Pump Device Orifice Segmentation for Pulse Pressure and Discharge Flow
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Solution Overview
Problem
Existing pump devices face limitations in discharge performance and pulsation reduction, particularly in managing flow amounts and maintaining stability across varying operational conditions.
Innovation Solution
A pump device with a pulsation reduction unit featuring a first orifice for reducing pulse pressure and a second orifice that opens when the discharge flow exceeds a predetermined amount, allowing increased flow passage area to secure required flow amounts and improve pressure increase performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a variable aperture is used to reduce pulsation, then pulse pressure is reduced, but discharge performance deteriorates due to increased flow resistance
Solution Approach 1:
The discharge passage is segmented into multiple parallel passages (first discharge passage with first orifice and second discharge passage with second orifice). This segmentation allows the system to distribute flow across multiple paths, reducing resistance while maintaining pulsation reduction capabilities through the specific orifice configurations in each passage.
Solution Approach 2:
The aperture configuration is made dynamic through the opening/closing mechanism of the second orifice. When the discharge amount exceeds a predetermined threshold, the second orifice opens to provide an additional flow path, automatically adjusting the system's flow resistance characteristics based on real-time discharge requirements without compromising pulsation reduction.
2Productivity
If the flow passage area is increased to improve discharge performance, then discharge amount increases, but pulse pressure reduction capability deteriorates
Solution Approach 1:
The discharge passage is divided into multiple parallel passages with different orifice configurations. The first discharge passage maintains pulsation reduction with its specific orifice design, while the second discharge passage provides additional flow capacity when activated, allowing the system to achieve both pulse pressure reduction and high discharge amount simultaneously through parallel flow paths.
Solution Approach 2:
Different regions of the discharge system are assigned different functional qualities: the first discharge passage with first orifice is optimized for pulsation reduction, while the second discharge passage with second orifice is optimized for high-flow discharge. This local differentiation allows each passage to excel at its specific function while contributing to overall system performance.
3Stress or pressure
If a single orifice is used to reduce pulsation, then pulse pressure is reduced, but discharge performance is limited due to fixed flow resistance
Solution Approach 1:
The system transitions from a static single-orifice configuration to a dynamic multi-orifice system where the second orifice opens or closes based on discharge amount. This dynamic adjustment allows the flow resistance to adapt automatically: maintaining high resistance for pulsation reduction at low flow, and reducing resistance for high-performance discharge at high flow, eliminating the need to choose between the two objectives.
Solution Approach 2:
The discharge system is designed with multi-functionality through the parallel orifice configuration. The first orifice provides pulsation reduction function, while the second orifice provides high-flow discharge function. When both orifices are considered together, the system achieves both pulsation reduction and high discharge performance, making the discharge system universally capable of handling different operational requirements.
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 solution enhances discharge performance by reducing pulse pressure in low flow regions and ensuring stable pressure increase in high flow regions, improving overall operational efficiency and reducing noise.
Implementation Method 1
a first orifice 301 which is provided on a discharge oil passage 12 of the pump 2
Implementation Method 2
a second orifice 302 which, when a flow amount Q becomes greater than a predetermined flow amount Q1, allows pass of the brake fluid
Data Source
AI summary
An object of the present invention is to provide a pump device that is capable of improving a discharge performance. A first orifice 301 that is provided on a discharge oil passage (a pipe 12) of a pump 2 and a second orifice 302 that, when a flow amount Q becomes greater than a predetermined flow amount Q1, allows pass of brake fluid are provided.