Composite railway wheel and method of manufacturing

 

(57) Abstract:

The wheel includes a rim (1), the Central part (2) which consists of a hub (22) and drive (6), shock (5), located between the Central part (2) and the rim (1) at least one flange (3) and means (7) for fastening at least one flange (3). At its inner part (9) of the rim has two chamfers (10, II), located on either side of the plane of symmetry of the wheel and United in their most inner part of the cylindrical section (12), usually flat. The cross section of the absorber (5) is made in the form of a Tulip. The method is characterized in that first made from steel billet by means of forged monoblock wheel - Central part consisting of the hub and the disc, and a rim connected to the disk by means of fillets, the radius of which is equal to half the thickness of the rim, then separate the rim from the Central part of the cutting of the cutting tool along the line of connection of the drive and fillets, and before the Assembly is subjected to machining the rim and the Central part. The invention solves the problem of improving the dynamic properties of the wheel and increase the stability properties of the absorber. 2 S. and 2 C.p. f-crystals, 3 ill.

The present invention relates to compound the om and the rim.

Integral rail wheels are well known. They are used, in particular, in the trams, urban transport, to limit noise arising from the rolling wheels on the rails.

Known composite railway wheel containing the rim, the Central portion of which consists of a hub, disk and shock absorber located between the Central part and the rim flange and the means of its fastening, and rim has in its inner part two chamfers located on one and the other sides of the plane of symmetry of the wheel and connected at their inner part of the annular band, the cross section of the absorber has the shape of a Tulip, which consists of two rings, each of which is made of a polymeric elastic material (See. the UK patent N 674799, B 60 B 9/10, 1952, page 8).

The offered wheel is different in the amount of signs p. 1 of the formula, the ring of polymeric elastic material is compressed between the upper and lower metal sheets, with the upper sidewall installed (done) interoperable with the most inner part of the rim, and the bottom sidewall mounted for engagement with the flange.

The aim of the present invention yavlyaete with improved dynamic properties in the axial and radial directions and ensuring good stability properties of the absorber during operation.

The problem is solved using the compound of railway wheel containing an annular rim, a Central portion, a shock absorber located between the Central part and the rim, at least the flange and means for fastening at least one flange, wherein the rim has at its inner side opposite the axis of the wheel, two chamfers, located on either side of the plane of symmetry of the wheel and United in their most inner part of the annular band, usually flat, so that the shock absorber has a cross section in the form of a Tulip and the absorber consists of two rings of the polymer elastic material, each of which is sandwiched between the upper metal ring and the lower metal ring that are adjacent to the polymeric material, with metal top ring interacts with one of the annular fillets tape the most inner part of the rim, and the inner metal ring interacts with the flange.

Preferably, the composite railway wheel contained two flanges which clamp the shock absorber, are held by bolts passing through the Central part of the wheel and obespechiva, located in the annular groove of the rim.

To reduce noise, it is desirable that the mass of the rim was less than 110 kg, radial dynamic stiffness of the wheel should be in the range from 6108until 18108N/m, and the axial dynamic stiffness of the wheel should be in the range from 3108to 8108N/m

To reduce transmission of vibrations from the road to the axis of the weight of the rim should be less than 110 kg, radial dynamic stiffness of the wheel should be less than 1108N/m, and the axial static stiffness must be greater than 1108N/m, and the axial static stiffness of the wheels should be more 0,5108N/m

The invention relates also to a method of manufacturing the rim and the Central part of the railway wheel, according to which:

- made from steel billet by forged composite wheel, containing the Central part, consisting of the hub and the disc, and a rim connected to the disk by means of fillets, the radius of which is equal to half the thickness of the rim;

- separate the rim and the Central part, for example, on stamping stamp on the connection line drive and fillets;

- cast machined rim and the Central part.

Below the invention p, the de shows:

- Fig. 1 shows a radial half section of a composite railway wheels,

- Fig. 2 shows a view on an enlarged scale sectional damping ring;

- Fig. 3 shows a half view in axial section of the flange.

Composite railway wheel according to the invention consists of a kit of parts as solids of revolution, which contains the rim 1, the Central monoblock part 2, consists of a hub 22 and the disk 6, the two flanges 3 and 4 connected on the periphery of the disc 6, and the damper 5, located between the flanges 3 and 4 on the one hand and the rim 1 with the other hand. The flanges 3 and 4 are located opposite each other on one and the other side of the disk 6 of the Central part 2 and held in the depressed state to the disk 6 a large number of bolts 7 which pass through the flange 3 and the disk 6 and screwed into a large number of threaded holes 8 and the other flange 4. The bolts 7 are located on a circumference around the axis a-a of rotation of the wheel. As is shown in Fig. 1, the wheel may also contain a ring 8, is designed to reduce the noise of the rattle.

The most inner part 9 of the rim 1, i.e. the part that is closest to the axis a-a of rotation, has two chamfers the civil section 12 thus, to cut the most inner part 9 of the rim had the shape of a Tulip, which is located in the radial direction relative to axis a-a of the wheel and open to the outer part of the wheel.

Each flange 3 or 4 has a surface 13 that is designed to interact with the wheel disk 5, in the part located closer to the axis of rotation, an annular recess 15, the depth of the form which is half the thickness of the end 18 of the disk 6 and is designed for rigid connection with the end of the disk. Part of the end face 13, which is the farthest from the axis of rotation, has a configuration 24, which consists of the bucket 25, curves 26 and the flat section 27 and is designed in such a way that after installation of the flanges against each other they form a groove, the section which has the shape of a Tulip, which forms between the flanges 3 and 4 on the one hand and the rim 1 on the other hand the annular space, which features a shock absorber 5. The depth of the notches 15 in the axial direction is less than half the thickness of the end 18 of the disk 6 and is made so that after Assembly the two flange rested on the disk, not interacting with each other.

The absorber 5 consists of two identical wheels 19 and 20 adjacent to each other. Each wheel 19 and 20 has a core 30 of this form sidewall 31 is made thus to the sidewall interacted with the rim 1, and the shape of the sidewall 32 is designed in such a way that she interacted with the configuration 24 of the flange 3 and 4. It is preferable to use as the polymeric material rubber with fillers to adjust its stiffness.

The thickness of the absorber 5 a little more depth to the space that remains free between the rim 1 and the flanges 3 and 4 so that the shock absorber 5 has been compressed to reduce its thickness of one millimeter after installation of the flanges 3 and 4.

Designed wheel is easily installed and its advantage is that it allows for an optimal adjustment of its dynamic properties in the axial and radial directions, depending on the desires of the consumer. It is sufficient to adjust the hardness of the rubber forming the absorber or the height of the edges by the edge of the absorber.

So, really, you can either reduce the noise when rolling on the rails, or to reduce the vibrations caused by the rolling and transmitted to the axle, in particular, when the axis is connected directly with the motor.

It was found that in one and in other cases it is necessary PR is also indicated, that:

- to reduce noise while rolling radial dynamic stiffness should be between 8108to 1610108N/m, and the axial dynamic stiffness should be between 3108to 8108N/m;

- to reduce the transmission of vibrations of the radial dynamic stiffness should be less than 1108N/m, and the axial dynamic stiffness must be greater than 1108N/m, preferably axial static stiffness was more 0,5108N/m

Due to the fact that the shock absorber consists of a ring having a core of rubber, enclosed between the two sides of the sheet adjacent to the sidewalls, significantly improves the operational stability of the wheel. Indeed, the sides of the sheet, which are surrounded by rubber, impede the fluidity of the rubber under the influence of stresses. Thus, we achieve better stability properties of the shock absorber at his work.

This absorber can be manufactured very easily by direct casting of rubber between the sides of the sheet. To ensure the rubber seal is sufficient to prepare the surface of the sidewalls, subjecting them to sandblasting or shot blasting cleaning.

Kolesova compared with the wheel, manufactured according to the prototype. Indeed, for the manufacture of these wheels can be adovate one monoblock wheel that contains the hub, disc and rim connected to the drive fillets, the radius of which is equal to half the thickness of the rim, and then to separate the rim from the Central part, consisting of the hub and the disc, for example, by cutting along the junction line between the fillets and the disk. It is enough to perform minor mechanical processing for removing burrs after cutting.

According to one variant of the shock absorber consists of two rubber bands with the appropriate length and cross-section, which is glued directly onto the rim with glue. This method is characterized by the advantage is that it allows instead of pre-made rings which are adapted to each diameter of the wheels, just use wound in a roll of tape, which is enough to cut off a certain length.

These composite wheels are particularly suitable for equipment of urban or suburban railway transport, such as metro or tram. Usually the nominal diameter of these wheels is approximately in the range from 400 to 920 mm

1. Sotnya between a cylindrical section 12, the Central part 2, consists of a hub 22 and a disk 6 having in cross section the shape of a Tulip, the shock absorber 5, comprising two rings 19 and 20 made of elastic polymer material, the two flanges 3 and 4 and means 7 for fastening the rim 1 and the absorber 5 disk 6 of the Central part 2, characterized in that each ring 19, 20 provided with an upper metal sidewall 31 and the lower metal sidewall 32, the bucket 10 and 11 of the inner part 9 of the rim 1 are located on either side of the plane of symmetry of the wheel and placed with the opportunity to interact with top metal sidewall 31, the two flanges 3 and 4 are also located on either side of the plane of symmetry of the wheel and mounted for engagement with the lower metal sidewall 32 of the rings 19 and 20.

2. Wheel under item 1, characterized in that the means 7 in the form of bolts passing through the Central part 2, designed for compression of the shock absorber 5 and providing a pressing both of the flanges 3 and 4 to the absorber 5.

3. The wheel on the PP. 1 and 2, characterized in that it is provided with a ring 8, designed to reduce the noise of grinding and located in the annular groove of the rim 1.

4. A method of manufacturing a compound W is cooking and machining of the rim and the Central part, characterized in that initially made from steel billet by means of forged monoblock wheel having a rim connected to the disk by means of fillets, the radius of which is equal to half the thickness of the rim, then separate the rim from 1 disk 6 Central part of the cutting of the cutting tool along the line of connection of the drive and fillets and machine rim and the Central part.

 

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