Composite brake pad railway vehicle
(57) Abstract:Usage: used in brake pads railway vehicle. The inventive composite brake pad contains net-provodka frame 1 and the friction element includes a layer 2 Associacao material, priparkovannogo to the frame 1 and containing barite concentrate and carbon technical. The friction element is provided in addition with a layer 3 of Associacao material containing oxide and graphite, preferowanym to layer 2, with a thickness greater than the thickness of the layer 2. This will increase the wear of brake pads and extend its service life to the full depreciation without breakage. 2 Il. The invention relates to a device for slowing the movement of rail vehicles and, in particular, to composite blocks of a rail vehicle.Known commercially available composite brake pad railway vehicle, consisting of a solid metal frame and priparkovannogo to him of the friction element is made of Associacao material containing oxide, and graphite 
The closest in technical essence to the invention is brake pad containing mesh-wire frame with preferowanym to him frictional element 
The problem solved by this invention is to increase the reliability of the brake pads by increasing its wear resistance at high vibration strength.The essential features that characterize the invention, are:
a) in common with the prototype mesh-wire frame, a friction element, reformovanii to the frame;
b) distinctive features of the prototype of the friction element includes a layer Associacao material containing carbon black and barite concentrate and equipped with an additional layer of Associacao material containing oxide and graphite. This layer preferowan to the first layer, and its thickness greater than the thickness of the first layer.Creatures of the railway vehicle, in Fig. 2 General view of the mentioned brake pads in axonometry.Composite brake pad rail vehicle consists of a mesh-wire frame 1, priparkovannogo to it a layer 2 of Associacao material containing barite concentrate and carbon technical, layer 3 of Associacao material containing oxide and graphite. 3 layer material preferowan to the layer 2. The thickness of the layer 3 of material is approximately 2/3 of the thickness of the friction element, i.e. greater than the thickness of the layer 2. This is necessary because the layer 3 is the main working element pads, interacting with the surface of the wheel.The production of the composite brake pads by means of pressing in the mold. For this, the mold is formed by a layer 3 of Associacao material containing oxide and graphite, which is filled approximately 2/3 of the mold, and then create a layer 2 of Associacao material containing barite concentrate and carbon technical, which is filled approximately 1/3 of the mold, then placed mesh workpiece with a wire armature, forming a mesh-wire frame 1, and proizvoditelyami design has as high vibration strength and increased wear resistance and low damage wheelset wheelset, i.e. it combines previously incompatible dignity. This is achieved due to the fact that the layer 2 Associacao material containing barite concentrate and carbon technical, having elasticity, became a link between the mesh-wire frame, providing a high vibration resistance, and a layer 3 of Associacao material containing oxide and graphite, providing due to good thermal conductivity, high wear resistance. Without the intermediate layer 2 reliable connection of the frame 1 with the material constituting the layer 3, it is impossible due to the lack of elasticity of the latter.Sources of information:
1. The technological regulations of mastering the production of composite brake blocks for railway transport of material 328-303", all-Union scientific research and design-technological Institute of the asbestos technical products. 1977 page 1, 2, 3, 4.2. Auth. mon. USSR N 518403, B 61, H 7/02, 1975 Composite brake pad railway vehicle containing mesh-wire frame and friction to the frame, containing carbon black and barite concentrate, and an additional layer Associacao material containing oxide and graphite, reformovanii to the first layer, the thickness of the additional layer is greater than the thickness of the first layer.
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.
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.
FIELD: railway transport; vehicle brake shoes.
SUBSTANCE: proposed brake shoe contains friction member made by hot mounding method from composition containing polybutadiene rubber, curing group, powder fillers and fiber. Friction member is made with ratio of fiber and power fillers in composition being 1:1 - 1:20.
EFFECT: increased strength of shoe owing to increased strength of friction member by choosing optimum ratio of fiber and powder fillers.
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.
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; 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; 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.
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.
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
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.