Mixer Shaft

What is an Agitator?

Jingjin’s independently developed variable cross-section and variable inclination agitator (propeller type) is primarily designed for mixing, decomposing, and reacting materials. This agitator operates mainly in an axial flow direction, resulting in a 50% power savings compared to conventional flat paddle agitators. Jingjin Technology Center utilizes Siemens fluid simulation software to simulate and analyze various paddle shapes, ensuring the selection of the most suitable agitators for different materials.

Dynamic Simulation Analysis

Using Siemens CCM software, Jingjin can conduct dynamic simulation analysis of agitators. This includes three-dimensional flow field and cross-sectional flow field analysis for specialized industries. Such simulations provide a more intuitive visualization of material flow within the reactor, enabling more accurate and rapid determination of optimal solutions. This allows for better selection regarding stirring effect, power, speed, and stirring form for various materials.

What are the key factors to consider when selecting agitator shafts?

When selecting agitator shafts, the following key factors need to be considered to ensure that they are suitable for specific industrial applications:

1. Material selection: The material of the agitator shaft needs to be selected according to the chemical properties of the medium and the working environment. Common materials are stainless steel, carbon steel, alloy steel or special alloys.
2. Dimensions: The diameter and length of the agitator shaft should match the size of the mixing container and the required mixing effect.
3. Mechanical strength: The agitator shaft must have sufficient strength and rigidity to withstand the load and torque during the mixing process.
4. Surface treatment: Depending on the corrosiveness of the medium, special treatment of the agitator shaft surface may be required, such as polishing, coating or plating.
5. Sealing performance: The sealing design of the agitator shaft must prevent medium leakage, especially when handling harmful or precious media.
6. Bearing configuration: Select the appropriate bearing type and configuration to ensure stable operation and low maintenance requirements of the agitator shaft.
7. Drive mode: According to the power requirements and application characteristics of the agitator, select a suitable drive mode, such as direct drive, belt drive or gear reduction drive.
8. Speed ​​requirement: The design of the agitator shaft should meet the required operating speed to achieve the expected mixing effect.
9. Shaft seal type: Choose the appropriate shaft seal type, such as mechanical seal, packing seal or magnetic seal, to meet different application requirements.
10. Connection method: The connection method between the stirring shaft and the drive or agitator, such as key connection, flange connection or threaded connection.
11. Corrosion resistance: For corrosive media, the material and surface treatment of the stirring shaft must have good corrosion resistance.
12. Temperature resistance: The stirring shaft must be able to withstand temperature changes during the process, whether it is a high or low temperature environment.
13. Maintenance and replacement: Consider the maintenance convenience and replacement cost of the stirring shaft.

Classification of Stirring Paddles

1. Three-Blade or Four-Blade Flat Plates: Primarily used for slurry to prevent material precipitation.
2. Six-Blade Disc Paddles: Mainly used to disperse and stir gases in solutions.
3. Variable Cross-Section and Variable Inclination Paddles: Designed for mixing, decomposing, and reacting materials.
4. Frame-Type Stirring Paddles: Suitable for high-viscosity materials to prevent material precipitation.

Comparison of Jingjin’s Mixers with Other Products

1. Material and Construction: Jingjin’s mixer frames are welded and formed using carbon structural steel, offering greater strength compared to traditional cast iron materials.
2. Processing Capability: Jingjin can manufacture stirring shafts up to 13 meters in length, with flange and hub parts processed as a single unit to ensure concentricity. In contrast, some manufacturers produce multi-section shafts due to limited processing capacity, which can result in significant shaft end wobble.
3. Specialized Stirring Shafts: Carbon steel rubber-lined stirring shafts are suitable for strong acid environments. These shafts are lined with 8-10 mm thick vulcanized butyl rubber to isolate the main shaft from strong acids, making them suitable for various materials at temperatures below 90°C.

Application Fields of Agitators

Agitators are applicable in a wide range of industries, including sewage treatment, chemical processing, pharmaceuticals, mining, and metallurgy.