Mechanical sealskuita basa rakakosha mukudzivirira kudonha kwemaindasitiri mazhinji akasiyana. Mumarine industry varikopombi mechanical zvisimbiso, inotenderera shaft mechanical seals. Uye muindasitiri yemafuta negesi munecartridge mechanical seals,kupatsanura ma mechanical seals kana yakaoma gasi mechanical seals. Mumaindasitiri emotokari mune mvura mechanical seals. Uye muindasitiri yemakemikari mune mixer mechanical seals (agitator mechanical seals) uye compressor mechanical seals.
Zvichienderana nekusiyana kwekushandisa mamiriro, inoda iyo mechanic yekuisa chisimbiso mhinduro nezvinhu zvakasiyana. Kune akawanda marudzi ezvinyorwa anoshandiswa munemechanical shaft seals akadai seceramic mechanical seals, carbon mechanical seals, Silicone carbide mechanical seals,SSIC mechanical seals uyeTC mechanical seals.
Ceramic mechanical seals
Ceramic mechanical seals zvinhu zvakakosha mumaindasitiri akasiyana ekushandisa, akagadzirirwa kudzivirira kubuda kwemvura pakati penzvimbo mbiri, senge shaft inotenderera uye imba yakamira. Izvi zvisimbiso zvakakosheswa zvakanyanya nekuda kwekupfeka kwavo kusamira, kusaita ngura, uye kugona kushingirira tembiricha yakanyanyisa.
Basa rekutanga receramic mechanical seals kuchengetedza kutendeseka kwemidziyo nekudzivirira kurasikirwa kwemvura kana kusvibiswa. Iwo anoshandiswa mumaindasitiri akawanda, anosanganisira oiri negesi, kugadzira makemikari, kurapwa kwemvura, mishonga, uye kugadzira chikafu. Kushandiswa kwakapararira kwezvisimbiso izvi zvinogona kuverengerwa nekuvakwa kwavo kwenguva refu; iwo akagadzirwa kubva kumberi ceramic zvinhu zvinopa epamusoro maitiro ekuita zvichienzaniswa nezvimwe zvisimbiso zvinhu.
Ceramic mechanical seals inoumba zvinhu zviviri zvikuru: imwe ndeyemakanika yakamira kumeso (inowanzo gadzirwa neceramic material), uye imwe ndeyemakanika rotary face (inowanzo vakwa kubva kucarbon graphite). Chiito chekuisa chisimbiso chinoitika kana zviso zvese zvakatsikirirwa pamwe chete uchishandisa simba remuchirimo, zvichigadzira chipingamupinyi chinoshanda kurwisa kubuda kwemvura. Sezvo midziyo ichishanda, iyo firimu yekuzora pakati pezviso zvekuisa chisimbiso inoderedza kupokana uye kupfeka uchichengetedza chisimbiso chakasimba.
Chimwe chinhu chakakosha chinoisa parutivi ceramic mechanical seals kubva kune mamwe marudzi ndiko kuramba kwavo kupfeka. Ceramic zvinhu zvine zvakanakisa kuomarara zvivakwa izvo zvinovatendera kuti vatsungirire abrasive mamiriro pasina kukuvara kwakanyanya. Izvi zvinoguma nezvisimbiso zvinogara kwenguva refu zvinoda kudzokororwa kana kugadziriswa zvishoma pane izvo zvakagadzirwa kubva kune zvakapfava.
Pamusoro pekuramba kupfeka, ceramics zvakare inoratidza yakasarudzika yekudziya kugadzikana. Vanogona kumira tembiricha yakakwira pasina kusangana nekudzikisirwa kana kurasikirwa nekuisa chisimbiso kwavo. Izvi zvinoita kuti dzive dzakakodzera kushandiswa mukupisa-kupisa kwepamusoro uko zvimwe zvisimbiso zvinogona kutadza nguva isati yakwana.
Chekupedzisira, ceramic mechanical seals inopa yakanakisa kemikari inoenderana, nekupokana nezvinhu zvakasiyana zvinoparadza. Izvi zvinovaita sarudzo inokwezva kumaindasitiri anogara achibata nemakemikari ane hutsinye uye mvura ine hutsinye.
Ceramic mechanical seals yakakoshachikamu zvisimbisoyakagadzirirwa kudzivirira kubuda kwemvura mumidziyo yeindasitiri. Zvimiro zvavo zvakasarudzika, zvakadai sekuramba kupfeka, kugadzikana kwemafuta, uye kuenderana kwemakemikari, zvinovaita sarudzo inosarudzika kune akasiyana maapplication mumaindasitiri akawanda.
| ceramic pfuma yemuviri | ||||
| Technical parameter | unit | 95% | 99% | 99.50% |
| Density | g/cm3 | 3.7 | 3.88 | 3.9 |
| Kuoma | HRA | 85 | 88 | 90 |
| Porosity rate | % | 0.4 | 0.2 | 0.15 |
| Kuputsika simba | MPa | 250 | 310 | 350 |
| Coefficient yekuwedzera kupisa | 10(-6)/K | 5.5 | 5.3 | 5.2 |
| Thermal conductivity | W/MK | 27.8 | 26.7 | 26 |
Carbon mechanical seals
Mechanical carbon seal ine nhoroondo yakareba. Graphite is isoform ye element carbon. Muna 1971, United States yakadzidza yakabudirira flexible graphite mechanic sealing material, iyo yakagadzirisa kubuda kweatomu simba revhavha. Mushure mekugadzirisa kwakadzika, iyo inoshanduka graphite inova yakanakisa yekuisa chisimbiso zvinhu, izvo zvinogadzirwa kuita akasiyana kabhoni mechanical seals nemhedzisiro yekuisa chisimbiso zvikamu. Aya carbon mechanical seals anoshandiswa mumakemikari, petroleum, magetsi emagetsi maindasitiri akadai sepamusoro tembiricha yemvura chisimbiso.
Nekuti iyo inochinjika graphite inoumbwa nekuwedzera kweiyo yakawedzera graphite mushure mekupisa kwakanyanya, huwandu hweiyo intercalating agent inosara mu flexible graphite idiki kwazvo, asi kwete zvachose, saka kuvepo uye kuumbwa kweiyo intercalation agent ine simba guru pamhando. uye kushanda kwechigadzirwa.
Kusarudzwa kweCarbon Seal face Material
Mugadziri wepakutanga akashandisa concentrated sulfuric acid se oxidant uye intercalating agent. Zvisinei, mushure mekushandiswa kune chisimbiso chechikamu chesimbi, zvishoma zvesarufa zvakasara mu girafu inoshanduka yakawanikwa yakasvibisa simbi yekubatanidza mushure mekushandisa kwenguva refu. Tichifunga nezvenyaya iyi, dzimwe nyanzvi dzemumba dzakaedza kuivandudza, dzakadai saSong Kemin akasarudza acetic acid uye organic acid pachinzvimbo chesulfuric acid. asidhi, inononoka mu nitric acid, uye inoderedza tembiricha kusvika kune tembiricha yekamuri, yakagadzirwa nemusanganiswa we nitric acid neacetic acid. Nekushandisa musanganiswa wenitric acid uye acetic acid semumiririri wekuisa, sarufa isina kuwedzera graphite yakagadzirwa ne potassium permanganate se oxidant, uye acetic acid yakawedzerwa zvishoma nezvishoma kune nitric acid. Tembiricha inoderedzwa kusvika mukamuri tembiricha, uye musanganiswa we nitric acid neacetic acid inogadzirwa. Ipapo iyo yakasikwa flake graphite uye potassium permanganate inowedzerwa kune iyi musanganiswa. Pasi pekusimudzira nguva dzose, kutonhora kunosvika 30 C. Mushure mokuita 40min, mvura inoshambidzwa kuti isarerekera uye yakaomeswa pa50 ~ 60 C, uye girafu yakawedzerwa inogadzirwa mushure mekuwedzera kwekushisa kwepamusoro. Iyi nzira haigone vulcanization pasi pemamiriro ekuti chigadzirwa chinogona kusvika kune imwe vhoriyamu yekuwedzera, kuitira kuti iwane yakagadzikana hunhu hwechisimbiso.
| Type | M106H | M120H | M106K | M120K | M106F | M120F | M106D | M120D | M254D |
| Brand | Impregnated | Impregnated | Impregnated Phenol | Antimony Carbon(A) | |||||
| Density | 1.75 | 1.7 | 1.75 | 1.7 | 1.75 | 1.7 | 2.3 | 2.3 | 2.3 |
| Fractural Strength | 65 | 60 | 67 | 62 | 60 | 55 | 65 | 60 | 55 |
| Compressive Strength | 200 | 180 | 200 | 180 | 200 | 180 | 220 | 220 | 210 |
| Kuoma | 85 | 80 | 90 | 85 | 85 | 80 | 90 | 90 | 65 |
| Porosity | <1 | <1 | <1 | <1 | <1 | <1 | <1.5 | <1.5 | <1.5 |
| Tembiricha | 250 | 250 | 250 | 250 | 250 | 250 | 400 | 400 | 450 |
Silicon Carbide mechanical seals
Silicon carbide (SiC) inozivikanwawo secarborundum, iyo inogadzirwa nejecha requartz, petroleum coke (kana marasha coke), huni machipisi (anofanira kuwedzerwa kana achigadzira green silicon carbide) zvichingodaro. Silicon carbide zvakare ine isingawanzo mineral mune zvakasikwa, mulberry. Mumazuva ano C, N, B uye mamwe asiri-oxide akakwira tekinoroji refractory mbishi zvinhu, silicon carbide ndeimwe yeanonyanya kushandiswa uye ehupfumi zvinhu, izvo zvinogona kunzi goridhe simbi jecha kana refractory jecha. Parizvino, kugadzirwa kwemaindasitiri ekuChina kwesilicon carbide yakakamurwa kuita nhema silicon carbide uye green silicon carbide, ese ari makristasi ane hexagonal ane chikamu che3.20 ~ 3.25 uye microhardness ye2840 ~ 3320kg/m².
Silicon carbide zvigadzirwa zvinoiswa mumhando dzakawanda zvichienderana neyakasiyana nharaunda yekushandisa. Inowanzoshandiswa zvakanyanya mechanically. Semuyenzaniso, silicon carbide chinhu chakanakira silicon carbide mechanical seal nekuda kwekunaka kwayo kemikari corrosion kuramba, kusimba kwepamusoro, kuomarara kwakanyanya, kupfeka kwakanaka kuramba, diki friction coefficient uye yakakwirira tembiricha kuramba.
SIC Seal zvindori zvinogona kukamurwa kuita static mhete, inofamba mhete, flat ring uye zvichingodaro. SiC silicon inogona kugadzirwa mumhando dzakasiyana dzecarbide zvigadzirwa, sesilicon carbide rotary ring, silicon carbide stationary seat, silicon carbide bush, zvichingodaro, zvinoenderana nezvinodiwa nevatengi. Inogonawo kushandiswa pamwe chete ne graphite zvinhu, uye friction coefficient idiki pane alumina ceramic uye yakaoma alloy, saka inogona kushandiswa mupamusoro PV kukosha, kunyanya mumamiriro easidhi yakasimba uye alkali yakasimba.
SIC yakaderedzwa kukweshera ndeimwe yemabhenefiti akakosha ekuishandisa mumakanika zvisimbiso. SIC saka inogona kumira kupfeka uye kubvarura zviri nani pane zvimwe zvinhu, kuwedzera hupenyu hwechisimbiso. Pamusoro pezvo, iyo yakaderedzwa kupokana kweSIC kunoderedza kudiwa kwekuzora. Kushaikwa kwemafuta kunoderedza mukana wekusvibiswa uye kuora, kuvandudza kushanda uye kuvimbika.
SIC zvakare ine kupikisa kukuru kwekupfeka. Izvi zvinoratidza kuti inogona kutsungirira kushandiswa nguva dzose pasina kuora kana kuputsika. Izvi zvinoita kuti ive yakakwana zvinhu zvekushandisa zvinoda mwero wepamusoro wekuvimbika uye kusimba.
Inogona zvakare kupetwa uye kukwenenzverwa kuitira kuti chisimbiso chigone kuvandudzwa kakawanda pamusoro pehupenyu hwayo. Inowanzo shandiswa zvakanyanya mumakina, senge mumakina zvisimbiso kune yakanaka makemikari corrosion kuramba, kusimba kwakanyanya, kuomarara kwakanyanya, kunaka kupfeka kuramba, kukwesha kudiki uye kupisa kwakanyanya.
Kana ichishandiswa mechanical seal faces, silicon carbide inoguma nekuvandudzwa kwekuita, kuwedzera kwehupenyu hwechisimbiso, kuderedzwa kwemitengo yekugadzirisa, uye kuderera kwemitengo yekutenderera yemidziyo inotenderera yakaita sematurbines, compressors, uye centrifugal pombi. Silicon carbide inogona kuva nezvinhu zvakasiyana zvichienderana nekuti yakagadzirwa sei. Reaction yakasungirirwa silicon carbide inoumbwa nekubatanidza silicon carbide zvimedu kune mumwe nemumwe mukuita maitiro.
Iyi nzira haina kunyanya kukanganisa zvakawanda zvemuviri uye zvinopisa zvinhu zvezvinhu, zvisinei zvinogadzirisa kupikisa kwemakemikari kwezvinhu. Mishonga inowanzoitika iyo iri dambudziko ndeye caustics (uye mamwe epamusoro pH makemikari) uye yakasimba acids, uye saka reaction-bonded silicon carbide haifanirwe kushandiswa nezvikumbiro izvi.
Reaction-sintered infiltratedsilicon carbide. Mune zvinhu zvakadaro, ma pores eiyo yekutanga SIC zvinhu anozadzwa mukuita kupinza nekupisa simbi silicon, nekudaro yechipiri SiC inooneka uye zvinhu zvinowana yakasarudzika michina zvivakwa, zvichiva kusakara. Nekuda kwekuderera kwayo kushoma, inogona kushandiswa mukugadzirwa kwezvikamu zvakakura uye zvakaoma nekushivirira kwepedyo. Nekudaro, iyo silicon yemukati inodzika iyo yakanyanya tembiricha yekushanda kusvika 1,350 ° C, makemikari kuramba anongogumira kune anenge pH 10. Izvo zvinhu hazvikurudzirwe kushandiswa munzvimbo dzine hutsinye alkaline.
Sinteredsilicon carbide inowanikwa nekunyudza pre-yakamisikidzwa yakanyatso nyoro SIC granulate patembiricha ye2000 ° C kuumba zvisungo zvakasimba pakati pezviyo zvezvinhu.
Kutanga, lattice inowedzera, ipapo porosity inoderera, uye pakupedzisira zvisungo pakati pezviyo sinter. Mukugadzirisa kwakadaro, shrinkage inokosha yechigadzirwa inoitika - inenge 20%.
SSIC chisimbiso mhete inoshingirira kumakemikari ese. Sezvo pasina simbi silicon iripo muchimiro chayo, inogona kushandiswa pakudziya kusvika 1600C pasina kukanganisa simba rayo.
| properties | R-SiC | S-SiC |
| Porosity (%) | ≤0.3 | ≤0.2 |
| Density (g/cm3) | 3.05 | 3.1~3.15 |
| Kuoma | 110~125 (HS) | 2800 (kg/mm2) |
| Elastic Modulus (Gpa) | ≥400 | ≥410 |
| SiC Content (%) | ≥85% | ≥99% |
| Si Content (%) | ≤15% | 0.10% |
| Bend Strength (Mpa) | ≥350 | 450 |
| Kudzvinyirira Simba (kg/mm2) | ≥2200 | 3900 |
| Coefficient yekuwedzera kupisa (1/℃) | 4.5×10-6 | 4.3×10-6 |
| Kuramba kupisa (mumhepo) (℃) | 1300 | 1600 |
TC mechanical chisimbiso
Zvigadzirwa zveTC zvine maficha ekuomarara kwepamusoro, simba, abrasion kuramba uye kusagadzikana kwekuora. Iyo inozivikanwa se "Industrial Tooth". Nekuda kwekuita kwayo kwepamusoro, yakashandiswa zvakanyanya muindasitiri yemauto, aerospace, mechanical processing, metallurgy, kuchera oiri, electronic communication, architecture nemamwe minda. Semuenzaniso, mumapombi, compressors uye agitators, Tungsten carbide mhete inoshandiswa semakanika zvisimbiso. Kuramba kwakanaka kweabrasion uye kuoma kwakanyanya kunoita kuti ive yakakodzera kugadzirwa kwezvikamu zvisingapfekere zvine tembiricha yakakwira, kukweshera uye ngura.
Zvinoenderana nekuumbwa kwayo kwemakemikari uye maitiro ekushandisa, TC inogona kukamurwa kuita zvikamu zvina: tungsten cobalt (YG), tungsten-titanium (YT), tungsten titanium tantalum (YW), uye titanium carbide (YN).
Tungsten cobalt (YG) yakaoma alloy inoumbwa neWC uye Co. Yakakodzera kugadzirisa zvinhu zvinoputika zvakadai sesimbi yakakandwa, simbi isina ferrous uye isiri-metallic materials.
Stellite (YT) inoumbwa neWC, TiC uye Co. Pamusana pekuwedzerwa kweTiC kune alloy, kupikisa kwayo kupfeka kunovandudzwa, asi simba rekukotama, kushanda kwekukuya uye kupisa kwekushisa kwakaderera. Nekuda kwehunyoro hwayo pasi petembiricha yakaderera, inokodzera chete kune yakakwira-kumhanya yekucheka zvinhu zvakajairika uye kwete yekugadzirisa brittle zvinhu.
Tungsten titanium tantalum (niobium) cobalt (YW) inowedzerwa kune alloy kuti iwedzere kupisa kwakanyanya kuoma, simba uye abrasion kuramba kuburikidza nehuwandu hwakakodzera hwetantalum carbide kana niobium carbide. Panguva imwecheteyo, iyo kuomarara zvakare inovandudzwa nekunaka kwakazara kwekucheka kuita. Inonyanya kushandiswa kune zvakaoma kutema zvinhu uye kucheka kwepakati.
Iyo carbonized titanium base class (YN) isimbi yakaoma ine chikamu chakaoma cheTiC, nickel uye molybdenum. Zvakanakira kuomarara kwakanyanya, anti - bonding kugona, anti-crescent kupfeka uye anti-oxidation kugona. Pane tembiricha inodarika 1000 madhigirii, inogona kuramba ichigadzirwa. Inoshandiswa pakuenderera-kupedzisa kwesimbi yealloy uye kudzima simbi.
| model | nickel content (wt%) | density (g/cm²) | kuoma (HRA) | kukotama simba(≥N/mm²) |
| YN6 | 5.7-6.2 | 14.5-14.9 | 88.5-91.0 | 1800 |
| YN8 | 7.7-8.2 | 14.4-14.8 | 87.5-90.0 | 2000 |
| model | cobalt zvemukati (wt%) | density (g/cm²) | kuoma (HRA) | kukotama simba(≥N/mm²) |
| YG6 | 5.8-6.2 | 14.6-15.0 | 89.5-91.0 | 1800 |
| YG8 | 7.8-8.2 | 14.5-14.9 | 88.0-90.5 | 1980 |
| YG12 | 11.7-12.2 | 13.9-14.5 | 87.5-89.5 | 2400 |
| YG15 | 14.6-15.2 | 13.9-14.2 | 87.5-89.0 | 2480 |
| YG20 | 19.6-20.2 | 13.4-13.7 | 85.5-88.0 | 2650 |
| YG25 | 24.5-25.2 | 12.9-13.2 | 84.5-87.5 | 2850 |