Valve plate for gas exchange valves
A valve plate ( 1 ) made of fiber-reinforced plastic for gas exchange valves for reciprocating piston compressors comprises at least two concentric sealing rings ( 3 ) which cooperate with corresponding sealing surfaces ( 4 ) at the valve seal ( 5 ) by way of profiled sealing surface ( 2 ) and that are connected by way of radial webs ( 6 ). In order to improve the flexibility of the valve plate ( 1 ) and the sealing behavior, the webs ( 6 ) are designed thinner along the entire radial extent thereof between the sealing rings ( 3 ) on both sides of the valve plate ( 1 ) compared to the adjacent thickness of the sealing rings ( 3 ).
1. A valve plate for use in a gas exchange valve of a reciprocating compressor, said valve plate having a front side and a back side and comprising:
first and second radially-spaced concentric sealing rings which each defines a front face and a back face and a first thickness therebetween, each said front face providing circumferential sealing surfaces, and
a radially-extending web which extends between said first and second concentric sealing rings, said web having a second thickness which is less than said first thickness and defines front and back faces which are recessed relative to the front and back faces of said first and second sealing rings, said back face of said web extending into said first sealing ring to form a recess in the back face of the first sealing ring.
2. The valve plate according to claim 1 , wherein said recess is concave.
3. The valve plate according to claim 1 , including a raised area on the back face of said web.
4. The valve plate according to claim 3 , wherein said raised area is cylindrical.
5. The valve plate according to claim 1 , wherein said back face of said web extends into said second sealing ring to form a recess in the back face of the second sealing ring.
6. The valve plate according to claim 5 , wherein said recess is concave.
7. The valve plate according to claim 5 , including a raised area on the back face of said web.
8. The valve plate according to claim 7 , wherein said raised area is cylindrical.
9. A valve plate for use in a gas exchange valve of a reciprocating compressor, said valve plate having a front side, a back side, a radially inner circumferential surface, and a radially outer circumferential surface, and comprising:
a plurality of radially-spaced concentric sealing rings which each has a front face and a back face and defines a first thickness therebetween, each said front face providing circumferential sealing surfaces, and
a radially-extending web which extends between said concentric sealing rings, said web having a second thickness which is less than said first thickness and defines front and back faces which are recessed relative the front and back faces of each of said plurality of concentric sealing rings,
said back face of said radially-extending web extending from said inner circumferential surface of said plate to said outer circumferential surface and through said sealing rings.