Adjustable gap seal and leakage treatment device

Abstract

The invention relates to an adjustable gap seal and leakage treatment device belonging to a main shaft seal device of a water turbine in a hydraulic turbine generator unit, especially to an adjustable gap seal and leakage treatment device of a water turbine main shaft in a horizontal hydraulic turbine generator unit. The device mainly includes a fixed type static sealing ring, an adjustable rotating sealing ring, a water-throwing ring fixedly arranged on the rotating sealing ring or a main shaft at outside of the rotating sealing ring, a shield and a water-receiving groove arranged on the shield. The device can control leakage of the main shaft sealing to minimum range, and thoroughly treats the leaked water, so that the leaked water can not enter into a bearing, and the hydraulic turbine generator unit can safely, stably and continuously operate with full load.

Description

Technical field [0001] An adjustable gap seal and water leakage treatment device belongs to a main shaft sealing device of a water turbine in a water turbine generator set, and in particular relates to an adjustable gap seal and a water leakage treatment device for a water turbine main shaft in a horizontal water turbine generator set. Background technique [0002] At present, the sealing device of the main shaft of the water turbine includes a packing sealing device in which sealing materials such as asbestos are pressed into the main shaft and the casing by a gland; a rubber flat sealing device composed of an anti-wear ring and a rubber plate; a rotating ring, a sealing block, Mechanical or hydraulic end face sealing devices composed of springs or pressure water; radial seals composed of carbon sealing blocks, top tightening blocks, springs, lubricating water pipes, etc., and water pump seals and other sealing devices. And there is also a sealing structure in which the gap...

AI Technical Summary

Problems solved by technology

Its shortcoming is that the rubber plate is a contact sealing structure. When it is damaged, a large amount of pressure water will be sprayed directly from the gap of the large circle, and then leak from the seal box and the main shaft, and fall from the seal box to the swivel cone. The water flow on the inner surface will be brought into the slope of the sealing box by the swivel, and flow from the slope to the surface of the main shaft and then leak out

In order to prevent water leakage from entering the bearing, part of the load of the turbine must be subtracted, so that the unit cannot run stably for a long time under full load

In addition, when the water leakage of the main shaft seal is too large, it will cause greater losses such as flooding the machine room and equipment.

However, the relative movement between the main shaft and the casing of the water turbine makes the water leakage problem of the main shaft seal unable to be completely solved so far.

Therefore, in the production of hydroelectric power generation, the leakage of the main shaft seal is still the biggest root cause of the unsafe, stable, continuous and full-load operation of the hydro-generator set so far.

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