Press Fitting Sleeve With Profile Recesses For Radial Tolerance Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing press fittings face challenges in achieving reliable pressing results, especially when dealing with radial tolerances, as they often result in inadequate compression of seals, leading to inconsistent sealing performance.
Innovation Solution
The design incorporates profile recesses and support areas on the sleeve, allowing for controlled deformation and compression of seals by adjusting the axial offset of pressing ribs relative to the profile recesses, enabling targeted compression of seals to accommodate varying radial tolerances, and ensuring reliable sealing even with significant radial deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressing ribs are axially aligned directly above sealing grooves, then sealing compression is achieved, but radial tolerances cause inconsistent sealing performance
Solution Approach 1:
adjacent to at least two grooves there is provided a profile recess spaced apart from the respective groove by an axial intermediate area
Solution Approach 2:
The profile recesses act as intermediary elements between the pressing ribs and the sealing grooves. Instead of pressing ribs directly compressing seals, they first press the hollow element wall into profile recesses, creating deformation that propagates through the axial intermediate area to compress the seals. This intermediary mechanism decouples the pressing action from direct seal compression, making the system more tolerant to radial misalignment.
2Reliability
If pressing ribs are offset from profile recesses to accommodate radial tolerances, then sealing reliability improves, but pressing tool complexity increases
Solution Approach 1:
The patent introduces asymmetric positioning between profile recesses and sealing grooves. Profile recesses are positioned at a radial offset from the sealing grooves, creating an asymmetric geometry that intentionally accommodates radial tolerances. This asymmetric design allows the pressing action to be applied at an offset position while still achieving effective seal compression through deformation propagation.
3Reliability
If profile recesses are positioned adjacent to sealing grooves with axial intermediate area, then seal compression is achieved through wall deformation, but sleeve complexity increases
Solution Approach 1:
The sleeve structure is segmented into distinct functional zones: sealing grooves for seal reception, profile recesses for wall deformation, and axial intermediate areas connecting them. This segmentation allows each zone to perform its specific function independently while working together as a system. The axial intermediate area acts as a transition zone that propagates deformation from profile recesses to sealing grooves.
4Reliability
If axial intermediate area is designed with specific radial extent, then deformation propagation to seals is optimized, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies parameter ranges for the axial intermediate area, particularly its radial extent being between the groove radius and the hollow element wall radius. By defining this intermediate parameter range, the design optimizes deformation propagation while accommodating normal manufacturing tolerances. The specific parameter relationships create a robust design that works within typical manufacturing capabilities.
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
This approach ensures consistent and graded compression of seals, optimizing sealing performance across a range of radial tolerances, from 15% to 30%, thereby enhancing the reliability and effectiveness of the press fitting system.
Implementation Method 1
the deformation and flow processes in the wall material that take place when the wall is pressed into the profile recesses also enable the deformation of the seals to be influenced in a favorable manner with regard to radial tolerances
Implementation Method 2
an axial offset between the press rib and the profile recess is thus transformed into a change in the radial compression of the seal, which can be exploited in a targeted manner according to the invention to achieve a graded, d. H. to achieve different degrees of compression of the seals
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a sleeve (1), particularly a press fitting. Said sleeve comprises at least two circumferential grooves (13) for accommodating one respective seal (14), and at least one support zone (12) for radially supporting a hollow element (13) that can be fastened thereto. In order to create a sleeve, particularly a press fitting, which provides for a satisfactory pressing result in the most reliable manner possible while taking into account radial tolerances, one profiled recess (16) is disposed adjacent to each of at least two grooves (13), said profiled recess (16) being spaced apart from the groove (13) by means of an axial intermediate area (15). The greatest radial extension of the intermediate area (15) relative to at least two profiled zones (17) encompassing one respective groove (13), an intermediate area (15), and a profiled recess (16) is greater than the smallest radial extension of the support zone (12). The invention further relates to a combination of a sleeve, especially a press fitting, and a pressing tool comprising a pressing jaw (2).