Valve device
A valve device includes a housing, a flow duct and a valve body. The valve body is arranged in the flow duct and has a sealing section that bears against a housing-side sealing seat when the valve device is closed. The sealing section and the sealing seat together form a sealing region. There is a collapse zone immediately upstream of the sealing region in the flow duct when the valve device is closed. The collapse zone is delimited by a boundary wall that is at least substantially perpendicular with respect to a movement axis of the valve body and by a deflector wall that is arranged at an angle with respect to the boundary wall. The boundary wall is longer than the deflector wall.
1. A valve device, comprising:
a housing;
a flow duct;
a valve body arranged in the flow duct, the valve body having a sealing section configured to bear against a housing-side sealing seat when the valve device is closed;
a guide element connected to the housing and configured to guide the valve body along a movement axis of the valve body; and
a housing insert fixedly connected to the housing,
wherein:
the sealing section and the sealing seat together form a sealing region,
a decaying space is defined in the flow duct immediately upstream of the sealing region when the valve device is closed,
the decaying space is delimited by a boundary wall, which is at least substantially perpendicular with respect to a movement axis of the valve body and by a deflector wall which is arranged at an angle with respect to the boundary wall,
the boundary wall is longer than the deflector wall,
the sealing seat is adjoined on a side opposite the boundary wall by a flow guiding face, which is at least partially inclined in relation to a fluid flow direction prevailing in the sealing region when the valve device is open,
the defector wall, the sealing seat and the flow guiding face together form a housing-side projection, and
the flow duct, the decaying space, and the sealing seat are all defined by the housing insert.
2. The valve device as claimed in claim 1 , wherein the boundary wall is at least 1 mm longer than the deflector wall.
3. The valve device as claimed in claim 1 , wherein the boundary wall is longer than the deflector wall by a factor of at least 1.2.
4. The valve device as claimed in claim 1 , wherein the boundary wall is annular disk-shaped.
5. The valve device as claimed in claim 1 , wherein the deflector wall is hollow-cylindrical.
6. The valve device as claimed in claim 1 , wherein the flow guiding face is inclined in relation to the fluid flow direction by at least 10°.
7. The valve device as claimed in claim 1 , wherein the flow guiding face is inclined in relation to the fluid flow direction by at most 90°.
8. A high pressure pump of a fuel system of an internal combustion engine, the high pressure pump comprising:
an outlet valve for discharging fuel from a delivery space of the high pressure pump, the outlet valve configured as a valve device, including:
a housing;
a flow duct;
a valve body arranged in the flow duct, the valve body having a sealing section configured to bear against a housing-side sealing seat when the valve device is closed;
a guide element connected to the housing and configured to guide the valve body along a movement axis of the valve body; and
a housing insert fixedly connected to the housing,
wherein:
the sealing section and the sealing seat together form a sealing region,
a decaying space is defined in the flow duct immediately upstream of the sealing region when the valve device is closed,
the decaying space is delimited by a boundary wall, which is at least substantially perpendicular with respect to the movement axis of the valve body, and by a deflector wall, which is arranged at an angle with respect to the boundary wall,
the boundary wall is longer than the deflector wall,
the sealing seat is adjoined on a side opposite the boundary wall by a flow guiding face, which is at least partially inclined in relation to a fluid flow direction prevailing in the sealing region when the valve device is open,
the defector wall, the sealing seat and the flow guiding face together form a housing-side projection, and
the flow duct, the decaying space, and the sealing seat are all defined by the housing insert.
9. The valve device as claimed in claim 2 , wherein the boundary wall is at least 2 mm longer than the deflector wall.
10. The valve device as claimed in claim 2 , wherein the boundary wall is at least 3 mm longer than the deflector wall.
11. The valve device as claimed in claim 3 , wherein the boundary wall is longer than the deflector wall by a factor of at least 1.5.
12. The valve device as claimed in claim 4 , wherein the boundary wall is concentric with respect to the movement axis of the valve body.
13. The valve device as claimed in claim 5 , wherein the deflector wall is concentric with respect to the movement axis of the valve body.
14. The valve device as claimed in claim 6 , wherein the flow guiding face is inclined in relation to the fluid flow direction by at least 20°.
15. The valve device as claimed in claim 7 , wherein the flow guiding face is inclined in relation to the fluid flow direction by at most 70°.
16. The valve device as claimed in claim 1 , wherein the housing, housing insert, and guide element are separate structures.