Motor Housing Radiator Integration for Compact Pump Cooling
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Solution Overview
Problem
Fluid pressure equipment requires downsizing to improve maintenance characteristics, with existing designs separating the radiator from the fluid pressure pump and relying on external cooling fans, which complicates cooling and increases size and weight.
Innovation Solution
A fluid pressure pump unit design where the motor, cooling fan, and radiator are partially overlapped, with a communication passage within the motor connecting the pump and radiator passages, allowing shared cooling air to efficiently cool both components, reducing equipment size and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radiator is disposed separately from the fluid pressure pump with external cooling fan, then the cooling function is reliable, but the equipment size and weight increase
Solution Approach 1:
The patent merges the radiator with the motor housing, integrating two previously separate components (radiator and motor) into a single unified structure. The radiator is positioned within the motor housing space, eliminating the need for separate radiator mounting and external plumbing, thereby reducing overall equipment weight while maintaining cooling reliability.
Solution Approach 2:
The motor housing is designed to serve multiple functions: it houses the motor components and simultaneously functions as the radiator structure for cooling the hydraulic fluid. This multi-functional design eliminates redundant components and reduces equipment weight by making the motor housing perform both structural and thermal management roles.
2Reliability
If the radiator is disposed separately from the fluid pressure pump, then the cooling function is reliable, but the device complexity increases due to external plumbing
Solution Approach 1:
The patent combines the radiator structure with the motor housing, eliminating the need for separate external plumbing connections between the pump and radiator. The hydraulic fluid passages are integrated directly into the motor housing structure, simplifying the overall fluid delivery system and reducing device complexity.
3Weight of stationary object
If the motor and radiator are overlapped with the cooling fan, then the equipment size is reduced, but the cooling efficiency may be compromised
Solution Approach 1:
The patent utilizes the radial dimension by positioning the radiator around the motor housing in a circumferential arrangement, allowing the cooling fan to generate airflow that passes through the radiator fins from the radial direction. This three-dimensional spatial arrangement enables compact integration while maintaining effective cooling surface area exposure to the airflow.
Solution Approach 2:
The radiator is positioned specifically in the region where cooling airflow is most effective, with the cooling fan located to generate airflow that directly passes through the radiator fins. The motor housing is designed with optimal thermal conductivity and surface area characteristics in the regions exposed to cooling airflow, ensuring efficient heat dissipation despite the compact integrated arrangement.
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 enhances cooling efficiency, prioritizes radiator cooling, reduces equipment size and weight, and simplifies maintenance by integrating cooling functions within the motor housing, eliminating the need for external cooling devices.
Implementation Method 1
a cooling fan which is connected to the output shaft of the motor and generates a flow of cooling air to cool the motor
Implementation Method 2
a radiator which receives heat from the hydraulic fluid
Implementation Method 3
heat is transferred from the hydraulic fluid flowing in the communication passage to the housing of the motor, thereby contributing to cooling of the hydraulic fluid
Data Source
AI summary
The present invention provides a technology for downsizing fluid pressure equipment including a fluid pressure pump and a radiator. The hydraulic pump unit 3 includes: a hydraulic pump 4; a motor 5 which drives the hydraulic pump 4; a cooling fan 7 which is connected to an output shaft 5a of the motor 5 and generates a flow of cooling air 6 to cool the motor 5; and a radiator 8 which receives heat from the hydraulic oil. The motor 5 and the radiator 8 are overlapped with the cooling fan 7, when viewed from the axial direction of the output shaft 5a of the motor 5.