1, 1 1 12, 11 13, 11 14, each of which acts as a level control valve for opening or closing one air spring formed with a bellows 101 1 to 1014.
- the solenoid valves 1 11 1 to 1 1 14 in the spring branch lines 601 to 604 are designed as 2/2-way valves in a valve block 11 10.
- a solenoid valve 1 1 15 in the form of a further 2/2-way valve is arranged upstream of the store 1015 in a store branch line 605 as a store valve.
- the solenoid valves 11 1 1 to 11 15 are connected by means of the spring and storage branch lines 601 to 604 and 605 to a common collecting line, namely the aforementioned gallery 610 and then to the further pneumatic line 600.
- the gallery 610 is thus pneumatically connected to the compressed air connection 2 of the compressed air supply system 1001 via the pneumatic line 600.
- the solenoid valves 1 11 1 to 1 1 15 are arranged in a valve block 11 10. The solenoid valves are shown in FIG.
- the solenoid valves 1 11 1 to 1 1 15 are formed as normally closed solenoid valves.
- Other modified embodiments, not shown here, can implement a different arrangement of the solenoid valves - fewer magnetic valves can also be used in the context of the valve block 1010.
- the solenoid valves 1 1 1 1 1 to 1 1 14 upstream of the bellows 101 1 to 1014 and / or the solenoid valve 1 1 15 upstream of the accumulator 1015 are brought into an open position.
- the air dryer arrangement 100 is protected against unnecessary exposure to compressed air due to the check valve 31 1 blocked by the compressed air connection 2 to the compressed air supply 1 and the closed control valve 320.
- the air dryer arrangement 100 with compressed air is not advantageous in every operating position of the air suspension system 1002. Rather, it is advantageous for effective and rapid regeneration of the air dryer system 100 if this is carried out exclusively in the event of a venting of the air spring system 1002 from the compressed air connection 2 to the compressed air supply 1 with the check valve 31 1 unlocked.
- control valve 320 is brought into an open switching position, so that both the vent valve 312 opens and the check valve 31 1 is unlocked.
- the air suspension system 1002 can be vented via the first throttle 331, the unlocked check valve 31 1 with regeneration of the air dryer arrangement 100, and then via the second throttle 332 and the opened vent valve 312 for venting 3.
- a control piston 314 which can be pneumatically controlled by the control valve 320, is provided as a double relay piston with a relay vent body 314.1 of the vent. tion valve and a relay unlocking body 314.2 for the unlockable check valve 31 1.
- the double relay piston illustrates the present principle for unlocking the check valve 31 1 and simultaneously actuating the vent valve 312 via the two coupled actuating elements - namely via the relay unlocking body 314.2 and the relay vent body 314.1 - which can be designed as a one-piece double relay body or in a modification as a separate body .
- modified embodiments can implement a different arrangement of the valves, throttles, lines and branches.
- the above-mentioned actuating elements of the double relay piston can be formed as one-piece areas of a double relay piston.
- FIG. 2 now explains the details of the concept of the invention using the example of a reciprocating piston machine specifically in the form of the two-stage piston compressor 400 of FIG. 1 .
- FIG. 3 to FIG. 5 explain details of how the reciprocating piston machine in the form of the two-stage piston compressor 400 of FIG. 1, in particular how part of the first connecting rod P1 of the reciprocating piston machine is manufactured.
- FIG. 2 shows this a reciprocating piston machine in the form of a double compressor according to detail D of FIG. 1, namely a TWIN compressor designed as a two-stage piston compressor 400 with a first compressor stage 401 and a second compressor stage 402 as well as with a motor 500, which is coupled as a drive motor M with a drive shaft 501 to a crankshaft 430 of the piston compressor 400.
- a TWIN compressor designed as a two-stage piston compressor 400 with a first compressor stage 401 and a second compressor stage 402 as well as with a motor 500, which is coupled as a drive motor M with a drive shaft 501 to a crankshaft 430 of the piston compressor 400.
- the crankshaft 430 has a drive shaft coupling 431, which serves as a receptacle for the drive shaft 501 of the drive motor M.
- the crankshaft 430 is rotatably mounted on the outside of the drive shaft coupling 431 in a bearing 502, which in the present case is designed as a ring ball bearing.
- the bearing 502 in turn is held with a corresponding holding mechanism on the motor housing 503.
- the crankshaft 430 which can be driven in operation by means of the drive motor M can be named drive shaft coupling 431 for coupling the drive shaft 501 of the drive motor 500 for driving the crankshaft 430.
- crankshaft 430 also has an eccentric to the engine axis A on the crankshaft 430 formed crankshaft pin 432, which extends along an eccentric axis, which is referred to here as the shaft axis E be.
- the crankshaft journal 432 When the crankshaft 430 is driven in rotation, the crankshaft journal 432 is designed to drive a first connecting rod P1 directly and a second connecting rod P2 indirectly.
- the crankshaft journal 432 is designed by means of a crankshaft bearing element in the form of a first connecting rod bearing L1 for direct mounting and for direct driving of the first connecting rod P1.
- the second connecting rod P2 is in turn connected to the first connecting rod P1 functioning as the drive connecting rod P1, i. H. as a tow rod P2, movably supported via a coupling bearing element in the form of a bearing bush L2 and an elastically damping damping element in the form of an elastomer element L2E, which close a coupling element in the form of a bearing bolt L2B.
- the first connecting rod P1 is in the form of a drive rod P1
- the second connecting rod P2 is in the form of a tow rod P2.
- the elastomer element L2E and the bearing bush L2 are arranged in a connecting rod eye P1 A2 of the first connecting rod P1.
- the bearing bush L2 is arranged parallel to the axially aligned motor axis A in such a way that a bearing bush outer surface L2AO of the bearing bush L2 is opposite to a connecting rod eye inner surface PA2IO.
- a damping annulus DR is formed between the bearing bush outer surface L2AO and the connecting rod inner surface PA2IO of the connecting rod eye P1 A2, in which the elastomer element L2E has been injected and vulcanized.
- the elastomer element L2E fills the damping annulus DR in such a way that a positive fit is achieved.
- the damping element surface L2E01 lying on the bearing bush L2 and that on the connecting rod inner surface are Damping element surface L2E02 adjacent to the PA2IO is pressed in by the bearing bush L2 and by the connecting rod inner surface PA2IO, so that a form-fitting spherical articulation is created.
- a web S which runs centrally along the inner surface of the connecting rod PA2IO and extends in the direction of the outer surface of the bearing bush L2AO presses the elastomer element L2E into a groove N which runs centrally along the outer surface of the bearing bush L2AO and extends away from the inner surface of the connecting rod PA2IO to produce the positive locking ball joint to generate in this embodiment.
- the elastomer element L2E, the connecting rod inner surface PA2IO and the bearing bush L2 are thus shaped in this exemplary embodiment in such a way that they together form a ball joint-like bearing LKG.
- the elastomer element L2E can also have an alternative shape, which produces a positive-locking spherical articulation.
- the elastomer element L2E fills the damping annulus DR in such a way that holding forces generated by the positive locking are greater than the shear forces acting on the elastomer element L2E during operation of the reciprocating piston 400.
- an outer diameter d of the bearing bush L2 (see FIG. 4) is only a little smaller than a smallest inner diameter D of the connecting rod eye P1 A2 generated by the web S (see FIG. 3).
- the outer diameter d of the bearing bush L2 can, for example, be between 0.1% and 10% smaller than the smallest inner diameter D of the connecting rod eye P1 A2.
- the bearing bush L2 is coated with a material L2M with a low coefficient of friction, here in the form of PTFE.
- the coupling bearing element can also be coated with another material with a low coefficient of friction.
- the elastomer element L2E is not vulcanized onto the inner surface of the connecting rod PA2IO and also not onto the outer surface of the bearing bush L2AO.
- the first connecting rod bearing L1 is designed as a ring ball bearing.
- the first connecting rod bearing can also have a different bearing, for example, a roller bearing, needle bearing, slide bearing or the like.
- the elastomer element L2E has damping properties, so that the elastomer element L2E enables noise reduction and material wear of the bearing bush L2.
- the bearing pin L2B is firmly connected to the second connecting rod P2.
- the bearing pin L2B is pressed at its longitudinal ends in connecting rod eyes P2A2 and P2A2 'of the second connecting rod P2 with the connecting rod P2 via a press connection.
- the first connecting rod P1 and the second connecting rod P2 are thus rotatable relative to one another about the bearing pin L2B.
- the first piston K1 is inserted by means of a piston holder K11 as a separate part into the head end of the first connecting rod P1 and held there.
- the second piston K2 is integrally and integrally formed on the head end K22 of the second connecting rod P2 - that is, along a cylinder axis Z distally opposite the first piston K1.
- the second connecting rod P2 is for this purpose as a one-piece, approximately ring-like component - as in FIG. 2 can be seen - hung on the bearing bush L2 rotatably relative to the connecting rod P1.
- the first piston can also be molded onto the first connecting rod P1 or the second piston can be held on the second connecting rod P2 (not shown).
- the second piston K2 of the first compressor stage 401 moves in a cylinder displacement 41 1 of the first cylinder 410 in the first (low pressure) compressor stage 401.
- the first piston K1 moves in a cylinder displacement 421 of a second cylinder 420 of the second (high pressure -) Compressor stage 402.
- the first and second cylinders 410, 420 are part of a housing 440 of the entire air compressor with piston compressor 400, drive motor M and crankshaft 430.
- the housing 440 of the air compressor is parts 441 to the housing of a compressed air supply system 1001, as shown in FIG. 1 is shown.
- FIG. 2 shows the TWIN compressor 400, in this case in an operating position, according to which the second piston K2 of the (low-pressure) compressor stage 401 is in a stroke position HS, that is to say the compression of the air in the displacement 41 1 is imminent.
- the first piston K1 of the two th compressor stage 402 is in a compression position VS, that is to say compressed air is compressed from the second high pressure stage 402 and can be discharged to the compressed air supply system 1001.
- the movement of the first and second pistons K1, K2 during the operation of the piston compressor 400 basically takes place along the cylinder axis Z. This is center-symmetrical to the cylinder surfaces Z1 and Z2 of the first and second cylinder displacement 41 1, 421 for the second and first pistons K2, K1 of the first and second cylinder 410, 420.
- the first connecting rod P1 runs along a first connecting rod axis Pb running parallel to the radially oriented cylinder axis Z and the second connecting rod P2 runs along a parallel to the radially oriented cylinder Z axis of the second connecting rod axis Pa.
- the connecting rod length of the first connecting rod P1 can be, for example, around 52.00 mm.
- the first connecting rod P1 can, for example, also have a connecting rod length between 50 and 70 mm, in particular a connecting rod length of 66 mm.
- the second connecting rod can for example have a connecting rod length between 40 and 60 mm, in particular a connecting rod length of 53 mm.
- the distance between a piston head of the piston K2 and the eccentric crankshaft journal 432 can be, for example, between 15 and 25 mm, in particular 21 mm.
- the aforementioned di dimensions can allow a deflection angle of the connecting rods to each other of up to 20 °, for example 14 °, and +/- 7 ° and in particular 7 °.
- the connecting rods P1 and P2 are designed such that a maximum deflection angle of the deflection of the connecting rods P1 and P2 between see the first connecting rod axis Pb and the second connecting rod axis Pa in the direction of a perpendicular to the cylinder axis Z and perpendicular to the engine axis A extending deflection axis is at most 14 °.
- the bearing pin L2B has a diameter of 8 mm in this exemplary embodiment and can for example have a diameter between 5 mm and 12 mm.
- the diameter of the bearing pin L2B is constant in this exemplary embodiment.
- the diameter of the bearing pin L2B can also change along its longitudinal axis.
- the cylinder axis Z is oriented such that it runs along a radius around the shaft axis E (eccentric axis E).
- the shaft axis E runs exactly perpendicular to the cylinder axis Z. That is, the eccentric crankshaft pin 432 of the crankshaft 430 is also arranged exactly perpendicular to the cylinder axis Z in the piston compressor 400.
- a sufficiently reliable and tight running of the second and first pistons K2, K1 in the first (low-pressure) compressor stage or (high-pressure) compressor stage 401, 402 is therefore due to the direction of the pistons K2, K1 also along the cylinder axis Z guaranteed.
- the arrangement of the first connecting rod P1 with piston K1 or the second connecting rod P2 with piston K2 is carried out with the same bearing using the first connecting rod bearing L1 or the bearing bush L2 exactly along the cylinder axis Z.
- the bearing bush L2 can be aligned parallel to the motor axis A and installed in the connecting rod eye P1 A2.
- a reciprocating piston machine in the form of a TWIN compressor 400 with first and second compressor stages 401, 402 in which the first connecting rod P1 of the second, namely (high-pressure) compressor stage 402 is formed, the first connecting rod P1 using the Connecting rod bearing L1 is mounted directly on the crankshaft journal 432 - that is, as a connecting rod P1 - and the second connecting rod P2 of the first, here (low-pressure) compressor stage 401 is formed, the second connecting rod P2 being indirectly connected to the crankshaft by means of the bearing bush L2 Lenzapfen 432, that is directly on the first connecting rod P1 - so as a connecting rod P2 on the connecting rod P1 - is mounted.
- FIG. 3 is a section of the first connecting rod P1 shown in FIG. 2 shown lifting piston machine shown during manufacture.
- the web S was injection-molded in the middle along the connecting rod inner surface PA2IO, which extends in the direction of the bearing bush L2.
- the smallest internal diameter D of the connecting rod eye P1 A2 is produced by the web S.
- the bearing bush L2 was arranged in the connecting rod eye P1 A2 parallel to the axially aligned motor axis A in such a way that the bearing bush outer surface L2AO of the bearing bush L2 is opposite the connecting rod eye inner surface PA2IO.
- the bearing bush L2 has a groove N which has a greater width NB and a greater height NH than the web S, i. that is, the groove N has a greater width NB than the width SB of the web S and a greater height NH than the height SH of the web S.
- the bearing bush L2 is selected such that the bearing bush L2 has a smaller outer diameter d , as the smallest inner diameter D of the connecting rod eye P1 A2 generated by the web S.
- the damping annulus DR is formed between the bearing bush L2 and the inner surface of the connecting rod PA2IO.
- the connection is based on the fact that a quasi-positive fit is fathered.
- the diameters d and D are almost the same size, so that high shear forces would have to be applied within the elastomer element L2E to release the connection.
- the diameters d and D can be tuned in such a way that loosening due to the operation of the reciprocating piston machine 400 is excluded, since the holding forces HK in this case are greater than the shear forces SK occurring during operation.
- FIG. 6 shows a section of a first connecting rod P1 ′ of a second exemplary embodiment of a reciprocating piston machine.
- the second exemplary embodiment also contains the first connecting rod P1 'in the form of a drive rod P1' and a second connecting rod in the form of a towing rod (not shown).
- a connecting rod eye P1 A2 'of the first connecting rod P1' a coupling bearing element in the form of a bearing bush L2 '' and a damping element in the form of an elastomer element L2E '' are arranged.
- the bearing bush outer surface L2A0 ' has a curved, circular, circumferential bearing bush outer surface section L2AOA' in the direction of the connecting rod inner surface PA2I0 'opposite it.
- the connecting rod inner surface PA2I0 ' has a curved, arcuate, circumferential connecting rod inner surface section PA2IOA' in the direction of the bearing bush outer surface L2A0 '.
- the inner surface of the connecting rod eye and the outer surface of the bearing bush are convexly curved toward one another.
- the surfaces can also have a different curvature or a plurality of curvatures (not shown).
- the inner surface of the connecting rod and the outer surface of the bearing bush can also be shaped in such a way that they each have at least one curved section which is curved in the direction of the opposite surface and surrounds the respective one of the opposite surfaces.
- a damping annulus DR is formed between the connecting rod inner surface PA2IO 'and the bearing bush outer surface L2A0', into which the elastomer element L2E 'is injected and vulcanized. In this exemplary embodiment too, the elastomer element L2E 'is not vulcanized onto the adjoining surfaces.
- the damping element can be arranged with a parallel to the axially aligned motor axis biconcave, conforming shape to the inner surface of the connecting rod eye and the outer surface of the bearing bush along the damping annular space between the inner surface of the connecting rod surface and the outer surface of the bearing bush.
- the bearing bush L2 ' is completely coated with a material L2M' with a low coefficient of friction, here in the form of PTFE.
- the bearing bush L2 ' was used in one
- FIG. 7 shows an exemplary embodiment of a method for producing a reciprocating piston machine, as is shown, for example, in FIG. 2 is shown.
- the reciprocating piston machine produced by the method has at least one connecting rod designed to deflect a first piston in the form of a connecting rod with a connecting rod eye, and a second connecting rod designed to deflect a second piston in the form of a connecting rod with at least one connecting rod.
- nem another connecting rod eye and a coupling element in the form of a bearing bolt which extends through the connecting rod eye and the at least one further connecting rod eye in the assembled state.
- the drive rod and the tow rod are rotatable relative to each other around the bearing pin.
- step 700 a web is injection-molded in the middle along a connecting rod eye inner surface of the connecting rod eye of the drive connecting rod, which extends in an assembled state in the direction of the bearing pin.
- a coupling bearing element in the form of a bearing bush is provided with a groove running centrally along an outer surface of the bearing bush.
- the groove In an assembled state, the groove extends away from the inner surface of the connecting rod.
- the groove has a greater width and a greater height than the web.
- the bearing bush is arranged in the connecting rod eye of the drive connecting rod such that it is arranged parallel to an axially aligned motor axis during operation and the bearing bush outer surface of the bearing bush is opposite the inner surface of the connecting rod eye.
- the bearing bush is selected in this embodiment such that it has a smaller outer diameter than a smallest inner diameter of the connecting rod generated by the web.
- the bearing bush can be arranged to set a piston length and thus also a dead space.
- step 730 a damping element in the form of an elastomer element is injected into a damping annulus that arises between the inner surface of the connecting rod and the outer surface of the bearing bush, and the damping annulus is filled with the elastomer element in such a way that, after vulcanization, a positive locking spherical articulation between the Bearing bush and the connecting rod inner surface is generated.
- step 740 the elastomer element is vulcanized under pressure and heat without vulcanizing it to the inner surface of the connecting rod eye and the outer surface of the bearing bush.
- the damping element surface of the elastomer element lying on the inside of the connecting rod eye becomes pressed into the groove of the outer surface of the bearing bush by the web, so that a form-fitting spherical articulation results.
- Steps 700 and 710 can also be replaced by alternative steps which adapt the shape of the connecting rod inner surface and the outer surface of the bearing bush in such a way that they are injected and vulcanized together with a damping annulus formed between them
- Elastomer element create a form-fitting spherical articulation.
- step 700 can be replaced by a step in which the connecting rod inner surface is curved in the direction of the bearing bush outer surface and step 710 by a step in which the bearing bush outer surface is curved in the direction of the connecting rod inner surface so that when the bearing bush was arranged in the connecting rod eye in step 720, are curved toward one another.
- the damping annulus between the connecting rod inner surface and the outer surface of the bearing bush can then assume a biconcave shape parallel to the axially oriented motor axis, so that the vulcanized elastomer element injected and vulcanized into steps 730 and 740 also has a bi parallel to the axially oriented motor axis concave, conforming to the inner surface of the connecting rod and the outer surface of the bearing bush.
- the elastomer element then fills the damping annulus in such a way that a form-fitting spherical articulation arises between the bearing bush and the inner surface of the connecting rod.
- the elastomer element together with the outer surface of the bearing bush and the inner surface of the connecting rod, is used for ball-joint-like mounting and can optimize the rolling characteristics depending on the shape. This can reduce wear and improve acoustic behavior.
- L2E, L2E 'damping element in the form of an elastomer element
- PA2I0A circumferential connecting rod inner surface section
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018128557.4A DE102018128557A1 (de) | 2018-11-14 | 2018-11-14 | Hubkolbenmaschine, Druckluftversorgungsanlage, Fahrzeug und Verfahren zur Herstellung einer Hubkolbenmaschine |
| PCT/EP2019/078737 WO2020099073A1 (de) | 2018-11-14 | 2019-10-22 | Hubkolbenmaschine, druckluftversorgungsanlage, fahrzeug und verfahren zur herstellung einer hubkolbenmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3880963A1 true EP3880963A1 (de) | 2021-09-22 |
| EP3880963B1 EP3880963B1 (de) | 2022-08-17 |
Family
ID=68392964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19795494.4A Active EP3880963B1 (de) | 2018-11-14 | 2019-10-22 | Hubkolbenmaschine, druckluftversorgungsanlage, fahrzeug und verfahren zur herstellung einer hubkolbenmaschine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12055134B2 (de) |
| EP (1) | EP3880963B1 (de) |
| CN (1) | CN112888856B (de) |
| DE (1) | DE102018128557A1 (de) |
| WO (1) | WO2020099073A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985384B (zh) * | 2019-11-29 | 2023-11-17 | 安徽美芝精密制造有限公司 | 压缩机及制冷设备 |
| US12019460B2 (en) | 2021-06-24 | 2024-06-25 | Apple Inc. | Shared compressor |
| CN117463126B (zh) * | 2023-10-30 | 2024-10-25 | 杰锋汽车动力系统股份有限公司 | 一种干燥器、空气泵、空气悬架系统及车辆 |
| DE102023134427A1 (de) * | 2023-12-08 | 2025-06-12 | Rapa Automotive Gmbh & Co. Kg | Druckluftversorgungseinheit mit sternverdichter |
| CN117927448B (zh) * | 2024-03-21 | 2024-06-18 | 苏州瑞玛精密工业股份有限公司 | 一种空压机、集成式气体供给装置及供气方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH074487A (ja) | 1993-06-17 | 1995-01-10 | Ouken Seiko Kk | クランク駆動機構 |
| FR2779480B1 (fr) * | 1998-06-03 | 2000-11-17 | Guy Negre | Procede de fonctionnement et dispositif de moteur a injection d'air comprime additionnel fonctionnant en mono energie, ou en bi energie bi ou tri modes d'alimentation |
| DE10323125A1 (de) | 2003-05-22 | 2004-12-16 | Arnold Müller GmbH & Co KG | Pleuel für den Kolben eines Verdichters |
| DE102004020104A1 (de) | 2004-04-24 | 2005-11-17 | Arnold Müller GmbH & Co KG | Doppelkolben für einen Verdichter |
| DE102010062160A1 (de) | 2010-11-30 | 2012-05-31 | Continental Teves Ag & Co. Ohg | Motor-Pumpenaggregat |
| DE102016001596A1 (de) * | 2016-02-11 | 2017-08-17 | Wabco Gmbh | Hubkolbenmaschine, insbesondere zwei- oder mehrstufiger Kolbenkompressor, Druckluftversorgungsanlage, Druckluftversorgungssystem und Fahrzeug, insbesondere PKW mit einer Druckluftversorgungsanlage |
| DE102016001576A1 (de) | 2016-02-11 | 2017-08-17 | Wabco Gmbh | Hubkolbenmaschine, insbesondere zwei- oder mehrstufiger Kolbenkompressor, Druckluftversorgungsanlage, Druckluftversorgungssystem und Fahrzeug, insbesondere PKW mit einer Druckluftversorgungsanlage |
-
2018
- 2018-11-14 DE DE102018128557.4A patent/DE102018128557A1/de not_active Withdrawn
-
2019
- 2019-10-22 WO PCT/EP2019/078737 patent/WO2020099073A1/de not_active Ceased
- 2019-10-22 US US17/290,273 patent/US12055134B2/en active Active
- 2019-10-22 CN CN201980069204.1A patent/CN112888856B/zh active Active
- 2019-10-22 EP EP19795494.4A patent/EP3880963B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP3880963B1 (de) | 2022-08-17 |
| US20210404458A1 (en) | 2021-12-30 |
| DE102018128557A1 (de) | 2020-05-14 |
| US12055134B2 (en) | 2024-08-06 |
| CN112888856A (zh) | 2021-06-01 |
| CN112888856B (zh) | 2022-09-27 |
| WO2020099073A1 (de) | 2020-05-22 |
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