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Steam turbine with power failure self-starting emergency oil supply system and its working method

A technology of oil supply system and steam turbine, which is applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve problems such as limitations and dependence on electric drive, and achieve the effects of preventing major accidents, ensuring reliability, and improving safety production performance

Active Publication Date: 2016-03-02
JINAN DANENG POWER TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there have been researches on lubricating oil systems, such as patents CN201020636787 and CN200820156831, these studies are still limited to existing lubricating oil systems, and still rely on electric drive, which cannot completely avoid the occurrence of vicious accidents

Method used

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  • Steam turbine with power failure self-starting emergency oil supply system and its working method
  • Steam turbine with power failure self-starting emergency oil supply system and its working method
  • Steam turbine with power failure self-starting emergency oil supply system and its working method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] figure 2 Schematic diagram of the structure of the steam turbine provided by the present invention. image 3 The power failure self-starting emergency oil supply system 300 used in this embodiment includes an emergency steam source 1, a power failure emergency automatic start system 6, an auxiliary steam turbine 10 and a centrifugal oil pump body 14, and the power failure emergency automatic start system 6 is set on the steam pipeline 2 connected to the emergency steam source 1, and the power failure emergency automatic start system 6 includes the electromagnetic pneumatic linkage door and the quick-closing main steam door 4 in series. The auxiliary steam turbine 10 is connected on a shaft by means of a coupling 13 and an oil pump body 14, and is mounted on a steel base 8 together. Auxiliary steam turbine 10, shaft coupling 13, centrifugal oil pump body 14 and related steam pipeline 2, oil inlet pipeline 16, oil supply pipeline, related valves, related instruments, et...

Embodiment 2

[0048] like Figure 4 and Figure 5 As shown, in order to improve the reliability of the system, this embodiment adds a speed constant speed mechanism 7 to the above-mentioned power-off self-starting emergency oil supply system, and the speed constant speed mechanism 7 is connected to the power-off emergency automatic start system 6 and the auxiliary steam turbine 10. Between the steam inlet ends, the speed constant speed mechanism 7 includes a steam inlet regulating valve, and the speed constant speed mechanism 7 uses the speed signal fed back by the auxiliary steam turbine 10 as a control signal to control the auxiliary steam turbine 10 by changing the opening degree of the steam inlet regulating valve. The purpose of steam intake.

Embodiment 3

[0050] like Figure 6 As shown, the system is further equipped with an experimental system to ensure that the system can be put into operation at any time. In the experimental system, a circulation loop is set at the outlet of the emergency oil pump, which is connected to the main oil tank of the original steam turbine. Ensure that an independent circuit is formed between the outlet and inlet of the centrifugal oil pump during the experiment, which does not affect the safe operation of the lubricating oil system of the original steam turbine.

[0051] Wherein, the experimental system includes an experimental oil tank 17, a self-circulating lubricating oil pipeline, a check door and a manual gate.

[0052] On the inlet and outlet pipelines of the emergency gasoline-driven oil pump, the experimental pipelines are respectively connected to form self-circulating lubricating oil pipelines, which are all connected to the experimental oil tank 17. The specific layout of the inlet an...

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PUM

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Abstract

The invention discloses a steam turbine with a power-losing self-start emergency oil supply system and a work method of the steam turbine. The steam turbine with the power-losing self-start emergency oil supply system comprises a steam turbine body, a lubricating oil system and the emergency oil supply system, wherein the power-losing self-start emergency oil supply system and the lubricating oil system are connected in parallel. The steam turbine is characterized in that the power-losing self-start emergency oil supply system comprises an emergency steam source, a power-losing emergency automatic start system, an auxiliary steam turbine and a centrifugal oil pump body, the power-losing emergency automatic start system is arranged on a steam pipeline connected with the emergency steam source, and the power-losing emergency automatic start system comprises an electromagnetic pneumatic linkage door and a quick closing main steam door which are connected in series. Reliability of the steam turbine is guaranteed, lubricating oil can be effectively provided during outage, it is guaranteed that the steam turbine can be safely stopped when a rotor is in an idling curve, major accidents are prevented, and safe production performance of a power plant is improved.

Description

technical field [0001] The invention relates to the field of thermal power generation, in particular to a steam turbine with a power failure self-starting emergency oil supply system. Background technique [0002] In the field of thermal power generation, the steam turbine is one of the important devices. Its function is to use hot steam to do work and convert heat energy into mechanical energy to generate electricity. The steam turbine lubricating oil system is an important part of the steam turbine in the power plant, which mainly includes AC oil pumps and DC oil pumps. The steam turbine lubricating oil system plays a very important role in the steam turbine system. Its task is to reliably provide qualified lubricating oil to the bearings (including support bearings and thrust bearings) and barring devices of the steam turbine generator set in the power plant, and take away the main Heat generated by conduction, friction and turbulence of steam through shafts. When the A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D25/20F01D15/08F01D21/00
Inventor 成渫畏段君寨孙奉仲
Owner JINAN DANENG POWER TECH