Centrifugal Separator Feed Pipe Spiral Grooves
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Centrifugal separators experience wear and energy loss due to the high velocity and impingement force of the liquid or mixture on the accelerator disc, particularly in high-concentration mineral suspensions and food processes, as the feed units and pipes are stationary while the accelerator disc and bowl rotate, necessitating a more efficient feeding mechanism.
Innovation Solution
The feed pipe is designed with spiral grooves running longitudinally, directing the suspension flow in radial and tangential directions, reducing the need for the accelerator disc to impart tangential acceleration and minimizing mechanical stress on particles or molecules, with groove pitch and depth optimized for optimal speed and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the feed pipe is stationary and directs flow to the center of the rotating accelerator disc, then the structure is simple and easy to manufacture, but the liquid causes wear to the accelerator top due to high velocity and impingement force
Solution Approach 1:
The spiral grooves in the feed pipe pre-accelerate the liquid in the tangential direction before it reaches the accelerator disc. This preliminary action reduces the impingement force on the accelerator top by directing the flow more smoothly onto the rotating surface, thereby reducing wear while maintaining structural simplicity
Solution Approach 2:
The spiral grooves introduce a curved flow path that matches the rotational motion of the accelerator disc. This curvature in the feed path reduces abrupt impingement and distributes the flow more evenly, decreasing localized wear on the accelerator top
2Device complexity
If the feed pipe is stationary while the accelerator disc rotates at high speed, then the feed unit structure is simple, but there is high energy loss due to the need to accelerate the liquid from zero tangential speed
Solution Approach 1:
The spiral grooves perform preliminary tangential acceleration of the liquid within the stationary feed pipe. By the time the liquid exits the pipe onto the rotating accelerator disc, it already possesses tangential velocity, reducing the energy required to accelerate it to the disc's rotational speed and thereby minimizing energy loss
Solution Approach 2:
The spiral grooves change the velocity parameters of the liquid flow by imparting tangential velocity components. This parameter change reduces the delta-v required from the rotating accelerator disc, decreasing the energy consumption of the centrifugal separation process
3Productivity
If the liquid flows out at high velocity to the center of the accelerator disc, then the throughput is high, but the mechanical stress destroys particles or molecules of the feed suspension
Solution Approach 1:
The spiral grooves pre-condition the liquid flow by imparting tangential velocity and reducing turbulence before the liquid reaches the accelerator disc. This preliminary flow conditioning allows for high throughput while minimizing mechanical stress and destruction of particles and molecules in the suspension
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
This design reduces energy consumption and prevents mechanical destruction of particles, ensuring a gentle and efficient separation process with reduced wear and energy loss, while allowing for adaptable configuration based on the properties of the mixture being separated.
Implementation Method 1
the feed pipe has spiral grooves running in longitudinal direction of the pipe. With this design the suspension flow is directed to the accelerator disc with a flow component in radial and in tangential direction
Implementation Method 2
centrifugal separator for separation of a suspension or mixture with a stack of filter discs
Data Source
Figure 1
Figure 2~4
Figure 3
AI summary
The invention relates to a feeding unit for a centrifugal separator (1) for separation of a suspension or mixture with an inlet and a stationary pipe (2), whereby the pipe (2) extends from the top of the centrifugal separator (1) through the stack of filter discs (5) and the opening (9) of the pipe (2) is directed to the accelerator disc (3) of the separator bowl (4) of the centrifugal separator (1). It is mainly characterized in that the feed pipe (2) has spiral grooves (12) running in longitudinal direction of the pipe (2). With such a design the suspension flow is directed in the direction of the rotation of the separator bowl (4) and a soft infeed of the suspension to the accelerator disc (3) and bowl (4) without mechanical destroying of particles or molecules of the suspension or mixture is achieved. The invention is further related to a centrifugal separator (1) using such feeding unit.