Low-temperature hydraulic turbine

Abstract

The invention discloses a low-temperature hydraulic turbine. A rotor impeller end and a nozzle set are completely arranged in a cavity in a volute; a volute main body is placed into a perlite sand cold-keeping box; a heat-insulating cushion for insulating is arranged between the volute and a shell, so that a cold screen is effectively realized; an oil seal with an oil slinger structure is not used in a rotor, so that the use of a rotating part is reduced and the running reliability is increased; the nozzle set is completely connected with the shell through a nozzle clamping flange; the compressing degree of a nozzle compressing plate to a nozzle blade is adjusted by a disc spring; a nozzle turntable is axially and rotatably connected with a nozzle chassis and a nozzle adjusting mechanism passing through the volute is used for adjusting an angle; an outlet of the impeller is connected with a pressure expanding pipe, so as to reduce the flow rate at the outlet of the impeller and reduce the flowing loss; a lateral sealing and a shaft sealing of a wheel cover are respectively fixed in the axial direction on the nozzle clamping flange and a sealing gas piece; and the sealing gas piece and the oil seal are both fixed in the axial direction on the shell through bolts, so that the axial part of the whole turbine is conveniently positioned and mounted.

Description

technical field [0001] The invention belongs to the residual pressure recovery technology in the fields of low-temperature liquefaction, low-temperature air separation, etc., and relates to a radial and axial flow low-temperature hydraulic turbine, in particular to a hydraulic turbine for throttling and reducing pressure of low-temperature and high-pressure liquids. Background technique [0002] Energy conservation and emission reduction is the main component and important guarantee of the sustainable development strategy of the global economy, which can effectively alleviate the constraints of energy bottlenecks and establish an energy-saving society. The recovery of industrial waste energy in large energy-consuming devices is one of the key measures for energy conservation and emission reduction, and has great social and economic value. Cryogenic hydraulic turbine is a substitute product of coke-soup liquid throttle valve in high-energy low-temperature circulation devices ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a low-temperature high-pressure liquid throttling hydraulic turbine, which can solve the shortcomings of existing low-temperature hydraulic turbines, such as large loss of cooling capacity, large flow loss at the outlet of the impeller, and difficulty in positioning and installation of the whole machine structure. Effectively replace the liquid throttle valve in the existing traditional air separation, liquefied natural gas and other high-energy low-temperature circulation devices to achieve the purpose of reducing the gasification rate and recovering high-pressure energy

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