Hydraulic pumps na hydraulic motors ku chisarwa

Kwadalwa ngo 05.13

Hydraulic pumps na hydraulic motors ku chisarwa

① Imejimo yokuxhuma yephampu kawoyela kufanele icatshangelwe. Ngokuvamile, kukhona izinhlobo ezimbili zephampu kawoyela, umjovo kanye neflange. Ukukhetha kufanele kwenziwe ngokwezimo zokusebenza kanye nezimo kanye nokukhululeka kokugcinwa.

② 规模和重量随着现代机械设备的小型化和轻量化，在许多应用中，液压泵所需的功率是否能够安装在某个空间是选择泵的重要因素，重量也可能发挥同样的作用，例如航空航天设备。

③ Umgangatho kunye nokucoca kwemithombo yokusebenza kukhuseleko lokuqinisekisa ukusebenza okuqhelekileyo kwepompo ye-hydraulic kunye ne-system ye-hydraulic yonke kwaye wandise ubomi benkonzo ye-pompo. Umthombo wokusebenza wepompo ye-hydraulic ngokuqhelekileyo ufana nolwembalela lwe-system ye-hydraulic yonke. Okwangoku, umthombo wokusebenza we-system ye-hydraulic uninzi lusebenzisa i-mineral hydraulic oil (i-oil ye-mechanical, i-oil ye-turbine, i-oil ye-hydraulic ejolise, njl.), i-flame retardant hydraulic oil (i-oil kwi-emulsion yamanzi, amanzi kwi-emulsion ye-oil, i-water glycol liquid kunye ne-phosphate liquid, njl.) kunye ne-hydraulic oil ekhethekileyo. Iimfuno ezijolise kumthombo wokusebenza ziboniswa kwi-schedule. Iimeko ezimele ziqwalaselwe ekukhetheni umthombo wokusebenza we-hydraulic ziquka imozulu yokusebenza (ukuthintela umlilo, ubungozi, iphunga, njl.), iimeko zokusebenza (i-viscosity, umphakamo wesistim, ubushushu, isantya, njl.), umgangatho we-oil (i-physicochemical index, ukuxhaswa, i-antirust, njl.) kunye nomnotho (ixabiso, ubomi benkonzo, njl.). Phakathi kwezi zinto, eyona ibaluleke kakhulu kukuvuthwa komthombo. Nangona zonke iintlobo zeemveliso ze-hydraulic zichaze i-hydraulic fluid efunekayo, i-pompo ye-hydraulic yinxalenye enzima kakhulu kwi-system yonke (hhayi kuphela umphakamo, isantya kunye nobushushu buphezulu, kodwa kunye nomphunga ucuthelekiswa xa ufakwa kwaye uphume kwi-pompo). Ngoko ke, i-viscosity kunye nohlobo lwe-hydraulic fluid lungachazwa ngokweemfuno ze-pompo. Ngeli xesha, i-properties zokuthintela ukonakala kufuneka ziqwalaselwe kakhulu. I-odolo yokusebenza yokuthintela ukonakala kwepompo ye-hydraulic yi-vane pump > plunger pump > gear pump, ngoko ke i-HM oil kufuneka ikhethwe kwi-system ye-hydraulic enevane pump njengompompo ophambili, kungakhathaliseki umphakamo; i-HM oil kufuneka ikhethwe kwi-system ye-hydraulic enepump ye-plunger njengompompo ophambili, kwaye i-HL oil ingakhethwa kumphakamo ophantsi. Ngokweemfuno ze-pompo ukuchaza i-viscosity kunye nohlobo lwe-hydraulic oil, ungajolisa kwi-tafula elandelayo. I-oil ekhethwe ngokwe-pompo ngokubanzi iyasebenza kwiimotor ze-hydraulic kunye nezinye iindawo ze-hydraulic (ukukhupha i-proportional valve kunye ne-servo valve).

Izimfuno ezijwayelekile zokusebenza kwemidiya

序列号	projekti	序列号	projekti
moholo	适合的粘度：受温度变化影响较小，一般运动粘度 v = (11.5 ~ 41.3) × 10-6m2 / s	tshebe	Izinto ezinhle zokulwa ne-foam kanye nezakhiwo zokulwa ne-emulsifying, ukuhambisana okuhle nezinsimbi nezivamvo.
mbili	Good lubricity: the oil film produced by oil lubrication has high strength to avoid dry friction	six	Iziphumo zikhombisa ukuthi i-volumu yokwandisa i-coefficient iphansi, i-specific heat capacity kanye ne-heat transfer coefficient ziphansi, iphuzu lokugeleza kanye nephuzu lokuqandiswa ziphansi, kanti iphuzu lokukhanya kanye nephuzu lokuvutha ziphansi.
thrice	Pure texture, no corrosive substances and other debris	sebe	Good filterability: particulate pollutants in the working medium can be easily filtered through the filter screen to ensure high cleanliness
nane	Zakanaka kemikari kugadzikana: mafuta haasi nyore kuoxidize, haasi nyore kuora, saka kuti asagadzira sediment inonamira, kukanganisa basa resisitimu, uye mafuta achava neacidic mushure mekuoxidize, izvo zvichakuvadza pamusoro pemagetsi.	nane	Iku ayinzima futhi ayinobungozi emzimbeni womuntu

Ngokwehlobo kanye ne-viscosity ye-hydraulic oil ekhethiwe yi-hydraulic pump

Hydraulic pump type	Pressure / MPa	Kinematic viscosity V / mm2 · S-1 at 40 ℃		Applicable variety and viscosity grade
Hydraulic pump type	Pressure / MPa	5～40℃	40～80℃	Applicable variety and viscosity grade
Vane pump	＜7	33~50	40~75	HM mafuta: 32, 46, 68
Vane pump	＞7	50~70	55~90	HM mafuta: 46, 68, 100
Screw pump		30~50	40~80	HL mafuta: 32, 46, 68
Gear pump		30~70	95~165	HL mafuta (km ya shinikizo la kati na juu): 32, 46, 68, 100, 150
Axial piston pump		ama-40	70~150	HL mafuta (HM ye high pressure): 32, 46, 68, 100, 150
Radial Piston Pump		30~50	65~240	HL mafuta (HM ya shinikizo kubwa): 32, 46, 68, 100, 150

Umsebenzisi angakhetha futhi imithombo yokusebenza ngokuhambisana nekhadi lokukhetha uwoyela elinikezwe umkhiqizi wepompo esampulini yomkhiqizo. Isithombe g sikhombisa umdwebo wokukhetha uwoyela wepompo ye-hydraulic, okhombisa ibanga lokushisa (abscissa) (- 25 ~ 90 ℃), ibanga elilinganiselwe le-viscosity ye-kinematic (ordinate) (LO ~ loo mm2 / s) kanye nebanga elingcono lokusebenza le-viscosity (Vopt) (ingxenye ethulile esithombeni) (Vopt = 16 ~ 36 mm2 / s). I-viscosity encane Vmin = 10mm2 / S iyisivumelwano ngaphansi kokushisa kwe-90 ℃ uwoyela isikhathi esifushane, kanti i-viscosity enkulu Vmax = 1oomm2 / S iyisivumelwano ngaphansi kokushisa okuphansi kwesikhathi esifushane. Ukuze ukhethe kahle i-hydraulic fluid, ubudlelwano phakathi kokushisa kokusebenza (ivuliwe) kanye nokushisa kwemvelo kwe-oyela esitsheni se-oyela se-hydraulic system kumele kube waziwe (kubalwa) ngaphambi. Uwoyela okhethiwe kufanele uqinisekise ukuthi i-viscosity yokusebenza isendaweni engcono (Vopt) ngaphakathi kwebanga lokushisa lokusebenza. Ngokuvamile, ibanga le-viscosity eliphezulu elingaba khona kufanele likhethwe kuyo yonke isimo. Isibonelo, ngaphansi kokushisa kwemvelo okuthile, ukushisa kwe-oyela kokusebenza kwesitsha se-oyela ku-60 ℃, futhi i-viscosity ehambelana nebanga elingcono lokusebenza le-viscosity (Vopt) yi-HM46 kanye ne-hm68, khona-ke uwoyela we-hm68 uyakhethwa. Ngesikhathi sokusebenzisa umdwebo wokukhetha uwoyela, kufanele kuqashelwe ukuthi ukushisa kokukhishwa kwesikhumba akuhlali kuphezulu kunokushisa kwe-oyela kwesitsha se-oyela, okuthonywa ngengcindezi yokusebenza kanye nesivinini se-pump. Nokho, ukushisa okuphezulu kwanoma iyiphi ingxenye yesistimu akufanele kube phezulu kuka-90 ℃.

由于水液压技术在节能、环保和阻燃方面的优势，纯水液压技术近年来得到了快速发展。国外有一系列液压泵和液压马达可供使用，如丹佛斯液压泵和液压马达（图h）、Hauhinco液压泵（图I）。在使用液压泵和液压马达时，我们应了解纯水工作介质与液压油之间的性能差异（下表）及其优点。同时，我们应注意水介质造成的材料腐蚀和老化、泄漏和磨损、气蚀和冲击、振动和噪音等问题。

性能比较：纯水与液压油

性能	Hydraulic fluid	pura wato
Density / kg · M-3	850~900	umthousand
Compressibility / MPa	7×10-4	5.2×10-4
热膨胀系数/K-1	(6.3～7.8) ×10-3	1.8×10-3
比热容/kJ·kg-1·K-1	1.7～2.1	4.18
热导率/W·m-1·K-1	0.12～0.15	0.6
黏度/mm²·s⁻¹	20～50	0.5～1
饱和蒸汽压/Pa	1.2×104	1.0×103
声速/m·s-1	1330	1480
润滑性	好	差
锈蚀性	弱	强
抗燃性	差	强
导电性	差	强
uodong, dux性 he chucang tezheng	有味，有的有毒，不便储存	无味、无毒，无需回收

④ 经济（购买成本）液压泵的购买成本将作为选择条件与其他条件进行权衡。通常，在一定排量的条件下，齿轮泵是最便宜的，柱塞泵是最贵的，而叶片泵介于两者之间。

⑤ Ukufaneleka kubhekisela ekutheni ipompo ye-hydraulic iyavumelana yini nezindlela zokusebenzisa zabantu futhi ukuthi ingashintshwa yini nemikhiqizo efanayo.

⑥ Ukukhululeka kokugcinwa kufanele kuqinisekiswe ngokuphelele. I-hydraulic pump esetshenzisiwe kufanele ibe lula ukuyigcina emsebenzini nasendaweni, kube lula ukuthola abaphuli futhi kube nokwanele kokuhlinzeka.

⑦ Ukuphakela kanye nomlando wemikhiqizo kufanele kubheke ukuthi ingabe ipompo ye-hydraulic ekhethiwe ingatholakala ngokushesha, isikhathi esizothatha ukuthola izingxenye ezitholakalayo, ukusebenza kwepompo ezinhlelweni ezifanayo noma ezifanayo, ukusebenza komkhiqizo kanye nesimo somlando sokukhiqiza, ukusetshenziswa nokwamukelwa. Njengomklami, umsebenzisi kanye nomgibeli wesistimu ye-hydraulic, kufanele sibe nolwazi oluphelele lokwabiwa kwabakhi bendawo nabangaphandle (izinkampani) ze-pompo ye-hydraulic kanye nezinhlobo zomkhiqizo wabo, ukusebenza, insizakalo, idumela kanye nokushintshwa kwemikhiqizo emisha nezindala, ukuze sifeze ukukhetha okufanele nokufanele kwepompo ye-hydraulic.

Shiya imininingwane yakho futhi
sizokuthinta.

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