SU1604448A1 - Roll disperser - Google Patents

Abstract

The invention relates to roller dispersers and allows to improve the quality of dispersion by using the effects of cavitation and volume displacement while simplifying the design. The disperser comprises a rotor 10 with rollers 5 installed in its grooves. On the inner surface of the housing 1 there is a roller track 3 eccentric to the axis of the housing. The rollers 5 are hollow and installed with a gap between them and the ends of the lid and body equal to 0.05-0.5 mm. 4 il.

Description

FIELD OF THE INVENTION The invention relates to chemical and agricultural engineering, in particular, to equipment for the production and use of chemical plant protection products using the methods of general impact and mechanical activation on heterogeneous working media.

The purpose of the invention is to increase the quality of dispersion by using the effects of cavitation and volumetric displacement while simplifying the design

Fig. 1 schematically shows a dispersant, a longitudinal section; Fig 2 is a section A-A; Fig 2 is a diagram showing the suction, compression, discharge, direction of movement and flow of the injected flow; FIG. 4 shows the decomposition of the roller disperser in the tank and the flow pattern of the working medium in it.

The roller disperser consists of body 1 and 2r caps. The inner surface of body 1 is eccentric with its axis. The cove track Zo. In case I, channel 4 is made to supply working medium to the working area of rollers 5 and bore 6 for seals, bearing 7 and bar 8o In case 1 a drive shaft 9 is placed, on which rotor 10 is rigidly fixed, provided with radial grooves 11 for rollers 5 o Rollers 5 are hollow to ensure forced bubbling of fluid in them and placed in radial grooves 11 and between the ends Cover 2 and Kopusov I with clearance 0.05-0.50 mm ka a gravitational flow of the working fluid from one part of the working zone B rollers druguyuo

A gap of 0.05-0.5 mm is optimal from the point of view of ensuring the working cycle: suction, compression, working fluid cavitation and removing it from the working area of the rollers IS to the consumer. Increasing the gap reduces the efficiency of cavitation dispersion, reducing the gap leads to an increase in energy consumption. and reduce the efficiency of the dispersant,

In Krishka 2, holes 12 are made to divert the working medium from the working area of the rollers to the consumer, in the case of a roller disperser in the submersible version in the valve 2 rectifier

About Q

5 Q

five

It is recommended to perform channel 13, and in case 1 - channel 14 dp to ensure the upward and downward movement of the working medium in the 15 ° tank.

In the case of the roller disperser in the remote version, the channels 4, 14 and the openings 12 are supplied with fittings (not shown) for connection with the source of the working medium and the consumer of the finished product

Roller disperser works as follows

When the rotor 10 rotates from the drive shaft 9, the rollers 5 are pressed by the centrifugal force to the eccentric roller track 3 and, slipping in the radial grooves 1, roll along it, crushing the solid components of the working medium. Due to the eccentricity of the roller track 3, the rollers move back and forth 5 in the radial grooves 11 of the rotor 10c. In this case the volumes of the radial grooves 11 and the volumes 16 (FIG. 2) that are free from the rollers 5 change from a minimum to a maximum per revolution of the rotor 10

When increasing the volumes of the radial grooves 11 and volumes 16 through the channels 4, the working medium is sucked in, it flows over the face and radial gaps between the rollers 5 and the rotor 10, the body I and the key 2, and the volumes 16 and the radial grooves 11 contact them. and voids of the rollers 5 working medium (Fig, 3) o

With a decrease in the volume of 16 radial grooves 11, the working medium is compressed, collapsing the cavities formed during suction, cavitation flow of the working medium along the end and radial gaps between the rollers 5 and the rotor elements 10 in contact with them, the housing I and the crushing 2 through the hole 12 and / or into channels 13, 14 and into a container of 15 °. In this case, a natural slit filtering of the suspension occurs, dropping large particles to the periphery and crushing them. If the particles are not crushed and / or form hardening, then p 5, the latter are buried in radial grooves. A gap is formed between the roller road 3 and the rollers 5 In this gap, the working medium rushes in at high speed, which, due to shear stresses, destroys the work hardening or knocks out uncapable particles for repeated grinding

Making the roller track directly on the body simplifies the design and manufacturing technology of the roller disperser, eliminates the unorganized flow of fluid from one sealed chamber to another (compared to the option of the insert grinding ring) at the interface points of the insert grinding ring with the housing. The apparent dispersion of the roller disperser , for example, due to the replacement of a worn grinding ring with a new one, it is unjustified, since together with the worn ring it is necessary to change the rollers, as well as e body and cap due to wear of their end walls

I

Making rollers hollow

provides trl of basic functions; cavitation flow of fluid through the end gaps between the housing and the rollers, as well as between the rollers and the lid from the zone of increased pressure into the void zone of the roller and the output: this ensures cavitational processing of the product into the void; rollers: mixing of the working medium in the cavities of the rollers due to the bubbling of what happens when the rollers roll along an eccentric roller track and rotate them around its axis; at the same time .. the emerging centrobel field rejects the particles to the ends of the K9pusa and the lid, Toe is in the zone of intensive cavitation and abrasive effect, which increases the quality of D11pergulation j and, finally, the function of the spool: this eliminates the need for a special switchgear, which simplifies kokstruktsiyo

The eccentric roller track serves to suck in and out of the medium as a result of the formation of variable volume chambers as well as for. performing the role of an anvil (and the rollers are a hammer), which ensures the splitting of solid particles between the track and the roller. This improves the quality of dispersion of the cavitation effect that occurs when chambers of variable volume are formed. However, the appearance of cavitation and, consequently, the effect of it is different.

In the suction zone (figoZ), vacuum cavitation occurs. Toe, liquid boils up with the formation of large gas bubbles — cavities j that do not collapse and, therefore, do not have a destructive effect.

In the compression zone, an increase in pressure occurs and, consequently, the collapse of cavities. This causes an abundance of cumulative microstructures, which, moving at speeds of 800–1000 m / h, cause large shear stress and destruction of the working parts. environment

In the exit zone, there is mainly cavitation jet operation, the working medium from the shlty zone through the end gaps between the rollers and, the roller and the gun is injected into the void zones of the rollers 5, which mainly cavitates the working medium in a closed volume. At 25, this collapses No. psrokave.rn is due to the impact of the plow with each other and with steppe; and apparatus.,

Roller rolling on eccentric roller; Torol kg God: massive; aog-30 gui of rollers on solid particles of the processed medium At the same time, an eccentric rolt track and rollers form a gap equal to the size of the dispersion Through this gap, 22 as well as through the end clearances between

With rollers and housing, rollers and a crest, a jet may expire from the zone of new pressure to a zone with less pressure, and in the zone of suction, and in this case, the cavitational treatment of the working medium also occurs in the suction zone. , cavita1 ion) -1a, the treatment of Jatie is carried out in

d5 of all zones is of a general nature. However, the efficiency of cavitation processing is different.

The efficiency of cavitating processing depends not only on the zone, but also

0 and from. Zazo1 values) a. With very small gaps (megg-e 0.05 we), the efficiency of kakai} tional treatment of the viscous area of compression (due to static and Xteni) increases, 2 but decreases in the output and suction zones. At the same time, eng1o dramatically increases energy consumption and the temperature of the working environment; All this makes the B5 5 pol1ge of the gap less than 0.05 mm undesirable.,

With very large gaps (more than 0.5 mm), the efficiency of cavitation treatment in the compression zone decreases and increases in the outlet and suction zones due to more powerful jet flows of the medium from the pressure zone to the reduced pressure zone U

.

Thus, a gap of 0.05-0.5 mm

is optimal for each zone

The effectiveness of the invention lies in the absence of additional {injection devices, since the roller disperser oam works as a volumetric blower, simplicity of construction} - the possibility of simply adjusting the grinding fineness and grinding of crushable particles, for example, by increasing the rotor speed 10 and, therefore, crushing pressure centrifugal force acting on the rollers 6, the use of the effects of mechanical destruction and hydrodynamic cavitation, bubbling of the working medium in the voids of the rollers 6, high The overflow jets and speeds for self-cleaning of the roller disperser from work hardening, the use of the collapsing effect under high pressure of cavities and the effect of slit filtration allows to obtain high quality products

Claims (1)

Invention Formula Roller disperser, containing a rotor mounted in a housing with a crush, rollers placed in its grooves, in contact with the roller track and installed between the ends of the casing and the crush with a gap, channels for supplying and discharging the medium, which is characterized by the fact that dispersion by using the effects of cavitation and volumetric displacement while simplifying the design, the roller track is placed on the inner surface of the housing eccentric to its axis, while the rollers are hollow and the gap between the rollers and ends of the claws and body is 0.05 - 0.50 mmo / city / -3 --5 Compiled by No Fedorov P f ± Lf: 2 ± l J f - - corrector in, girn to 1 g. VNIIPY State ETA on inventions and discoveries at the State Committee on Science and Technology of the USSR 4/5, Zh-35, Raushsk nab. Production and publishing combo:;: G ;; 1 ;;;; : t:; ; : t; ™ YU