Rotary wheel body big and small axle holes coaxially processing method

Abstract

The invention relates to a method for coaxially processing the large and small axial holes of rotator, to confirm the coaxial degree. Wherein, it comprises that first processing large axial hole, then inserting boring main axle 2 into small axial hole to fine the jump of large axial hole via gage 3 at the part that boring axle is near to the end; via said jump. Increasing the boring main axle for 1 / 2 jump. The invention uses gage to test the jump Delth, to increase 1 / 2 Delth of main axle, with simple process and low cost.

Description

technical field

[0001] The invention relates to a coaxial processing method for large and small shaft holes of a runner body of a hydroelectric generator. Background technique

[0002] The runner body is the core part of the turbine generator set. The coaxiality of the big and small shaft holes of the runner body directly affects the blade assembly and whether the blade rotation is flexible during the operation of the unit. The depth of the large and small shaft holes of a runner body is 793mm, and the coaxiality of the large and small shaft holes is 0.02mm. When machining the shaft holes on a boring machine, due to the rigidity of the machine tool spindle, the phenomenon of drooping often occurs when machining deep holes. Contents of the invention

[0003] The object of the present invention is to provide a coaxial processing method for the large and small shaft holes of the runner body of the hydraulic generator to overcome the technical difficulty of coaxial processing ...

Examples

Embodiment Construction

[0009] Further describe the technical scheme of the present invention below in conjunction with accompanying drawing: As Fig. 1 a, comprise runner body 1, boring machine main shaft 2, the coaxial processing method of runner body big and small axis hole is: process big shaft hole first, then the boring machine main shaft stretches into For the small shaft hole, set a dial indicator 3 near the end of the boring shaft, and find out the runout Δh of the large shaft hole from the dial indicator 3.

[0010] As shown in Figure 1b, after finding the runout Δh of the large shaft hole, artificially raise the spindle of the boring machine by half of the runout according to the runout Δh, that is, Δh / 2.

technical field

[0001] The invention relates to a coaxial processing method for large and small shaft holes of a runner body of a hydroelectric generator. Background technique

[0002] The runner body is the core part of the turbine generator set. The coaxiality of the big and small shaft holes of the runner body directly affects the blade assembly and whether the blade rotation is flexible during the operation of the unit. The depth of the large and small shaft holes of a runner body is 793mm, and the coaxiality of the large and small shaft holes is 0.02mm. When machining the shaft holes on a boring machine, due to the rigidity of the machine tool spindle, the phenomenon of drooping often occurs when machining deep holes. Contents of the invention

[0003] The object of the present invention is to provide a coaxial processing method for the large and small shaft holes of the runner body of the hydraulic generator to overcome the technical difficulty of coaxial processing ...

Examples

Embodiment Construction

[0009] Further describe the technical scheme of the present invention below in conjunction with accompanying drawing: As Fig. 1 a, comprise runner body 1, boring machine main shaft 2, the coaxial processing method of runner body big and small axis hole is: process big shaft hole first, then the boring machine main shaft stretches into For the small shaft hole, set a dial indicator 3 near the end of the boring shaft, and find out the runout Δh of the large shaft hole from the dial indicator 3.

[0010] As shown in Figure 1b, after finding the runout Δh of the large shaft hole, artificially raise the spindle of the boring machine by half of the runout according to the runout Δh, that is, Δh / 2.

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