CN100387351C - Particle grinding device - Google Patents

Abstract

The present invention relates to a particle polishing apparatus, and more particularly, to a separation structure of a particle polishing apparatus. The separation structure is composed of two sets of staggered coaxial blades, a gap is formed between the edge of the adjacent peripheral blade and the edge of the inner ring blade to be used as a particle screening mechanism, the edge part of the inner ring blade is higher than the inner ring part, so that the interval between the peripheral blade and the inner ring part of the inner ring blade is larger than the gap, and the ring part of the inner ring blade is provided with a plurality of guide holes. Once the particles are small enough to pass through the gap, they can quickly enter the larger space and flow out of the guide hole.

Description

Particle grinding device

technical field

The invention relates to a particle grinding device, in particular to a separation structure of the particle grinding device.

Background technique

Among the many nanoparticle manufacturing methods, the wet grinding and dispersing method and equipment have the advantages of low cost, large output and easy operation. The wet grinding device uses mechanical force to drive the raw material particles to collide with the high-hardness grinding medium, so that it produces high-energy-density impact and shear force to make the particles finer. That is, the particles and the grinding dispersion medium are introduced into the grinding machine together, wetted by the grinding liquid, and then the raw material particles and the grinding medium are stirred with blades or other mechanical devices, so that they collide with each other at a very high speed to produce grinding The effect; through a certain separation structure, the particles that are ground to a certain extent can be separated from the grinding medium and flow out to the powder collection place with the liquid.

The separation structure of general grinding devices often uses structures such as gaps, blades or screens to separate grinding media and particles. In order to obtain a smaller particle size, focus on the use of grinding media with smaller particles, so it is necessary to minimize the gap, the sieve pores of the blades or the screen, but it is also easy to cause clogging and back pressure, which affects production efficiency . Therefore, in order to avoid clogging, it is necessary to adopt a design that reduces the back pressure and increases the flow rate, but increasing the flow rate and reducing the sieve pores are contradictory.

For example, the U.S. Patent No. 5,620,147 uses a micron-sized sieve to separate the final ground particles from the grinding media. However, since the particles of the grinding medium itself are quite fine, it is easy to cause blockage and wear to the pores of the screen, thereby affecting the separation effect of the screen. Or, as in U.S. Patent No. 5,346,145, a small gap is used as the discharge port of the grinding device, so that the particles that have been ground to the standard can pass through. Similarly, the grinding medium is also easy to cause wear and blockage at the discharge port of the gap, which will have adverse effects. In addition, the use of mechanical screening is limited by the pore size of the mechanical structure itself, and cannot achieve a finer grinding particle size.

Another example is the Chinese Taiwan No. 451750 patent, which forms a sieve device by stacking several disk-shaped sieve filters. Through the gap created between any two adjacent sieves, the ground particles and grinding media are separated. The disc-shaped sieve filter forms a rotating screen, and there is no relative movement between the gaps, so the gaps used to separate particles are prone to blockage and wear.

Therefore, future technology development needs to be designed with the goal of increasing the flow rate and using smaller grinding media. In addition, the collision between raw material particles and high-hardness grinding media will cause heat release. In order to produce high-energy-density grinding , It is necessary to strengthen the cooling and heat dissipation design of the grinding equipment.

Contents of the invention

In order to get rid of the shortcomings of the prior art, the present invention provides a particle grinding device, which is characterized in that the separation structure design for separating particles and grinding media is composed of two sets of staggered coaxial blades, and the adjacent peripheral blades and inner blades A gap is formed between the ring blades, so that the ground particles can be collected after passing through the gap.

The particle grinding device of the present invention is provided with a grinding tank, and the grinding tank is filled with appropriate grinding liquid, and raw material particles and grinding media are added, and then stirred by dispersing blades, so that they collide with each other at a very high speed to produce a grinding effect ; And through the separation structure set in the grinding tank, the particles that have been ground to a certain extent can be separated from the grinding media and discharged. Its separation structure is composed of two sets of staggered coaxial blades. A gap is formed between the edge of the adjacent peripheral blade and the edge of the inner ring blade as a screening mechanism for particles. The edge part of the inner ring blade is higher than the inner ring part , the distance between the peripheral blade and the inner annular portion of the inner ring blade is greater than the gap, and the annular portion is provided with a plurality of guide holes. Once the particle size is small enough to pass through the gap, it can quickly enter the larger gap and flow out through the guide hole. Because the time for the particles to pass through the gap is very short, that is, they enter the inner annular part of the inner ring blade and flow out, so it can effectively avoid particle blockage, reduce the back pressure and increase the flow rate.

In addition, in order to improve the heat dissipation performance of the particle grinding device, the present invention further includes a cooling channel design, and a spiral cooling channel is formed on the periphery of the grinding tank. At the same time, in order to take away the heat generated by the collision between the inner ring blades and the grinding medium or particles, the inside of the shaft center of the inner ring blades can also be hollowed out and injected with cooling liquid as a cooling channel for the shaft center.

Description of drawings

Fig. 1 is the schematic diagram of the separation structure of the embodiment of the present invention;

Figure 1A is a schematic diagram of the screening mechanism of the embodiment of the present invention;

Fig. 2 is a schematic diagram of the shape of the inner ring blade of the embodiment of the present invention;

Figure 3 is a schematic diagram of a particle grinding device according to an embodiment of the present invention; and

Fig. 4 is a schematic diagram of the indirect transmission of the rotating shaft according to the embodiment of the present invention. in the picture

100 Separation structure 110 Peripheral blades

120 Inner ring blade 121 Guide hole

130 Fixing piece 140 Washer

150 Shaft center 151 Shaft cooling channel

200 grinding tank 210 dispersion blade

220 Spiral Cooling Channel 230 Feed Port

240 drive pulley 300 motor

310 belt 320 turning pulley

Detailed ways

Please refer to FIG. 1 , which is a schematic diagram of a separation structure of an embodiment of the present invention. The separation structure 100 includes a group of peripheral blades 110 and a group of inner ring blades 120. The peripheral blades 110 form a ring shape and have a plurality of corresponding through holes to provide the fixing member 130 to pass through to fix the plurality of peripheral blades 110. The fixing member 130 passes through each peripheral blade 110 and passes through a gasket 140 at the same time, so that an appropriate distance can be maintained between two peripheral blades 110 to accommodate an inner ring blade 120 . Each inner ring blade 120 is fixed on the shaft center 150 with an appropriate distance to drive the inner ring blade 120 to rotate, so that an appropriate distance can be maintained between the inner ring blades 120 to accommodate a peripheral blade 110, so that the peripheral blade 110 It is coaxially staggered with the inner ring blade 120 . The inner blade 120 rotates relative to the outer blade 110, and a gap is formed between the edge of the adjacent outer blade 110 and the edge of the inner blade 120, and particles enter the gap from the direction of the arrow to form a screening mechanism. Please refer to FIG. 1A , which is a schematic diagram of the screening mechanism of the embodiment of the present invention. There is a slight gap between the edge of the inner ring blade 120 and the peripheral blade, and the edge portion of the inner ring blade 120 protrudes higher than the inner side, so that the distance between the outer peripheral blade 110 and the inner side of the adjacent inner ring blade 120 is greater than the edge between the two In some gaps, particles need to be ground to a size smaller than the gap to pass through.

Please refer to FIG. 2 , which is a schematic diagram of the shape of the inner ring vane according to an embodiment of the present invention. And the edge portion of the inner ring blade 120 is higher than the inner annular portion, and the inner annular portion of the inner ring blade 120 is provided with a plurality of guide holes 121, so that the particles of sufficient size to pass through the gap can quickly enter a larger interval and be guided by the guide hole. Hole 121 flows out and is separated.

The above-mentioned separation structure needs to be combined with a particle grinding device, please refer to Fig. 3, which is a schematic diagram of a particle grinding device according to an embodiment of the present invention. A grinding tank 200 is provided, and an appropriate grinding liquid is filled in the grinding tank 200, and grinding media and The raw material particles are agitated by the dispersing blades 210 to generate collisions to grind the raw material particles into fine particles. The separation structure 100 is set in the grinding tank 200 to separate and discharge the particles from the grinding media. After the raw material particles enter the grinding tank 200 from the feed port 230, they are first stirred by the dispersing blades 210 to produce collisions. When the raw material particles form particles with a size sufficient to pass through the gap, they can quickly pass through the gap through the peripheral blades 110 and enter the space between the inner ring blades 120. It is separated by flowing out from the guide hole. On the periphery of the grinding tank 200, a spiral cooling channel 220 is provided to reduce the temperature of the grinding tank 200, and at the same time, to take away the heat generated by the collision between the inner ring blade 120 and the grinding medium or particles, the inner ring blade 120 also turns the rotating shaft The interior of the shaft 150 is hollowed out and filled with cooling liquid to serve as the shaft cooling channel 151 . In addition, in order to maintain the accuracy of the rotation axis of the inner ring blade 120 , the shaft center 150 of the inner ring blade 120 is driven by an indirect transmission mode through the transmission pulley 240 .

Please refer to FIG. 4 , which is a schematic diagram of the indirect transmission of the rotating shaft according to the embodiment of the present invention. The external rotating motor 300 is used as the active rotating component, and the rotating pulley 320 of the motor 300 is connected with the driving pulley 240 of the inner ring blade shaft of the grinding device with the belt 310, and the inner ring is driven by the rotation of the motor 300 through the driving pulley 240 through the driving pulley 240. The center of the rotating shaft of the ring blade is controlled by indirect transmission to control the rotation of the rotating shaft, which can avoid the angular deviation of the rotating shaft.

Although the preferred embodiment of the present invention is disclosed as above, it is not intended to limit the present invention. Anyone who is familiar with the related art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of patent protection shall be defined in the scope of patent application attached to this manual.

Claims (7)

1. a particulate lapping device is provided with a grinding groove, and the suitable lapping liquid of filling in this grinding groove, and add abrasive media and feed particles stirs with distribution blade again, it is run foul of each other and feed particles is ground to form particulate, it is characterized in that:

In this grinding groove, be provided with an isolating construction, so that particulate separates with abrasive media and discharges particulate, this isolating construction comprises one group of peripheral blade and one group of inner ring blade, this periphery blade and this inner ring blade are with shaft staggered, this inner ring vanes fixed is in a rotating shaft core, making it drive this inner ring blade should rotate by the periphery blade relatively, adjacent should the periphery blade edge and this inner ring blade edge between form a slit, the edge of this inner ring blade is higher than the inboard, the interval that makes this periphery blade and adjacent this inner ring blade inboard is greater than this slit, and the inboard annulus of this inner ring blade is provided with a plurality of guide holes, feasible particulate by this slit, separated by this guide hole outflow;

Wherein should become a ring-type by the periphery blade, a plurality of through holes with correspondence, with provide a fixture to place to fix a plurality of should the periphery blade, this fixture should run through a packing ring by the periphery blade simultaneously by each simultaneously, made adjacent two should keep a spacing with ccontaining this inner ring blade between the blade of periphery.

2. particulate lapping device according to claim 1 is characterized in that: keep a fixed interval in this rotating shaft core between adjacent two these inner ring blades, with ccontaining should the periphery blade.

3. particulate lapping device according to claim 1, it is characterized in that: this rotating shaft core is hollow tubular, and its hollow space injects cooling liquid with as the axle center coolant flow channel.

4. particulate lapping device according to claim 1, it is characterized in that: the periphery of this grinding groove is provided with the coolant flow channel of helical form.

5. particulate lapping device according to claim 1, it is characterized in that: also comprise a rotation motor, have a rotating pulley, this rotating pulley is connected in one of this rotating shaft core driving pulley by belt relatively should periphery blade rotation to drive this inner ring blade.

6. an isolating construction is applied to the particulate lapping device with separating particles and abrasive media, it is characterized in that this isolating construction includes:

One group of peripheral blade should be kept a spacing by the periphery blade for adjacent two;

One group of inner ring blade, this periphery blade and this inner ring blade are with shaft staggered, this inner ring vanes fixed is in a rotating shaft core, making it drive this inner ring blade should rotate by the periphery blade relatively, adjacent should the periphery blade edge and this inner ring blade edge between form a slit, the edge of this inner ring blade is higher than the inboard, the interval that makes this periphery blade and adjacent this inner ring blade inboard is greater than this slit, and the inboard annulus of this inner ring blade is provided with a plurality of guide holes, feasible particulate by this slit, separated by this guide hole outflow;

Wherein should become a ring-type by the periphery blade, a plurality of through holes with correspondence, with provide a fixture to place to fix a plurality of should the periphery blade, this fixture should run through a packing ring by the periphery blade simultaneously by each simultaneously, made adjacent two should keep this spacing with ccontaining this inner ring blade between the blade of periphery.

7. as the isolating construction as described in the claim 6, it is characterized in that: keep a fixed interval in this rotating shaft core between adjacent two these inner ring blades, with ccontaining should the periphery blade.

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