WO2021228793A1 - Pompe à vide sèche - Google Patents
Pompe à vide sèche Download PDFInfo
- Publication number
- WO2021228793A1 WO2021228793A1 PCT/EP2021/062383 EP2021062383W WO2021228793A1 WO 2021228793 A1 WO2021228793 A1 WO 2021228793A1 EP 2021062383 W EP2021062383 W EP 2021062383W WO 2021228793 A1 WO2021228793 A1 WO 2021228793A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vacuum pump
- rotor
- shaft
- belt
- pump according
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
-
- 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
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/126—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
-
- 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
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
-
- 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
- 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
- F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
-
- 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
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/082—Details specially related to intermeshing engagement type pumps
- F04C18/084—Toothed wheels
-
- 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
- F04C2220/00—Application
- F04C2220/30—Use in a chemical vapor deposition [CVD] process or in a similar process
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/20—Rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
Definitions
- the present invention relates to a dry vacuum pump, such as a dry compression vacuum pump that is used for example in so-called clean or clean rooms. More specifically, the present invention relates to a dry vacuum pump comprising a belt drive. Even more specifically, the present invention relates to a dry vacuum pump, for example of the positive displacement type, in particular in the form of a Roots pump, which comprises a drive device which guarantees an optimal synchronization of the rotation of the cylinders. rotors without however requiring the use of lubricating liquid.
- Roots pumps Dry vacuum pumps such as Roots pumps are well known in the prior art. Such pumps generally include two rotor elements arranged in a pumping chamber which in Roots pumps are designed as lobe-shaped rotor elements. Each rotor element is supported by a rotor shaft which is rotated by a drive device.
- the drive device consists of two toothed wheels each mounted on one of the rotor shafts and which mesh with each other. Only one of the two shafts is rotated by a motor, for example an electric motor, driving the second rotor shaft via the toothed wheels.
- a motor for example an electric motor
- the drive devices comprising toothed wheels which transmit the drive torque from one rotor shaft to the other rotor shaft have the advantage that the use of such wheels allows automatic synchronization of the rotation of the two rotor shafts.
- the toothed wheels act as “landing gear” which makes it possible to prevent damage to the rotor elements.
- EP1054160A1 Another approach for synchronizing the rotor shafts of a vacuum pump is presented in European patent application EP1054160A1.
- EP1054160A1 relates to a dry screw pump whose rotor shafts are each driven by their own electric motor, the angular positions of the shafts being determined by resolvers. On the basis of the signals from the resolvers the motors of the rotor shafts are synchronized electronically.
- this approach allows efficient synchronization of the rotor shafts, it requires the use of two separate motors and an electronic system which is not favorable in a large number of applications.
- the objective of the present invention is therefore to provide a dry vacuum pump having a drive device which does not require lubrication while ensuring sufficient synchronization of the rotor shafts so that this device can be used in dry vacuum pumps.
- the main object of the present invention is to provide a dry vacuum pump having a more efficient rotor drive mechanism than that of the pumps of the prior art.
- a dry vacuum pump comprising:
- a drive device comprising a drive shaft at one end of which is fixed at least one drive wheel intended to set at least one belt in motion; - at least two parallel rotors each comprising a rotor shaft provided with a rotor element, this rotor shaft being able to be driven in rotation by the belt and being provided at one of its axial ends with a toothed wheel, this pump differing in that: the drive wheel and the belt are smooth; each rotor shaft comprises at least one smooth section arranged to cooperate with the belt and the toothed wheels of the rotor shafts are dimensioned and arranged to mesh with one another.
- the belt drive and the automatic synchronization of the rotors thanks to the toothed wheels make it possible to provide a minimum clearance between the rotor elements which guarantees maximum efficiency of the pump, in particular its compression ratio, without having to modify the rotors, the elements. pump rotors and / or stator.
- the drive device of the present invention can be integrated into existing pumps without modifications to the rotor and stator elements without loss of efficiency.
- the toothed wheels of the rotor shafts allow automatic synchronization of the rotations of the rotor shafts.
- the toothed wheels make it possible to automatically resynchronize the rotor shafts.
- the toothed wheels are subjected to a load only when resynchronization is necessary, it is not necessary to provide lubrication for these wheels.
- the toothed wheels although meshed with each other, are not subjected to a load, which prevents wear of the toothed wheels.
- the torque in rotation is transmitted by the belt and not by the toothed wheels, unlike the pumps known from the prior art.
- the gear formed by the toothed wheels of the rotor shafts allows, for example in the event of the belt breaking, these two shafts remain integral in rotation.
- the toothed wheels therefore act as “landing gear”, or safety gear.
- the toothed wheels allow the pump to speed down to a standstill without the rotors touching each other and without causing damage.
- a pump according to the present invention With a pump according to the present invention, it is therefore possible to eliminate the need for lubrication while ensuring optimum synchronization of the rotor shafts. Finally, a pump according to the present invention makes it possible to prevent damage to the rotor elements even in the event of a sudden stop of the pump drive, for example in the event of a belt breakage or a power cut. It is important to note that a pump according to the present invention can include any type of motor for driving the star wheel. This motor can for example be electric or thermal.
- the toothed wheels are arranged so that the teeth of the respective toothed wheels are subjected to a load only when the rotor shafts are rotated asynchronously. This ensures minimal wear of the toothed wheels and therefore a longer service life of the drive device.
- the angular play of the toothed wheels is less than that of the rotor elements.
- each rotor shaft is located at one end of this shaft. This makes it possible to easily separate a compression zone in which the fluid to be evacuated is effectively transported and compressed by the rotor elements supported by the rotor shafts and a drive zone comprising the device for driving the rotor shafts and in particular the smooth section of each rotor shaft as well as the belt. This is to prevent the compression zone from being contaminated through the training zone.
- the smooth section has a diameter smaller than that of the toothed wheel.
- the two toothed wheels have the same diameter and the two smooth sections have the same diameter. This makes it possible to facilitate the synchronization of the rotation of the rotor shafts. Indeed, by providing identical diameters, it is easier to guarantee that the rotor shafts rotate at the same speed.
- the belt partially surrounds one of the smooth sections and is pressed down by the other. This allows the two rotor shafts to be easily rotated in the opposite direction.
- dry vacuum pumps known from the prior art, such as, for example, screw pumps, Roots pumps, or pin pumps, normally employ rotor shafts intended to be driven in reverse rotation with respect to one another.
- the device for driving a pump according to the present invention can be adapted to drive pumps known from the prior art.
- the toothed wheel and the smooth section of a rotor shaft are located at the same axial end of this shaft. This makes it possible to provide a simple geometry of the belt, which avoids energy losses and the risk of the latter breaking.
- each smooth section is located on the circumferential surface of a discoid part. This makes it possible in particular to increase the contact surface between the belt and rotor shaft and thus optimize the drive of the rotor shafts by the belt. In addition, the risk of the belt slipping relative to the smooth section is reduced, which makes it possible to reduce the risk of desynchronization of the rotor shafts.
- the discoid parts and the drive wheel are substantially in the same plane. This makes it possible to provide a belt which is itself in a single plane, which reduces the risk of the belt breaking.
- the points resulting from the projection of the axes of rotation of the rotor shafts and the driveshaft are aligned on a plane perpendicular to them.
- the belt pressure on the smooth sections of the rotor shafts is equal, which ensures optimum drive synchronization.
- the distance between the drive shaft and the rotor shaft closest to it is adjustable. This allows the tension of the drive belt to be adjusted and the drive of the rotor shafts to be optimized. By adjusting the belt tension, it is possible to minimize the risk of the rotor shafts becoming out of sync and thus preventing the toothed wheels from having to come into contact in order to reestablish synchronization.
- the dry vacuum pump is a dry vacuum pump where the rotor elements are lobe-shaped and are nested within each other.
- the vacuum pump is a roots pump, a screw pump or a lug pump.
- the vacuum pump is single-stage or multi-stage.
- the drive device comprises a drive shaft at one end of which is fixed at least one drive wheel intended to set two belts in motion.
- a dry vacuum pump here a dry Roots pump, according to a first preferred embodiment of the present invention, in perspective top view;
- FIG. 5 a dry vacuum pump, here a dry Roots pump, according to a second preferred embodiment of the present invention, in top view and in perspective;
- FIG. 8 a front view of the vacuum pump in cross section along the plane A-A of Figure 7.
- the dry vacuum pump according to the present invention is an assembly comprising a drive device 1 comprising a motor 2, generally electric, rotating a drive shaft 3 at the front end of which is fixed at least one wheel.
- drive 4 designed to set at least one belt 5 in motion.
- the dry vacuum pump is an assembly comprising a drive device 1 comprising a motor 2, generally electric, rotating a drive shaft 3 at the front end of which is fixed a drive wheel 4 intended to set a belt 5 in motion.
- each rotor 7, 8 comprises a shaft.
- rotor 9, 10 provided with a rotor element, here in the form of a lobe 11, 12, and intended to be driven in rotation by the belt 5.
- Each rotor shaft 9, 10 is provided at one of its ends axial of a toothed wheel 13, 14, preferably on the front side.
- the axes of rotation of the rotor shafts 9, 10 of the two rotors 7, 8 are parallel to each other and generally also parallel to the axis of rotation of the drive shaft 3.
- the lobes 11, 12 are generally identical and the distance between the axes of rotation of the rotor shafts 9, 10 of the rotors 7, 8 is chosen so that these lobes 11, 12 can interact so as to be able to create a positive displacement and a compression. fluid to be evacuated as is well known to a person skilled in the art. Because the rotors 7, 8 are designed to rotate in the opposite direction, their lobes 11, 12 are rotated with respect to each other by an angle of 90 ° (cf. FIG. 3). An inlet port (not shown) for a fluid such as air is provided at the rear of the housing and an outlet port (not shown) for this fluid is provided at the front. Thus, the rotation of the lobes 11, 12 causes the circulation and the compression of the fluid. According to the invention, the belt 5 is smooth, just like the drive wheel 4, this means that this drive wheel 4 has a smooth axial circumferential surface 15.
- the smooth drive wheel 4 is intended to cooperate with the belt 5 which adheres to it and can, thanks to this, be set in motion by the rotation of the shaft 3 of the motor 2.
- the belt 5 also being provided to act on the rotor shafts 9,10 of the rotors 7, 8 by making them turn, these rotor shafts 9, 10 have sections whose axial circumferential surfaces are smooth to receive the belt 5 and make it adhere. . These smooth sections 16, 17 are therefore located at the front end of the shafts 9, 10 of the rotors 7, 8.
- the belt 5 forms a loop going from the drive wheel 4 to the first rotor shaft, that is to say the rotor shaft 9 furthest from the wheel d. 'drive 4.
- the belt 5 therefore rests on the smooth axial circumferential surface 15 of the drive wheel 4 and the smooth section 16 of the rotor shaft 9 and it is stretched between this rotor shaft 9 and this drive wheel 4. .
- the belt 5 in order to be able to also drive the second rotor shaft 10 located between the first rotor shaft 9 and the drive wheel 4, the belt 5 must come into contact with the smooth section 17 of this second rotor shaft 10 and adhere to it. this. This is obtained by deforming the path of the belt 5 which would be trapezoidal if there were only one shaft. Thus, the path of the belt 5 is bent by forcing it to pass under the smooth section 17 of the second rotor shaft 10. The belt 5 therefore partially surrounds the wheel 4 of the drive device 1 and the smooth section 16 of the first rotor shaft 9 and is pressed downwards by the smooth section 17 of the second rotor shaft 10.
- the points resulting from the projection of the axes of rotation of the rotor shafts 9, 10 of the rotors 7, 8 and of the drive shaft 3 are aligned on a plane which is perpendicular to them, as shown by the line L drawn. in figure 4.
- the length of the belt 5 and / or the distance between the drive device 1 and the housing are / is therefore chosen such that the belt 5 remains sufficiently tensioned to be able to fulfill its role of driving the rotation of the machine.
- the distance between the drive device 1 (or the drive shaft 3) and the casing (or the second rotor shaft 10 of the rotor 8) can be adjustable, which makes it possible to use belts variable length and optimally adjust the belt tension 5.
- the rotor shafts 9, 10 of the rotors 7, 8 preferably each comprise a discoid part 19, 20 increasing their diameter and whose axial circumferential surface is smooth and then constitutes the smooth section 16, 17 of the shaft considered as rotor 9, 10.
- the discoid parts are pulleys.
- the discoid parts 19, 20 and the drive wheel 4 are substantially in the same plane, so as to be able to cooperate effectively with the belt 5.
- Their axial thicknesses are generally at least equal to that of the belt 5.
- the toothed wheels 13, 14 carried by the rotor shafts 9, 10, preferably at the front ends thereof, are dimensioned to mesh with one another and located in the same plane.
- the sum of the radii of these toothed wheels 13, 14 is therefore substantially equal to the distance between the two axes of rotation of the rotor shafts 9, 10 of the rotors 7, 8, taking into account the dimensions of the teeth.
- the toothed wheels 13, 14 are dimensioned such that the teeth of these wheels are subjected to a load only when the rotation of the rotor shafts 9, 10 is asynchronous. The rest of the time the toothed wheels 13, 14 mesh well with one another but their teeth are not subjected to any load.
- the gear formed by the toothed wheels 13, 14 does not have the function of transmitting a torque from one rotor shaft to the other, unlike the pumps known from the prior art.
- the toothed wheels 13, 14 only have a function of automatically synchronizing the rotation of the rotor shafts 9, 10.
- the toothed wheels 13, 14 therefore do not need to be lubricated and the entire pump drive device can be lubricated. do without lubricating liquid.
- the smooth sections 16, 17 of the rotor shafts 9, 10 of the rotors 7, 8 have diameters smaller than those of the toothed wheels 13, 14 carried by these shafts 9, 10.
- the dry vacuum pump shown in the form of a dry Roots pump in FIG. 5, is an assembly comprising a drive device 1 comprising a motor 2, generally electric. , rotating a drive shaft 3 at the front end of which is fixed at least one drive wheel 4 provided to set in motion two belts 5a, 5b.
- the two belts 5a, 5b are smooth, just like the drive wheel 4, which means that this drive wheel 4 has a smooth axial circumferential surface 15.
- the smooth drive wheel 4 is intended to cooperate with the two belts 5a, 5b which adhere to it in parallel and can, thanks to this, be set in motion by the rotation of the shaft 3 of the motor 2.
- the smooth drive wheel 4 comprises a release groove delimiting two smooth zones intended to receive and retain each of the two belts 5a, 5b axially.
- the drive device 1 comprises a drive shaft 3 at the front end of which is fixed two drive wheels 4 provided to set the two belts 5a, 5b in motion.
- the two belts 5a, 5b also being provided to act on the rotor shafts 9,10 of the rotors 7, 8 by rotating them, these rotor shafts 9, 10 have sections whose axial circumferential surfaces are smooth to receive the two belts 5a , 5b in parallel and make them adhere.
- These smooth sections 16, 17 are therefore located at the front end of the shafts 9, 10 of the rotors 7, 8, and include a clearance groove delimiting two smooth sections for each rotor shaft 9, 10 intended to receive and retain each of the two. axially 5a, 5b belts.
- the two belts 5a, 5b each form in parallel a loop going from the drive wheel 4 to the first rotor shaft, that is to say the rotor shaft 9 the more remote from the drive wheel 4.
- the two belts 5a, 5b therefore each rest in parallel on the smooth axial circumferential surface 15 of the drive wheel 4 and the smooth sections 16 of the rotor shaft 9 and they are tensioned between this rotor shaft 9 and this drive wheel 4.
- the two belts 5a, 5b must come into contact with the smooth sections 17 of this second rotor shaft 10 and adhere in parallel to the latter.
- the belts 5a, 5b therefore partially surround the wheel 4 of the drive device 1 and the smooth sections 16 of the first rotor shaft 9 and they are pressed downwards by the smooth sections 17 of the second rotor shaft 10 (cf. FIG. 6). .
- the rotor shafts 9, 10 of the rotors 7, 8 preferably each comprise a discoid part 19, 20 increasing their diameter, the axial circumferential surface of which is smooth and comprises a release groove delimiting two smooth zones. intended to receive and retain each of the two belts 5a, 5b axially.
- the discoid parts 19, 20 then constitute the smooth sections 16, 17 of the rotor shaft 9,
- the rotor shafts 9, 10 of the rotors 7, 8 each comprise two discoid parts 19, 20.
- the discoid parts 19, 20 and the drive wheel 4 are substantially in the same plane, so as to be able to cooperate effectively with the two belts 5a, 5b. Their axial thicknesses are generally at least equal to that of two belts 5a, 5b (cf. FIG. 7).
- the discoid parts 19, 20 include bearings 21a, 21b, such as sealed bearings, ball bearings, or deep groove ball bearings.
- the risk of a belt slipping is a function of the torque and the grip angle of the belt on the discoid parts.
- each of the two belts 5a, 5b runs a risk of slipping independently, making it possible to further reduce the work of resynchronization of the toothed wheels. Compensation for the risk of slipping using two belts 5a, 5b thus makes it possible to reduce and limit the risk of desynchronization of the toothed wheels and their wear.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Drying Of Solid Materials (AREA)
- Non-Positive Displacement Air Blowers (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202180032564.1A CN115485477A (zh) | 2020-05-11 | 2021-05-10 | 干式真空泵 |
AU2021269773A AU2021269773A1 (en) | 2020-05-11 | 2021-05-10 | Dry vacuum pump |
JP2022562441A JP2023525957A (ja) | 2020-05-11 | 2021-05-10 | ドライ真空ポンプ |
KR1020227038317A KR20230005858A (ko) | 2020-05-11 | 2021-05-10 | 건식 진공 펌프 |
EP21725142.0A EP4150214A1 (fr) | 2020-05-11 | 2021-05-10 | Pompe à vide sèche |
BR112022019444A BR112022019444A2 (pt) | 2020-05-11 | 2021-05-10 | Bomba de vácuo a seco |
US17/914,533 US20230143219A1 (en) | 2020-05-11 | 2021-05-10 | Dry vacuum pump |
CA3173403A CA3173403A1 (fr) | 2020-05-11 | 2021-05-10 | Pompe a vide seche |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2020/063009 WO2021228355A1 (fr) | 2020-05-11 | 2020-05-11 | Pompe à vide sèche |
EPPCT/EP2020/063009 | 2020-05-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021228793A1 true WO2021228793A1 (fr) | 2021-11-18 |
Family
ID=70779685
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2020/063009 WO2021228355A1 (fr) | 2020-05-11 | 2020-05-11 | Pompe à vide sèche |
PCT/EP2021/062383 WO2021228793A1 (fr) | 2020-05-11 | 2021-05-10 | Pompe à vide sèche |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2020/063009 WO2021228355A1 (fr) | 2020-05-11 | 2020-05-11 | Pompe à vide sèche |
Country Status (10)
Country | Link |
---|---|
US (1) | US20230143219A1 (fr) |
EP (1) | EP4150214A1 (fr) |
JP (1) | JP2023525957A (fr) |
KR (1) | KR20230005858A (fr) |
CN (1) | CN115485477A (fr) |
AU (1) | AU2021269773A1 (fr) |
BR (1) | BR112022019444A2 (fr) |
CA (1) | CA3173403A1 (fr) |
TW (1) | TW202204770A (fr) |
WO (2) | WO2021228355A1 (fr) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3706588C1 (en) * | 1987-02-26 | 1988-08-18 | Mannesmann Ag | Drive device for rotary displacement compressors |
JPH05231366A (ja) * | 1991-07-09 | 1993-09-07 | Ebara Corp | 多段式真空ポンプ装置 |
EP1054160A1 (fr) | 1999-05-18 | 2000-11-22 | Sterling Fluid Systems (Germany) GmbH | Machine à déplacement positif pour des fluides compressibles |
US20060120890A1 (en) * | 2004-11-30 | 2006-06-08 | David Moorhouse | Drive system for fluid flow device |
WO2018224409A1 (fr) | 2017-06-09 | 2018-12-13 | Leybold Gmbh | Pompe à vide à compression sèche |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2527725B1 (fr) * | 1982-05-26 | 1987-03-27 | Bernard Moteurs | Dispositif d'entrainement synchronise de deux organes rotatifs, notamment des rotors d'un compresseur roots |
DE10334481A1 (de) * | 2003-07-29 | 2005-03-17 | Steffens, Ralf, Dr. | Antrieb einer Spindelvakuumpumpe |
DE102006001733A1 (de) * | 2006-01-13 | 2007-07-19 | Oerlikon Leybold Vacuum Gmbh | Vakuumpumpe |
DE102010014218B4 (de) * | 2010-04-08 | 2018-09-13 | Netzsch Pumpen & Systeme Gmbh | Drehkolbenpumpe und Verfahren zum Betreiben einer Drehkolbenpumpe |
DE202012008133U1 (de) * | 2012-08-25 | 2013-11-27 | Oerlikon Leybold Vacuum Gmbh | Vakuumpumpe |
CN103895703A (zh) * | 2014-04-02 | 2014-07-02 | 广东亿纬赛恩斯新能源系统有限公司 | 转向与制动复合装置及其对车辆转向与制动的控制方法 |
-
2020
- 2020-05-11 WO PCT/EP2020/063009 patent/WO2021228355A1/fr active Application Filing
-
2021
- 2021-05-10 CA CA3173403A patent/CA3173403A1/fr active Pending
- 2021-05-10 US US17/914,533 patent/US20230143219A1/en active Pending
- 2021-05-10 CN CN202180032564.1A patent/CN115485477A/zh active Pending
- 2021-05-10 KR KR1020227038317A patent/KR20230005858A/ko active Search and Examination
- 2021-05-10 WO PCT/EP2021/062383 patent/WO2021228793A1/fr unknown
- 2021-05-10 EP EP21725142.0A patent/EP4150214A1/fr active Pending
- 2021-05-10 JP JP2022562441A patent/JP2023525957A/ja active Pending
- 2021-05-10 AU AU2021269773A patent/AU2021269773A1/en active Pending
- 2021-05-10 BR BR112022019444A patent/BR112022019444A2/pt unknown
- 2021-05-11 TW TW110116932A patent/TW202204770A/zh unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3706588C1 (en) * | 1987-02-26 | 1988-08-18 | Mannesmann Ag | Drive device for rotary displacement compressors |
JPH05231366A (ja) * | 1991-07-09 | 1993-09-07 | Ebara Corp | 多段式真空ポンプ装置 |
EP1054160A1 (fr) | 1999-05-18 | 2000-11-22 | Sterling Fluid Systems (Germany) GmbH | Machine à déplacement positif pour des fluides compressibles |
US20060120890A1 (en) * | 2004-11-30 | 2006-06-08 | David Moorhouse | Drive system for fluid flow device |
WO2018224409A1 (fr) | 2017-06-09 | 2018-12-13 | Leybold Gmbh | Pompe à vide à compression sèche |
Also Published As
Publication number | Publication date |
---|---|
CA3173403A1 (fr) | 2021-11-18 |
BR112022019444A2 (pt) | 2022-12-13 |
KR20230005858A (ko) | 2023-01-10 |
AU2021269773A1 (en) | 2022-10-20 |
CN115485477A (zh) | 2022-12-16 |
US20230143219A1 (en) | 2023-05-11 |
EP4150214A1 (fr) | 2023-03-22 |
TW202204770A (zh) | 2022-02-01 |
JP2023525957A (ja) | 2023-06-20 |
WO2021228355A1 (fr) | 2021-11-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3102795B1 (fr) | Turbomachine équipée d'un groupe de lubrification | |
FR2823538A1 (fr) | Compresseurs a volutes | |
FR2708068A1 (fr) | Transmission à friction continûment variable. | |
EP1208317A1 (fr) | Ensemble d'entrainement pour vehicule avec transmission variable en continu | |
WO2021228793A1 (fr) | Pompe à vide sèche | |
WO2010070211A1 (fr) | Dispositif de mise sous pression d'un fluide destine a etre directement sur une prise de mouvement | |
FR2541405A1 (fr) | Transmission a roue conique plate en nutation | |
FR3011291A1 (fr) | Turbomachine a accouplement torsible integre a au moins un arbre menant et/ou mene | |
EP3794243B1 (fr) | Dispositif de transmission de couple a frottements reduits | |
EP3565983B1 (fr) | Rouleau synchronise a roues libres | |
FR2771153A1 (fr) | Reducteur epicycloidal ou cycloidal et articulation de robot equipee d'un tel reducteur | |
WO2010066988A2 (fr) | Pompe a vide de type seche et procede de montage associe | |
WO2016055745A1 (fr) | Turbomachine tournant a des vitesses elevees | |
EP2019937B1 (fr) | Dispositif de reduction du type a trains epicycloïdaux imbriques | |
EP3060420B1 (fr) | Systeme de transmission pour moteur de combustion interne avec alterno-demarreur | |
EP3329154B1 (fr) | Dispositif de limitation de pression notamment pour un système d'assistance de véhicule | |
EP3721105B1 (fr) | Roulement a rouleaux en chevrons | |
EP2631490B1 (fr) | Roue à aubes radiale avec couronne de base radialement libre | |
EP2341266B1 (fr) | Poulie d'entraînement d'un accessoire d'un véhicule automobile, notamment d'un alterno-démarreur | |
EP0077859B1 (fr) | Accouplement à friction, notamment pour machines de récolte | |
WO2024088630A1 (fr) | Groupe de pompage | |
FR2894007A1 (fr) | Procede de montage d'un organe d'entrainement, sur l'arbre, notamment d'une machine electrique tournante de vehicule automobile, et dispositif de montage pour la mise en oeuvre de ce procede | |
FR3117176A1 (fr) | Pompe à vide | |
FR3103019A1 (fr) | Elément d’engrenage à rouleaux | |
FR2979397A1 (fr) | Systeme d'entrainement de pompe a eau |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21725142 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 3173403 Country of ref document: CA |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112022019444 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 2022562441 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2021269773 Country of ref document: AU Date of ref document: 20210510 Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 112022019444 Country of ref document: BR Kind code of ref document: A2 Effective date: 20220927 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2021725142 Country of ref document: EP Effective date: 20221212 |