Studies on the Durability of Roller Pump (VI)
1963 Volume 25 Issue 3 Pages 178-184
Details
1963 Volume 25 Issue 3 Pages 178-184
(1) The wears of roller pumps, treated with Molybdenum-disulfide, “Ceramic”, and the metallic lubricant “MOLUB-ALLOY”, were measured for 200 hours.
The degree of the wear of the side clearance increased in the following order, (Non-treated)>(Treated with Molybdenum-disulfide)>(Treated with “Ceramic”)>(Treated with “MOLUB-ALLOY”).
The coating of “MOLUB-ALLOY” was the most effective on the point of the wear.
(2) In the case of roller pump sintered with Molybdenum-disulfide, the wear of the side wall increased with the running, while that of the rotor became dull after 100 hours running.
(3) With the side wall, “Ceramic” being clinged to the inner wall, the side clearance increased due to the abrasion of “Ceramic” on the wall in spite of the slight wear of the rotor.
(4) The remarkable abrasion of roller occurs with both “Ceramic”-side wall and narrow side clearance such as 0.115mm.
The tendency is the same in case of roller pump sintered with Molybdenum-disulfide to the inner wall and the rotor.
(5) Every part of roller pump weaned on an average as the “MOLUB-ALLOY” is coated on rubbing inner surface.
(6) The changes of the total efficiency with the running by the anti-wear treatments of roller pump were compared.
Coating of the “MOLUB-ALLOY” showed the best result, while the “Ceramic”-side wall resulted in the worst.
(7) The wears of roller pumps, using Bordeaux mixture (6-3), (6-12), and (6-18) were compared for 200 hours.
The wear of the, pump using Bordeaux mixture. (6-3) was the least, and the degree of the wear among each part was graded distinctly.
(8) In a comparative test of the weight of roller (25, 30 and 35gr) of the same size, the remarkable difference of total efficiency appeared on side of high rpm (cf Fig. 11) and low delivery pressure (cf Fig. 12).
The best faculty was shown at 30 gr.
(9) Rotors made of Poly-Urethane, with three kind of gum hardness (191, 287, 290) were tested.
The strength of these rotors are not enough for practical use: delivery pressure 3kg/cm2 and pump revolution 1180 rpm.
