EP3067560A1 - Vacuum pump and method for operating a scroll pump or a vacuum pump with at least two pump stages - Google Patents
Vacuum pump and method for operating a scroll pump or a vacuum pump with at least two pump stages Download PDFInfo
- Publication number
- EP3067560A1 EP3067560A1 EP15158724.3A EP15158724A EP3067560A1 EP 3067560 A1 EP3067560 A1 EP 3067560A1 EP 15158724 A EP15158724 A EP 15158724A EP 3067560 A1 EP3067560 A1 EP 3067560A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vacuum pump
- pump
- pressure sensor
- pressure
- seals
- 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
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005086 pumping Methods 0.000 claims abstract description 27
- 238000011156 evaluation Methods 0.000 claims abstract description 24
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 230000009467 reduction Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 43
- 230000008901 benefit Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 239000012876 carrier material Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000004092 self-diagnosis Methods 0.000 description 1
- 239000002470 thermal conductor Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
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
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
-
- 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
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
- F04B39/041—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod
-
- 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
- F04B49/20—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 changing the driving speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/08—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the rotational speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/0085—Prime movers
-
- 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
- F04B2205/00—Fluid parameters
- F04B2205/01—Pressure before the pump inlet
-
- 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
- F04B2205/00—Fluid parameters
- F04B2205/03—Pressure in the compression chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2220/00—Application
- F04C2220/10—Vacuum
- F04C2220/12—Dry running
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/05—Speed
- F04C2270/052—Speed angular
- F04C2270/0525—Controlled or regulated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/18—Pressure
- F04C2270/185—Controlled or regulated
Definitions
- the invention relates to a vacuum pump and a method for operating a scroll pump or a vacuum pump with at least two pump stages.
- pre-pumping usually refers to evacuating vacuum pumps. This designation is due to the fact that it is often used in combination with vacuum pumps that can generate a high vacuum but do not compress to atmospheric pressure.
- An example of such a high vacuum pump is the turbomolecular pump.
- backing pumps are vacuum positive displacement pumps, such as rotary vane pumps and piston pumps. Very often, the backing pumps are designed in multiple stages, since the high vacuum pumps combined with them only produce a pressure of a few millibars at their gas outlet and therefore a large pressure range has to be bridged.
- the fore pump must first compress large amounts of gas.
- the per-unit compressible amount of gas in these examples depends on the maximum pumping chamber volume and the frequency with which the pumping chamber is changed from its maximum to the minimum size. If little gas is applied, the fore pump is oversized in terms of the pumping chamber volume and speed. Of these values, however, the power consumption of the backing pump is dependent and it is desirable to minimize these.
- the prior art ( DE 10 2006 050 943 A1 ) includes a vacuum pump with at least two pump stages, in which between the two pumping stages, a gas pressure sensitive signal transmitter is arranged, which communicates with an evaluation unit in electrical connection, wherein the evaluation unit in turn is in communication with the motor drive, so that a speed position depending on the Signal generator given signal is possible.
- Vacuum pumps are known, for example, reciprocating piston seals between the piston and the inner wall of the pump chamber exhibit. Because these gaskets make contact between the piston and the cylinder, they are so-called wear-type seals that wear over time. As a result, the pump power of the pump is also reduced over time.
- Scroll pumps are also called spiral vacuum pumps or spiral fluid conveyors. These pumps work according to the displacement principle.
- a spiral vacuum pump consists of two nested spiral cylinders (for example Archimedean spirals or involutes). One of these spirals is fixed, the other moves on an eccentric drive (eccentric, eccentric shaft) on a circular path.
- wobbling centrally symmetric oscillation
- individual closed crescent-shaped cavities form between the spirals, reducing their volume further and further inwards.
- the fluid to be pumped for example gas, is drawn in from the outside, compressed inside the pump and ejected through an opening in the center of the coil.
- the height of the spiral walls, their distance and the speed define the suction power of a spiral vacuum pump.
- the technical problem underlying the invention is this, belonging to the prior art vacuum pump to further improve that the life of weary seals in the vacuum pump is increased.
- a method is to be specified with which the wear of seals in the vacuum pump can be detected early.
- the vacuum pump according to the invention with at least one pumping stage, a motor and a motor control, wherein the vacuum pump is designed as a dry-running pump with wear-related seals, is characterized in that at least one pressure sensor is arranged before the first pumping stage and / or in at least one compression chamber of the vacuum pump and that the pressure sensor is connected to an evaluation unit.
- the vacuum pump according to the invention can be designed as a piston pump, for example a reciprocating piston pump. This reciprocating pump has at least one pumping stage.
- the vacuum pump according to the invention can also be designed as a scroll pump with at least one pumping stage.
- the inventive arrangement of the at least one pressure sensor before the first pumping stage and / or in at least one compression chamber of the vacuum pump it is possible to perform a more accurate measurement of the producible pressure, whereby a more accurate control of the speed is possible than with a pressure switch between the pumping stages.
- the at least one pressure sensor is arranged in the intake region of the vacuum pump.
- Another particularly preferred embodiment of the invention provides that an additional valve for closing a suction opening of the vacuum pump is provided.
- the vacuum pump has an intake opening.
- the suction port is connected to a recipient.
- This suction port is closed by an additional valve according to the preferred embodiment of the invention.
- the vacuum pump for example, when you turn on the vacuum pump, perform an independent review of the final pressure. From this final pressure, the vacuum pump can close on the wear of the seals, that is, the piston seals or the seals of the scroll pump.
- the final pressure is checked here in the relatively limited and small space of the intake flange.
- the measurement is independent of the recipient.
- the at least one sensor is designed as a Pirani sensor. Pirani sensors are very reliable sensors.
- a further advantageous embodiment of the invention provides that a display device for indicating a faulty and / or reduced power of the vacuum pump is provided. For example, if a predetermined final pressure is not reached when closing the additional valve to close the suction port of the vacuum pump, it can be assumed that the seals are subject to a certain degree of wear. This reduced power is advantageously displayed in the display device, so that the user of the vacuum pump can read the current pressure value.
- the display device On the display device, the user can also be advised that a necessary maintenance of the vacuum pump is to be made.
- the display device may have a display or at least one LED. It can also be emitted acoustic signals.
- the vacuum pump is advantageously designed as a scroll pump.
- a scroll pump is a dry-running pump. Dry-running pumps are pumps which do without auxiliary fluids, such as oil, in the area of the working space and which can thereby avoid contamination of the working medium.
- the inventive method for operating a scroll pump or a vacuum pump with at least two pumping stages is characterized in that in pumping the pressure sensor, a gas pressure in the intake and / or in measures at least one compression space of the vacuum pump that the one or more measured values of the pressure sensor is evaluated by an evaluation unit and that the speed of the pump is set in dependence on an evaluation result.
- the method according to the invention has the advantage that by measuring the achievable pressure, that is to say the gas pressure in the intake region and / or in at least one compression chamber of the vacuum pump, the state of the pump, in particular of the seals, can be accurately detected.
- the measured value (s) of the pressure sensor are evaluated by an evaluation unit for this purpose.
- the evaluation unit is advantageously stored, in which range the measured values are ideally.
- the speed of the pump is set.
- high speeds are set at high input pressures and low speeds at low input pressures to achieve optimum pumping speed.
- Another inventive method for operating a vacuum pump with at least two pumping stages or a scroll pump is characterized in that when starting the vacuum pump, a valve which separates a suction from the recipient is closed, that the pressure sensor is a gas pressure in the closed against the recipient intake and / or measures in at least one compression chamber of the vacuum pump, that the one or more measured values of the pressure sensor are evaluated by an evaluation and that depending on an evaluation result, information is output from the display unit with respect to the wear of seals.
- the method according to the invention has the advantage that the vacuum pump can perform an independent check of the final pressure at the start. From the final pressure, the evaluation of the vacuum pump can close the wear of the seals.
- the rotational speed is regulated as a function of a measured value given by the at least one pressure sensor. If a high input pressure is measured by the pressure sensor, the speed can be increased. At low inlet pressures, the speed is reduced to achieve optimum pumping speed.
- the speed is set depending on the evaluation result. This may be a switching operation between two or more predetermined speeds. However, this may also be a continuous process in which the engine control electronics changes the speed generated by it as a function of a measured value transmitted to it.
- the vacuum pump automatically performs a reduction in the speed or that a change to a stand-by mode.
- a reduction of the speed then takes place when the signal of the pressure sensor to a pressure below corresponds to the atmospheric pressure.
- this pressure can be a pressure close to the final pressure of the vacuum pump.
- the amounts of gas to be delivered are particularly low, so that the speed can be further reduced.
- the pump advantageously automatically switches to standby mode when the intake pressure has fallen below a certain limit.
- information is displayed on the display with respect to the wear of seals when falling below a predetermined suction pressure.
- Fig. 1 shows a spiral vacuum pump 1 with a first stage 2 and a second stage 3.
- the invention also works with single-stage spiral vacuum pumps.
- the first stage 2 consists of an orbiting disk 4 and a stator 5.
- the orbiting disk 4 carries a spiral 6.
- the stator 5 carries a spiral 7.
- the spirals 6 and 7 are arranged intermeshing.
- the spiral 6 seals to the stator 5.
- the stator 5 may have a so-called hardcoat coating or another hard coating on a mating surface 8.
- the orbiting disk 4 is in three shafts 9, of which in Fig. 1 only two waves are shown orbiting stored.
- the shafts 9 are rotatably mounted in a stator 10 by means of ball bearings 11.
- the second stage 3 also has an orbiting disk 12 and a stator 13.
- the disk 12 carries a spiral 14, the stator 13 carries a spiral 15.
- the spirals 14, 15 are also arranged intermeshing.
- the orbiting disk 12 is ball-mounted by means of the shafts 9 in the stator disk 10.
- the shafts 9 have a shaft portion 16 which is mounted in the stator 10.
- the shafts 9 furthermore each have two shaft sections 17, 18, which have an offset to the shaft section 16. By the offset 17, 18, the orbiting movement of the discs 4, 12 is caused.
- the drive of the orbiting movement by means of an electric motor, which consists of a motor stator 19 and motor orbiter 20.
- the motor orbiter 20 is made according to Fig. 1 made of permanent magnets.
- the motor stator 10 has excitable electromagnets, which cause the orbiting movement of the discs 4, 12 and thus of the spirals 6, 14 with appropriate energization. If the electric motor, that is, the electromagnets 19 of the same is energized, then the electric motor acts as a drive, so that in the spaces between the two spirals 6, 7; 14, 15 arranged gas is compressed. The gas is transported from an inlet 21 of each stage 2, 3 to an outlet 22 and thereby compressed.
- a corrugated bellows 24 is provided in each pumping stage.
- the bellows may also serve, if necessary, as a rotation preventing mechanism.
- a check valve 25 is arranged in each case. The check valve 25 prevents remindbelpartyen the spiral vacuum pump 1 after turning off the drive 18, 19. Thus, a rotation of the spirals 6, 7; 14, 15 are avoided against the specified direction of rotation.
- a gas ballast valve 26 is provided in each pumping stage. Gas is pumped from the atmosphere side into the pump space 23 by the gas ballast valve 26 in order to avoid condensation of the gas to be pumped.
- the corrugated bellows 24 serve only to seal the pump chambers 23. In principle, the bellows 24 can also serve as a rotation prevention mechanism.
- spiral vacuum pump 1 has only one shaft, a rotation preventing mechanism is required. This task can be taken over by the corrugated bellows 24, for example.
- the spiral vacuum pump 1 may also have two or more shafts. With more than two shafts, a rotation prevention mechanism is usually not required.
- the shafts 9 are rotatably mounted in the discs 4, 12 via ball bearings 11.
- the electric motor 19, 20 may also be constructed such that the motor orbiter 20 is made of a soft magnetic material, such as iron.
- the electromagnets arranged in the motor stator 19 can be designed, for example, as coils. In principle, it is also possible to form the motor orbiter 20 from electromagnets and the motor stator 19, for example, from permanent magnets or from a soft magnetic material.
- the spiral 6 carries seals 29.
- the spiral 7 carries seals 30th
- Fig. 2 shows the spiral vacuum pump 1 with the spirals 6 and 7.
- the spirals 6 and 7 form compression spaces 23a, 23b; 54a, 54b; 55a, 55b.
- the one or more pressure sensors can in the compression chambers 23a, 23b; 54a, 54b; 55a, 55b may be arranged.
- in the region of a pump inlet 21 in Fig. 1 ) be provided at least one additional pressure sensor.
- Fig. 3 shows a reciprocating pump 101 with a housing 102.
- the housing 102 receives a shaft bearings 106, 107 rotatably mounted shaft 104.
- the shaft 104 carries permanent magnets 108, which cooperate with stationary coils 110 such that the shaft 104 is rotated. Coils 110 and permanent magnets 108 form in this sense the drive of the reciprocating pump 101.
- the necessary for the rotation energization of the coils 110 is done by an unillustrated control electronics.
- One end of the shaft 104 projects into a crank chamber 112. Connected to this end of the shaft 104 is a crank pulley 114 which carries a crankpin 116.
- a shaft seal 118 to the crank chamber 112 is necessary so that it can be evacuated.
- a cylinder 120 is gas-tightly connected, which receives a bush 122.
- the liner 122 is over a part of its longitudinal axis with a Shrink fit fitted into the bore of the cylinder 120.
- a reciprocating piston 124 which is connected via a connecting rod 126 with the crank pin 116. Through this connection, the reciprocating piston 124 performs a periodic movement.
- the crank mechanism of shaft 104, crank pulley 114 and crankpin 116 causes a reciprocating motion between two reversal points.
- the first reversal point 127 is located between the end of the bushing 122 facing the crank chamber 112 and gas inlet bores 128, which are distributed over the circumference of the bushing 122 and establish a gas connection to an inlet channel 130.
- This inlet channel 130 surrounds the bushing 122 at least in sections in the circumferential direction and in turn is in gas communication with the pump gas inlet 132.
- the second reversal point 133 is located near the end of the bush 122 facing away from the crank chamber 112. It is dimensioned such that the piston 124 touches a valve cover 134 and lifts off from the end of the bushing 122. This end of the bush 122 forms the valve seat on which the valve cover 134 sits in the other phases of Hubkolbenhubes.
- the valve cover 134 is provided with a layer 136 which causes damping of the contact of the valve cover 134 and the reciprocating piston 124 and a seal.
- the valve cover 134 is biased by a valve spring 138 in the direction of sleeve 122.
- a heat conducting body 150 is in heat transferring contact with the bushing 122.
- the material of this heat conducting body 150 has a higher thermal conductivity than the material of the cylinder 120 accommodating the bush 122.
- an aluminum alloy is used for the cylinder 120.
- the heat conducting body 150 forms a heat connection between liner 122 and a space outside of the cylinder 120. It can be cooled by convection of the ambient air or by thermal contact with an external cooling circuit, not shown.
- a space 152 to be evacuated is arranged before the pump gas inlet 132.
- a pressure sensor 51 is arranged before the pump gas inlet 132 (only schematically shown).
- the pressure sensor 51 is designed as a sensor sensitive to gas pressure. This can for example be a Pirani sensor.
- the vacuum pump 101 can automatically switch to a stand-by mode when the suction pressure has fallen below a certain limit.
- a certain pressure value can not be undercut, one can of used piston seals 148 or seals 29 of the in the Fig. 1 and 2 Spiral vacuum pump 1 shown go out.
- Fig. 4 shows a reciprocating pump 31 with a first pumping stage 43 and a second pumping stage 44.
- the reciprocating pump 31 has a gas inlet 45 shown schematically and a gas guide 46 and a gas outlet 47th
- a drive unit 148 displaces the pistons (in Fig. 4 not shown) of the pumping stages 43, 44 in a lifting movement, so that a medium to be conveyed, for example a gas, is transported from the gas inlet 45 via the gas guide 46 in the direction of the gas outlet 47.
- a medium to be conveyed for example a gas
- the drive unit 48 has a motor 49 and a motor drive 50.
- a pressure sensor 51 is arranged in the region of the gas inlet 45.
- the pressure sensor 51 is designed as a sensor sensitive to gas pressure. This sensor may be, for example, a Pirani sensor.
- the vacuum pump 101 can automatically switch to a stand-by mode when the suction pressure has fallen below a certain limit.
- a precise control of the rotational speed of the reciprocating pump 101 is possible. If a certain pressure value can not be undershot, you can of spent piston seals the reciprocating pump 101 or seals 29 of the in the Fig. 1 and 2 Spiral vacuum pump 1 shown go out.
- a signal line 52 leads to an evaluation unit 53, which in turn is connected to a motor drive 50.
- This further embodiment has a valve 54 which, for example, on the intake flange 132 of the reciprocating pump 101 of Fig. 3 is arranged. With the valve 54, the suction flange 132 can be closed, so that the vacuum pump 31, 101 can perform an independent check of the final pressure at startup. From this final pressure, the vacuum pump 31, 101 close to the wear of the piston seals 148. Via a signal line 55, the valve 54 is closed by a controller 56. In the evaluation unit 53 or separately thereof, a display or an LED may be arranged to indicate a necessary maintenance, that is to say a necessary replacement of the seals 42.
- the closing of the valve 54 has the advantage that a final pressure in the region of the suction flange can be determined independently of the recipient.
- valve 54 is opened and the pump 31 is ready for use.
- the vacuum pump 31 in Fig. 4 is shown only by way of example. It may just as well in the arrangement according to Fig. 4 a scroll pump be provided as in Fig. 1 is shown.
- the scroll pump can be constructed in one or more stages.
- Fig. 5 shows the disc 5 of the scroll pump 1 of Fig. 1 with the spiral 7 and the disc 4 with the spiral 6.
- Fig. 5 are several ways of sealing the coils 6, 7 to the discs 4, 5 shown.
- a spiral portion 242 has a textured surface.
- the surface is sawtooth-shaped in cross-section.
- the gap seals the spiral section 242 against a counter-surface 244 of the disk 4.
- a spiral section 245 of the spiral 6 has an elastic carrier material 246 and a seal 247.
- the seal 247 bears against the mating surface 8 and thus seals against the mating surface 8. Due to the elastic carrier material 246, the seal 247 is tracked in case of wear of the seal 247.
- the mating surface 8 advantageously has a so-called hardcoat coating in order to minimize wear.
- a spiral section 248 also has a seal 249.
- the seal 249 is disposed in a channel 250 of the spiral portion 248, that is, in the fixed one Spiral 7. The seal 249 seals against the counter surface 244 from.
- the seal 249 is rectangular in cross section, as in Fig. 5 shown. A length L is greater than a width B of the seal 249. The seal 249 is arranged in the channel 250 such that a gap 251 remains in the region of the narrow side with the width B and a gap 252 in the region of the longitudinal side of the seal 249.
- the seal 249 is designed to be more flexible in the radial direction than in the axial direction.
- 252 passes to be promoted and compressed gas.
- the seal 249 is tracked automatically with wear of the seal, so that a sealing effect between the seal 249 and the counter surface 244 is ensured over a long period.
- the rotational speed of the vacuum pumps 1, 31, 101 can be reduced, so that the wear of the seals 29, 148 is additionally minimized.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Die Erfindung betrifft eine Vakuumpumpe mit wenigstens einer Pumpstufe, einem Motor und einer Motorsteuerung, wobei die Vakuumpumpe als trockenlaufende Vakuumpumpe mit verschleißbehafteten Dichtungen ausgebildet ist, bei der wenigstens ein Drucksensor vor der ersten Pumpstufe und/oder in wenigstens einem Verdichtungsraum angeordnet ist. Darüber hinaus betrifft die Erfindung ein Verfahren zum Betrieb einer Scrollpumpe oder einer Vakuumpumpe mit wenigstens zwei Pumpstufen, bei der im Pumpbetrieb der Drucksensor einen Gasdruck im Ansaugbereich und/oder in wenigstens einem Verdichtungsraum misst, wobei die Messwerte des Drucksensors von einer Auswerteeinheit ausgewertet werden, und die Drehzahl der Pumpe in Abhängigkeit von einem Auswerteergebnis eingestellt wird.The invention relates to a vacuum pump with at least one pumping stage, a motor and a motor control, wherein the vacuum pump is designed as a dry-running vacuum pump with wear-related seals, wherein at least one pressure sensor is arranged in front of the first pumping stage and / or in at least one compression chamber. Moreover, the invention relates to a method for operating a scroll pump or a vacuum pump with at least two pump stages, in which the pressure sensor measures a gas pressure in the intake area and / or in at least one compression space during pumping operation, wherein the measured values of the pressure sensor are evaluated by an evaluation unit, and the speed of the pump is set depending on an evaluation result.
Description
Die Erfindung betrifft eine Vakuumpumpe sowie ein Verfahren zum Betrieb einer Scrollpumpe oder einer Vakuumpumpe mit wenigstens zwei Pumpstufen.The invention relates to a vacuum pump and a method for operating a scroll pump or a vacuum pump with at least two pump stages.
In der Vakuumtechnik werden mit dem Begriff "Vorpumpen" meist gegen Atmosphäre ausstoßende Vakuumpumpen bezeichnet. Diese Bezeichnung geht darauf zurück, dass sie oftmals in Kombination mit solchen Vakuumpumpen verwendet wird, die ein Hochvakuum erzeugen können, dabei aber nicht bis zum Atmosphärendruck verdichten. Ein Beispiel für solch eine Hochvakuumpumpe ist die Turbomolekularpumpe. Beispiele für Vorpumpen sind Vakuumverdrängerpumpen, beispielsweise Drehschieberpumpen und Kolbenpumpen. Sehr oft sind die Vorpumpen mehrstufig ausgeführt, da die mit ihnen kombinierten Hochvakuumpumpen nur einen Druck von wenigen Millibar an ihrem Gasauslass erzeugen und daher ein großer Druckbereich überbrückt werden muss.In vacuum technology, the term "pre-pumping" usually refers to evacuating vacuum pumps. This designation is due to the fact that it is often used in combination with vacuum pumps that can generate a high vacuum but do not compress to atmospheric pressure. An example of such a high vacuum pump is the turbomolecular pump. Examples of backing pumps are vacuum positive displacement pumps, such as rotary vane pumps and piston pumps. Very often, the backing pumps are designed in multiple stages, since the high vacuum pumps combined with them only produce a pressure of a few millibars at their gas outlet and therefore a large pressure range has to be bridged.
Sowohl in der Anwendung als Vorpumpe als auch bei der eigenständigen Erzeugung eines Endvakuums in einem Rezipienten muss die Vorpumpe zunächst große Gasmengen verdichten. Für die gängige Bauform einer Kolbenpumpe bedeutet das, dass sie einen entsprechend groß dimensionierten Schöpfraum aufweisen muss. Die pro Zeiteinheit verdichtbare Gasmenge ist bei diesen Beispielen vom maximalen Schöpfraumvolumen und der Frequenz abhängig, mit der der Schöpfraum von seiner maximalen auf die minimale Größe verändert wird. Fällt wenig Gas an, ist die Vorpumpe in Hinsicht auf Schöpfraumvolumen und Drehzahl überdimensioniert. Von diesen Werten ist allerdings auch die Leistungsaufnahme der Vorpumpe abhängig und es ist wünschenswert, diese zu minimieren.Both in the application as a forepump and in the independent generation of a final vacuum in a recipient, the fore pump must first compress large amounts of gas. For the common design of a piston pump that means that it must have a correspondingly large-sized suction chamber. The per-unit compressible amount of gas in these examples depends on the maximum pumping chamber volume and the frequency with which the pumping chamber is changed from its maximum to the minimum size. If little gas is applied, the fore pump is oversized in terms of the pumping chamber volume and speed. Of these values, however, the power consumption of the backing pump is dependent and it is desirable to minimize these.
Zum Stand der Technik (
Aus dem Stand der Technik (
Gleiches gilt für so genannte Scrollpumpen. Scrollpumpen werden auch Spiralvakuumpumpen oder Spiralfluidfördereinrichtungen genannt. Diese Pumpen arbeiten nach dem Verdrängerprinzip. Eine Spiralvakuumpumpe besteht aus zwei ineinander gesteckten Spiralzylindern (beispielsweise archimedische Spiralen oder Evolvente). Eine dieser Spiralen steht fest, die andere bewegt sich über einen Exzenterantrieb (Exzentergetriebe, Exzenterwelle) auf einer kreisförmigen Bahn. Man spricht von einer zentralsymmetrischen Oszillation ("Wobbeln"). Zwischen den Spiralen entstehen so einzelne abgeschlossene halbmondförmige Hohlräume, die ihr Volumen nach innen immer weiter verkleinern. Dadurch wird das zu pumpende Fluid, beispielsweise Gas, außen angesaugt, innerhalb der Pumpe verdichtet und über eine Öffnung in der Spiralmitte ausgestoßen.The same applies to so-called scroll pumps. Scroll pumps are also called spiral vacuum pumps or spiral fluid conveyors. These pumps work according to the displacement principle. A spiral vacuum pump consists of two nested spiral cylinders (for example Archimedean spirals or involutes). One of these spirals is fixed, the other moves on an eccentric drive (eccentric, eccentric shaft) on a circular path. One speaks of a centrally symmetric oscillation ("wobbling"). As a result, individual closed crescent-shaped cavities form between the spirals, reducing their volume further and further inwards. As a result, the fluid to be pumped, for example gas, is drawn in from the outside, compressed inside the pump and ejected through an opening in the center of the coil.
Die Höhe der Spiralwände, deren Abstand sowie die Drehzahl definieren die Saugleistung einer Spiralvakuumpumpe.The height of the spiral walls, their distance and the speed define the suction power of a spiral vacuum pump.
Zwischen den die Struktur der Spirale bildenden Spiralzylindern und der Auflagefläche auf der Statorseite sind Dichtungen angeordnet, die mit dem Stator in einem Reibkontakt stehen. Diese Dichtungen verschleißen im Laufe der Zeit. Bei einem Verschleiß werden die Hohlräume undicht und die Saugleistung der Spiralvakuumpumpe nimmt ab.Between the spiral cylinder forming the structure of the spiral and the bearing surface on the stator side seals are arranged, which are in frictional contact with the stator. These seals wear out over time. When worn, the cavities are leaking and the suction power of the spiral vacuum pump decreases.
Das der Erfindung zugrunde liegende technische Problem besteht darin, diese zum Stand der Technik gehörende Vakuumpumpe dahingehend weiter zu verbessern, dass die Standzeit von verschleißbehafteten Dichtungen in der Vakuumpumpe erhöht wird. Darüber hinaus soll ein Verfahren angegeben werden, mit dem der Verschleiß von Dichtungen in der Vakuumpumpe frühzeitig detektiert werden kann.The technical problem underlying the invention is this, belonging to the prior art vacuum pump to further improve that the life of weary seals in the vacuum pump is increased. In addition, a method is to be specified with which the wear of seals in the vacuum pump can be detected early.
Dieses technische Problem wird durch eine Vakuumpumpe mit den Merkmalen gemäß Anspruch 1 sowie durch ein Verfahren mit den Merkmalen gemäß Anspruch 8 sowie durch ein Verfahren mit den Merkmalen gemäß Anspruch 9 gelöst.This technical problem is solved by a vacuum pump having the features according to
Die erfindungsgemäße Vakuumpumpe mit wenigstens einer Pumpstufe, einem Motor und einer Motorsteuerung, wobei die Vakuumpumpe als trockenlaufende Pumpe mit verschleißbehafteten Dichtungen ausgebildet ist, zeichnet sich dadurch aus, dass wenigstens ein Drucksensor vor der ersten Pumpstufe und/oder in wenigstens einem Verdichtungsraum der Vakuumpumpe angeordnet ist und dass der Drucksensor mit einer Auswerteeinheit verbunden ist.The vacuum pump according to the invention with at least one pumping stage, a motor and a motor control, wherein the vacuum pump is designed as a dry-running pump with wear-related seals, is characterized in that at least one pressure sensor is arranged before the first pumping stage and / or in at least one compression chamber of the vacuum pump and that the pressure sensor is connected to an evaluation unit.
Die erfindungsgemäße Vakuumpumpe kann als Kolbenpumpe, beispielsweise Hubkolbenpumpe ausgebildet sein. Diese Hubkolbenpumpe weist wenigstens eine Pumpstufe auf. Die erfindungsgemäße Vakuumpumpe kann auch als Scrollpumpe mit wenigstens einer Pumpstufe ausgebildet sein.The vacuum pump according to the invention can be designed as a piston pump, for example a reciprocating piston pump. This reciprocating pump has at least one pumping stage. The vacuum pump according to the invention can also be designed as a scroll pump with at least one pumping stage.
Durch die erfindungsgemäße Anordnung des wenigstens einen Drucksensors vor der ersten Pumpstufe und/oder in wenigstens einem Verdichtungsraum der Vakuumpumpe ist es möglich, eine genauere Messung des erzeugbaren Druckes durchzuführen, wodurch eine genauere Steuerung der Drehzahl möglich ist als mit einem Druckschalter zwischen den Pumpstufen.The inventive arrangement of the at least one pressure sensor before the first pumping stage and / or in at least one compression chamber of the vacuum pump, it is possible to perform a more accurate measurement of the producible pressure, whereby a more accurate control of the speed is possible than with a pressure switch between the pumping stages.
Kann ein bestimmter Druckwert nicht mehr unterschritten werden, kann von verbrauchten Dichtungen ausgegangen werden.If a certain pressure value can no longer be undershot, it can be assumed that the seals are worn out.
Gemäß einer vorteilhaften Ausführungsform der Erfindung ist der wenigstens eine Drucksensor im Ansaugbereich der Vakuumpumpe angeordnet. Hierdurch ist eine sehr genaue Steuerung der Drehzahl möglich, da mit dem Drucksensor erfasst werden kann, wie groß der Ansaugdruck der Vakuumpumpe ist.According to an advantageous embodiment of the invention, the at least one pressure sensor is arranged in the intake region of the vacuum pump. As a result, a very accurate control of the speed is possible because it can be detected with the pressure sensor, how large the suction pressure of the vacuum pump.
Eine weitere besonders bevorzugte Ausführungsform der Erfindung sieht vor, dass ein zusätzliches Ventil zum Verschließen einer Ansaugöffnung der Vakuumpumpe vorgesehen ist.Another particularly preferred embodiment of the invention provides that an additional valve for closing a suction opening of the vacuum pump is provided.
Die Vakuumpumpe weist eine Ansaugöffnung auf. Die Ansaugöffnung ist mit einem Rezipienten verbunden.The vacuum pump has an intake opening. The suction port is connected to a recipient.
Diese Ansaugöffnung wird gemäß der bevorzugten Ausführungsform der Erfindung durch ein zusätzliches Ventil verschlossen. Durch das Verschließen des Ventils kann die Vakuumpumpe, beispielsweise beim Anschalten der Vakuumpumpe, eine selbstständige Überprüfung des Enddruckes durchführen. Von diesem Enddruck kann die Vakuumpumpe auf den Verschleiß der Dichtungen, das heißt der Kolbendichtungen oder der Dichtungen der Scrollpumpe schließen.This suction port is closed by an additional valve according to the preferred embodiment of the invention. By closing the valve, the vacuum pump, for example, when you turn on the vacuum pump, perform an independent review of the final pressure. From this final pressure, the vacuum pump can close on the wear of the seals, that is, the piston seals or the seals of the scroll pump.
Der Enddruck wird hierbei in dem relativ begrenzten und kleinen Raum des Ansaugflansches überprüft. Die Messung erfolgt unabhängig von dem Rezipienten.The final pressure is checked here in the relatively limited and small space of the intake flange. The measurement is independent of the recipient.
Gemäß einer weiteren vorteilhaften Ausführungsform der Erfindung ist vorgesehen, dass der wenigstens eine Sensor als Pirani-Sensor ausgebildet ist. Pirani-Sensoren sind sehr zuverlässig arbeitende Sensoren.According to a further advantageous embodiment of the invention it is provided that the at least one sensor is designed as a Pirani sensor. Pirani sensors are very reliable sensors.
Es ist jedoch auch möglich, andere Druckmessgeräte als Pirani-Sensoren einzusetzen.However, it is also possible to use other pressure gauges than Pirani sensors.
Eine weitere vorteilhafte Ausführungsform der Erfindung sieht vor, dass eine Anzeigevorrichtung zur Anzeige einer Fehl- und/oder Minderleistung der Vakuumpumpe vorgesehen ist. Wird beispielsweise beim Verschließen des zusätzlichen Ventiles zum Verschließen der Ansaugöffnung der Vakuumpumpe ein vorgegebener Enddruck nicht erreicht, kann davon ausgegangen werden, dass die Dichtungen einem gewissen Grad an Verschleiß unterliegen. Diese Minderleistung wird vorteilhaft in der Anzeigevorrichtung angezeigt, so dass der Nutzer der Vakuumpumpe den aktuellen Druckwert ablesen kann.A further advantageous embodiment of the invention provides that a display device for indicating a faulty and / or reduced power of the vacuum pump is provided. For example, if a predetermined final pressure is not reached when closing the additional valve to close the suction port of the vacuum pump, it can be assumed that the seals are subject to a certain degree of wear. This reduced power is advantageously displayed in the display device, so that the user of the vacuum pump can read the current pressure value.
Auf der Anzeigevorrichtung kann der Nutzer auch darauf hingewiesen werden, dass eine notwendige Wartung der Vakuumpumpe vorzunehmen ist. Die Anzeigevorrichtung kann ein Display oder wenigstens eine LED aufweisen. Es können auch akustische Signale abgegeben werden.On the display device, the user can also be advised that a necessary maintenance of the vacuum pump is to be made. The display device may have a display or at least one LED. It can also be emitted acoustic signals.
Die Vakuumpumpe ist vorteilhaft als Scrollpumpe ausgebildet. Bei einer Scrollpumpe handelt es sich um eine trockenlaufende Pumpe. Trockenlaufende Pumpen sind Pumpen, die im Bereich des Arbeitsraumes auf Hilfsfluide, wie zum Beispiel Öl, verzichten und bei denen dadurch eine Verunreinigung des Arbeitsmediums vermieden werden kann.The vacuum pump is advantageously designed as a scroll pump. A scroll pump is a dry-running pump. Dry-running pumps are pumps which do without auxiliary fluids, such as oil, in the area of the working space and which can thereby avoid contamination of the working medium.
Das erfindungsgemäße Verfahren zum Betrieb einer Scrollpumpe oder einer Vakuumpumpe mit wenigstens zwei Pumpstufen zeichnet sich dadurch aus, dass im Pumpbetrieb der Drucksensor einen Gasdruck im Ansaugbereich und/oder in wenigstens einem Verdichtungsraum der Vakuumpumpe misst, dass der oder die Messwerte des Drucksensors von einer Auswerteeinheit ausgewertet wird oder werden und dass die Drehzahl der Pumpe in Abhängigkeit von einem Auswerteergebnis eingestellt wird.The inventive method for operating a scroll pump or a vacuum pump with at least two pumping stages is characterized in that in pumping the pressure sensor, a gas pressure in the intake and / or in measures at least one compression space of the vacuum pump that the one or more measured values of the pressure sensor is evaluated by an evaluation unit and that the speed of the pump is set in dependence on an evaluation result.
Das erfindungsgemäße Verfahren weist den Vorteil auf, dass durch die Messung des erreichbaren Druckes, das heißt des Gasdruckes im Ansaugbereich und/oder in wenigstens einem Verdichtungsraum der Vakuumpumpe, der Zustand der Pumpe, insbesondere der Dichtungen genau erfasst werden kann. Der oder die Messwerte des Drucksensors werden hierzu von einer Auswerteeinheit ausgewertet. In der Auswerteeinheit ist vorteilhaft abgespeichert, in welchem Bereich die Messwerte idealerweise liegen. In Abhängigkeit von dem Auswerteergebnis wird die Drehzahl der Pumpe eingestellt.The method according to the invention has the advantage that by measuring the achievable pressure, that is to say the gas pressure in the intake region and / or in at least one compression chamber of the vacuum pump, the state of the pump, in particular of the seals, can be accurately detected. The measured value (s) of the pressure sensor are evaluated by an evaluation unit for this purpose. In the evaluation unit is advantageously stored, in which range the measured values are ideally. Depending on the evaluation result, the speed of the pump is set.
Beispielsweise werden bei hohen Eingangsdrücken hohe Drehzahlen und bei niedrigen Eingangsdrücken niedrige Drehzahlen eingestellt, um ein optimales Saugvermögen zu realisieren.For example, high speeds are set at high input pressures and low speeds at low input pressures to achieve optimum pumping speed.
Ein weiteres erfindungsgemäßes Verfahren zum Betrieb einer Vakuumpumpe mit wenigstens zwei Pumpstufen oder einer Scrollpumpe zeichnet sich dadurch aus, dass beim Start der Vakuumpumpe ein Ventil, welches einen Ansaugbereich vom Rezipienten trennt, geschlossen wird, dass der Drucksensor einen Gasdruck im gegen den Rezipienten geschlossenen Ansaugbereich und/oder in wenigstens einem Verdichtungsraum der Vakuumpumpe misst, dass der oder die Messwerte des Drucksensors von einer Auswerteeinheit ausgewertet werden und dass in Abhängigkeit von einem Auswerteergebnis eine Information von der Anzeigeeinheit bezüglich des Verschleißes von Dichtungen ausgegeben wird.Another inventive method for operating a vacuum pump with at least two pumping stages or a scroll pump is characterized in that when starting the vacuum pump, a valve which separates a suction from the recipient is closed, that the pressure sensor is a gas pressure in the closed against the recipient intake and / or measures in at least one compression chamber of the vacuum pump, that the one or more measured values of the pressure sensor are evaluated by an evaluation and that depending on an evaluation result, information is output from the display unit with respect to the wear of seals.
Das erfindungsgemäße Verfahren weist den Vorteil auf, dass die Vakuumpumpe beim Start eine selbstständige Überprüfung des Enddruckes durchführen kann. Von dem Enddruck kann die Auswerteeinheit der Vakuumpumpe auf den Verschleiß der Dichtungen schließen.The method according to the invention has the advantage that the vacuum pump can perform an independent check of the final pressure at the start. From the final pressure, the evaluation of the vacuum pump can close the wear of the seals.
Gemäß einer besonders bevorzugten Ausführungsform der Erfindung wird die Drehzahl in Abhängigkeit von einem durch den wenigstens einen Drucksensor gegebenen Messwert geregelt. Wird von dem Drucksensor ein hoher Eingangsdruck gemessen, kann die Drehzahl erhöht werden. Bei niedrigen Eingangsdrücken wird die Drehzahl herabgesetzt, um ein optimales Saugvermögen zu realisieren.According to a particularly preferred embodiment of the invention, the rotational speed is regulated as a function of a measured value given by the at least one pressure sensor. If a high input pressure is measured by the pressure sensor, the speed can be increased. At low inlet pressures, the speed is reduced to achieve optimum pumping speed.
Gemäß einer weiteren vorteilhaften Ausführungsform der Erfindung ist vorgesehen, dass abhängig von dem durch den wenigstens einen Drucksensor gegebenen Messwert zwischen zwei Drehzahlen geschaltet wird.According to a further advantageous embodiment of the invention it is provided that is switched depending on the given by the at least one pressure sensor reading between two speeds.
In einer Motorsteuerung wird die Drehzahl abhängig von dem Auswerteergebnis eingestellt. Dies kann ein Umschaltvorgang zwischen zwei oder mehreren vorgegebenen Drehzahlen sein. Es kann sich hierbei jedoch auch um einen kontinuierlichen Vorgang handeln, bei dem die Motorsteuerungselektronik abhängig von einem ihr übermittelten Messwert die von ihr erzeugte Drehzahl verändert.In a motor control, the speed is set depending on the evaluation result. This may be a switching operation between two or more predetermined speeds. However, this may also be a continuous process in which the engine control electronics changes the speed generated by it as a function of a measured value transmitted to it.
Gemäß einer besonders bevorzugten Ausführungsform der Erfindung ist vorgesehen, dass bei Unterschreiten eines vorgegebenen Ansaugdruckes die Vakuumpumpe selbsttätig eine Absenkung der Drehzahl durchführt oder dass ein Wechseln in einen Stand-by-Modus erfolgt.According to a particularly preferred embodiment of the invention, it is provided that falls below a predetermined suction pressure, the vacuum pump automatically performs a reduction in the speed or that a change to a stand-by mode.
Vorteilhaft erfolgt eine Absenkung der Drehzahl dann, wenn das Signal des Drucksensors zu einem Druck unterhalb des Atmosphärendruckes korrespondiert. Dieser Druck kann in einer vorteilhaften Weiterbildung ein Druck nahe des Enddruckes der Vakuumpumpe sein. Die zu fördernden Gasmengen sind hierbei besonders gering, so dass die Drehzahl weiter abgesenkt werden kann. Durch das Absenken der Drehzahl können die verschleißbehafteten Dichtungen geschont werden, so dass die Standzeit der Dichtungen deutlich erhöht wird.Advantageously, a reduction of the speed then takes place when the signal of the pressure sensor to a pressure below corresponds to the atmospheric pressure. In an advantageous development, this pressure can be a pressure close to the final pressure of the vacuum pump. The amounts of gas to be delivered are particularly low, so that the speed can be further reduced. By lowering the speed of the wear-prone seals can be spared, so that the service life of the seals is significantly increased.
Die Pumpe wechselt vorteilhaft selbstständig in den Stand-by-Modus, wenn der Ansaugdruck einen bestimmten Grenzwert unterschritten hat.The pump advantageously automatically switches to standby mode when the intake pressure has fallen below a certain limit.
Gemäß einer weiteren vorteilhaften Ausführungsform wird bei Unterschreiten eines vorgegebenen Ansaugdruckes eine Information auf der Anzeige bezüglich des Verschleißes von Dichtungen angezeigt. Diese Ausführungsform weist den Vorteil auf, dass der Nutzer der Pumpe erkennen kann, wann die Dichtungen verschlissen sind und ausgetauscht werden müssen, um das optimale Saugvermögen der Pumpe zu gewährleisten.According to a further advantageous embodiment, information is displayed on the display with respect to the wear of seals when falling below a predetermined suction pressure. This embodiment has the advantage that the user of the pump can recognize when the seals are worn and need to be replaced in order to ensure the optimum pumping speed of the pump.
Weitere Merkmale und Vorteile der Erfindung ergeben sich anhand der zugehörigen Zeichnung, in der mehrere Ausführungsbeispiele eines erfindungsgemäßen Gehäuses einer Wälzkolbenpumpe nur beispielhaft dargestellt sind. In der Zeichnung zeigen:
- Fig. 1
- einen Längsschnitt durch eine Scrollpumpe;
- Fig. 2
- einen Querschnitt durch zwei orbitierende Scheiben einer Scrollpumpe;
- Fig. 3
- einen Längsschnitt durch eine Hubkolbenpumpe;
- Fig. 4
- eine erfindungsgemäße Anordnung eines Drucksensors;
- Fig. 5
- einen Querschnitt durch verschiedene Dichtungen.
- Fig. 1
- a longitudinal section through a scroll pump;
- Fig. 2
- a cross section through two orbiting discs of a scroll pump;
- Fig. 3
- a longitudinal section through a reciprocating pump;
- Fig. 4
- an inventive arrangement of a pressure sensor;
- Fig. 5
- a cross section through different seals.
Die zweite Stufe 3 weist ebenfalls eine orbitierende Scheibe 12 sowie einen Stator 13 auf. Die Scheibe 12 trägt eine Spirale 14, der Stator 13 trägt eine Spirale 15. Die Spiralen 14, 15 sind ebenfalls ineinandergreifend angeordnet. Die orbitierende Scheibe 12 ist mittels der Wellen 9 in der Statorscheibe 10 kugelgelagert. Die Wellen 9 weisen einen Wellenabschnitt 16 auf, der in dem Stator 10 gelagert ist. Die Wellen 9 weisen darüber hinaus jeweils zwei Wellenabschnitte 17, 18 auf, die einen Versatz zu dem Wellenabschnitt 16 aufweisen. Durch den Versatz 17, 18 wird die orbitierende Bewegung der Scheiben 4, 12 verursacht.The
Der Antrieb der orbitierenden Bewegung erfolgt mittels eines Elektromotors, der aus einem Motorstator 19 und Motororbiter 20 besteht. Der Motororbiter 20 besteht gemäß
Zur Abdichtung von Pumpräumen 23 ist in jeder Pumpstufe jeweils ein Wellbalg 24 vorgesehen. Der Wellbalg kann auch, sofern erforderlich, als Drehverhinderungsmechanismus dienen. In den Auslässen 22 ist jeweils ein Rückschlagventil 25 angeordnet. Das Rückschlagventil 25 verhindert ein Zurückbelüften der Spiralvakuumpumpe 1 nach dem Ausschalten des Antriebes 18, 19. Somit kann ein Drehen der Spiralen 6, 7; 14, 15 entgegen der festgelegten Drehrichtung vermieden werden.For sealing
Darüber hinaus ist ein Gasballastventil 26 in jeder Pumpstufe vorgesehen. Durch das Gasballastventil 26 wird von Atmosphärenseite in den Pumpraum 23 Gas gepumpt, um eine Kondensation des zu pumpenden Gases zu vermeiden.In addition, a
Durch die Relativbewegung der Spiralen 5, 6; 14, 15 und der damit verbundenen Reibung entsteht in Verbindung mit der Kompression des Gases eine nicht unerhebliche Abwärme. Hohe Temperaturen tragen zu einem erhöhten Verschleiß der Bauteile, insbesondere von Dichtungen (in
Da die orbitierenden Scheiben 4, 12 mittels drei Wellen 9 gelagert sind, wird keine Drehverhinderungsvorrichtung benötigt. Die Wellbalge 24 dienen lediglich zur Abdichtung der Pumpräume 23. Grundsätzlich können die Wellbalge 24 auch als Drehverhinderungsmechanismus dienen.Since the orbiting
Weist die Spiralvakuumpumpe 1 lediglich eine Welle auf, ist ein Drehverhinderungsmechanismus erforderlich. Diese Aufgabe kann beispielsweise von dem Wellbalg 24 übernommen werden. Die Spiralvakuumpumpe 1 kann auch zwei oder mehr Wellen aufweisen. Bei mehr als zwei Wellen ist ein Drehverhinderungsmechanismus üblicherweise nicht erforderlich.If the
Die Wellen 9 sind über Kugellager 11 drehbar in den Scheiben 4, 12 gelagert.The
Der Elektromotor 19, 20 kann auch derart aufgebaut sein, dass der Motororbiter 20 aus einem weichmagnetischen Material, beispielsweise Eisen besteht. Die im Motorstator 19 angeordneten Elektromagnete können beispielsweise als Spulen ausgebildet sein. Grundsätzlich besteht auch die Möglichkeit, die Motororbiter 20 aus Elektromagneten zu bilden und den Motorstator 19 beispielsweise aus Permanentmagneten oder aus einem weichmagnetischen Material.The
Die Spirale 6 trägt Dichtungen 29. Die Spirale 7 trägt Dichtungen 30.The
Es besteht auch die Möglichkeit, jeweils einen Drucksensor in gegenüberliegenden Verdichtungsräumen 23a, 23b; 54a, 54b; 55a, 55b oder in angrenzenden Verdichtungsräumen 23a, 54a, 55a; 23b, 54b, 55b anzuordnen. Durch die jeweilige Druckdifferenz lässt sich ein entsprechendes Auswertesignal erzeugen.It is also possible, in each case a pressure sensor in
Mit dem Gehäuse 102 ist ein Zylinder 120 gasdicht verbunden, welcher eine Laufbuchse 122 aufnimmt. Die Laufbuchse 122 ist über einen Teil ihrer Längsachse mit einem Schrumpfsitz in die Bohrung des Zylinders 120 eingepasst. In der Laufbuchse 122 befindet sich ein Hubkolben 124, der über einen Pleuel 126 mit dem Kurbelzapfen 116 verbunden ist. Durch diese Verbindung führt der Hubkolben 124 eine periodische Bewegung aus. In dem in
Der erste Umkehrpunkt 127 liegt zwischen dem dem Kurbelraum 112 zugewandten Ende der Laufbuchse 122 und Gaseinlassbohrungen 128, die über den Umfang der Laufbuchse 122 verteilt vorgesehen sind und eine Gasverbindung zu einem Einlasskanal 130 herstellen. Dieser Einlasskanal 130 umgibt die Laufbuchse 122 wenigstens abschnittsweise in Umfangsrichtung und steht wiederum in Gasverbindung mit dem Pumpengaseinlass 132.The
Der zweite Umkehrpunkt 133 liegt nahe dem dem Kurbelraum 112 abgewandten Ende der Laufbuchse 122. Er ist so bemessen, dass der Hubkolben 124 einen Ventildeckel 134 berührt und vom Ende der Laufbuchse 122 abhebt. Dieses Ende der Laufbuchse 122 bildet den Ventilsitz, auf dem der Ventildeckel 134 in den anderen Phasen des Hubkolbenhubes sitzt. Der Ventildeckel 134 ist mit einer Schicht 136 versehen, die eine Dämpfung der Berührung von Ventildeckel 134 und Hubkolben 124 und eine Abdichtung bewirkt. Der Ventildeckel 134 ist durch eine Ventilfeder 138 in Richtung Laufbuchse 122 vorgespannt. Befindet sich der Hubkolben 124 in der Nähe des zweiten Umkehrpunktes 133, wird Gas aus einem Schöpfraum 140 in eine Auslasskammer 142 ausgestoßen. Von dort gelangt es dann zu einem Pumpengasauslass 144, der zusammen mit der Auslasskammer 142, Ventildeckel 134 und Ventilfeder 138 in einem mit dem Zylinder 120 gasdicht verbundenen Zylinderdeckel 146 angeordnet ist. Zwischen Laufbuchseninnenwand und Hubkolben 124 ist eine Dichtung 148 angeordnet. Diese dichtet den Spalt zwischen Laufbuchse 122 und Hubkolben 124 und damit den Schöpfraum 140 gegen den Kurbelraum 112 ab. Diese Dichtung 148 ist durch die Reibung an der Laufbuchseninnenwand Verschleiß ausgesetzt. Ein Wärmeleitkörper 150 steht in Wärme übertragendem Kontakt mit der Laufbuchse 122. Das Material dieses Wärmeleitkörpers 150 weist eine höhere Wärmeleitzahl auf als das Material des die Laufbuchse 122 aufnehmenden Zylinders 120. Typischerweise wird für den Zylinder 120 eine Aluminiumlegierung verwendet. Als Material für den Wärmeleitkörper ist Kupfer geeignet. Andere Materialien mit noch höherer Wärmeleitzahl als Kupfer sind vorteilhaft verwendbar. Der Wärmeleitkörper 150 bildet eine Wärmeverbindung zwischen Laufbuchse 122 und einem Raum außerhalb des Zylinders 120. Er kann durch Konvektion der Umgebungsluft oder durch Wärmekontakt mit einem nicht gezeigten externen Kühlkreislauf gekühlt werden.The
Vor dem Pumpengaseinlass 132 ist ein zu evakuierender Raum 152 angeordnet. Unmittelbar vor dem Pumpengaseinlass 132 ist (lediglich schematisch dargestellt) ein Drucksensor 51 angeordnet.Before the
Der Drucksensor 51 ist als gasdruckempfindlicher Sensor ausgebildet. Dieser kann beispielsweise ein Pirani-Sensor sein.The
Durch die Anordnung des Drucksensors 51 im Bereich des Gaseinlasses 132 kann die Vakuumpumpe 101 selbstständig in einen Stand-by-Modus wechseln, wenn der Ansaugdruck einen bestimmten Grenzwert unterschritten hat. Durch die Messung direkt im Ansaugbereich 152 ist eine genaue Steuerung der Drehzahl der Hubkolbenpumpe101 möglich. Kann ein bestimmter Druckwert nicht unterschritten werden, kann man von verbrauchten Kolbendichtungen 148 oder Dichtungen 29 der in den
Von dem Drucksensor 51 führt eine lediglich schematisch dargestellte Signalleitung 52 zu einer ebenfalls lediglich schematisch dargestellten Auswerteeinheit 53, die wiederum mit einer Motoransteuerung 50 in Verbindung steht. Mit der bisher beschriebenen Ausführungsform ist es möglich, einen Verschleiß der Dichtungen 29, 148 zu detektieren und entweder eine Wartung durchzuführen oder die Drehzahl der Pumpe 101 herabzusetzen.Of the
Eine Antriebseinheit 148 versetzt die Kolben (in
Die Antriebseinheit 48 weist einen Motor 49 auf sowie eine Motoransteuerung 50.The
Im Bereich des Gaseinlasses 45 ist ein Drucksensor 51 angeordnet. Der Drucksensor 51 ist als gasdruckempfindlicher Sensor ausgebildet. Dieser Sensor kann beispielsweise ein Pirani-Sensor sein.In the region of the
Durch die Anordnung des Drucksensors 51 im Bereich des Gaseinlasses 132 kann die Vakuumpumpe 101 selbstständig in einen Stand-by-Modus wechseln, wenn der Ansaugdruck einen bestimmten Grenzwert unterschritten hat. Durch die Messung direkt im Ansaugbereich 152 ist eine genaue Steuerung der Drehzahl der Hubkolbenpumpe 101 möglich. Kann ein bestimmter Druckwert nicht unterschritten werden, kann man von verbrauchten Kolbendichtungen der Hubkolbenpumpe 101 oder Dichtungen 29 der in den
Von dem Drucksensor 51 führt eine Signalleitung 52 zu einer Auswerteeinheit 53, die wiederum mit einer Motoransteuerung 50 in Verbindung steht. Mit der bisher beschriebenen Ausführungsform ist es möglich, einen Verschleiß der Dichtungen 29, 148 zu detektieren und entweder eine Wartung durchzuführen oder die Drehzahl der Pumpe 1, 31, 101 herabzusetzen.From the
Optional ist im Folgenden eine weitere Ausführungsform beschrieben. Diese weitere Ausführungsform weist ein Ventil 54 auf, welches beispielsweise am Ansaugflansch 132 der Hubkolbenpumpe 101 der
Das Verschließen des Ventiles 54 weist den Vorteil auf, dass ein Enddruck im Bereich des Ansaugflansches unabhängig von dem Rezipienten ermittelt werden kann.The closing of the
Ist die Selbstdiagnose abgeschlossen, wird das Ventil 54 geöffnet und die Pumpe 31 ist einsatzbereit.If the self-diagnosis is completed, the
Die Vakuumpumpe 31 in
Die Scrollpumpe kann einstufig oder mehrstufig aufgebaut sein.The scroll pump can be constructed in one or more stages.
Ein Spiralabschnitt 242 weist eine strukturierte Oberfläche auf. Im vorliegenden Fall ist die Oberfläche im Querschnitt sägezahnartig ausgebildet. Durch einen entsprechend gewählten engen Spalt 243 dichtet der Spalt den Spiralabschnitt 242 gegenüber einer Gegenfläche 244 der Scheibe 4 ab.A
Ein Spiralabschnitt 245 der Spirale 6 weist ein elastisches Trägermaterial 246 auf sowie eine Dichtung 247. Die Dichtung 247 liegt an der Gegenfläche 8 an und dichtet so gegen die Gegenfläche 8 ab. Durch das elastische Trägermaterial 246 wird die Dichtung 247 bei Verschleiß der Dichtung 247 nachgeführt. Die Gegenfläche 8 weist vorteilhaft eine so genannte Hardcoat-Beschichtung auf, um den Verschleiß zu minimieren.A
Ein Spiralabschnitt 248 weist ebenfalls eine Dichtung 249 auf. Die Dichtung 249 ist in einem Kanal 250 des Spiralabschnittes 248 angeordnet, das heißt in der feststehenden Spirale 7. Die Dichtung 249 dichtet gegen die Gegenfläche 244 ab.A
Die Dichtung 249 ist im Querschnitt rechteckförmig ausgebildet, wie in
Das bedeutet, dass die Dichtung 249 in radialer Richtung flexibler ausgebildet ist als in axialer Richtung. In die Spalte 251, 252 gelangt das zu fördernde und komprimierende Gas. Hierdurch wird die Dichtung 249 bei Verschleiß der Dichtung automatisch nachgeführt, so dass eine Dichtwirkung zwischen der Dichtung 249 und der Gegenfläche 244 über einen langen Zeitraum gewährleistet ist.This means that the
Wird ein vorgegebener Eingangsdruck im Bereich des Drucksensors 51 gemessen, kann die Drehzahl der Vakuumpumpen 1, 31, 101 herabgesetzt werden, so dass der Verschleiß der Dichtungen 29, 148 zusätzlich minimiert wird.If a predetermined inlet pressure in the region of the
- 11
- SpiralvakuumpumpeScroll vacuum pump
- 22
- Pumpstufepump stage
- 33
- Pumpstufepump stage
- 44
- orbitierende Scheibeorbiting disc
- 55
- Statorstator
- 66
- Spiralespiral
- 77
- Spiralespiral
- 88th
- Gegenflächecounter surface
- 99
- Wellewave
- 1010
- Statorstator
- 1111
- Kugellagerball-bearing
- 1212
- orbitierende Scheibeorbiting disc
- 1313
- Statorstator
- 1414
- Spiralespiral
- 1515
- Spiralespiral
- 1616
- Wellenabschnittshaft section
- 1717
- Wellenabschnittshaft section
- 1818
- Wellenabschnittshaft section
- 1919
- Motorstatormotor stator
- 2020
- Motororbitermotor Orbiter
- 2121
- Einlassinlet
- 2222
- Auslassoutlet
- 2323
- Pumpräumepump chambers
- 23a23a
- Verdichtungsraumcompression chamber
- 23b23b
- Verdichtungsraumcompression chamber
- 2424
- Wellbalgbellows
- 2525
- Rückschlagventilcheck valve
- 2626
- GasballastventilGas ballast valve
- 2727
- Gegenflächecounter surface
- 2828
- LüfterFan
- 2929
- Dichtungpoetry
- 3030
- Dichtungpoetry
- 3131
- Hubkolbenpumpereciprocating pump
- 4343
- Pumpstufepump stage
- 4444
- Pumpstufepump stage
- 4545
- Gaseinlassgas inlet
- 4646
- Gasführunggas guide
- 4747
- Gasauslassgas outlet
- 4848
- Antriebseinheitdrive unit
- 4949
- Motorengine
- 5050
- Motoransteuerungmotor Controller
- 5151
- Drucksensorpressure sensor
- 5252
- Signalleitungsignal line
- 5353
- Auswerteeinheitevaluation
- 54a54a
- Verdichtungsraumcompression chamber
- 54b54b
- Verdichtungsraumcompression chamber
- 55a55a
- Verdichtungsraumcompression chamber
- 55b55b
- Verdichtungsraumcompression chamber
- 101101
- KolbenvakuumpumpeVacuum pump
- 102102
- Gehäusecasing
- 104104
- Wellewave
- 106106
- Wellenlagershaft bearing
- 107107
- Wellenlagershaft bearing
- 108108
- Permanentmagnetepermanent magnets
- 110110
- SpulenDo the washing up
- 112112
- Kurbelraumcrankcase
- 114114
- Kurbelscheibecrank
- 116116
- Kurbelzapfencrank pin
- 118118
- Wellendichtungshaft seal
- 120120
- Zylindercylinder
- 122122
- Laufbuchseliner
- 124124
- Hubkolbenreciprocating
- 126126
- Pleuelpleuel
- 127127
- erster Umkehrpunktfirst reversal point
- 128128
- GaseinlassbohrungenGas inlet holes
- 130130
- Einlasskanalinlet channel
- 133133
- zweiter Umkehrpunktsecond reversal point
- 134134
- Ventildeckelvalve cover
- 136136
- Schichtlayer
- 138138
- Ventilfedervalve spring
- 140140
- Schöpfraumsuction chamber
- 142142
- Auslasskammeroutlet
- 144144
- PumpengasauslassPumpengasauslass
- 146146
- Zylinderdeckelcylinder cover
- 148148
- Dichtungpoetry
- 150150
- Wärmeleitkörperthermal conductors
- 152152
- Rezipientrecipient
- 154154
- Leitungmanagement
- 242242
- Dichtungenseals
- 243243
- Spaltgap
- 244244
- Gegenflächecounter surface
- 245245
- Spiralabschnittspiral section
- 246246
- elastisches Trägermaterialelastic carrier material
- 247247
- Dichtungpoetry
- 248248
- Spiralabschnittspiral section
- 249249
- Dichtungpoetry
- 250250
- Kanalchannel
- 251251
- Spaltgap
- 252252
- Spaltgap
- AA
- Pfeilearrows
- BB
- Breitewidth
- LL
- Längelength
Claims (13)
dadurch gekennzeichnet, dass wenigstens ein Drucksensor (51) vor der ersten Pumpstufe (43) und/oder in wenigstens einem Verdichtungsraum (23a, 23b; 54a, 54b; 55a, 55b) der Vakuumpumpe angeordnet ist, und dass der Drucksensor (51) mit einer Auswerteeinheit (53) verbunden ist.Vacuum pump with at least one pump stage, a motor and a motor controller, wherein the vacuum pump is designed as a dry-running vacuum pump with weary seals,
characterized in that at least one pressure sensor (51) is arranged in front of the first pumping stage (43) and / or in at least one compression chamber (23a, 23b; 54a, 54b; 55a, 55b) of the vacuum pump, and in that the pressure sensor (51) an evaluation unit (53) is connected.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15158724.3A EP3067560B1 (en) | 2015-03-12 | 2015-03-12 | Vacuum pump with at least one pump stage |
JP2016039622A JP6188850B2 (en) | 2015-03-12 | 2016-03-02 | Method for operating a vacuum pump or scroll pump having at least two pump stages, and vacuum pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15158724.3A EP3067560B1 (en) | 2015-03-12 | 2015-03-12 | Vacuum pump with at least one pump stage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3067560A1 true EP3067560A1 (en) | 2016-09-14 |
EP3067560B1 EP3067560B1 (en) | 2020-11-18 |
Family
ID=52633173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15158724.3A Active EP3067560B1 (en) | 2015-03-12 | 2015-03-12 | Vacuum pump with at least one pump stage |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3067560B1 (en) |
JP (1) | JP6188850B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111043007A (en) * | 2019-12-30 | 2020-04-21 | 东莞市天美新自动化设备有限公司 | Tracking stepping type multi-stage vacuum pumping system |
US20210102536A1 (en) * | 2019-10-07 | 2021-04-08 | Pfeiffer Vacuum Gmbh | Vacuum pump, scroll pump, and manufacturing method for such |
EP3647599B1 (en) * | 2019-10-07 | 2021-12-22 | Pfeiffer Vacuum Gmbh | Vacuum pump, scroll pump and method of manufacturing same |
DE102020128369A1 (en) | 2020-10-28 | 2022-04-28 | Leybold Gmbh | Process for operating a scroll pump and scroll pump |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3438460B1 (en) * | 2017-08-04 | 2024-03-20 | Pfeiffer Vacuum Gmbh | Vacuum pump |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5718565A (en) * | 1992-10-12 | 1998-02-17 | Leybold Aktiengesellschaft | Apparatus and process for operating a dry-compression vacuum pump |
US20010001950A1 (en) * | 1998-02-18 | 2001-05-31 | Takeshi Kawamura | Vacuum exhaust system |
JP2003139055A (en) * | 2001-10-31 | 2003-05-14 | Ulvac Japan Ltd | Evacuation device |
DE10225774C1 (en) * | 2002-06-10 | 2003-12-11 | Vacuubrand Gmbh & Co Kg | Vacuum pump, for condensing and aggressive gases, is a dry pump with a membrane pump stage and a spiral scroll pump stage |
JP2006322405A (en) * | 2005-05-19 | 2006-11-30 | Denso Corp | Evacuation system |
US20070071610A1 (en) * | 2003-11-20 | 2007-03-29 | Michael Holzemer | Method for controlling the drive motor of a positive displacement vaccum pump |
DE102006050943A1 (en) | 2006-10-28 | 2008-04-30 | Pfeiffer Vacuum Gmbh | Vacuum pump e.g. dry piston vacuum pump, has sensor located between pump stages, and evaluation unit connected with motor control to transmit evaluated signal so that control changes rotational speed of motor based on evaluated signal |
DE102008061897A1 (en) | 2008-12-11 | 2010-06-17 | Pfeiffer Vacuum Gmbh | Vacuum pump |
CA2752655A1 (en) * | 2011-09-13 | 2013-03-13 | Allan R. Nelson Engineering (1997) Inc. | Pump with wear sleeve |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05106578A (en) * | 1991-10-15 | 1993-04-27 | Ebara Corp | Warming-up control method for screw type dry vacuum pump |
JPH05231381A (en) * | 1992-02-26 | 1993-09-07 | Hitachi Ltd | Method and device for controlling vacuum exhaust capacity of dry vacuum pump and dry vacuum pump and semiconductor manufacturing vacuum processor |
US9341186B2 (en) | 2013-04-30 | 2016-05-17 | Agilent Technologies, Inc. | Scroll vacuum pump and method of maintenance including replacing a tip seal of a scroll vacuum pump |
-
2015
- 2015-03-12 EP EP15158724.3A patent/EP3067560B1/en active Active
-
2016
- 2016-03-02 JP JP2016039622A patent/JP6188850B2/en active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5718565A (en) * | 1992-10-12 | 1998-02-17 | Leybold Aktiengesellschaft | Apparatus and process for operating a dry-compression vacuum pump |
US20010001950A1 (en) * | 1998-02-18 | 2001-05-31 | Takeshi Kawamura | Vacuum exhaust system |
JP2003139055A (en) * | 2001-10-31 | 2003-05-14 | Ulvac Japan Ltd | Evacuation device |
DE10225774C1 (en) * | 2002-06-10 | 2003-12-11 | Vacuubrand Gmbh & Co Kg | Vacuum pump, for condensing and aggressive gases, is a dry pump with a membrane pump stage and a spiral scroll pump stage |
US20070071610A1 (en) * | 2003-11-20 | 2007-03-29 | Michael Holzemer | Method for controlling the drive motor of a positive displacement vaccum pump |
JP2006322405A (en) * | 2005-05-19 | 2006-11-30 | Denso Corp | Evacuation system |
DE102006050943A1 (en) | 2006-10-28 | 2008-04-30 | Pfeiffer Vacuum Gmbh | Vacuum pump e.g. dry piston vacuum pump, has sensor located between pump stages, and evaluation unit connected with motor control to transmit evaluated signal so that control changes rotational speed of motor based on evaluated signal |
DE102008061897A1 (en) | 2008-12-11 | 2010-06-17 | Pfeiffer Vacuum Gmbh | Vacuum pump |
CA2752655A1 (en) * | 2011-09-13 | 2013-03-13 | Allan R. Nelson Engineering (1997) Inc. | Pump with wear sleeve |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210102536A1 (en) * | 2019-10-07 | 2021-04-08 | Pfeiffer Vacuum Gmbh | Vacuum pump, scroll pump, and manufacturing method for such |
EP3647599B1 (en) * | 2019-10-07 | 2021-12-22 | Pfeiffer Vacuum Gmbh | Vacuum pump, scroll pump and method of manufacturing same |
US11773849B2 (en) | 2019-10-07 | 2023-10-03 | Pfeiffer Vacuum Gmbh | Vacuum pump, scroll pump, and manufacturing method for such |
CN111043007A (en) * | 2019-12-30 | 2020-04-21 | 东莞市天美新自动化设备有限公司 | Tracking stepping type multi-stage vacuum pumping system |
DE102020128369A1 (en) | 2020-10-28 | 2022-04-28 | Leybold Gmbh | Process for operating a scroll pump and scroll pump |
Also Published As
Publication number | Publication date |
---|---|
JP6188850B2 (en) | 2017-08-30 |
EP3067560B1 (en) | 2020-11-18 |
JP2016169731A (en) | 2016-09-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3067560B1 (en) | Vacuum pump with at least one pump stage | |
EP1598558B1 (en) | Oil sealed vane type rotary vacuum pump | |
DE69623516T2 (en) | Control system for two-stage vacuum pump | |
DE69425891T2 (en) | COMPRESSOR | |
EP2853744B1 (en) | Compressor with and method for flushing the compressor housing with flushing gas | |
DE602005000066T2 (en) | compressor | |
JP2010513779A (en) | Fluid machinery | |
CN1811189A (en) | Screw compressor acoustic resonance reduction | |
EP1918585B1 (en) | Vacuum pump | |
EP1948938B1 (en) | Pump with a cylindrical cooling bush | |
EP3508727A1 (en) | Scroll pump and method for operating a scroll pump | |
DE68912749T2 (en) | Spiral system regulation. | |
KR101842434B1 (en) | Water-Lubricated Type Single Screw Compressor | |
DE102005042451B4 (en) | Vacuum pump device | |
DE69109424T2 (en) | Turbo vacuum pump. | |
EP2196671A2 (en) | Piston vacuum pump | |
JP2006097619A (en) | Compressor | |
CN111094763B (en) | Actuator bearing arrangement | |
EP2196669A2 (en) | Assembly with vacuum pump and method for operating same | |
EP3580455A1 (en) | Oil-free vacuum pump having a prismatic piston and corresponding compressor | |
US9964109B2 (en) | Apparatus for driving fluid having a rotating cam and rocker arm | |
SE521443C2 (en) | Screw rotor machine with means for axially actuating at least one of the rotors | |
JP2015158144A (en) | rolling piston and rotary type fluid machine | |
US20180195614A1 (en) | Face Seal | |
JP7159153B2 (en) | Compressor mechanism with integrated motor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20170307 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20190404 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R079 Ref document number: 502015013831 Country of ref document: DE Free format text: PREVIOUS MAIN CLASS: F04B0037140000 Ipc: F04C0023000000 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F04C 18/02 20060101ALI20200526BHEP Ipc: F04C 29/00 20060101ALI20200526BHEP Ipc: F04C 28/08 20060101ALI20200526BHEP Ipc: F04B 49/20 20060101ALI20200526BHEP Ipc: F04C 25/02 20060101ALI20200526BHEP Ipc: F04B 37/14 20060101ALI20200526BHEP Ipc: F04C 23/00 20060101AFI20200526BHEP Ipc: F04B 39/04 20060101ALI20200526BHEP |
|
INTG | Intention to grant announced |
Effective date: 20200618 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502015013831 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 1336077 Country of ref document: AT Kind code of ref document: T Effective date: 20201215 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20201118 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210318 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210218 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210219 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210218 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210318 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R026 Ref document number: 502015013831 Country of ref document: DE |
|
PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 |
|
26 | Opposition filed |
Opponent name: EDWARDS LIMITED Effective date: 20210818 |
|
PLAX | Notice of opposition and request to file observation + time limit sent |
Free format text: ORIGINAL CODE: EPIDOSNOBS2 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20210331 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210312 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210331 Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210312 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210331 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210331 |
|
PLBB | Reply of patent proprietor to notice(s) of opposition received |
Free format text: ORIGINAL CODE: EPIDOSNOBS3 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 1336077 Country of ref document: AT Kind code of ref document: T Effective date: 20210312 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210318 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210331 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210312 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R100 Ref document number: 502015013831 Country of ref document: DE |
|
PLCK | Communication despatched that opposition was rejected |
Free format text: ORIGINAL CODE: EPIDOSNREJ1 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20150312 |
|
PLBN | Opposition rejected |
Free format text: ORIGINAL CODE: 0009273 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: OPPOSITION REJECTED |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 |
|
27O | Opposition rejected |
Effective date: 20230209 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20201118 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20240109 Year of fee payment: 10 Ref country code: CZ Payment date: 20240209 Year of fee payment: 10 Ref country code: GB Payment date: 20240222 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20240125 Year of fee payment: 10 |