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
  • F04B37/06—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for evacuating by thermal means
  • F04B37/08—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for evacuating by thermal means by condensing or freezing, e.g. cryogenic pumps
• • 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
  • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
  • F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
  • F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
• • 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
  • F04B23/00—Pumping installations or systems
  • F04B23/02—Pumping installations or systems having reservoirs
  • F04B23/021—Pumping installations or systems having reservoirs the pump being immersed in the reservoir
• • 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
  • F04B39/06—Cooling; Heating; Prevention of freezing
  • F04B39/064—Cooling by a cooling jacket in the pump casing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
  • F04B53/08—Cooling; Heating; Preventing freezing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
  • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
  • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
  • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
  • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
• • 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
  • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
  • F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
  • F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
  • F04B2015/081—Liquefied gases
  • F04B2015/0822—Hydrogen
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
  • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
  • F17C2223/0146—Two-phase
  • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
  • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
  • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
  • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
  • F17C2227/01—Propulsion of the fluid
  • F17C2227/0128—Propulsion of the fluid with pumps or compressors
  • F17C2227/0135—Pumps

Definitions

• the invention relates to a cryogenic fluid pumping installation as well as a filling station comprising such an installation.
• the invention relates more particularly to a cryogenic fluid pumping installation comprising a sealed enclosure intended to contain a bath of cryogenic fluid, the enclosure housing a compression chamber communicating with the bath and a movable piston to ensure the compression of the fluid in the compression chamber, the piston being mounted at a first end of a rod, the apparatus comprising a mechanism for driving a second end of the rod back and forth in a longitudinal direction, the mechanism for drive comprising a motor provided with a rotating shaft and a mechanical transformation system converting the rotational movement of the rotating shaft into a translational movement, in the operating configuration of the installation, the longitudinal direction of movement of the rod of the piston being vertical, the motor being fixed rigidly to an upper frame.
• a classic solution for actuating a reciprocating piston pump uses a motor and a mechanical system for transforming the movement of the rotating shaft of the motor into translational movement (connecting rod/crank system and/or reduction gear and/or speed).
• cryogenic pumps operate with a horizontal piston pin. This is possible with a vacuum insulated cold end.
• the pump In hydrogen refueling stations, the pump must be available for pumping 24 hours a day. Therefore, it is best to place the cold end in a vacuum-insulated cryogenic liquid bath ("sump”) ("dewar”) to ensure that it stays cold. A vertical orientation of the piston is in this case more appropriate.
• a gimbal system can be used to transmit torque from the rotational output of the motor gearbox to the crank of the mechanical unit which converts the rotational motion provided by the motor into reciprocating translational motion of the rod of the plunger. This allows an optimal assembly without requiring very constraining tolerances.
• a roller screw linear actuator solution is also easy to implement due to its compactness. This solution is however not suitable for high pressure cryogenic applications due to low efficiency and reliability.
• An object of the present invention is to overcome all or part of the drawbacks of the prior art noted above.
• the installation according to the invention is essentially characterized in that the mechanical transformation system is rigidly connected to a motor via a tubular structure arranged around the rotating shaft, the tubular structure comprising a first end rigidly connected to the motor and/or to a casing surrounding the latter and a second end rigidly connected to the mechanical transformation system and/or to a casing surrounding the latter, said structure tubular being able and configured to absorb at least part of the torque and/or the forces generated in the transmission of movement between the motor and the enclosure.
• embodiments of the invention may include one or more of the following features:
• the invention also relates to a filling station for tanks or pressurized gas pipes comprising a source of liquefied gas, in particular a tank of liquefied hydrogen, a withdrawal circuit having a first end connected to the source and at least a second end intended to be connected to a reservoir to be filled, the withdrawal circuit comprising a pumping installation conforming to any one of the characteristics above or below.
• the invention may also relate to any alternative device or method comprising any combination of the characteristics above or below within the scope of the claims.
• FIG. 1 represents a perspective view, schematic and partial, illustrating a first possible embodiment of a pumping installation according to the invention
• FIG. 1 represents a perspective view, schematic and partial, illustrating a detail of the support structure of the pumping installation according to the invention
• FIG. 1 represents a schematic partial sectional view illustrating a detail of the installation and in particular an example of a compression chamber structure
• FIG. 1 represents a schematic and partial view, illustrating an example of a filling station using such a compression apparatus.
• the cryogenic fluid pumping installation 1 represented comprises a sealed enclosure 13 intended to contain a bath of cryogenic fluid.
• the enclosure 13 can be thermally insulated under vacuum and houses a compression chamber 3 communicating with the bath and a movable piston 5 to ensure the compression of the fluid in the compression chamber 3 cf. .
• the piston 5 is mounted at a first end of a piston rod 50.
• the device 1 comprises a mechanism 21 for driving a second end of the rod 50 in a back and forth movement in a longitudinal direction A of movement.
• the drive mechanism 21 comprises a motor 121 (with, where applicable, a gearbox or the like) provided with a rotating shaft 211 and a system 212 of mechanical transformation converting the rotational movement of the rotating shaft 211 into a movement of translation of the rod 50.
• the mechanical system 212 converting the rotational movement of the rotating shaft 211 into a translational movement of the rod 50 of the piston can be of the connecting rod and crank type and housed in a casing.
• the drive mechanism (motor 121 and transformation system 212) is arranged above enclosure 13.
• the rotating shaft 211 of the motor 121 is coupled to the mechanical transformation system 212 via an axis comprising a connection system such as a rigid connection or a universal joint for example.
• a universal joint coupling can allow greater assembly tolerances.
• the cardanic coupling between the two units also allows the “useful” torque to be transferred optimally with relatively easy maintenance.
• motor 121 and mechanical transformation system 212 can be housed in respective casings.
• the movement transformation system 212 (and its casing) can be easily removed to access the cold end placed vertically under the mechanism (under a crank, in particular in the case of a connecting rod and crank mechanism).
• the longitudinal direction A of movement of the rod 50 of the piston is vertical.
• the motor 121 is rigidly fixed to an upper frame 6 comprising for example a horizontal beam.
• the motor 121 can in particular be suspended from its upper frame 6.
• the upper frame of the engine 121 may comprise a first set of horizontal support beam(s) 6 connected to a supporting structure 60 comprising vertical feet resting on the ground.
• the mechanical transformation system 212 is rigidly connected to a motor 121 via a tubular structure 14 arranged around the rotating shaft 211.
• This tubular structure 14 comprises a first end rigidly connected to the motor 121 and/or to a casing surrounding the latter and a second end rigidly connected to the mechanical transformation system 212 and/or to a casing surrounding the latter.
• This tubular structure 14, for example cylindrical, is rigid and capable and configured to absorb at least part of the torque of forces generated in the transmission of movement between the motor 121 and the enclosure 13.
• the section of the tubular structure 14 can have shapes other than circular, for example square, rectangular, or other.
• the mechanical transformation system 212 can thus be suspended from the motor 121 via the tubular structure 14 .
• the sealed enclosure 13 can itself be suspended from the mechanical transformation system 212.
• an upper end of the container 13 can be suspended, and/or connected to a lower end of the mechanical transformation system 212 (in particular to its casing) by a connecting member 9 such as one or several axes and/or a sleeve.
• the lower end of the container 13 can thus be located above the ground without resting on a lower support.
• This tubular structure 14 has indeed a good resistance to torsion to take up the torque and/or the forces transmitted by the motor on either side of the axis 211.
• the tubular structure 14 may comprise an opening 15 for access to the rotating shaft 211, in particular to a universal joint in the case where the shaft 211 has a universal joint.
• the rotating shaft 211 can be coupled to the mechanical transformation system 212 via an axis comprising a connection system such as a rigid connection or a universal joint. This allows interventions without requiring complete dismantling.
• This opening 15 can if necessary be closed by a removable cover.
• the tubular structure 14 can be composed of several assembled parts, for example two half-shells assembled according to longitudinal junctions around the shaft 211.
• the installation 1 comprises a tank 17 of liquefied gas, in particular hydrogen.
• the tank 17 is fluidically connected to the enclosure 13 by a set of pipes 10, 11 and configured to supply the compression chamber 3 with the fluid to be compressed and to recover, if necessary, the vaporization gas generated in particular in the enclosure 13.
• This tank 17 can rest on the ground.
• the pipes 10, 11 can include flexible portions.
• cryogenic pipes connecting this container 13 and a tank 17 of cryogenic liquid can be flexible to absorb the thermal contractions and make it possible to tolerate minor misalignments.
• the structure of the installation has many advantages.
• the structure is particularly suitable for easy maintenance (via for example the dismantling of a suspended element, in particular a casing to access the mechanism(s) ( s)).
• the drive mechanism (motor + possibly reducer or gearbox) must not be disassembled during maintenance on the cold side of the cryogenic pumping part.
• the maintenance frequency of the motor part 121 is indeed generally lower than the cold drive part.
• the proposed structure allows access to the cold part 212 without dismantling the motor part 121 (visual inspection, cleaning, replacement of seals, lubrication, etc.).
• Installation 1 is compact with a low floor layout. This is suitable for its integration into a filling station.
• the motor 121 and the associated reducer can be standard elements, in particular with explosion-proof structure or reinforced safety.
• the motor 121 and the transformation system 212 can be placed relatively according to different configurations, in particular horizontally, vertically, with the shaft 211 rotating in this axis or perpendicularly depending on the model of reducer system 212 used (helical, helical bevel, screw without end, helical parallel shaft, right angle reducer).
• the motor assembly 211 and its possible illustrated reducer from which the rotating shaft 211 protrudes can, if necessary, be advantageously replaced by a torque motor (therefore without a reduction box or gearbox). In this case, no oil problem due to lubrication. In addition, in this case the assembly is more compact with reduced mass. In addition, such a motor assembly has more flexibility in adjusting the speed (speed profile and speed of rotation in particular).
• the compression of the fluid in the compression chamber can be obtained by traction or compression of the rod 50.
• the invention also applies to pumps with two compression stages (for example two compression chambers and two compression stages respectively in the two directions of translation of the piston).
• The represents an example of a filling station for tanks or pressurized gas pipes comprising a source 17 of liquefied gas, in particular of liquefied hydrogen, a withdrawal circuit 18 having a first end connected to the source and at least one second end intended to be connected to a reservoir 190 to be filled.
• the withdrawal circuit 18 comprising a compression apparatus 1 conforming to the installation according to any one of the above characteristics.
• the enclosure 13 is suspended from the mechanical transformation system 212, it is possible to envisage providing one or more feet connecting the enclosure to the ground, if necessary via a flexible and/or adjustable connection. This can be during a maintenance operation and/or in a normal operating situation, for example to maintain the enclosure 13 even better and to absorb any vibrations, for example. Similarly, the lower end of the enclosure could rest on a support, for example in a housing which provides lateral support.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Filling Or Discharging Of Gas Storage Vessels (AREA)
• Reciprocating Pumps (AREA)
• Compressor (AREA)
• Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
• Transmission Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=77519243

Family Applications (1)

Country Status (8)

Families Citing this family (2)

Family Cites Families (6)

• 2021
  • 2021-06-14 FR FR2106232A patent/FR3123952B1/fr active Active
• 2022
  • 2022-05-18 US US18/569,900 patent/US20240280094A1/en active Pending
  • 2022-05-18 JP JP2023571254A patent/JP2024523981A/ja active Pending
  • 2022-05-18 WO PCT/EP2022/063378 patent/WO2022263085A1/fr not_active Ceased
  • 2022-05-18 KR KR1020247000624A patent/KR20240019276A/ko active Pending
  • 2022-05-18 EP EP22729579.7A patent/EP4356000A1/fr active Pending
  • 2022-05-18 CN CN202280034328.8A patent/CN117321306A/zh not_active Withdrawn
  • 2022-05-18 CA CA3220400A patent/CA3220400A1/fr active Pending

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