CN2218276Y - Composite steel short roller bearing - Google Patents

Abstract

The utility model relates to a composite steel short roller bearing which has the advantages of low manufacture cost and favorable impact resistance and can replace the existing super aligning sliding bearing on various large-sized devices such as a ball mill, etc., the electric force, lubricating oil and the cooling water are largely saved, and the stop loss and the maintenance cost are obviously reduced. The utility model is characterized in that a layer of alloy ring with high strength, abrasion resistance and fatigue resistance is adhered on the inner side on an inner sphere and an outer sphere basal bodies which are made of normal rolled steel through auxiliary weld technology, and the ring directly contacts with a roller; in addition, a holder is formed by hinging multiple chain plates and a chain shaft, a hole is in the center of the roller, the roller is sheathed on each chain shaft to form the chain type floating holder.

Description

The Composite Steel cylindrical roller bearing

The utility model relates to a kind of rolling bearing, particularly is applicable to the huge aligning cylindrical roller bearing on the main equipments such as all kinds of pebble mill.

At present, the rolling bearing of producing is made with Bearing Steel mostly both at home and abroad, this steel are the price height not only, and forge, heat treatment and cold machining process difficulty are bigger, the reject rate height, so product cost is high always, had a strong impact on Development in Machine Industry, especially larger-size huge bearing, this problem is more outstanding, for example, mine both domestic and external, metallurgical, chemical industry, the huge bearing that is adopted on the main equipments such as pebble mill of producing in building materials and the power industry and using still is two cool tone heart sliding bearings so far, and fails to adopt rolling bearing, it is said that main cause is that the rolling bearing impact resistance is relatively poor, this machine operating mode of incompatibility, huge besides rolling bearing price is too high.It is reported above-mentioned sliding bearing; though manufacture cost is lower; but mechanism's more complicated; user cost is but very high; for example; the radial load that hollow main shaft acts on the sliding bearing is very heavy; substantially belong to local load again; so surface friction drag in service is very big; cause a large amount of idle energy loss (accounting for 25% of total energy consumption greatly according to test, unit year reactive loss electric power 60-86 ten thousand degree) and consume a large amount of lubricant oil (unit year consumption 10-14 ton), and the heat that idle energy consumption transformed to be taken away (ten thousand tons of unit year consumption cooling water 2-3) by a large amount of permanent current cooling waters; the life-span of bearing low (about 1 year); poor reliability often causes the tile kilning hot box accident, even cause huge hollow main shaft and damage of bearings to scrap; not only maintenance expenses is very high, also will cause shutdown loss.

The purpose of this utility model provides a kind of cylindrical roller bearing; fully guaranteeing and optimizing on the basis of existing rolling bearing performance; reduce manufacture cost significantly and improve its impact resistance; with the huge sliding bearing on this instead of ball mill; can reduce the huge energy; cooling water and lubricant oil waste prolong bearing life, reduce shutdown loss and maintenance expenses.

The embodiment that realizes above-mentioned purpose is as follows: design a kind of cylindrical roller bearing, particularly be applicable to the huge aligning cylindrical roller bearing on the main equipments such as all kinds of pebble mill, this bearing is made of inner ring, outer ring, roller and retainer, the alloy hoop that improve main points and be within it, the inboard of outer ring adheres to one deck high strength, wear-resisting and antifatigue respectively with the auxilliary soldering method of low stress, this ring directly contacts with roller.

In this scheme, the matrix of inside and outside circle can be used the direct cast form of common low carbon structural steel, not only price is low, and casting and forging, and technology is simple, cold working also is easier to, without bulk heat treatment, thus easy to manufacture, and cost is low, and have high toughness, promptly improved the impact resistance of whole bearing.And can use high alloy steel (for example GCr15SiMn, GCr9 and the GCr15 etc.) manufacturing of high strength, wear-resisting and antifatigue with the alloy hoop of using as raceway that the auxilliary welding technology secure adhesion of low stress gets on, though consumption is few, but after surface Hardening Treatment (handling) and surface heat processing, get final product grinding forming as the spreading cold-working, can reach not only that bearing is wear-resisting, antifatigue and high contact stiffness requirement, also can save a large amount of superior alloy steels, obviously reduced manufacture cost, thereby put down road for the huge sliding bearing on the instead of ball mill is auxilliary.Observe through using; this bearing usable oils grease lubrication; save a large amount of lubricant oil; can normally move fully; and frictional resistance is starkly lower than former sliding bearing; power consumption significantly descend (calculate and to save electric power 40-70 ten thousand degree unit year); cooling water has not needed yet; equipment can be simplified, and service life can improve tens times, and machine halt trouble is few; only be equivalent to 0.002% of sliding bearing; certainly maintenance expenses has also just reduced (it is estimated that unit every year can save at least ten thousand yuan of 5-10) significantly, and present technique is if promote (comprising new design and existing equipment transformation) in the whole nation, and huge economic benefit and social benefit will be surprising.

Certainly, because the operating mode of pebble mill is extremely unstable, the utility model also will further improve on the impact resistance to do a little articles more, for example increase the quantity and the columns of roller, and the structure etc. of improving retainer, wherein relatively effective method is that its retainer is formed by more piece carrier bar and chain rivet hinge joint, constitute the unsteady retainer of chain type, be arranged in the two distolateral of roller, the roller center is porose, and is sleeved on each chain rivet with this.Because roller hollow, elasticity strengthens, and adds the gap that is connected with between carrier bar, chain rivet and the roller again, form the chain type flexiblesystem, contrast traditional integral rigidity retainer, shock resistance is obviously optimized, and wear resistance also increases, make simple, become dressing easy, stock utilization also has raising, but indivedual carrier bars, chain rivet and roller damage the follow-up reforwarding row of local replacing in the use, so whole bearing improves working life, manufacture cost and user cost can further reduce again.

Such scheme is feasible and effective in bearing and equipment design, but how to apply in the technical innovation of large quantities of existing equipments, but is more vital.The inventor thinks, except on specification and pattern, accomplishing the variation, its aligning mechanism is consistent with existing pebble mill, even also the outer surface of its outer ring is made spheric structure, the utility model can directly be contained on the existing equipment use, can not only save a large amount of improvement expenseses, obtain considerable economic benefit in a short time, also can improve the stress condition (for present existing outer ring inner ball surface selfaligning roller bearing) of roller in this roller bearing, improve bearing capacity and working life.

Below in conjunction with the embodiment who provides the utility model is replenished description.

Fig. 1 is a present embodiment half section External view;

Fig. 2 is that its chain type retainer launches schematic representation.

Can see that by Fig. 1 this bearing is by inner ring 1, outer ring 7, two row short cylindricals 4 and retainer 6 constitute, wherein on the outer ring raceway rib is arranged, and there is not rib on the inner ring, in order to install and remove conveniently, for ease of maintenaince reach and to bear a small amount of thrust load, can be at inner ring biend dress with separable back-up ring 3, in the novel part of this bearing is, the inboard of outer ring and back-up ring (working surface) has adhered to one deck high alloy ring 2 and 8, owing to adopted low stress to assist welding technology, alloying element in this ring is to matrix 1,3 and 7 have carried out strong osmotic, form and connect transition layer reliably, make the adhesion of ring extremely strong, basically be one with the matrix hot melt, be called as Composite Steel, wherein matrix 1,3 and 7 account for 90-95%.Its outer ring outer surface is made spheric structure and is designed for adapting to the current techniques transformation.

Can be seen that by Fig. 1 and Fig. 2 this routine retainer is to be formed by more piece carrier bar 6 and chain rivet 5 hinge joints, each roller center is porose, and is sleeved on the chain rivet, forms the unsteady retainer of complete chain type.

Claims (3)

1, a kind of cylindrical roller bearing, particularly be applicable to the huge aligning cylindrical roller bearing on the main equipments such as all kinds of pebble mill, this bearing is made of inner ring (1), outer ring (7), roller (4) and retainer (6), it is characterized in that, the inboard of said inside and outside circle adheres to alloy hoop (2) and (8) of one deck high strength, wear-resisting and antifatigue respectively with the method for the auxilliary weldering of low stress, this ring directly contacts with roller.

2, bearing according to claim 1 is characterized in that, said retainer (6) is formed by the hinge joint of more piece carrier bar (6) and chain rivet (5), is arranged in the two distolateral of roller (4), and the roller center is porose, and is sleeved on each chain rivet with this.

According to claim 1 and 2 described bearings, it is characterized in that 3, the outer surface of said outer ring (7) is sphere.

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