Hydraulic control circuit for a variator

• Main Author: FULLER JOHN WILLIAM EDWARD,GREENWOOD CHRISTOPHER JOHN
• Format: Patent
• Language: Chinese; English
• Published: 01.09.2004
• Edition: 7
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

公开了一种变速器组件，其包括：具有输入和输出圆盘的环形轨道滚动牵引式变速器；由液压辊控制致动器所作用的辊，其位于圆盘之间以将扭矩从一个圆盘传递到另一圆盘；以及液压端部加载装置(200)，其被供应有处于端部荷载压力下的流体以施加端部荷载，以将圆盘和辊相互朝向地偏压，从而实现扭矩传递。组件还包括反作用压力提供装置，其与辊控制致动器相连以使它们可对辊施加可调节的反作用力。根据本发明，设置了液压控制的阀装置(204)以响应于反作用压力和端部荷载压力来控制端部荷载压力，从而在端部荷载和反作用压力之间保持一定的关系。还设有用于调节端部荷载和反作用压力之间的关系的另一调节装置(350)。 A variator assembly comprising a variator of the toroidal-race rolling-traction type. The assembly has input and output discs and rollers which are acted on by hydraulic roller control actuators. They are positioned between the discs to transmit torque from one disc to the other. Hydraulic end loading means supplied with fluid at an end load pressure to apply an end load to bias the discs and the rollers toward each other, thereby enabling the transmission of torque. Reaction pressure supply means are connected to the roller control actuators to cause them to apply an adjustable reaction force to the rollers. The assembly also has hydraulically influenced valve means which serve to compare an input related to the end load pressure with an input related to the reaction pressure and to control the end load pressure in dependence upon the comparison, thereby maintaining a relationship between the end load and reaction pressures. Adjustment means are provided to adjust the relationship between the end load and reaction pressures.