THROTTLING DEVICE Russian patent published in 1995 - IPC

FIELD: control systems of production processes. SUBSTANCE: mounted in housing provided with inlet and outlet holes is throttling member made in form of shaft with bead and through- way hole and holder embracing it; holder has through-way passages which are brought in communication with holes of shaft. Thrust bush of holder is located between ends of holder and housing. Through-way passages of holder are of varying section lengthwise widening towards inlet and outlet holes. Sections of through-way passage of holder adjoining housing correspond to form and sizes of inlet and outlet holes respectively. Sections of through-way passage of holder adjoining shaft correspond to form and sizes of its through-way hole. Thrust bush of shaft made of material with low friction coefficient is mounted coaxially relative to thrust bush of holder and is supported by end of housing and bead of shaft. Width of bead is equal to difference of heights of bushes. EFFECT: enhanced reliability. 4 cl, 3 dwg