Connecting system

Abstract

The invention relates to a connecting system for lines, fittings or assemblies, which are designed for guiding a fluid pressurized with a pressure (p1) greater than a reference pressure (p2). The system comprises a first and a second coupling part (1, 2) as well as a peripheral packing (3) placed in a groove (4), which is peripherally formed in one of the two coupling parts (1, 2) and comprises a slot bottom (4a) as well as slot flanks (4b, 4c). When in an operational state, the packing (3) occupies a position in the groove (4) in which, while deforming and generating a radial initial compressing force (FV), it seals a gap (7) of the location opening (6), and the packing rests against the coupling parts (1, 2) over a contact length (KL) extending in an axial direction (X-X). In order to obtain a high functional reliably while ensuring that only a small amount of fluid can pass through the packing (3), and to obtain an improved ease of assembly during the production of the coupling connection, the invention provides that means (4a, 4d, 4e, 13) for mechanically preventing an axial movement of the peripheral packing (3) are placed inside the groove (4). These means are designed in such a manner that when one coupling part (2) is inserted inside the other coupling part (1) and in the event of a back motion in the opposite direction, the seal (3) is held in the position in which the packing (3) seals the gap (7) of the location opening (6).

Description

technical field [0001] The invention relates to a connection system for pipes, fittings or components of a system for conducting a fluid, in particular carbon dioxide, to which a pressure higher than a reference pressure is applied. Background technique [0002] In a motor vehicle, the system for conducting the pressurized fluid can be, for example, the cooling circuit of the air-conditioning system. In such systems, various halogen-hydrocarbons such as the known coolant called R134a, consisting essentially of polytetrafluoroethylene, have hitherto been used. Since all organics are gas permeable, despite the use of seals it is still unavoidable (mainly due to permeation of the perimeter seals) that a certain amount of coolant flows from the higher pressure space to the lower pressure space. Among them, the amount of leakage caused by penetration is determined by the operating conditions such as pressure and temperature, the permeability of the elastic seal used and the geom...

AI Technical Summary

Problems solved by technology

This in turn has the detrimental consequence of creating an undesirably large permeate exit area and increasing the permeate

[0007] In detail, there is the following problem: When the connectors of the above-mentioned system are plugged in, due to tolerance reasons, a set on one of the two connectors The locking part on the connecting part must engage with a certain play in a corresponding profile provided on the other connecting part

[0008] It is well known that in principle there are various factors acting on peripheral seals such as O-rings, which are considered to have an impact on frictional conditions such as those presented above However, a careful analysis of these influencing factors shows that (especially when the connection with a small penetration of the connector is the premise that must be guaranteed) these factors that affect the friction are basically unchangeable, or have only a small change, which does not contribute to the above-mentioned problem solving

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