Gas pressure limiting valve for controlling and discharging a gaseous medium

A technology of gas pressure and gaseous medium, which is applied in the field of pressure limiting valves, can solve problems such as component damage, and achieve the effects of reducing wear, reliable sealing, and reducing load

Active Publication Date: 2020-02-07
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Gas pressure limiting valve for controlling and discharging a gaseous medium
  • Gas pressure limiting valve for controlling and discharging a gaseous medium
  • Gas pressure limiting valve for controlling and discharging a gaseous medium

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Embodiment Construction

[0027] according to figure 1 and figure 2 The diagram in FIG. 2 shows an embodiment of a pressure limiting valve 1 , in particular a gaseous pressure limiting valve 1 , for controlling and venting a gaseous medium.

[0028] as from figure 1 It can be seen that the gas pressure limiting valve 1 comprises a housing 7 , a valve element mounting assembly 17 , a sleeve-shaped element 13 supporting the closing spring 8 , in particular a guide element 9 for guiding the closing spring 8 and a closing spring support 11 . Furthermore, the valve element mounting assembly 17 has a sealing seat plate 2 and a valve element 3 , wherein the valve element 3 abuts against the sleeve-shaped element 13 in the direction of the longitudinal axis 14 or, in an alternative embodiment, against the sleeve-shaped element 13 connections. Furthermore, the sleeve-shaped element 13 has at least one channel opening 15 , enabling a gas flow in the direction of the longitudinal axis 14 from the inflow II to...

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Abstract

The invention relates to a gas pressure limiting valve (1) for controlling a gaseous medium, in particular hydrogen, comprising a housing (7) and a valve element assembly (17). The valve element assembly (17) has a valve element (3), which opens and closes, and is thus movable, in the direction of a longitudinal axis (14), and a stationary seal seat plate (2). Either the seal seat plate (2) or thevalve element (3) has a seal seat edge (12) which encircles the longitudinal axis (14) and which forms a seal seat (6) together with the respective other component in the closed state of the valve (1). The gas pressure limiting valve also comprises a closing spring (8) which is arranged in the housing (7) in the direction of the longitudinal axis (14), and the closing spring (8) is supported against a closing spring support (11) on one side in the direction of longitudinal axis (14) and at least indirectly against the valve element (3) on the opposite side. According to the invention, the valve element (3) or the seal seat plate (2) has an elastomer coating (4) such that the elastomer coating (4) forms the seal seat (6) together with the seal seat edge (12) of either the seal seat plate (2) or the valve element (3) in the closed state of the valve (1); the seal seat plate (2) or the valve element (3) has a circumferential stop (5); and the penetration depth of the circumferential sealseat edge (12) into the elastomer coating (4) is limited in the direction of longitudinal axis (14) by the circumferential stop (5).

Description

technical field [0001] The invention relates to a pressure limiting valve, in particular a gaseous pressure limiting valve, for controlling and venting a gaseous medium, especially hydrogen, with a valve element assembly, in particular for use in vehicles with a fuel cell drive. Background technique [0002] In the field of vehicles, besides liquid fuels, gaseous fuels will also become more and more important in the future. Especially in vehicles with fuel cell drives, the hydrogen flow must be controlled. Here, the gas flow is no longer controlled discontinuously as in the case of liquid fuel injection, but gas is drawn from at least one high-pressure tank and conducted via the inflow line of the medium-pressure line system to the injector unit. The injector unit conducts the gas to the fuel cell via the connecting lines of the low-pressure line system. [0003] From DE 10 2013 204 563 A1 a pressure limiting valve is known which has a housing and a valve element mounting,...

Claims

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Application Information

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IPC IPC(8): F16K17/04F16K1/42F02M63/00F02M21/02
CPCF16K17/0426F16K17/0466F02M21/0239
Inventor H-C·马格尔
Owner ROBERT BOSCH GMBH
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