Injection Pump Adjustable Stroke Roller Bearing Drive
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Solution Overview
Problem
Existing injection pump technologies face difficulties in managing the rate and volume of additives injected into fluids without altering the power input to the pump piston, limiting flexibility and efficiency.
Innovation Solution
An improved injection pump design featuring a robust split-load roller bearing drive and an easily accessible adjustment bushing allows for adjustable piston stroke without interrupting power supply, combined with a spring energized seal and duplex heads for independent flow control, enhancing operational flexibility and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the power input to the pump piston is changed to manage additive injection rate, then the injection rate can be controlled, but the pump must be stopped or power interrupted which reduces productivity
Solution Approach 1:
The pump incorporates an adjustable stroke length mechanism that allows dynamic modification of the piston stroke during operation. This enables continuous adjustment of additive injection rates without stopping the pump or interrupting power supply, resolving the contradiction between maintaining continuous operation and adjusting injection rates flexibly.
Solution Approach 2:
The system changes the stroke length parameter of the piston to control injection rate instead of changing power input. By adjusting the stroke length through an accessible adjustment bushing, the injection rate can be modified while the pump continues operating at constant power, eliminating the need to stop or interrupt power supply.
2Reliability
If traditional packing is used for seal protection, then seal protection is provided, but field technicians may overtighten packing which causes premature seal wear
Solution Approach 1:
The spring energized seal mechanism automatically maintains proper sealing pressure through spring force, eliminating the need for manual packing adjustment. The spring-loaded design self-regulates to provide consistent seal protection without allowing user overtightening, thereby preventing premature seal wear while maintaining reliable sealing.
Solution Approach 2:
The spring energized seal acts as an intermediary between the sealing requirement and user operation. Instead of direct manual packing adjustment, the spring mechanism mediates the sealing function, providing consistent protection while preventing user error through its automatic pressure regulation capability.
3Area of stationary object
If a single pump head is used, then the mechanical footprint is larger, but duplex heads increase complexity and space requirements
Solution Approach 1:
The duplex pump head configuration merges two pump heads into a single integrated unit that shares common components such as the motor, drive mechanism, and housing. This combining approach doubles the injection capability while actually reducing the overall mechanical footprint compared to using two separate single-head pumps, resolving the contradiction between compact size and functional capacity.
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
Enables precise and reliable additive injection rates with reduced mechanical footprint and increased durability, optimizing fluid flow efficiency and preventing premature seal wear, while allowing for adjustments without stopping the pump.
Implementation Method 1
A spring energized seal eliminates overtightened packing by field technicians
Implementation Method 2
a robust split-load roller bearing drive is used to power the piston(s)
Data Source
AI summary
The present invention is directed to an improved liquid additive injection pump that of a type wherein a variety of additive volumes may be metered into a fluid stream or fluid source by adjusting the plunger stroke with an easily accessible adjustment bushing without changing or interrupting, the power supplied to the pump during operation. A robust roller bearing drive is used to power the plunger(s) providing fluid suction and discharge as the plunger(s) cycle, while ensuring accurate and reliable additive injection rates. A spring energized seal eliminates overtightened packing by field technicians. An easily accessible adjustment bushing allows the user to modify the piston stroke length, thereby increasing, decreasing or stopping the volumetric flow of injected additive into a fluid stream or storage container.