Hydraulic Brake Damping Device Variable Orifice
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Solution Overview
Problem
Conventional hydraulic brake systems face increased manufacturing and assembly time, as well as higher costs, due to the need for a separate orifice to attenuate pressure pulsation, and they struggle to efficiently reduce pressure pulsation and noise caused by abrupt flow variations during pumping operations.
Innovation Solution
A hydraulic brake system with a damping device that integrates a variable orifice formed by a slot on the sleeve's inner surface, featuring a damping piston and elastic member, which adjusts the orifice's cross-sectional area to attenuate pressure pulsation and noise, reducing the need for additional orifice installation and enhancing damping efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate orifice is manufactured and assembled to attenuate pressure pulsation, then pressure pulsation can be reduced, but manufacturing and assembling time increases and manufacturing costs increase
Solution Approach 1:
The patent integrates the orifice function directly into the damping device by forming a slot on the inner circumferential surface of the sleeve. This eliminates the need for a separate orifice component, combining multiple functions (damping and flow restriction) into a single integrated structure, thereby reducing manufacturing and assembly time while maintaining pressure pulsation attenuation capability
Solution Approach 2:
The sleeve in the damping device is designed to serve multiple functions: it acts as both the damping chamber boundary and the flow restriction element through the integrated slot. This multi-functional design eliminates the need for separate dedicated orifice components, reducing part count and assembly complexity
2Device complexity
If a conventional damping device is designed simply to attenuate pressure pulsation, then the structure is simple, but it is difficult to obtain an efficient attenuation effect of pressure pulsation
Solution Approach 1:
The patent employs a variable orifice design where the slot width varies along the axial direction of the sleeve, creating different flow resistance at different positions. This dynamic flow restriction pattern enables more effective pressure pulsation attenuation compared to a simple constant orifice, while maintaining relatively simple device structure
Solution Approach 2:
The slot dimensions, particularly the width varying along the axial direction, are optimized to change parameters of fluid flow resistance. This parameter variation allows the damping device to achieve efficient pressure pulsation attenuation by creating appropriate flow restrictions without complex structural modifications
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 integrated variable orifice design reduces manufacturing and assembly time, effectively minimizes pressure pulsation and noise, and improves damping efficiency by adjusting the orifice area in response to hydraulic pressure changes, enhancing the overall performance of the hydraulic brake system.
Implementation Method 1
an elastic member provided inside the sleeve and configured to elastically support the damping piston
Implementation Method 2
a damping device configured to attenuate pressure pulsation of brake oil discharged according to a driving of a pump
Implementation Method 3
the damping piston is provided to be moved to pressurize the elastic member when hydraulic pressure of the brake oil discharged from the pump is equal to or greater than a predetermined pressure
Data Source
AI summary
Disclosed herein is a hydraulic brake system. The hydraulic brake system comprises a damping device configured to attenuate pressure pulsation of brake oil discharged according to a driving of a pump, wherein the damping device includes a sleeve fixed to a bore that is connected to a discharge end of the pump and having an opened one side, a damping piston slidably installed inside the sleeve, and an elastic member provided inside the sleeve and configured to elastically support the damping piston, and wherein a slot having a width which is varied is formed at an inner circumferential surface of the sleeve in a direction in which the brake oil flows so that a variable orifice is formed between the damping piston and the sleeve.