Pump for cryogenic liquids, particularly for use as fuel pump in tanks of vehicles operated with liquid hydrogen or natural gas, has drive, which is electro-dynamic linear motor, and pump is free oscillating piston pump

摘要

The pump has a drive, which is an electro-dynamic linear motor. The pump is a free oscillating piston pump. A coil (4) is integrated in a piston (1) of a permanent magnet (2) and in a cylinder housing (3). An axis of the coil runs parallel with the dipole axis of the permanent magnet. The units of the pump are completely or predominantly made from ceramic. The bush is made from aluminum oxide and the piston is made from boron nitride or graphite filled Teflon(RTM: Fluoropolymer). The bush consists of nickel chromium steel.