SU558696A1

SU558696A1 - Mixer for viscous materials

Info

Publication number: SU558696A1
Application number: SU2016960A
Authority: SU
Inventors: Нина Ивановна Шаталова; Николай Афанасьевич Афанасьев; Владимир Иванович Кукушкин
Original assignee: Отделение ордена Ленина института химической физики АН СССР
Priority date: 1974-04-22
Filing date: 1974-04-22
Publication date: 1977-05-25

Description

1one

Предложенный смеситель предназначен дл смешивани в зких материалов и может быть использован дл приготовлени пластмасс.The proposed mixer is intended for mixing viscous materials and can be used to make plastics.

Известен смеситель l , содержащий корпус, в котором установлены тихоходна и быстроходна лопасти, вращающиес одна навстречу другой по пересекающимс траектори м , причем скорости их вращени относ тс какцелые числа практически тольк 1:2.A mixer l is known, comprising a housing in which low-speed and high-speed blades are installed, rotating one towards the other along intersecting trajectories m, and their rotation speeds are like integers almost only 1: 2.

В таких смесител х процесс смешени протекает недостаточно интенсивно, ибо боквые поверхности лопастей полностью не они щаютс от налипающего на них материала 12.In such mixers, the mixing process is not intensive enough, because the side surfaces of the blades are not completely separated from the material sticking to them 12.

Известен смеситель, содержащий корпус с двум фигурными лопаст ми, вращающимс по пересекающейс траектории SJ . A mixer is known, comprising a housing with two shaped blades rotating along an intersecting trajectory SJ.

В этом смесителе боковые поверхности лопастей хорошо очищаютс от налипающего материала, но число оборотов лопастей должно быть одинаковым, что снижает интенсивность процесса перемешивани .In this mixer, the side surfaces of the blades are well cleaned of adhering material, but the number of revolutions of the blades should be the same, which reduces the intensity of the mixing process.

Цель изобретени - повышение эффективности перемешивани за счет интенсивной очистки боковых поверхностей лопаток обеих лопастей и повышение надежности смесител в работе.The purpose of the invention is to increase the mixing efficiency due to intensive cleaning of the side surfaces of the blades of both blades and increase the reliability of the mixer in operation.

Это достигаетс тем, что одна лопасть быстроходной мешалки смещена относитель оси симметрии в сторону, противоположную направлению вращени , на угол 16 22-36 This is achieved by the fact that one blade of the high-speed mixer is shifted relative to the axis of symmetry in the direction opposite to the direction of rotation by an angle of 16 22-36

На фиг. 1 - изображен смеситель в момент очистки вогнутой поверхности лопасти тихоходной мешалки; на фиг. 2 - положенке лопастей в момент очистки вогнутой поверхности лопасти быстроходной мешалки на фиг. 3 - положение лопастей в момент очистки наружных поверхностей быстроходной и тихоходной мешалок.FIG. 1 shows a mixer at the time of cleaning the concave surface of a low-speed agitator blade; in fig. 2 - the position of the blades at the time of cleaning the concave surface of the blade of the high-speed mixer in FIG. 3 - the position of the blades at the time of cleaning the outer surfaces of high-speed and low-speed agitators.

Смеситель имеет корпус 1, быстроходную 2 и тихоходную 3 мешалки одинакового радиуса, состо щие из двух лопастей и вращающиес с различными угловыми скорост ми одна навстречу другой по пересекающимс траектори м.The mixer has a body 1, a high-speed 2 and a low-speed 3 agitators of the same radius, consisting of two blades and rotating with different angular speeds one towards the other along intersecting trajectories m.

Claims

The blades of a low-speed agitator are located symmetrically relative to the axis of symmetry. and one blade is mixed relative to the axis of symmetry in the direction opposite to the direction of rotation. This angle of displacement is determined by the ratio of the angular velocities of the agitators and ranges from 16 22 to 36. In this case, the center distance of the agitators is determined from the following equation: 36 O. R-vp 2 RCOS and the ratio of the radii lies within - 0.3 t 0.9 where R is the radius of the agitator, 1 is the radius of the agitator hub, n is the cleaning cycle of the agitator blades . When these conditions are met, the value of t is 6, 8, 9, 10, and 12, and the angle of displacement of the blade of the high-speed stirrer is 36, respectively; 25 ° 43; 22 ° 30; 20 ° and 16 ° 2l. The maximum mixing efficiency is ensured at the angle of displacement of the blade 36, n 6 and Y 0, i.e. in the zone of displacement, the blades have the greatest contact length. In the presence of a hub, the optimum angle of displacement of the blade is an angle of 25 43 with n 8. In this case, the value of the hub radius is minimal. The mixer works as follows. When rotating the mixers, one towards the other material carefully kneads, moves and mixes intensely. The tangent stresses arising from the contacting of the surfaces of the mixers contribute to the sensitization of the movement processes. Due to the difference in the angular velocity of the high-speed and low-speed agitators and the displacement of the blade of the high-speed agitator relative to the axis of symmetry, the concave and convex surfaces of the blades of both agitators are cleaned. Claims of the invention A mixer for viscous materials, comprising a housing, a low-speed and high-speed agitator, consisting of two blades and rotating at different angular speeds one towards the other along intersecting trajectories, characterized in that in order to increase the mixing efficiency due to intensive mutual cleaning the blades of the agitators, and improving the reliability of the mixer in operation, one blade of the high-speed agitator is offset from the axis of symmetry in the direction opposite to the direction of rotation by an angle of 16 ° 22-36 °. Sources of information taken into account in the examination 1. Shterbachek 3., Traus P. Mixing in the chemical industry. L., Goskhimizdat, 1963, p. 353.

2.Filin V.Ya. Modern constructions of mixers for loose and pasty materials in the USSR and abroad, INITIHIMNEFTEMASH, series HM-1, 1972 p. 6.

3. The patent of Germany No. 1199737. class 12 e 4/01 bt O7.12.1961

FIG. 2