Blade sentencing

A technology of blades and components, which is applied in the field of judging blades used in turbine engines, can solve problems such as waste, and achieve the effect of improving judgment

Inactive Publication Date: 2020-03-06
ROLLS ROYCE PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this prior art process can result in a great deal of waste as enough blades are rejected based on size based criteria
Therefore, there is a need for an improved way of determining accepted blades so that there is less waste in the process

Method used

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  • Blade sentencing
  • Blade sentencing
  • Blade sentencing

Examples

Experimental program
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Embodiment Construction

[0027] according to figure 2 , a gas turbine engine generally indicated at 10 having a main and rotational axis 11 . Engine 10 includes air inlet 12 , propulsion fan 13 , medium pressure compressor 14 , high pressure compressor 15 , combustion equipment 16 , high pressure turbine 17 , medium pressure turbine 18 , low pressure turbine 19 and exhaust nozzle 20 in axial flow sequence. The compartment 21 generally surrounds the engine 10 and defines both the inlet 12 and the exhaust nozzle 20 .

[0028] The gas turbine engine 10 operates in a conventional manner whereby air entering the inlet 12 is accelerated by the fan 13 to generate two air streams: a first air stream into the intermediate pressure compressor 14 and a bypass passage 22 to provide propulsion thrust the second air flow. The medium-pressure compressor 14 compresses the air flow introduced into it before passing it to the high-pressure compressor 15 where further compression takes place.

[0029] The compressed...

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Abstract

A method of sentencing, accepting or rejecting, a cast component is disclosed. Initially, scanning the component to determine a number of datum points; this can be done using optical scanning techniques. The datum points from the scanned results are then aligned with an ideal design computer aided design (CAD) model of the component. A comparison of the scanned datum points of the component is performed against the data from the ideal design CAD model of the component, and any geometric deviations between the scan and the ideal design CAD model are determined. Using the datum points from the scan of the component an assessment is performed of at least one performance prediction factor for the component. Finally, using dimensional data extracted from the scan and / or the performance prediction factor the component is sentenced for either acceptance or rejection. Additionally, if the component is determined to have a deviation that lies within a pre-determined limit for the dimensional data and / or the performance factor a determination may be made as to whether the component can be reoriented.

Description

technical field [0001] The present invention relates to a method of evaluating blades for use in turbine engines. Background technique [0002] A blade used in a turbine or compressor stage of a turbine engine comprises an airfoil section having a leading edge and a trailing edge with pressure and suction surfaces, as in figure 1 as shown in. In order to maintain a pressure gradient along the length of the blade, the blade 1 twists from the root 2 to the tip 3 . In order to achieve having a constant pressure gradient for performance and also the correct angle of constraint it is important that the blade is manufactured at the correct angle of incidence at each point. In addition to these factors, another important consideration for the performance of a rotating blade is the exit flow angle of the blade; the exit flow angle is the angle at which air leaves the blade. [0003] Blades for turbine engines are typically cast from superalloy materials to form individual crystal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/20G06F119/14
CPCG06T7/0004G06T2207/30116G06T2207/30164B23P6/002G05B19/4099G05B2219/35128G05B2219/45147
Inventor J.库尔W.N.道斯W.Y.李
Owner ROLLS ROYCE PLC
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