Rolling Stock Cooling Section With Pump Pressure Control
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Solution Overview
Problem
Existing cooling systems for flat rolling stock struggle to efficiently perform both power cooling and laminar cooling using a single supply line system, as power cooling requires high line pressure, leading to cavitation issues when attempting to reduce coolant flow for laminar cooling.
Innovation Solution
A control device sets the pump delivery power and line pressure according to the total flow for all spray beams, allowing for adjustable valve openings to prevent cavitation, enabling both power and laminar cooling with a single supply line system by varying the delivery power and line pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If high line pressure is used for power cooling, then cooling intensity is improved, but cavitation occurs when reducing coolant flow for laminar cooling
Solution Approach 1:
The system dynamically adjusts the pump delivery power based on the operating mode (power cooling or laminar cooling). The control device modifies the pump's delivery power in response to valve opening positions, enabling the system to adapt line pressure to the required cooling intensity while preventing cavitation during laminar cooling operations
Solution Approach 2:
The invention changes the physical parameter of pump delivery power to resolve the contradiction. By adjusting the delivery power of the pump according to the total coolant flow requirements and valve positions, the system maintains optimal line pressure for each cooling mode, preventing cavitation while ensuring sufficient cooling intensity
2Device complexity
If a single supply line system is used for both power cooling and laminar cooling, then device complexity is reduced, but control precision deteriorates due to cavitation issues
Solution Approach 1:
The single supply line system is designed to perform multiple functions: both power cooling and laminar cooling operations. The pump and control device are configured to universally serve both cooling modes by dynamically adjusting delivery power, eliminating the need for separate supply line systems while maintaining precise coolant flow control
Solution Approach 2:
The control device monitors the operating conditions and adjusts the pump delivery power based on feedback from valve opening positions and cooling requirements. This feedback mechanism ensures precise coolant flow control in the single supply line system, preventing cavitation while maintaining control precision across different cooling modes
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 solution allows for efficient operation without cavitation during laminar cooling and enables retrofitting of existing power cooling installations by adjusting the control device and pump, ensuring flexible coolant application.
Implementation Method 1
A liquid coolant is fed to the spray beams from a reservoir via a pump and a supply line system
Implementation Method 2
spray beams which apply the liquid coolant, either only from above or both from above and from below, onto the flat rolling stock
Implementation Method 3
A liquid coolant is fed to the spray beams from a reservoir via a pump and a supply line system
Implementation Method 4
the liquid coolant flowing through the respective valve cavitates
Data Source
AI summary
A cooling section for flat rolling stock has a working region, through which the flat rolling stock is guided. The working region can be supplied with a liquid coolant by means of a number of spray beams. The liquid coolant is fed from a reservoir for the liquid coolant to the spray beams by means of a pump and a supply system. Valves are arranged upstream of the spray beams in the supply system. Opening positions of the valves are set by a control unit of the cooling section according to a respective sub-flow that is to be applied to the flat rolling stock by means of each spray beam. Also, the delivery rate of the pump and/or a line pressure generated by the pump in the supply system are set by the control unit according to the total flow that is to be applied to the flat rolling stock by means of all the spray beams.