Coupling and boring axle hole accuracy guarantee method

A technology of shaft coupling and shaft hole, which is applied in boring/drilling, drilling/drilling equipment, parts of boring machine/drilling machine, etc. It can solve problems such as poor boring accuracy, large machining deviation, and large equipment stroke. Achieve the effect of small precision deviation, small vibration and high position precision

Active Publication Date: 2020-11-20
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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  • Coupling and boring axle hole accuracy guarantee method
  • Coupling and boring axle hole accuracy guarantee method

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Experimental program
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Effect test

Embodiment Construction

[0027] 1) The single-piece turbine shaft 1 and generator shaft 2 are qualified for finish turning, the parallelism between the flange surface 12 of turbine shaft 1 and the legal flange surface 8 of the two shaft handles after finish turning is not greater than 0.03mm, and the flange surface 9 of generator shaft 2 The parallelism with the two-axis handlebar flange surface 8 after finish turning is not more than 0.03mm;

[0028] 2) The two shafts are assembled together with joint bolts 3, the gap between the joint flanges 8 is less than 0.02mm, the joint bolts 3 are evenly distributed every other hole according to the shaft hole distribution pitch circle, and the torque is evenly jointed, see figure 1 ;

[0029] 3) After the two-axis coupling is assembled, check the coaxiality of the coupling shaft system on the lying car, and after confirming that the coaxiality meets the IEEE810 standard, hoist the lying car and lay it on the boring machine platform;

[0030] 4) Set up the di...

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Abstract

The invention discloses a coupling and boring axle hole accuracy guarantee method. The method is suitable for accurate machining of the coupling positioning hole of a hydroelectric generating set withlong positioning dimension segment and large coupling flange thickness. After coupling, boring a positioning alignment section for a coupling positioning hole, the precise position of a positioning section of the coupling hole is firstly ensured, and then the two shafts are disassembled for single-axis machining; and during single-axis machining, the boring holes are aligned according to the alignment sections of an occlusal flange face and the determined position, the size precision and the geometric tolerance of each boring hole are guaranteed, and the boring precision is approved through single piece and assembly after fine boring is finished. By disassembling a single-piece boring hole of a coupling body, the overhanging of a machining tool is shortened, the equipment stroke is reduced, the tool overhanging deflection deviation and machine tool precision deviation are reduced, the manufacturing precision is improved, the configuration of high-precision tools and high-precision equipment is reduced, the manufacturing cost is saved, and the method has the advantages of being convenient in process operation, reliable in precision and the like.

Description

technical field [0001] The invention relates to the field of hydroelectric generating sets, in particular to a method for ensuring the accuracy of shaft coupling and co-boring shaft holes. Background technique [0002] The turbine shaft and generator shaft of the hydro-generator set are high-precision rotating parts of the hydropower station, and the coupling precision is related to the stable operation and service life of the unit. During the manufacturing process of the turbine shaft and the generator shaft, they are generally finished separately on the horizontal lathe first. On the premise of confirming that the shaft assembly is coaxial, certain technical measures need to be taken to ensure the relative position and boring of the joint holes of the two coupling shafts. Accuracy, to facilitate accurate assembly on site, to ensure stable operation of the unit. [0003] The precision of the connection positioning hole of the turbine shaft and the generator shaft is high, ...

Claims

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Application Information

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Patent Type & Authority Applications(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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