Variable pressure pitot pump with reduced heating of pumped fluid

摘要

A variable pressure and variable flow rate pump in accordance with the invention includes a stationary pump housing (1), a rotating pump housing (10), rotatably mounted with respect to the stationary pump housing including a fluid receiving chamber (12) for receiving fluid to be pumped which is driven by a drive (11); a pitot probe (5) rotatably mounted in the stationary pump housing having a tip (5a) disposed in the fluid receiving chamber radially offset from an axis of rotation of the probe for receiving fluid from the fluid receiving chamber; a brake (15) for selectively braking a rotational speed of the probe to control the rotational speed of the probe independently of a rotational speed of the rotating pump housing to provide a fluid output from the output with a variable pressure and flow rate; a thermal insulator (44) mounted between the brake and the fluid receiving chamber for thermally insulating the fluid receiving chamber from heat generated by the brake; and a control (C) coupled to the brake for controlling activation of the brake to control a rate of rotation of the probe to control the pressure and flow rate of the fluid produced at the output.