Installation for pumping cryogenic fluid and filling station comprising such an installation

An installation for pumping cryogenic fluid comprising a fluid tight enclosure configured to contain a bath of cryogenic fluid, the enclosure housing a compression chamber communicating with the bath and a piston configured to move in order to compress the fluid in the compression chamber, the piston being mounted at a first end of a rod, the installation comprising:

• a drive mechanism driving a second end of the rod in a back and forth movement in a longitudinal direction of travel, the drive mechanism comprising a motor equipped with a rotary shaft and a mechanical conversion system converting the rotational movement of the rotary shaft into the back and forth movement,
• during operation of the installation, the longitudinal direction of travel of the piston rod being vertical, the motor being fixed rigidly to a motor upper mounting structure,
• wherein the mechanical conversion system is also fixed rigidly to a mechanical conversion system upper mounting structure which comprises the motor upper mounting structure or a separate mounting structure rigidly connected to the motor upper mounting structure,
• wherein the motor upper mounting structure comprises a first support beam assembly, the mechanical conversion system upper mounting structure comprising a second support beam assembly, the second support beam assembly being rigidly connected to the first support beam assembly,
• wherein the motor is rigidly fixed to the first support beam assembly and the mechanical conversion system is rigidly fixed to the second support beam assembly which are integral with or rigidly connected to a common beam extending in a second direction transverse to the longitudinal direction of travel.