20-08-2014 дата публикации
Номер: CN103994242A
Принадлежит:
The invention relates to an axial sealing structure of a control valve. The axial sealing structure comprises an upper sleeve (1), a lower sleeve (4) and a valve core (2), and is characterized in that one side, close to the valve core (2), of the lower end face of the upper sleeve (1) is provided with a first annular boss, the upper end face of the lower sleeve (4) is clamped to the annular boss, a second annular boss is arranged on the inner wall, beside the upper end face, of the lower sleeve (4), and the second annular boss and the first annular boss make contact with the valve core (2), so that a sealing cavity is formed, an annular metal sealing ring (3) is installed in the sealing cavity, the cross section of the metal sealing ring (3) is in a semi-arc shape, and the opening of the semi-arc faces downwards. After the trial use, it is proved that after the sealing structure is adopted for an APM high pressure balanced type control valve, the effect of sealing between the valve core ...
Подробнее