Pump Drive Assembly With External Pinion for High-Pressure Reciprocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fluid displacement systems, such as those used in fluid dispensing systems for paint, face challenges in efficiently converting rotational motion to linear motion for high-pressure fluid pumping, particularly in systems where the pinion shaft extends through the motor, leading to inefficiencies and potential interference with electromagnetic components.
Innovation Solution
A drive system for a reciprocating fluid displacement pump utilizing an eccentric driver with an outer rotor and a pinion drive that is supported by dual bearings, converting rotational output to linear motion without extending through the motor, and using a modular design for easy assembly and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pinion shaft extends through the motor to convert rotational motion to linear motion, then the mechanical conversion function is achieved, but it causes interference with electromagnetic components and reduces system efficiency
Solution Approach 1:
The patent extracts the pinion shaft from the motor assembly by using an external drive shaft that connects to the motor output without extending through the motor housing. This separation eliminates the interference with electromagnetic components while maintaining the rotational to linear motion conversion function through the eccentric mechanism and piston assembly.
Solution Approach 2:
The patent introduces an eccentric mechanism as an intermediary between the motor's rotational output and the piston's linear motion. The eccentric converter transforms rotational motion into reciprocating linear motion without requiring the pinion shaft to pass through the motor, thereby avoiding electromagnetic interference while achieving the desired motion conversion.
2Device complexity
If a fixed motor-pump assembly is used, then structural simplicity is achieved, but maintenance and component replacement become difficult
Solution Approach 1:
The patent segments the pump assembly into modular components including the pump housing, piston assembly, eccentric converter, and drive mechanism. These segmented components can be independently accessed, removed, and replaced through service ports in the housing, maintaining structural simplicity while enabling easy maintenance and repair operations.
3Stress or pressure
If high-pressure pumping capability is implemented, then fluid application performance is improved, but the risk of electromagnetic interference with mechanical components increases
Solution Approach 1:
The patent extracts the drive shaft connection from the motor housing to prevent electromagnetic interference, while implementing robust shielding and grounding measures on the motor and electromagnetic components. This allows the system to achieve high pumping pressures through the piston mechanism without the electromagnetic interference that would occur with a traditional through-housing shaft design.
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 high fluid pumping pressures up to 69 MPa (10,000 psi) with efficient conversion of rotational to linear motion, allowing for modular assembly and effective operation without interference with electromagnetic components, facilitating high-pressure fluid application.
Implementation Method 1
an outer rotator motor having a stator and a rotor that rotates about the stator
Implementation Method 2
The pinion drive interfaces with a gear of the drive to provide rotational input to the drive
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A rotational output assembly is configured to provide power to a drive assembly to cause pumping by a pump. The rotational output assembly includes an electric motor and a pinion drive projecting axially from the motor. The pinion drive interfaces with bearings supported on a pump frame. The pinion drive includes a gear teeth section between portions interfacing with the bearings supported on the pump frame. The gear teeth section interfaces with a drive gear of the drive assembly to cause rotation of the drive gear.