Automatic shutdown method of electric towing turbine unit in failure of controlling system and oil system
A turbine unit, automatic shutdown technology, applied in the direction of electrical program control, sequence/logic controller program control, etc., can solve problems such as lubricating oil system failure, safety accidents, and the unit cannot be automatically shut down immediately
Active Publication Date: 2015-07-08
XIAN SHAANGU POWER
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Problems solved by technology
However, there are some security risks in the above control method.
For example: when the low-voltage power supply 380V or 220V AC power supply of the motor drives the turbine unit is accidentally out of power, or the power supply of the automatic control system is out of power or the CPU crashes and other unexpected factors cause the lubricating oil pump to stop running, resulting in the pressure of the oil supply main pipe of the lubricating oil system being too low. If the automatic control system of the unit fails to work normally, the lubricating oil system will fail and the unit will not be able to stop automatically immediately, which will cause safety accidents
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[0017] For a conventional motor-driven turbo-compressor unit, the lubricating oil system is usually equipped with two mutually-based and standby lubricating oil pumps (1# lubricating oil pump, 2# lubricating oil pump), and the method of the present invention is to include 1# lubricating pump , The motor of 2# lubricating oil pump drives the turbine compressor unit as the object. Reference figure 1 , The automatic shutdown method of the motor-driven turbine unit of the present invention when the control system and the oil system fail, specifically includes the following steps:
[0018] The first step is to set a normally open pressure switch on the lubricating oil supply pipe of the motor-driven turbine unit at the far end of the unit, and set the lubricating oil shutdown pressure setting value (generally set according to the actual operating conditions of the unit). 80KPa), when the lubricating oil pressure drops to the set value, the pressure switch contact is closed.
[0019] Th...
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The invention discloses an automatic shutdown method of an electric motor towing turbine unit in failure of a controlling system and an oil system. A normally opened pressure switch is arranged on a lubricating oil supplying main pipe of the electric motor towing turbine unit, and when the pressure of the lubricating oil is as low as the preset value, the contact of the pressure switch is closed. A pressure switch normally closed contact of the lubricating oil supplying main pipe and a number 1 and number 2 lubricating oil pump motor alternating current contactor normally closed auxiliary contact which are sequentially connected in series are connected into a high-voltage control loop 220-V direct current power supply together with a tripping mechanism of a vacuum breaker to form a safe shutdown control loop. When the safe shutdown control loop is closed, the tripping mechanism of the vacuum breaker in an operation cabinet of the electric motor towing turbine unit is powered on, and the electric towing turbine unit is shut down in interlocking mode. Safe shutdown of the electric towing turbine unit is ensured when the control system and the oil system are failed, and the phenomenon of wrong shutdown caused by wrong operation of the alternating current contactor normally closed auxiliary contact of the pressure switch contact of the lubricating oil supplying main pipe or a lubricating oil pump motor is avoided.
Description
[0001] The invention belongs to the technical field of control systems for a motor-driven turbine unit, and relates to an automatic shutdown method for a motor-driven turbine unit when the control system and the oil system fail. Background technique [0002] The sliding bearing is usually selected for the motor driven turbine unit, and the sliding bearing needs to be lubricated by forced oil supply. Therefore, a lubricating oil system must be provided for the motor to drive the turbine unit. The main function of the lubricating oil system in the motor-driven turbine unit is to provide the unit with functions such as lubrication, cooling, and washing. When the lubricating oil system fails, if the unit is still running, it is very easy to cause damages such as high temperature of the unit bearing bush, burning of the bearing, damage to the thrust plate, and blade wear. In severe cases, it can cause the unit rotor to wear, the bearing cylinder deformation, and mechanical runaway. a...
Claims
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IPC IPC(8): G05B19/04
Inventor 王东升黄美春李勇田渭蓉张亚军张保平王航张武军谢涛张巍黄达王小军
Owner XIAN SHAANGU POWER