A method for controlling the low cycle life of an engine
A technology of life control and engine, which is applied in the direction of engine testing, machine/structural component testing, measuring devices, etc. It can solve problems such as failure to meet engine reliability requirements, load increase, low cycle fatigue life, etc., and achieve good technical benefits and economic benefits, ensuring safe and reliable work, and wide adaptability
Active Publication Date: 2017-01-11
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] At present, domestic engines generally use the method of limiting the total working time for life control, that is, it is stipulated that the working time of the engine should not exceed a certain number of hours, and a life-span repair will be carried out after the working time reaches the specified number of hours; This method is used for life control to ensure safe and reliable operation within its lifespan; as the engine's subsequent operating conditions change, the engine's low-cycle load increases sharply, resulting in low-cycle fatigue life that cannot meet the engine's reliability requirements; in order to To ensure the reliability of the engine work, there is an urgent need for a low cycle fatigue life control method to achieve effective control of the low cycle life of the engine
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0016] An embodiment of the present invention will be further described below in conjunction with the accompanying drawings.
[0017] In the embodiment of the present invention, the engine low cycle life control method, the method flow chart is as follows figure 1 As shown, the method includes the following steps:
[0018] Step 1. Carry out low-cycle fatigue damage experiments on parts with weak service life of the tested engine to determine the low-cycle service life of the engine, that is, to obtain the total number of standard low-cycle times of the engine;
[0019] When the engine is designed and produced, there are some parts with weak life. The standard low cycle number allowed by the parts with weak life is used as the standard low cycle number of the whole engine to ensure that the low cycle life of the engine is within a safe range.
[0020] In the embodiment of the present invention, the rotor disk, the component with the weakest service life of the engine, is taken...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a low-cycle life control method of an engine, belonging to the technical field of reliability design of aeroengines. A working rotating speed interval of the engine is classified in a special method, and the rotating speed of the engine in practical use is used to obtain typical engine low-cycle spectra in the classification method; the low-cycle spectra are converted into the standard low-cycle frequency in a calculation method, and the accumulated standard low-cycle frequencies are required to not exceed a design index. The method can be used to effectively monitor the low-cycle fatigue life of the engine, ensure the engine to work safely and reliably in the service life, and the control method is widely adaptive in practical application, can be applied to different type of engines and has technical and economical benefits.
Description
technical field [0001] The invention belongs to the technical field of reliability design of aero-engines, and in particular relates to a method for controlling the low cycle life of an engine. Background technique [0002] At present, domestic engines generally use the method of limiting the total working time for life control, that is, it is stipulated that the working time of the engine should not exceed a certain number of hours, and a life-span repair will be carried out after the working time reaches the specified number of hours; This method is used for life control to ensure safe and reliable operation within its lifespan; as the engine's subsequent operating conditions change, the engine's low-cycle load increases sharply, resulting in low-cycle fatigue life that cannot meet the engine's reliability requirements; in order to To ensure the reliability of the engine work, a control method for low cycle fatigue life is urgently needed to achieve effective control of th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01M15/00
Inventor 张海江李伟朱哲佟永军王德柱
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION