Butt joint guide device and process method for unit body with long shaft

Abstract

The invention provides a butt joint guide device and process method for a unit body with a long shaft. The butt joint guide device can be used for avoiding the head falling phenomenon, the unit body is in butt joint with another unit body with a deep hole, and the butt joint guide device comprises a rear end clamping mechanism used for achieving multi-degree-of-freedom posture adjustment of the unit body, and in the butt joint guide device, a virtual shaft is used for being connected with the front end of the long shaft of the unit body and is in sliding fit with an in-hole structure of the deep hole so as to form front end supporting on the virtual shaft; an auxiliary centering device is used for being arranged on the inlet side of the deep hole and comprises three rollers, the three rollers are rotatably arranged, and a moving channel of the long shaft is limited by a cylinder tangent to the three rollers; and a radial run-out monitoring device is used for monitoring the radial run-out of the three rollers.

Description

technical field [0001] The invention relates to a docking guide device and a process method of a unit body with a long axis. Background technique [0002] The main structure of a type of aero-engine includes a fan unit, a core unit, and a low-pressure turbine unit, and has the characteristics of complex structure, large size, high precision, and heavy weight. The low-pressure turbine unit includes a low-pressure turbine shaft, a low-pressure turbine rotor, and a low-pressure turbine casing, and the weight is concentrated at the rear end, that is, the low-pressure turbine rotor and casing end. The weight of the low-pressure turbine unit is about 800kg, and the length of the low-pressure turbine shaft is about 2000mm. 0.057mm; the sealing gap between the rear sealing grate of the low-pressure turbine shaft and the rear sealing assembly is 0.2mm-0.276mm, and the matching gap between the front sealing grate of the low-pressure turbine rotor and the interstage casing sealing ass...

AI Technical Summary

Problems solved by technology

[0003] During the engine assembly process, the low-pressure turbine unit assembly adopts a horizontal docking mode, such as figure 1 As shown, the low-pressure turbine unit is clamped by the rear-end clamping structure along a fixed track to realize the docking and assembly of the low-pressure turbine unit. The rear-end clamping structure can realize multi-degree-of-freedom attitude adjustment of the low-pressure turbine unit. The distance is long, the weight is heavy, and the center of gravity is biased to the rear. The horizontal assembly process is prone to drooping. In addition, the fit clearance is small. Once the drooping phenomenon occurs, it is easy to cause scratches between parts and cause damage to the parts.

In addition, the assembly of the low-pressure turbine unit is a deep blind hole assembly, and the contact part is invisible. The operator cannot obtain the actual state of the contact part, and adjust the posture of the low-pressure turbine unit according to the contact state to eliminate interference between parts

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