Electromagnetic Pump with Segmented Chambers
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Solution Overview
Problem
Existing electromagnetic pumps face challenges in achieving sufficient pressure-feed capability due to weak attractive forces from electromagnetic coils, requiring larger coil sizes, and suffer from size constraints in vehicle-mounted hydraulic systems, along with unstable electromagnetic force generation due to heat issues.
Innovation Solution
An electromagnetic pump design featuring a piston that reciprocates within a cylinder, utilizing both electromagnetic and elastic forces to manage fluid chamber capacities, with on-off valves to control fluid flow, allowing for improved pressure-feeding capability and reduced size, while stabilizing discharge pressure through a combination of electromagnetic and elastic forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electromagnetic coils are increased in size to obtain sufficient pressure-feed capability, then pressure-feeding capability is improved, but pump size increases
Solution Approach 1:
The pump chamber is divided into two separate chambers (first pump chamber and second pump chamber) that operate independently but cooperatively. Each chamber has its own discharge path and check valve arrangement, allowing the system to achieve higher overall pressure-feeding capability without requiring a single oversized electromagnetic coil, thus maintaining compact pump dimensions.
Solution Approach 2:
The patent combines the functions of two pump chambers with different discharge characteristics into a single pump unit. The first chamber discharges to a intermediate pressure through one check valve, while the second chamber discharges to the same outlet through another check valve, merging their pressure-feeding effects to achieve sufficient overall capability without increasing individual coil sizes.
2Volume of moving object
If electromagnetic coils are made smaller to reduce pump size, then pump size is reduced, but pressure-feed capability becomes insufficient
Solution Approach 1:
By segmenting the pump into two chambers, each with smaller electromagnetic coils, the system achieves compact overall size while maintaining sufficient pressure-feeding capability through the combined output of both chambers. Each chamber operates at optimal coil size for its specific discharge requirement.
Solution Approach 2:
The patent uses hydraulic principles with check valves to combine the discharge from two smaller pump chambers into a single high-pressure outlet. The fluid dynamics and pressure accumulation mechanisms allow smaller individual chambers to collectively achieve the pressure-feeding capability of a larger single chamber.
3Power
If electromagnetic force is increased to improve pressure-feeding capability, then pressure-feeding capability is improved, but electromagnetic force generation becomes unstable due to heat
Solution Approach 1:
The electromagnetic system is divided into two separate electromagnetic coils, each driving its own pump chamber. This segmentation distributes the heat generation and electromagnetic load, preventing the heat accumulation and force instability that would occur in a single high-power electromagnetic system, thereby improving reliability.
4Device complexity
If a single pump chamber is used, then device complexity is reduced, but pressure-feed capability is insufficient
Solution Approach 1:
The patent merges two pump chambers with different discharge characteristics into a single integrated pump unit with a common outlet. This combination achieves superior pressure-feeding capability while maintaining relatively simple overall structure through shared components such as the common outlet passage and coordinated check valve arrangements.
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 design enhances pressure-feeding capability, reduces pump size, and achieves more stable discharge pressure by leveraging a combination of electromagnetic and elastic forces, minimizing the required electromagnetic force and preventing noise from collisions through the use of an elastic member.
Implementation Method 1
an electromagnetic portion that moves the piston forward by an electromagnetic force
Implementation Method 2
an elastic member that moves the piston backward by applying an elastic force to the piston in a direction opposite to that of the electromagnetic force
Data Source
AI summary
A piston is slidably provided in a cylinder and partitions a first pump chamber, and a second pump chamber connected to an object to be operated. A first on-off valve is provided between the first pump chamber and the outside. A second on-off valve is provided in a connecting flow passage that connects the first pump chamber and the second pump chamber to each other. When the piston is moved forward by an electromagnetic force of a solenoid portion, a capacity of the first pump chamber decreases, and a capacity of the second pump chamber increases. When the piston is moved backward by a biasing force of a spring, the capacity of the first pump chamber increases, and the capacity of the second pump chamber decreases. A pressure receiving area of the front face of the piston is larger than that of the back face thereof.