SSC HIGH HEAD LIQUID HELIUM PUMP

THIS PROPOSAL DESCRIBES A LIQUID HELIUM PUMP DESIGNED TO MEET REQUIREMENTS FOR LIQUID HELIUM CIRCULATION THROUGH SUPERCONDUCTING SUPER COLLIDER MAGNET STRINGS. THE PUMP IS A FOUR-CHAMBER POSITIVE DISPLACEMENT NUTATING MACHINE WITH LOW NPSH. IT IS CAPABLE OF PRODUCING HIGH HEADS WITH LITTLE IMPACT ON EFFICIENCY FOR TURN DOWN RATIOS AS HIGH AS 5 TO 1. THE FOUR-CHAMBER DESIGN PROVIDES OUTLET FLOW WITH ONLY LOW AMPLITUDE PULSATIONS. THIS SUBMERGED NUTATINGPUMP HAS FEWER PARTS THAN AN EQUIVALENT PISTON PUMP AND IS DRIVEN FROM A SINGLE LOW HEAT LEAK ROTARY SHAFT FROM A WARM MOTOR. BY DRAWING FROM CURRENT EXPERIENCE ON A SIMILAR NUTATING CRYOGENIC EXPANDER, CRYOGENIC TECHNICAL SERVICES, INC. (CTS) PROPOSES TO BUILD A 1/5 SCALE MODEL PUMP IN PHASE I AND TEST IT IN A SIMPLE LIQUID NITROGEN LOOP. OUR AIM IS TO VERIFY BOTH CONCEPT AND BASIC HARDWARE DESIGN IN PHASEI SO THAT PHASE II WORK CAN CONCENTRATE ON DEVELOPMENT OF A FULL SIZE PROTOTYPE PUMP.