Stirrer

Patent metadata

Field	Value
Publication number	US-11241661-B2
Application number	US-201917255638-A
Country	US
Kind code	B2
Filing date	May 27, 2019
Priority date	Apr 15, 2019
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

A stirrer is provided such that a fluid being processed can be more efficiently shown by way of the action of an intermittent jet flow and processing capacity can be improved. The stirrer concentrically includes a rotor that includes a plurality of flat vanes and that rotates, and a screen that is place around the rotor. The screen includes a plurality of slits in the circumferential direction thereof, and screen members that are positioned between adjacent slits. The fluid being processed is discharged by rotation of the rotor from the inside of the screen to the outside as an intermittent jet flow through the slits. The width of the distal working face on the distal end of the vane in the rotational direction is smaller than the width of the basal end of the vane in the rotational direction.

First claim

The invention claimed is:

1. A stirrer, comprising:
a rotor having a plurality of plate-like blades and rotating, a partition wall for holding a discharge pressure of the rotor, and a screen laid around the rotor, all of which are provided concentrically,
wherein the screen includes a plurality of slits in a circumferential direction and a screen member located between the adjacent slits,
wherein in the stirrer, in which by rotating at least the rotor of the rotor and the screen, a fluid to be processed is discharged as an intermittent jet flow from the inside of the screen to the outside through the slits, and
wherein a width of a front-end action surface in a front-end part of the blade in the rotation direction is narrower than a width of a base-end part of the blade in the rotation direction.

2. The stirrer according to claim 1 , wherein the screen has a cylindrical shape having a circular cross-section,
wherein an opening of the plurality of the slits provided on an inner wall surface of the screen is made to serve as an inflow opening, and
wherein the width of the front-end action surface in the front-end part of the blade in the rotation direction is wider than a width of the inflow opening in the circumferential direction.

3. The stirrer according to claim 2 , wherein the front-end part of the blade is defined by the front-end action surface and a flank surface,
wherein the front-end action surface is a surface which is provided on the very front-end of the blade such that the distance between the front-end action surface and the inner wall surface of the screen is kept minute, and
wherein the flank surface is a surface which is located behind the front-end action surface in the rotation direction of the blade and is provided such that the distance between the flank surface and the inner wall surface of the screen is larger than the minute distance.

4. The stirrer according to claim 3 , wherein the number of the plurality of the plate-like blades is 3 or more and 12 or less.

5. The stirrer according to claim 2 , wherein the plurality of the plate-like blades has the same width in the rotation direction in the front-end action surface and are formed at the equal distance in the rotation direction.

6. The stirrer according to claim 3 , wherein the plurality of the plate-like blades has the same width in the rotation direction in the front-end action surface and are formed at the equal distance in the rotation direction.

7. The stirrer according to claim 2 , wherein the number of the plurality of the plate-like blades is 3 or more and 12 or less.

8. The stirrer according to claim 2 , wherein diameters of the blade and the screen become smaller in the axial direction.

9. The stirrer according to claim 3 , wherein diameters of the blade and the screen become smaller in the axial direction.

10. The stirrer according to claim 1 , wherein the blade has the front-end action surface, a front surface which is located in a front of the front-end action surface of the blade in the rotation direction, and a back surface which is located behind the front-end action surface of the blade in the rotation direction, and
wherein the front surface and the back surface are slope-like tapered surfaces which gradually become smaller as the width between the front surface and the back surface move toward the front-end in the part more than half from the front-end side of the blade.

11. The stirrer according to claim 10 , wherein the number of the plurality of the plate-like blades is 3 or more and 12 or less.

12. The stirrer according to claim 10 , wherein diameters of the blade and the screen become smaller in the axial direction.

13. The stirrer according to claim 10 , wherein the plurality of the plate-like blades has the same width in the rotation direction in the front-end action surface and are formed at the equal distance in the rotation direction.

14. The stirrer according to claim 1 , wherein the number of the plurality of the plate-like blades is 3 or more and 12 or less.

15. The stirrer according to claim 14 , wherein diameters of the blade and the screen become smaller in the axial direction.

16. The stirrer according to claim 1 , wherein diameters of the blade and the screen become smaller in the axial direction.

17. The stirrer according to claim 1 , wherein the plurality of the plate-like blades has the same width in the rotation direction in the front-end action surface and are formed at the equal distance in the rotation direction.

18. The stirrer according to claim 1 , wherein the plurality of the slits has the same width in the circumferential direction and are formed at equal intervals in the circumferential direction, and
wherein the screen does not to rotate.

19. The stirrer according to claim 1 , wherein the plurality of the slits has the same width in the circumferential direction and are formed at equal interval in the circumferential direction, and
wherein the screen rotates in opposite direction of the rotor.

20. A stirrer, comprising:
a rotor having a plurality of plate-like blades and rotating, and a screen laid around the rotor, all of which are provided concentrically,
wherein the screen includes a plurality of slits in a circumferential direction and a screen member located between the adjacent slits,
wherein in the stirrer, in which by rotating at least the rotor of the rotor and the screen, a fluid to be processed is discharged as an intermittent jet flow from the inside of the screen to the outside through the slit,
wherein the plurality of the plate-like blades rotationally moves by the rotation of the rotor,
wherein on the front surface side of the blade in the rotation direction, by increasing a pressure of the fluid to be processed, the fluid to be processed is discharged as an intermittent jet flow from the slit located in the front surface side of the blade,
wherein on the back surface side of the blade, by decreasing the pressure of the fluid to be processed, the fluid to be processed is sucked from the slit located in the back surface side of the blade,
wherein the front-end part of the blade is defined by the front-end action surface and a flank surface,
wherein the front-end action surface is a surface which is provided on the very front-end of the blade such that the distance between the front-end action surface and the inner wall surface of the screen is kept minute distance,
wherein the flank surface is a surface which is located behind the front-end action surface in the rotation direction of the blade and is provided such that the distance between the flank surface and the inner wall surface of the screen is larger than the minute distance, and
wherein the blade is configured so as to be fester a suction velocity of the fluid to be processed by being provided with the flank surface on the front-end part as compared with the case that the flank surface is not provided on the front-end part.

Assignees

• M Technique Co Ltd

Inventors

• Enomura Masakazu

Classifications

• B01F27/84

  with two or more stirrers rotating at different speeds or in opposite directions about the same axis · CPC title

• B01F27/2711

  provided with intermeshing elements · CPC title

• B01F25/4511

  with a rotor surrounded by a stator provided with orifices · CPC title

• B01F25/105

  Mixing heads, i.e. compact mixing units or modules, using mixing valves for feeding and mixing at least two components · CPC title

• B01F27/1921

  comprising helical elements and paddles · CPC title