Abstract: An electric pulse tube expander for a bed with a vertical guide and horizontal guides mounted thereon. An electrode is movably mounted on the vertical guide. Mounted on the horizontal guides are drives for moving the electrode in vertical and horizontal planes. The drives include electric motors, reducers and mechanisms for setting the distance of movement of the electrode. Each of the mechanisms comprises a reducer whose drive gear is kinematically coupled to a lead screw, whereas its driven gear has an arm affixed to, and extending from, its shaft. The arm periodically interacts with a limit switch of a tube expander control system.

Abstract: Each one of the plates made as a truncated cone, of which the separator rotor pack is assembled, is provided with radial projections over the entire circumference of the plate outer flange. The plates are arranged in the pack one on top of the other such that said projections are matched over the pack generatrices. The shape and dimensions of said projections are such as to ensure local overlapping of the axial gap between adjacent plates. Provided between the projections are recesses which, taken together, form a group of channels running parallel with the separator rotor axis and designed for the slowed-down passage of suspension flows being separated, this serving to preclude the washout of the precipitate sliding off the plates into the slime space.