Modular Cooling for Surface-Cooled Linear Actuators
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing linear actuator systems face challenges in efficiently dissipating heat generated during high-speed and high-repetition applications, particularly in lightweight and automated manufacturing environments, where heat management is critical for maintaining performance and longevity.
Innovation Solution
A lightweight, integrated motor linear actuator system with modular cooling capabilities, featuring a cylindrical actuator housing and a rotor supported by a single bearing, allowing for the addition or removal of modular cooling assemblies that can be thermally coupled to the actuator housing to dissipate heat effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional linear actuator systems are used in high-speed, high-repetition applications, then productivity is improved, but heat generation increases causing performance degradation
Solution Approach 1:
The cooling system is divided into modular cooling assemblies that can be selectively coupled to different portions of the actuator housing. Each cooling assembly independently manages heat from specific high-heat-generation zones, allowing targeted thermal management without cooling the entire actuator, thus maintaining productivity while controlling temperature.
Solution Approach 2:
Cooling fluid acts as an intermediary medium that absorbs heat from the actuator housing through thermal contact. The fluid circulates through channels in the modular cooling assemblies, transferring heat away from critical components, enabling sustained high-speed operation without temperature-related performance degradation.
2Device complexity
If integrated motor actuators are used to reduce size and weight, then device complexity is reduced, but heat dissipation becomes more challenging
Solution Approach 1:
The integrated actuator housing is segmented into zones with different thermal characteristics. Modular cooling assemblies are selectively attached to high-heat-generation zones (motor, gear train) rather than the entire housing, providing targeted cooling to critical components while maintaining the benefits of integration and reduced complexity.
Solution Approach 2:
Different portions of the actuator housing receive different levels of cooling based on their thermal requirements. The modular cooling assemblies provide enhanced cooling to high-heat areas (motor and gear train) while other areas rely on natural convection or passive cooling, optimizing heat dissipation efficiency without adding unnecessary complexity.
3Temperature
If modular cooling assemblies are added to manage heat, then temperature control is improved, but device complexity increases
Solution Approach 1:
The cooling system is designed to be dynamically configurable rather than fixed. Modular cooling assemblies can be selectively coupled and decoupled from the actuator housing based on operational requirements, allowing the system to adapt its cooling capacity to match the actual heat generation levels during different operating conditions.
Solution Approach 2:
The modular cooling assemblies serve multiple functions: they provide thermal management for the actuator, can be selectively deployed based on application requirements, and can potentially be reused across different actuator units. This multi-functionality reduces overall system complexity by using standardized components rather than custom-integrated cooling solutions.
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 system effectively manages heat generation by reducing weight and complexity while maintaining motor capacity, enabling higher speeds and precision in automated manufacturing tasks.
Implementation Method 1
A cooling module can be selectively coupled to the exterior of the actuator housing, engaged in thermal contact and configured to dissipate heat generated by operation of the electric motor and other actuator system components
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An actuator system includes a housing with a screw shaft extending along a longitudinal axis. The stator component of an electric motor is coupled to the housing, with a rotor extending along the longitudinal axis. A thrust tube is engaged with the screw shaft, for example with a nut assembly configured to convert rotational motion of the rotor into linear motion of the thrust tube. A modular cooling assembly is selectively coupled to the exterior surface of the actuator housing, and configured to dissipate heat.