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1、外文AFEEDUNITFORDRILLINGMACHINESN.N.Esinand~.G.ChernilovUDC622.233.056Thefeedunitsofdrillingmachinesfeedthedrillmechanism,drillrod,andbittowardsthefaceduringdrilling,andalsoraiseandlowerthedrillrod.鉆孔機(jī)的進(jìn)料單元飼料朝向臉鉆頭機(jī)制，鉆桿，和位在鉆井過程中，也提高和降低的鉆桿。Mechanicalfeedunitswit
2、hdrivefromapneumaticmotor[1]aresmallandcandeveloplargefeedthrusts.However,theyhavecertaindrawbacks:thefeedvelocityislow,whichincreasesthetimerequiredforauxiliaryoperations;theapparatusiscomplicatedandinsufficientlyreliableinuse;andthepheumaticmotorisnoisy.Pn
3、eumaticpistonfeedunits[2]aresimpleindesignandreliableinuse,andgiveelasticityofthefeed,reducingwearonthebitandpermittinganincreaseintheproductivityofdrilling.However,theyarelarge,becausethethrustdevelopeddependsontheareaofthepL~tonwhichisactedonbycompressedai
4、ratacomparativelylowpressureof5-6kg/cm2.Nevertheless,thefullratedfeedthrustisquiterarelyused(forexample,inthelastfewmetersofadeepborehole).從氣動(dòng)電機(jī)的驅(qū)動(dòng)機(jī)械的進(jìn)料單元[1]是小型和發(fā)展大型飼料thrusts.However，它們有一定的缺點(diǎn)：進(jìn)料速度是低的，這增加了用于輔助操作所需的時(shí)間的裝置是復(fù)雜的，不夠可靠在使用和的pheumatic馬達(dá)是喧鬧的。氣動(dòng)活塞進(jìn)料單元[2
5、]的設(shè)計(jì)是簡單的和可靠的使用中，并且給進(jìn)料的彈性，對位減少磨損，并允許在鉆井的生產(chǎn)率增加。但是，它們是大的，因?yàn)殚_發(fā)的推力取決于是在比較低的壓力為5-6公斤/厘米2的壓縮空氣作用在其上的區(qū)域上的皮升（pL）?噸。然而，全額定進(jìn)給推力相當(dāng)罕見（例如，在過去數(shù)米的深鉆孔）。Withtheaimofimprovingtheoperationalqualitiesofdrillingmachines,wehavedevelopedanewtypeofpneumaticpistonfeedunit.Itsessentia
6、lfeatureisthattheairpressureinthefeedcylindercanbeseveraltimesgreaterthanthatintheairmains.Thisisachievedbymeansofapressureconverterconsistingofseveralpistonsandcylindersinseries.隨著鉆孔機(jī)的執(zhí)行性能的改善的目的，我們已經(jīng)開發(fā)了一種新類型的氣動(dòng)活塞進(jìn)給單元。其基本特點(diǎn)是，在進(jìn)給氣缸的空氣壓力比空氣中的電源可以是大幾倍。這是通過由幾個(gè)串聯(lián)
7、的活塞和氣缸的壓力轉(zhuǎn)換器的裝置。Figure1showsaschematicdiagramofthefeedunit.Theworkingpartscomprisefeedcylinder1withpiston9androd3.Thepressureconverterconsistsofcylinder4withfreelymovingpiston5andseveralsinglecylinders6withtappets7.Therodofeachtappetpassesthroughaglandinthee
8、ndwallandfreelybearsontheheadoftheprecedingtappet.Airisdistributedbypistonvalve8.Theelementsofthesystemareconnectedbyairducts,oneofwhichcontainsbackvalve9,andanothercut-offvalve10.Thefeedunitisc
