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A control strategy for wind turbine pitch centralized lubrication system

A wind turbine and centralized lubrication technology, which is applied in the control of wind turbines, monitoring of wind turbines, wind power generation, etc., can solve the problems of easy accumulation of grease, easy overflow, high failure rate of lubrication system, etc., and achieve the effect of avoiding overflow

Active Publication Date: 2021-11-02
CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention proposes a control strategy for the centralized lubrication system of the pitch change of wind turbines to solve the problem in the prior art that the centralized lubrication system adopts the method of timing lubrication, and the lubricating grease is easy to accumulate inside the bearing pipe, and it is easy to Spillage, technical problems with a high incidence of lubrication system failures

Method used

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  • A control strategy for wind turbine pitch centralized lubrication system
  • A control strategy for wind turbine pitch centralized lubrication system
  • A control strategy for wind turbine pitch centralized lubrication system

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0048] In this embodiment, the main control system of the wind turbine is used to control the lubricating pump, and the special circuit board is no longer used to control the lubricating pump, which can reduce the control links of the lubricating pump and reduce the occurrence rate of hardware failures of the lubricating pump, thereby reducing Incidence of lubrication system failures. Specifically, the main control system can control the start and stop of the lubricating pump by controlling the power relay of the lubricating pump to be turned on and off.

[0049] The control strategy of the centralized lubrication system is no longer injecting grease regularly, but injecting grease according to the operation of the fan, as follows:

[0050] 1. Lubrication pump start conditions

[0051] The process of starting the lubrication pump is as follows: figure 2 As shown, the main control system will have the average wind speed threshold preset by the user according to the actual situ...

Embodiment 2

[0080] The high failure rate of the lubrication system is also manifested as clogging. In order to solve the above technical problems, the following technical solutions are adopted for further optimization on the basis of Example 1:

[0081] When the main control system detects that the plunger of the grease distributor does not operate within a certain period of time, it uses forced grease injection to increase the pipeline pressure of the lubrication system; the lubrication pump is also connected to an oil return pipe.

[0082] Clogging At high pressure, the risk of clogging can be minimized by unclogging it early on by pressurizing the line or grease distributor.

[0083] Specifically, the operation of the plunger of the grease distributor will push the grease, and the extrusion sensor will generate a pulse signal, and the main control system can judge whether the plunger is running by detecting the pulse signal. When the main control system detects that the plunger of the ...

Embodiment 3

[0087] For the technical solution of embodiment 2, there is also the situation that the forced grease injection method does not break through the blockage. In this case, manual troubleshooting is required. In order to remind the maintenance personnel of wind turbines to troubleshoot in time, the following technical solutions are adopted:

[0088] If the main control system detects that the plunger of the grease distributor does not operate within a certain period of time, it will trigger a clogging warning; when the clogging warning is reset remotely once, if the operation status of the lubrication pump does not trigger the clogging warning again, the number of clogging warning resets will be cleared And the alarm is eliminated; after the clogging warning is reset remotely once, if the operation status of the lubricating pump continues to trigger the clogging warning and the clogging warning continues for a certain number of days, the main control system will upgrade the clogg...

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Abstract

The present invention provides a control strategy for a centralized lubrication system for variable pitch of wind turbines. The determination process of the start-up conditions of the lubrication pump is as follows: when the actual average wind speed is greater than the preset average wind speed threshold, the lubrication pump is not started; when the wind turbine is in the power generation state, Do not start the lubricating pump; if the current time is within the allowable operating time of the lubricating pump, the main control system controls the lubricating pump to start; the operation procedure of the lubricating pump is as follows: the user sets the number of standard lubrication strokes and the standard lubrication cycle; the main control system determines the lubrication pump According to the starting conditions, control the start of the lubrication pump; according to the standard number of lubrication strokes and the read actual number of lubrication strokes, the standard lubrication cycle and the read actual lubrication time, combined with the start conditions of the lubrication pump, control the continuous operation and stop of the lubrication pump. The invention can solve the technical problems that when the centralized lubricating system adopts the regular lubricating mode, lubricating grease is easy to accumulate and overflow inside the bearing pipeline, and the failure rate of the lubricating system is high.

Description

technical field [0001] The present invention relates to the technical field of wind power generators, in particular to a control strategy for a centralized lubrication system for variable pitch of wind power generators. Background technique [0002] In the prior art, there are generally three pitch bearings for wind turbines, and each bearing has 11 lubrication points, including 10 lubrication points for the bearing raceway, 1 lubrication point for the inner ring gear of the bearing, and a total of 11 lubrication points for the three-sided bearing. It is 33. For the progressive pitch variable centralized lubrication system, the blockage of each lubrication point will lead to the failure of the lubrication system, and the probability of failure of the lubrication system is very high. A high failure rate can easily lead to insufficient bearing lubrication, resulting in adverse consequences of bearing damage. [0003] The current wind turbine pitch centralized lubrication sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D80/70F03D7/00F03D17/00
CPCF03D7/00F03D17/00F03D80/70Y02E10/72
Inventor 龚波涛李顺建冀满忠王尹陈庆曹亭王弟方
Owner CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP