CN202547923U

CN202547923U - Vibration detecting device for pitch-variable bearing of wind turbine generator system

Info

Publication number: CN202547923U
Application number: CN2011205206572U
Authority: CN
Inventors: 高青风; 滕伟; 刘衍平
Original assignee: North China Electric Power University
Current assignee: North China Electric Power University
Priority date: 2011-12-14
Filing date: 2011-12-14
Publication date: 2012-11-21
Anticipated expiration: 2021-12-14

Abstract

The utility model belongs to the fault monitoring and diagnosis field of equipment driven by renewable energy sources and relates to a vibration detection device for the pitch-variable bearing of a wind turbine generator system, particularly a detection device for monitoring the actual operating state of the pitch-variable bearing of a wind turbine generator system and acquiring the vibration signal thereof. The device comprises a wind wheel hub and wind wheel blades, wherein the wind wheel hub and the wind wheel blades are connected together through a pitch-variable bearing. The outer periphery of the pitch-variable bearing is uniformly provided with three vibration sensors arranged at an angle of 120 degrees with respect to each other. The vibration sensors are connected with a data acquisition module and the data acquisition module is wirelessly connected with a computer. The distribution positions of the vibration sensors of the device on the outer periphery of the pitch-variable bearing can be correspondingly adjusted according to testing requirements. The detection device has the advantages of simple installation, convenient testing, timely and accurate data acquirement, and the like. Data acquired by the detection device are served as an important basis for the actual test analysis and fault diagnosis of the pitch-variable bearing of a wind turbine generator system.

Description

A kind of wind-powered electricity generation set pitch control bearing vibration detector

Technical field

The utility model belongs to regenerative resource equipment failure monitoring and diagnosis field; Be specifically related to a kind of wind-powered electricity generation set pitch control bearing vibration detector; Specifically relate to a kind of monitoring wind-powered electricity generation set pitch control bearing actual motion state, and obtain the pick-up unit of its vibration signal.

Background technology

Wind-powered electricity generation is one of main substitute energy that improves energy structure, reply climate change and energy security problem as renewable environmental type clean energy resource.China attaches great importance to the wind-power electricity generation industry, and the Denso machine capacity that blew from 2004 increased by 100% in continuous 5 years, had got into the stage of large-scale development.But wind power equipment manufactures and designs monitoring technology also has very big gap compared with developed countries; Pitch variable bearings is on the lower bearing of reliability, to have increased the gear ring that receives low-speed heave-load and shock load; Become one of mechanical part that failure rate is the highest in the wind-powered electricity generation unit; And the breakdown maintenance cycle is long, expense is high, has a strong impact on economy, reliability and the security of wind-power electricity generation.

The target of fault diagnosis is to find and discern fault as early as possible, carries out accurate localization of fault, and provides fault progression trend, and for reasonable maintenance and repair provides technical support, its main foundation is real-time vibration monitoring gained data and analytical technology.The pitch variable bearings fault will cause vibrational state to change, and just possibly find and discern fault through real-time monitoring analysis vibration signal.Domestic owing to wind power equipment design, manufacturing etc. are started late, pitch variable bearings is up to production domesticization in recent years, so its vibration monitoring and fault diagnosis technology relatively lag behind.Generally adopt the classical signals analytical approach for the ordinary turntable bearing; Mechanism of production according to vibration signal in its operational process; Utilize time domain average technology, spectrum analysis, cepstrum analysis and demodulation techniques etc. to extract the characteristic information of reflection bearing fault; Better effects is arranged, but because the pitch variable bearings own characteristic directly there is certain limitation in the application with ordinary turntable bearing detection method.

Pitch variable bearings is compared with other turntable bearings has following characteristics:

1) frequent variable load, wind wheel rotation, service condition, wind-force variation etc. cause the load frequent variations, change bigger sooner when particularly meeting with extreme weather;

2) work under hard conditions, long-term work in the open air, temperature, humidity change greatly and lubricating condition unfavorable;

3) structure space is limited, receives condition restriction such as unit layout, and bearing need be according to the designing requirement of blade and wheel hub, and the project organization space is limited;

4) maintenance maintenance difficulty, its working depth are generally more than 70 meters, and dismounting, maintenance are extremely inconvenient.

The utility model content

The purpose of the utility model is to compare to have with the ordinary turntable bearing to pitch variable bearings to work under hard conditions; Frequent variable load; The characteristics that structure space is limited and maintenance maintenance is difficult; Therefore the ruuning situation that adopts common vibration transducer to monitor pitch variable bearings in real time has certain circumscribed deficiency and a kind of wind-powered electricity generation set pitch control bearing vibration detector is provided, and it is characterized in that

The wind wheel wheel hub links to each other through pitch variable bearings with wind wheel blade, on the outer ring of pitch variable bearings, is 120 degree and is uniformly distributed with 3 vibration transducers, and vibration transducer is received data acquisition module; Data acquisition module is connected with computer radio.

Said pitch variable bearings is inlayed a row or two row's rolling bodys between outer ring and inner ring, to place retainer on the retainer circumference.

Said row's number of inlaying rolling body group of motors power with the wind is different and change to some extent.

The beneficial effect of utility model is that the utility model passes through the duty that vibration transducer is monitored pitch variable bearings in real time; The information of obtaining both can provide reference for normal operating condition; Also can in time find the abnomal condition and the prompting maintenance of bearing, in order to avoid cause bigger damage.This device vibration transducer can need adjust accordingly with test at the distributing position of pitch variable bearings outer ring; Have and simple, convenient test is installed, obtains data and promptly and accurately wait advantage, utilize the data of being gathered important evidence to be provided for the test analysis and the fault diagnosis of actual wind-powered electricity generation set pitch control bearing.

Description of drawings

Fig. 1 is that the parts of this vibration proving installation are formed and the hardware synoptic diagram;

Fig. 2 is a pitch variable bearings cut-away view among Fig. 1;

Embodiment

Below in conjunction with accompanying drawing and implementation flow process the utility model is elaborated.

The utility model is a kind of wind-powered electricity generation set pitch control bearing vibration detector; Parts are formed and gear case inner structure such as Fig. 1, shown in Figure 2; Among Fig. 1; Wind wheel wheel hub 101 links to each other through pitch variable bearings 103 with wind wheel blade 102, is 120 degree on the outer ring 202 of pitch variable bearings 103 and is uniformly distributed with 3 vibration transducers 104, and vibration transducer can need adjust accordingly with test at the distributing position of pitch variable bearings outer ring 202; The vibration signal that vibration transducer 104 is gathered in real time is input to data acquisition module 105; Be responsible for gathering and carrying out processes such as pre-treatment amplification, anti-aliasing filter by data acquisition module 105, finally convert accessible discrete digital signal into, be input to computing machine 106 and analyze.

Annotate: this covering device all should be in the inside of wheel hub 101, for convenient the displaying is plotted in the outside.

As shown in Figure 2, between outer ring 201 and inner ring 202, place retainer 204, on retainer 204 circumference, inlay a row or two row's rolling bodys 203.Rolling body 203 has a row, also has two rows, and row's number of inlaying rolling body 203 group of motors power with the wind is different and become to some extent.

Embodiment 1

As shown in Figure 1; After work such as the installation of this device, debugging are accomplished, think pitch variable bearings (rolling body, retainer, outer ring, inner ring) non-fault under blade gravity, centrifugal force, wind-force and change oar dynamic load effect, to be in good running status; Its vibration signal that is produced that rolls is passed to bearing outer ring 201; By 3 vibration transducer 104 picks up data on the solid bearing 103, and will pass to data acquisition module 105 and carry out processing such as preposition amplification, anti-aliasing filter, finally be input to computing machine 106; Analyze the vibration signal characteristics when pitch variable bearings normally moves under the various operating modes, as master sample.Along with the time operation is analyzed by certain hour rule extraction data acquisition module 105 gained signals; And compare with master sample; The vibration characteristic that compares non-fault signal and tape jam signal; Sum up the signal characteristic of various faults, for the fault diagnosis of further carrying out actual wind-powered electricity generation gear case provides reference.So that in time find the pitch variable bearings fault, and, has higher actual application value for its fault diagnosis provides important evidence.

Claims

1. a wind-powered electricity generation set pitch control bearing vibration detector is characterized in that the wind wheel wheel hub links to each other through pitch variable bearings with wind wheel blade, on the outer ring of pitch variable bearings, is 120 degree and is uniformly distributed with 3 vibration transducers, and vibration transducer is received data acquisition module; Data acquisition module is connected with computer radio.

2. according to the said wind-powered electricity generation set pitch control of claim 1 bearing vibration detector, it is characterized in that said pitch variable bearings is inlayed a row or two row's rolling bodys between outer ring and inner ring, to place retainer on the retainer circumference.

3. according to the said wind-powered electricity generation set pitch control of claim 2 bearing vibration detector, group of motors power is different and change to some extent with the wind to it is characterized in that said row's number of inlaying rolling body.