Hydraulic pumps na hydraulic motors ku chisarwa

创建于05.13

Hydraulic pumps ne hydraulic motors ka chayan

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

② Izi nosayizi kanye nesisindo sokunciphisa nokukhanya kwemishini yesimanje, ezinhlelweni eziningi, noma amandla adingekayo ophampu we-hydraulic angafakwa endaweni ethile kubalulekile ekukhetheni ophampu, isisindo singase sibe nendima efanayo, njengemishini yezokundiza.

③ Umgangatho kunye nokucoca komphunga osebenzayo kubalulekile ukuqinisekisa ukusebenza okujolise kumphunga we-hydraulic kunye nohlelo lwe-hydraulic lonke kwaye wandise ubomi benkonzo yomphunga. Umphunga osebenzayo wombhobho we-hydraulic ngokuqhelekileyo ufana nowomphunga we-hydraulic lonke. Okwangoku, umphunga osebenzayo wendlela ye-hydraulic uninzi lwee-oli ze-hydraulic ezikwi-mineral (oli yemishini, oli ye-turbine, oli ye-hydraulic ejolise, njl.), oli ye-hydraulic yokuthintela umlilo (oli emanzini, amanzi emanzini, umphunga we-glycol, kunye neoli ye-phosphate, njl.) kunye neoli ye-hydraulic ekhethekileyo. Iimfuno ezijolise kumphunga osebenzayo ziboniswe kwi-schedule. Iimeko ezimele zicatshangelwe ekukhetheni umphunga osebenzayo we-hydraulic ziquka imozulu yokusebenza (ukuthintela umlilo, ubungozi, iphunga, njl.), iimeko zokusebenza (viscosity, umphakamo wesistim, ubushushu, isantya, njl.), umgangatho weoli (i-physicochemical index, ukuhambelana, ukungabi ne-rust, njl.) kunye nomnotho (ixabiso, ubomi benkonzo, njl.). Phakathi kwezi zinto, eyona ibaluleke kakhulu kukuvuthwa komphunga. Nangona zonke iintlobo zeziqhamo ze-hydraulic zichaze ioli ye-hydraulic efunekayo, umphunga we-hydraulic yinxalenye ebalulekileyo kakhulu kwi-system yonke (hhayi kuphela umphakamo, isantya kunye nobushushu buphezulu, kodwa umphunga uphumeza umphunga xa ucinga kwaye uphumeza umphunga). Ngoko ke, ukuvuthwa kunye nohlobo lweoli ye-hydraulic kungenziwa ngokweemfuno zomphunga. Ngeli xesha, umphunga wokuthintela ukonakala kufuneka ucatshangelwe kakhulu. Iimfuno zokuthintela ukonakala komphunga we-hydraulic zingu-vane pump > plunger pump > gear pump, ngoko ke i-HM oil kufuneka ikhethwe kwi-system ye-hydraulic enevane pump njengomphunga ophambili, kungakhathaliseki umphakamo; i-HM oil kufuneka ikhethwe kwi-system ye-hydraulic enepump ye-plunger njengomphunga ophambili, kwaye i-HL oil ingakhethwa kumphakamo ophantsi. Ngokweemfuno zomphunga, ukunceda ukuvuthwa kunye nohlobo lweoli ye-hydraulic, ungajolisa kwi-tafula elandelayo. Ioli ekhethiweyo ngokwepump ngokubanzi iyasebenza kwiimotor ze-hydraulic nezinye iindawo ze-hydraulic (ukukhupha i-valve ye-proportional kunye ne-valve ye-servo).

Izimfuno ezijwayelekile zokusebenza kwemidiya

序列号	projekti	序列号	projekti
moholo	Suitable viscosity: little affected by temperature change, general kinematic viscosity v = (11.5 ~ 41.3) × 10-6m2 / s	tshebe	Izinto ezinhle zokulwa ne-foam kanye nezakhiwo zokulwa ne-emulsifying, ukuhambisana okuhle nezinsimbi nezivalo.
mbili	Good lubricity: the oil film produced by oil lubrication has high strength to avoid dry friction	six	Iziphumo zikhombisa ukuthi i-volume expansion coefficient iphansi, i-specific heat capacity kanye ne-heat transfer coefficient ziphakathi, iphuzu lokugeleza kanye nephuzu lokuqandiswa ziphansi, kanti iphuzu lokukhanya kanye nephuzu lokuvutha ziphakathi.
three	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	Ita kea na e sa le fa'aleagaina i le tino o le tagata.

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 ya shinikizo kubwa): 32, 46, 68, 100, 150
Radial Piston Pump		30~50	65~240	HL mafuta (HM ye high pressure): 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 ethuliwe esithombeni) (Vopt = 16 ~ 36 mm2 / s). I-viscosity encane Vmin = 10mm2 / S iyinani le-viscosity ngaphansi kokushisa kwe-90 ℃ uwoyela okwesikhashana, kanti i-viscosity enkulu Vmax = 1oomm2 / S iyinani le-viscosity ngaphansi kokushisa okubandayo okwesikhashana. Ukuze ukhethe kahle i-hydraulic fluid, kubalulekile ukwazi (ukubala) ubudlelwano phakathi kokushisa kokusebenza (ivuliwe) kanye nokushisa kwemvelo kwe-oyela esitsheni se-oyela sohlelo lwe-hydraulic. 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-viscosities ehambelana nebanga elingcono lokusebenza le-viscosity (Vopt) yi-HM46 kanye ne-hm68, khona-ke uwoyela we-hm68 uyakhethwa. Ngesikhathi usebenzisa umdwebo wokukhetha uwoyela, kufanele kuqashelwe ukuthi ukushisa kokukhishwa kwesikhumba akukhuphuki njalo kune-oyela yokushisa yesitsha se-oyela, okuthonywa ngengcindezi yokusebenza kanye nesivinini se-pump. Nokho, ukushisa okuphezulu kwengxenye enanyayo yesistimu akufanele kube phezulu kuka-90 ℃.

由于水力技术在节能、环境保护和阻燃方面的优势，纯水力技术近年来发展迅速。国外有一系列的液压泵和液压马达可供选择，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，我们应注意水介质引起的材料腐蚀和老化、泄漏和磨损、气蚀和冲击、振动和噪音等问题。

Ihlole yokwenzela uma kuqhathaniswa amanzi ahlanzekile ne-fluid ye-hydraulic

性能	Hydraulic fluid	pura wate
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	1.2×10^4	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
气味、毒性和储存特性	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 iyahambisana yini nezindlela zokusebenzisa zabantu futhi ukuthi ingashintshwa yini nemikhiqizo efanayo.

⑥ Ukukhululeka kokugcinwa kufanele kubhekwe ngokuphelele. I-hydraulic pump esetshenziswayo kufanele ibe lula ukuyigcina emsebenzini nasendaweni, kube lula ukuthola abapholisa futhi kube nokwanele kokuhlinzeka.

⑦ Supply and product history should consider whether the selected hydraulic pump can be obtained quickly, how long it will take to obtain spare parts, the performance of the pump in similar or similar applications, the performance of the product and the historical status of production, use and acceptance. As the designer, user and maintainer of hydraulic system, we should have a comprehensive understanding of the distribution of domestic and foreign manufacturers (companies) of hydraulic pump and their product varieties, performance, service, reputation and replacement of new and old products, so as to realize the correct and reasonable choice of hydraulic pump.

Shiya imininingwane yakho futhi
sizokuthinta.

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