Hydraulic Pump Cooling Jacket for Injection Molding
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Solution Overview
Problem
Existing hydraulic devices for injection molding machines face inefficiencies in energy usage due to continuous operation of the pump for cooling, even when no oil flows, leading to unnecessary energy consumption.
Innovation Solution
The hydraulic device integrates a temperature-controlled hydraulic pump and cooling system, where the hydraulic line and cooling line are routed through the servo motor, utilizing a cooling jacket and potentially the hydraulic medium as a coolant to efficiently cool the drive system directly at the point of heat generation, and includes temperature-controlled components like the control device for the servo motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the hydraulic pump operates continuously to cool the system, then the cooling function is maintained, but energy consumption increases unnecessarily
Solution Approach 1:
The hydraulic pump cools itself by utilizing its own housing as a cooling jacket through which cooling medium flows. The pump housing serves dual functions: hydraulic pressure generation and self-cooling, eliminating the need for separate cooling systems and reducing energy waste during idle periods
Solution Approach 2:
The pump housing is designed to serve multiple functions simultaneously: containing hydraulic components, providing structural support, and acting as a cooling jacket. This multi-functionality reduces the number of separate components needed and allows the pump to maintain cooling capability without continuous operation
2Temperature
If the pump and servomotor are cooled separately, then cooling effectiveness is maintained, but device complexity increases
Solution Approach 1:
The cooling systems for the hydraulic pump and servomotor are merged into a single integrated cooling circuit. The cooling medium flows through both the pump housing (acting as cooling jacket) and the servomotor, consolidating multiple cooling functions into one unified system that reduces complexity while maintaining effective cooling of all components
3Temperature
If bypass solutions are used to maintain minimum oil flow for cooling, then cooling is maintained, but energy is wasted as the pump continues to work
Solution Approach 1:
The system uses the hydraulic pump's own housing as a cooling jacket that can be cooled independently of the pump's operational state. Cooling medium flows directly through the pump housing to remove heat from the motor and hydraulic components, allowing effective cooling even when the pump is not actively pumping hydraulic fluid
Solution Approach 2:
A separate cooling medium (such as water) is introduced as an intermediary to cool the pump housing and servomotor. This cooling medium flows through dedicated cooling channels in the pump housing and servomotor, providing thermal management without requiring the hydraulic pump to maintain continuous operation
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 configuration enables efficient energy optimization by directly cooling the hydraulic pump and associated components, reducing energy waste and allowing for compact integration, while maintaining pressure requirements without continuous oil flow.
Implementation Method 1
the hydraulic pump is temperature-controlled and the hydraulic line and/or the cooling line are routed through or to the servo motor. Cooling is then provided by a cooling jacket.
Implementation Method 2
efficient temperature control is possible directly at the point at which the heat is generated
Implementation Method 3
the hydraulic line and cooling line are routed through the servo motor, utilizing a cooling jacket and potentially the hydraulic medium as a coolant to efficiently cool the drive system directly at the point of heat generation
Data Source
Figure 1
Figure 2
AI summary
For a hydraulic device for supplying at least one load (30) with hydraulic medium on an injection molding machine for processing plastics, a temperature-control device for the temperature control of the hydraulic medium by means of a temperature-control medium is provided, said temperature-control device having a cooling line (15). The hydraulic medium is pumped to the load through at least one hydraulic line (12, 13) by means of a hydraulic pump (10), which can be temperature-controlled by the temperature-controlled hydraulic medium or by the temperature-control medium. A servomotor (20) for the hydraulic pump (10) is connected to the hydraulic pump (10). The hydraulic line (12') containing the temperature-controlled hydraulic medium and/or the cooling line (15) containing the temperature-control medium is led to said servomotor. Because the hydraulic line (12) and/or the cooling line (15) forms a cooling jacket for the hydraulic pump (10), favorable energy optimization is created for the temperature control of the hydraulic device.