Hydraulic Regulator Cam Profile for Stable Pressure Control
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Solution Overview
Problem
Existing hydraulic pressure regulators struggle to accurately regulate pressure while handling pressure spikes, high and low flow events, and other challenges, often leading to instability and inefficiency.
Innovation Solution
A hydraulic regulator design featuring a control piston with a linear cam profile and vent and supply valves, which ensures that only one valve opens at a time to maintain stable pressure, utilizing a combination of spring and hydraulic pilot pressure for precise control, and incorporating a pilot stage regulator for enhanced accuracy and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pressure regulator is used to reduce supply pressure to a regulated pressure, then the basic pressure reduction function is achieved, but the system experiences instability and inability to handle pressure spikes effectively
Solution Approach 1:
The regulator is divided into two independent valves: a supply valve for normal pressure reduction and a vent valve for pressure spike management. Each valve operates independently with its own cam profile section, allowing the system to handle both steady-state regulation and transient pressure events effectively without compromise
Solution Approach 2:
The control piston serves multiple functions by integrating both supply cam profile and vent cam profile on the same component. This single piston responds to regulated pressure changes and activates the appropriate valve (supply or vent) based on the cam profile geometry, providing both pressure reduction and pressure spike relief capabilities
2Adaptability or versatility
If multiple valves are used to handle different pressure conditions, then adaptability to various flow events is improved, but the complexity of the device increases
Solution Approach 1:
The supply valve and vent valve are integrated into a single valve body with shared internal passages and a common control piston. The cam profiles for both valves are formed on the same piston, and both valves respond to the same regulated pressure changes, reducing the number of independent control mechanisms while maintaining adaptability to different flow conditions
3Device complexity
If a single cam profile controls both supply and vent valves, then the control mechanism is simplified, but it becomes difficult to ensure that only one valve opens at a time
Solution Approach 1:
The cam profile is divided into distinct local sections: a supply cam profile section that activates the supply valve and a vent cam profile section that activates the vent valve. These sections are positioned such that only one section can engage its corresponding valve at any given time, ensuring proper sequencing while maintaining a unified control piston structure
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 provides smooth and accurate setting of regulated pressure, effectively managing pressure spikes and flow events, ensuring stability and predictability in hydraulic systems.
Implementation Method 1
The control piston may move in a first direction to open the vent valve and in a second, opposite direction to open the supply valve. The control piston may be exposed on a first end thereof to the regulated pressure port such that the piston moves in the first direction when a regulated pressure exceeds a predetermined limit.
Implementation Method 2
The control piston is exposed on a second, opposite end thereof, to a set spring. The control piston may move in the second direction when the regulated pressure on the first end exceeds a force of the set spring on the second end of the piston.
Implementation Method 3
The control piston is exposed on a second, opposite end thereof, to a hydraulic pilot pressure. The control piston may move in the second direction when the regulated pressure on the first end exceeds a force of the pilot pressure on the second end of the piston.
Implementation Method 4
A fluid pathway between the control piston and the pilot pressure may be damped by a check valve with an orifice.
Data Source
AI summary
A vent valve opens to provide a fluid path from a regulated pressure port to a vent port, a supply valve opens to provide a fluid path from the regulated pressure port to a supply pressure port. A control piston has a linear cam profile with a vent cam that opens the vent valve and a supply cam that opens the supply pressure valve.