Impeller Assembly Guide Slots for Stable Viscous Mixing Discharge
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Solution Overview
Problem
Existing mixing devices face issues with unstable discharge, large vibrations, and noise due to pressure fluctuations caused by centrifugal discharge methods, particularly when handling high viscosity solid-liquid mixtures.
Innovation Solution
An impeller assembly with backward-skewed blades and strategically placed baffles and guide slots that reduce kinetic energy loss and stabilize fluid flow, eliminating the need for additional discharge blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple layers of baffles are used to hinder fluid movement, then dispersion effectiveness is improved, but discharge stability deteriorates due to increased pressure fluctuations
Solution Approach 1:
The baffle structure is segmented into multiple layers with guide slots at different positions and orientations. Each layer of baffles is divided into sections by guide slots, allowing fluid to pass through controlled openings while maintaining the overall baffling effect. This segmentation reduces the harmful cumulative effect of multiple solid baffle layers on fluid discharge stability.
Solution Approach 2:
Guide slots act as intermediary elements between the baffles and the discharge fluid. These slots provide controlled pathways that mediate the interaction between the fluid and baffle structures, allowing smooth fluid passage while maintaining the dispersion benefits of the baffles. The guide slots prevent direct harmful interactions between fluid and solid baffle surfaces.
2Productivity
If discharge blades are used to accelerate and discharge fluid, then discharge capability is improved, but vibration and noise increase due to large pressure fluctuations
Solution Approach 1:
The harmful discharge blades that cause large pressure fluctuations and vibration are completely removed from the system. Instead, the patent uses guide slots in baffles to control fluid discharge, extracting the problematic component while maintaining discharge functionality through the baffle slot geometry and positioning.
Solution Approach 2:
The patent converts the potential harm of multiple baffle layers (which could cause pressure fluctuations) into a benefit by incorporating guide slots that control fluid passage smoothly. The guide slots transform the baffles from potential sources of instability into structured flow control elements that maintain stability while providing dispersion.
3Device complexity
If centrifugal discharge method is used, then discharge simplicity is improved, but work efficiency decreases when handling high viscosity solid-liquid mixtures
Solution Approach 1:
The baffle structure has different local qualities - solid sections provide baffling and dispersion, while guide slot sections provide controlled fluid passage. This local differentiation allows the structure to handle high viscosity mixtures effectively by providing both dispersion and smooth discharge pathways in different locations of the same component.
Solution Approach 2:
The patent adds the dimensional aspect of guide slot orientation and positioning to the traditional centrifugal discharge approach. By controlling fluid passage in multiple dimensions through strategically placed guide slots, the system maintains centrifugal discharge simplicity while improving efficiency for viscous mixtures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances fluid work efficiency, stabilizes discharge pressure, and reduces noise and vibrations by ensuring uniform fluid flow and discharge.
Implementation Method 1
a dispersion apparatus using a centrifugal discharge method
Implementation Method 2
the first guide slots and the second guide slots... a kinetic energy loss generated when the fluid passes through the first baffle and the second baffle is reduced by the directions of the first guide slots and the second guide slots
Data Source
AI summary
The present application discloses an impeller assembly and a mixing apparatus, and relates to the technical field of solid and liquid mixing devices. The impeller assembly includes an impeller structure and a housing structure. The impeller structure includes a body, and a surface of the body is provided with a plurality of backward-skewed blades. A blade angle of each backward-skewed blade on any flow plane first decreases progressively and then increases progressively from an inlet to an outlet. A first baffle is disposed on a lower portion of the body. The housing structure includes a second baffle. The first baffle is provided with first guide slots, and the second baffle is provided with second guide slots. A fluid enters from the inlet at an upper portion of the body, flows along the surface of the body, and flows out through the outlet at a lower portion of the body and through the first guide slots and the second guide slots. A centerline of each first guide slot is deflected towards a direction opposite to a rotation direction of the impeller structure, and a centerline of each second guide slot is deflected towards the rotation direction of the impeller structure. The present application solves the problems of unstable discharge, large vibration and noise, and insufficient work efficiency.