Rotary Separator Post-Shutdown Spin for Icing Prevention
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Solution Overview
Problem
Rotary separators in internal combustion engines are prone to icing in cold conditions, leading to performance impairment due to ice buildup, which can block gas flow and prevent proper operation when the engine is restarted.
Innovation Solution
Implementing a solo start mechanism for the rotary separator after the engine is switched off, where the rotor is accelerated to a speed that removes ice and condensate, and potentially using electric or hydraulic drive to maintain heat and prevent freezing, with control based on time or temperature signals to ensure effective condensate removal before icing occurs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the rotary separator operates in cold conditions without additional heating or rotation, then energy consumption is reduced, but ice buildup occurs on the separator surfaces
Solution Approach 1:
The rotary separator performs a preliminary rotation phase after engine shutdown to remove condensate before ice formation occurs. This preliminary action prevents the harmful effect of icing while the separator is still warm enough to keep condensate in liquid form, thereby maintaining reliability without continuous energy consumption.
Solution Approach 2:
Instead of continuous operation, the rotary separator uses periodic rotation phases - specifically rotating for a defined period after engine shutdown and then remaining stationary. This periodic action pattern reduces energy consumption while still achieving the necessary condensate removal to prevent icing.
2Reliability
If the rotary separator continues rotating after engine shutdown, then condensate is removed effectively, but rotor imbalance and bearing damage occur due to ice accumulation
Solution Approach 1:
The system performs condensate removal as a preliminary action immediately after engine shutdown when temperatures are still above freezing. By completing the removal process before the separator cools down to freezing temperatures, the system prevents ice accumulation that would cause rotor imbalance and bearing damage during extended rotation.
Solution Approach 2:
The rotary separator rapidly completes the condensate removal process within a limited time window after engine shutdown, before ice formation begins. This rushing through the critical phase allows effective condensate removal while avoiding the harmful effects of ice accumulation on the rotating components.
3Reliability
If the rotary separator rotates at high speed to remove ice, then cleaning effectiveness increases, but mechanical stress on bearings and rotor increases
Solution Approach 1:
The system performs ice prevention as a preliminary action during the warm period after engine shutdown, when condensate is still liquid. By removing condensate before it freezes, the system eliminates the need for subsequent high-speed rotation to remove ice, thereby protecting bearings and rotor from excessive mechanical stress.
Solution Approach 2:
Instead of using excessive rotation speed to remove ice after formation, the system applies a moderate rotation speed during the critical post-shutdown period when condensate removal is most effective. This partial action approach achieves sufficient cleaning without subjecting mechanical components to excessive stress.
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 method effectively prevents ice buildup and ensures the rotary separator remains functional by removing condensate and ice, maintaining gas flow and preventing rotor imbalance, thus ensuring reliable engine startup and performance.
Implementation Method 1
the rotor is accelerated to a speed that ensures that particles deposited on the rotor are thrown off the rotor
Implementation Method 2
potentially using electric or hydraulic drive to maintain heat and prevent freezing
Data Source
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AI summary
The invention relates to a method for operating a rotation separator (1), wherein a gas flow, which is laden with solid and/or liquid particles and originates from an internal combustion engine, is fed to a rotationally driven element labeled as a rotor (3), in which method particles are separated from the gas flow and deposited onto the rotor (3), wherein the rotor (3) is operated at a rotational speed labeled as an effective rotational speed in such a way that the particles deposited on the rotor (3) are spun off from the rotor (3) as a result of the rotational motion of the rotor (3). According to the invention, after the internal combustion engine has been shut off, the rotor (3) is set into rotation at the effective rotational speed by means of a so-called separate start (A) while the internal combustion engine is at a standstill. The invention further relates to a rotation separator (1) that is controlled by a control system in such a way that the rotation separator is operated in accordance with said method.