Integrated multistage axial flow contrarotating turbine structure

Abstract

The invention discloses an integrated multistage axial flow contrarotating turbine structure which comprises an inner rotor, an outer rotor, a sun gear, an outer gear ring and a planet carrier. The outer rotor is arranged on the periphery of the inner rotor. The inner rotor and the sun gear are arranged coaxially and fixedly connected. The outer rotor and the outer gear ring are coaxial and fixedly connected. The sun gear and the planet carrier are arranged in the outer gear ring. The outer gear ring is engaged with the sun gear through a plurality of planet gears on the planet carrier. By arranging the outer rotor provided with a right rotating blade on the inner rotor provided with a left rotating blade in an opposite installing angle in a sleeving mode, high-temperature working media can be made to push the inner rotor and the outer rotor to rotate when flowing into a turbine, and two strands of power are synthesized to be output through the planet gears. By adoption of the novel integrated multistage axial flow contrarotating turbine structure, the turbine single-stage working capability is enhanced, and the size of the turbine is decreased; and power output structures of the planet gears can be adjusted so as to be matched with the optima speed ratios of all stages of the turbine, and accordingly the turbine circumference efficiency of the turbine is improved.

Description

technical field [0001] The invention relates to the field of axial-flow motive turbine machinery, in particular to a multi-stage integral axial-flow counter-rotating turbine structure. Background technique [0002] Compared with reciprocating prime movers, steam turbines and gas turbines, as axial flow prime movers, can generate higher power and have higher thermal efficiency due to the continuous high-speed flow of their working medium in their flow parts, and are widely used in Military and civilian fields such as power generation, distributed energy, ship power and chariot power. [0003] For the current steam turbine and gas turbine, after the high-temperature working fluid enters the turbine, it expands in the guide vane flow channel and obtains a high speed, and then converts the energy of the working fluid into the work of the turbine through the moving blade to drive the rotor to rotate. In this process, since the guide vane does not participate in the rotation, the...

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Problems solved by technology

In this process, since the guide vane does not participate in the rotation, the single-stage enthalpy drop of the turbine is small, resulting in more turbine stages and larger volume

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