SU1497392A1 - Diffusion pump - Google Patents

Abstract

The invention reduces operating costs. In the housing 1 with the suction and discharge nozzles 2,3 are located along the axis of the steam lines 4 with nozzles 5. The cooling system is designed to enclose the housing 1 with the formation of the cavity 6 of the cooling jacket 7. The jacket 7 has an inlet and outlet fitting 8.9 for the supply and removal of water. Water jet pump 10 output communicated with fitting 8. To the passive nozzle 11 of the pump 10 is connected to a heat exchanger 12, the inlet of which is connected to the fitting 9. On the body 1 inside the jacket 7 is applied a porous coating 13. The cavity 6 is connected by a pipe 14 to the pipe 3. The use of heat of vaporization of the cooling water reduces operating costs. 1 il.

Description

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The invention retards to vacuum technology and can be used in diffusion vacuum pumps.

The purpose of the invention is to reduce operating costs.

The drawing shows a diffusion vacuum pump.

The diffusion vacuum pump includes a housing 1 with a suction 2 and a discharge 3 nozzles, steam pipes 4 placed along it along the axis with nozzles 5, a cooling system made in the form of a cooling jacket 7 with an inlet fitting 8 and an output choke 9 for enclosing the housing 1 with formation of cavity 6 supplying and discharging cooling water, the cooling system further comprising a water-jet pump 10 connected to its passive nozzle 11 connected to its passive nozzle 11 and connected to its passive nozzle 11; n with an outlet nipple 9 in the upper part of the cooling jacket 7, a porous coating 13 is applied to the housing 1, and the cavity 6 of the jacket 7 is connected by a pipe 14 to the discharge pipe 3.

Diffusion pump contains boiling point 15.

The pump works as follows.

The working fluid is heated in the boiler 15 until boiling. The working fluid vapor emanates from the nozzles 5, absorbs the molecules of the pumped gas and then condenses on the cooled wall of the housing 1. The gas is pumped out by a fore vacuum pump, and the liquid flows into the boiler 15. The condensation zone of the wall of the housing 1 is cooled by supplying water with a water jet pump 10. At the same time

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but the passive nozzle 11 pumps out the vapor-gas mixture from the cavity 6, creating a vacuum in it.

Water rises along the porous coating 13 along the wall of the housing 1. The creation of a reduced pressure in the cavity 6 contributes to the intensification of the evaporation of cooling water and to the improvement of cooling of the condensation zone of working fluid vapors on the housing 1.

The heat exchanger 12 provides condensation of cooling water vapor.

When the cavity 6 is connected to the discharge port 3, the water-jet pump 10 is used as a fore vacuum pump.

By using the heat of vaporization of the cooling water, operating costs are reduced compared with conventional cooling systems.

Claims (1)

Invention Formula A diffusion vacuum pump comprising a housing with suction and discharge nozzles, axially installed steam lines with nozzles, a cooling system made as a female body with the formation of a cavity of the cooling jacket with an inlet and outlet nozzles, respectively, for supplying and discharging water, that, in order to reduce operating costs, the system Cooling 0 additionally contains a water jet pump connected to the passive nozzle of the cooling jacket; its heat exchanger is connected to its passive nozzle; its inlet is connected to the output fitting in the upper part of the cooling jacket; a porous coating is applied to the housing inside the latter and the working cavity is connected to the discharge cavity branch pipe.