Blast furnace blower lubricating oil emergency replenishment and pressure maintenance system

Abstract

The invention relates to a blast furnace blower lubricating oil emergency supplementing and pressure maintaining system, and belongs to the field of electromechanical integration. The system comprisesan emergency oil storage device and an on-off device, wherein the emergency oil storage device comprises an oil storage tank and an oil supplementing tank capable of supplementing the oil storage tank with oil; a liquid level meter is arranged on the oil storage tank; the oil storage tank communicates with an external compressed air source; set air pressure is kept inside the oil storage tank; and the pressure value of the set air pressure is greater than that of the lowest oil pressure in a lubricating oil pipeline. The equipment is pneumatically propelled and rapid in response, so that therapid supplementing and pressure maintaining requirements can be completely met; when a mother tube is supplemented with lubricating oil, the explosive force can be greater and the pressure maintaining function can be achieved; and by the utilization of the combined linkage action of a liquid level switch and the on-off device, the oil output from the oil storage tank can be automatically cut offand the air-in-oil accident caused by the entry of low-liquid-level air into the oil pipeline can be prevented.

Description

technical field [0001] The invention relates to a blast furnace blower lubricating oil emergency supplement and pressure maintaining system, which belongs to the field of electromechanical integration. Background technique [0002] The normal operation of industrial turbine large rotary blower units requires a certain pressure and flow of lubricating oil to lubricate and cool the rotor bearings, which is an indispensable auxiliary medium for rotating machinery. The working pressure of the lubricating oil system of the blast furnace blower steam turbine of Meishan Iron and Steel Co., Ltd. No. 3 blast furnace is 0.265 MPa. Two electric oil pumps, one on and one on standby, supply oil to the shafting of the unit during normal operation. When an electric oil pump fails and the output is insufficient, the pressure will drop, and when the pressure drops to 0.2MPa, the backup pump will start. [0003] Since it takes about 3 seconds for the backup pump to start to establish normal ...

AI Technical Summary

Problems solved by technology

[0003] Since it takes about 3 seconds for the backup pump to start to establish normal pressure, the lubricating oil pressure has no power source during this period and will continue to drop. When the pressure drops to 0.15MPa, it will trigger a low lubricating oil pressure protection trip, and it is even possible Accidents causing damage to steam turbine shafting

In order to solve the hidden danger of accidents caused by the stand-by pump being too slow to build up pressure and having no power for 3 seconds, it is necessary to invent a quick supplementary pressure-holding device for the lubricating oil pressure of the unit

Images