SU1560843A1 - Arrangement for reversing a fluid flow - Google Patents

Abstract

The invention relates to the field of hydraulic engineering, in particular to movers that provide reversal of flow at a constant direction of rotation of the shaft. The aim of the invention is to simplify the device. This is achieved by the fact that the mechanism for reversing the flow in a device with a paddle impeller is made in the form of a controllable element installed on the suction side with the possibility of blocking the end surface of the impeller. The controlled element can be made in the form of a solid disk moving in the axial direction or in the form of a movable plate mounted on the disk, which in this case is fixed in the axial direction relative to the impeller shaft. 4 hp f-ly, 3 ill.

Description

The invention relates to aero hydraulic engineering, in particular to movers that provide reversal of flow with a constant direction of rotation of the shaft.

The aim of the invention is to simplify the device.

FIG. 1 shows the structural scheme of the proposed device with a movable disk; in fig. 2 shows an embodiment of the device with a rectangular plate mounted for radial movement with respect to the disk; in fig. 3 - a version with a plate installed with the possibility of angular movement.

The device (Fig. 1) comprises an impeller 1 with blades 2 mounted on a shaft 3, the axis of which coincides with the direction of flow. A disk 4 is installed on the shaft 3 for axial displacement; its diameter is larger than the diameter of the impeller 1.

In another embodiment (Fig. 2), the shaft 3 has the ability only of angular movement relative to the disk 4 and is fixed in the axial direction. On disk

4, with the possibility of radial movement, a rectangular plate 5 is installed, the height of which is equal to the distance between the disk 4 and the impeller 1, and the length is not less than 1/3 of the circumference describing the impeller 1.

In the embodiment shown in FIG. 3, plate 5 is mounted on a disk with the possibility of angular movement.

In all versions, the disk 4 or plate 5 together with the disk 4 in one of the extreme positions overlaps the end surface of the impeller 1, the suction side of which faces the disk 4. The disk 4 or plate 5 with the disk 4 together with the drive of their movement (not shown) form a mechanism for reversing the flow.

When the device is in operation, the shaft 3 drives the impeller 1 into rotation, and its blades 2 drive the medium in which the impeller 2 is freely immersed. In one of the extreme positions of the reversing mechanism, the flow access to the suction side of the impeller 1 is free, in the other - it is blocked, and the impeller 1

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F

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00 4

WITH

It functions practically only due to the centrifugal effect, creating a vacuum from the output edges of the blades 2, mainly in the axial zone.

Thus, not changing the direction of rotation by moving the disk 4 {fig. 1) or plates 5 (FIGS. 2 and 3) change the direction of flow from disk 4 with free access to the suction side of the impeller 1 or disk 4 when such access is blocked.

Claims (5)

1. A device for reversing fluid flow, comprising a shaft whose axis coincides with the direction of flow, an impeller with blades placed on the shaft, and a mechanism for reversing flow with a constant direction of rotation of the shaft, characterized in that the reversal is made in the form of a controllable element installed on the suction side of the impeller with the possibility of overlapping its end surface. 2. The device according to claim 1, characterized in that the controlled element is made in the form of a solid disk coaxially with the impeller and equipped with a drive of translational movement, and the diameter of the disk is chosen larger than the diameter of the impeller 3. The device according to claim 1, characterized in that the controllable element is designed as a rectangular plate mounted on a solid disk with the possibility of relative movement, the shaft being installed coaxially with the disk so as to rotate relative to the disk and fixed in the axial direction, and the diameter disk selected greater than the diameter of the impeller, the plate height is chosen equal to the distance between the disk and the impeller, and the length is not less than 1/3 the length of the circle describing the impeller. 4. The device according to claim 3, characterized in that the plate is mounted with the possibility of radial movement relative to the disk. 5. A device of Claim 3, characterized in that the plate is installed with the possibility 5 angular displacement relative to the disk 0 FIG. 7 7 Fig 2 Fig