Fully flexible support for steam turbine

Abstract

The invention provides a fully flexible support for a steam turbine. According to the fully-flexible support for the steam turbine, flexible plates are arranged at the front end and the rear end of a cylinder of the steam turbine; double-layer front flexible plates are arranged on the two sides of the front portion of the cylinder of the steam turbine respectively, an included angle between each double-layer front flexible plate and the axial direction of the steam turbine is kept at 45 degrees, single-direction lateral thrust smaller than 400 kg of a steam inlet pipeline of the steam turbine is borne, and the steam turbine is allowed to expand towards the front portion and the two sides at the same time; and a single-layer rear flexible plate is arranged on each of the two sides of the rear portion of the cylinder of the steam turbine, the cylinder of the steam turbine is allowed to expand towards the two sides, and single-layer rear flexible plates serve as dead points of overall axial expansion of the steam turbine. According to the invention, a conventional heavy bearing box supporting form is replaced, the functions of meeting the impact resistance requirement of ship steam turbine equipment, permitting three-way thermal expansion of a steam turbine, bearing certain lateral thrust of the steam inlet pipeline and the like are achieved, the hidden danger that the steam turbine is stuck due to thermal expansion is eliminated, the manufacturing cost of the steam turbine can be reduced, the weight of ship equipment is reduced in a breakthrough mode, and important support is provided for improving economic benefits or combat performance of ship transportation.

Description

technical field [0001] The invention belongs to the field of energy and power, in particular to a fully flexible support for a marine steam turbine. Background technique [0002] When designing the cylinder support of the steam turbine, it is necessary to consider factors such as the overall thermal expansion and local thermal expansion of the steam turbine, the force of the pipeline, and impact resistance. If the thermal expansion of the steam turbine is not smooth or sufficient, it will be difficult to start or the vibration will be abnormal. [0003] There are generally three types of support structures for steam turbine cylinders: one is that the rear end of the steam turbine cylinder is provided with a flexible plate, and the front end is supported by a bearing box and a combination of cat claw structures; A sliding pin mechanism is provided at the front end of the cylinder of the steam turbine, and a bearing box support is provided at the rear end. These three common ...

AI Technical Summary

Problems solved by technology

These three common forms all have a bearing box support as the dead point of the thermal expansion of the steam turbine cylinder. The bearing box is generally welded or cast with steel plates, and it is heavy; according to a large number of operating examples, the sliding pin mechanism or cat claw structure often appears The thermal expansion of the steam turbine is not smooth or stuck, which causes the abnormal vibration of the steam turbine; in addition, when the steam turbine is subjected to asymmetric pipeline force, the sliding pin mechanism and the cat claw structure are more likely to get stuck or stuck

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