SU436422A1 - ELECTROMAGNETIC PUMP - Google Patents

Description

one

The invention is intended to pump electrically conductive media by an electromagnetic method.

Electromagnetic devices are known, for example, linear induction electromagnetic pumps that convert electrical energy into mechanical energy.

The disadvantage of such devices is the presence of significant inhomogeneities of the electric and magnetic fields, as well as the corresponding volume and surface forces in the active volume of the channel, which leads to the occurrence of closed medium flows in the active volume, especially under operating conditions close to a short circuit, which turn reduces efficiency the pump. The presence of side closures and longitudinal barriers in the channel reduces the harmful effect, but does not eliminate it completely.

To increase the efficiency The proposed pump is equipped with a pressure equalization system between the channels, including throttling bodies located at the outlet of each of the channels, except for the central one, and means for controlling them.

In addition, to perform automatic pressure equalization in any mode of operation, throttling elements are made in the form of devices comparing

pressure at the outlet of the channel with the pressure at the outlet of the pump.

FIG. 1 shows the proposed pump; in fig. 2 - controlled choke.

Between the flat inductors 1 there is a metal pipe 2 with electrically conductive partitions 3 and lateral electrically conductive women 4, leveling the current density distribution across the channel width. Controlled chokes 5 are located at the exit from the channel core. The pump works as follows. After the conduit 2 is filled with an electrically conductive medium and the inductors 1 are turned on, the pump creates a pressure differential between the outlet and the inlet. Due to the non-uniform distribution of the magnetic and electric fields in the core of the pump channel, the volume and surface forces (pressure) decrease in the direction from the channel axis to the periphery.

Depending on the pressure differential developed in each part of the channel formed by the walls of the metal conduit 2 and the bulkheads 3, the controlled chokes located at the channel exit are throttled so that the pressure in each channel part is equal to the pressure on the channel axis where the throttle is not positioned. Medium flow through each

part of the channel will decrease from the axis to the periphery, but there will be no reverse flow.

Drossel control can be carried out either externally by a special system or automatically.

FIG. Figure 2 shows one of the controlled choke variants. Chamber 6 is hermetically connected to the wall of the metal pipe 2 at the outlet from the active zone behind the inductor 1. The piston 7 divides the cavity of the chamber 6 into two parts. The lower part of the chamber is connected by a hole 8 to the channel, the upper part of the chamber is connected by pipe 9 in the first case to the control system, in the second - to the central part of the output collector of the metal pipe 2. The valve 10 is rigidly connected to the piston 7 and inserted into the channel through the slot.

The piston 7 with the valve 10 moves across the channel until the pressure in both cavities of the chamber 6 is equalized.

The self-oscillating mode of operation of the chokes is eliminated due to the fact that the cross-sections of the hole 8 and the pipeline 9 are significantly smaller than the cross-section of the chamber 6.

Controlled chokes can be located on both sides of the metal conduit 2.

The shape of the channel of the induction electromagnetic pump can be any: rectangular, coaxial, disk, etc. However, in any of these cases, the partitions should be located along the flow of the pumped medium.

Subject invention

Claims (2)

1. Electromagnetic pump consisting of a metal conductor with electrically conductive longitudinal partitions forming channels, an inductor of a longitudinal running magnetic field, characterized in that it is equipped with a pressure equalization system between the channels, including throttling organs located at the exit of each channel, except for the central one, and means of controlling them. 2. The device according to claim 1, characterized in that, in order to implement automatic pressure equalization in any mode of operation, the throttling bodies are made in the form of devices comparing the pressure at the outlet of the channel with the pressure at the outlet of the pump.