A comprehensive evaluation method for the maintainability of the rocker arm system of a coal mining machine
A technology of comprehensive evaluation and fuzzy comprehensive evaluation, applied in the field of comprehensive evaluation of the maintainability of the rocker arm system of the shearer, can solve the problems such as the immaturity of the comprehensive evaluation of the maintainability of the rocker arm system of the shearer, and achieve the scientific and comprehensive level of maintainability and maintenance. Sexual evaluation is accurate and reasonable
Active Publication Date: 2020-12-22
CHINA UNIV OF MINING & TECH
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Problems solved by technology
The existing maintainability models mainly determine the maintenance status of small and simple systems, but the comprehensive evaluation of the maintainability of large and complex shearer rocker arm systems integrating machinery, electricity, and hydraulics is still immature
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[0112]Based on the maintenance status of the rocker arm system of the shearer, the optimal design scheme can be determined and measures to improve the maintainability of the rocker arm system of the shearer can be proposed. The implementation methods are as follows:
[0113] For several different design schemes, the system-level maintainability index can be calculated according to the above method to determine the optimal scheme, and the weak links of each scheme can be analyzed to propose reasonable improvement measures.
[0114] When calculating the maintainability index of each subsystem, set the membership degree of a certain qualitative index of a certain system to the highest comment as 1 or take a certain quantitative data as the maximum value x max , causing the change in the maintainability index of the rocker arm system. The greater the change, the better the index of the subsystem can improve the maintainability of the rocker arm system of the shearer. That is, this ...
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The invention discloses a method for comprehensively evaluating maintainability of rocker arm systems of coal mining machines. The method is implemented on the basis of a triangular fuzzy number analytic hierarchy process (TFAHP) and a fuzzy synthetic evaluation model. The method comprises the following steps of firstly, establishing a coal mining machine rocker arm system maintainability analytic hierarchy model and calculating a maintainability weight of each subsystem by utilizing the TFAHP; secondly, normalizing a maintainability quantitative index and quantitative data of each subsystem to obtain a maintainability effectiveness value; processing the quantitative indexes by adoption of the fuzzy synthetic evaluation model and processing the quantitative data by adoption of a linear mathematic model; calculating a maintainability index of each subsystem; and finally synthesizing the maintainability weight and maintainability index of each subsystem to carry out calculation so as to obtain a maintainability index of a rocker arm system of a coal mining machine. According to the system-level maintainability index, an optimum scheme in different design schemes can be determined, and weak links in the design schemes can be analyzed to propose effective improvement measures.
Description
technical field [0001] The invention relates to the technical field of maintainability of coal mine mechanical equipment, and mainly relates to a method for comprehensively evaluating the maintainability of a rocker arm system of a coal mining machine. Background technique [0002] As a basic attribute of equipment, maintainability reflects its ability to maintain quickly, conveniently and economically. As the main component of the shearer, the rocker arm system of the shearer is also a part where failures occur frequently. The quality of its maintenance status is directly related to the working efficiency of the entire shearer. During the operation of the coal shearer, due to the special working environment and changing working conditions, it is necessary to grasp the maintenance status of the entire rocker arm system, so as to implement maintenance in a timely and efficient manner and reduce equipment maintenance costs. The existing maintainability models mainly determine...
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IPC IPC(8): G06F30/20G06Q10/06G06Q10/00
CPCG06Q10/20G06F30/17G06F30/20
Inventor 程刚陈相丞李勇刘畅杨金勇杨建华
Owner CHINA UNIV OF MINING & TECH