Rolling stock brake block

FIELD: machine building.

SUBSTANCE: brake block contains a polymer friction composite material with U-shaped transverse recess made on its working surface. The polymer friction composite material is fixed on a metal frame with U-shaped ledge in its central part. The said composite material incorporates an additional polymer friction element containing 40 to 96% of metal chips pressed in along the perimeter of the U-shaped recess on the working surface.

EFFECT: greater distance run between overhauls of the wheel pair.

2 dwg

 

The invention relates to railway transport, in particular to the manufacture of brake pads for railway vehicles.

The analogue of the claimed invention is a rail brake pad containing polymer friction composite made from the working surface of the transverse U-shaped grooves, secured on a metal frame with a U-shaped ledge in the Central part, made in the form of Telnice (Cm. Technological regulations TR-138-90 "Production of composite brake blocks for railway cars from the composition of the cipher 8-1-66", Ural plant of asbestos technical products, 1990, p. 1, 4, 6, 7). The essential features of similar

"polymer friction composite made from the working surface of the transverse U-shaped grooves, secured on a metal frame with a U-shaped ledge in the Central part, made in the form of Telnice"match the essential features of the claimed invention.

The Shoe has a high vibration resistance due to the mesh-wire frame and the elasticity of the material of the friction material. However, the presence in the friction material of barite concentrate and carbon technical cause of its low thermal conductivity and, as a consequence, low wear is stoikosti and increased damage to the wheelset.

The prototype of the claimed invention is a rail brake pad comprising a polymeric friction composite made from the working surface of the U-shaped recess, secured on a metal frame with a U-shaped ledge in cantarini part, made in the form of Telnice, and cast iron insert in polymer friction composite (See. the US patent No. 6241058, IPC F16D 65/04, 2001).

The essential features of the prototype polymeric friction composite made from the working surface of the U-shaped recess, secured on a metal frame with a U-shaped ledge in the Central part, made in the form of Telnice" match the essential features of the claimed invention.

The disadvantage of the prototype is the complexity of the design due to the necessity of fixing cast iron inserts on the metal frame, in addition to the heterogeneity of thermal and mechanical properties due to the presence of insertion is possible burnout material around the insert, crack growth, resulting in low wear and increase the damage of wheel pairs.

The task, which is aimed by the invention, is to increase turnaround wheelset by purification of the wheel from navrachana frictionless at the time of braking on its surface without compromising the basic friction characteristics, influencing the wear resistance of the friction material.

To achieve the technical result in a railway brake Shoe comprising a polymeric friction composite made from the working surface of the transverse U-shaped recess, secured on a metal frame with a U-shaped ledge in the Central part, made in the form of Telnice, in the composition of the polymer composite added polymer friction element containing 40-96% metal shavings and presovanny around the perimeter of the U-shaped recesses from the side of the working surface of the friction of the composite of any two sides of a U-shaped recess of the working surface of the friction material.

The essential features of the claimed invention "in the composition of the polymer composite added polymer friction element containing 40-96% metal shavings and presovanny around the perimeter of the U-shaped recesses from the side of the working surface of the friction of the composite of any two sides of a U-shaped recess of the working surface of the friction composites are different from the characteristics of the prototype.

Brake pad railway rolling stock (1, 2) comprises a metal frame 1 (stamped from metal or wire frames, and PE is paribanou metal strip or other type) and friction polymer composite 2, made on the basis of a polymeric binder with various fillers, including fiber. In addition to the polymeric friction composite introduced an additional polymer friction element 3, made of polymer composite based on a polymeric binder with various fillers, including 40-96% metal shavings (iron, brass and so on), and presovanny in friction polymer composite. The additional width of the friction element can vary without affecting the basic friction properties, as it has the same frictional properties, and friction polymer composite.

Be made of the inventive pad may known methods, for example by molding from polymeric compositions. In cold mold with special between the plates is filled with the necessary amount of additional friction element, then into the cold mold is filled with the main friction polymer composite, which separates the plates are removed from the mold and using a pressure molded into cold press-form billet rail brake pads. Next, cool the workpiece is fed into the hot mold and under pressure and temperature are manufactured brake pad railway rolling stock, ready to E. the decommission.

The presence of an additional friction element with a high content of metal shavings due to its high thermal conductivity and hardness provides quality cleaning navrachana friction composite with the working surface of the wheel and, thus, improve the operational characteristics of the pair of wheels.

Brake pad railway rolling stock containing polymer friction composite made from the working surface of the transverse U-shaped recess, secured on a metal frame with a U-shaped ledge in the Central part, made in the form of Telnice, characterized in that the polymeric friction composite advanced from its working surface is introduced polymer friction element containing 40-96% metal shavings and shrunk around the perimeter of the U-shaped recess.



 

Same patents:

The invention relates to the field of transport engineering and is intended preferably for brakes of railway transport
The invention relates to the field of rail vehicles

The invention relates to railway transport, in particular, to the design of the brake ridge locomotive pads

FIELD: automotive industry.

SUBSTANCE: spring comprises setting device that cooperates with the corresponding setting device of the support of springs and brake blocks which is made of a clamp. The interaction of the setting device of the spring and support causes their engagement and blocking thus allowing the spring to secure to the support. The spring should be secured to the support be means of one its end, the other end being free so that, before setting the friction member, this end is spaced from the support. The disk brake has at least one spring.

EFFECT: reduced sizes and enhance functional capabilities.

14 cl, 11 dwg

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The invention relates to materials used as bishopdale gaskets

FIELD: railway transport; brake systems.

SUBSTANCE: proposed brake shoe contains composite friction member, metal skeleton made of steel strip and hard insert welded to skeleton and arranged in central part of shoe, wire framing, central boss and two side bosses. Wire framing consists essentially of two closed frames press-fitted into composite friction material from rear side of shoe over perimeter of shoe, whose inner parts are relatively overlapped and bent outwards relative to rear part of shoe, thus forming eye to pass cotter pin. Central boss is provided with hole for cotter, pin. Two side bosses are made of composite friction material. Metal skeleton made of steel strip has width less than width of wire framing, being bent to radius of rear surface of shoe and press-fitted into rear surface of shoe between side bosses and under central boss. Composite friction member consists of two longitudinal layers of material. Strength of layer arranged from rear side of shoe is greater than that of layer arranged from working side of shoe.

EFFECT: increased strength of shoe.

2 dwg

FIELD: railway transport; vehicle brake systems.

SUBSTANCE: proposed brake shoe contains metal skeleton and composite polymeric friction member secured on skeleton. Composite polymeric friction member is manufacture of material containing fiber-like steel particles. Material of friction member contains additionally iron powder and iron ore concentrate in form of powder. Total content of iron containing components is 40-70% of mass.

EFFECT: improved operating characteristics of shoe, increased service life of wheels.

1 dwg

FIELD: railway transport; rail vehicle brake systems.

SUBSTANCE: proposed brake shoe contains friction composite member and metal skeleton with U-shaped projection in central part with two side bosses. Skeleton consists of two parts, one being bent to radius of holder of main strip with two side bosses, and central boss in form of u-shaped projection with four teeth secured on main strip by passing teeth through holes in main strip and bending teeth from inner side of skeleton at cold stamping.

EFFECT: reduced consumption of metal, weight of brake shoe, simplified manufacture of shoe.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to railway transportation, particularly to train brake blocks. The brake block contains a metal carcass representing a basic band with a П-shape ledge in its central part, two side bosses and a friction ceramic metal element. The said metal carcass is furnished with a reinforcing plate, a copper-plated steel strip equal in length and width to the said friction ceramic metal element rear side and sintered to it at pressure in the furnace. The metal carcass basic band with the said П-shape ledge in its central part is welded from outside to the said reinforcing plate on the block rear in the holes specially made to this end in the metal carcass basic band and on both end faces of the brake block.

EFFECT: higher strength and reliability of ceramic metal brake block, easier manufacturability.

1 dwg

FIELD: railway transport; brake.

SUBSTANCE: proposed brake shoe contains metal skeleton with projection in central part, composite friction member and hard insert. Shoe is furnished with two flat heat insulating elements arranged at both sides of insert between insert and friction and overlapping zone of their contact inside shoe along width and height of shoe. According to second version, shoe is furnished additionally with open slots at both sides from insert between insert and friction member, and overlapping zone of their contact inside shoe along width and height of shoe.

EFFECT: increased reliability of shoe by changing its design to increase heat resistance by preventing thermal cracks in body of friction member and its burning in place of contact with cast iron insert in manufacture and in service.

3 cl, 2 dwg

FIELD: railway transport; brakes.

SUBSTANCE: proposed brake shoe contains composite friction member, metal skeleton and hard insert. Metal skeleton consists of two parts, namely, main strip with projection in central part, and reinforcement plate welded to main strip. Hard insert is welded to reinforcement plate of metal skeleton in its central part by continuous weld in longitudinal and/or transverse direction.

EFFECT: increased strength and improved reliability of brake shoe.

1 dwg

FIELD: railway transport; brakes.

SUBSTANCE: proposed brake shoe contains metal skeleton with U-shaped projection in central part and compositive friction member and one hard insert. Hard insert is arranged in central part of shoe, being welded to metal skeleton. Hard insert is made of high strength or malleable cast iron. Ratio of area of working surface of hard insert to total area of shoe working surface if from 4% to 20%.

EFFECT: provision of cleaning and polishing action of hard insert onto wheel without impairment of operation of brake shoes at braking.

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 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

FIELD: railway transport vehicle brake shoes.

SUBSTANCE: proposed brake shoe contains polymeric friction member secured on metal skeleton being essentially perforated metal strip provided with hole for cotter and combined with closed frame. Plane of symmetry of hole for cotter asymptotically approaches plane of symmetry of shoe. Friction member is made by hot molding method from composition in which mass of rubber is 5-30% of mass of composition.

EFFECT: improved performance characteristics of brake shoe owing to higher strength indices.

1 dwg

FIELD: railway transport; vehicle brakes.

SUBSTANCE: proposed brake shoe of rail vehicle has off-axial conical working surface and cylindrical rear surface. Distance between axis of rotation of rear surface of shoe and working surface is greater than distance between axis of rotation of working surface and shoe working surface.

EFFECT: improved operating characteristic of shoe owing to reduction of possibility of cracking and breaking of edge parts of shoe in operation.

2 dwg

FIELD: railway transport; vehicle brake shoes.

SUBSTANCE: proposed brake shoe contains friction member and metal skeleton, being essentially perforated metal strip and wire frame combined with strip. Ratio of mass of metal skeleton and mass of shoe is 1:15 - 1:35, and ratio of mass of metal perforated strip and mass of wire frame is 1:1 - 1:6.

EFFECT: increased strength of shoe.

1 dwg

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