Integrated Screw-Spindle Coolant Pump Leak Reduction
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Solution Overview
Problem
The complexity of cooling circuits in battery electric vehicles, with numerous branch lines and fluid connections, leads to increased installation effort, risk of leaks, and maintenance challenges due to the need for multiple hose connections and fluid couplings, which are costly and space-intensive.
Innovation Solution
An integrated electric screw spindle coolant pump design that eliminates the need for hose connections and fluid couplings by incorporating a receiving housing with an inlet and return section that opens into a cavity surrounding the spindle housing, using a sealing member to create a seal between the suction and pressure sides, and allowing for a 360° radial arrangement for optimal space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hose connections and fluid couplings are used in cooling circuits, then the system can be assembled with standard components, but the installation effort increases and the risk of leaks rises
Solution Approach 1:
The pump housing is merged with the cooling circuit by integrating the inlet and return connections directly into the pump housing structure. The receiving housing contains an inlet section and a return section that open into a cavity, eliminating the need for separate hose connections and fluid couplings. This integration reduces the number of connection points from multiple external couplings to a unified integrated structure.
2Ease of operation
If multiple hose connections and fluid couplings are used, then the cooling circuit can be assembled, but the installation space required increases
Solution Approach 1:
Multiple connection functions (inlet, return, and pump housing) are merged into a single integrated receiving housing structure. The inlet section and return section are both integrated into the same housing that contains the pump, eliminating the need for separate mounting space for multiple junctions and couplings.
Solution Approach 2:
The inlet section and return section are nested within the receiving housing structure. The cavity inside the receiving housing contains the pump assembly, while the inlet and return passages are integrated into the housing walls, creating a nested configuration that maximizes space utilization.
3Duration of action of stationary object
If numerous pipe branches and fluid connections are used, then the cooling circuit can service multiple components, but the maintenance requirements increase due to aging elastic components
Solution Approach 1:
The pump and cooling circuit are merged into a single integrated assembly with permanent internal passages for coolant flow. This eliminates the need for separate elastic sealing components at connection points, as the integrated structure uses rigid connections with sealing surfaces built into the housing, reducing maintenance requirements associated with aging elastomers.
4Ease of manufacture
If conventional multi-part housing designs are used, then manufacturing is simplified, but the number of sealing interfaces increases
Solution Approach 1:
The receiving housing integrates multiple functions (inlet passage, return passage, pump mounting structure) into a single molded or cast component. This consolidation reduces the number of separate housing parts and their associated sealing interfaces, while the integrated manufacturing process (such as injection molding or die casting) remains efficient for production.
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 operational reliability and service life by reducing noise and maintaining high delivery pressure, while being cost-effective and modular, with a compact installation that minimizes the risk of leaks and simplifies assembly.
Implementation Method 1
a sealing element, which provides a seal between a suction and a pressure side, is arranged on an end face of an axial end of the spindle housing inserted into the cavity
Implementation Method 2
Screw pumps feature a robust, dirt-resistant rotary lobe mechanism that eliminates the need for delicate components such as sliding gates or similar parts
Data Source
Figure 1
AI summary
The invention relates to an electric screw-spindle coolant pump (1) for integration into a temperature-control circuit (50) of an assembly (5) to be temperature-controlled. An accommodating housing (15) comprises a feed line (57) and a return line (56) of the temperature-control circuit (50), which lead into a cavity (11). Part of the cavity (11) surrounds a spindle housing (10) and communicates with an outlet opening (17) in the spindle housing (10) and with the feed line (57). A sealing element (4), which provides a seal between a suction side and a pressure side, is arranged toward an end face of the axial end of the inserted spindle housing (10).