Friction products

 

(57) Abstract:

The invention relates to the field of engineering, namely for friction products, designed for operation in different friction mechanisms. Friction product contains a composite friction element, the friction surface is made of a groove depth varying along the length of the groove. Moreover, the depth of the grooves increases from the inner circumference of the ring element to the outer perimeter. Effect: improved stability of frictional characteristics as wear items. 2 Il.

The invention relates to the field of engineering, namely for friction products, such as friction linings, pads, etc. used in various friction nodes, such as nodes clutch, brake nodes drum and disc type cars and trucks, equipment and so on, and having on the friction surfaces of the recesses (grooves).

Analogous to the claimed invention is a friction product containing a composition friction element, the friction surface is made of grooves (see Friction and sealing products and materials. The catalogue. M , Createnewfile which made grooves coincide with the essential features of the claimed invention.

The disadvantage of analogue is the lack of stability of the performance of this product due to the abrupt change in frictional characteristics (coefficient of friction) at the time of wear to the bottom of the grooves as a result of sharp increase of the coefficient of mutual overlap of the friction pair.

Another analogue of the claimed invention is a friction product (plate clutch) containing a composition friction element, the friction surface is made of a groove-type square (see C. M. Sharipov, etc. Increase efficiency friction couplings due to the forced liquid cooling of the friction pairs. In: "proceedings of the 4th International Symposium on tribology friction materials Aromi-2000". Yaroslavl, JSC NIYATI firm tier"; 2000, S. 74-79). The essential features of the analogue composite friction element, the friction surface of which is made grooves coincide with the essential features of the claimed invention.

The lack of similar also is the lack of stability of the frictional characteristics of the product due to the abrupt change in frictional characteristics (coefficient of friction) in the municipalities of the ion pair.

The prototype of the claimed invention is a friction product containing a composition friction element, the friction surface is made of radial grooves (see U.S. patent 4726455, IPC7F 16 D 69/00, 1988). The essential features of prototype composite friction element, the friction surface of which is made grooves coincide with the essential features of the claimed invention.

The disadvantage of the prototype is also lack of stability of the frictional characteristics of the product due to the abrupt change in frictional characteristics (coefficient of friction) at the time of wear to the bottom of the grooves as a result of sharp increase of the coefficient of mutual overlap of the friction pair.

The task, which is aimed by the invention, is to increase the stability of the frictional characteristics of the product by reducing the possibility of abrupt change in frictional characteristics as wear by reducing the possibility of a sharp increase of the coefficient of mutual overlap.

To achieve the technical result in friction product containing a composition Frick along the length of the groove. The essential features of the claimed invention "of the groove at a depth varying along the length of the grooves are different from the characteristics of the prototype.

Friction piece includes an element made of a composite material, for example polymer composite, metal, etc. On the friction surface of the friction element is made grooves, usually placed within the working thickness of the friction element (i.e., thickness, wear in operation until the regular replacement friction products) and having a depth varying along the length of the groove. Typically used grooves, evenly allowing you to modify the coefficient of mutual overlap, but in some cases it is advisable to use the grooves with non-uniformly varying depth (for example, when it is necessary to compensate the effect of external factors due to more rapid change coefficient in certain periods of operation of the product).

Be manufactured friction products may known methods, for example the winding of threads with subsequent impregnation (coating) of the polymer composition and the forming or molding of the resin composition, heat treatment, machining etc., While ka is some processing).

In Fig.1 shows a specific example of the invention. In Fig.2 is a cross - section of the product along the length of the groove. A concrete example is the lining of the clutch of the car VAZ-2110, made of polymer friction composite with a matrix of a vulcanizate of the rubber and Resita resin reinforced powder filling, and is wrapped around the frame of the combined non-asbestos fibres, for example glass-based glass roving, glass, wire, etc. On the surface of the friction lining is made at an angle to the radial direction of the groove 1, the depth of which increases uniformly from the inner circumference 2 rings to the outer rings 3. The result is not only a uniform increase of the coefficient of mutual overlap of the friction pair as wear pads, but also to reduce the centrifugal force due to the reduction of weight plates on the maximum radius of rotation, which improves the durability of the lining to the separation.

Manufacture of friction products with grooves on the friction surface, variable depth, reduces the possibility of sudden sharp changes in the friction characteristics of the product as it is wear and tear during operation, and allows the wok excluded sudden sharp increase of the coefficient of mutual overlap for the wear and tear to the bottom of the grooves.

Friction product containing a composition friction element, the friction surface is made of a groove with a depth varying along the length of the groove, characterized in that the depth of the grooves increases from the inner circumference of the ring element to the outer perimeter.

 

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FIELD: mechanical engineering.

SUBSTANCE: friction article is made of a polymeric friction composite reinforced with fibers. The diameter of openings for rivets is larger than that of the reinforcing fibers by a factor of 2-8.

EFFECT: enhanced reliability.

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