| 摘要 |
FIELD: agricultural engineering, in particular, equipment used in grain combines. ^ SUBSTANCE: hydraulic system has tank, independent steering control system, basic control system and hydraulic drives for working tools. Distributor of hydraulic drive for lifting-lowering mechanism of header part is the furthest in distributor block of hydraulic drive control system. Drain cavity of distributor of hydraulic drive control system of header part lifting-lowering mechanism is communicated through drain cavity of cover with tank via pipeline of one hydraulic line equipped with back valve through drain main pipelines of independent system, and via pipeline of second hydraulic line through adjustable lock valve and pipelines of drain main of basic system. Drain cavities of other distributors are connected to basic control system through drain cavity of other cover and pipeline of additional hydraulic line. ^ EFFECT: enhanced reliability in operation of combine working tools and functioning of hydraulic drive of header part lifting and lowering mechanism upon replacement of header part. ^ 4 cl, 8 dwg |
