Wobble Piston Pump Phase Offset for Flow Pulsation
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Solution Overview
Problem
Conventional wobble piston pumps exhibit significant pulsation in discharge flow, which is undesirable for metering coating agents like paint in coating installations, necessitating a solution for achieving a more constant discharge flow.
Innovation Solution
The implementation of a wobble piston pump with multiple pump units connected in parallel, where each unit executes a wobble movement, with a common drive shaft and conversion gear mechanism to convert rotary movement into wobble movement, and a toothed gear mechanism for power transmission, allowing for phase offsetting of discharge flows to minimize pulsation, and using composite materials for the pistons to enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single wobble piston pump is used, then the device complexity is low, but the discharge flow pulsation is high
Solution Approach 1:
The pump system is divided into multiple independent pump units (first pump unit, second pump unit, etc.), each with its own wobble piston and cylinder. These segmented units operate in parallel to combine their discharge flows, thereby reducing pulsation while maintaining manageable complexity through modular design
Solution Approach 2:
Multiple pump units are merged into a single integrated pump system with common drive shaft and conversion gear mechanism. The discharge flows from individual units are combined at the outlet, smoothing out pulsations while achieving the desired flow stability
2Stability of the object's composition
If multiple pump units are connected in parallel, then the discharge flow pulsation is reduced, but the device complexity increases
Solution Approach 1:
The common drive shaft and conversion gear mechanism serve multiple pump units simultaneously, providing universal power transmission. This multi-functional approach reduces overall system complexity compared to having separate drive mechanisms for each pump unit
Solution Approach 2:
The pump units operate with phase offsets in their periodic wobble movements, creating alternating discharge patterns that naturally cancel out pulsations when combined, achieving flow stability through coordinated periodic action
3Power
If a common drive shaft is used for multiple pump units, then the power transmission efficiency is improved, but the weight increases
Solution Approach 1:
Instead of using a single heavy common drive shaft for all pump units, the design employs separate drive shafts for each pump unit that are copied from a standard configuration. This reduces the overall weight while maintaining power transmission efficiency through standardized, optimized components
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 significantly reduces pulsation in the discharge flow, achieving a more constant and efficient metering of coating agents, with pulsation reduced to less than 5%, and allows for separate discharge of multiple components without chemical reaction, while maintaining a reasonable weight and complexity balance.
Implementation Method 1
the conversion gear mechanism converting the pure rotary movement of the drive shaft into the wobble movement
Implementation Method 2
a toothed gear mechanism for power transmission
Data Source
AI summary
Exemplary illustrations directed to a rotary piston pump, e.g., for metering a coating agent in a coating installation, as well as exemplary methods of using the same, are disclosed. An exemplary piston pump may comprise a plurality of pump units, each having one cylinder and one rotary piston which carries out a wobbling or tumbling movement in the cylinder.