Compact emergency governor

Abstract

The invention relates to a compact emergency governor. The compact emergency governor comprises a shell, wherein the shell is annular, a through groove is formed in the annular circumferential face of the shell, a flying ring is embedded in the through groove, and the flying ring is connected to the shell through a pin and swings in the through groove with the pin as the center; a hole is formed in the bottom of the through groove, a spring is arranged in the hole in a matched mode, the spring is fixed in the hole through a screw-in type screw, one end of the spring abuts against the screw-in type screw, the other end of the spring abuts against with one end of the flying ring, the other end of the flying ring makes contact with the shell, and the center of gravity of the spring and the center of gravity of the flying ring are located on the two sides of the pin respectively. Compared with the prior art, the requirement for perforating in rotors is avoided, and the strength of the rotors is guaranteed; the rotors are connected through keys so as to be fixed to one another, the probability that the compact emergency governor is applied on different rotors is achieved while the accuracy of connection between the compact emergency governor and the rotors is guaranteed, secondary utilization of the emergency governor is achieved, cost is reduced, and efficiency is improved.

Description

technical field [0001] The invention relates to an emergency protector, which is widely used in rotary turbomachinery such as steam turbines and compressors, and belongs to a part of the safety protection system of the unit. Background technique [0002] Turbine machinery such as steam turbines and compressors are high-speed rotating mechanical equipment. During normal operation, the emergency safety device works together with the adjustment system with hydraulic emergency cut-off throttle. When the load suddenly drops, the rotor speed increases rapidly, such as If the adjustment system does not move quickly, the rotor speed may rise to an unacceptable value, which will damage the rotor and even cause accidents such as damage to the unit. The emergency safety device is an overspeed protection device. When the rotor speed exceeds a certain speed, the emergency safety device operates. To quickly close the main steam valve, regulating valve and steam extraction check valve, cut...

AI Technical Summary

Problems solved by technology

[0003] At present, the emergency safety device commonly used in the market is an integral type emergency safety device. The structure is to drill holes on the rotor, install flyweights and springs in the holes, and fix the flyweights and springs in the holes through bolts, and then perform overspeed tripping tests. However, punching holes in the rotor will greatly reduce the strength of the rotor. If there are more complicated holes on the rotor, the possibility of scrapping the rotor will be greatly increased, which will increase the risk of equipment operation. Moreover, the integral emergency safety device It cannot be replaced directly. If it is replaced, the rotor must be scrapped

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