Accumulator Piston Head Pressure-Relief Grooves for Wear Reduction
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Solution Overview
Problem
Hydromechanical spring-loaded drives for high-voltage power switches experience wear on accumulator piston heads, leading to unbalanced pressure fields, non-uniform wear, and increased hydraulic flow losses, which can cause leakage and damage to other components due to abrasive particles.
Innovation Solution
Incorporating pressure-relief grooves on the accumulator piston head to equalize pressure and prevent wear, ensuring consistent stroke-dependent throttling and reduced friction, thereby maintaining the accumulator module's performance over its lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the accumulator piston head is used without pressure-relief grooves, then the structure is simpler, but unbalanced pressure fields cause non-uniform wear and abrasive particle formation
Solution Approach 1:
The piston head surface is segmented into multiple pressure zones separated by radial grooves. These grooves divide the contact surface into distinct segments that can equalize pressure independently, preventing unbalanced pressure fields while maintaining overall structural simplicity.
Solution Approach 2:
Pressure-relief grooves are introduced as intermediary features on the piston head surface. These grooves act as pressure equalization channels that mediate between high-pressure and low-pressure zones, preventing direct contact between unbalanced pressure fields and the seal interface.
2Manufacturing precision
If pressure-relief grooves are added to the accumulator piston head, then wear is reduced and pressure is equalized, but the manufacturing complexity increases
Solution Approach 1:
The grooves are designed with specific parameter ranges (depth, width, spacing) that optimize pressure equalization while remaining compatible with standard manufacturing processes. The parameters are chosen to achieve the desired pressure distribution uniformity without requiring ultra-precise or complex manufacturing methods.
3Loss of energy
If the accumulator piston operates without pressure equalization, then the device structure is simpler, but hydraulic flow losses increase due to non-uniform wear
Solution Approach 1:
The pressure-relief grooves enable the piston head to self-equalize pressure during operation. The grooves automatically balance pressure distribution as the piston moves, eliminating the need for external control mechanisms and reducing hydraulic flow losses through wear prevention without adding complex active systems.
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 pressure-relief grooves reduce wear on the accumulator piston head, prevent abrasive particle formation, and maintain consistent hydraulic flow losses, reducing the risk of leakage and damage to other components, ensuring reliable operation of the spring-loaded drive.
Implementation Method 1
Incorporating pressure-relief grooves on the accumulator piston head to equalize pressure and prevent wear
Implementation Method 2
The highly pressurized fluid that is present in the accumulator modules is conveyed in the direction of the central piston on account thereof, where said fluid reinforces the movement of the piston away from the power switch
Implementation Method 3
The central piston/cylinder assembly is surrounded by a laminated disk spring which is clamped between a thrust collar that is movable axially in relation to the cylinder and a fixedly disposed support collar
Data Source
AI summary
The invention relates to an accumulator module for a hydromechanical spring-loaded drive, wherein the spring-loaded drive is provided to actuate a high-voltage power switch (12), and wherein the accumulator module contains a pressure-tight housing (1), an accumulator piston (2) which protrudes into the housing (1) and is axially moveable in the housing (1), and a sealing cover (4) which seals the housing in an pressure-tight manner. In addition, at least one connecting channel (5, 6) is provided, which is introduced into the housing (1) for transporting a highly pressurised fluid present between the inner wall (7) of the housing and the head (3) of the accumulator piston to a high-pressure channel (11) of the spring-loaded drive, which channel is outside the housing. In order to increase the service life of the accumulator module, at least one pressure relief groove (8) is circumferentially applied to the head (3) of the accumulator piston.