WO2015167364A1

WO2015167364A1 - Railroad cars or platforms equipped with autonomous power supply

Info

Publication number: WO2015167364A1
Application number: PCT/RU2015/000233
Authority: WO
Inventors: Valery Valerievich BUROV; Mikhail Igorevich SUKOVATIN; Sergey Vladimirovich KUZYARA; Valentin Gennadjevich KARGIN
Original assignee: Obshestvo S Ogranichennoy Otvetstvennostju "Noveka"
Priority date: 2014-04-29
Filing date: 2015-04-09
Publication date: 2015-11-05
Also published as: EA201600180A1

Abstract

The railroad car or the railroad flat car with the autonomous power supply system powered from the wheel set shaft including centre girder of the car or the flat car frame, the undercar generator installed in the undercar space, a double-stage reducer for transmitting torque from the wheel set shaft to the generator. The abovementioned reducer preferrably comprises a single-stage gear reducer and single-stage belt drive. The railroad flatcar may also have a system for generator control, a system of conversion and stabilization of voltage and current, a system of electrical-circuit protection, a system of electrical connectors for connecting all possible types of consumers, a system of electrical equipment and circuit diagnostics. The technical result of the proposed solution is to increase reliability of the mechanical section of the system, decrease consumption of materials, increase operational characteristics and construction safety.

Description

RAILROAD CARS OR PLATFORMS EQUIPPED WITH AUTONOMOUS POWER SUPPLY

DESCRIPTION

This claimed Technical solution refers to railway transport and particularly to railway rolling stock and systems for power supply thereof. The solution relates to electrical equipment of cargo transport vehicles for which availability of the autonomous power supply source during transportation of cargo is a must.

Perishable goods, mostly represented by foodstuffs are of significant social importance. Their transportation by rail is crucial in supply of foodstuffs for the country population.

To transport perishable goods a special purpose railway rolling stock is used, particularly the group refrigerated rolling stock (GRRS) , which comprises several refrigerated units including freight cars and a service car comprising the diesel generator unit and an utility room for the maintenance crew, separate refrigerated cars (SRC) , usually self-contained refrigerated cars (SCRC and SRCS-UR) , T cars (TC) ,

refrigerated unit freight cars reequipped for transportation of perishable goods in "thermos" mode (refrigerated TC) and some other separate refrigerated cars.

In a railway transport perishable cargo is represented by 21 foodstuff items which are further divided into two

subcategories: goods transported in "thermos" cars (TC

suitable cargos) and goods transported in refrigerated cars ("REF" cargos) . In 2013 the range of perishable goods

transported by rail was as follows: fish, meat, sausage products, fruits, vegetables, dairy products, beer, juices, soft drinks, preserved foods, margarine products etc. The freight market may be divided into two main cargo

subcategories : - meat, fish, fruits, sausage products (25.2%) meant for transportation in the group refrigerated rolling stock (GRRS) and in TCs for short distances;

- TC suitable cargos meant for transportation in SRCs and refrigerated containers: fruits, vegetables, margarine

products, beer, juices, preserved and other products (74.8%).

Today transportation of perishable goods in Russia is realized on the basis of the following train aggregation methods :

- refrigerated containers are transported only in coupled units consisting of 12 special purpose electrified flat cars along with a car with the diesel generator unit;

- method of coupled units aggregation from 4-5 special purpose refrigerated units serviced by the maintenance crew alongwith a car with the diesel generator unit (GRRS

technologies) ;

- refrigerated containers are transported in coupled units consisting of up to 6 electrified flat cars equipped with the diesel generator unit as a power source; these cars are being a part of GRRS units serviced by the maintenance crew;

- methods of perishable goods transportation in separate TCs for short distances with the predefined temperature range provision and delivery dates specified in transportation regulations for this category of cargos.

Transportation of perishable goods in refrigerated

containers are an alternative to transportation in

refrigerated cars as well as the competitive technology in this market segment.

Ability to organize shipping of a single flat railroad cars equipped with the autonomous power supply system allows substantial reduction of down-times coused by waiting for loading/unloading, widen of the sales geography, the required temperature range provision for this cargos category during transportation as well as substantial cost reduction for energy and maintenance due to use of the wheel set axle rotation as an energy source.

A flat railroad car equipped with the power supply system for cargos with high energy consumption - preferably

refrigerated containers is known in the art (patent RU No. 45693) . According to the the proposed device electric power is delivered to the flat car from the external source through a power transit cable laid in each car or flat car along the entire rolling stock. This power cable is coupled with the power connectors at the respective car junction points, thus forming a single transit power trunk.

Each car or a flat car is equipped with distributive boxes and power sockets for wiring of refrigerated container power connectors .

One major drawback of this device lies in requirement of an external power supply source.

There is also known a railroad flat car equipped with the power supply system to serve cargo energy requirements (patent RU No. 45693) .

There are also known devices for cars power supply with V- belt car generator drives which are actuated by the center part of the wheel set axle(L.V. Tereshkin, "Generator drives for passenger cars", "Transport" publishing house, Moscow, 1968, p. 6-8, fig. 4; I.A. Morozov et al . , "All-steel

passenger cars", "Machine building" publishing house, Moscow, 1965, p. 169-170, fig. 87, "V-belt drive actuated by the center part of the axle") .

The car power supply system according the patent RU No. 2264928 is also known. The system consists of 2 generators rotating in opposite directions by means of a belt drive and an electronic control system for generator energy conversion.

This device has the following drawbacks: - power transferred through the belt drive from the wheel set axle to the generator is limited by the driving and

following pulley transmission ratio depending on the wheel size and the height of the undercar space with due

consideration for standards applicable to the track structure height in the undercar space;

- for the V-belt replacement it is necessary to roll out the wheeled cart from under the car or the flat car and release the wheel set to place a new belt onto its axle except for those cases when a split drive belt is used;

- the minimum belt length is limited depending on the possibility to place it on the pulley what leads to an

increase in dimensions of the generator suspension rigid frame; otherwise it is necessary to use a split drive belt which ranks below than a one-piece belt judging by its

properties .

This system was selected as the closest prior art.

A common drawback of these known systems is low

serviceability, i.e. the inability to simultaneously provide the following properties: ease of service and replacement of wear parts, small free dimensions in the undercar space, high generator power capacity.

Technical result of the proposed solution lies in increase of the system mechanics reliability (particularly

serviceability) , decrease of the materials consumption, as well as enhancement of the whole structure durability and safety .

The objective of the proposed solution is to expand the products range of under car generators.

The declared technical result is applied by the railroad car or prefferrably the railroad flat car is supplementary

equipped with the autonomous power supply system represented by "generator + double-stage reducer" mounted on the rigid frame, fixed with one end to the centre backframe (girder (frame) ) of the ralroad car and/or the railroad flat car and supported by the quill shaft mounted on the wheel set shaft from the other end. The abovementioned reducer preferrably comprises a single-stage gear reducer and single-stage belt drive .

BRIEF DESCRIPTION OF DRAWINGS

Fig. la, lb, lc displays an exterior of the proposed device.

Fig. 2 shows mounted wheels with the attached reducer gear with generator assembly.

Fig. 3 shows a cross section of the reducer along the axis of the countershaft and along the axis of mounted wheels.

NOTATIONS

1 - undercar generator.

2 - drive gear.

3 - driven gear.

4 - split quill shaft.

5 - countershaft.

6 - wheel set shaft.

7 - split rubber inserts.

8 - driving pulley.

10 - belt (or belts) .

12 - rigid frame ( .

15 - suspension.

18 - bearing housing.

101 - backframe of the car or the flat car.

102 - wheel set block with a reducer and a generator.

103 - duct for electric transducers, electrical connectors, control and other service systems.

104 - cables.

The system is illustrated in Figs la, lb, lc, 2, 3. The system operates as follows.

Proposed system consists of rail mainly stack flatcar 101 or car and autonomous power system in the form of generator attached to reducer 102 actuated by the wheel set shaft. The reducer is made double-stage to decrease the dimensions of the autonomous power system. The first stage is preferrably a gear drive. The second stage is preferrably a belt drive.

Additionally, the system can comprise power and interface trunks 104 with connectors for connecting consumers on the flatcar or the car as well as with connectors for connecting adjacent cars to trunks for power transiting along the rail stock.

In addition there can comprise electronic unit for

controlling generation of electrical power including the following subsystems and devices:

- electrical transducers providing compliance of output parameters of general power line supply and additional lines to consumers of all possible variants of transferred cargos,

- systems of anti-overstress, systems of short circuit, etc.,

- transducers of voltage and current,

- stabilizing devices,

- system of power recuperation.

It is feasible to install blocks for service functions realization, for example, navigation devices, sensors of temperature, humidity, pressure, recording of cargo parameters for reporting.

All or a part of said additional devices, blocks and

connectors can be incorporated in undercar duct 103.

The system of flatcar or car with autonomous power comprises railroad stack flatcar or railroad car 101, undercar generator 1 and at least a double-stage drive. The first stage is a gear drive (pinion drive) . Driving wheel 2 is mounted on split quill shaft 4, tooth-wheel (gear) 3 is fixed on countershaft 5. Quill shaft 4 is fixed on the axis of wheel set shaft 6. The second stage is a belt drive in the form of driving pulley 8, driven pulley fixed on the generator shaft, belts 10.

Driving pulley 8 is fixed on countershaft 5. The driven pulley is on shaft of generator 1. Generator 1 and countershaft 5 are mounted on frame 12. At one side, frame 12 is rested by two bearings of housing 18 on quill shaft 4; at the other side, by suspension 15 connected with one end with frame 12; with the other end, with the backframe of car or flatcar. Suspension 15 has two degrees of freedom along horizontal axes.

The second stage of reducer can also be gear (tooth-wheel) . In this case, it is necessary to introduce a clutch with soft properties to provide a soft characteristic of the mechanism.

The proposed devise operates as follows.

During movements of the railroad car or railroad flatcar on railways, the mounted wheels transmit torque to shaft of generator 1 through quill shaft 4 with drive gear 2 fixed on it, driven gear 3, countershaft 5, driving pulley 8, belts 10 and driven pulley fixed on shaft of generator 1. Generator generates electrical power part of which is transmitted to the main consumer; the other part is transformed in accordance with the requirements of service devices.

Rigid fixing of the "generator + reducer" system to the shaft of mounted wheels and pivot suspension 15 allow frame 12 to follow the turn of the shaft of mounted wheels with respect to the frame of car or flatcar when passing curved segments of the track.

Thus the proposed solution provides the autonomous power supply system of cargos mounted on a flatcar or a car from the shaft of mounted wheels when passing straight and curved segments of the track.

At present the declared solution makes it possible to obtain electric power transmitted to the consumer at the level up to 36 KW.

The proposed system is industrially applicable since it can be made on existing industrial plants in series.

Claims

1. A railroad car or a railroad flat car with the autonomous power supply system powered from the wheel set shaft comprising backframe of said railroad car or said railroad flat car, undercar generator mounted in the undercar space and attached to the backframe of the car or the flat car and to the wheel set shaft, reducer for transmitting torque from the wheel set shaft to the generator; wherein the specified reducer is double-stage.

2. The railroad car or the railroad flat car according to claim 1 further comprising a system for generator control.

3. The railroad car or the railroad flat car according to claim 1 further comprising a system of conversion and

stabilization of voltage and current.

4. The railroad car or the railroad flat car according to claim 1 further comprising a system of electrical-circuit protection .

5. The railroad car or the railroad flat car according to claim 1 further comprising a system of cables and electrical connectors for connecting all possible types of consumers.

6. The railroad car or the railroad flat car according to claim 1 further comprising a system of electrical equipment and circuit diagnostics.

7. The railroad car or the railroad flat car according to claim 1 further comprising a system of monitoring of

generation system and power consumption system.

8. The railroad car or the railroad flat car according to claim 1 further comprising a system for recording of

parameters of all board systems and transferred cargos.

9. The railroad car or the railroad flat car according to claim 1 further comprising a communications system for data communication .

10. The railroad car or the railroad flat car according to claim 1 further comprising a system of global navigation.

11. The railroad car or the railroad flat car according to claim 1 further comprising a system of power recuperation.