Patent ID: 6701960
Filing Date: 2004-03-09
Classification: B01D,C02F,F04F,Y02A,Y10T

Abstract:
A double-cone device to create a pressure difference in a fluid flowing through the device, the device comprising:an entry unit having a substantially frustoconical shape, the entry unit including first and second ends having respective diameters, the diameter of the first end of the entry unit being smaller than the diameter of the second end of the entry unit; and an exit unit having a substantially frustoconical shape, the exit unit including first and second ends having respective diameters, the diameter of the first end of the exit unit being smaller than the diameter of the second end of the exit unit; the entry being coupled to the exit unit at the respective first ends to define an orifice and a longitudinal axis extending therethrough, the exit unit further including at least one inlet opening at a placement distance along the longitudinal axis from the first end of the exit unit such that a section of the exit unit between the first end of the exit unit and the inlet opening has an increasing diameter; whereby at least one of noise and wear of the double-cone device is decreased; wherein the orifice has a diameter, the inlet opening has a gap width, the entry unit has an entry diameter and an entry unit conicity, the exit unit has an exit diameter and an exit unit conicity, and a quality function of (1+sin (the entry unit conicity))2*sin2 (the exit unit conicity) is at least one of less than and equal to 0.1100, the double-cone device including at least one of the following double-cone characteristics: a) a ratio of the gap width to the diameter of the orifice is greater than 0 and less than 3, b) a ratio of the entry diameter of the entry unit to the diameter of the orifice is greater than 2, c) a ratio of the exit diameter of the exit unit to the diameter of the orifice is greater than 2, d) the entry unit conicity is greater than 0 degrees and less than 10 degrees, and e) the exit conicity is at least one of less than and equal to the entry unit conicity.