Pump Group With Thermally Conductive Resin for Stator Cooling
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Solution Overview
Problem
Existing pump groups for vehicle cooling systems fail to effectively cool the entire electronic control components, particularly the rotor, stator, and command electronics, despite efforts to cool these components using coolant liquid and oil.
Innovation Solution
The pump group incorporates thermally conductive resin to cover critical surfaces, facilitating heat conduction and convection cooling of the stator, rotor, and command electronics, while using coolant liquid to enhance heat exchange and reduce insulation from air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If coolant liquid is used to cool the rotor and stator chambers, then the cooling effectiveness of the motor components is improved, but the cooling of other portions of the pump group remains insufficient
Solution Approach 1:
The pump group is divided into multiple chambers (impeller chamber, rotor chamber, stator chamber, command chamber) with separate cooling pathways. Each chamber can be cooled independently or collectively, allowing targeted cooling of motor components while ensuring comprehensive cooling of the entire pump group through the shared coolant circulation system
Solution Approach 2:
The coolant liquid serves multiple functions simultaneously: it cools the impeller in the impeller chamber, cools the rotor and stator in the motor chambers, and provides thermal management for the command chamber. This multi-functional coolant system resolves the contradiction by achieving comprehensive cooling coverage without requiring separate cooling systems for each component
2Temperature
If oil is provided in the stator chamber for cooling by convection, then the stator cooling is improved, but the cooling of other portions remains insufficient
Solution Approach 1:
Different cooling media are used in different chambers based on local requirements: coolant liquid is used in the impeller chamber and motor chambers where high heat dissipation is needed, while oil is used in the stator chamber for convective cooling. This localized approach allows each chamber to be optimized for its specific thermal management needs while contributing to overall system cooling
3Temperature
If thermally conductive resin is used to cover critical surfaces, then heat conduction and convection cooling is improved, but the device complexity increases
Solution Approach 1:
Thermally conductive resin is applied to cover critical surfaces where heat generation occurs. This composite material approach enhances heat conduction from hot spots to the coolant-contacting surfaces, improving overall thermal management effectiveness without requiring complex active cooling mechanisms for each component
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 solution provides comprehensive cooling of electronic components, ensuring uniform temperature, increased power density, and compact design without increasing dimensions, while damping vibrations and improving thermal management.
Implementation Method 1
thermally conductive resin to cover critical surfaces, facilitating heat conduction and convection cooling
Implementation Method 2
facilitating heat conduction and convection cooling of the stator, rotor, and command electronics, while using coolant liquid to enhance heat exchange
Implementation Method 3
damping vibrations and improving thermal management
Data Source
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AI summary
The invention is a pump group (1) fluidically connectable to a cooling system for an operating group, such as, for example, an internal combustion engine, an electric motor or a battery group of a vehicle. The pump group (1) comprises an impeller (2) and a shaft (3) on which the impeller (2) is integrally mounted. The pump group (1) has at least one drive of the electric type, in fact comprising an electric motor (4) comprising a rotor (41) integrally mounted on the shaft (3) and a stator (42). Furthermore, the pump group (1) comprises a pump body (6) comprising: - a first casing (61) which houses the impeller (2) in an impeller chamber (610); - a second casing (62) in which the electric motor (4) is housed in a motor chamber (620), wherein the second casing (62) comprises an intermediate tubular wall (625) positioned between the rotor (41) and the stator (42) so that a rotor chamber (621) and a stator chamber (622) are defined in the motor chamber (620), mutually tightly separated; Specifically, the first casing (61) and the second casing (62) are separated by a first separation wall (624) comprising an impeller surface (628) facing into the impeller chamber (610) and a motor surface (629) facing into the motor chamber (620). Even more specifically, the pump group (1) comprises a thermally conductive resin that at least partially covers the motor surface (629), to cool the stator chamber (622) by conduction.