Ukulawula ukucindezela okuguquguqukayo okuguquguqukayo nokulawula ukugeleza okungaguquki

Ukulawula ukucindezela okuguquguqukayo okuguquguqukayo nokulawula ukugeleza okungaguquki

b. Indlela eguquguqukayo yengcindezi ehlala njalo empompini eguquguqukayo eguquguqukayo ilawula ukugeleza kokuphuma kwepompo ngomehluko phakathi kokucindezela kokuphuma kwepompo kanye nenani elimisiwe lokucindezela kwendlela eguquguqukayo, ukuze kugcinwe ukucindezela kokuphuma kwephampu kunani elimisiwe. Le futha iyipompo ehlala njalo yokufuduka ngaphambi kokuba ingcindezi yesistimu ifinyelele inani elibekiwe, elihlinzeka ngokugeleza okuphezulu kwepompo ohlelweni; lapho ingcindezi yesistimu ifinyelela inani elibekiwe, ingcindezi yokuphuma kwayo ihlala njalo kungakhathaliseki ukuthi ukugeleza kokuphuma kushintsha kanjani, ngakho kubizwa ngokuthi ipompo eguquguqukayo yokucindezela njalo. Isici sokugeleza kwengcindezi yepompo sikhonjiswe kuMfanekiso P (a), futhi isimiso sokusebenza sendlela eguquguqukayo yengcindezi siboniswa kuMfanekiso P (b). Ingcindezi yokuphuma kwephampu yethulwa ekugcineni kwesokunxele se-pilot control spool valve 1 ukuze kwakheke i-hydraulic thrust PDAC, eqhathaniswa namandla FS entwasahlobo yokulawula ingcindezi ekugcineni. I-FS imele ingcindezi enikeziwe engu-P0 yepompo yengcindezi engaguquki, okungukuthi, P0 = FS / AC.

Lapho ingcindezi yokusebenza ye-PD yephampu ingaphansi kuka-P0, i-X yokuvula i-valve yesilayidi engu-1 ingu-O, futhi ingcindezi engu-P yesiphetho esikhulu sobubanzi be-piston eguquguqukayo engu-2 ingu-0. Iqhutshwa ukucindezela kawoyela PD kokuphela kobubanzi obuncane, i-piston 2 iphusha ipuleti lokugeza libe endaweni yobukhulu obungu-γ, ukuze kugcinwe ukugeleza okuphezulu kwepompo ye-Qmax ye-Figure Horizo (a)]. Lapho ukucindezela kokusebenza kwepompo kwenyukela kunani elinikeziwe lepompo, okungukuthi i-PD = P0, i-hydraulic thrust PDAC ekugcineni kwesokunxele se-valve yesilayidi 1 izonqoba amandla asentwasahlobo i-FS futhi ivule imbobo ye-valve ukuze yakhe i-orifice eguquguqukayo ngokuvula kwe-X, okwenza isekethe yokumelana nochungechunge ne-throttle egxilile K. Isifunda esihlukile sokulawula i-piston yokulawula i-piston ingasetshenziselwa ukulawula ukucindezela okukhulu kwe-2 inyuka, ingcindezi P iyanda. Uma u-x enyuka ngezinga elithile, ingcindezi engu-P ingaphusha i-piston ehlukile engu-2 ukuze iye phezulu futhi ishayele ipuleti lokugeza, ukuze γ inciphe futhi kunciphe ukugeleza kwepompo. Ngenxa yokuthi isilawuli se-valve yesilayidi esingu-1 esilawula umshayeli ayiphusheli ngokuqondile ipuleti lokugeza, kodwa silawula kuphela i-piston 2 ehlukile ephusha ipuleti lokuswasha, usayizi mncane kakhulu, ngakho ukuqina kwe-spring 3 nakho kuncane kakhulu. Ngakho-ke, lapho i-PD = P 0, ukuvulwa kwe-valve yokulawula 1 kungase kungabi khona emcabangweni, futhi isikhundla se-piston ehlukile ehlukile kanye ne-angle ye-swash plate nakho akunangqondo. Lokhu kusho ukuthi uma i-PD = P0, iphampu ingase isebenze kunoma yiliphi izinga lokugeleza phakathi kuka-q = 0 no-q = Qmax [umugqa wokucindezela njalo BC ku-Figure P (a)]. Uma umthwalo wangaphandle mkhulu kakhulu futhi ingcindezi yepompo PD> P0, iphampu ayikwazi ukusebenza. Ngoba lapho i-PD ifinyelela ku-P 0 futhi inomkhuba wokuqhubeka nokukhuphuka, ukuvula i-X yokulawula i-valve ye-spool 1 isivele ifinyelele umkhawulo ophezulu, futhi ingcindezi ekugcineni okukhulu kwepiston eguquguqukayo ehlukile nayo ifinyelele phezulu, futhi i-swashplate iphushwa endaweni ye-γ = O ukwenza ukuphuma kugeleze ziro. Ekusetshenzisweni okusebenzayo, kuyadingeka ukusebenzisa umthwalo ngokumelana ne-throttling kanye nepompo yokucindezela njalo ukuze usebenze endaweni yokucindezela okuqhubekayo. Amajika (1), (2) kanye (3) ku-Figure P (a) amajika esici sokugeleza kokugeleza kwemithwalo emithathu ye-throttling, enqamula umugqa wokucindezela oqhubekayo BC ku-D no-P. Isici somthwalo we-throttling ukuthi awudingi ukucindezela okungaguquki, ingcindezi yokusebenza ihambisana nokugeleza okuthile, futhi ukugeleza kuyanda ngokunyuka kwengcindezi. Ngale ndlela, amaphuzu e-intersection amaphoyinti D kanye no-e wejika lesici lokugeleza kwe-throttle (2) kanye (3) kanye nomugqa wesici sokucindezela okuqhubekayo (BC) wepompo yengcindezi eqhubekayo yizindawo zokusebenza ezinzile. Inqubo yokwenza lawa maphuzu okusebenza imi kanje: uma indawo yokusebenza iphazamisekile futhi ichezuka, isibonelo, indawo yokusebenza d iqhubekela endaweni d 'kanye nejika lesici lokugeleza kokumelana, ukugeleza kuyanda, nokucindezela kokusebenza kwepompo nakho kuphakeme kune-P0, okubhubhisa isimo sebhalansi yamandla okulawula isilayidi i-valve 1, bese ukugeleza kokugcina kwe-valve kukhuphuka nge-valve ehlukene i-piston eguquguqukayo, kanye nokuncipha kwe-engeli yepuleti lokugeza γ . Le nqubo yempendulo izoqhubeka kuze kube yilapho iphoyinti lokusebenza libuyela kuphoyinti lokuqala. Kungabonakala ukuthi i-pump eguquguqukayo eguquguqukayo eguquguqukayo inganikeza umthombo wamafutha ocindezela njalo ngengcindezi ye-P0. Umdwebo a uyijika lesici langempela lephampu eguquguqukayo yengcindezi eqhubekayo. Izici ezicindezelayo ezingapheli ezinezingcindezi ezahlukene zingatholakala ngokulungisa isiphethu sokulawula ukuze sishintshe i-FS. Iphampu eguquguqukayo eguquguqukayo eguquguqukayo ingasetshenziselwa ukugcina ingcindezi yesistimu ye-hydraulic, ukugeleza kokuphumayo kunxephezela ukuvuza kwesistimu kuphela; ingasetshenziswa njenge-oi yokucindezela njalol umthombo wesistimu ye-electro-hydraulic servo; ingasetshenziswa ohlelweni lokulawula isivinini se-throttle.

Uma indlela yokulawula ingcindezi ithathelwa indawo yizibuthe kagesi ezilinganayo futhi ivalvu yokulawula iyivalvu elinganayo ye-electro-hydraulic, iphampu yokulawula ukucindezela kwe-electro-hydraulic proportional eqhubekayo ingakhiwa. Ingcindezi yokusebenza yephampu ilingana namandla kazibuthe kagesi alinganayo.

c. Ishadi lokulawula ukugeleza okuqhubekayo Q libonisa isimiso sokulawula ingcindezi evamile uhlobo lwendlela yokulawula ukugeleza okuqhubekayo. I-orifice 2 ene-blade emincane isethwe ku-valve yokulawula ukugeleza okuqhubekayo njengento yokuthola ukugeleza, eguqula ukuguqulwa kokugeleza kusignali yokuguqula ingcindezi ukulawula indawo ye-spool 1. Uma ukuphuma kwangempela kokugeleza kwepompo kuncipha ngenxa yesizathu esithile, ingcindezi ehlukile Δ P (= p1-p) yembobo ye-throttle iyancipha, futhi amandla okunwebeka okukhulu kwe-spring 1 i-valve ye-hydrau inyakaza kwesokunxele. Ngakho-ke, uwoyela onengcindezi ephezulu esuka ku-port a ungena ekugcineni kwepiston yokulawula okuguquguqukayo engu-4 ngephaseji B, okwenza indlela eguquguqukayo inyakaze, ngakho ukugudluzwa kwepompo kuyanda. Ngenxa yokulawula ukugeleza okungaguquki, lapho iphampu isebenza ngaphansi kwanoma iyiphi ingcindezi (okungukuthi ukusebenza kahle kwe-volumetric), ukuphuma kwayo kungagcinwa njalo. Ngepompo ye-piston, ngenxa yokusebenza kwayo okuphezulu kwe-volumetric, lapho ijubane lihlala njalo, ebangeni elithile lokunemba, ukufuduka okuqhubekayo kunomsebenzi wokugeleza okuqhubekayo. Iphampu yokugeleza engaguquki ingagcina ukugeleza kokuphumayo kungaguquki ebangeni elithile lejubane lapho isivinini esishukumisayo sepompo yokushayela sishintsha kakhulu (njengenjini yomlilo yangaphakathi).