A friction plate for a fluid-viscous clutch and a processing method thereof

Abstract

The invention discloses a friction plate used for a liquid-viscosity variable-speed clutch and a processing method for the friction plate. An oil slot with certain shape is processed in the surface of the friction plate; oil passing capacity at different radiuses is changed by changing the structural dimension of the oil slot, so that oil passing capacity at relatively small radiuses is greater than that at relatively great radiuses, and therefore, an oil film coverage rate of the friction plate is increased; the angle of an oil slot region is reduced along with increase of the radiuses, i.e., the angle of the oil slot at the smallest inner diameter is biggest, and the angle of the oil slot at the biggest outer diameter is smallest; depth of the oil slot is gradually reduced along with increase of the radiuses, i.e., the depth of the oil slot at the smallest inner diameter is biggest, and the depth of the oil slot at the biggest outer diameter is smallest. The friction plate considers radial changes of radial speed of oil liquid in the friction plate, and difference of two different concepts Qinlet=Q and FORMULA as shown in the specification is distinguished in a flow filed analysis process of the friction plate; and oil passing capacity at different radiuses of the friction plate is changed through various ways, so that all oil film coverage of a gap of the friction plate is realized, and errors between a practical transmitting torque and a theoretical transmitting torque are reduced.

Description

technical field [0001] The invention relates to a friction plate, which is especially suitable for a liquid viscous speed regulating clutch. Background technique [0002] The structure of the friction plate directly affects the overall performance of the hydraulic clutch. In order to enhance the oil passing capacity, ensure that there is enough oil to take away the heat and remove wear debris, the surface of the friction plate is usually processed with a certain form of oil groove. In the traditional method of designing the oil groove of the friction plate of the hydraulic viscous clutch, there is no definite standard or calculation formula for the depth of the oil groove, and there is only a range of 0.5-0.6mm. So far, the patents related to the friction plate of the liquid viscous speed regulating clutch mainly include: CN102401018A discloses a design method for the friction pair of the liquid viscous speed regulating clutch; Novel friction disc set for fluid-viscous spee...

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Problems solved by technology

[0003] Aiming at the problems in the prior art that the oil film coverage at the outer diameter of the friction plate is reduced and the effective area of ​​torque transmission is reduced, the present invention provides a friction plate for a fluid-viscous speed regulating clutch and a processing method thereof. Under a certain premise, change the structural parameters of the oil groove along the radial direction, so that the oil passing capacity of the inner ring is greater than the oil passing capacity of the outer ring, which theoretically solves the problem that the coverage of the oil groove is lower than 100%, and increases the effective area of ​​the oil film between the friction plates , thus increasing the transmitted torque and reducing the difference between the theoretically transmitted torque and the actual transmitted torque

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