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A method of guaranteeing the accuracy of the shaft hole of the coupling shaft

A coupling and shaft hole technology, used in boring/drilling, drilling/drilling equipment, components of boring machines/drilling machines, etc., can solve problems such as large machining deviation, tool overhang, poor boring accuracy, etc. , to achieve the effect of small precision deviation, reliable machining accuracy and small vibration

Active Publication Date: 2022-07-12
HARBIN ELECTRIC MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the size of the positioning hole of the shaft hole is long or the thickness of the shaft flange is large, the equipment stroke is large during processing, and the tool overhang is too long, which will cause large machining deviation or poor boring accuracy due to tool vibration.

Method used

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  • A method of guaranteeing the accuracy of the shaft hole of the coupling shaft
  • A method of guaranteeing the accuracy of the shaft hole of the coupling shaft

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Embodiment Construction

[0027] 1) A single piece of hydraulic turbine shaft 1 and generator shaft 2 is qualified after finishing, the parallelism of the flange surface 12 of the hydraulic turbine shaft 1 and the flange surface 8 of the two shafts after finishing is not more than 0.03mm, the method of the generator shaft 2 The parallelism between the back 9 of the blue and the legal blue surface 8 of the two shafts after finishing is not more than 0.03mm;

[0028] 2) The two shafts are assembled and combined with the closing bolts 3, the gap between the flange surfaces 8 is less than 0.02mm, and the closing bolts 3 are evenly distributed and assembled according to the pitch circle of the shaft hole and every other hole, and the torque is evenly closed, see figure 1 ;

[0029] 3) After the two-shaft coupling is assembled, check the coaxiality of the coupling shaft system on the sleeping car, and after confirming that the coaxiality meets the IEEE810 standard, hang down the sleeping car and lay it on th...

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Abstract

The invention discloses a method for ensuring the accuracy of a shaft hole of a coupling and a boring shaft. The invention is suitable for the precise machining of the coupling locating hole of the hydroelectric unit with long locating dimension section and thick coupling flange. After coupling, locate the alignment section by aligning the coupling positioning hole with the boring, first ensure the precise position of the coupling hole positioning section, and then disassemble the two shafts for single-axis processing; during single-axis processing, press the legal surface and the determined position to align The dimensional accuracy and geometric tolerance of each boring hole are ensured, and the boring hole accuracy is approved by single piece and assembly after fine boring. By disassembling the single-piece boring of the coupling body, the invention shortens the overhang of the machining tool, reduces the equipment stroke, reduces the tool overhang deflection deviation and the machine tool precision deviation, improves the manufacturing accuracy, and reduces the cost of high-precision tools and high-precision equipment. It has the advantages of convenient process operation, reliable precision and so on.

Description

technical field [0001] The invention relates to the field of hydro-generator sets, in particular to a method for ensuring the accuracy of a shaft hole of a coupling shaft with a boring shaft. Background technique [0002] The turbine shaft and generator shaft of the hydro-generator unit are high-precision rotating parts of the hydropower station, and the coupling accuracy is related to the stable operation and service life of the unit. In the manufacturing process of the turbine shaft and the generator shaft, they are generally finished separately on the horizontal car. On the premise of confirming that the shaft assembly is coaxial, certain technical measures need to be adopted to ensure the relative position of the two coupling shafts and the boring holes. Accuracy, so as to accurately assemble the site and ensure the stable operation of the unit. [0003] The connection positioning holes of the turbine shaft and the generator shaft have high precision requirements, and h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B41/00B23B47/00
CPCB23B41/00B23B47/00Y02E10/20
Inventor 黄海玉葛军李鑫赵阳张微霍金平杨思晋
Owner HARBIN ELECTRIC MASCH CO LTD
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