Screw spindle pump

A screw spindle pump, comprising:

• a spindle housing with a spindle pack which is received therein and comprises a drive spindle and at least one running spindle meshing with the latter, by way of which spindle pack a fluid to be conveyed is able to be conveyed from a suction side at which the fluid is at a suction pressure, to a pressure side at which the fluid is at an increased outlet pressure;
• and comprising a thrust compensation device comprising an aperture which is assigned to the at least one running spindle, is disposed on the suction side on the housing and has a bore which opens out adjacent to an end face of the running spindle, wherein the aperture by way of a fluid channel is able to be supplied a fluid which, in comparison to the suction pressure, is under an increased pressure and by way of the bore presses against the end face of the running spindle and builds up a supporting pressure, wherein the fluid channel by way of a mouth communicates with the interior of the spindle housing at the pressure side and runs through the spindle housing to the aperture, wherein disposed upstream of the mouth is a particle separator by way of which at least particles of the same or a larger size than the diameter of the bore of the aperture are separated.