WO2011159267A1

WO2011159267A1 - Railway vehicle wheelset

Info

Publication number: WO2011159267A1
Application number: PCT/UA2011/000060
Authority: WO
Inventors: Андрей Владимирович СИДОРЧУК
Original assignee: Sidorchuk Andrey Vladimirovich
Priority date: 2010-06-16
Filing date: 2011-07-28
Publication date: 2011-12-22
Also published as: UA55398U

Abstract

The invention relates to mechanical engineering and, more specifically, to the production of wheelsets for freight and passenger cars, unpowered cars, electric trains and diesel trains used on main-line railways. The wheelset comprises an axle with single-flanged wheels mounted thereon. The axle and wheels are solid-rolled. The wheels are press fitted onto the axle so that the larger diameter of the hub openings is situated on the inner side of the wheels. The tolerances for the surface shape of the hub openings are a maximum of 0.025 mm for the roundness tolerance and 0.05 mm for the longitudinal section profile tolerance. Axle equipment of any known design can be press fitted onto the axle. The technical advantages of the invention are a simplified design and simplified manufacturing technique, improved strength properties, increased service life, the absence of premature wear on the wheel hubs and rims, and increased operating reliability and safety of the rolling stock.

Description

WHEEL PAIR OF RAILWAY TRANSPORT

The technical field to which the utility model relates.

The utility model relates to mechanical engineering, more precisely, to the designs of the running gear of rail rolling stock, and can be used in the production of wheeled pairs of freight and passenger cars, non-motorized cars, electric trains and diesel trains of the main railway.

State of the art

A wheel pair of a rail railway transport is known, containing an axis with wheels mounted on it, between the hubs and rims of which there is an elastic (rubber) element [see book: M.F. Verigo, A. Ya. Kogan. The interaction of the track and rolling stock. - M .: Transport, 1986. - S. 17-18].

The main disadvantage of such a pair of wheels is the complexity of its design, as well as the high cost due to the need for expensive and technologically sophisticated equipment for its manufacture. It should also be noted that the use of an elastic element made of polymeric materials (rubber) without devices for adjusting its stiffness, as a result of a relatively rapid change in the viscoelastic characteristics of these materials (creep, relaxation), significantly reduces the reliability of operation of a known wheel pair - after all, instead of the initial tension in the metal-rubber joint, clearances that cannot be compensated for in this design.

Partially, this drawback was eliminated in the known wheel pair of rail vehicles containing two wheels and a hollow axis filled with grease, with a piston and float valves dosing lubricant placed through channels made in the axle cavity and wheel disks , under the action of centrifugal force, the flange with the rail heads enters the friction zone [see but. from. USSR N ° 1206156 for classes В61К 3/00, В61К 3/02, published on January 23, 1986 in Bull. Ns 3].

This wheelset is mainly equipped with non-separable cast wheels, therefore, its design is more reliable in operation in comparison with the analogue described above. However, a significant drawback of the known wheelset is that its design provides for the presence of channels in the cavity of the axle and wheels. The irrationality and inefficiency of such a technical solution is explained as follows. Firstly, channels reduce the overall rigidity of the structure due to the weakening of the cross-sectional area of the axle and wheels. Secondly, the design of the wheels is unreasonably complicated due to the complexity of the implementation of the aforementioned channels in their cavity. Considering that the diameter of the channels through which the grease passes is small in the wheel disks, and considerable axial forces arise during contact of the wheel flanges with the rail heads, in practice it is quite possible to clog or clog the specified channels with wear products or any other contaminants, as a result of which, naturally, the supply of grease to the rail heads is broken or completely stops.

The closest in essence and the achieved effect, taken as a prototype, is a wheeled pair of railway transport containing an axle with single-side wheels mounted on it, while the axis is hollow, and the wheels are mounted for rotation [see Russian patent Ns 26502 U in class B61 F 5/00, published December 10, 2002].

The main disadvantage of the known wheelset is the presence in the design of the hollow axis. This disadvantage is as follows. A through hole in the axis significantly reduces its technical and operational characteristics due to the weakening of the total cross-sectional area of the axis. This leads to cracking and cracking. scrap metal axis in the concentration of maximum stresses. Such a wheelset can be used, perhaps, only in the running gear of light compact cars, but even under these operating conditions, its working life is extremely limited.

Also a disadvantage of the known wheelset is the complexity and laboriousness of the technology for its manufacture, associated primarily with the need to perform the aforementioned hollow axis - light and at the same time quite durable. At the same time, at all stages of the manufacture and assembly of the wheelset, different types of equipment are used, which increases the number of production operations and, of course, increases the cost of the finished product.

A further disadvantage of this wheelset is that the wheels are rotatably mounted on the hollow axis. During active use, especially on curved sections of the rail track, this type of connection of the wheels with the axle entails the rapid wear of the wheel hubs and, accordingly, of the underside of the axle as a result of friction and partial destruction of the metal, which inevitably occur at maximum stresses. As a result of this, balancing of the wheels on the axis occurs, the shape of the rolling surface of the wheel rims changes, there is an increased wear of the wheels and track and, as a consequence, the need for overhaul of the wheelset.

Another significant drawback of the known pair of wheels is that its design does not provide for the presence of axle boxes that perceive and transmit static and dynamic load from the car to the rails.

The utility model is based on the task of simplifying the design and manufacturing technology of a wheelset while improving its reliability and improving technical and operational characteristics by optimizing its strength and geometric parameters and ensuring the transmission of static and dynamic loads by completing the wheels pairs of high-strength wheels and axles and precise determination of the tolerances of the shape of the sections of the holes of the wheel hubs, as well as by equipping the wheelset with axle boxes.

Utility Model Essence

The solution to this problem is achieved by the fact that in a wheeled pair of railway transport containing an axle with single-flange wheels mounted on it, according to the proposal, the axle and wheels are made continuous in sections, while the wheels are pressed onto the axle so that the larger diameter of the holes the hubs are located on their inner side, and the dimensions of the tolerances of the surface shape of the holes of the hubs do not exceed 0.025 mm for the tolerance of roundness and 0.05 mm for the tolerance of the profile of the longitudinal section.

Under the customer’s order, the axle ends can also be equipped with axle boxes of any known design.

Thanks to the use of solid wheels and axles, the strength characteristics and service life of the proposed wheelset are significantly increased, and the scope of its application is expanded: it can be effectively used in the design of the chassis of most modern freight and passenger cars. At the same time, production technology is simplified and the number of production operations is reduced, which positively affects the cost of finished products.

Due to the fact that the wheels are pressed onto the axle with an interference fit, and the dimensions of the tolerances of the surface shape of the holes of their hubs are precisely determined, the problem of premature wear of the wheel hubs and, accordingly, balancing of the wheels on the axle disappears. Technological tolerances of the shape of the surface of the holes of the wheel hubs are optimal and sufficient for a high-quality press fit of the latter, while meeting the requirements

Interstate standard GOST 4835-2006. Due to the fact that the design of the proposed wheelset provides for the possibility of equipping it with axle units, the reliability and safety of the carriage movement are significantly increased. The axleboxes are located on the necks of the axle and perceive and transmit to the wheelset the gravity of the car, as well as the dynamic loads arising from the movement of the car. The axleboxes protect the axle neck from contamination and damage, act as a reservoir for oil, and also limit the longitudinal and transverse movements of the wheelset relative to the frame of the car.

The list of figures illustrative materials

Figure 1 is a side view of a pair of wheels of type RU1Sh-957 without axle boxes;

Figure 2 is a side view of a pair of wheels of type RU1Sh-957 with axle boxes.

Description of the preferred embodiment of the utility model

The proposed wheelset of the rail rolling stock contains a forged (or one-piece) axle 1, on the necks of which 2 two single-flange solid wheels are pressed 3. The proposed wheelset of the rail rolling stock can be equipped with axle boxes 4 pressed onto the necks 2 of the axle 1. The design of axle boxes 4 can be any, it is chosen depending on the type of wheelset, type of car, maximum static load from the wheelset on rails and other technical and operational indicators.

The proposed technical solution is tested in practice. The proposed wheelset is manufactured, for example, according to the drawings 100.10.000-11 SB “Wheel pair of type RU1Sh-957-G without axle boxes” and 100.10.000-12 SB “Wheel pair of type RU1Sh-957-G”, and does not contain any elements or materials that could not be reproduced at the present stage of the development of science and technology, in particular, the production of wheelsets, therefore it is acceptable for industrial use, has technical and other advantages over the known analogs gami thanks to the proposed design simplifications and changes m, which confirms the possibility of achieving a technical result of the claimed object. In the well-known sources of scientific, technical and other information, no wheelset was found with the set of essential features indicated in the proposal, therefore, the proposed technical solution is considered such that it can receive legal protection. Utility Model Technical Advantages

The main technical advantages of the proposed technical solution, in comparison with the prototype, include the following:

- simplification of the design and manufacturing technology by completing the proposed wheelset with cast wheels and an axle;

- improvement of strength characteristics and increase in service life for the same reason;

- the absence of premature wear of the hubs and rims of the wheels due to the press fit of the latter with precise determination of tolerances of the surface shape of the holes of their hubs;

- improving the reliability and safety of the rolling stock due to the possibility of equipping the proposed wheelset with axle boxes of any known design.

Claims

USEFUL MODEL FORMULA

1. A wheeled pair of railway transport containing an axis with single-flange wheels mounted on it, characterized in that the axle and wheels are made solid in cross section, while the wheels are pressed onto the axle so that a larger diameter of the hub holes is located from their of the inner side, and the dimensions of the tolerances of the shape of the surface of the holes of the hubs do not exceed 0.025 mm for the tolerance of roundness and 0.05 mm for the tolerance of the profile of the longitudinal section.

2. A wheelset according to claim 1, characterized in that axle boxes of any known construction are installed at the ends of the axle.

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