Self-Lubricating Water-Cooled Piston Pump for Carpet Cleaners
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Piston-type water pumps in carpet cleaning machines face premature wear and leakage issues due to inadequate cooling and lubrication, leading to potential staining of carpets when seals or bearings fail.
Innovation Solution
A self-lubricating, water-cooled piston-style water pump design with a unitary housing and direct water communication to the crankcase, using thermoplastic bearings and seals, and a unique water flow mechanism through one-way valves for lubrication and cooling, eliminating the need for grease or heavy oils.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grease or heavy lubricant is applied to the crankcase components, then the moving parts are lubricated and prevented from premature wear, but the pump structure becomes more complex and may leak onto carpets causing stains
Solution Approach 1:
The patent removes the grease lubrication system entirely from the crankcase, extracting the harmful lubricant that could leak onto carpets. Instead, the crankcase is designed to be directly flooded with water from the pump inlet, eliminating the need for separate grease lubrication components and simplifying the overall pump structure while maintaining reliable lubrication through water.
Solution Approach 2:
The pump system uses the water being pumped to automatically lubricate and cool the crankcase components. The water flow serves dual purposes: it is the product being pumped and simultaneously provides lubrication and cooling for the moving parts, eliminating the need for separate lubrication systems and reducing structural complexity.
2Temperature
If external cooling methods are used, then the moving parts are cooled, but the pump structure becomes more complex and cooling effectiveness is reduced
Solution Approach 1:
The water serving as the pumped medium performs multiple functions simultaneously: it is compressed by the pump, cools the crankcase components through direct contact, and lubricates the moving parts. This multi-functionality eliminates the need for separate cooling systems like external fans or internal coolant loops, significantly reducing structural complexity while improving cooling effectiveness.
Solution Approach 2:
The patent merges the cooling function with the pumped water flow itself. Instead of having a separate cooling system, the water that is being pumped is directed to cool the crankcase components, combining two functions (pumping and cooling) into a single integrated system that reduces overall complexity.
3Temperature
If water is directed into the crankcase for cooling, then cooling effectiveness is improved, but the risk of seal failure and grease leakage increases
Solution Approach 1:
The patent removes grease from the crankcase environment entirely, replacing it with water lubrication. Since grease is extracted from the system, there is no grease to leak onto carpets even if seals fail. The water lubrication system is inherently cleaner and eliminates the harmful effects of grease leakage while maintaining effective cooling.
Solution Approach 2:
The patent accepts that water may enter the crankcase and potentially cause wear over time, but this is acceptable because water is inexpensive and environmentally benign compared to grease. The system prioritizes preventing harmful grease leakage over maintaining perfect seal integrity, using water as a sacrificial lubricant that can be easily replaced if contaminated.
4Ease of manufacture
If a simple pump structure is used, then manufacturing and maintenance are easier, but cooling and lubrication effectiveness may be insufficient
Solution Approach 1:
The simplified pump structure uses the pumped water itself to provide cooling and lubrication, eliminating the need for complex external cooling systems or separate lubrication circuits. The water flow automatically serves the crankcase components, maintaining reliability through self-regulating thermal management while keeping the overall structure simple and easy to manufacture.
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 pump is simple, long-lasting, and prevents staining, as it uses the pumped water for lubrication and cooling, ensuring reliable operation and cleanliness during carpet cleaning.
Implementation Method 1
a self-lubricating water-cooled piston-style water pump
Implementation Method 2
water-cooled by the same water that the pump is compressing
Implementation Method 3
A compression chamber is in direct pressurized water communication with a high pressure water manifold through a one-way valve
Data Source
AI summary
A self-lubricating water-cooled piston-style water pump has a unitary pump housing with a crankcase in direct water communication with the water pump inlet. A low pressure chamber is in direct water communication with the crankcase. A compression chamber is in direct pressurized water communication with a high pressure water manifold through a one-way valve. A high pressure water pump outlet extends outwardly from the manifold to the exterior of the housing. A crankshaft is connected to a connecting rod and a plunger rod, both of which are lubricated and water-cooled in the crankcase. A compression plunger has water channels therethrough connected to the plunger rod and in water communication with the low pressure chamber. The plunger is reciprocal within the compression chamber. A second one-way valve is on the plunger in the compression chamber to let water into the compression chamber.