JP2021041400A - Dispersion device - Google Patents

Abstract

To provide a shear type dispersion device which prevents reverse flow of a mixture to the rotary shaft side to prevent the mixture from being dried and containing air bubbles.SOLUTION: A shear type dispersion device 1 supplies a slurry or liquid mixture 5 and disperses the mixture. The shear type dispersion device 1 includes: a bearing 14; a rotary shaft 16 which is supported by the bearing 14 in a manner that the rotary shaft 16 can rotate around a vertical axis; a stator 3; a rotor 2 which is disposed so as to face a lower surface of the stator 3 and is fixed to the rotary shaft 16 to be rotationally driven; and an air purge seal mechanism 40 which supplies air to a gap 4 which is located between an upper surface 2a of the rotor 2 and the lower surface of the stator 3 and supplied with the mixture. A mixture supply port 32 is provided at the stator 3. At an area located between an opening end 32a and the rotary shaft 16 in the gap 4, a base part is fixed to one of the rotor 2 and the stator 3 and a seal member 41 with which a tip part elastically contacts is provided at the other.SELECTED DRAWING: Figure 1

Description

The present invention relates to a disperser that disperses substances in a slurry or liquid mixture.

Conventionally, a plurality of liquids or slurries are passed through a narrow gap between a rotor that rotates at high speed and a stator that does not rotate, and a powdery substance in the plurality of liquids or slurries is continuously passed by a high shearing force generated by high speed rotation. There are known devices that disperse in. Here, "dispersion" means that the powdery substance in the slurry is made fine and uniformly present, or that the powdery substance in the slurry is uniformly present, or that a plurality of liquids are uniformly mixed. Means that.

The following Patent Document 1 is a specific example in which the apparatus having the above configuration is disclosed. The apparatus disclosed herein includes an air purge seal mechanism as a configuration for preventing the mixture supplied between the rotor and the stator from flowing back to the rotating shaft side of the rotor.
In this disperser, when the mixture is supplied between the rotor and the stator, as a normal operation mode, the mixture moves outward in the radial direction of the rotor by centrifugal force, and finally the gap between the rotor and the stator. Is released to the outside. However, when the amount of the supplied mixture exceeds a predetermined value, the supply pressure of the mixture causes the mixture to flow back toward the rotation shaft side of the rotor. The backflowing mixture invades the bearings that support the rotating shaft and interferes with the rotation of the rotating shaft and rotor.

Therefore, the above device supplies air having a predetermined pressure to the space outside the rotating shaft, introduces air into the gap between the rotor and the stator communicating with the space, and the pressure of the air causes the mixture to move to the rotating shaft side. A configuration (air purge seal mechanism) was adopted to prevent backflow to the air.

Japanese Patent No. 5768946

By the way, in the air purge seal mechanism adopted by the apparatus described in Patent Document 1, when the amount of the mixture supplied to the gap between the rotor and the stator becomes larger than the amount of the mixture discharged from the gap after the dispersion treatment. It prevents backflow to the bearing side, but when the amount of the mixture exceeds a predetermined amount and the supply pressure of the mixture becomes larger than the air pressure supplied to the outer space of the rotating shaft, the backflow to the rotating shaft side Had a problem that occurred.

Further, even if the dispersion treatment is performed in a form in which backflow does not occur, there is a problem that the mixture is dried by the air introduced into the gap between the rotor and the stator, and the quality of the mixture is changed.
Further, there is a problem that a large number of bubbles are contained in the mixture due to the supply of air, the fluidity of the mixture is lowered and it becomes difficult to discharge the mixture, and the defoaming treatment of the mixture is required in a subsequent process.

The present invention has been made in view of the above circumstances, and prevents backflow of the mixture to the rotating shaft side to ensure normal operation, drying the mixture, and dispersing bubbles in the mixture. The challenge is to provide the equipment.

The present invention employs the following means in order to solve the above problems.
That is, the present invention is a shear-type disperser that supplies a slurry-like or liquid-like mixture and disperses the mixture, and is rotatably supported by the bearing and the bearing about an axis in the vertical direction. The rotary shaft, the fixed stator, the rotor arranged so as to face the lower surface of the stator, fixed to the rotary shaft and rotationally driven by the rotary shaft, and the space outside the rotary shaft are passed through. An air purge seal mechanism for supplying air to the gap to which the mixture is supplied between the upper surface of the rotor and the lower surface of the stator is provided, and the stator is provided with an opening end located on the upper surface of the rotor. A mixture supply port is provided, and a base portion is fixed to either one of the rotor and the stator between the open end and the rotation shaft in the gap, and the tip portion elastically contacts the other. It is characterized in that a sealing member is provided.

According to the present invention, since the sealing member is provided in the gap between the rotor and the stator, the mixture does not flow back in the direction of the rotation axis, and air enters the mixture from the rotation axis side. Therefore, normal operation is always ensured, and drying of the mixture and mixing of air into the mixture are prevented.

In one aspect of the present invention, the first pressure sensor for detecting the supply pressure P1 of the mixture in the gap supplied to the outer side in the radial direction of the rotor with the seal member as a reference, and the rotor of the same. A second pressure sensor that detects the air pressure P2 in the gap supplied to the inward side in the radial direction, the first pressure sensor, the air pressure P2, or the air pressure P2 based on the output of the second pressure sensor. A control device for controlling the amount of the mixture supplied to the mixture supply port is provided.

According to this aspect, in the gap between the rotor and the stator, the mixture supply pressure P1 on the radial outer side of the rotor from the seal member and the air pressure P2 on the rotation shaft side of the seal member are controlled. Deformation of the seal member can be suppressed, the air pressure P1 can be increased to increase the supply amount of the mixture, and the production capacity of the apparatus can be increased.

In one aspect of the present invention, the sealing member is a member formed of an elastic material and includes a lip extending from the base portion and having its tip elastically abutting the other. And.
According to this aspect, during operation of the apparatus, the lip of the sealing member slides into contact with the rotor or the stator, and the sealing member accurately performs the sealing function to prevent backflow of the mixture in the rotation axis direction.

In one aspect of the present invention, the stator is formed with an annular groove centered on the axis of the rotating shaft on the lower surface thereof, and the seal member is formed by the annular base portion fixed to the annular groove and the annular base portion. It is characterized in that it includes the lip that extends from the base portion to the upper surface of the rotor while expanding its diameter, and the tip portion thereof abuts on the upper surface.
According to this aspect, since the lip of the sealing member extends to the upper surface of the rotor while expanding its diameter and its tip abuts on the upper surface of the rotor, the elastic deformation of the lip is smoothly performed and a high sealing function can be obtained. it can.
In the device having the above configuration, since the degree of dispersion is adjusted according to the type of the mixture and the purpose of dispersion, it is necessary to adjust the gap thickness between the rotor and the stator to change the shearing force to an appropriate level. At that time, even if the gap thickness changes, the lip of the sealing member follows the change in the gap thickness due to its elasticity, and the sealing function can be maintained.

In one aspect of the present invention, the first pressure sensor is provided on the inner surface of the mixture supply port, and the stator is formed with a rotary shaft insertion hole through which the rotary shaft is inserted. The rotor is fixed to a lower end portion of the rotating shaft that protrudes downward from the rotating shaft insertion hole, and the second pressure sensor is provided on the inner surface of the rotating shaft insertion hole. ..
According to this aspect, the mixture supply pressure P1 and the air pressure P2 are detected in the space communicating with the gap between the rotor and the stator.

According to the present invention, it is possible to prevent backflow of the mixture to the rotating shaft side to ensure normal operation, prevent the mixture from drying, and prevent bubbles from being contained in the mixture to prevent deterioration of the quality of the mixture. Can be done.

It is a main part vertical sectional view of the disperser shown as one Embodiment of this invention. It is an enlarged sectional view of the seal member in one Embodiment of this invention. It is a main part vertical sectional view of the disperser shown as another embodiment of this invention. It is an enlarged sectional view of the seal member in the modification of this invention. It is an enlarged sectional view of the seal member in the modification of this invention. It is an enlarged sectional view of the seal member in the modification of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a diagram showing a main part of a disperser according to an embodiment of the present invention.
The dispersion device 1 shown in the figure includes a rotor 2 that is rotationally driven and a stator 3 that is arranged so as to face the upper surface of the rotor 2, and is in the form of a slurry in the gap 4 between the rotor 2 and the stator 3. Alternatively, it is a shear-type disperser that supplies a liquid mixture 5 and disperses the mixture 5 by passing it in the outer peripheral direction of the rotor 2 by centrifugal force.

In the figure, reference numeral 6 is a container for receiving the dispersed mixture 5. The container 6 includes a container main body 7 and an overhanging wall portion 8 provided so as to project outward from the upper part of the container main body 7. A cover unit 9 is arranged above the container 6. The cover unit 9 includes a bearing holding member 10 and a stator holding member 11. The bearing holding member 10 is formed in a tubular shape, has an annular convex portion 12 projecting outward at the lower portion thereof, and the bearing 14 is fixed in the central hole 13 thereof.
The bearing 14 has a flange portion 14a protruding outward at the lower end, and the flange portion 14a is fixed to the bearing holding portion 10 by bolts 15. A rotating shaft 16 for rotationally driving the rotor 2 is rotatably supported on the bearing 14 about an axis in the vertical direction. The rotary shaft 16 is rotationally driven by a motor and a reduction mechanism (not shown).

The stator holding member 11 has a rotating shaft arrangement hole 21 at the center thereof, an engaging recess 22 at the upper portion of the rotating shaft arrangement hole 21, and an annular convex portion 23 protruding outward on the outer periphery of the lower end portion thereof. Have. Further, the stator holding member 11 is formed with a supply passage 24 for supplying the mixture 5 to the gap 4. A bearing holding member 10 is fixed to the stator holding member 11. That is, the lower end portion of the bearing holding member 10 is fitted into the engaging recess 22, and the annular convex portion 12 of the bearing holding member 10 is fixed to the stator holding member 11 by the bolt 25.
In this case, an air introduction space 26 is formed between the lower end surface of the bearing holding member 10 and the bottom surface of the engaging recess 22. Further, a mixture supply pipe 27 is fixed to the stator holding member 11 so as to communicate with the supply passage 24. The mixture 5 is supplied to the mixture supply pipe 27 from a mixing unit supply source (not shown).

The stator 3 is arranged on the lower surface side of the stator holding member 11. The stator 3 is formed in a disk shape, has a rotating shaft insertion hole 31 at the center thereof, and penetrates in the vertical direction at a position separated outward in a certain dimensional radial direction from the rotating shaft insertion hole 31. It has a mixture supply port 32, and further has an annular groove 33 surrounding the rotary shaft insertion hole 31 on the lower surface of the stator 3.
The open end 32a of the mixture supply port 32 is located facing the gap 4 and the upper surface 2a of the rotor 2. The annular groove 33 is located between the opening end 32a and the rotary shaft insertion hole 31. Further, a first recess 34 is formed on the inner surface of the mixture supply port 32, and a second recess 35 is formed on the inner surface of the rotary shaft insertion hole 31.

The stator 3 is held by the stator holding member 11 in a state where the rotating shaft 16 is inserted into the rotating shaft insertion hole 31 and the upper surface thereof is in contact with the lower surface of the stator holding member 11. In this case, the stator 3 includes a first restraint member 36 arranged on the overhanging wall portion 8 of the container 6, a bolt 37 for fixing the restraint member 36 to the annular convex portion 23 of the stator holding member 11, and a first. It is held by the stator holding member 11 by the restraining member 36 and the second restraining member 38 that restrains the overhanging wall portion 8.
The stator 3 held by the stator holding member 11 as described above is in a state of being fixed at a fixed position around the rotating shaft 16. Further, the mixture supply port 32 of the stator 3 is positioned so as to communicate with the supply passage 24 of the stator holding member 11.

In the above configuration, pressurized air is supplied to the air introduction space 26 from an air supply source (not shown). The air introduced into the air introduction space 26 is formed between the outer peripheral surface of the rotary shaft 16 and the inner surface of the rotary shaft arrangement hole 21, and between the outer peripheral surface of the rotary shaft 16 and the inner surface of the rotary shaft insertion hole 31. It is guided from the rotation shaft 16 side to the gap 4 between the rotor 2 and the stator 3 through the minute space 39. The configuration for supplying pressurized air from the rotating shaft 16 side into the gap 4 constitutes the air purge seal mechanism 40.
Further, the mixture 5 is supplied to the mixture supply pipe 27 from a mixture supply source (not shown). The mixture 5 supplied to the mixture supply pipe 27 reaches the mixture supply port 32 through the supply passage 24, and is supplied from the mixture supply port 32 into the gap 4 between the rotor 2 and the stator 3.

A sealing member 41 for sealing the gap 4 between the rotor 2 and the annular groove 33 is provided in the annular groove 33 provided on the lower surface of the stator 3. The seal member 41 is formed of an elastic material such as an elastomer, and is formed in an annular shape so as to be fixed in the annular groove 33. A part of the shape of the seal member 41 extending in an annular shape is shown in FIG.
As shown in FIG. 2, the seal member 41 includes a base portion 42 having a substantially rectangular cross section fixed in the annular groove 33, and a lip 43 extending obliquely downward while expanding the diameter from the base portion 42. The lip 43 is thin so that it can be elastically deformed appropriately, and is formed so that the thickness decreases from the base portion 42 toward the tip portion, and the tip portion elastically contacts the upper surface 2a of the rotor 2.
The position where the seal member 41 is provided in the gap 4 is between the opening end 32a of the mixture supply port 32 and the rotating shaft 16 from the position of the annular groove 33. Thus, the seal member 41 divides the inside of the gap 4 into the outer side in the radial direction and the inner side in the radial direction of the rotor 2.

A first pressure sensor 45 is provided in the first recess 34 of the stator 3, and a second pressure sensor 46 is provided in the second recess 35.
The first pressure sensor 45 detects the supply pressure P1 of the mixture 5 in the gap 4 supplied to the outer side in the radial direction of the rotor 2 with reference to the seal member 41. The second pressure sensor 46 detects the pressure of the air in the gap 4 supplied to the radial inward side of the rotor 2 with reference to the seal member 41. The outputs of the first and second pressure sensors 45 and 46 are sent to the control device 48.
The control device 48 controls the supply amount of the mixture 5 and other parts of the device, and also controls the pressure of the air supplied into the gap 4 based on the outputs of the first and second pressure sensors 45 and 46. Control.

The rotor 2 is formed in a disk shape, has a through hole 51 in the center thereof, and has an engaging recess 52 formed in the upper part of the through hole 51. A plurality of engaging holes 53 are formed on the bottom surface of the engaging recess 52. Further, on the bottom surface of the rotor 2, an annular groove 54 is formed on the outer peripheral portion thereof.
The rotor 2 is fixed to the rotating shaft 16 by fitting the lower end portion of the rotating shaft 16 into the engaging recess 52 so that the upper surface 2a of the rotor 2 faces the lower surface of the stator 3. For fixing, the engaging pin 56 is inserted between the engaging hole 53 and the engaging hole 55 formed on the lower surface of the rotating shaft 16, and the bolt 57 is inserted into the through hole 51 from the lower surface side of the rotor 2. The bolt 57 is screwed into a female screw hole 58 formed on the lower surface of the rotating shaft 16 and tightened.
In the above configuration, the size of the gap between the rotor 2 and the stator 3 can be adjusted by an adjustment mechanism (not shown), and can be adjusted according to the diameter of the particles contained in the mixture after dispersion.

The container 6 includes a side wall portion 61 provided so as to surround the outer peripheral surface of the rotor 2, and a bottom wall portion 62 that closes the lower surface of the side wall portion 61. The space between the outer peripheral surface of the rotor 2 and the side wall portion 61 is a space in which the mixture 5 after the dispersion treatment flows and drops, and an appropriate interval is provided for the flow and drop. At the intersection of the lower end portion of the side wall portion 61 and the outer peripheral edge of the bottom wall portion 62, a discharge mechanism 63 for discharging the dispersed mixture 5 falling from above is provided. The discharge mechanism 63 includes a discharge pipe 64 that discharges the mixture 5 and a suction mechanism 65 that sucks the mixture 5 in the discharge pipe 64 under negative pressure. Although only one discharge pipe 64 and a part of the suction mechanism 65 are shown in FIG. 1, in the disperser 1, a plurality of these components are provided on the outer peripheral portion of the bottom wall portion 62, and the mixture 5 is provided. It may be configured so as to be discharged to the outside of the container 6 from the plurality of the above-mentioned components.

Inside the container 6, a guide member 66 is provided so as to guide the mixture 5 flowing and falling from the gap 4 to the discharge pipe 64. The guide member 66 is a member formed in an annular shape, and is formed so that the distance from the side wall portion 61 can be taken in the same manner as the rotor 2.
An annular convex portion 67 is formed on the upper surface of the guide member 66, and the annular convex portion 67 is located in a groove 54 formed on the lower surface of the rotor 2. With this configuration, the mixture 5 that flows and falls from the gap 4 is smoothly guided to the discharge pipe 64 without flowing to the central portion side of the container 6.
In FIG. 1, reference numeral 68 is a cooling mechanism for cooling the dispersion-treated mixture 5 from the outside of the side wall portion 61.

Next, with respect to the dispersion device 1 configured as described above, the operation when the mixture 5 is dispersed and processed will be described.
When starting the disperser 1, the size of the gap 4 between the rotor 2 and the stator 3, the rotation speed of the rotor 2, the magnitude of the air pressure supplied by the air purge seal mechanism 40, and the amount of the mixture 4 supplied per hour. Etc. are set.
Then, when the control device 48 is operated to start the distribution device 1, a motor (not shown) rotates, the rotation shaft 16 rotates, and the rotor 2 is rotationally driven. When the rotor 2 rotates, the lip 43 of the seal member 41 provided on the stator 3 slides relatively on the upper surface 2a of the rotor 2 while being in contact with the upper surface 2a. Therefore, in the state where the rotor 2 is rotated, the seal member 41 partitions the gap 4 between the outer side in the radial direction and the inner side in the radial direction of the rotor 2 with the seal member 41 as a reference, that is, the direction of the rotation axis 16. ..

On the other hand, the air purge seal mechanism 40 is activated to introduce pressurized air into the air introduction space 26, and this air is introduced to the outer peripheral surface of the rotating shaft 16, the inner surface of the rotating shaft arrangement hole 21 of the bearing holding member 10, and the stator. It is supplied from the rotating shaft 16 side to the gap 4 between the rotor 2 and the stator 3 through the space 39 between the rotating shaft insertion hole 31 and the inner surface of the rotating shaft 3.
Further, the control device 48 supplies the mixture 5 to the mixture supply pipe 27 from a mixture supply source (not shown). The mixture 5 is supplied to the mixture supply port 32 through the supply passage 24, and is supplied from the mixture supply port 32 to the gap 4 between the rotor 2 and the stator 3.

The mixture 5 supplied to the gap 4 is moved outward in the radial direction of the rotor 2 by centrifugal force due to the rotation of the rotor 2, and is dispersed in the narrow gap 4 during this movement. The dispersed mixture 5 collides with the side wall portion 61 of the container 6 from the outer peripheral end of the gap 4, then passes through the space between the outer peripheral surface of the rotor 2 and the side wall portion 61, and further passes through the space between the outer peripheral surface and the side wall portion 61 of the rotor 2, and further, the guide member 66 and the side wall portion 61 It flows into the discharge pipe 64 through the space between the two. The mixture 5 that has flowed into the discharge pipe 64 is discharged to the outside of the container 6 by the suction mechanism 65.

In the above operation, depending on the supply pressure P1 of the mixture 5 supplied into the gap 4, the mixture 5 supplied into the gap 4 from the mixture supply port 32 is moved inward in the radial direction of the rotor 2, that is, in the direction of the rotation axis 16. May move. In this dispersion device 1, since the seal member 41 is provided in the gap 4, even if the mixture 5 in the gap 4 flows back in the direction of the rotation axis 16, the mixture 5 is prevented from moving by the seal member 41. It does not reach the rotating shaft 16 side.
Therefore, the mixture 5 does not flow back to the rotation shaft 16 side and invades the bearing 14 through the space 39, and the function of the bearing 14 can always be ensured to maintain the normal rotation of the rotor 2.

On the other hand, in the dispersion device 1, air is supplied into the gap 4 from the rotation shaft 16 side during operation of the device. At this time, since the air in the gap 4 is blocked by the sealing member 41, it does not enter the region where the mixture 5 is supplied.
Therefore, the air does not come into contact with the mixture 5 and the mixture 5 does not dry. In addition, it is possible to prevent air from being mixed into the mixture 5.

Here, when a difference of a certain value or more occurs between the supply pressure P1 and the air pressure P2 of the mixture 5 in the gap 4, the lip 43 of the seal member 41 is deformed and a gap is generated between both sides of the seal member 41. There is a risk that the backflow of the mixture 5 will occur. However, in the disperser 1, the control device 48 controls the pressures P1 and P2 to be in equilibrium based on the outputs of the first and second pressure sensors 45 and 46. Therefore, the deformation of the lip 43 is prevented and the problem such as the backflow does not occur.
Further, since the gap 4 is physically blocked by the sealing member 41, the air pressure can be increased more than before without considering the drying of the mixture 5 and the mixing of air into the mixture 5, and therefore the sealing effect can be obtained. It is possible to increase the supply amount of the mixture 5 in a high state, and it is possible to increase the productivity of the apparatus.

Further, the seal member 41 in the present embodiment is formed so that the thickness decreases from the base portion 42 toward the tip portion of the lip 43, and the tip portion of the lip 43 elastically contacts the upper surface 2a of the rotor 2. Therefore, in order to adjust the shearing force of the disperser 1, the thickness of the gap 4 between the rotor 2 and the stator 3 is adjusted, and even if the thickness of the gap 4 changes, the lip 43 of the seal member 41 due to its elasticity. The sealing function can be maintained by following the change in the gap thickness.

In the above embodiment, the sealing member is formed of an elastic material and has a base 41 and a lip 43, but the sealing member may be made of another material or composition.
For example, various gland packing configurations can be adopted, and a blade packing in which fiber threads are woven can also be used.

FIG. 3 is a diagram showing another embodiment of the present invention. This embodiment differs from the above embodiment in that the seal member 41 is provided on the rotor 2 side instead of being provided on the stator 3 side as in the above embodiment, and other configurations are described above. It is the same as the form.
That is, in this embodiment, an annular groove 33A centered on the axis of the through hole 51 is formed on the upper surface 2a of the rotor 2, and the base portion 42A of the seal member 41A is fixed to the annular groove 33A. The seal member 41A has the same configuration as the seal member 41 of the above embodiment, and the tip end portion of the lip 43A is in contact with the lower surface of the stator 3. In this embodiment, when the apparatus is activated and the rotor 2 rotates, the seal member 41A slides on the lower surface of the stator 3.
Also in this embodiment, since the seal member 41A partitions the inside of the gap 4, the same actions and effects as those in the above embodiment can be obtained.

4 to 5 are enlarged cross-sectional views of the seal member in the modified example of the present invention.
As shown in FIG. 4, in this modified example, the spacer 42a is provided on the upper portion of the base portion 42. The spacer 42a in this modification has an annular ring shape and is fixed to the bottom of the annular grooves 33 and 33A. The spacer 42a is used to adjust the height of the lip 43 when the thickness of the gap 4 between the rotor 2 and the stator 3 is adjusted. With this spacer 42a, it is possible to follow the thickness of the gap 4 between the rotor 2 and the stator 3 and ensure the sealing effect due to the contact of the lip 43.

The seal member 41b shown in FIG. 5 includes two lips, a lip 43b and a lip 43c, as tip portions. In this modification, the sealing effect can be made more reliable by the two lips, the lips 43b and 43c. The number of lips is not limited to two, and a sealing member having three or more lips may be adopted depending on the properties of the mixture to be treated and various situations of the dispersion treatment.

In the seal member 41e shown in FIG. 6, the seal member 41d is arranged adjacent to the inside of the seal member 41 in the above-described embodiment. In this case, the widths of the annular grooves 33 and 33A are expanded so that both the sealing members 41 and 41d can be fixed. In this modification, a reliable sealing effect can be obtained by duplicating the sealing member. In this modification, the widths of the annular grooves 33 and 33A are expanded so that the two sealing members 41 and 41d are fixed to one groove, but the present invention is not limited to this, and the annular groove is separately provided 2 The seal members 41 and 41d may be configured to be separately fixed to the one annular groove.

1 Disperser 2 Rotor 2a Upper surface of rotor 3 Stator 4 Gap 5 Mixture 14 Bearing 16 Rotating shaft 31 Rotating shaft insertion hole 32 Mixture supply port 32a Opening end 33 Circular groove 39 Space 40 Air purge sealing mechanism 41 Sealing member 42 Base 43 Lip (tip) Department)
45 First pressure sensor 46 Second pressure sensor 48 Control device

Claims (5)

A shear-type disperser that supplies a slurry or liquid mixture and disperses it.
Bearings and
A rotating shaft rotatably supported by the bearing about an axis in the vertical direction,
With a fixed stator,
A rotor arranged so as to face the lower surface of the stator, fixed to the rotating shaft, and rotationally driven by the rotating shaft.
An air purge seal mechanism that supplies air to the gap to which the mixture is supplied between the upper surface of the rotor and the lower surface of the stator through the space outside the rotation shaft.
With
The stator is provided with a mixture supply port so that the open end is located on the upper surface of the rotor.
Between the open end and the rotating shaft in the gap, a sealing member is provided in which a base portion is fixed to either one of the rotor and the stator, and the tip portion elastically contacts the other. , Disperser. With the seal member as a reference, a first pressure sensor that detects the supply pressure P1 of the mixture in the gap supplied to the radial outer side of the rotor and the rotor are supplied to the radial inner side of the rotor. A second pressure sensor that detects the air pressure P2 in the gap, and
A control device that controls the amount of the air pressure P2 or the mixture supplied to the mixture supply port based on the output of the first pressure sensor and the second pressure sensor.
The disperser according to claim 1. The dispersion device according to claim 1 or 2, wherein the sealing member is a member formed of an elastic material and includes a lip extending from the base portion and elastically contacting the other end thereof. An annular groove centered on the axis of the rotating shaft is formed on the lower surface of the stator.
A claim comprising the annular base portion fixed to the annular groove and a lip extending from the base portion to the upper surface of the rotor and abutting the tip portion abutting on the upper surface. Item 3. Dispersing device according to item 3. The first pressure sensor is provided on the inner surface of the mixture supply port.
A rotary shaft insertion hole through which the rotary shaft is inserted is formed in the center of the stator.
The rotor is fixed to the lower end of the rotating shaft protruding downward from the rotating shaft insertion hole.
The disperser according to claim 4, wherein the second pressure sensor is provided on the inner surface of the rotating shaft insertion hole.

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