Coolant circuit for a self-propelled working machine comprising multiple electric drive components
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cooling systems for electric drive components in mobile cranes and self-propelled machines face inefficiencies due to varying cooling capacity requirements, as not all drive components operate at high load simultaneously, leading to unnecessary output reductions and energy waste.
Innovation Solution
A coolant circuit design featuring parallel circuit lines with a coolant pump and heat exchanger, where drive components are strategically arranged based on their cooling needs, with optional connecting lines for cross-supplying coolant to balance thermal loads and maintain uniform pressure loss across lines, utilizing a control device to manage temperature and flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single coolant circuit line is used for all electric drive components, then the cooling system structure is simple, but thermal input becomes uneven and some components cannot be cooled efficiently
Solution Approach 1:
The coolant circuit is divided into multiple parallel circuit lines, with each line serving specific electric drive components. This segmentation allows the thermal load to be distributed more evenly across the cooling system, preventing localized thermal accumulation while maintaining manageable system complexity through modular architecture.
2Temperature
If coolant flow is increased to cool all components simultaneously, then cooling capacity is sufficient, but energy waste occurs when not all components are operating at high load
Solution Approach 1:
The cooling system incorporates dynamic flow control through regulating valves in each circuit line, allowing the coolant distribution to be adjusted based on the actual thermal load of each electric drive component. This enables the system to maintain adequate cooling capacity while adapting flow rates to match operational demands, reducing energy waste during partial-load conditions.
3Reliability
If elaborate cooling mechanisms are used to prevent output reductions, then component protection is ensured, but system complexity and energy consumption increase
Solution Approach 1:
The cooling system is designed to automatically adapt to the thermal needs of electric drive components through the parallel circuit line configuration and regulating valves. Each circuit line self-regulates based on the operational state of its associated components, eliminating the need for complex centralized control mechanisms while ensuring reliable temperature management and component protection.
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 optimizes cooling efficiency by ensuring uniform thermal input, reducing energy waste, and allowing for adaptive management of coolant flow to maintain optimal operating temperatures, thereby preventing output reductions and enhancing machine performance.
Implementation Method 1
a coolant pump (2) for generating a flow of coolant which circulates in the coolant circuit (1)
Implementation Method 2
a heat exchanger (3) for dissipating thermal energy stored in the coolant
Implementation Method 3
at least two circuit lines (4-7) which extend parallel to each other and are embodied to guide the coolant past the drive components (8-13) respectively assigned to them, in order to absorb thermal energy
Data Source
AI summary
A coolant circuit for a self-propelled work machine includes multiple electric drive components, including a coolant pump for generating a flow of coolant which circulates in the coolant circuit, a heat exchanger for dissipating thermal energy stored in the coolant, and at least two circuit lines which extend parallel to each other and are embodied to guide the coolant past the drive components respectively assigned to them, in order to absorb thermal energy. A self-propelled work machine, in particular a mobile crane, includes multiple electric drive components and one or more such coolant circuits.