CN201840988U

CN201840988U - Arc-shaped stirring rake tooth for pseudoplastic non-Newtonian fluid

Info

Publication number: CN201840988U
Application number: CN201020283507XU
Authority: CN
Inventors: 汪海波; 王晶
Original assignee: 王仲明
Priority date: 2010-08-06
Filing date: 2010-08-06
Publication date: 2011-05-25
Anticipated expiration: 2020-08-06

Abstract

The utility model relates to an arc-shaped stirring rake tooth for pseudoplastic non-Newtonian fluid, which is applicable to chemical engineering environmental protection equipment occasions used for processing solid-liquid mixed materials, macromolecular sol materials, municipal filthy mud and the like. The arc-shaped stirring rake tooth has the main implementation method that arc-shaped rake teeth are arranged on a main stirring shaft, and when a stirring system is started, the pseudoplastic non-Newtonian material fluid is pushed by an arc-shaped convex edge of the arc-shaped stirring rake teeth, so the fluid is successively stirred along a concave edge, materials gradually enter a fluid state from a pseudoplastic state, the blade moment while starting is reduced, and the load of a speed reduction motor of a stirrer and the load of the stirring shaft are always in a controllable range. Thereby, the service life of the stirrer is prolonged, and the failure rate is greatly reduced.

Description

A kind of arc that is used for pseudoplastic non-Newtonian fluid stirs rake teeth

Technical field:

A kind of arc that is used for pseudoplastic non-Newtonian fluid stirs rake teeth, is applicable to chemical industry environmental protection equipment occasions such as some solid-liquid mixture materials of processing, polymeric sol body material, municipal sludge.

Background technology:

Need handle solid-liquid mixture at some, chemical industry environmental protection equipment occasions such as colloidal sol body material or municipal sludge, because its handled material belongs to pseudoplastic non-Newtonian fluid more, promptly institute's solidliquid mixture material to be processed is not before being stirred shearing, solid material liquid holdup and viscosity are all higher, material be stirred or by high speed shear after, its liquid holdup and viscosity index (VI) all descend, it characterizes the centipoise degree and shows as the decline distribution curve, this situation often appears at some high-viscosity material stir process occasions as some Industrial Wastewater Treatment, the high viscosity biological products, adhesive manufacturing etc. and municipal sludge etc. (agitator is calculated as follows to the power P of liquid output:

P＝Kd5N3ρ

K is the power levels number in the formula, and it is to stir the reynolds number Re j (function of Rej=d2N ρ/μ); D and N are respectively the diameter and the rotating speed of agitator; ρ and μ are respectively the density and the viscosity of mixed liquor).Domestic each enterprise are at this situation is designed the employing helix(ribbon type) agitator more at present, because ribbon is installed comparatively difficulty of processing, and when rotating because the viscous effect of pseudoplastic non-Newtonian fluid, by above agitator as can be known to the power P computing formula of liquid output, because of ribbon and high-viscosity material contact area bigger, make agitator moment when starting very big, to having relatively high expectations of reducing motor and shaft, if this equipment also needs frequent keying like this, reducing motor is easier being out of order when starting, and shortened the service life of equipment.

Summary of the invention:

For overcoming domestic original various chemical industry that are used for, the agitator of environmental protection equipment staring torque when applying to the false fluid of non newtonian is very big, influence equipment life, damage the situation of agitator performance, now propose a kind of arc that is used for pseudoplastic non-Newtonian fluid and stir rake teeth, its main implementation method is such: establish main shaft in the reactor main body, main shaft connects reducing motor, on main shaft, establish arc and stir rake teeth, described stirring rake teeth plane is perpendicular to shaft, described arc stirs rake teeth and main shaft junction, its arc tangent line omits the rolling tangential perpendicular to this place, its two tangential angle should be less than 90 ° greater than 75 °, connect solid between rake teeth and the shaft with bolt, the terminal tangent line of described arc rake teeth should slightly be parallel to mutually close with it reactor inwall tangent line, its angle should be less than 35 ° greater than 0 °, for preventing that paddle from shake occurring and arrogating to oneself phenomenon when stirring, simultaneously also for making stirring more effective, the utility model is provided with the laminar flow plate at arc stirring rake teeth end and tooth middle part, described laminar flow plate is vertical at the arc raker stirrer, laminar flow board plane direction should be in arc raker stirrer running tangent line at an angle, its angle less than 45 ° greater than 0 °.

Because being arc, rake teeth described in the utility model stirs rake teeth, when this stirring system starts, promote pseudoplastic behavior non newtonian material fluid by described arc raker stirrer sector shape flange, fluid is stirred one by one along recessed edge, thereby make the material enter fluid state one by one by the pseudoplastic behavior state, the paddle moment when having reduced to start, the load that makes the reducing motor load of agitator and shaft is all the time in controlled range, thereby prolonged the life-span of this agitator, significantly reduced fault rate.

Description of drawings:

Accompanying drawing 1 is the utility model integral installation structural representation;

Accompanying drawing 2 is that arc described in the utility model stirs rake teeth mounting structure schematic diagram;

Accompanying drawing 3 is single arc raker stirrer toothing front views described in the utility model;

Accompanying drawing 4 is single arc raker stirrer toothing side views described in the utility model;

Wherein: (1) reactor main body, (2) reducing motor, (3) shaft, (4) arc stirs rake teeth, (5) middle part laminar flow plate, (6) terminal laminar flow plate, (7) connect fixing bolt.

The specific embodiment:

As accompanying drawing 1, shown in 2, in reactor main body (1), establish main shaft (3), main shaft (3) connects reducing motor (2), on main shaft (3), establish arc and stir rake teeth (4), described stirring rake teeth (4) plane is perpendicular to shaft (3), the arc tangent line of described arc stirring rake teeth (4) and main shaft (3) junction omits the rolling tangential perpendicular to this junction, its two tangential angle should be less than 90 ° greater than 75 °, arc stirs between rake teeth (4) and the shaft (3) and connects solid with connecting fixing bolt (7), described arc stirs rake teeth (4) arc and extends to reactor (1) inwall, its arcuate end tangent line should slightly be parallel to mutually close with it reactor (1) inwall tangent line, its angle should be less than 35 ° greater than 0 °, for prevent that arc from stirring rake teeth (4) and occurring shaking arrogating to oneself phenomenon when stirring, simultaneously also for making stirring more effective, the utility model stirs rake teeth (4) middle part and end is provided with the terminal laminar flow plate of middle part laminar flow plate (5) (6) respectively at arc, described laminar flow plate (5), (6) be vertical at arc and stir rake teeth (4), laminar flow plate (5), (6) in-plane should stir rake teeth (4) running tangent line at an angle in arc, its angle less than 45 ° greater than 0 °.

Shown in accompanying drawing 3,4, it is arc that described arc stirs rake teeth (4) both sides outer rim, and middle part and end are provided with the terminal laminar flow plate of middle part laminar flow plate (5) (6) respectively, and connects solid with connecting fixing bolt (7) between the shaft (3).

Because being arc, rake teeth described in the utility model stirs rake teeth (4), when this stirring system starts, stir rake teeth (4) curved flanges by described arc and promote pseudoplastic behavior non newtonian material fluid, fluid is stirred one by one along recessed edge, thereby make material enter fluid state one by one by the pseudoplastic behavior state, paddle moment when having reduced to start, thereby the load that makes reducing motor (2) load of agitator and shaft (3) is all the time in controlled range, thereby prolonged the life-span of this agitator, significantly reduced fault rate.

Claims

1. an arc that is used for pseudoplastic non-Newtonian fluid stirs rake teeth, comprise: reactor main body (1), reducing motor (2), shaft (3), arc stirs rake teeth (4), middle part laminar flow plate (5), terminal laminar flow plate (6) connects fixing bolt (7), it is characterized in that: in reactor main body (1), establish main shaft (3), main shaft (3) connects reducing motor (2), establishes arc and stir rake teeth (4) on main shaft (3), and described arc stirs rake teeth (4) plane perpendicular to shaft (3).

2. stir rake teeth according to the described a kind of arc that is used for pseudoplastic non-Newtonian fluid of claim 1, it is characterized in that: the arc tangent line of described arc stirring rake teeth (4) and main shaft (3) junction omits the rolling tangential perpendicular to this junction, its two tangential angle should be less than 90 ° greater than 75 °, described arc stirs rake teeth (4) arc and extends to reactor (1) inwall, its arcuate end tangent line should slightly be parallel to mutually close with it reactor (1) inwall tangent line, and its angle should be less than 35 ° greater than 0 °.

3. stir rake teeth according to the described a kind of arc that is used for pseudoplastic non-Newtonian fluid of claim 1, it is characterized in that: described arc stirs rake teeth (4) middle part and end is provided with the terminal laminar flow plate of middle part laminar flow plate (5) (6) respectively, described laminar flow plate (5), (6) are vertical at arc and stir rake teeth (4), laminar flow plate (5), (6) in-plane should stir rake teeth (4) running tangent line at an angle in arc, its angle less than 45 ° greater than 0 °.

4. stir rake teeth according to the described a kind of arc that is used for pseudoplastic non-Newtonian fluid of claim 1, it is characterized in that: it is arc that described arc stirs rake teeth (4) both sides outer rim.