An injector with adjustable inner wall structure

Abstract

The invention discloses an ejector with an adjustable inner wall structure. The ejector comprises a suction chamber, a spray nozzle, a mixing chamber and a diffusion chamber, wherein the suction chamber is provided with an ejecting steam inlet; the spray nozzle is arranged in the suction chamber; the mixing chamber is communicated with the suction chamber and the spray nozzle; the mixing chamber comprises a tapered section and a cylindrical section; the tapered section is composed of an inner-layer wall surface and an outer-layer wall surface, the outer walls of the inner-layer wall surface and the outer-layer wall surface are fixed, and the inner walls of the inner-layer wall surface and the outer-layer wall surface are in smooth streamline forms, and are changeable in bending degree; the cylindrical section is in sandwich sleeve type connection, and comprises an inner-layer sleeve capable of axially moving, and a fixed outer-layer sleeve; the diffusion chamber is composed of an inner-layer wall surface and an outer-layer wall surface; a metal diaphragm sandwich with an independent cavity is arranged between the inner wall and the outer wall; and the bending degree of the inner wall of the diffusion chamber is regulated by regulating the sandwich thickness change. According to the ejector disclosed by the invention, the mixing chamber and the diffusion chamber can be adjusted in structure within certain range inside an ejector housing, so that needs of different working parameters can be adapted, and the ejector is guaranteed to have relatively high efficiency under a variable working condition.

Description

Technical field [0001] The invention relates to the field of ejectors, in particular to an ejector with an adjustable inner wall structure. Background technique [0002] The ejector is generally composed of a nozzle, a suction chamber, a mixing chamber and a diffuser chamber. Its working principle is that the motive steam enters the nozzle as a working fluid and then undergoes adiabatic expansion. The flow velocity at the outlet reaches supersonic speed, and the high-speed fluid in the suction chamber drives the pilot The jet steam flows along the axis of the ejector, and the two fluids with different pressures are mixed with each other in the mixing chamber, and the speed is reduced to below the speed of sound. The flow velocity of the mixed fluid in the diffuser chamber continues to decrease, and the pressure rises to the required requirement and then exits the ejector. Ejectors are widely used in the fields of petroleum and natural gas, chemical industry, refrigeration and hea...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an injector with an adjustable inner wall structure, thereby overcoming the disadvantages of the existing injectors whose internal structure is fixed and cannot be adjusted with changes in working conditions, resulting in a decrease in the efficiency of the injector

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