Calculation of Geometrical Parameters of Geokhod Transmission With Hydraulic Cylinders

Transcription

1 IO Coferece Series: Materials Sciece ad Egieerig AER OEN ACCESS Calculatio of Geometrical arameters of Geokhod Trasmissio With ydraulic Cyliders To cite this article: M Yu Blaschuk et al 016 IO Cof. Ser.: Mater. Sci. Eg View the article olie for updates ad ehacemets. Related cotet - Calculatio of Free Iterior imesios i Geokhod Trasmissio With ydraulic Cyliders M Yu Blaschuk, A A roov ad S S Gaovichev - evelopmet of Requiremets for a Basic Stadardized Mathematical Model of Geokhod V V Akseov, V Yu Beglyakov, A A Kazatsev et al. - The Mutual Effect of Reciprocally Movig Geokhod ad Geological Eviromet Studied by the iscrete Elemet Method i Software FC V.Yu. Timofeev, T.S. Kust, A.A. roov et al. This cotet was dowloaded from I address o 0/10/018 at 01:56

2 VII Iteratioal Scietific ractical Coferece "Iovative Techologies i Egieerig" IO ublishig IO Cof. Series: Materials Sciece ad Egieerig 14 (016) 0118 doi: / x/14/1/0118 Calculatio of Geometrical arameters of Geokhod Trasmissio With ydraulic Cyliders M Yu Blaschuk, A A roov, S S Gaovichev Yurga Istitute of Techology, TU Affiliate, 6, eigradskaya Str., 65050, Yurga, Russia mby.tpu@gmail.com Abstract. eveloped aalytical expressios for determiig parameters of trasmissio hydraulic cyliders' arragemet are cosidered, as well as the coditios for iteral arragemet of a required umber of hydraulic cyliders. Itroductio Curretly, creatio of geokhods prototypes has bee actively coducted. The geokhod is a ew kid of miig headig machies embodyig iovative techical solutios ad workig modes [1,]. A trasmissio (power drive) with hydraulic drive o the basis of hydraulic cyliders, placed chordwise iside the sectios, is the most promisig desig for the geokhods'. I order to esure the requiremets for a ew geeratio of geokhods' power drives [3], desig solutios should be made o the basis of layout diagrams, represetig hydraulic cyliders' operatio i differet phases [4,5]. a) b) Figure 1. Schemes of hydraulic cyliders characterizatio Cotet from this work may be used uder the terms of the Creative Commos Attributio 3.0 licece. Ay further distributio of this work must maitai attributio to the author(s) ad the title of the work, joural citatio ad OI. ublished uder licece by IO ublishig td 1

3 VII Iteratioal Scietific ractical Coferece "Iovative Techologies i Egieerig" IO ublishig IO Cof. Series: Materials Sciece ad Egieerig 14 (016) 0118 doi: / x/14/1/0118 Results ad iscussio The hydraulic cyliders are arraged i the space betwee two cylidrical shells (Figure 1). ydraulic cylider' body supports are fixed o the outer surface of the tail sectio shell, ad rod supportig members periodically egage ito mesh with the ratchet rack o the ier surface of the head sectio. While rod cyliders are advacig, slidig members egage the ratchet rack ad drive it ito revolvig. Body ad rod s spatial positio chages while advace ad retur motios of the hydraulic cylider rod; at that, head ad tail shell should ot impede chages i spatial positios of hydraulic cyliders' elemets. ower drive layout schemes have show that the most ratioal parameters of hydraulic cyliders arraged betwee the shells are obtaied with the followig proportios. S (3...4), (1). RO S (...3). () Whe arragig hydraulic cylider supports at oe circumferece (Figure 1b), that is whe. RO. it ca be take: S (3...4), (3) Most commercially available cyliders [6,7] has the followig ratio of a pisto stroke legth x to a size alog axes of moutig brackets 0 Х ( ) 0, (4) The maximum distace betwee the hydraulic cylider supports ca be represeted as the sum of 0 Х, (5) Stroke legth value Х ca be obtaied from the formulas (4) ad (5) Х, (6) 1 1 ( ) Approximate value of the maximum possible distace betwee the hydraulic cylider supports ca be obtaied from the scheme, takig ito accout the total umber of cyliders [8] (Figure 1b). To simplify the calculatio, we assume that the hydraulic cylider support will be arraged o oe circumferece [9], that is. RO.. The agle betwee bodies (rods) supports of adjacet cyliders will be determied by the umber of cyliders 360, degrees (7) Cylider with maximally advaced rod will cut the chord of legth o the circumferece based upo the cetral agle. Betwee these geometric parameters there is a relatioship, described by the expressio: si, (8) The cetral agle will be take for reasos of leavig a required agular gap ЗАЗ betwee rod supports ad bodies of adjacet cyliders. The agle will be based o a chord o the circumferece. For this scheme (Figure 1b) a gap magitude ca be set equal to the diameter of the pisto, that is =, while, similar to the expressio (8), it ca be writte: si, (9) et us express from (9)

4 VII Iteratioal Scietific ractical Coferece "Iovative Techologies i Egieerig" IO ublishig IO Cof. Series: Materials Sciece ad Egieerig 14 (016) 0118 doi: / x/14/1/0118 si, from which arcsi arcsi(si ) ; arcsi, degrees (10) The cetral agle will be equal to, degrees (11) Substitutig i (11) the expressios (7) ad (10) we fid 360 arcsi, degrees (1) Now, substitutig the expressio (1) i (8) we fid the expressio for si 0,5 arcsi si arcsi, (13) I view of the expressio (3), the expressio (13) takes the form 180 (3...4) si arcsi, (14) (3...4) Aother distace limitatio ca be logitudial stability of compressible rod. Maximum distace betwee the supports ca be determied by the formula d RO max, (15) k p [ ] where d RO is cylider rod diameter, m; k fixig coefficiet for hige mouts o both eds of the cylider k =1; [ ] safety margi (usually [ ] = 3.5 4); p workig pressure i the hydraulic cylider, a. The rod diameter is usually take to be based o the ratio [10] d RO ( ), (16) For a compressive load it is recommeded to take larger values of the expressio (15). While the hydraulic cyliders operate i differet stroke phases, it is ecessary to esure the reverse of the pisto of oe cylider or group of cyliders while advacig of other pistos at a distace of amout of differece betwee adjacet phases' strokes. This occurs whe the reverse speed is above the stroke rate. Х by, that is. Х, (17) Based o this coditio, rod diameter d RO at a costat workig fluid's flow rate Q i will be determied by the formula 1 d RO 1, (18) Substitutig (18) ito (15) we obtai max, (19) k p [ ] k p [ ] 3

5 VII Iteratioal Scietific ractical Coferece "Iovative Techologies i Egieerig" IO ublishig IO Cof. Series: Materials Sciece ad Egieerig 14 (016) 0118 doi: / x/14/1/0118 Whe the umber of reversig cyliders is will be = 1, umber of itermediate positios (phases), (0) The the expressio (19) takes the form: max, (1) k p [ ] Figure shows diagrams the maximum possible (safe) distaces betwee hydraulic cylider supports agaist the umber of cyliders ad the pisto diameter, plotted for a sectio with diameter = 3.7 m by desig arragemet coditio (Fig. ) ad stability coditio (Fig. 3). Figure. epedece of the safe distace by stability coditio Figure 3. epedece of the safe distace by desig coditio Figure 4 shows a diagram plotted o both coditios for various umbers of cyliders. 4

6 VII Iteratioal Scietific ractical Coferece "Iovative Techologies i Egieerig" IO ublishig IO Cof. Series: Materials Sciece ad Egieerig 14 (016) 0118 doi: / x/14/1/0118 Figure 4. epedece of safe distace by desig arragemet coditio ad stability coditio Coclusio iagrams of depedeces of the safe iscribable distace betwee the hydraulic cylider supports by stability coditio show that for small pisto diameter safe distaces betwee the hydraulic cylider supports by stability coditio are sigificatly less tha the maximum safe distace by desig arragemet coditio; thus, as a umber of cyliders icreases, the stability coditio is predomiat. I additio to the legth limitatios by desig coditios ad stability coditio, the required iside structure gage may also limit geokhod size. For the purpose of icreasig its size, it is ecessary to dimiish the distace betwee supports ad, correspodigly, the stroke legth. Refereces [1] Efremekov A.B., Akseov V.V., Blashchuk M.Y. Force parameters of geokhod trasmissio with hydraulic drive i various movemet phases // 7th Iteratioal Forum o Strategic Techology (IFOST - 01): roceedigs: i vol. IEEE, 01. Vol [] Efremekov A.B. Formig the subterraea space by meas of a ew tool (geokhod) // 6th Iteratioal Forum o Strategic Techology (IFOST - 011): roceedigs: i vol. IEEE, 011. Vol [3] Efremekov A.B., Timofeev V.Y. etermiatio of ecessary forces for geokhod movemet. IEEE, [4] Akseov V.V., Blaschuk M.Y., ubrovskii M.V. Estimatio of Torque Variatio of Geokhod Trasmissio with ydraulic rive // Applied Mechaics ad Materials Vol [5] Blashchuk M.Y., Kazatsev A.A., Cherukhi R.V. Capacity Calculatio of ydraulic Motors i Geokhod Systems for Justificatio of Eergy-ower Block arameters // Applied Mechaics ad Materials Vol [6] Buyalich G.., Buyalich K.G., Voyevodi V.V. Radial deformatios of workig cylider of hydraulic egs depedig o their extesio // IO Coferece Series: Materials Sciece 5

7 VII Iteratioal Scietific ractical Coferece "Iovative Techologies i Egieerig" IO ublishig IO Cof. Series: Materials Sciece ad Egieerig 14 (016) 0118 doi: / x/14/1/0118 ad Egieerig Vol [7] Buyalich G.., Auchi A.V., roov A.A. Numerical Aalysis of Accuracy of ydraulic eg Cylider i Modelig Usig Solid Works Simulatio // Applied Mechaics ad Materials Vol [8] Cherukhi R.V., roov A.A., Blashchuk M.Y. Applicatio of aalytic hierarchy process whe choosig layout schemes for geokhod pumpig statio // IO Coferece Series: Materials Sciece ad Egieerig Vol [9] Sadovets V.Y., Beglyakov V.Y., Akseov V.V. evelopmet of math model of geokhod bladed workig body's iteractio with geo-eviromet // IO Coferece Series: Materials Sciece ad Egieerig Vol [10] Buyalich G.., Buyalich K.G. Modelig of hydraulic power cylider seal assembly operatio // Taisha Academic Forum - roject o Mie isaster revetio ad Cotrol