Turbine machine and mechanical axial displacement protection system thereof

Abstract

The invention discloses a turbine machine and an axial displacement protection system thereof. The system comprises a mechanical axial displacement protection device, a quickly-closed oil way and a turbine machine control device; the mechanical axial displacement protection device is opposite to a rotor and is coaxially fixed on a bearing seat of the rotor of the turbine machine, a through hole is formed in the bearing seat, and the through hole communicates with a lubricant oil way; the mechanical axial displacement protection device comprises a first oil hole communicating with an oil source and an oil drainage channel capable of communicating with the bearing seat according to position change conditions; and the quickly-closed oil way comprises a first valve and a first valve control part connected with the first valve, and the first valve is arranged on a fluid conveying channel of a fluid source and the turbine machine. According to the system, when the axial displacement of the rotor exceeds a threshold value, the fluid source for closing the turbine machine is triggered, so that the turbine machine is triggered to stop, and the damage to the turbine machine caused by axial displacement is avoided.

Description

technical field [0001] The invention relates to a mechanical axial displacement protection system, which can be applied to high-speed rotating turbomachinery such as steam turbines, compressors and blowers, and belongs to a part of the safety protection system of the unit. Background technique [0002] During the operation of the turbomachinery, due to the interaction between the rotor and the fluid, an axial force (hereinafter referred to as "axial force") will be generated, which will increase the load on the thrust bearing, and It may cause the rotor to move in the opposite direction of the fluid force, resulting in axial displacement, resulting in reduced life or even direct damage to equipment bearings, sealing parts, etc. destruction. In the prior art, the following two solutions are generally adopted to solve this problem: [0003] One is to provide corresponding balanced thrust to counteract the axial force, so as to avoid the occurrence of axial displacement; spec...

AI Technical Summary

Problems solved by technology

At present, there are usually only electronic axial displacement alarm devices in turbomachinery, but there are certain risks in electronic alarm trip devices in the industrial field. Once the axial displacement is too large, not only will the thrust bearing be burned, but also the dynamic and static clearance is relatively large. Small impellers and diaphragms cause great damage

[0005] In summary, the existing technical solutions can reduce the possibility of axial displacement to a certain extent, but when the axial displacement occurs, there are still certain technical defects in the shutdown protection system, which cannot fundamentally avoid the impact of axial displacement on equipment causing damage

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