Drainage Pump Rib Structure to Prevent Backflow and Reduce Vibration
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Solution Overview
Problem
Existing drainage pumps in cloth treating apparatuses experience backflow phenomena during circulation and drainage processes, leading to reduced water flow rates and increased vibration and noise.
Innovation Solution
A drainage pump design featuring a housing with a suction port, first and second discharge ports, an impeller, and strategically positioned ribs to minimize vortex formation, along with an inflow guide surface with a curved section to enhance fluid flow and prevent backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the drainage pump operates at high speed to maintain flow rate, then productivity is improved, but backflow phenomenon increases and vibration and noise increase
Solution Approach 1:
The water flow portion is divided into multiple discharge ports (first discharge port and second discharge port) with ribs positioned between them. This segmentation creates separate flow paths that prevent backflow while maintaining high-speed operation capability.
Solution Approach 2:
Ribs are strategically positioned at specific locations within the water flow portion, particularly between discharge ports and near the impeller. This local structural modification optimizes flow characteristics in critical areas without affecting overall pump performance.
2Reliability
If the drainage pump operates at high speed to prevent backflow, then reliability is improved, but vibration and noise increase
Solution Approach 1:
The inflow guide surface incorporates a curved section that smoothly guides water into the impeller. This curvature eliminates flow separation and turbulence, reducing vibration and noise while maintaining reliable backflow prevention during high-speed operation.
Solution Approach 2:
The curved inflow guide surface optimizes the flow parameters (velocity distribution, flow angle) entering the impeller. This parameter optimization ensures smooth flow transition and reduces turbulent fluctuations, thereby minimizing vibration and noise.
3Object-generated harmful factors
If the drainage pump reduces motor speed to minimize vibration and noise, then harmful factors are reduced, but flow rate decreases
Solution Approach 1:
The curved inflow guide surface maintains smooth, laminar flow at all operating speeds, preventing flow separation and turbulence. This allows the pump to operate at lower speeds with reduced vibration and noise while maintaining adequate flow rate.
Solution Approach 2:
The optimized curved geometry of the inflow guide surface improves flow parameters across the operating range, enabling efficient operation at reduced speeds without significant flow rate loss.
4Device complexity
If the drainage pump uses a single motor for both circulation and drainage functions, then device complexity is reduced, but backflow control becomes difficult
Solution Approach 1:
The water flow portion is segmented into distinct regions with ribs positioned to create separate flow paths for circulation and drainage modes. This segmentation enables a single motor to control both functions effectively by preventing backflow in either direction.
Solution Approach 2:
The rib structure and discharge port arrangement are designed to handle both circulation and drainage operations with a single motor system. The universal design allows the same pump structure to perform multiple functions without backflow interference.
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 prevents backflow, maintains a minimum required flow rate, and reduces vibration and noise, improving the overall performance of the drainage process and circulation process.
Implementation Method 1
an impeller disposed in the receiving space and configured to rotate about a rotation axis to thereby discharge the fluid in the receiving space through the first discharge port or the second discharge port
Implementation Method 2
a first rib that protrudes from an inner circumferential surface of the housing toward a center of the receiving space and that is disposed between the first discharge port and the second discharge port; and a second rib that protrudes from a portion of the first rib toward the center of the receiving space
Implementation Method 3
an inflow guide surface with a curved section to enhance fluid flow
Data Source
AI summary
A drainage pump includes a housing that defines a receiving space configured to receive fluid. The housing defines a suction port configured to introduce fluid into the receiving space, and a first discharge port and a second discharge port that are configured to discharge the fluid in the receiving space to an outside of the housing. The drainage pump further includes an impeller disposed in the receiving space and configured to rotate about a rotation axis to thereby discharge the fluid in the receiving space through the first discharge port or the second discharge port; a first rib that protrudes from an inner circumferential surface of the housing toward a center of the receiving space and that is disposed between the first discharge port and the second discharge port; and a second rib that protrudes from a portion of the first rib toward the center of the receiving space.