Nozzle throat section with annular reinforcing ribs

Abstract

The invention provides a nozzle throat section with annular reinforcing ribs. The annular reinforcing ribs are arranged outside an inner cylinder body in the throat section, the overall rigidity of the throat section is enhanced, and the risk of instability of the throat section is reduced. Two or more annular reinforcing ribs are distributed on the outer circumferential surface of the inner cylinder body in the axial direction, and two or more axial strip-shaped grooves are distributed in the outer circumferential surface of the inner cylinder body in the circumferential direction to serve ascold water tanks; and the cold water tanks penetrate through the axial direction of the inner cylinder body to form a cooling water channel, a connecting flange is provided with a water inlet channeland a water outlet channel which are in communication with the cooling water channel; annular grooves which are in one-to-one correspondence with the annular reinforcing ribs are distributed on the inner circumferential surface of an outer cylinder body in the axial direction, when the outer cylinder body sleeves the outer portion of the inner cylinder body, the annular reinforcing ribs are located in the annular grooves corresponding to the outer cylinder body; and the outer cylinder body is fixedly connected with the annular reinforcing ribs, and the nozzle throat section of the structure form can adapt to the use requirements of high mach numbers.

Description

technical field [0001] The invention relates to a nozzle structure, in particular to a nozzle throat section structure with annular reinforcing ribs. Background technique [0002] The throat section of the nozzle includes a chrome-zirconium copper lining and a stainless steel jacket. The outer circumference of the chromium-zirconium copper lining is distributed with axial cold water tanks along the circumferential direction. The stainless steel jacket is coaxially set outside the chromium-zirconium copper lining. Brazing or diffusion welding is used to connect the copper inner lining and the stainless steel outer jacket. [0003] In the development process of the nozzle throat section with high Mach number (Ma6 and above), in order to meet the needs of structural strength and rigidity as well as heat exchange and manufacturing, the total height of the chromium-zirconium-copper inner cylinder is usually taken as L=5-8mm, At the same time, the chromium-zirconium copper materi...

AI Technical Summary

Problems solved by technology

[0004] However, the inner cylinder of this structure is a thin-walled diffusion welding or brazing structure, which also brings technical risks.

Because once the diffusion welding or brazing structure is unsatisfactory or not welded in a local area, it can neither be repaired nor repaired. When the cooling water channel passes through high-pressure cooling water, the unsatisfactory or unwelded area will be unstable (bulging ), leading to the scrapping of the entire nozzle throat section, which will not only bring great economic losses to our company, but also seriously delay the progress of scientific research and production. Therefore, it is necessary to redevelop the nozzle throat section of the 4m test bench Ma6.5 New throat section structure to avoid this technical risk

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