CN203678460U - Dual shaft drive wet media agitation grinder - Google Patents

Abstract

A double-shaft driven wet media agitator mill for grinding raw material particles in a process fluid into fine particles using a grinding medium and separating the grinding medium from the process fluid, comprising: a grinding cavity, a stirring device, a centrifugal device, and a circulation unit for driving the processing fluid to enter and exit a grinding chamber of the grinding cavity. The stirring device comprises a stirrer with a main stirring part positioned in the grinding chamber and a first motor unit for driving the stirrer to rotate, and the centrifugal device comprises a centrifugal seat with a main centrifugal part positioned in the grinding chamber and a second motor unit for driving the centrifugal seat to rotate. The structure can respectively adjust the rotating speed of the stirrer and the centrifugal seat according to the processing condition requirements so as to improve the grinding quality and the application range of the grinding machine.

Description

Dual shaft drive wet media agitation grinder

technical field

The utility model relates to a grinder, in particular to a biaxially driven wet medium agitation grinder which separates grinding media from processing fluid in a centrifugal manner.

Background technique

The media mixer is also called a grinder, which uses the kinetic energy generated by the rotation of the agitator to drive the raw material particles in the grinding chamber and the high-hardness grinding medium to generate high-energy-density impact and shear force, thereby making the raw material particles Miniaturized devices. After the raw material particles are miniaturized, the fine particles and grinding media are separated by a filter assembly with gaps or screens.

In the past, when the grinder was used, it was limited by the gap and the manufacturing conditions of the screen, and it was only suitable for making fine particles with a particle size greater than 0.3mm. The reason is that when the grinder used to make fine particles, the average particle size of the fine particles was about 1/1000 of the particle size of the media. For example, if you want to make fine particles with an average particle size below 100nm (0.1μm), you need to use a grinding medium with a particle size of 0.1mm, and the width of the gap between the filter components or the mesh of the screen must be smaller than the size of the grinding medium. Only when the diameter is less than 1/3, can the fine particles be effectively separated. That is to say, when the particle size of the produced fine particles is smaller, the width of the gap of the filter element or the aperture of the screen must be smaller. The limitation of the aforementioned processing conditions will not only cause difficulties in the manufacture of the filter element, but also make it more difficult to operate. Problems such as biting and clogging are prone to occur, so the conventional grinding machine cannot produce nano-sized fine particles.

In order to improve the aforementioned deficiencies, some patents propose to use the mixing mode of centrifugal and agitation to grind the raw material particles, such as the invention patent No. I355290 of Taiwan, China. The main feature of this type of grinding machine is to use a single shaft to drive the agitator and centrifugal simultaneously The seat rotates, and the stirring of the agitator can make the grinding medium and the raw material particles in the processing fluid collide with each other to achieve the purpose of miniaturizing the raw material particles, and the grinding media and the processing fluid are separated by the centrifugal seat. Although the previous centrifugal grinder can improve many problems of the early grinder, the size that can be grinded is still limited, and it is not suitable for high-viscosity processing fluid.

The reason for the aforementioned deficiency is that the development of the size of grinding media is getting smaller and smaller. That is to say, at the current industrial level, it is possible to produce grinding media with micron sizes such as 0.03mm, 0.015mm and 0.007mm. The size of the grinding media can grind out nano-scale fine particles. However, from the perspective of grinding, the smaller the size of the grinding media, the smaller and more uniform nano-dispersion can be obtained. In the past, the single-shaft grinder could not carry the grinding medium with a particle size of less than 0.05mm. The main reason is that under high fluid viscosity, the grinding medium with a particle size too small will flow out of the grinding chamber with the fluid, that is, the same speed as the stirring The centrifugal seat cannot separate the grinding media from the high-viscosity processing fluid. As a result, the amount of grinding media in the grinding chamber will be insufficient, and the grinding effect will be relatively poor.

On the other hand, if the grinding and separation operations are performed at a low rotational speed, the feed flow rate will easily cause the grinding medium to eject, so the grinding effect is not good. In addition, when the initial particle size of the raw material particles is too large, the centrifugal device at the same speed as the stirring is also unable to separate the grinding medium with a small density difference from the processing fluid, and it must wait until the particle size of the raw material particles is small enough to be separated. . Apparently, although the conventional single-shaft grinder can improve many shortcomings of the conventional grinder separated by filter components, its grindable size and application range are limited.

Contents of the invention

The purpose of the utility model is to provide a biaxially driven wet medium agitation grinder which saves electricity, has a wider application range, and can produce fine particles of smaller size.

The grinding machine of the utility model can use the grinding medium to grind the raw material particles in the processing fluid into fine particles, and separate the grinding medium from the processing fluid. The grinding machine comprises: a grinding cavity including a grinding chamber, a stirring device, a centrifugal device, and a circulation unit that drives the process fluid into and out of the grinding chamber of the grinding chamber. The stirring device includes a stirrer installed on the grinding chamber, and a first motor unit driving the stirrer to rotate, and the stirrer has a main stirring part located in the grinding chamber of the grinding chamber. And the centrifugal device includes a centrifugal seat installed on the grinding chamber, and a second motor unit that drives the centrifugal seat to rotate. The centrifugal seat has a grinding chamber located in the grinding chamber and is used for separating grinding media and processing The main centrifugal part of the fluid.

In the grinding machine described in the utility model, the stirrer of the stirring device and the centrifugal seat of the centrifugal device all rotate around a rotation center, and the rotational speed of the centrifugal seat is different from that of the stirrer.

In the grinding machine described in the utility model, the rotating speed of the centrifugal seat is higher than that of the agitator.

In the grinding machine described in the present invention, the centrifugal seat also has a centrifugal shaft part located on the rotation center and connected with the main centrifugal part, the centrifugal shaft part has a main channel, and at least one adjacent to the main centrifugal part and communicate with the main channel, and the circulation unit drives the processing fluid to advance along a circulation direction, and sends the processing fluid into the grinding chamber from the end adjacent to the agitator, and at the same time, the main channel of the centrifugal seat send out.

In the grinding machine described in the present invention, the main centrifugal part of the centrifugal seat has a base wall, several fan blades surrounding the rotation center and mounted on the base wall, and several fan blades respectively interposed between the fan blades. Adjacent to the centrifugal channels between two of them, the base wall has an assembly hole in the center, and the centrifugal shaft part is inserted in the assembly hole, and the communication channel of the centrifugal shaft part corresponds to the centrifugal channel.

In the grinding machine described in the present invention, the grinding cavity also includes a cavity wall, a bottom wall positioned below the cavity wall for the erection of the agitator, and a bottom wall positioned above the cavity wall for the erection of the centrifugal seat The cover wall, and the grinding chamber is jointly defined by the cavity wall, the bottom wall and the cover wall.

In the grinding machine described in the present invention, the cavity wall of the grinding cavity has an inner wall, an outer wall surrounding the inner wall, and a grinding chamber between the inner wall and the outer wall and surrounding the grinding chamber. A cooling space, and the grinder also includes a cooling system that sends cooling water into and out of the cooling space.

In the grinding machine described in the utility model, the circulation unit includes a premixing seat with a premixing tank, a premixer for stirring the processing fluid in the premixing tank, a connecting line connecting the premixing tank and the grinding chamber The feed pipe, a discharge pipe connecting the premixing tank and the main channel of the centrifugal shaft of the centrifugal seat, and a pump that is arranged on the feed pipe and sends the processing fluid to the grinding chamber; the One end of the feed pipe is installed on the bottom wall of the grinding chamber, and the circulation unit also includes a shaft seal for erecting one end of the discharge pipe in the main channel of the centrifugal seat.

The beneficial effect of the utility model is that: since the rotational speeds of the centrifugal seat and the agitator are controlled by different motor units, the rotational speeds of the agitator and the centrifugal seat can be adjusted according to different processing conditions to improve the separation effect of the grinder , At the same time, the grinding machine can be used in a wider range. On a grinding machine with the same production capacity, the total horsepower demand of the first motor unit and the second motor unit of the present invention is lower than that of the conventional grinding machine, so the purpose of power saving can be achieved.

Description of drawings

Fig. 1 is a diagram of the component configuration relationship of a preferred embodiment of the utility model grinder;

Fig. 2 is a partial sectional view of this preferred embodiment, illustrating the relative relationship of a grinding chamber, a stirring device and a centrifugal device of the grinding machine;

Fig. 3 is an incomplete perspective exploded view illustrating the partial structure of the centrifugal device.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

Referring to Figures 1, 2 and 3, a preferred embodiment of the grinding machine of the present invention is to use grinding media to grind raw material particles in a processing fluid into fine particles, and the grinding media can be separated from the processing fluid. In this preferred embodiment, the grinding medium is made of a material with a hardness higher than that of the raw material particles, and its particle size can be between 0.007-1000 mm, that is, this embodiment can use micron-sized grinding media to grind the raw material particles into nanoscale particles. In order to achieve the above purpose, the grinder in this embodiment includes: a grinding chamber 1, a cooling system 2, a stirring device 3, a centrifugal device 4, and a device that drives the processing fluid to flow continuously along a circulation direction Cycle unit 6.

The grinding chamber 1 comprises: a double-layer cylindrical chamber wall 11 surrounding a center of rotation 10, a bottom wall 12 at the bottom of the chamber wall 11, a cover wall 13 at the top of the chamber wall 11, and A grinding chamber 14 bounded by the cavity wall 11, the bottom wall 12 and the cover wall 13, the cavity wall 11 has an inner wall portion 111, an outer wall portion 112 surrounding the inner wall portion 111 and spaced apart , and a cooling space 113 between the inner wall portion 111 and the outer wall portion 112 and surrounding the grinding chamber 14 . The outer wall portion 112 has a cold water inflow pipe 114 and a cold water outflow pipe 115 spaced apart from each other. The bottom wall 12 has a first rack hole 121 that runs through and is positioned on the rotation center 10, and a raw material inlet 122 that runs through and communicates with the grinding chamber 14, and the cover wall 13 has a hole that runs through and is positioned on the grinding chamber 14. The second frame hole 131 on the rotation center 10 . In this embodiment, the cooling system 2 can send cooling water into the cooling space 113 through the cold water inflow pipe 114, and then send out the cooling space 113 through the cold water outflow pipe 115, so that the grinding of the grinding chamber 1 can be reduced. Chamber 14 milling temperature.

The stirring device 3 includes a stirrer 31 rotatably mounted on the first rack hole 121 of the grinding chamber 1, and a first motor unit 32 that drives the stirrer 31 to rotate around the rotation center 10. The stirrer 31 has a main stirring part 311 positioned in the grinding chamber 14, and a stirring shaft part 313 inserted upright on the first rack hole 121 of the bottom wall 12, the main stirring part 311 has several Stirring pieces 312 are arranged up and down at equal angles or dislocated, and a free end of the stirring piece 312 protrudes toward the cavity wall 11 of the grinding chamber 1 . In terms of design, the form of the agitating member 312 is not particularly limited, and it may also be other forms of agitating structures such as blades that can agitate the fluid. The first motor unit 32 has a first motor 321 and a first pulley set 322 power-connected to the first motor 321 and the agitating shaft portion 313 of the agitator 31 .

In this embodiment, the centrifugal device 4 includes a centrifugal seat 41 rotatably installed on the second frame hole 131 of the cover wall 13 of the grinding chamber 1, and a second centrifugal seat 41 that drives the centrifugal seat 41 to rotate around the rotation center 10. Two motor units 42, the centrifugal seat 41 has a main centrifugal part 411 which is located in the grinding chamber 14 of the grinding chamber 1 and is used to separate grinding media and processing fluid, and a main centrifugal part which is located on the rotation center 10 and is connected to the main centrifugal part. 411 is coupled in conjunction with the centrifugal shaft portion 412 whose top end passes through the second frame hole 131 . The main centrifugal part 411 has a disc-shaped base wall 413, several fan blades 414 mounted on the base wall 413 around the rotation center 10, and several adjacent fan blades 414 respectively interposed Between the two centrifugal passages 415 , the base wall 413 has an assembly hole 416 in the center. The centrifugal shaft part 412 is inserted in the assembly hole 416, and has a straight main flow channel 417 with an upward opening, and several communication flow channels 418 penetrating from the outer surface to the main flow channel 417. The flow channel 418 corresponds to the centrifugal channel 415 of the main centrifugal part 411 . And the second motor unit 42 has a second motor 421, and a second pulley set 422 that is powered to connect the second motor 421 and the centrifugal shaft portion 412 of the centrifugal seat 41. In this preferred embodiment, the first And the second pulley set 322, 422 is composed of a pulley and a belt. It can be understood that there may be only one communication channel 418 .

In this embodiment, the circulation unit 6 includes a premixing seat 61 with a premixing tank 611, a premixer 62 for stirring the processing fluid in the premixing tank 611, a line connecting the premixing tank 611 and the grinding chamber The feed pipe 63 of the raw material inlet hole 122 of the bottom wall 12 of the body 1, a discharge pipe 64 connecting the premix tank 611 and the centrifugal seat 41, and an end of the discharge pipe 64 mounted on the centrifugal seat 41 The shaft seal 66 in the main channel 417 of the shaft seal 66, and a pump 65 that is located on the feed pipe 63 and pumps the processing fluid into the grinding chamber 14, utilizes the installation of the shaft seal 66 to avoid the discharge The tube 64 rotates with the centrifugal seat 41 .

When the grinding machine of this embodiment is in use, the processing fluid is placed in the premixing tank 611 of the circulation unit 6, and after being stirred by the premixer 62, it is transported into the grinding chamber 14 by the pump 65 , and the grinding media used to grind the raw material particles in the processing fluid can be placed in the grinding chamber 14 of the grinding chamber 1, or driven into the grinding chamber 14 together with the processing fluid. At this time, the operator can determine the rotational speed of the agitator 31 and the centrifugal seat 41 according to the viscosity of the processing fluid and the difference in processing conditions such as the raw material particles to be ground. Preferably, in this embodiment, the linear velocity range of the agitator 31 can be controlled to be greater than 0 and less than or equal to 12m/s, and the linear velocity range of the centrifugal seat 41 can be controlled to be greater than 0 and less than or equal to 15m/s, The rotation speed of the agitator 31 is usually lower than the rotation speed of the centrifugal base 41 . Through the pump 65, the processing fluid in the premixing tank 611 is continuously sent into the grinding chamber 14 from the bottom, and the stirring and pushing of the agitator 31, the processing fluid will be due to the agitation of the agitator 31 and the processing fluid The push gradually passes through the agitator 31. When the processing fluid passes through the area where the agitator 31 is installed, the grinding media in the grinding chamber 14 will collide with the raw material particles in the processing fluid, and achieve the purpose of grinding and nanometerization.

When the ground processing fluid passes through the centrifugal seat 41, both the processing fluid and the grinding medium will be thrown away due to centrifugal force under high-speed rotation, but because the quality of the grinding medium is larger than that of the processing fluid, the grinding medium will be thrown away Relatively far away, since the pump 65 of the circulation unit 6 continues to push the processing fluid to wriggle forward, the processing fluid will enter the main channel 417 from the communication flow channel 418 of the centrifugal shaft part 412, and finally enter through the discharge pipe 64 The premix tank 611. Such continuous mixing, stirring and grinding can knock the raw material particles into fine particles of required size. During the rotation of the centrifugal seat 41, the relatively large grinding medium will be thrown out of the centrifugal channel 415 by the centrifugal force of the centrifugal seat 41, and then slowly settle to the area where the agitator 31 is set, that is, it will be The separated grinding medium can be continuously added to the stirring and grinding process, so that the raw material particles can be continuously collided and ground by the grinding medium to improve the grinding quality.

As can be seen from the above description, the grinding machine of the present invention uses the first motor 321 and the second motor 421 to drive the rotation of the agitator 31 and the centrifugal seat 41 respectively. Different rotation speeds are selected so that the agitator 31 and the centrifugal seat 41 have different transmission speeds. Therefore, when the utility model is applied to a high-viscosity processing fluid, and the raw material particles are prepared to be ground into nano-scale fine particles, as long as the grinding medium with a particle diameter of less than 0.03mm is selected, the rotation of the centrifugal seat 41 can be improved. speed, so that the grinding medium is easier to separate from the fine particles, and it can also improve the lack of difficulty in separating the grinding medium and raw material particles during low-speed grinding and initial grinding, so the grinding machine of the utility model not only has better grinding effect , It is also suitable for use in high-viscosity processing fluids, and in the fields of nano-processing particles at low speeds, so it also has the advantages of a wide range of applicable grinding. In addition, under the premise of the same production capacity, the total horsepower demand of the first motor 321 and the second motor 421 of the present invention is lower than that of the conventional grinder, so the present invention also has the effect of saving electricity.

Claims (8)

1. a Two axle drive wet type media agitator mill, can utilize abrasive media that the raw material particle in process fluid is ground to form to minuteness particle, and certainly in this process fluid, separate this abrasive media, this grinder comprises: one comprises the grinding cavity of a grinding chamber, an agitating device, a centrifugal device, an and cycling element that drives this process fluid to pass in and out the grinding chamber of this grinding cavity, this agitating device comprises an agitator being arranged on this grinding cavity, this agitator has the main mixing part of a position in the grinding chamber of this grinding cavity, and this centrifugal device comprises a centrifugal seat being arranged on this grinding cavity, this centrifugal seat has a centrifugal portion of master that is positioned at the grinding chamber of this grinding cavity and is used for separating abrasive media and process fluid, it is characterized in that:

This agitating device also comprises first motor unit that drives this agitator rotation, and this centrifugal device also comprises second motor unit that drives this centrifugal seat rotation.

2. Two axle drive wet type media agitator mill according to claim 1, is characterized in that: the agitator of this agitating device and the centrifugal seat of this centrifugal device are all rotated around a pivot, and the rotating speed of this centrifugal seat is different from the rotating speed of this agitator.

3. Two axle drive wet type media agitator mill according to claim 2, is characterized in that: the rotating speed of this centrifugal seat is higher than the rotating speed of this agitator.

4. Two axle drive wet type media agitator mill according to claim 3, it is characterized in that: the centrifugal axial region that this centrifugal seat also has a position and is connected on this pivot and with the centrifugal portion of this master, this centrifugal axial region has a sprue, and at least one connection runner that is close to this main centrifugal portion and is communicated with this sprue, and this cycling element drives process fluid to advance along a loop direction, and process fluid is sent in this grinding chamber by the one end that is close to this agitator, sent by the sprue of this centrifugal seat simultaneously.

5. Two axle drive wet type media agitator mill according to claim 4, it is characterized in that: the centrifugal portion of master of this centrifugal seat has a basal wall, several around this pivot and be arranged on the flabellum on this basal wall, and several adjacent wherein centrifugal channels between two in described flabellum respectively, this basal wall also has one and is positioned at central assembly hole, and this centrifugal axial region is plugged in this assembly hole, and the corresponding described centrifugal channel of the connection runner of this centrifugal axial region.

6. Two axle drive wet type media agitator mill according to claim 5, it is characterized in that: this grinding cavity also comprises a chamber wall, a diapire that set up below this chamber wall and for this agitator position, and a tegmental wall that set up above this chamber wall and for this centrifugal seat position, and this grinding chamber is jointly defined and forms by this chamber wall, this diapire and this tegmental wall.

7. Two axle drive wet type media agitator mill according to claim 6, it is characterized in that: the chamber wall of this grinding cavity has an inner wall part, one and be centered around the outside wall portions of this inner wall part outside, and one between between this inner wall part and this outside wall portions and around the cooling space of this grinding chamber, this grinder also comprises a cooling system of cooling water being sent and sent to this cooling space again.

8. Two axle drive wet type media agitator mill according to claim 7, it is characterized in that: this cycling element comprises that a premix seat with a premix groove, premixed device that is used for stirring the process fluid in premix groove, one connect the feed pipe of this premix groove and this grinding chamber, a discharge nozzle that connects the sprue of the centrifugal axial region of this premix groove and this centrifugal seat, and one is located on this feed pipe and by process fluid and delivers to the side Pu in this grinding chamber; One end of this feed pipe is arranged on the diapire of this grinding cavity, and this cycling element also comprises that the one end by this discharge nozzle is erected at the shaft seal in the sprue of this centrifugal seat again.

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