Malūnų reduktorinė alyva

Žaliavos malūnų reduktorių alyvos                                                           

Rūšis

Klampumas prie 40ºC, mm2 /s

Tankis, prie 15ºC, kg/m3

Pliūpsnio temp. PMCC, ºC

Stingimo temp. ºC,

Panaudojimas, savybės

 

 

Molylub Gear Oil SP 46

Molylub Gear Oil SP 68

Molylub Gear Oil SP 100

Molylub Gear Oil SP 150

Molylub Gear Oil SP 220

Molylub Gear Oil SP 320

 

 

 

46

68

100

150

220

320

 

 

 

880

880

890

895

900

905

 

 

 

210

210

215

215

215

220

 

 

 

-30

-30

-27

-27

-27

-21

 

Aukštaslėgės reduktoinės EP alyvos.

Sunkiai apkrautų (EP) pavarų alyva. Cheminių reagentų, naftos frakcijų maišyklėms. Aukštos stabilumo charakteristikos plieniniuose dantračių sukibimuose, geros antifrikcinės savybės “plienas-fosforuota bronza” trinties porose. Panaudotina tepimo rūku sistemose.

CLP DIN 51517-3. AGMA 250.04, US Steel 224.

 

 

 

 

Molyduval

Tantalus A 1000

 

 

 

 

 

1000

 

 

 

 

 

860

 

 

 

 

 

280

 

 

 

 

 

-15

 

Sintetinės PAO alyvos.

Pilnai sintetinė, PAO ir SHC mišinio, puikių aukštatemperatūrinių, didelių slėgių, oksidacinio stabilumo, mažo trinties koeficiento savybių industrinių pavarų, guolių alyvos.

Gaminamos ir ypač aukštų 1000-3200 klampumų.

CLPHC DIN 51525, AGMA 9005-D94.

Keičia Nareta 1000

 

Molyduval

Tantalus EB 460

460 870 230 -32

Saugi aplinkai Biologiškai iri aukštaslėgė reduktorinė konvejerių pavarų dėžių alyva. Sintetinių Bio esterių pagrindu.

Su pranašumu keičia :

GEARMASTER ECO 460 

Sintetinio pagrindo sunkiomis sąlygomis dirbančių pavarų alyva

MOLYDUVAL Tantalus TS 220 yra aukšakokybė sintetinių polialfaolefinų (PAO), mineralinių bazinių skysčių ir naujausių cheminių priedų pagrindo reduktorinė alyva. Skirta toms pritaikymo sritims, kur paprastos mineralinės alyvos neišlaiko sudėtingų darbo režimų. Sudėtyje esantis minkštinamasis agentas mažina sugedimo nuo šokinių apkrovų pavojų. Tai ypač aktualu kalnakasybos pramonės ir krovos technikos pavaroms. Dėvėjimąsi stabdančios ir ekstremalių apkrovų pernešimo savybės daro šią alyvą ypač efektyvia mechaninio bei terminio streso veikiamiems reduktoriams. Sintetinių bazių ir efektyvių rūdžių, oksidacijos, korozijos bei putojimo inhibicinių priedų kombinacija prailgina alyvos tarnavimo laiką (lyginant su mineralinėmis), tuo pačiu minimizuodama anglingų nuosėdų griaunantį efektą.

Savybės

·   Ženklus dėvėjimosi stabdymas

·   Efektyvi apsauga nuo rūdžių ir korozijos

·   Geros aukštatemperatūrinės savybės

·   Ektremalių apkrovų pernešimo geba

·   Stabilus klampumas net prie ekstremalių darbo sąlygų

·   Užtikrintas oksidacinis stabilumas

Pritaikymas

·   Ektremaliai apkrautos pramoninės pavaros

·   Kaip antifrikcinė ir dantračių sutepimo alyva sudėtingoms darbo sąlygoms

·   Kaip grandininė alyva sunkiai apkrautoms transporto ir galios perdavimo grandinėms

Naudojimo patarimai

Tepant slydimo paviršius panardinimo – karteriniu tepimu ar teptuku, tepikliu, automatine tepimo sistema

TECHNINIS PARAMETRAS

Specifikacija

Vnt

Reikšmė

Bazinis skystis

 

 

PAO + mineral

Tankis prie 15ºC

ISO 3675

kg/m³

900

Klampumo klasė ISO

DIN 51519

ISO-VG

220

Klampumas prie 40ºC

DIN 51562

mm²/s

220

Stingio taškas

DIN EN 7

ºC

-38

FZG Testas A/8.3/90

DIN 51354

 

> 12

 

Conveyors are driven by reduction gearboxes

of many different types but very often worm gearboxes, in order to allow the electric motor to sit adjacent to the conveyor and not to protrude too excessively. In these instances a very simple oil of the correct viscosity, which would normally be a mineral oil of I.S.O. Viscosity Grade 220 or 320 can be used, and does not necessarily have to possess extreme pressure properties. Gearboxes and bearings are also found in the numerous crushers that are located in the Infeed section of the quarry but suffer the same issues as for the conveyors in terms of dust. Here, centralised greasing systems are commonly used as the bearings are located very close to each other ensuring that the pipe runs are not too long, and the grease reservoir can quite easily be housed inside. The gearboxes are usually very large, and have a large oil capacity with the gear teeth often experiencing high shock loading, so extreme pressure gear oil is most commonly used for this reason alone. Crusher gearboxes benefit greatly from regular oil analysis and condition monitoring as the small sample required (approximately 100ml) does not affect the overall oil level and the information gained from the subsequent oil analysis can save a great deal of money in respect of unplanned downtime, and the associated costs of lost production.

A cement mill

is the equipment used to grind the hard, nodular clinker from the cement kiln into the fine grey powder that is cement. Most cement is currently ground in ball mills and also vertical roller mills which are more effective than ball mills.

Roller mills

These have been used for many years for the less exacting raw-milling process, but recently roller mills, in combination with high-efficiency separators, have been used for cement grinding. The grinding action employs much greater stress on the material than in a ball mill, and is therefore more efficient. Energy consumption is typically half that of a ball mill. However, the narrowness of the particle size distribution of the cement is problematic, and the process has yet to receive wide acceptance.

High-pressure roll presses

These consist of a pair of rollers set 8–30 mm apart and counter-rotating with surface speed around 0.9 - 1.8 m.s−1. The bearings of the rollers are designed to deliver a pressure of 50 MPa or more. The bed of material drawn between the rollers emerges as a slab-like agglomeration of highly fractured particles. The energy efficiency of this process is comparatively high. Systems have been designed, including a de-agglomerator and separator, that will deliver material of cement fineness. However, particle size distribution is again a problem, and roll presses are now increasingly popular as a "pre-grind" process, with the cement finished in a single chamber ball mill. This gives good cement performance, and reduces energy consumption by 20-40% compared with a standard ball mill system.

Ball Mills

A ball mill is a horizontal cylinder partly filled with steel balls (or occasionally other shapes) that rotates on its axis, imparting a tumbling and cascading action to the balls. Material fed through the mill is crushed by impact and ground by attrition between the balls. The grinding media are usually made of high-chromium steel. The smaller grades are occasionally cylindrical ("pebs") rather than spherical. There exists a speed of rotation (the "critical speed") at which the contents of the mill would simply ride over the roof of the mill due to centrifugal action. The critical speed (rpm) is given by: nC = 42.29/√d, where d is the internal diameter in metres. Ball mills are normally operated at around 75% of critical speed, so a mill with diameter 5 metres will turn at around 14 rpm.

The mill is usually divided into at least two chambers,(Depends upon feed input size presently mill installed with Roller Press are mostly single chambered), allowing the use of different sizes of grinding media. Large balls are used at the inlet, to crush clinker nodules (which can be over 25 mm in diameter). Ball diameter here is in the range 60–80 mm. In a two-chamber mill, the media in the second chamber are typically in the range 15–40 mm, although media down to 5 mm are sometimes encountered. As a general rule, the size of media has to match the size of material being ground: large media can't produce the ultra-fine particles required in the finished cement, but small media can't break large clinker particles. Mills with as many as four chambers, allowing a tight segregation of media sizes, were once used, but this is now becoming rare.

A current of air is passed through the mill. This helps keep the mill cool, and sweeps out evaporated moisture which would otherwise cause hydration and disrupt material flow. The dusty exhaust air is cleaned, usually with bag filters.