Flue gas turbine moving blade assembly and flue gas turbine

Abstract

The invention relates to a flue gas turbine moving blade assembly and a flue gas turbine. The flue gas turbine moving blade assembly comprises moving blades (2) and a wheel disc (1) used for driving the moving blades to rotate, the number of the moving blades is multiple, the moving blades are arranged in the circumferential direction of the wheel disc, tenon teeth (21) of each moving blade are meshed with tenon roots (11) of the wheel disc, at the meshed position of the tenon tooth and the tenon root, the inclination angles of the contact faces of the tenon tooth and the tenon root are different, so that in the process that a smoke wheel is in a first working state to a second working state, line contact of the tenon tooth and the tenon root is changed into face contact. Through the arrangement, the stress concentration of the tenon teeth and the tenon roots is reduced, the strength reserve of a flue gas turbine rotor assembly is improved, long-term stable operation of the flue gas turbine and a device can be ensured, the influence of factors such as high-temperature expansion and stress deformation in the second working state, the tenon tooth and the tenon root which are in ideal surface contact in the first working state are stressed unevenly in the second working state, and large stress is generated is avoided.

Description

technical field [0001] The disclosure relates to the technical fields of oil refining and chemical industry, and in particular, to a flue gas turbine moving blade assembly and a flue gas turbine. Background technique [0002] The flue gas turbine is an important energy-saving equipment of the catalytic cracking unit. The flue gas turbine medium is high-temperature flue gas containing catalyst dust particles. The working environment of the flue gas turbine blades is relatively harsh, and the flue gas turbine blades often break. In recent years, with the large-scale development of catalytic devices and units, but limited by domestic manufacturing and processing levels and unit matching, the diameter of flue gas turbine discs cannot be increased synchronously. The stress level of the moving blades of the flue gas turbine is very high, and the strength reserve of the tenon teeth of the existing moving blades can no longer meet the demand. In order to ensure the efficiency of th...

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Problems solved by technology

[0006] The first object of the present disclosure is to provide a flue gas turbine moving blade assembly, which can solve the problems caused by the first working state due to high temperature expansion, force deformation and other factors in the second working state. The mortise teeth and mortise root in the lower ideal surface contact are unevenly stressed in the second working state, resulting in large stress

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