Agitating – Stirrer within stationary mixing chamber – Rotatable stirrer
Patent
1998-03-03
1999-09-14
Cooley, Charles E.
Agitating
Stirrer within stationary mixing chamber
Rotatable stirrer
3663303, 416223R, 416228, 416235, 416DIG2, 416DIG5, B01F 722
Patent
active
059511621
ABSTRACT:
A mixing process may be carried out in a tank of a certain diameter. The process may also be constrained to the use of an impeller of certain diameter in order to obtain the flow pattern desired to carry out the process. The power consumption of the system which may be expressed in terms of flow per unit (Q/P) is optimized for the impeller diameter to tank diameter (D/T) constraint by utilizing an axial flow blade, preferably having camber and a tip chord angle at the tip and an angle near the attachment to the shaft (the hub) which rotates the impeller, where the tip chord angle and the twist the difference between the blade angle (between the chord and a plane perpendicular to the axis of rotation of the shaft between the tip and hub) are varied in opposite senses; for example, increasing the tip chord angle to provide a more D/T for a more optimum Q/P to which the process is constrained and then reducing the twist to maintain the power efficiency at the higher tip chord angle. The freedom to increase the tip chord angle and reduce the twist provides flexibility enabling the use of a limited number, say three, of hubs, thereby reducing the cost of the impeller system. The efficiency of the impeller is further increased by reducing tip vortices using slots in the tip which have an effect on the flow pattern similar to the effect of proplets but at reduced cost of fabrication. Where additional turbulence is required so as to establish shear forces in the fluid or fluid suspension being mixed, the blade segments which define the slots may be twisted at angles different from the tip chord angle. These twisted segments increase turbulence and shear the material being mixed.
REFERENCES:
patent: 42887 (1864-05-01), Tibbits
patent: 61494 (1867-01-01), Westover
patent: 1150213 (1915-08-01), Little
patent: 1612028 (1926-12-01), Kincaid et al.
patent: 1916192 (1933-07-01), David
patent: 2045918 (1936-06-01), Moody
patent: 2193686 (1940-03-01), Craddock
patent: 2320733 (1943-06-01), McIntyre
patent: 2431478 (1947-11-01), Hill
patent: 2688992 (1954-09-01), Russo
patent: 3044559 (1962-07-01), Chajmik
patent: 3169694 (1965-02-01), Borchers
patent: 3514215 (1970-05-01), Williams
patent: 3885886 (1975-05-01), Richter
patent: 4004786 (1977-01-01), Stephens
patent: 4089618 (1978-05-01), Patel
patent: 4102600 (1978-07-01), Schwab
patent: 4147437 (1979-04-01), Jonqueres
patent: 4376515 (1983-03-01), Soe
patent: 4411598 (1983-10-01), Okada
patent: 4468130 (1984-08-01), Weetman
patent: 4571090 (1986-02-01), Weetman et al.
patent: 4636143 (1987-01-01), Zeides
patent: 4721394 (1988-01-01), Casto et al.
patent: 4722608 (1988-02-01), Salzman et al.
patent: 4802771 (1989-02-01), Weetman
patent: 4896971 (1990-01-01), Weetman et al.
patent: 4913670 (1990-04-01), Spranger
patent: 5112192 (1992-05-01), Weetman
patent: 5152606 (1992-10-01), Borraccia et al.
patent: 5158434 (1992-10-01), Weetman
patent: 5226783 (1993-07-01), Mita
patent: 5246343 (1993-09-01), Windsor et al.
patent: 5297938 (1994-03-01), Von Essen et al.
patent: 5326168 (1994-07-01), Miura
patent: 5344235 (1994-09-01), Weetman et al.
patent: 5525269 (1996-06-01), Connolly et al.
patent: 5813837 (1998-09-01), Yamamoto et al.
Morehouse Industries Product Literature, date unknown.
Ekato Product Literature, date unknown.
McDermott Keith
Weetman Ronald J.
Cooley Charles E.
General Signal Corporation
LandOfFree
Mixing impellers and impeller systems for mixing and blending li does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mixing impellers and impeller systems for mixing and blending li, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mixing impellers and impeller systems for mixing and blending li will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1502200