Waterjet System Pressure Reduction and Abrasive Segmentation
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Solution Overview
Problem
Current waterjet systems are limited by high machine costs, maintenance requirements, and spatial needs due to high working pressures and power demands, making them inaccessible to entities without significant resources.
Innovation Solution
A waterjet system operating at pressures between 2000 psi and 8000 psi, with a compact design featuring a diaphragm or piston pump, and an abrasive collection system, allowing for lower power consumption and reduced infrastructure needs, utilizing standard household power sources and simpler filtration systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high pressure waterjet systems (10,000-60,000 psi) are used to achieve effective cutting, then cutting capability is improved, but machine cost and infrastructure requirements increase significantly
Solution Approach 1:
The patent changes the operating pressure parameter from conventional 10,000-60,000 psi down to 2,000-8,000 psi, achieving effective cutting at lower pressures through optimized pump and nozzle design. This parameter change directly reduces machine cost and infrastructure requirements while maintaining cutting capability
Solution Approach 2:
The patent employs simpler, less expensive pump components that operate at lower pressures, replacing the need for expensive high-pressure hydraulic systems. The system uses standard industrial pump components rather than specialized high-pressure equipment, significantly reducing overall system cost
2Productivity
If high power motors (20-100 hp) are used to drive high pressure pumps, then waterjet performance is improved, but power consumption and infrastructure needs increase
Solution Approach 1:
The patent changes the power parameter by operating pumps at lower pressures (2,000-8,000 psi vs. 10,000-60,000 psi), which directly reduces the horsepower requirement. The system achieves effective cutting with significantly reduced power consumption, eliminating the need for high-power industrial motor infrastructure
3Productivity
If abrasive is suspended in pressurized water upstream of the pump, then cutting speed is improved, but internal wear to the pump increases
Solution Approach 1:
The patent segments the waterjet system into separate functional zones: clean water pressurization (without abrasive) and abrasive injection (downstream at the cutting head). This segmentation prevents abrasive contact with the pump, eliminating internal wear while maintaining cutting effectiveness through proper mixing at the point of application
Solution Approach 2:
The patent introduces a mixing chamber or injection mechanism as an intermediary between the pump output and the workpiece. Abrasive is injected into the high-velocity water stream at this intermediary point, allowing the pump to handle only clean water while the mixing zone combines abrasive and water for cutting, thus protecting the pump from abrasive wear
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 system achieves cost-effective and efficient cutting operations with reduced maintenance and infrastructure requirements, making it accessible to a wider range of users and applications.
Implementation Method 1
a pump configured to pump fluid at a pressure between 2000 psi and 8000 psi
Implementation Method 2
accelerates the flow through a small orifice into a high velocity fluid stream
Implementation Method 3
Waterjet systems convert high pressure water into a high velocity water stream in an effort to erode the material that it is directed at
Implementation Method 4
An abrasive may be present in this high velocity water stream. Such an abrasive may improve the cutting speed or expand the range of materials that can be cut
Implementation Method 5
a mixing chamber configured to mix abrasive from the hopper and the fluid from the pump to produce a slurry
Implementation Method 6
A waterjet system operating at pressures between 2000 psi and 8000 psi, with a compact design featuring a diaphragm or piston pump
Data Source
AI summary
A waterjet system is provided, including a pump configured to pump fluid, an electric motor configured to drive the pump, a hopper configured to store abrasive, and a mixing chamber configured to mix abrasive from the hopper and the fluid from the pump to produce a slurry. A cutting bed is configured to receive a workpiece to be cut. A cutting head is configured to expel the slurry through the outlet nozzle as a high-velocity jet into the cutting bed.