Hydraulic Accumulator Shell Joint to Prevent Membrane Damage
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Solution Overview
Problem
Hydraulic accumulators face membrane damage during the welding process of housing shells, which affects the stability and integrity of the membrane.
Innovation Solution
A form-fitting connection is created between the housing shells with a reshaped opening edge of the radially outer shell forming a positive fit with the radially inner shell, and a U-shaped clamping ring or C-shaped hollow profile holds the membrane's edge bead, preventing damage and ensuring a sealing and anchoring mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If housing shells are welded together using various welding processes, then the housing shells are joined securely, but hot metal beads or metal particles may damage the membrane during welding
Solution Approach 1:
The housing is divided into two separate shells that are joined together, with the membrane positioned between them. The membrane is secured to one shell while the other shell is attached, preventing direct exposure to welding heat and metal particles.
Solution Approach 2:
The membrane itself acts as an intermediary element between the two housing shells. By securing the membrane to one shell first, it serves as a protective barrier during the attachment process of the second shell, shielding it from harmful welding effects.
2Stability of the object's composition
If the membrane is secured to housing shells during assembly, then the membrane is held in place, but the membrane may be damaged by hot metal beads or particles during welding
Solution Approach 1:
The membrane is secured to the first housing shell before the second shell is attached. This preliminary action ensures the membrane is properly positioned and protected before the welding process begins, preventing damage from hot metal beads or particles.
Solution Approach 2:
By securing the membrane to one shell in advance, a protective arrangement is created that cushions the membrane from harmful effects during subsequent assembly operations, particularly welding of the second shell.
3Strength
If housing shells are joined by welding, then a secure connection is achieved, but the complexity of the manufacturing process increases due to potential membrane damage risks
Solution Approach 1:
The assembly process is segmented into distinct steps: first securing the membrane to one shell, then attaching the second shell. This segmentation simplifies the overall process by breaking it into manageable stages with clear protective measures at each step.
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 prevents membrane damage during assembly, ensures a secure sealing, and allows for efficient stress transmission between housing shells, enhancing the hydraulic accumulator's stability and operational performance.
Implementation Method 1
an opening edge of the radially outer housing shell at the overlapping point is applied by reshaping to the circumference of the radially inner housing shell, forming a positive fit
Implementation Method 2
the membrane separates a liquid space as a working space from a gas space as a further working space
Implementation Method 3
When the pressure drops, the previously compressed gas expands again, pushing the pressure medium (hydraulic fluid) back into the hydraulic circuit
Data Source
Figure 1
Figure 2
AI summary
A hydraulic accumulator comprises a first housing shell (2) and a second housing shell (3), the opening edges (5, 6) of which overlap in relation to the longitudinal axis (4) of the hydraulic accumulator (1) in such a way that they define a partial volume of the hydraulic accumulator (1). The accumulator further comprises a separating element (7) which separates inner working chambers (9, 10) from each other within the accumulator housing (8) of the hydraulic accumulator (1) in a medium-tight manner, said housing being formed by the housing shells (2, 3), and wherein the opening edge (5) of the radially outer-lying housing shell (2) is positively coupled to the circumference of the radially inner-lying housing shell (3) by means of reshaping.