FIELD: machine building.
SUBSTANCE: distributing valve (10) with valve element (12) opening and closing seat (28), interacting with valve part (22) of distributing valve (10), which releases pressure from high pressure chamber (26) that is under the pressure prevailing in the system and to which seat (28) corresponds or supplies pressure. Surface (44) restricting the seat and restricted with edge (40) that restricts the seat passes on seat (28) between valve element (12) and valve part (22). Surface (44) restricting the seat is made on valve part (22). Edge (40) restricting the seat restricts cavity (46) on valve part (22), which restricts the contact surface. Some part of contact surface (30) is provided with protective wear-resistant coating (60). Cavity (46) restricting the contact surface separates some part of contact surface (30) with protective wear-resistant coating (60) from part (64) that does not have such a coating.
EFFECT: simpler manufacture and higher manufacturing accuracy of the valve edge restricting the seat, and improved wear resistance of the seat as a whole.
6 cl, 4 dwg
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RU2505701C9 |
