tailieunhanh - Gas Turbine Engineering Handbook 2 Episode 16

Tham khảo tài liệu 'gas turbine engineering handbook 2 episode 16', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Maintenance Techniques 735 c. Basic Machinist Training. Most of the basic training can be developed and conducted by in-plant personnel. This training can be highly detailed and tailored precisely to meet individual plant requirements. Training must be carefully planned and administered to fit the requirements of different machinery in the plant. Many plants have a full-time training program and personnel for conducting training at this basic level. Good maintenance practices should be inculcated into the young machinist from the beginning. He should be taught that all clearances should be carefully checked and noted both before and after reassembly. He should learn the proper care in the handling of instrumentation and the care in placing and removing seals and bearings. A base course on the major turbomachinery principles is a must so there is basic understanding of what these machines do and how they function. The young machinist should also be exposed to basic machinery-related courses such as 1. Reverse indicator alignment 2. Gas and steam turbine overhaul 3. Compressor overhaul 4. Mechanical seal maintenance 5. Bearing maintenance 6. Lubrication system maintenance 7. Single plane balancing Tools and Shop Equipment A mechanic must be supplied with the proper tools to facilitate his jobs. Many special tools are required for different machines so as to ensure proper disassembly and reassembly. Torque wrenches should be an integral part of his tools as well as of his vocabulary. The concepts of finger tight and hand tight can no longer be applied to high-speed high-pressure machinery. A recent major explosion at an oxygen plant which resulted in a death was traced back to gas leakage due to improper torquing. A good dial indicator and special jigs for taking reverse indicator dial readings is a must. The jigs must be specially made for the various compressor and turbine trains. Special gear and wheel pullers are usually necessary. Equipment for heating wheels in