Turbine lubricating oil temperature online regulating device with precise temperature control

Abstract

A turbine lubricating oil temperature online regulating device with precise temperature control, the online regulating device is arranged on the oil inlet manifold of the lubricating oil, comprising:a fuel tank, an oil inlet pipe, an oil outlet pipe, a rectifier grid, a stirring rod, a heater, an evaporative cooling device, a temperature controller and the computer. The rectifier grid is arranged on the side of the oil tank near the oil inlet pipe, the fuel tank is arranged with a stirring rod and a heater extending into the oil tank, an evaporative cooling device is also arranged in the oiltank, and the heater and the evaporative cooling device are both in connected to the temperature controller and the computer. The turbine lubricating oil temperature online regulating device with precise temperature control can realize online real-time precise cooling of the lubricating oil. For example, during the start-up process, the unit speed is gradually increased, and the temperature of the lubricating oil is gradually increased. At this time, the temperature of the lubricating oil can be quickly reduced by the temperature control device. The system is simple, easy to install and uninstall, accurately controlling the temperature of the lubricating oil entering the bearing housing, reducing the lag of the adjustment time, and realizing online, real-time and precise temperature control.

Description

technical field [0001] The invention relates to the technical field of steam turbine auxiliary equipment, in particular to an online regulating device for lubricating oil temperature of a steam turbine with precise temperature control. Background technique [0002] As we all know, the lubricating oil of the steam turbine plays the role of lubricating the bearing bush and cooling the journal. If the oil temperature is too low, the viscosity of the lubricating oil will increase, and the oil film cannot be effectively established. The lubricating effect will not be achieved, and even vibration will be induced, which will affect the safe operation of the unit . If the oil temperature is too high, the viscosity of the lubricating oil will decrease, and it will not be able to cool down and effectively remove the heat generated by the friction between the rotating shaft and the oil film. Therefore, it is of great practical significance to accurately control the lubricating oil temp...

AI Technical Summary

Problems solved by technology

[0005] 1. The traditional method of adjusting the oil temperature is single. The temperature of the lubricating oil entering the bearing can only be heated by the heater in the main oil tank. There is no precise control of the heating target temperature. It only depends on the thermometer on the oil inlet pipe to judge whether the oil temperature is up to standard. Continue heating when the expected temperature is not reached, there is hysteresis

[0006] 2. The cooling of the oil depends on the return oil from the bearing and enters the oil cooler for cooling. The cooling temperature cannot be precisely controlled. Due to the limitation of the flow and temperature of the cooling water, the temperature of the lubricating oil is prone to overcooling or insufficient cooling.

[0007] It can be seen that the traditional method of adjusting oil temperature has low adjustment accuracy, long adjustment time, and is prone to under-adjustment or over-adjustment, which has certain potential safety hazards

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