DEVICE FOR INCREASING STABILITY OF OPERATION OF RADIAL-AXIAL HYDROTURBINE

摘要

1. A device for increasing the stability of the operation of a radial-axial hydraulic turbine, including a bypass channel made along the axis of the impeller of the radial-axial hydraulic turbine, communicated at the outlet with the space behind the outlet cut of the impeller blades of the radial-axial hydraulic turbine, characterized in that the impeller is equipped with a fixed on impeller hub and located in the space behind the trailing edges of the impeller blades coaxially with the latter tapering in the direction of the suction pipe and made with an axisymmetric fairing, the outlet section of which is located in the area of the inlet section of the suction pipe, the bypass channel is made in the fairing and communicated from the inlet side with the suction pipe, and from the outlet side, the bypass channel communicates with the space behind the outlet cut of the impeller blades of the radial-axial hydraulic turbine through outlet channels made in the radial in the radial direction. 2. The device according to claim 1, characterized in that the outlet section of each outlet channel is located in a recess made in the fairing to form a visor over the outlet section of each outlet channel. The device according to claim 1, characterized in that additional inlet channels are made in the fairing, communicated with the bypass channel, located in the area of the inlet section of the suction pipe. The device according to claim 3, characterized in that steps are made in the fairing from the side of the entrance to the additional inlet channels. The device according to claim 1, characterized in that a compressed air supply channel is made in the fairing, communicated from the inlet side through a working stake made in the bushing