Inter-stage casing force bearing framework

Abstract

The invention discloses an inter-stage casing force bearing framework. The inter-stage casing force bearing framework comprises a support plate, an outer casing, a plurality of caps, a guider blade and a bearing block, wherein the support plate and an inner casing are integrally molded; one end of the support plate is arranged on the inner casing, and the other end of the support plate is providedwith a plurality of fixture blocks; the outer casing is provided with the caps; the caps are evenly distributed in the circumferential direction; a fixture slot is formed in each cap; each fixture block of the support plate and the corresponding fixture slot are inserted and connected; and each fixture block and the corresponding fixture slot are in clearance fit. According to the inter-stage casing force bearing framework disclosed by the invention, the problems of thermal deformation and incoordination caused by the fact that the inner casing and the outer casing and the support plate are connected by bolts are solved through the inserted-connected structure of the support plate and the casings; the support plate and the fixture slots are of an inserted-connected structure, and each cylindrical fixture block at the outer end of the support plate can freely expand in the radial direction in the corresponding fixture slot so as to compensate thermal deformation and incoordination of the support plate and the casings, thereby reducing the influence of thermal stress.

Description

technical field [0001] The invention relates to the technical field of aeroengines and aeroderivative gas turbines, in particular to an interstage casing load-bearing frame. Background technique [0002] Many aero-engines and aeroderivative gas turbines use the inter-stage case load-bearing frame as the load-bearing frame of the rear fulcrum of the high-low pressure rotor, and use the load-bearing support plate installed in the inner cavity of the blade to support and transmit the load of the rotor. The load is transmitted from the bearing housing to the outer load-bearing casing. The interstage load-bearing frame structure is mainly composed of outer casing, support plate, guide vane, inner casing, bearing seat and so on. In the traditional interstage load-bearing frame structure design, the support plate and the inner and outer casings are generally connected by bolts, which is a mechanically connected load-bearing frame structure. [0003] In the load-bearing frame of t...

AI Technical Summary

Problems solved by technology

[0003] In the load-bearing frame of the traditional interstage casing, due to the different working temperatures and thermal expansion of each component, there is a problem of thermal deformation inconsistency, resulting in large thermal stress, in which the thermal deformation between the support plate and the inner and outer casings is not coordinated The thermal stress is the most serious, and it is easy to cause cracks or plastic deformation in the inner casing or outer casing due to excessive thermal stress.

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