CN103041897B - Overlapped turbine type bead separator of medium stirring mill - Google Patents

Abstract

A stacked turbine-type bead separator for a medium-stirred mill, comprising: a stationary ring, a stacked turbine set, and an outer turbine. The static ring is installed on the side of the discharge chamber wall close to the grinding chamber, and each turbine plate has multiple vortex grooves, multiple inclined holes, and an annular diversion groove, and the three are connected to each other. One side of the stacked turbine group is in contact with the outer turbine, and the other side is separated from the static ring to form an appropriate annular discharge gap. When the main shaft drives the rotor and the turbine to rotate together, the vortex groove between the laminations generates centripetal suction to drive the slurry into the Guide ring groove, several inclined holes on the circulation groove drive the slurry to discharge along the axial direction to the discharge port. The centrifugal force generated when the outer turbine rotates causes the beads to be thrown out in the radial direction and make a radial circular motion to prevent the beads from accumulating around the bead separator and blocking the discharge of the material. The invention has low manufacturing cost, greatly improved grinding efficiency, and the grain size in the primary grinding slurry is obviously reduced. Compared with the traditional products of the same type, the output can be increased by 50% to 130%.

Description

Stacked Turbine Bead Separator for Media Agitated Mill

technical field

The invention belongs to the field of media stirring and grinding equipment, and in particular relates to a stacked turbine type high-efficiency bead separator for a media stirring mill. the

Background technique

At present, the conventional media stirring mill bead separation devices mainly include dynamic and static ring dynamic separation methods and pipe network static separation methods, which are widely used in coatings, inks, dyes, mining, biology, medicine, and electronic materials. In the field of fine grinding. The dynamic and static ring separation method only forms an annular discharge gap between the dynamic ring and the static ring. Due to the limited discharge space, under the action of the feed pump, many grinding beads accumulate around the separator and rub against each other to generate a large amount of heat. The temperature of the slurry increases and at the same time blocks the discharge of the material. Resulting in reduced grinding efficiency. Although the pipe network static separation method can increase the discharge space according to the increase of the diameter of the pipe network or the length of the pipe network, due to the static discharge method, when encountering a slurry with high viscosity or high consistency, the viscous The material will block the mesh due to bonding, making the separation device ineffective. Due to the low discharge efficiency of the original two separation methods and the repeated grinding of the materials retained in the grinding chamber, the temperature of the slurry in the grinding chamber is too high, which limits the grinding of some heat-sensitive materials. Therefore, inventing a high-efficiency dynamic separation device that integrates the separation function of dynamic and static rings and the characteristics of pipe network separation is of great significance to enterprises that manufacture and use medium stirring mills. the

Contents of the invention

The purpose of the present invention is to provide a stacked turbine type high-efficiency material bead separator for a medium stirring mill. The invention includes a stationary ring, a stacked turbine set and an outer turbine. The static ring is separated from the stacked turbine to form a ring-shaped appropriate discharge gap (adjustable), which realizes self-cleaning dynamic separation without sticking and clogging, and the slurry can be discharged smoothly. In the stacked turbine group, one side of each turbine sheet is a plane, and the other side has a plurality of vortex grooves, and several holes inclined at 45° are evenly opened in the axial direction, and the vortex grooves are opened on the same side of the laminations. An annular diversion groove connects the vortex groove and the inclined hole. After the turbine blades are stacked to form a plurality of turbine combinations, when the main shaft drives the turbine group, the turbine generates a strong centripetal force to drive the slurry into the annular diversion groove and flow to the inclined hole. The rotating inclined The hole generates an axial driving force, driving the slurry to flow to the discharge port in the axial direction. the

The direction of the vortex groove of the outer turbine is opposite to that of the laminated vortex groove. When the main shaft is driven, a centrifugal vortex is generated, which throws the grinding beads in the turbine, and drives the grinding beads to perform circular motion and radial circulation to prevent the accumulation of grinding beads. Blockage of slurry discharge around turbine stacks. the

Compared with the prior art, the present invention has the following advantages and beneficial effects: 

1) Due to the strong centripetal suction generated by the lamination vortex, under the suction of the lamination vortex groove, the slurry can be easily sucked into the lamination diversion groove and flow to the inclined hole, and the inclined hole on the lamination generates a strong shaft The driving force pushes the slurry in the diversion tank to the discharge port. Under the pressure of the external feed pump and the driving force generated by the stacked turbine group, the slurry is discharged smoothly and the flow rate is greatly increased. , production efficiency can be greatly improved.

2) Since the laminated turbine is a dynamic separation structure that generates its own driving force, it has a self-cleaning function, and the materials do not stick and block, and the discharge is smoother. the

3) Due to the action of the external turbine, the circular motion and radial circular motion of the grinding beads are enhanced, and the grinding effect is enhanced. More importantly, the throwing effect of the turbine prevents the accumulation of grinding beads and squeezes around the laminations to block the discharge of materials , so that the flow rate is further improved. At the same time, since the grinding beads are prevented from accumulating and extruding on the surface of the separator to cause grinding, the wear on the separator is reduced and the life of the separator is improved. the

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings. the

Fig. 1 is a schematic structural view of the stacked turbine type high-efficiency material bead separator of the present invention: 1-static ring, 2-stacked static turbine group, 3-outer turbine. the

Fig. 2 is a schematic diagram of the part structure of the turbine sheet in the present invention: 1-turbine groove, 2-annular guide groove, 3-feeding inclined hole, 4-turbine convex bone. the

Detailed ways

In order to better understand the present invention, the present invention will be further described below in conjunction with the accompanying drawings. As shown in Figure 1, the stacked turbine type high-efficiency bead separator of the present invention includes: a stationary ring (1), a stacked turbine set (2) and an outer turbine (3). The static ring (1) is mounted on the end plate of the grinding chamber, the outer turbine (3) is installed together with the stirring rotor, the left end of the stacked turbine group (2) is close to the outer turbine (3), and the right end is on the shaft shoulder Keep an appropriate discharge gap between the upper and the static ring (1). The size of the discharge gap depends on the viscosity of the slurry to be ground, the diameter of the grinding beads and the output requirements. the

As shown in Figure 2, the stacked turbine groups described in the present invention have the same size and structure, and each component contains: vortex groove (1), annular diversion groove (2), discharge inclined hole (3 ) and the turbine convex bone, the thickness of the turbine convex bone is the depth of the vortex groove (1), which is determined according to the characteristics of the grinding slurry, viscosity, grinding bead diameter and production requirements. When the turbine single piece rotates in the direction shown in Figure 2, the vortex groove (1) generates centripetal suction to drive the slurry into the annular diversion groove (2) and flows to the discharge inclined hole (3), and the discharge slope hole (3) generates The axial thrust drives the slurry to flow axially toward the outlet. The dual driving force generated by stacked turbos has greatly increased the discharge volume. the

According to the above-mentioned mechanism, the inventor has manufactured a media agitated mill with a grinding chamber volume of 30 liters, a pin-pin rotor with a drive motor power of 30 kilowatts and a stacked turbine bead separator, which has the same model as the original one. The grinding machine product of the dynamic and static ring bead separator is used for comparative industrial tests of grinding a kind of high viscosity automotive paint. According to the results of long-term industrial experiments, the grinding effect of this medium agitated mill with stacked turbine separator is greatly improved compared with the original ordinary dynamic and static ring separator, which is reflected in the following aspects:

1) Grinding efficiency has been greatly improved. Under the same working conditions, the working current of the original medium agitated mill motor is 36 amps, and the output is 180 kg/hour; while the working current of the medium agitated mill with stacked turbine separator is 38 amps, and the output is 400 kg / hour, and its output is 122% higher than that of the original medium stirring mill.

2) The particle size of the ground particles in the single grinding slurry is finer. Due to the increase of the stirring and throwing action of the external turbine, the surrounding grinding beads are fully moved and form a radial circular motion. The grinding effect is significantly improved, and the particle size in the primary grinding slurry is reduced by 2 to 3 microns compared with the original media stirring mill. the

3) The temperature of the discharged slurry is significantly reduced. Due to the throwing effect of the external turbine, it is avoided that the grinding beads accumulate and squeeze under the pressure of the feed pump, and rub against each other around the separator to generate a large amount of heat, which will cause the slurry to heat up. Under the same working conditions, the original medium stirring mill The discharge temperature is 63°C, while the discharge temperature of this stacked turbine separator media stirred mill is 51°C. the

4) The particle size distribution of the product is narrow. Under the same working conditions, the laser particle size analysis of the products produced after 4 times of grinding shows that the particle size distribution of the products produced by the media stirring mill with stacked turbine separators is: 0.1~4 microns accounted for 6%, 5 ~8 microns accounted for 89%, 9~10 microns accounted for 5%; while the particle size distribution of products produced by the original media agitated mill was: 0.1~4 microns accounted for 17%, 5~8 microns accounted for 64%, 9~12 microns accounted for 19%. the

The stacked turbine type material bead separator of the present invention has low manufacturing cost, can be widely applied to all media agitated mills, and has superior performance especially in the field of grinding and preparing slurry with medium and high viscosity. If the stacked turbine-type bead separator of the present invention is widely used, in terms of high efficiency, energy saving and emission reduction, the annual economic benefit in the industry involving the field of ultrafine grinding can reach hundreds of millions to billions of yuan. Therefore, the present invention has great popularization value and application prospect, and can be widely used in the field of superfine grinding of materials. the

Claims (1)

1. the present invention relates to a kind of closed assembly turbine type material pearl separator of medium stirring mill, contain: stationary ring (1), closed assembly turbine group (2) and outer turbine (3); Described stationary ring (1) is installed on grinding chamber end plate, and outer turbine (3) and stirring rotator are fitted together, and closed assembly turbine group (2) left end and outer turbine (3) are close to, and right-hand member withstands on the shaft shoulder and retains suitable discharging gap with stationary ring (1); The size in discharging gap is determined according to the viscosity of polished slurry, mill pearl diameter and output demand; Described closed assembly turbine group (2), every part size and structure identical, contain in each assembly: vortex groove, annular diversion trench, discharging inclined hole and the convex bone of turbine, namely the convex bone thickness of turbine be the vortex groove degree of depth, determines according to ground slurry characteristic, viscosity, mill pearl diameter and output demand; When turbine monolithic rotates, vortex groove produces centripetal suction and orders about slurry and enter annular diversion trench and flow to discharging inclined hole, and the axial thrust that discharging inclined hole produces is ordered about slurry and flowed toward discharging opening vertically; The double-driving force that closed assembly turbine produces makes discharge rate increase considerably.