Generator Cooling via Hydraulic Oil System
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Solution Overview
Problem
Existing construction machines with electric generators face challenges in cooling due to limited cooling capacity and spatial constraints, as well as the risk of electrical conduction from water-based cooling systems, and the integration of hydraulic pump assemblies is cumbersome.
Innovation Solution
A construction machine with an electric generator utilizing a hydraulic oil system for cooling, featuring a pipe system with high thermal conductivity materials and a shared oil tank, along with a regulating device and monitoring system, to efficiently manage heat and reduce spatial requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air cooling with a fan is used for the generator, then the cooling system is simple in structure, but the cooling capacity is limited and occupies constructed space
Solution Approach 1:
The patent applies hydraulic cooling by integrating the generator into the hydraulic oil system. The hydraulic oil circulates through cooling channels in the generator stator, providing efficient heat removal. This hydraulic approach replaces the limited air cooling with high-capacity liquid cooling, solving the contradiction between simple structure and adequate cooling capacity.
2Temperature
If water-based cooling system is used for the generator, then the cooling capacity is high, but electrical conduction risk occurs due to electrical conductivity of water
Solution Approach 1:
The patent changes the physical-chemical parameters of the cooling fluid from conductive water to non-conductive hydraulic oil. This parameter change maintains high cooling capacity through liquid circulation while eliminating electrical conduction risks, thus resolving the contradiction between cooling efficiency and electrical safety.
3Temperature
If a separate cooling system is provided for the generator, then the cooling function is dedicated and effective, but the device complexity and spatial requirements increase
Solution Approach 1:
The patent merges the generator cooling function with the existing hydraulic oil system. The hydraulic oil serves dual purposes: hydraulic operations and generator cooling. The generator is integrated into the hydraulic system with cooling channels that receive hydraulic oil, eliminating the need for a separate cooling system and reducing overall device complexity while maintaining effective cooling.
4Area of stationary object
If the generator and hydraulic pump assembly form a common construction unit, then spatial arrangement is simplified, but separation of components becomes difficult
Solution Approach 1:
The patent segments the generator into a separate module that can be independently removed from the hydraulic pump assembly. The generator is mounted on a support structure that allows it to be detached from the hydraulic system, enabling easy separation while maintaining compact spatial arrangement when assembled. This segmentation resolves the contradiction between compact integration and component separability.
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 hydraulic oil system provides effective cooling with a higher boiling point than water, reduces the need for separate cooling systems, and prevents electrical interference, allowing for a more compact and efficient operation of the generator.
Implementation Method 1
the hydraulic oil system is provided for cooling the generator
Implementation Method 2
the hydraulic oil system is provided independently of the electric generator in the construction machine and performs further functions within the construction machine
Implementation Method 3
the pipe system is manufactured from a material with good thermal conductivity, preferably steel, stainless steel, aluminium or copper
Data Source
AI summary
The invention relates to a construction machine such as a road paver with an electric generator. The construction machine comprises a hydraulic oil system for hydraulic functions that also cools the generator.