Frequency conversion automatic control device and method of motor of shafting lubricating oil pump

Abstract

The invention provides a frequency conversion automatic control device and method of a motor of a shafting lubricating oil pump. The device comprises a sensor, a controller, a frequency converter anda contactor; the function of adjusting the flow and controlling frequency conversion output by using the shafting rotating speed is realized on the basis of automatically controlling the operation oftwo motors of the lubricating oil pump, and the device is used for providing the fine control requirements of lubricating oil according to the user requirements of a lubricating oil system under different operating working condition; the device has lubricating oil flow monitoring, fault alarming and manual emergency operation functions; and when the frequency converter breaks down, an input powersupply of a power grid is directly used as the power supply of the lubricating oil pump motors, so that the flow of a lubricating oil pipe is prevented from being out of control due to the failure ofthe lubricating oil system, maintenance personnel can be timely reminded to repair the frequency converter, and the equipment use reliability is further improved.

Description

technical field [0001] The invention belongs to the technical field of ship electromechanical control, and in particular relates to an automatic frequency conversion control device and control method for a shafting lubricating oil pump motor. Background technique [0002] The driving power of the ship during navigation comes from the propulsion motor driving the propeller to rotate through the shafting structure to generate propulsion power. The propulsion motor and shafting need lubrication and heat dissipation during operation. The shafting lubricating oil system uses the lubricating oil pump to The oil pipeline provides lubricating oil required for the propulsion motor and shafting, etc. Under the conditions of different speeds during the ship's navigation, there are certain differences in the demand of the shafting for lubricating oil: under the condition of high speed, the supply of lubricating oil with high flow rate is required; under the condition of low speed, the d...

AI Technical Summary

Problems solved by technology

After the existing lubricating oil pump motor control device takes power from the AC power grid, the quality of the output power is consistent with that of the power grid, and the output voltage and frequency remain unchanged. The lubricating oil pump only has one level of flow output, which cannot meet the fine design and use requirements of the lubricating oil system; and Unable to automatically switch control among multiple lubricating oil pump motors

Images