Water-Lubricated High-Pressure Pump Without Hydrostatic Support
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Solution Overview
Problem
Existing water-lubricated high-pressure water pumps are prone to damage from pollutants and have low pressure output due to structural complexity and high-pressure water leakage, with limited materials suitable for water lubrication.
Innovation Solution
A high-pressure water pump design utilizing a driving mechanism with eccentric and thrust structures in a water or aqueous solution environment, featuring anti-friction layers and rolling contact to reduce friction and enhance lubrication, eliminating hydrostatic support and improving structural simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydrostatic support is adopted to reduce friction in water-lubricated pumps, then lubrication performance is improved, but structural complexity increases and the system becomes more susceptible to pollution damage
Solution Approach 1:
The patent removes the hydrostatic support system entirely from the water-lubricated pump design. Instead of using complex hydrostatic bearings and support structures, the invention employs a simplified direct water lubrication system where water directly lubricates the friction surfaces between moving parts, eliminating the problematic hydrostatic support while maintaining acceptable lubrication performance
Solution Approach 2:
The patent replaces the mechanical hydrostatic support system with a fluid-based direct water lubrication approach. By substituting the complex mechanical hydrostatic bearing structure with direct water injection and natural hydrodynamic lubrication, the system achieves simpler mechanics while reducing vulnerability to pollution
2Ease of manufacture
If traditional materials are used in water-lubricated pumps, then manufacturing is easier, but lubricity is poor and high-pressure performance is limited
Solution Approach 1:
The patent employs composite material structures for friction surfaces, combining base materials with surface coatings or treatments that provide enhanced lubricity. The friction surfaces use composite structures that integrate low-friction materials or surface layers designed specifically for water lubrication, achieving both good lubricity and manufacturability
Solution Approach 2:
The patent modifies surface parameters of friction materials through surface treatments, coatings, or material selection optimized for water lubrication. By changing surface roughness, hardness, or chemical composition parameters, the system achieves improved lubricity while maintaining manufacturability of the base components
3Object-affected harmful factors
If water is used as lubricant instead of lubricating oil, then environmental protection is improved, but lubrication effectiveness decreases due to low viscosity
Solution Approach 1:
The patent utilizes hydraulic principles by optimizing water pressure, flow rate, and distribution in the lubrication system. By applying controlled water pressure to friction surfaces and designing hydraulic channels that deliver water efficiently to contact zones, the system compensates for water's low viscosity and achieves effective lubrication while maintaining environmental benefits
Solution Approach 2:
The patent introduces aqueous solutions or additive packages as intermediaries between water and friction surfaces. These additives enhance water's lubricating properties by forming protective films or modifying tribological characteristics, allowing water-based lubrication to achieve effectiveness comparable to oil while retaining environmental advantages
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 design achieves higher pressure output (up to 50 MPa) with improved pollution resistance and volumetric efficiency, reducing friction and wear through hydrodynamic pressure lubrication, and simplifying maintenance.
Implementation Method 1
reducing friction through hydrodynamic pressure
Implementation Method 2
water or aqueous solution enters the first sliding friction pair in the shell
Implementation Method 3
anti-friction layers made of plastic to enhance lubricity
Implementation Method 4
the plunger moves in the plunger cavity under the rebound force of the rebound structure to suck in water or aqueous solution
Data Source
AI summary
A high-pressure water pump lubricated by water or aqueous solution is provided, which includes a driving mechanism, a shell, a rebound structure, at least one plunger and a plunger cavity. The driving mechanism includes a main shaft and at least one eccentric structure arranged on the main shaft, a thrust structure is sleeved on the outer side of each eccentric structure, the thrust structure and the eccentric structure rotate relative to each other, and constitute the first sliding friction pair. The eccentric structure and the thrust structure are located in the shell, and spaces in the shell are filled with water or an aqueous solution that enters the first sliding friction pair. When the eccentric structure is rotated, the thrust structure pushes the plunger to move in the plunger cavity. The plunger moves in the plunger cavity under the rebound force of the rebound structure.