Hydraulic Accumulator Bladder One-Step Vulcanization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing rubber accumulator bladders have limitations in energy accumulation, thermal expansion compensation, hydraulic impact absorption, pulsation elimination, and noise reduction due to small volume change and internal stress concentration during formation, leading to insufficient pressure pulsation absorption, short service life, and poor gas sealing performance.
Innovation Solution
A method for manufacturing an integrated hydraulic accumulator bladder through one-step vulcanization, where a rubber sheet is bonded to a gas-filled bladder, vulcanized, and then cooled to form a bladder with uniform thickness and improved sealing, enhancing gas retention and pressure stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If an internal core mold is used for bladder formation, then the bladder can be formed in volume and shape, but internal stress concentration occurs during formation
Solution Approach 1:
The patent applies preliminary action by pre-heating the rubber sheet to 40-60°C before forming, which increases the material's plasticity and allows it to conform to the mold cavity without excessive stress concentration. This preliminary thermal preparation enables the rubber to flow more easily into the desired bladder shape while reducing peak stresses during the forming operation.
2Ease of manufacture
If separated vulcanization is used after formation, then the process can be completed in stages, but the volume change is small and pressure pulsation cannot be effectively absorbed
Solution Approach 1:
The patent merges the forming and vulcanization operations into a single integrated process step. The rubber sheet is formed into the bladder shape within the mold cavity and then vulcanized in-situ without removal or intermediate handling. This combination allows the bladder to achieve both its final shape and optimal elastic properties simultaneously, enabling greater volume change capability for pressure pulsation absorption.
3Volume of moving object
If the rubber bladder has small volume ratio before and after pressurization, then the structure remains compact, but energy accumulation and thermal expansion compensation are insufficient
Solution Approach 1:
The patent changes the physical parameters of the rubber material through controlled pre-heating and optimized vulcanization conditions. By heating the rubber to 40-60°C before forming and maintaining specific temperature and pressure conditions during vulcanization, the material achieves enhanced elasticity and extensibility. This allows the bladder to expand to a larger volume ratio (greater than 2:1) when pressurized, significantly improving energy accumulation capability while maintaining compact dimensions in the unpressurized state.
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 method results in a bladder with improved energy accumulation, extended service life, enhanced gas sealing, and reduced pressure fluctuations, offering better shock absorption and noise reduction with a simplified manufacturing process.
Implementation Method 1
placing the bladder blank in a vulcanization device for vulcanization to form an initial bladder product
Implementation Method 2
the bladder will be deformed with the extrusion of the hydraulic oil, thereby compressing the nitrogen to accumulate energy
Data Source
AI summary
A method for manufacturing a hydraulic accumulator bladder includes the following steps: bonding a rubber sheet to the gas-filled air bladder to form a bladder blank; placing the bladder blank in a vulcanization device for vulcanization to form an initial bladder product; and releasing the gas in the gas-filled air bladder of the initial bladder product, taking the air bladder out, and naturally cooling the initial bladder product to a room temperature to form a finished bladder product. The bladder manufactured by the manufacturing method is integrally formed by one-step vulcanization, and has the advantages of uniform wall thickness, smooth inner and outer surfaces, long fatigue lifetime, a simplified process, high quality and good stability.