Lipless bimetallic brake shoe for locomotive

FIELD: railway transport; brakes of rolling stock.

SUBSTANCE: proposed brake shoe contains cast iron bar on rear side of which boss is arranged containing steel member for wedge-like cotter of shoe holder made in form of shaped section of steel plate enclosing the boss. Hole to pass wedge-like cotter is made in boss. Member is secured on steel plate covering bra from rear side and passing under boss. Found at edges of bar over ends of steel plate are T-shaped cast iron projections for engagement with brake shoe holder. Inserts made of material, abrasiveness differing from abrasiveness of cast iron bar are fitted in body of cast iron bar. Inserts are cylindrical, being arranged on steel plate with embedding into cast iron bar in two groups. Centers of three nearest inserts in each group are equidistant from each other. Groups of inserts are separated by section without inserts, and four extreme cylindrical inserts in groups are provided with ring grooves on side surface. Each group consists of seven insets.

EFFECT: increased balanced service life, reliability, efficiency increased service life of wheels owing to reduction of their wear caused by brake bimetallic shoes.

12 cl, 5 dwg

 

The invention relates to railway transport and relates to brake equipment of the traction rolling stock gauge 1520 mm.

Known brake pad containing the arcuate casting in the form of a beam of rectangular cross-section, consisting of a main and profile plots, while in the body of the beam from the side of the working friction surfaces made at least two parallel rows of cylindrical steel inserts. The inserts are placed in a checkerboard pattern. In the profile plot are four core insert, vzaimodeistvie together with the body of the pad with a bandage pair of wheels of the locomotive. Patent No. 2153994, M CL VN 1/00, F16D 65/04, 69/00, bull. No. 22, 10.08.2000,

A disadvantage of the known brake pads is moderate wear on the crest of the bandage from the effects of the relevant section of the pad, as well as increased weight pads due to the presence of the profile plot.

Known brake of a rail vehicle containing friction pair consisting of a wheel and brake pads. In the body of the pad is fixed a rigid insert located symmetrically relative to the transverse axis of the pad at a distance apart equal to not less than half the length of the pad. Patent No. 1572889, M CL VN 1/00, bull. No. 23, 1990, p.95.

Inserts made of special cast iron with high hardness, which calls the characteristic intense wear of the wheels.

Performing inserts, prism, continuous surface friction affects the heat sink and contribute to the greater wear of friction pairs and reduce the braking force due to the reduction of the coefficient of friction.

The closest is the design of the brake pads with solid inserts for locomotives. Krylov V.I., Perov, A.N., Ozolin, A., Klimov NI Handbook on the brakes. - Ed. 3rd, revised and enlarged additional M.: Transport, 1975, S. 377, RES. The pad can be ridge and bezgrebnevogo. It consists of an arcuate curved cast-iron beams, in whose body the working side of the longitudinal rows posted by insertion of a material with abrasive, non-abrasiveness of cast iron beams. On the back of the beam, there is a metal steel narrow plate, located in the center of the beam and passing under the tide. On the back is a burst of cast iron containing element from steel tapered pin of kolokotrones. The item is made of steel in the form of a bracket, the legs of which are welded to a steel metal plate. On the back of the beam over the ends of the steel plate is made T-shaped protrusions to mate with the brake Shoe.

This device inserts are made of cast iron with high hardness HB-400, which causes heavy wear of the surface of the wheels.

Inserts are then who are in the lower part of the cast-iron beam pads and are not connected with a steel metal plate, what worsens the heat sink.

Install wedge cheques steel bracket, which is fixed by welding on a steel plate and filled in the sides of the cast iron does not have sufficient reliability.

The objective of the invention is the creation of a new design of bimetallic brake pads for locomotive, having raised a balanced life, reliability, efficiency, allowing to increase the life of the wheels of the rolling stock by reducing wear them bimetallic brake pads and a complete lack of impact pads on the crest of the bandage. New design allows you to improve the technology of making shoes while improving their quality.

This object is achieved in that a pad new design without specialized area and with reduced weight.

Bezgrebnevogo bimetallic brake pad for locomotive contains cast iron in the form of an arcuate curved cast-iron beam, on the back side of which is a burst containing an element from steel tapered pin of kolokotrones. The item is made of steel in the profile section of the steel plate covering the tide. The tide passes the hole wedge pin, and the side surfaces of the profile section at the level of the holes are open for the exali pads wedge cotter in columntitle, the element is mounted on a steel plate covering the beam from the back side and passing under the tide. The edges of the beam over the ends of the steel plate is made T-shaped protrusions from cast iron for interfacing with the brake Shoe. In a body cast iron beams posted by insertion of a material with abrasive, non-abrasiveness of cast iron beams. Inserts are cylindrical in shape and placed on a steel plate by immersing in a cast iron beam. The inserts are placed in two groups, each of which centers the next three inserts equidistant from each other. The group shares the plot without inserts. Four extreme cylindrical insert in groups made with annular grooves on the lateral surface, and each group consists of seven elements.

The insert is made of heat-resistant steel.

The rows of inserts deployed relative to the longitudinal axis of the body of the pad in one direction by the angle α=10-11°.

The area R without inserts between groups of inserts is determined by the formula

P=(0,14÷0,16)×S,

where P is the size of the plot without inserts;

S - full working surface of the pad.

The working surface of the brake pads and paste from the working surface is made with a slope of 1:20.

Square T of the working surface of the pad without inserts are calculated according to the formula

T=(5,6÷7,2)×t,

where T is the area of work is her surface;

t - the amount of the working surfaces of the inserts.

The diameter d of the cylindrical insert is found by the formula

d=(0,18÷0,30)×,

where d is the diameter of the cylindrical insert;

In - the width of the working surface of the pad.

The distance between the centers of the cylindrical inserts in the group is found by the formula

C=(0,10÷0,12)×L,

where C is the distance between the centers of the cylindrical inserts in the group;

L is the length of the pad.

The length of the cylindrical insert And is found by the formula

A=(0,91÷0,93)×N,

where a is the length of the cylindrical insert;

H - the thickness of the pads without the thickness of the steel plate.

All cylindrical insert from the side of the working surface of the pad when casting iron beams pour 2-3 mm layer of iron.

The abrasiveness of the material of the inserts is greater than the abrasiveness of the material body pads.

A steel insert is fixed on the plate of the steel frame by spot welding.

The novelty of the proposed design bezgrebnevogo bimetallic pads for locomotive consists in the following.

- Insert is made of heat-resistant steel with abrasive, non-abrasiveness iron bar.

Inserts are cylindrical in shape and placed on a steel plate by immersing in a cast iron beam.

- The inserts are placed in two groups, in each of which the centers of the three closest stavo is equidistant from each other, group inserts divides the plot without inserts. Each group consists of seven elements.

- Formulas for definition: area of land, without inserts R, the area of the working surface of the pad without inserts T, diameter of cylindrical insert d, the distance between the centers of the cylindrical inserts in the group, the length of the insert A.

The working surface of the brake pads and paste from the working surface is made with a slope of 1:20.

Four extreme cylindrical insert in groups made with annular grooves on the lateral surface.

The design of the proposed bezgrebnevogo bimetallic pads for locomotive can increase the reliability and efficiency of the brake pads by increasing its wear resistance and coefficient of friction.

The technical result is achieved due to the following essential features of the invention.

A steel insert in combination with a steel tape rear pads provide reliable heat and cool the working parts of the pad.

The design of the pads and the material of the inserts, from which they are made, ensure the emergence of elastoplastic friction. High mechanical properties that exceed the bimetal and one-piece cast-iron block, allow it to operate at the final stage of wear before you replace when thickness is 0.16 initial size of its thickness. Provided uprugosti friction and conservation of the coefficient of thorns at a temperature of pads in the 1100°increases the service life of the pad.

In the proposed design is a specialized area pads, interacting with the crest of the wheel tread, which prevents its deterioration, it also reduces the weight of the pads.

The requested block is a further development of the famous family of bimetallic pads. In the brake Shoe and its posterior part (after the installation) made in the form of steel plates with areas of the same shape curved curved beam, and located between them in the middle part of the profile plot, covering the iron tide. Thus, the tide covered additionally with the sides and top of the field of steel, which can significantly increase the strength of the given node. In the side surfaces of the profile area has a window located opposite the holes in the tide, for fixing pads wedge-shaped cotter of kolokotrones.

The plate is placed and secured by spot welding cylindrical insert with installation groups, with each group of seven inserts. In each group the centers of the three nearest inserts equidistant from each other. This allows precise positioning of the insert in the body of the pad to avoid bias when saliuk is cast iron, and significantly reduces the defects in the manufacture and improves the quality of the pads.

After such staffing plate cylindrical inserts and their rigid attachment to her resistance spot welding, in fact, finished the back part of the pad is placed in a mold and pouring molten cast iron. The result on a steel plate, cast iron casting with posted inside her soft steel inserts of heat-resistant steel. Cast iron is poured and under the profile section of the steel plate. The pads are labeled in accordance with the resource that is governed by the number and diameter of the inserts.

Fabrication of inserts from the rod guillotine shears and forming them in the package directly on the steel frame pads spot welding machine allows you to automate the entire process of manufacturing pads, including fill blanks with a melt of cast iron, and release the pads from the form (mold), all of which dramatically reduces the cost of the pads.

Placement of inserts groups, the location of the rows of inserts with tilt-shift relative to the longitudinal axis of the pad at 10-11°, the existence of a plot of R without inserts ensures effective braking mode by improving the heat sink on the back side through a steel insert in combination with a steel plate is illinoi part of the pads and cooling of the working part of the pad, eliminating overheating of the pad, and thus ensures that at high speeds braking when the brakes on a long long slopes pads will not overheat and does not "flow", i.e. will not lose the coefficient of friction.

The ranges of the ratio entered in the claims, as a significant distinguishing features were set experimentally as a result of bench tests.

The offset rows of inserts due to their deviation from the longitudinal axis of the pad on α=10-11°selected distance between centers of inserts in the series allow for the overlap width of the rubbing surface of the pad inserts, prevents the formation of longitudinal cracks on the row in the manufacturing process and during operation, ensures minimum wear of the pads and uniform abrasion of the entire height of the pad across the surface, which affects the increase of resource blocks, and reduces the wear of the wheel at high speed braking.

Compliance with the ratios of the square of the friction of the working surface of the pad without inserts T depending on the amount of working surfaces of the inserts t and the diameter of the cylindrical insert d of the width of the working surface of the pad provides effective braking at various speeds of movement of the moving part is.

The slope of the working surface of the pad and inserts provides a better fit without clearance, and interaction with the rolling surface of the wheel all inserts simultaneously in full working surface, creating elastoplastic friction, which increases the resource offer pads and significantly reduces the wear of the tread surface of the wheel, eliminating wear on the crest of the bandage.

All inserts of plastic metal cylindrical form, and some of them (extreme insertion) for a more reliable fastening of iron castings in steel girders have one ring groove on the lateral surface, which provides, as shown, a high reliability of connection bimetal construction pads in General and increases its service life. Insert place by grooves in the side of the steel plate.

The calculation of the length of the cylindrical insert, depending on the thickness of the pads, allows for the manufacture of pads to create an opportunity to fill their iron to a height of 2-3 mm, This allows the first braking to provide abrasion this layer, and then completely breaking the entire working surface of the pad to the tread surface of the wheel, including the insert. It also creates the best conditions for a pair of the rolling surface of the wheel and the Shoe and increases their lifespan.

As shown, d is URS bimetallic pads in 30-75 times the resource of any cast iron block.

Bezgrebnevogo bimetallic brake pad for locomotive shown in figure 1, figure 2, figure 3, Figure 4, Figure 5.

Figure 1 shows a General view of the pad, figure 2 - cut pads on plane A-a in figure 3, a cylindrical insert, Figure 4, a cylindrical insert with an annular groove on the lateral surface, figure 5 shows the form b

Bezgrebnevogo bimetallic brake pad for locomotive made in the form of a steel plate 1, adjacent to the arcuate curved iron bar 2 with length L, width B, thickness H, the body of which is placed a cylindrical insert 3 of diameter d, length And heat-resistant steel. The plate 1 has a profile section 4. Insert 3 is welded to the plate 1, and the entire package filled with iron, forming arcuate curved beam 2 (figure 1). In the side surfaces of the core section 4 is made open 5 located opposite the holes in the tide under 6 wedge-shaped pin of kolokotrones. On a steel plate 1 insert 3 is placed in parallel rows, the two groups. The number of inserts in group 7, the centers of the nearest inserts equidistant from each other at a distance From. the Insert 3 is attached to the steel plate 1 by the contact welding. The rows of inserts 3 are expanded relative to the longitudinal axis of the pad on the corner of 10÷11° in one direction. The working surface of the cast-iron beams 2 and insert 3 has a slope of 120 (Fig.1-4). On the back side of the cast-iron beam 2 is made T-shaped projections 7 for interfacing with the brake Shoe (Fig 1, 5). The area of the working surface of the pad T, t is the sum of the working surfaces of the inserts.

Figure 2 shows a cut block on plane a-a, where 1 is a steel plate with profile section 4 holds tide and box 5 for fixing pads wedge cotter in columntitle. The dotted line is shown welded to a steel plate insert 3.

Figure 3 shows the cylindrical insert 3.

Figure 4 shows the extreme steel cylindrical insert 3 having an annular groove on the lateral surface.

Figure 5 shows the placement of the T-shaped protrusion 7.

Working the friction surface of the Shoe consists of surface iron castings and surfaces of the inserts.

Insert 3 is made of ductile metal, heat-resistant steel having a higher abrasion M than the body material of the pad - cast iron S. Preferred excess abrasiveness of the material of the inserts is not less than 2 times. Proposed placement of inserts 3 in the body of the pad provides a solid contact pads with the wheel of the locomotive over the entire width of the bandage without breaks, with the exception of the working surfaces of the tongue, preventing it from wear and "undercut" block.

The operation of the brake pads is performed by pressing the working surface number of the DKI to brace the wheels of the locomotive, the resulting interaction provides elastoplastic friction coefficient>0,42. The conditions for the occurrence of elastoplastic friction:

a) the body of the block is cast iron, hardness 197-241% HB;

b) inserting a soft - steel, hardness 120-140% HB;

C) the surface of the wheel tread - steel, hardness 195-210% HB;

g) limit thermal stability pads with preservation of the specified coefficient of friction of not lower than 1100°C.

The combination of cast-iron body pads and soft inserts in the interaction and execution of friction with the rolling surface of the wheel not only provides elastoplastic friction, but it also prevents the "SW" wheelset locomotives on rails, which, in turn, ensures the absence of "sliders" on the wheelset and no wear ridge increases the life of the tire wheel steam locomotive as a whole.

Compared with the prototype of the proposed design is a specialized area, reduced weight pads, however, ensures the reliability of the brakes due to the high abrasiveness of the inserts and high coefficient of friction.

Due to the proposed technical solution increases the reliability and efficiency of the brakes of the locomotive with enlarged, as shown, dozens of times a resource pads and much less wear on the tires wheelset, the ri complete absence of wear of the ridges of the band from the impact pads.

1. Bezgrebnevogo bimetallic brake pad for locomotive containing cast iron in the form of an arcuate curved cast-iron beam, on the back side of which is a burst containing an element from steel tapered pin of kolokotrones, the element made of steel in the profile section of the steel plate covering the tide, the tide passes the hole wedge pin, and the side surfaces of the profile section at the level of the holes are open for fixing pads wedge cotter in columntitle, the element is mounted on a steel plate covering the beam from the back side and passing under the tide, along the edges of the beam over the ends of the steel plate is made T-shaped protrusions from cast iron for interfacing with the brake Shoe, characterized in that the body iron beams posted by insertion of a material with abrasive, non-abrasiveness of cast iron beams, while the inserts are cylindrical in shape and placed on a steel plate by immersing in a cast-iron beam, the inserts are placed in two groups, each of which centers the next three inserts equidistant from each other, groups of inserts divides the plot without inserts, with four extreme cylindrical insert in groups made with annular grooves on the lateral surface, and each gr is the PAP consists of seven inserts.

2. Bezgrebnevogo bimetallic brake pad for locomotive according to claim 1, characterized in that the insert is made of heat-resistant steel.

3. Bezgrebnevogo bimetallic brake pad for locomotive according to claim 1, characterized in that the rows of inserts deployed relative to the longitudinal axis of the body of the pad in one direction by the angle α=10-11°.

4. Bezgrebnevogo bimetallic brake pad for locomotive according to claim 1, characterized in that the area R without inserts between groups of inserts is determined by the formula:

P=(0,14÷0,16)·S,

where P is the size of the plot without inserts;

S - full working surface of the pad.

5. Bezgrebnevogo bimetallic brake pad for locomotive according to claim 1, characterized in that the working surface of the brake pads and paste from the working surface is made with a slope of 1:20.

6. Bezgrebnevogo bimetallic brake pad for locomotive according to claim 1, characterized in that the area T of the working surface of the pad without inserts are calculated according to the formula:

T=(5,6÷7,2)·t,

where T is the surface area;

t - the amount of the working surfaces of the inserts.

7. Bezgrebnevogo bimetallic brake pad for locomotive according to claim 1, wherein d is the diameter of the cylindrical insert is found by the formula:

d=(0,18÷0,30) on; In,

where d is the diameter of the cylindrical insert;

In - the width of the working surface of the pad.

8. Bezgrebnevogo bimetallic brake pad for locomotive according to claim 1, characterized in that the distance between the centers of the cylindrical inserts in the group is found by the formula:

C=(0,10÷0,12)·L,

where C is the distance between the centers of the cylindrical inserts in the group;

L is the length of the pad.

9. Bezgrebnevogo bimetallic brake pad for locomotive according to claim 1, characterized in that the length of the cylindrical insert And is found by the formula:

A=(0,91÷0,93)·N,

where a is the length of the cylindrical insert;

H - the thickness of the pads without the thickness of the steel plate.

10. Bezgrebnevogo bimetallic brake pad for locomotive according to claim 1, characterized in that all of the cylindrical insert from the side of the working surface of the pad when casting iron beams pour 2÷3-mm layer of iron.

11. Bezgrebnevogo bimetallic brake pad for locomotive according to claim 1, characterized in that the abrasive material of the inserts is greater than the abrasiveness of the material body pads.

12. Bezgrebnevogo bimetallic brake pad for locomotive according to claim 1, characterized in that the steel insert is fixed on the plate of the steel frame by spot welding.



 

Same patents:

FIELD: railway transport; brakes of rolling stock.

SUBSTANCE: proposed bimetallic brake shoe contains cast iron bar made by molding and steel plate from which steel cylindrical inserts pass into cast iron bar which are arranged in two parallel rows. Inserts are made of material whose abrasiveness is higher than material of bar. Steel plate is placed longitudinally under boss and it covers entire surface of rear side of cast iron bar. It contains middle profiled section enclosing cross boss. Extreme cylindrical inserts in rows are provided with ring grooves on side surface. Diameter d of each cylindrical insert is found from formula d=(0.16-0.32) x B where d is diameter of cylindrical insert; B is width of working surface of shoe, and T-areas of working surface of shoe without inserts is calculated by formula T=(5.0-9.2) x t where T is area of working surface; t is sum of working surfaces of inserts.

EFFECT: improved operating characteristics of shoe, increased balanced service life, reliability, efficiency, increased service life of wheels of rolling stock owing to reduction of their wear caused by brake bimetallic shoes.

10 cl, 4 dwg

The invention relates to mechanical engineering and can be used in the chamber brakes in the automotive industry

The invention relates to a transport machine building, and is intended for drum-type brakes

FIELD: railway transport; brakes of rolling stock.

SUBSTANCE: proposed bimetallic brake shoe contains cast iron bar made by molding and steel plate from which steel cylindrical inserts pass into cast iron bar which are arranged in two parallel rows. Inserts are made of material whose abrasiveness is higher than material of bar. Steel plate is placed longitudinally under boss and it covers entire surface of rear side of cast iron bar. It contains middle profiled section enclosing cross boss. Extreme cylindrical inserts in rows are provided with ring grooves on side surface. Diameter d of each cylindrical insert is found from formula d=(0.16-0.32) x B where d is diameter of cylindrical insert; B is width of working surface of shoe, and T-areas of working surface of shoe without inserts is calculated by formula T=(5.0-9.2) x t where T is area of working surface; t is sum of working surfaces of inserts.

EFFECT: improved operating characteristics of shoe, increased balanced service life, reliability, efficiency, increased service life of wheels of rolling stock owing to reduction of their wear caused by brake bimetallic shoes.

10 cl, 4 dwg

FIELD: railway transport.

SUBSTANCE: invention relates to combinations of automatic brakes of different type vehicles. Proposed automatic parking brake has housing of brake cylinder with guide, unit and lock of parking brake, accumulating spring, air distributor (according to first design version). Lock is made in form of spring loaded rod-piston installed in unit and forming rod space with the unit. Rod space communicates with brake main line through charge-discharge channel which includes check valve with calibrated hole and additional reservoir arranged before unit. Unit is installed on brake cylinder housing. Rod of brake cylinder is furnished with stop. At discharge of brake main line, spring-loaded rod-piston can into power contact by its end face with said stop. According to second design version, variable volume pneumatic reservoir made of flexible hermetic material is placed into rod space of unit installed on brake cylinder housing.

EFFECT: automatic change over of emergency braking mode into parking mode after stopping of vehicle and provision of release of car parking brake at connection to brake main line of locomotive.

4 cl, 5 dwg

FIELD: railway transport.

SUBSTANCE: invention relates to reduction ("softness") devices of vehicle brake air distributors. Proposed reduction device of brake air distributor has movable partition rigidly connected by rod with valve separating channels of spool and main line chambers of air distributor. Pressure equalizing chamber is arranged over partition. Partition is made to provide closing of channel of main line chamber by valve of rod under action of pressure build in pressure equalizing chamber at standard braking conditions. Displacement of partition, when valve is open, is limited by stop arranged at distance sufficient to communicate spool and main line chambers. Step is made form of limiting ring.

EFFECT: improved operation of brakes owing to opening of reduction valve at small pressures and simplified design of said device.

1 dwg

FIELD: railway transport; brake shoes of rail vehicles.

SUBSTANCE: proposed brake shoe has metal skeleton-back with hole for cotter in central projection of shoe. Skeleton-back is made in plan in form of rectangle with side walls over entire length of shoe and with at least two bridges. Said bridges connect side walls being arranged symmetrically at both sides relative to central projection of shoe. Bridges are provided with fixing grooves for composite friction member arranged inside skeleton-back.

EFFECT: increased braking efficiency of shoe if water or ice get in friction zone, improved reliability of design of shoe in operation in cold climate and at frequent application of brakes.

3 cl, 1 dwg

FIELD: railway transport; brake systems.

SUBSTANCE: method comes to isolation of control devices by means of disconnecting components in left control station and connecting with proper main lines in control station set into operation. Special units are installed in each control station including three-way locking units equipment with pneumatic latches and electric contactor elements to which corresponding taps of control devices and main lines are connected. Provision is made in left control station for reduction of adequate tap of driver's brake valve and simultaneous isolation of auxiliary brake valve from like main line by adequate of three-way locking unit by means of switch-handle. Clearing of control devices in control station set into operation is effected by discrete setting of three-way locking unit to isolate similar tap of driver's brake valve and communicating simultaneously auxiliary brake with like main line. Input unions of three-way locking units are connected with taps of driver's brake valve connected with supply main line. Opposite input unions of three-way locking units are connected with main line of auxiliary brake. Output unions of three-way locking units are connected with output taps of auxiliary brake valve.

EFFECT: provision of adequate locking of brakes and possibility of reduction of branch of driver's brake valve by means of standard three-way locking unit.

3 dwg

FIELD: mechanical engineering, namely, bushings with sliding working surface, for lever braking system of rail transport, for example, passenger and cargo, including tube railway cars.

SUBSTANCE: bushing of lever braking system of rail transport is made two-layered of polymer composite material, and consists of internal working sliding layer and external damping layer. Internal sliding layer is made of polymer anti-friction composite material, containing a mixture of poly-oxy-diasol and cotton fiber as fibrous filler. As power filler - silicon oxide in form of marshalite or colloid silica. As adhesive - polyvinyl-acetate and/or polyvinyl-butyrale. As anti-adhesive - zinc stearate and/or calcium stearate, and as binding agent - phenol-formaldehyde or cresol-formaldehyde resin in novolak and/or resol form. External damping layer is made of polymer anti-friction composite material, containing cotton fiber as fibrous filler. As powder filler - nitrile rubber. As adhesive - polyvinyl acetate and/or polyvinyl butyrale, as anti-adhesive - zinc stearate and/or calcium stearate, and also as binding agent - phenol-formaldehyde or cresol-formaldehyde reson in novolak and/or resol form.

EFFECT: increased lifetime of bushing due to decreased total wear of steel in friction couple, decreased intensiveness of linear wear, increased strength limit during compression and increased impact toughness while preserving resistance to segregation.

7 cl, 3 tbl

Passenger car brake // 2298501

FIELD: railway transport; brake systems of rail vehicles.

SUBSTANCE: proposed brake includes brake main line and feed main line, air distributor, brake cylinders with drives to brake linings and supply pipelines, antiskid valves and brake disks. Brake disks are rigidly secured on axles of wheelsets. Four pneumoelectric pressure converters with cables are connected to supply pipelines of brake cylinders. Said cables connect pneumoelectric pressure converters with microprocessor monitoring and diagnostic control system complex installed inside car. Indicator panels displaying information of condition of brake are installed in service vestibule and conductor compartment.

EFFECT: increased sensitivity of control of compressed air pressure in cylinders, safety of operation of cars, possibility of excluding additional volume of brake cylinders.

2 cl, 1 dwg

FIELD: railway transport; brake shoes of rolling stock.

SUBSTANCE: proposed bimetallic brake shoe includes arch-shaped cast iron bar with boss for wedge-like lock pin for fastening in shoe holder. Cylindrical inserts made of material of higher abrasiveness than material of bar are arranged in longitudinal rows in body of cast iron bar. Inserts are attached to steel frame located on rear part of bar by sport welding. Inserts are arranged in two groups. Inserts within each group are arranged in two parallel rows. Extreme cylindrical inserts in rows are provided with ring grooves on side surface. Groups of inserts are separated by section without inserts P. Steel frame has shaped section enclosing boss of cast iron bar, with holes in side surface at level of hole in boss, for fixing shoe wedge-like lock pin.

EFFECT: increased balanced service life, improved reliability, efficiency, provision of ease of servicing of shoes, increased service life of wheels owing to reduced wear causing by bimetallic shoes, improved quality of shoes.

15 cl ,5 dwg

FIELD: railway transport; brake shoes of rolling stock.

SUBSTANCE: proposed brake shoe contains metal wire frame with backing and with hole for cotter in central projection of shoe, and friction part with hard inserts. Insert made of metal in form of rectangle in longitudinal section with side walls over entire length of shoe and with, at least, two bridges from each side from central projection of shoe. Bridges contain fixing cavities for frame fittings, and composite friction element is arranged inside insert. Invention provides increase of braking efficiency of shoe if water or ice gets into friction zone, improves reliability of design of shoes operating in cold climate and frequent application of brakes.

EFFECT: increased service life of wheels.

3 cl, 5 dwg

Rail vehicle brake // 2297560

FIELD: railway transport; car brake systems.

SUBSTANCE: proposed brake has brake main line connected with air distributor, master brake cylinder and additional cylinder by means of disconnected cock. Rod of additional cylinder is installed for translational moving in slot of shackle hinge mounted on bellcranks of master brake cylinder. Disconnecting cock control handle is provided with lever hinge-coupled with rod of lock installed for movement in guide rigidly connected with housing of additional cylinder. Groove made on rod of additional cylinder engages with said rod of lock when disconnecting cock handle is set in overlapping position.

EFFECT: improved efficiency of brake owing to enlarged functional capabilities.

2 dwg

FIELD: railway transport.

SUBSTANCE: proposed mechanical lock of brake cylinder rod contains brake cylinder rod with cylindrical insert with wedge-like cutout in zone where insert engages with pressure strips to prevent slipping of brake cylinder rod I fixed position. Stop clamping device is made in from of two clamps of self-braking multistep drives-motion converters to prevent separation of clamp under action of elastic forces of brake leverage and release spring of piston of brake cylinder in fixed position. To realize maximum possible force of clamps, their longitudinal axes are arranged square to spaces of wedge-like cutouts of insert and at acute angle to longitudinal axis of rod. Pneumatic drive is made in from of two individual double-acting pneumatic cylinders with possibility of use of air from main line of brake cylinder at braking for additional, drive apart from cylinder spring to provide clamp of rod of brake cylinder in brake-applied position and it is designed for fitting mechanical lock of brake cylinder rod onto brake cylinders of any type cars and locomotives.

EFFECT: improved fixing of brake cylinder rod.

1 dwg

FIELD: railway transport.

SUBSTANCE: proposed mechanical lock of brake cylinder rod contains brake cylinder rod with cylindrical insert with wedge-like cutout in zone where insert engages with pressure strips to prevent slipping of brake cylinder rod I fixed position. Stop clamping device is made in from of two clamps of self-braking multistep drives-motion converters to prevent separation of clamp under action of elastic forces of brake leverage and release spring of piston of brake cylinder in fixed position. To realize maximum possible force of clamps, their longitudinal axes are arranged square to spaces of wedge-like cutouts of insert and at acute angle to longitudinal axis of rod. Pneumatic drive is made in from of two individual double-acting pneumatic cylinders with possibility of use of air from main line of brake cylinder at braking for additional, drive apart from cylinder spring to provide clamp of rod of brake cylinder in brake-applied position and it is designed for fitting mechanical lock of brake cylinder rod onto brake cylinders of any type cars and locomotives.

EFFECT: improved fixing of brake cylinder rod.

1 dwg

FIELD: railway transport.

SUBSTANCE: invention relates to brake systems of railway traction vehicles, mainly, locomotives, motor cars and special self-propelled trains with more than one control posts. Possibility of control of railway vehicle brakes is defined by main procedure at which driver's valves are disconnected and connected to brake main line at inoperative and operating control posts, respectively. If necessary, additional operations are carried out, i.e. auxiliary brake valves are disconnected and connected with main line of brake cylinders in similar manner. These procedures provide possibility of switching on traction. Forced execution of said main procedure is provided for which purpose atmospheric cocks are installed by means of which main line taps of driver's valves are connected to and disconnected from atmosphere from inoperative and operating control posts. Charging of brake main line provides possibility of switching on traction only from operating control post which is provided by checking position of plug of atmospheric cock. If said additional procedure is to be executed, it is carried out together with carrying out of main procedure.

EFFECT: prevention of narrowing of channels to pass compressed air, provision of possibility of creation of traction only when brake main line is charged.

3 dwg

FIELD: railway transport.

SUBSTANCE: invention relates to brake systems of freight cars, namely, to design of brake riggings installed on bogies to transmit force of brake cylinder to brake shoes interacting with wheels. Proposed brake rigging includes vertical levers. Upper part of one of levers is connected with tie-rod of car brake system, and upper part of other lever, with shackle of dead point holder. Lower parts of vertical levers are connected by brace, and in middle parts brake beams are hinge secured being suspended through swinging suspension from brackets of side frames and connected by elastic rod installed parallel to longitudinal axis of bogie. One end of said elastic rod is secured in guide of first brake beam, and other end is mounted in guide of second brake beam for reciprocation. Novelty is that proposed brake rigging is furnished with second elastic rod connecting brake beams in mirror like manner, each elastic rod being provided with limiting head on one end and secured from side of one of brake beams by means of clamp with two coaxial holes feted on elastic rod and arranged inside guide. Bent-on wall of clamp encloses one of webs of brake beam guide and rod head. Elastic rods are installed in parallel on end parts of brake beams between brake shoe and spacer. One rod is secured in guide of first brake beam, and the other, in guide of second brake beam.

EFFECT: provision of parallel release of brake shoes from wheel roll surface at preservation of simple design.

3 dwg

FIELD: railway transport.

SUBSTANCE: invention relates to brake systems of freight cars, namely, to design of brake riggings installed on bogies to transmit force of brake cylinder to brake shoes interacting with wheels. Proposed brake rigging includes vertical levers. Upper part of one of levers is connected with tie-rod of car brake system, and upper part of other lever, with shackle of dead point holder. Lower parts of vertical levers are connected by brace, and in middle parts brake beams are hinge secured being suspended through swinging suspension from brackets of side frames and connected by elastic rod installed parallel to longitudinal axis of bogie. One end of said elastic rod is secured in guide of first brake beam, and other end is mounted in guide of second brake beam for reciprocation. Novelty is that proposed brake rigging is furnished with second elastic rod connecting brake beams in mirror like manner, each elastic rod being provided with limiting head on one end and secured from side of one of brake beams by means of clamp with two coaxial holes feted on elastic rod and arranged inside guide. Bent-on wall of clamp encloses one of webs of brake beam guide and rod head. Elastic rods are installed in parallel on end parts of brake beams between brake shoe and spacer. One rod is secured in guide of first brake beam, and the other, in guide of second brake beam.

EFFECT: provision of parallel release of brake shoes from wheel roll surface at preservation of simple design.

3 dwg

FIELD: railway transport.

SUBSTANCE: proposed pneumatic system of automatic brake equipment contains air distributor, spare reservoir, two subsystems "automatic mode-brake cylinder" for each cantilever part of vehicle. Each subsystem provides independent transmission of brake forces to actuating mechanism of bogie of each cantilever part in proportion to its load. Invention improves efficiency of braking of vehicles carrying loads with displaced center of gravity relative to longitudinal axis of vehicle and provides stable brake characteristics and operation reliability.

EFFECT: enlarged operating capabilities.

1 dwg

FIELD: railway transport.

SUBSTANCE: proposed pneumatic system of automatic brake equipment contains air distributor, spare reservoir, two subsystems "automatic mode-brake cylinder" for each cantilever part of vehicle. Each subsystem provides independent transmission of brake forces to actuating mechanism of bogie of each cantilever part in proportion to its load. Invention improves efficiency of braking of vehicles carrying loads with displaced center of gravity relative to longitudinal axis of vehicle and provides stable brake characteristics and operation reliability.

EFFECT: enlarged operating capabilities.

1 dwg

Brake beam // 2254254

FIELD: railway transport; rail vehicle brake leverage.

SUBSTANCE: proposed brake beam contains bar with string divided in middle part by brace and connected at ends by means of force transmitting unit consisting of series-mounted thrust yoke, insert, brake holder with shoe and end piece held from longitudinal displacement by means of device with flexible member. Said member is made in form of cylinder arranged between thrust surface of end piece and wedge ring whose inner surface is made in form of truncated cone engaging with outer surfaces of locks getting into conical slot made on end cylindrical surface of string.

EFFECT: provision of reliable fixing of brake holder against longitudinal displacement, possibility of easy disassembling of said unit.

3 cl, 5 dwg

Up!