Wire-race bearings application

Stratosphere observatory for infrared astronomy.
An aluminum three-row wire-race roller bearing with a bolted steel gear ring for the rough adjustment of the telescope was applied. The telescope is in the rear of a converted Boeing 747.During the flight, a sort of “sliding roof” opens to enable the telescope to make astronomic observations in the infrared range.
Optical telescopes
Three-row wire-race roller bearing was designed for telescopes. The bearing rings are made of aluminium.The bearings enable the adjustment of the M2 mirror.In addition,a surface-hardened three-row precision bearing was supplied to adjust the M3 mirror.Astronomic faculties use these telescopes for their extensive research.
Articulated buses
Hybrid-type four-point bearing was manufactured for the articulation of buses, consisting of a wire race bearing part and a surface-hardened part.The majority of the articulated buses are referred to as pushers, i.e. the engine and entire drive unit are located in the rear section, in the trailer.This concept puts a lot of specific requirements on the articulation, such as buckling stability, for instance, which is achieved by means of a complicated electronically-controlled damping system.

UWE Wire-race Bearing Components

Wire races:Hardened or naturally hardened steels
Rolling elements:Bearing steel, also corrosion-resistant
Bearing rings:aluminium
Surface: corrosion-proof
• Steel normalized or hardened and tempered
Surface: corrosion-proof
• Stainless steel, selection as required(e.g. acid-resistant steels)
• Special steels, selection as required(e.g. magnetoresistive steels)
• Bronze(e.g. seawater-resistant bronze)
Rolling elements
• Bearing steel, also corrosion-resistant
Gear rings
• The material can be selected as for the bearing rings.
• The gearing cut into the ring can be hardened.
Material combinations
• Material combinations in one bearing are also possible (e.g. rings of aluminium and gear ring of hardened and tempered steel).
Design and dimensioning

Wire-race bearing special designs

There are few special types for UWE wire-race bearing
Four-row wire-race roller bearing
Particularly designed to transmit loads due to the different expansion behaviour of the outer and inner companion structure or to prevent radial clearance in this context.
Hybrid-type three-row wire-race roller bearing
The raceways of the outer ring are surface hardened, the raceways of the inner rings have a wire filling. Particularly designed to compensate raceway tilts due to the expansion of the inner companion structure.
Hybrid-type four-point wire-race ball bearing
The raceways of the inner ring are surface hardened, the raceways of the outer ring have a wire filling. Particularly designed to enable the necessary cast design to act at the same time as outer ring.
Four-point wire-race ball bearing
With integrated 4-way slip ring and retaining ring with spring suspension system. Particularly designed for the transmission of electric current and limitation of the frictional torque in case of a major deformation of the companion structure. Furthermore equipped with earthing plugs to compensate the potential between the bearing rings.
Three-wire race bearing
With integrated ring motor. Particularly designed to integrate the drive into the bearing.
Segmented wire-race ball bearing
Particularly designed for limited available space.

aluminium alloy wire-race bearing

Wire raceway slewing bearing, it is a kind of the rolling ring of composite inlay and supporting the production of special structure bearing.Bearing main body material can be some special material: according to the operating conditions such as special aluminum alloy material, special copper and other metals or metal materials. quenching spring wire embedded in the bearing ring to serve as a bearing raceway, has the characteristics of high precision, wear resistance, easy maintenance.
Double row cylindrical roller wire-raceway slewing bearing was deliveried in March 2014, recognised by the height of the foreign users.UWE research and development of steel wire raceway slewing bearing to ensure the bearing strong corrosion resistance, light weight, and is applicable to cold, heat, and many other very dirty environment and to ensure the bearing under the characteristics of high precision operation, carrying capacity, impact resistance, high reliability.
Due to the high contact stress is mainly borne by steel wire, bearing ring (the research and development for monolithic) was ingredients.After damage and bearing steel wire rolling, can be removed to replace, the characteristics of two kinds of greatly reduces the cost of transportation, transportation efficiency, repair costs and downtime work time.
This kind of bearing difficult to design and manufacture, UWE technology belongs to the domestic advanced level, are widely used in light machinery, medical equipment, military field and other special work areas, etc.

UWE wire-race bearing

UWE wire-race bearings fulfill the described requirements. Due to the fact that the rolling elements do not roll on the bearing rings but on the wires which are in the bearing rings, the material selection and material combination of the components are nearly unlimited.
We are ready to develop a tailor-made solution for new applications at any time.In addition, wire-race bearings offer the possibility of a more economical repair since it is often sufficient to replace individual components such as wire races, rolling elements, spacers and seals in order to reuse a repaired bearing.

Aluminum Alloy Bearing Characteristics

Apart from the weight savings already mentioned UWE light alloy wire-race bearings are particularly advantageous in applications where the bearing is required to withstand shock loads and travelling vibrations. Due to aluminium’s smaller modulus of elasticity in comparison with steel and the additional elastic deformation between the races and race beds in the bearing rings, shock loads are absorbed much more smoothly, so that brinelling in the races and striation can be prevented.The high elasticity of the wrought aluminium alloy characterized by a low modulus of elasticity causes the elongation differential to be fully absorbed by the wire-race bearing.

Aluminium wire race bearing

Wire race bearing is a special structure bearing with the ring and raceway composited inlay. Bearing main body material can be choosen with some special material according to the operating conditions such as special aluminum alloy material, special copper and other metals or metal materials. Using quenched high performance special spring wire embedded in the bearing ring to serve as a bearing raceway with the characteristics of high precision, wear resistance, easy maintenance.
UWE designed and developed double row cylindrical roller wire raceway slewing bearing ,which was deliveried in March 2014, recognised by the height of the foreign users. The research and development of steel wire raceway slewing bearing ensure the bearing strong corrosion resistance, light weight, and it is applicable to cold, heat, and many other very dirty environment. Meanwhile the wire race bearing has characteristics of high precision operation, carrying capacity, impact resistance, high reliability.
Due to the high contact stress is mainly borne by steel wire, rings can be seperated. Bearing steel wire rolling can be removed to replace if damaged, the characteristics greatly reduces the cost of transportation, transportation efficiency, repair costs and downtime working time (rapid change in order to avoid delay in wartime aircraft).
This kind of bearing manufacturing is difficult, UWE technology belongs to the domestic advanced level, UWE aluminum wire race bearings are widely used in light machinery, medical equipment, military field and other special work areas, etc.

Wire-race bearings characteristics

Typical features of UWE wire-race bearings are the high-strength races for the rolling elements. A wire-race bearing system allows structural and material combinations as well as cross sections which are out of reach of any conventional antifriction bearing.Dimensions, cross sections and the ring material of the bearings can be optimally matched to all application requirements. Depending on their purpose, UWE wire-race bearings can be ball bearingsroller bearings.They offer decisive advantages over conventional surface-hardened slewing bearing designs like high running accuracy, low and uniform torque resistance even when distorted, resistance to corrosion, low weight due to the surrounding aluminum alloy bearing rings and low maintenance.

Aluminum Alloy Bearing

The surrounding bearing rings are not directly exposed to rolling friction, they do not have to be made from steel but can consist of non-ferrous metals, cast iron or synthetic materials. In particular, UWE aluminium alloy wire-race bearings with light alloy bearing rings have gained special importance.The same load carrying capacity as that of comparable steel bearings is achieved by using an aluminium alloy of high mechanical strength as ring material.Compared to steel bearings of identical cross sections,aluminium wire-race bearings weigh approx. 60 % less.High mechanical strength of this wrought aluminium alloy means that the gearing can also be cut directly into one or more bearing rings.A light alloy wire-race bearing can be made corrosion-proof and maintenance-free by using appropriate materials for the rolling elements and races. The corrosion behaviour of aluminium bearing rings can be significantly improved by a surface treatment.Weight comparison between light alloy and steel bearings equal in size with the same load-carrying capacity and an external diameter of 2200 mm.

Aluminum wire race bearing

Wire race bearing is a special structure bearing with the ring and raceway composited inlay. Bearing main body material can be choosen with some special material according to the operating conditions such as special aluminum alloy material, special copper and other metals or metal materials. Using quenched high performance special spring wire embedded in the bearing ring to serve as a bearing raceway with the characteristics of high precision, wear resistance, easy maintenance.
UWE designed and developed double row cylindrical roller wire raceway slewing bearing ,which was deliveried in March 2014, recognised by the height of the foreign users. The research and development of steel wire raceway slewing bearing ensure the bearing strong corrosion resistance, light weight, and it is applicable to cold, heat, and many other very dirty environment. Meanwhile the wire race bearing has characteristics of high precision operation, carrying capacity, impact resistance, high reliability.
Due to the high contact stress is mainly borne by steel wire, rings can be seperated. Bearing steel wire rolling can be removed to replace if damaged, the characteristics greatly reduces the cost of transportation, transportation efficiency, repair costs and downtime working time (rapid change in order to avoid delay in wartime aircraft).
This kind of bearing manufacturing is difficult, UWE technology belongs to the domestic advanced level, UWE aluminum wire race bearings are widely used in light machinery, medical equipment, military field and other special work areas, etc.

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