Large-axis peristaltic detection method applicable to power station unit

A technology for power station units and detection methods, which is applied in the direction of motor generator testing, the use of electrical devices, and the use of electromagnetic means, can solve problems such as hidden dangers in the operation of bearing bushes, and achieve the effect of advanced algorithms

Pending Publication Date: 2019-09-06
CHINA YANGTZE POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to provide a unit creep detection method, by accurately and effectively detecting the tiny creep of the unit, and quickly triggering the control process, to solve the technical problem that the creep of the unit will bring safety hazards to the operation of the bearing bush

Method used

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  • Large-axis peristaltic detection method applicable to power station unit
  • Large-axis peristaltic detection method applicable to power station unit
  • Large-axis peristaltic detection method applicable to power station unit

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Embodiment

[0046] like Figures 1 to 3 As shown, the number of speed-measuring toothed belts and empty slots of the large shaft of the Harbin Electric Group on the right bank of the Three Gorges are 80, the length of a single toothed belt: 50mm, the length of a single empty slot: 110mm, and the duty cycle is 0.31. The angle value of the center of the major axis corresponding to the arc length of a toothed belt plus the arc length of an empty slot:

[0047] φ=360° / 80=4.5°.

[0048] The angle value of the large axis center angle corresponding to the arc length of a single toothed disc: 4.5°*50 / 160=1.4°.

[0049] The angle value of the large axis center angle corresponding to the arc length of a single empty slot:

[0050] 4.5°*110 / 160=3.1°.

[0051] After analysis and calculation, six probes must be installed, and the distance between each probe is a multiple of 0.5°, so as to meet the national standard creep requirements. The identifiable domain of one cycle of the gear plate is 0.5*2=1...

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Abstract

A large-axis peristaltic detection method applicable to a power station unit is provided. The method comprises the following steps in use: 1) obtaining the respective number A of speed measuring toothed belts on a toothed disc and empty grooves in a power station unit speed control system, the length B of a single speed measuring toothed belt, and the length C of a single empty groove; 2)solving alarge-axis center angle value phi corresponding to the arc length of a toothed belt plus the arc length of an empty groove; 3) solving the large-axis center angle value corresponding to the arc length of a single toothed disc and the large-axis center angle value corresponding to the arc length of the single empty groove; and 4) determining the number of to-be-installed sensor probes through calculation, and arranging the sensor probes continuously around the toothed disc and at a distance D. In order to accurately, precisely and effectively monitor the peristaltic motion of a large-scale power station unit, the present invention provides a large-axis peristaltic detection method applicable to a power station unit.

Description

technical field [0001] The invention belongs to the field of power station units and their auxiliary equipment, and in particular relates to a large shaft creep detection method suitable for power station units. Background technique [0002] Unit creep detection device is one of the indispensable equipment for turbine automation. When the hydro-generator set is in the shutdown state, the movable guide vanes of the hydro-turbine are in the closed state. Due to the large number of guide vanes, there may be water leakage between the guide vanes. When the water leakage increases to a certain extent, the water flow impacts the turbine runner blades, which will cause the rotating parts of the unit to produce slow rotational motion, that is, the unit will creep. Phenomenon. The creep phenomenon of the unit is hidden, but it is a major hidden danger to the safe and stable operation of the turbine unit. If the creeping time of the main shaft of the unit is too long, it will easily ...

Claims

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Application Information

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IPC IPC(8): G01R31/34G01B7/30
CPCG01B7/30G01R31/34
Inventor 周立成白二邓友汉朱斌艾远高翟玉杰谭勇陈宇凡金笑笑李翰夫
Owner CHINA YANGTZE POWER
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