Hydraulic Pressure Limiting Device with Common Support Stem
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hydraulic systems for vehicles face challenges in managing overpressures effectively, leading to potential damage to machines and seals, as current solutions require multiple pressure limiters and non-return valves, which complicate the system and increase manufacturing costs.
Innovation Solution
A pressure limiting device with a single unit that incorporates two valves associated with each supply line, using a common support rod and spring mechanism to open in case of overpressure, and integrates non-return valves for force-feeding, enhancing compactness and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple pressure limiters and non-return valves are used to manage overpressures, then the reliability of protecting machines and seals is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple pressure limiters and non-return valves into a single integrated device. The device includes a body with multiple ports, a common support rod, and multiple valves that share common components. This merging reduces the total number of separate components while maintaining the protective function against overpressures in hydraulic circuits.
Solution Approach 2:
The single pressure limiting device performs multiple functions simultaneously: it acts as both a pressure limiter and a non-return valve for force-feeding. The device can manage overpressures in multiple supply lines while also ensuring proper fluid flow direction, thereby reducing the need for separate dedicated components for each function.
2Reliability
If multiple pressure limiters are used to protect each supply line, then the protection coverage is improved, but the manufacturing cost increases
Solution Approach 1:
The patent integrates multiple pressure limiting functions into a single manufactured unit. The device includes a body with multiple ports (at least two supply lines and one discharge line), a common support rod, and multiple valves that share common components. This consolidation reduces the total number of separate components while maintaining the protective function against overpressures in hydraulic circuits.
Solution Approach 2:
The single pressure limiting device performs multiple functions simultaneously: it acts as both a pressure limiter and a non-return valve for force-feeding. The device can manage overpressures in multiple supply lines while also ensuring proper fluid flow direction, thereby reducing the need for separate dedicated components for each function.
3Device complexity
If a single pressure limiting device is used, then the system compactness and manufacturing cost are reduced, but the ability to manage overpressures in multiple lines may be compromised
Solution Approach 1:
The patent combines multiple pressure limiters and non-return valves into a single integrated device. The device includes a body with multiple ports, a common support rod, and multiple valves that share common components. This merging reduces the total number of separate components while maintaining the protective function against overpressures in hydraulic circuits.
Solution Approach 2:
The device is segmented into multiple independent valve units (at least two valves) that can operate independently to manage overpressures in different supply lines. Each valve is associated with a specific supply line but shares common support structures, allowing independent operation while maintaining system compactness.
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 effectively manages overpressures by using a single device to discharge excess pressure to the booster line or the other supply line, preventing damage and optimizing system compactness and manufacturing efficiency.
Implementation Method 1
at least one spring defining a setting which corresponds to said predetermined threshold
Implementation Method 2
adapted to open in case of overpressure above a predetermined threshold on the associated supply line in order to discharge the corresponding overpressure
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a pressure-limiting device designed to be installed in a system comprising a first line (11) and a second line (12) that can comprise pressurised oil, as well as comprising a discharge and/or booster line (10). The limiting device is characterised in that it comprises means (131, 132, 133, 134) forming two valves, each associated with one of the two lines and adapted to open in the event of an overpressure above a pre-determined threshold on the associated line, so as to discharge the corresponding overpressure towards the discharge and/or booster line, said two valves comprising a common support stem (126) that operates in traction under the action of at least one spring defining a pressure corresponding to the pre-determined threshold. The invention also relates to a hydraulic assist system and to a vehicle comprising such a device.