Check valve arrangement and motor vehicle vacuum pump

Abstract

The invention is directed to a check valve arrangement (10) comprising - a valve housing (12) radially defining a valve body chamber (24), - a valve seat (14) being located at a first axial end (28) of the valve body chamber (24) and radially surrounding a valve inlet opening (26), - a valve travel limiter (16) being located at a valve-seat-remote second axial end (36) of the valve body chamber (24), and - a disc-shaped valve body (18) being loosely arranged within the valve body chamber (24), - wherein the valve travel limiter (16) is provided with a support ring (30) being fixed to the valve housing (12), a central transversal platform structure (32) axially protruding from a valve-seat-facing side of the support ring (30), and a platform frame (34) axially connecting the transversal platform structure (32) with the support ring (30), wherein the platform frame (34) is provided with at least one radial frame opening (52). Because of the loosely arranged valve body (18), only a low actuation force is required to open the check valve arrangement (10). The valve travel limiter (16) with the axially protruding platform structure (32) avoids a canting or jamming of the valve body (18) and also allows a relatively high fluid throughput in the forward flow direction (F). The invention is also directed to a motor vehicle vacuum pump provided with such a check valve arrangement.

Description

technical field [0001] The present invention relates to a check valve device, in particular to a check valve device provided with a disc-shaped valve body. The invention also relates to a motor vehicle vacuum pump provided with such a non-return valve arrangement. Background technique [0002] WO 2017 / 036548 A1 discloses a motor vehicle vacuum pump provided with a non-return valve arrangement arranged in the suction port of the vacuum pump. The disclosed check valve device is provided with a valve housing radially defining a valve body chamber. The check valve device includes an annular shaped valve seat portion at a first axial end of the valve body chamber radially surrounding the valve inlet opening. The check valve device further includes an annular-shaped valve stroke limiter at a second axial end of the valve body chamber remote from the valve seat portion. The check valve device also includes a disc-shaped valve body disposed within the valve body chamber. The val...

AI Technical Summary

Problems solved by technology

The non-return valve arrangements disclosed in EP 1927786 B1 and DE 102012200492 A1 also only provide relatively low effective flow cross-sections, so that the non-return valve arrangements only allow a relatively low fluid throughput in the open position

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