Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • 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
  • F04B39/08—Actuation of distribution members
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
  • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
  • F04B39/123—Fluid connections
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B41/00—Pumping installations or systems specially adapted for elastic fluids
  • F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
• • 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
  • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
  • F04B49/02—Stopping, starting, unloading or idling control
  • F04B49/03—Stopping, starting, unloading or idling control by means of valves
• • 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
  • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
  • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
  • F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
• • 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
  • F04B2201/00—Pump parameters
  • F04B2201/12—Parameters of driving or driven means
  • F04B2201/124—Coupling parameters
• • 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
  • F04B2201/00—Pump parameters
  • F04B2201/12—Parameters of driving or driven means
  • F04B2201/124—Coupling parameters
  • F04B2201/1241—Engagement

Definitions

• the invention relates to a piston compressor for compressing a gas, which is optionally separable by means of a clutch of a drive device, with an inlet valve, which is arranged between an inlet line for gas to be compressed and a compression chamber of the piston compressor and a
• Outlet valve which is arranged between the compression chamber of the reciprocating compressor and a discharge line for compressed gas.
• Such compressors are used for example for the compressed air supply of commercial vehicles, in particular for the compressed air supply of the brake system.
• the drive of the compressor is carried out via the drive train of the internal combustion engine.
• a clutch is arranged to separate the compressor from the drive when the compressed air system of the commercial vehicle is filled with compressed air.
• the discharge line of the compressor is emptied simultaneously with the opening of the clutch.
• Compression chamber results in the first compression stroke of the piston a
• the invention is therefore based on the object to provide an improved piston compressor, which has the aforementioned disadvantages and the resulting
• a piston compressor for compressing a gas which is optionally separable by means of a coupling of a drive device, with an inlet valve which is arranged between an inlet line for gas to be compressed and a compression chamber of the reciprocating compressor and an outlet valve, which between the Compaction space of
• Piston compressor and a discharge line for compressed gas is arranged.
• the reciprocating compressor has a separate closing device arranged behind the outlet valve in the flow direction of the gas, by means of which the outlet line can be closed off during the separation of the reciprocating compressor from the drive device with respect to the compression space.
• Such a reciprocating compressor has an inlet line, which is in particular part of an inlet system and through which a gas to be compressed to a Verdichtungsraunn the reciprocating compressor is performed.
• an inlet valve is arranged between the inlet line and the compression space, which is open during the intake of gas to be compressed into the compression space (the pressure in the compression space is lower than the pressure in the inlet line).
• the inlet valve closes the compression of the gas in the compression chamber (the pressure in the compression chamber is higher than the pressure in the intake pipe).
• an outlet valve is arranged, which is discharged from the compressed gas during discharge
• Compression space is opened (the pressure in the compression chamber is higher than the pressure in the outlet line), thus defining a connection between the compression chamber and the outlet.
• the exhaust valve closes the connection during the intake of gas to be compressed in the compression space
• Compression space and outlet line (the pressure in the compression chamber is less than the pressure in the outlet) to prevent backflow of compressed gas from the outlet into the compression space.
• valves For both intake and exhaust valves of reciprocating compressors valves are often used, which have a closing body, which depends on the
• valves Pressure difference on both sides of the valve is pressed onto the valve seat and thereby closes the valve or lifted off the valve seat, whereby the valve opens.
• a common type of such valves has a serving as a closing body valve tongue.
• piston compressors it is also known for piston compressors to use inlet and outlet valves, which have switched valve bodies.
• the piston compressor according to the invention has a separate closing device arranged behind the outlet valve in the flow direction of the gas.
• Locking device is designed so that it is particularly gas-tight
• Completing the exhaust line to the exhaust valve is suitable.
• a return flow of compressed gas from the outlet line back into the compression chamber through a possibly not reliably closed exhaust valve can thus be prevented by the closed locking device.
• the locking device is a relative to the exhaust valve separate device which is arranged independently of the exhaust valve and is not in operative connection with this.
• the closing device is arranged in particular adjacent to the outlet valve at the beginning of the outlet line facing the compression chamber.
• Compaction space exists in particular during a separation of the reciprocating compressor from the drive device and in particular when the outlet line is filled. Therefore, in particular during the separation of the piston compressor from the drive device by means of the closing device, the outlet line can be closed off from the compression space. This prevents pressurized compressed gas during a separation of the piston compressor from the drive device, in particular by a not completely closing exhaust valve from the
• Outlet line passes back into the compression chamber and there may cause an increase in pressure with the consequences described above.
• the closing device closes the outlet line depending on the pressure difference applied to both sides of the closing device.
• the closing device is designed such that it closes when the pressure in the outlet line in the direction of flow of the gas after the closing device is higher than the pressure in the outlet line before
• Closing device ie in the direction of the compression chamber of the reciprocating compressor. This is especially the case when the exhaust valve does not close reliably, so that compressed gas from the exhaust pipe can flow back into the compression space. In this case, a pressure drop occurs on the side of the closing device facing the compression chamber, which then leads to closing of the closing device.
• a check valve forms the
• Check valves also switch depending on the applied pressure difference on both sides of the check valve.
• the closure element is usually biased so that the valve at the same pressure on both sides of the valve or a compensable up to a compensated by the bias
• a suitable type of stop valve suitable for the present purpose is a check valve.
• Valve means the locking device.
• the valve means the locking device.
• Switching position of the closing device freely controllable, in particular dependent on various parameters, such as depending on the switching state of the coupling between the drive device and the reciprocating compressor or depending on the pressure difference between the compressed gas system and the compression chamber.
• Locking device designed so that it can be switched simultaneously with the opening of the clutch in a closed position.
• a circuit of the locking device simultaneously with the opening of the clutch in a closed position offers the advantage that the
• Outlet line is always completed with respect to the compression chamber as soon as the reciprocating compressor is not driven. In this way, the risk of unrecognized leakage of compressed gas back into the compression chamber at non-driven piston compressor with the negative described above
• a 2/2-way valve forms the switchable valve device.
• Such a valve provides a convenient and
• An embodiment of the reciprocating compressor has a control device which is connected both to the clutch and to the switchable valve device is signal-connected.
• a control device may be formed by the control device of the compressed gas system, which controls the switchable
• Valve device with takes over.
• Compressed gas system has separate control device which serves to switch the closing device.
• Piston compressor proposed for compressing a gas.
• Piston compressor is optional by means of a coupling of a
• Piston compressor is arranged and has an exhaust valve, which is arranged between the compression chamber of the reciprocating compressor and a discharge line for compressed gas. Furthermore, the reciprocating compressor has an in
• Compaction space is lockable, and a control device which is signal-connected with both the clutch and with the switchable valve device.
• the control device switches the switchable valve device into a closed position when the coupling between the reciprocating compressor and the drive device is open. Characterized in that the locking device with the clutch open between the
• the control device then switches the switchable valve device into a
• This process step ensures that the outlet line is always open with respect to the compression chamber of the reciprocating compressor as soon as the reciprocating compressor is driven in order to prevent the build-up of a backpressure at the outlet with respect to the compression chamber, which has a negative effect on the compression output of the reciprocating compressor or even to one Damage to the piston compressor and / or the clutch could result.
• the locking device is designed, this
• the switchable closing device can be formed for example by a 2/2-way valve.
• Fig. 1 is a schematic representation of an exemplary piston compressor of
• FIG. 2 is an illustration of an exemplary exhaust valve as shown in FIG.
• Piston compressors is used in the prior art
• FIG. 3 shows a schematic representation of a first exemplary embodiment of a piston compressor according to the invention, in which a shut-off valve forms the closing device;
• Fig. 4 is a schematic representation of a second exemplary embodiment of a piston compressor according to the invention, in which a switchable
• FIG. 1 shows a schematic representation of an exemplary reciprocating compressor 10 as known in the art.
• the crankshaft 1 1 of the reciprocating compressor 10 is via a clutch 3 with a drive device (not shown, here a
• crankshaft 1 1 stands still during the separation of the reciprocating compressor 10 from the drive means.
• the crankshaft 1 1 is connected to an eccentrically mounted thereto connecting rod 12, on which a piston 13 is mounted.
• the piston 13 is mounted axially movable in a cylinder 14 of the reciprocating compressor 10.
• crank mechanism 15 is disposed in a crankcase 16 which is fixedly connected to the cylinder 14.
• the piston 13 is moved by the connecting rod 12 in the cylinder 14 so that it performs a lifting movement.
• the cylinder 14 is closed by a valve plate 20.
• the cylinder 14, the piston 13 and the valve plate 20 define the
• an inlet valve 21 is arranged, which is arranged between an inlet line 22 and the compression chamber 17.
• the inlet conduit 22 is part of an inlet system 23 which draws fresh air from the environment through a filter (not shown) and over
• the cylinder head is arranged above the valve plate 20 and has a cylinder head volume 24, which via the inlet valve 21 with the
• Compaction space 17 is in communication.
• the inlet valve 21 is designed as a check valve, which is a suction of fresh air in the compression chamber 17th
• Compaction space 17 sucked air prevented.
• an outlet valve 26 is further arranged, which is arranged between the compression chamber 17 and an outlet 27.
• compressed gas here air
• a compressed air storage not shown here.
• the exhaust valve 26 which is also designed as a check valve, a back flow of compressed air from the
• FIG. 2 is an illustration of an exemplary exhaust valve 26 as shown in FIG.
• Piston compressors 10 is commonly used in the art. The
• Exhaust valve 26 is disposed on the valve plate 20 of the reciprocating compressor 10 above the compression space 17.
• the valve plate 20 has an outlet opening 28 which connects the compression space 17 with a cylinder head volume 27 a arranged in the valve plate 20 and cylinder head of the piston compressor 10, which is connected to the outlet line 27.
• the outlet valve 26 has as a valve body on a valve tongue 26 a, which dissolves from a predetermined pressure difference between the compression chamber 17 and the outlet 27 from the valve seat 26 b and a flow of air from the
• the outlet valve 26 further has a contact element 26c arranged above the outlet opening 28, against which the valve tongue 26a bears in the opened state. As soon as the valve tongue 26a releases from the valve seat 26b, the pressurized air can escape from the
• Cylinder head volume 27a for example, by forming deposits by
• FIG. 3 shows a schematic representation of a first exemplary embodiment of a piston compressor 10 according to the invention.
• the construction of the piston compressor 10 in FIG. 3 largely corresponds to the construction of the piston compressor 10 shown in FIG.
• Piston compressors 10 are denoted by the same reference numerals. In the following, only the differences between the reciprocating compressor 10 from FIG. 3 and the reciprocating compressor 10 from FIG. 1 will be explained.
• the piston compressor 10 shown in FIG. 3 has a closing device in the form of a shut-off valve, which is arranged separately behind the outlet valve 26 in the flow direction.
• the check valve is as a check valve 31 with biased
• This check valve 31 opens when the pressure of the air discharged from the reciprocating compressor 10 flowing out of the compression space 17 through the exhaust valve 26 is higher by an amount than the pressure of the air in the exhaust pipe 27.
• the amount of the pressure difference is at least so large that the bias of the check valve 31 is overcome, so that the check valve 31 opens.
• FIG. 4 shows a schematic representation of a second exemplary
• Embodiment of a piston compressor according to the invention 10 The construction of the piston compressor 10 in Fig. 4 corresponds largely to the structure of the illustrated in Fig. 1 and described for this purpose piston compressor 10 so that the same elements of the reciprocating compressors 10 are designated by the same reference numerals. In the following, only the differences of the piston compressor 10 from FIG. 4 with respect to the piston compressor 10 from FIG. 1 are explained.
• the piston compressor 10 shown in Fig. 4 has a closing device in the form of a switchable valve device 32, which downstream of the
• Exhaust valve 26 is arranged separately.
• the switchable valve device 32 is executed in the exemplary embodiment as a 2/2-way valve, which is switchable from a closed position to the illustrated open position.
• Valve device 32 is connected via a control line 32a to a control device 33 which opens and closes the switchable valve device 32 by means of switching signals transmitted via the control line 32a.
• the control device 33 is furthermore connected to the clutch 3 via a control line 3a, signals relating to the switching position of the clutch 3 being transmitted to the control device 33 via the control line 3a.
• the control device 33 is furthermore connected to the clutch 3 via a control line 3a, signals relating to the switching position of the clutch 3 being transmitted to the control device 33 via the control line 3a.
• Control device 33 via a control line 33 a with the control of
• Open position switchable valve device 32 are conveyed into the outlet 27 and fed to the compressed air system.
• the control device 33 is connected to the control of the compressed air system, the opening of the clutch 3 simultaneously with the switching of the switchable
• Valve device 32 in the closed position and the closing of the clutch. 3

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Compressor (AREA)
• Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
• Control Of Positive-Displacement Pumps (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (2)

Family

ID=58401583

Family Applications (1)

Country Status (7)

Citations (4)

Family Cites Families (12)

• 2016
  • 2016-03-21 DE DE102016105148.9A patent/DE102016105148A1/de not_active Ceased
• 2017
  • 2017-03-23 WO PCT/EP2017/056910 patent/WO2017186416A1/de unknown
  • 2017-03-23 KR KR1020187030332A patent/KR20190123666A/ko unknown
  • 2017-03-23 BR BR112018068205A patent/BR112018068205A2/pt not_active Application Discontinuation
  • 2017-03-23 CN CN201780018711.3A patent/CN108934172B/zh not_active Expired - Fee Related
  • 2017-03-23 JP JP2018549493A patent/JP6689398B2/ja not_active Expired - Fee Related
• 2018
  • 2018-09-20 US US16/136,908 patent/US20190017498A1/en not_active Abandoned

Patent Citations (4)

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