An engine fuel supply support plate casing structure and an engine comprising the structure

Abstract

The invention discloses a novel engine oil supply support plate receiver structure and an engine comprising the structure. An oil supply support plate receiver is fixedly welded with a low-pressure turbine guider; multiple support plate blades in the oil supply support plate receiver are nonuniformly arranged in the peripheral direction to prevent resonance of an engine turbine part under high-speed operation condition; lubricating oil pipelines are arranged in at least one support plate blade, and are positioned on the lower side in the oil supply support plate receiver; each support plate blade is a three-dimensional torsional structure on space; at least two of multiple section blade shapes in different radial positions of the same support plate blade are different, so that each support plate blade can adapt to upstream incoming airflow angle and provide a proper flowing field to a downstream turbine, and pneumatic loss is obviously reduced; and the maximum thickness positions of different section blade shapes of each support plate blade are arranged in the same axial section, and are positioned on the same radial angle line, so that the support plate blades with the three-dimensional torsional structures can be smoothly arranged on the lubricating oil pipelines.

Description

technical field [0001] The invention relates to ground gas turbines, especially the turbine field of high-temperature components of aero-engines. More specifically, it adopts an oil supply support plate casing structure to improve the aerodynamic design structure between high and low-pressure turbine stages of aero-engines, reduce aerodynamic losses, and improve engine performance. Background technique [0002] In ground gas turbines and aero engines, in order to provide lubricating oil to the high pressure and low pressure rear bearings of the engine, a lubricating oil system needs to be arranged. To this end, a strut plate is formed in the transition between the high-pressure turbine and the low-pressure turbine. In order to meet the requirements of containing the lubricating oil pipe, the thickness of the support plate is often relatively large. In the existing engine design, for the convenience of design and processing, and limited by the detection method, these struts ...

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Problems solved by technology

However, this design brings the following problems: (1) the straight-leaf strut cannot adapt to the upstream airflow angle, resulting in a large aerodynamic loss; (2) the straight-blade strut cannot provide a suitable airflow angle for the downstream turbine stage, It is unfavorable to the aerodynamic performance of the downstream turbine, and increases the difficulty of additional low-pressure turbine design; (3) The straight-blade strut plate produces a very large disturbance to the flow field, which brings a large aerodynamic excitation force, which is easy to cause the downstream low-pressure turbine Low-cycle fatigue threatens the operation of the engine; (4) In order to ensure sufficient strength in the transition section, multiple support plates are generally designed, and evenly distributed support plates are likely to cause engine resonance problems, which is not conducive to the safe operation of the engine

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