Without oil-lubricated bearing casts the application of machine in aluminous ingot

Self-lubricating bearing use temperature is wide, solid is lubricant material content is enough, release even, have good self-lubricating function and occlusive sex, protect journal effectively, achieve abiding use goal. Apply to the environment that in high temperature, low speed, burden, dirt big, water develops to drench and have concussion vibration next moving, can apply extensively at place of the scroll of the mechanical equipment such as mine machinery, metallurgy, oil, chemical industry, food, spin, papermaking, printing and dyeing and sliding bearing. Aluminous electrobath produces manufacturing aluminous juice, carry with vacuum in falling to mix furnace after the bag is epispastic, after the course deserves to compare and divide broken bits, flow into aluminous ingot to cast the mould in machine to shape, shaping solid calls aluminous ingot, aluminous ingot of production piles a code by stacker. Manufacture efficiency to rise, before aluminous ingot shapes, must undertake cooling with many cooling water, the heat energy with aluminous in cooling process tremendous fluid releases cooling water in, produce glowing vapour. Cast machine bearing to be in high temperature and water vapour environment in, bearing is grease lubricates more very, additive grease can fuse because of high temperature inside shorter time overflow eliminate, maintain safeguard difficulty, equipment surface sanitation is difficult also mop of easy put on the skin. Again steel structure bearing is corroded very easily in glowing, damp environment rusty, fault rate is very high, equipment upkeep costs is higher, equipment moving middling gets the following the worry of two difficult problem. The operation that offer oil realizes high temperature to move continuously hard cast of machine pull ingot, move ingot, receive ingot-shaped tablet, turn over the device such as ingot to all be installed inside aircrew housing, the design on every rotational bearing has fixed infuse lubricating oil the oily establishment of fat, the beard when oiling jockeys demolish housing, press person grease with oil gun. And overall oiling dot reachs 30 much point, move for a long time safeguard cannot realize this kind of trival oiling operation, be forced to hold rare sauce boat to drench irrigate the bearing in move to cover exterior, the attrition that lube enters bearing very hard deputy, major bearing is in attrition condition. Environmental temperature is high, grease is lubricant incommensurate the grease of 2 vulcanization molybdenum that casts place of machine scroll bearing to use at present is thought grease of ability high temperature, we know its base oil is petroleum products, add additive of a few high temperature resistant 2 vulcanization molybdenum, its are able to bear or endure lukewarm limit namely 120 ℃ . Cast temperature of machine bearing job to be able to amount to 200 ℃ according to measuring, already was head and shoulders above grease to be able to bear or endure lukewarm limit. Below such high temperature conditions, the base oil in grease can become rare to mix be evaporated gradually, molybdenum of the carbolic residue that leave, 2 vulcanization, dirt mixes solid lump caky go up in the cage of scroll bearing, not only lose its lubricant action, those who return bearing of block up scroll is normal run and wear away very quickly, most 2 weeks have to stop machine, tear open next bearing to clean change new oil. One, wear away it is more serious that the bearing blame that state aluminous ingot casts equipment bearing to run medium two catastrophe problem to cause wears away normally. With some aluminium enterprise the orgnaization that pull ingot is exemple, bearing is average service life 2 months, wear away serious when wear the inner ring of 5mm unexpectedly wear, cause equipment to cannot continue to move. Wearing away is inhomogenous. The reason is to design oily means not to come true formerly, the bearing in moving fortunately only is exterior drench burn rare oil, a few can drench burn bearing inside, wear away lesser, also can see from inside the watch the axis of more than 50% is mixed set did not get lubricating, be in the adhesive wear with the stronger generation below dry attrition condition however. This kind wears away to increase very quickly the axis swims with what cover clearance, criterion dirt is entered more easily, create vicious circle. 2, without oil self-lubricating of bearing choose the lubricant problem that to solve the high temperature in mechanical equipment, low speed, burden, dirt big, water develops to drench and have concussion vibration, choose without oil self-lubricating bearing. 1.

The construction of bearing is self-lubricating bearing is the metal in bearing matrix the development on attrition face forms the hole with orderly proper size, built-in 2 vulcanization molybdenum, black lead make compound self-lubricating piece enchase cover in the metal on, the compound bearing that makes, solid lubricant grinds the area is amounted to 25 - 65% . Solid is self-lubricating a can regular below the high temperature of 280 ℃ job. But because its are mechanical intensity is low, carrying capacity is weak, easy generation is out of shape, enchase it inside metallic aperture chamfer to be able to restrain this kind of defect, formed a metal bear the weight of since the part action, self-lubricating piece have lubricant effect. This kind self-lubricating the lubricant mechanism of bearing is to be in axis and covered sliding friction process, self-lubricating the transfers an axis partly metal of material element apparently, fill and level up is tiny and rough face, formed a stabler solid lubricating film, create solid body be opposite between lubricating film grind, prevent axis and covered adhesive wear. The band of this kind of rationality is integrated copper alloy and metalloid reduce the respective and complementary advantage that wears stuff, special agree with to be spent without oily, high temperature, high load, low speed, the motion in environment of anti-fouling, corrosion protection, strong radiate, and use below the requirement of special operating mode that be in water or cannot impose lube fat at all. 2.

Self-lubricating piece occupy area ratio self-lubricating of an area that take a list how many with locomotive speed, bear intensity of pressure is spent about, traversal speed is low; Bear intensity of pressure is spent big, metallic place occupies an area to answer a few bigger. If catch ingot car to walk travel annulus bearing is self-lubricating piece what occupy an area to be 25% the left and right sides, bearing of runner shaft of the orgnaization that pull ingot is lubricant want sufficient, bear intensity of pressure is spent not quite, self-lubricating piece what occupy an area to be 65% the left and right sides. 3.

To the technology of lining material requirement lining should choose alloy copper to make, lining should have taller hardness, need heat treatment commonly, its hardness not under HRC45. 4.

Self-lubricating piece geometrical appearance and set a requirement. Self-lubricating piece appearance has column form and rectangle two kinds, self-lubricating can use column form according to what constituting area bulk, can use rectangle conversely. No matter why be planted,appearance must be enchased firm, fall off in move in case. 5.

Of lining and axis cooperate clearance the value is self-lubricating piece 10 times what linear expansion coefficient is steel about. Change to get used to bearing temperature, the clearance of axis and lining by original metal 4 class are moved cooperate (D4/dc4) 0.

032 ～ 0.

15mm, add for 0.

45 ～ 0.

5mm. Self-lubricating piece in attrition deputy a side highlights lining metal 0.

2 ～ 0.

4mm. What such meetings run in bearing is initiative adjust period get lubricating adequately, reduce motivation to pull those who use power to use up. 6.

Without oil self-lubricating the advantage of bearing: A.

Without oil-lubricated or little oil-lubricated, apply to the place that cannot be cheered or cheers very hard, can not maintain when use or little maintain. B.

Wear-resisting performance is good, coefficient of friction is small, service life is long. C.

Have play plasticity right amountly, can distributing stress to go up in wider interface, increase the carrying capacity of bearing. D.

Close of coefficient of static kinetic friction, can eliminate the crawl below low speed, assure mechanical working precision thereby. E.

Can make machinery reduces vibration, reduce noise, prevent to pollute, improve labor condition. F.

Move film can be formed in locomotive process, rise to protect the action to grinding an axis, without phenomenon gnawing an axis. G.

Low to grinding axial hardness to ask, the axis without recuperation can be used, reduced the treatment difficulty of relevant spare parts thereby. H.

Thin wall structure, quality is light, can reduce mechanical volume. I.

Lining material is brass character, can use in corroding medium. Adopt some aluminous industry practice, cast machine bearing instead not to have oil self-lubricating bearing, already used 15 months continuously, and still moving, the clearance of axis, lining does not exceed 1mm generally, predict to return but reuse 12 months, exceed former service life apparently (2 months) . Without oil self-lubricating bearing not only can cast in aluminous ingot better land gets applying on machine, can suit to be spent at having oily, high temperature, high load, low speed at the same time, the motion in environment of anti-fouling, corrosion protection, strong radiate, and the equipment below the requirement of special operating mode that be in water or cannot impose lube fat at all, this kind of bearing has wider promotion value. The bearing that at present each mechanical industry place use still is and so on of ball, needle roller for the most part, but fraction already was used self-lubricating bearing, believe to be in before long the dominant that will come from lubricant bearing to be able to become bearing. It is a part below self-lubricating the applied characteristic of bearing and advantage: 1.

Without oil-lubricated or little oil-lubricated, apply to the place that cannot be cheered or cheers very hard, can not maintain when use or little maintain. 2.

Wear-resisting performance is good, coefficient of friction is small, service life is long. 3.

Have play plasticity right amountly, can distributing stress to go up in wider interface, increase the carrying capacity of bearing. 4.

Close of coefficient of static kinetic friction, can eliminate the crawl below low speed, assure mechanical working precision thereby. 5.

Can make machinery reduces vibration, reduce noise, prevent to pollute, improve labor condition. 6.

Move film can be formed in locomotive process, rise to protect the action to grinding an axis, without phenomenon gnawing an axis. 7.

Low to grinding axial hardness to ask, pledge without tone the axis of processing can be used, reduced the treatment difficulty of relevant spare parts thereby. 8.

Thin wall structure, quality is light, can reduce mechanical volume. 9.

Steel the reverse side can eletroplate a variety of metals, can use in corroding medium; Apply extensively already at all sorts of mechanical slip place at present, for example: Machine of printing machine, spin, nicotian machinery, electrical micro-machine, car, autocycle and aricultural machinery are waited a moment. CNC Milling