Separator Piston Oil Tank With Safety Valve for Pressure Surges
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Solution Overview
Problem
Existing electro-hydraulic riveting tools experience reduced service life and potential damage to air bags due to significant instantaneous pressure changes, leading to frequent maintenance.
Innovation Solution
A piston-type oil tank with a separator piston and safety valve system that withstands pressure changes, featuring an oil outlet and air outlet to balance pressures, a safety valve core with a support frame and stop plate to limit movement, and a return spring for resetting the piston, ensuring smooth oil discharge and preventing excessive pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an air bag is used to maintain pressure balance and separate atmosphere from oil, then cavitation is prevented, but the air bag is damaged by instantaneous pressure changes reducing service life
Solution Approach 1:
A separator piston is introduced as an intermediary component between the oil and atmosphere, replacing the vulnerable air bag. The piston performs the mediating function of pressure balance maintenance while being mechanically robust against pressure fluctuations.
Solution Approach 2:
The air bag is extracted/removed from the system and replaced with a separator piston. This extraction eliminates the weak component that was damaged by pressure changes while preserving the essential function of pressure balancing and phase separation.
2Duration of action of stationary object
If a separator piston replaces the air bag, then service life is extended and maintenance frequency is reduced, but a safety valve system is needed to manage excessive pressure
Solution Approach 1:
The safety valve core is merged with the separator piston structure, forming an integrated component. The valve core is directly formed on the piston body, combining the separation function and pressure relief function into a single integrated element, thereby reducing overall system complexity despite adding safety functionality.
Solution Approach 2:
The separator piston with integrated safety valve core provides self-regulating pressure relief. When excessive pressure occurs, the piston automatically moves to open the discharge groove and release pressure without requiring external control systems or additional actuators.
3Stress or pressure
If the separator piston moves freely to balance pressure, then pressure equilibrium is maintained, but uncontrolled movement could cause instability
Solution Approach 1:
The separator piston is designed with dynamic movement capability along the safety valve core, allowing it to adjust its position in response to pressure differential changes. The piston can move freely within limits to maintain pressure balance while the system adapts to varying operating conditions.
Solution Approach 2:
The return spring is pre-installed to provide cushioning and control the piston's movement. The spring ensures the piston returns to its initial position after pressure equalization and prevents excessive or uncontrolled movement, providing stability while maintaining the dynamic pressure-balancing function.
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 system extends the service life of the oil tank, reduces maintenance frequency, and maintains safe operation by effectively managing pressure fluctuations.
Implementation Method 1
both oil and air are capable of entering the oil tank and being used to balance the oil pressure and the atmospheric pressure on either side of the separator piston
Implementation Method 2
a return spring sleeving the safety valve core is provided between the support frame and the separator piston
Implementation Method 3
the oil flows through the oil discharge groove to another side of the separator piston and the oil creating excessive pressure is discharged through the air outlet
Data Source
AI summary
A piston-type oil tank with safety valve have a tank body, a separator piston arranged inside the tank body, and an oil inlet and an air outlet provided at the front and rear ends of the separator piston respectively. The separator piston is arranged with a penetrated safety valve core, a support frame is arranged at the end of the safety valve core facing the air outlet, and a stop plate is provided at the end of the safety valve core facing the oil inlet. An oil discharge groove is provided on the side wall of the safety valve core. When the support frame presses against the end face where the air outlet is located, the oil discharge groove connects the spaces on both sides of the separator piston, and an oil outlet gap is reserved between the support frame and the end face where the air outlet is located.