Shape-following slicking device for gap of steam-sealing ring of steam turbine

Abstract

The invention discloses a shape-following slicking device for gap of steam-sealing ring of steam turbine, comprising an installation seat, a bearing seat base plate, a shaft, an outer bearing fixing frame, a straight mill fixing frame, a straight mill fixing frame secondary body, a tool rest adjusting seat and a hand wheel, wherein a T-shaped nut on the installation seat works together with a side plate to form a clamping force for fixing the steam-sealing ring needing to be slicked; an inside bearing is pressed close to the inner-diameter teeth of the steam-sealing ring to follow up; an outside bearing is pressed close to the back arc shoulder of the steam-sealing ring to clamp the same; and the concentricity of the arc needing to be slicked and a shape following arc can be ensured via the shape-following slide of the inside bearing and the outside bearing. The device performs slicking for the gap of steam-sealing ring by using shape following principle, thereby overcoming the defect that manual slicking can not ensure the accuracy in the past, omitting the steps of fixing steam-sealing ring at first, then centring steam-sealing ring, and then adjusting machining amount of existing electric slicking, and overcoming the difficulties on centring for steam-sealing ring and guaranteeing the superposition of the circle centre of steam-sealing ring and the circle centre of slicking device.

Description

1. Technical field [0001] The invention is a kind of mechanical processing equipment, which adopts the principle of follow-the-shape profiling, and is suitable for adjusting the gaps of various steam turbine seal rings. 2. Background technology [0002] For steam turbines and gas turbines, in order to improve the efficiency of the unit and ensure its safe operation, the clearance of the seal ring must be adjusted during the overhaul. Adjusting the clearance of the seal ring is a delicate and arduous work. Currently, power plants across the country mainly adopt two adjustment methods. 1. Manual repair and scraping: For the steam seal ring that needs to be repaired and scraped, manually use a scraper to scrape off the required adjustment amount. Since the seal ring is generally 15CrMoA and has a high hardness, it is difficult to process and the accuracy is difficult to guarantee. 2. Electric repair and scraping: When using the original repair and scraping machine, it is nece...

AI Technical Summary

Problems solved by technology

In this process, it is difficult to find the center of the seal ring, and it is difficult to ensure that the center of the seal ring coincides with the center of the scraping device, and the work efficiency is low

Since the application manufacturer is a power plant and its geographical location is far away from the urban area, the gear scraping device often needs to be transferred and transported. The original scraping device has a complicated structure and heavy transportation cost.

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