Air Motor PLC Valve Control for Pump Efficiency
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Solution Overview
Problem
Existing air motor systems for piston pumps lack efficient control mechanisms to manage motive fluid flow between upper and lower chambers, leading to suboptimal performance and efficiency in fluid pumping operations.
Innovation Solution
The air motor system incorporates a spool valve with a reduced and enlarged diameter section, a D-valve with a flat and concave surface, and a two-way pilot conduit, connected to a programmable logic controller, allowing for precise control of motive fluid flow between the upper and lower chambers through shifting positions that either introduce or vent fluid, optimizing piston movement and fluid pumping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a programmable logic controller interface is added to enable precise control of motive fluid flow, then control precision and performance are improved, but device complexity increases
Solution Approach 1:
The patent replaces manual or mechanical control systems with an automated programmable logic controller (PLC) interface. The PLC receives signals and automatically actuates the valve between different positions, substituting complex mechanical control mechanisms with an electronic control system that offers precise control through programmable logic while managing overall system complexity through integration.
2Productivity
If a spool valve with reduced and enlarged diameter sections is used to control pilot chamber pressure, then fluid flow control is improved, but device complexity increases
Solution Approach 1:
The spool valve incorporates local quality variations through its reduced diameter section and enlarged diameter section. These different diameter sections create distinct flow characteristics at different locations along the spool valve, enabling precise control of pilot chamber pressure and motive fluid flow without requiring multiple separate valve components, thus improving fluid flow control while managing overall device complexity.
3Measurement precision
If a D-valve with flat and concave surfaces is implemented for precise fluid direction, then control precision is improved, but manufacturing complexity increases
Solution Approach 1:
The D-valve employs local quality variations with its flat surface and concave surface. The flat surface provides a sealing interface for precise fluid direction control, while the concave surface creates a pilot chamber for pressure control. This localized differentiation of surface geometry enables precise control functions within a single integrated component, improving control precision while avoiding the need for multiple separate parts that would increase manufacturing complexity.
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
This configuration enhances the efficiency and control of piston movement, improving the overall performance of the piston pump by ensuring precise fluid management and optimized operation cycles.
Implementation Method 1
A spool valve is shiftable to a first position in response to motive fluid pressurizing the pilot chamber portion, and a second position in response to the pilot chamber portion being at atmospheric pressure
Implementation Method 2
A D-valve has a flat surface surrounding a concave surface, and the flat surface is in sliding contact with the D-valve plate and the concave surface facing the D-valve plate
Implementation Method 3
A pilot port is fluidly connected to the pilot chamber portion by a two-way pilot conduit
Data Source
AI summary
A pump assembly having an air motor includes a valve connected to a motive fluid inlet of the air motor. The valve shifts between a first position, in which a flow of motive fluid is directed into a pilot port, through a two way pilot conduit and into a pilot chamber portion, and a second position, in which the flow of motive fluid is inhibited from flowing into the pilot port through the two way pilot conduit and into the pilot chamber portion, and in which fluid in the pilot chamber portion flows out through the two way pilot conduit and is directed by the valve to exhaust. The valve is connected to a programmable logic controller, so that the valve is shifted between the first position and the second position in response to the programmable logic controller.