Modular Motor Pump Unit Heat Exchanger Integration
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Solution Overview
Problem
Existing modular motor pump units face challenges in effectively cooling returning hydraulic fluid, leading to overheating issues that reduce seal lifespan and system efficiency, and existing active cooling systems complicate the modular design.
Innovation Solution
Incorporating an additional housing with a heat exchanger element between the outer housing and a housing cover, allowing for flexible placement and integration of either liquid or air cooling systems, which directs heated hydraulic fluid through the heat exchanger before it enters the reservoir, preventing direct suction and foaming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an active cooling system is integrated into the motor pump unit, then the cooling effectiveness is improved, but the device complexity increases
Solution Approach 1:
The cooling system is merged with the hydraulic fluid reservoir by integrating the heat exchanger element directly into the reservoir structure. The heat exchanger utilizes the reservoir's wall structure, allowing cooling functionality to be combined with the existing reservoir design rather than adding a separate complex cooling system.
Solution Approach 2:
The heat exchanger element is designed to serve multiple functions: it provides active cooling for the hydraulic fluid while simultaneously utilizing the reservoir's existing structure. The heat exchanger can be integrated into different wall configurations of the reservoir, making it a multi-functional component that serves both structural and thermal management purposes.
2Device complexity
If the heat exchanger is integrated into the reservoir wall, then the device complexity is reduced, but the cooling surface area is limited
Solution Approach 1:
The heat exchanger extends in the longitudinal direction of the reservoir, utilizing the length dimension of the reservoir structure. By stretching the heat exchanger along the longitudinal axis, the cooling surface area is increased without adding complexity in other dimensions, effectively using the reservoir's dimensional space for thermal management.
3Ease of manufacture
If modular design is implemented for the motor pump unit, then the ease of manufacture is improved, but the integration of cooling systems becomes more difficult
Solution Approach 1:
The cooling system is segmented into a modular heat exchanger element that can be independently manufactured and then integrated with the reservoir. The heat exchanger is designed as a separate component that can be attached to different reservoir configurations, allowing modular assembly while maintaining cooling functionality.
Solution Approach 2:
The heat exchanger is designed with universal mounting capabilities that allow it to be integrated with different reservoir types and configurations. The same heat exchanger component can be adapted to various modular reservoir designs, maintaining ease of manufacture while enabling cooling system integration across different product variants.
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 enables flexible and efficient cooling of hydraulic fluid, preventing overheating and foaming, thereby extending seal life and improving hydraulic system efficiency while simplifying the modular design and assembly of the motor pump unit.
Implementation Method 1
A heat exchanger element (11) is arranged in the additional housing (10) and the return channel (9) is connected to the additional housing (10)
Data Source
AI summary
The present disclosure refers to a modular motor pump unit having an outer housing with two open ends, two housing covers attachable to the open ends, at least one electric motor arranged in the outer housing, at least one pump element arranged in the outer housing and drivable by the electric motor, and at least one connection portion arranged externally on the outer housing. The outer housing forms a hydraulic fluid reservoir, a pressure channel extending from the pump element to the connection portion. A return channel extends from the connection portion to the inside of the outer housing. An additional housing is provided between the outer housing and at least one housing cover. A heat exchanger element is arranged in the additional housing and the return channel is connected to the additional housing and the additional housing is connected to the hydraulic fluid reservoir.