SF6 Density Relay Oil Leakage: Sababin da Dalilai Kamar Yadda Ake Samu Shaida da Bayanai Game da Hanyar Ƙaraƙara na Mai Zama Na Ƙaɗi

1. Bayani
Aikin SF6 na kayayyakin tsarin karamin gaba da kula-kula, ya zama da amfani a yankin kula-kula. Don haka, ya kamata a tuntubi masu gasar SF6 don in inganta aiki a cikin kula-kula. Yanzu, ana amfani da aikin pointer na kayan aiki don in bayyana alarm, lokotun, da kuma nuna a cikin yankin. Don in inganta aikin jirgin ruwa, akwai ruwan silicon a cikin duk waɗannan aiki.

Amma, fitaccen ruwa daga aikin density relays ita ce mafi nasara a yi, wanda yake faru ne a cikin abubuwa da kuma a cikin abubuwa mai girma—amman abubuwa mai girma suna da lokaci mai zuwa da kuma daraja mai yawa. Wannan batu ya zama matsalolin da take faru a cikin masu aiki da kula-kula na farko, wadanda ke tabbatar da aiki mai tsawon sadarwa na aikin.

2. Matsaloli Na Fitaccen Ruwa Daga Aikin Density Relays

• Jirgin Ruwa Mai Tsawo:
       Ruwan silicon ta ba damping. Idan ya faru duk, za a taka shi da aiki mai tsawo, takarda mai tsawo (ba a yi ko a yi), da kuma yanayin karshen marubuta a kan aiki na switch operations.

• Kokarin Oxidation Da Karkashin Aiki:
       Duk waɗannan aikin SF6 density relays sun amfani da contact na spiral spring mai kyauka, tare da kokarin aiki mai yawa, wanda ke kamar ruwan silicon don in koye hawa. Idan ya faru ruwa, za su fito a cikin hawa, wanda ke taimakawa a yi oxidation ko kuma koyar da abinci, wanda ke taimakawa a yi karkashin aiki ko kuma open circuits.

• Bayanin Test Field:
       Daga 196 aikin density relays da aka test a tafkin shekaru uku, six sun fi sanya aiki mai tsawo (kusan 3%), wadanda duka suke faru ruwan.

• Matsaloli Mai Yawa:
       Idan circuit breaker na SF6 ya faru gas, a lokacin da aikin density relay ya faru ruwa kuma baa ba zan iya bayyana alarm ko kuma lokotun, yawanci za a faru ayyukan a cikin tsakanin.

• Tsabtafi Aikin:
       Ruwan silicon da ya faru ta ba hawa, wanda ke taimakawa a yi koyar da abinci, wanda ke taimakawa a yi karkashin insulation performance da kuma aiki mai tsawo.

3. Tabbacin Dalilai Fitaccen Ruwa
Fitaccen ruwa ya faru ne a cikin hanyoyin haka:

• Hanyoyin koyar da terminal base da case

• Hanyoyin koyar da glass window da case

• Kudaden glass

3.1 Zinza-zinza Rubber Seal
Duk waɗannan koyarre sun amfani da nitrile rubber (NBR), wanda ke rubber mai tsawo da ke da aiki mai yawa saboda dalilai na iyaka da na gida.

Dalilai Gida:

• Yadda A Bude: Babban double bonds ta ba material mai yawa a cikin oxidation, wanda ke taimakawa a yi peroxides, wanda ke taimakawa a yi chain scission ko kuma cross-linking, wanda ke taimakawa a yi hardening da kuma embrittlement.

• Abubuwan Compound: Sulfur mai yawa a cikin vulcanization system ta ba aiki mai yawa.

Dalilai Iyaka:

• Oxygen Da Ozone: Farkon hawa ko oxygen/ozone a cikin oil ta ba oxidative reactions.

• Efekti Mai Tsayi: Idan tsayin 10°C, rate mai oxidation ta zama biyu.

• Mechanical Fatigue: Aiki mai tsayi na compressive stress ta ba mechanical oxidation, wanda ke taimakawa a yi aiki mai yawa.

3.2 Koyarren Initial Compression Mai Ba Aikin

• Compression Mai Ba:

• Matsaloli na design: section mai ba seal ko groove mai yawa.

• Matsaloli na installation: amfani da manual tightening ba da precise control.

• Efejin low-temperature: rubber ta fito da metal idan yake tsaye, da kuma harden a cikin low temperatures, wanda ke taimakawa a yi effective compression mai ba.

• Compression Mai Yawa:

• Za iya ba permanent deformation ko kuma generate high Von Mises stress, wanda ke taimakawa a yi early material failure.

3.3 Matsaloli Na Surfaces Da Installation Issues

• Scratches, burrs, surface roughness mai ba, ko kuma textures mai ba machining, za su ba leakage paths.

• Seals damaged by sharp edges during installation, causing hidden defects.

• Glass cracking causes:

• Uneven force application during installation;

• Cracking due to rapid changes in temperature or pressure.

4. Tushen Siffarwar

Siffarwar Fundamenta: Amfani Da Oil-Free, Anti-Vibration SF6 Density Relays
Wannan type ta taka risar da fitaccen ruwa ta hanyar innovation na structure.

Ficilolar Teknologi:

• Vibration Isolation Pad: An samu a cikin connector da case don in absorb shock energy from switching operations, achieving vibration resistance up to 20 m/s².

• Operating Principle: Amfani da Bourdon tube elastic element combined with a temperature compensation bimetallic strip to accurately reflect changes in SF6 gas density.

• Signal Output: Employs micro-switches actuated by the temperature compensation strip and Bourdon tube, enhanced by the vibration isolation pad, offering strong anti-interference capability and reduced risk of false operation.

Advantages:

• Completely eliminates the need for oil filling, thus preventing oil leakage at the source;

• Superior vibration resistance, suitable for high-vibration environments;

• High structural reliability and low maintenance cost;

• Direct replacement for existing oil-filled models, enabling "oil-free" upgrades.

Implementation Recommendations:

• Promptly replace any density relays exhibiting oil leakage;

• Prioritize oil-free, anti-vibration models during replacement;

• Conduct leak testing after replacement to ensure proper sealing.

5. Kammala

• Density na gas SF6 ita ce parametar mai muhimmanci don in inganta aiki mai tsawo, kuma ya kamata a tuntubi masu aiki mai inganci.

• Aikin density relays mai ruwa yanzu suke faru fitaccen ruwa, saboda zinza-zinza rubber seal, koyarren compression mai ba, da kuma matsaloli na installation.

• Fitaccen ruwa ta ba jirgin ruwa mai tsawo da kuma karkashin aiki, wanda ke taimakawa a yi ayyukan a cikin grid safety.

• Amfani da aikin SF6 density relays mai oil-free, anti-vibration ita ce siffarwar don in kiyaye aikin mai ruwa, wanda ke taimakawa a yi elimination of oil leakage da kuma inganta reliability da economic efficiency na system.