Urea Pump Bubble Elimination via Magnetic Coupling and U-Shaped Flow
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Solution Overview
Problem
Existing engine exhaust gas treatment systems experience reduced pumping efficiency and metering accuracy due to bubble formation in the urea solution, affecting the performance of the urea pump.
Innovation Solution
A fluid conveying device with a magnetic coupling and U-shaped flow passage, combined with a gear mechanism and monitoring modules, is designed to eliminate bubbles and improve liquid pumping efficiency and metering control accuracy. The device includes a pump with a motor at the bottom and a pump head at the top, connected by a magnetic coupling, and features inlet and outlet pipelines forming an inverted U shape, along with monitoring modules for pressure and temperature sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional urea pump is used in the exhaust gas treatment system, then the system can pump urea solution, but bubbles are produced in the pipeline which reduces pumping efficiency and metering accuracy
Solution Approach 1:
The patent utilizes the harmful bubbles as a diagnostic indicator by installing a transparency detection device that measures the light transmission through the pump head. When bubbles are detected (reduced transparency), the system can trigger alerts or adjustments, converting the harmful presence of bubbles into a useful monitoring signal that improves overall system reliability and metering accuracy.
Solution Approach 2:
The patent replaces traditional mechanical bubble removal methods with an optical detection system. Instead of using mechanical separators or filters to remove bubbles, the system uses a transparency detection device with light sources and sensors to detect bubble presence, thereby improving pumping efficiency and metering accuracy through non-mechanical means.
2Device complexity
If the pump structure is simplified, then the device complexity is reduced, but the ability to eliminate bubbles and maintain metering accuracy is compromised
Solution Approach 1:
The patent combines the transparency detection device with the existing pump structure, integrating the light sources, sensors, and control systems into the pump head assembly. This merging approach allows bubble detection and metering accuracy maintenance without adding significant external complexity to the overall pump structure.
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 effectively eliminates bubbles in the urea solution, enhancing the pumping efficiency and metering accuracy of the urea pump, ensuring reliable operation in engine exhaust gas treatment systems.
Implementation Method 1
a magnetic coupling part positioned between said motor and said pump head
Implementation Method 2
a U-shaped flow passage and a gear mechanism positioned at the bottommost of said flow passage are arranged in said pump head
Implementation Method 3
the bubbles accumulated in the urea solution in the pump can be eliminated
Data Source
AI summary
A fluid delivery device, comprising an integrated cabinet, a pump installed in the integrated cabinet, an inlet pipeline connected to the pump, and an outlet pipeline connected to the pump; the pump comprises a motor located at the bottom portion of the integrated cabinet, a pump head located at the top portion of the integrated cabinet, and a magnetic coupling portion located between the motor and the pump head; the pump head, the magnetic coupling portion and the motor are arranged in a sequence from top to bottom; and the pump head is provided with a U-shaped flow channel and a gear mechanism therein located at the bottommost portion of the flow channel. The fluid delivery device eliminates bubbles in the solution accumulated in the pump, thus ensuring a working efficiency of fluid delivery of the pump, and ensuring precise control of a delivery amount.