A low-pressure turbine guide vane clamping mechanism and clamping method

Abstract

The invention provides a clamping mechanism and method of a guide blade of a low-pressure turbine. The clamping mechanism comprises a base. Multiple positioning blocks, positioning pins, a jacking mechanism and profile-followed pressing mechanisms are mounted on the upper surface of the base. The positioning blocks are mounted on the right side and the front side of the base, the positioning pinsare mounted on the left side and the right side of the base, the jacking mechanism is mounted on the left side of the base, and the profile-followed pressing mechanisms are mounted in the middle of the base. The profile-followed pressing mechanisms comprise pressing bases, the pressing bases are fixedly connected to the upper surface of the base and stretch upwards, pressing blocks are mounted above the pressing bases, through holes are formed in the pressing blocks, threaded holes are formed in the upper surfaces of the pressing bases, and the pressing blocks and the pressing bases are connected through hexagon bolts. The clamping mechanism and method aim at solving the problems that when an existing guide blade of a low-pressure turbine is machined, multiple times of clamping are needed,time and labor are wasted, datum transformation is generated, and the machining precision of the part is affected.

Description

technical field [0001] The invention belongs to the field of manufacturing guide blades of aero-engine wheels, and in particular relates to a clamping mechanism and a clamping method for guide blades of a low-pressure turbine. Background technique [0002] Turbine guide vanes are an important component of the turbine section in a turbine engine. The high-speed rotating blades are responsible for drawing high-temperature and high-pressure air into the burner to maintain the engine's work. Low-pressure turbine guide vanes usually adopt a multi-connected structure, the common structure is 4-6 blade groups, the radial span of the blade body is large, the chord length is short, and the overall structure of the parts is long, wide and flat. The airfoil of the turbine guide vane is precision-cast without allowance, and the mounting and matching surfaces of the parts need to be machined. [0003] When the existing low-pressure turbine guide blades are processed on both ends, a bri...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a low-pressure turbine guide vane clamping mechanism and a clamping method, aiming to solve the problem that current low-pressure turbine guide vanes need to be clamped multiple times during processing, which is time-consuming and labor-intensive, and will cause benchmark conversion and affect the processing accuracy of parts.

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