SU937778A1 - Sealed electrically driven pump - Google Patents

Description

(5) HERMETIC ELECTRIC PUMP

one

The invention relates to hydraulic engineering, more specifically to the design of sealed electric pumps equipped with gas removal devices.

A hermetic electropump is known, comprising a housing with a lid and a rotor with a core (placed in the rotor cavity of the housing) with a core (the fifth channel for draining liquid tl.

A disadvantage of the known electric pump is the difficulty of evacuating the gas from the rotor cavity.

Closest to the invention in its technical essence and the achieved effect is a hermetic electropump comprising a housing with a lid equipped with a central protrusion and a rotor placed in the rotor cavity of the housing of the rotor with an axial fluid outlet channel and a central bore in which the protrusion of the lid 2 is located.

A disadvantage of the known construction is a decrease in the reliability of the electropump, caused by the difficulty of removing gases from the upper part of the rotor cavity.

The purpose of the invention is to increase reliability by venting gases from the rotor cavity.

The goal is achieved by the fact that the bore and the protrusion are made conical and form an annular nozzle, and in the lid there is a channel that informs the upper part of the rotor cavity with the boring one.

In addition, on the wall of the bore there is a screw groove directed opposite to the direction of rotation of the rotor.

The drawing shows schematically the 20 part of the electric pump, a longitudinal section.

Sealed electric pump includes a housing 1 with a lid 2, provided with a central protrusion 3, and placed 8 rotor cavities k of the housing 1 rotor 5 with an axial channel 6 for draining fluid and a central bore 7, which houses the protrusion 3 (pins 2. Boring 7 and the protrusion 3 The cone is formed cone and form an annular nozzle 8, and in the cover 2 a channel 9 is made, which communicates the upper part of the rotor groove with the boring 7. On the wall of the boring 7 there is a screw groove 10, which is opposite to the direction of rotation of the rotor 5. The electric pump works as follows When the rotor rotates 5, the cavity k enters the liquid from the area for the inlet of the main impeller or the inpeller of the autonomous circuit. (not shown). Then drain the liquid through the annular nozzle 8 formed by the bore 7 and the protrusion 3 and the canal 6 For example, in the suction area {: of the working wheel. Removal of the gas-liquid mixture accumulating in the upper part of the rotor cavity k

through channel 9 connected to the underpressure region of annular nozzle 8.

A screw groove 10, formed on the wall of the bore 7 and directed opposite to the direction of rotation of the rotor 5, twists the flow of fluid passing through the annular cone 8, the hydraulic resistance at

Sources of information taken into account in the examination

1. Sinev N.M., Udovichenko P.M. Sealless water pumps, M., Atomizdat, 1972, p. 287, FIG. i, 23.

2. Burenin B.8. et al., Construction and Operation of Centrifugal Sealed Pumps, M., Mashinostroenie, 1977, p. 111, FIG. 90. This increases and the efficiency of gas suction increases. .

Claims (2)

 Claims 1. A sealed electric pump comprising a housing with a lid fitted with a central protrusion and a rotor with an axial channel for draining the liquid and a central bore accommodating the lug protrusion located in the rotor cavity of the housing, in order to increase reliability by removing gases from the rotor cavity, the bore and the protrusion are made conical and form an annular nozzle, and in the lid there is a channel that informs the upper part of the rotor cavity with the bore, 2. The electric pump of claim 1, wherein the screw groove is made on the wall of the bore and is directed opposite to the direction of rotation of the rotor.