Steam valve and steam turbine
AssigneeMitsubishi Heavy Industries Compressor Corporation
InventorYasuhiko KAWAMURA
Life of this patent
Estimating the term…
Abstract
A steam valve includes a valve body having a valve seat in a steam channel, a valve stem configured to close the steam channel by coming in contact with the valve seat and to open the steam channel by moving from the valve seat and a guide portion configured to slidably guide the valve stem in a moving direction thereof. The guide portion has a guide body that encloses the valve stem from a radial outer side of the valve stem and a guide bush that is detachably fixed inside the guide body, has an inner surface which abuts and slides on an outer circumferential surface of the valve stem, and is formed of a material having corrosion resistance.
Claims5
1-5. (canceled)
A steam valve comprising:
- a valve body including a valve seat in a steam channel;
- a valve stem configured to move the valve body that closes the steam channel by coming into contact with the valve seat and that opens the steam channel by coming out of contact with the valve seat;
- and
- a guide portion configured to slidably guide the valve stem in a moving direction thereof,
- wherein the guide portion comprises:
- a guide body that encloses the valve stem from a radial outer side of the valve stem;
- a guide bush that is detachably attached inside the guide body, has an inner surface which abuts and slides on an outer circumferential surface of the valve stem, and is formed of a material having corrosion resistance;
- and
- a steam valve spring which extends in the moving direction, one end of which is fixed to the valve stem, an other end of which comes into contact with the guide body, and which biases the valve stem in a direction in which the valve stem is brought into contact with the valve seat, and
- the guide body is formed of a metal having a higher modulus of rigidity than the guide bush.
Dependencies are inferred from the claim text.