Patent EA-012014-B1 (EA)
Title: A brake block for high-speed locomotive and gasoline locomotive railway rolling stock
Inventor: TEMNIKOV FEDOR SERAFIMOVICH
IPC: B61H7/02
Filed: 2008-01-22
Abstract: The invention relates to rail transport, particularly to brake equipment of traction rolling stock, and also can be used in other modes of transport in brake systems. A construction of a brake block for high-speed locomotive and gasoline locomotive railway rolling stock contains a steel plate, a cast-iron arched body with a brook made in it. Said body consists of the main and profile parts and provided with friction elements. The friction elements are put in the body of the main part of the block from the side of a friction surface and in the body of the profile part in the brook of the block. The friction elements are more abrasive than the body of the block. The body of the block has a lug with an aperture for a wedge chock from the back side. The main part of the arched body of the block represents a carcass with chambers which can be divided by the partitions into the cells wherein the friction elements are placed. The chambers or the cells and the appropriate inserts represent the truncated pyramids or the cones with their smaller base turned towards the friction surface of the block and with the walls inclined at the angle α=10°-15° to form a fixed dovetail joint. From each side in the lateral walls of the carcass there are two openings opposite the chambers. At the back side the main part of the arched body of the block has at the ends the T-shaped thrust register ledges. The steel plate covering the back side of the main part represents a plate-like section spring with the ledges fitted under the shoe points of bearing and rests against the thrust ledges. There is a corrugated fluoroplastic heat-resistant lining arranged between the plate-like section spring and the body of the block. The plate-like section spring and the fluoroplastic lining are furnished with cuts made opposite the thrust register ledges of the main part of the body of the block and the apertures in the lug. In the lateral wall of the brook of the profile part there are cavities represented the truncated pyramids with their smaller base turned towards the friction surface of the block and with the walls of the cavities inclined at the angle α=10°-15° with the base in the form of a quadrangle. The appropriate friction elements are placed into the cavities to form the fixed dovetail join. The chambers or the cells and the appropriate friction elements have a form selected from: the truncated cone with the base in the form of a circle or an ellipse; the truncated pyramid with 3-6 lateral walls with the base in the form of a triangle, a quadrangle, a pentagon and a hexagon. The friction elements are laid into a casting mold and are poured by liquid metal. The carcass of the block, the partitions are made prefabricated and welded, the composite filler is put into the obtained cavities, chambers and cells. The filler is moulded and cemented getting the friction elements solidly placed in the body of the block. The carcass of the block, the partitions are made prefabricated and welded, the filler becoming firm because of a chemical reaction is put into the obtained cavities, chambers and cells getting the friction elements. The brake block is made from materials working at a temperature to 1000°C. The total area of the friction surface of the friction elements is 85-95% from the whole working surface of the main part of the block. The friction elements of the main part of the block at the side surface have the ledges corresponding to the openings in the lateral walls of the carcass. The construction of the proposed block provides elastic hanging the block in the block shoe, smooth interaction between the block and the conjugate working surface of the wheel, that improves its operating ability. Vibrations causing destruction of the body of the block and the friction elements are eliminated, that provides high reliability of the brakes, and noise when using the brakes is decreased. The construction provides reliability of fastening the friction elements in the body of the block because the dovetail joint and the friction elements in the form of the truncated cones and the pyramids with their smaller base turned towards the block working surface are used. That also increases reliability of functioning the brakes, because the area of the friction elements is increased against the whole working surface of the block while abrading the brakes.