SU971150A1 - Grain harvester hydraulic system - Google Patents

Description

(5) GRAIN-HANDHOOD COMBINE HYDROSYSTEM

The invention relates to the field of agricultural engineering, namely, to the design of combine harvesters.

A hydraulic system of a combine harvester is known, having an autonomous power steering system with injection and discharge lines, a main system comprising an injection and drain lines, a spool valve spool and a multi-section distributor 1.

A disadvantage of the known hydraulic system is that at the moment of the spool valve's activation, the hydraulic system of the main system cannot operate in an emergency, as well as its high intensity due to the large number of drain pipelines. one

The purpose of the invention is to ensure the independent operation of the hydraulic drives of the combine harvester in an emergency situation and the reduction of the metal intensity of the hydraulic system.

The goal is achieved by the fact that the main system is equipped with a backflow valve, and its multisection distributor is equipped with an overflow valve, the delivery line being connected to

the multisection distributor and the inlet of the relief valve, and the drain line of the relief valve through the spool valve are connected to the drain line of the main system, while the drain pipe of the multisection distributor is connected to the autonomous system and the steering valve via a check valve

10 controls

The drawing shows a schematic diagram of the proposed hydraulic combine harvester.

The hydraulic system of the harvesting unit has a common tank 1 and consists of a main and autonomous steering system.

The main system contains a power pump 2, in the injection line

Claims (1)

20 of which the safety valve 3 and the multisection distributor 4 with the relief valve 5 are connected. Consistently into the drain line b of the relief valve 5, a spool 7 of the hopper box is connected, connecting the hydraulic cylinders of the hopper 8 to the b line through the throttle bore 9. When the stem 10 of the spool 7 of the hopper 7 is removed From neutral pap30, hydraulic cylinders 8 of the hopper box with a swivel joint are connected to the valve 11 to close the bottom of the hopper box, locked in the closed position with latches 12. Pedal 13, valve 11 and rod 1 (5 spool 7 was connected to the Viepea system, t. To the drain line 14 of the main system after the spool valve 7, the filter 15 is turned on. Drain strips of the working sections and control lines of the bypass valve 5 of the multi-section distributor 4 through the drain pipe 16 and check valve 17 connected to the drain line of the autonomous steering system 18. The independent hydraulic system of the steering system contains a power pump 1 in the delivery line of which a safety valve is connected and the consumer 21 connected to the drain mag and 18 with the tank 1 through the filter 22. The device operates as follows. . The hydraulic fluid from the tank 1 is fed by the power pump 2 to the fan valve 3 and the multi-section distributor 4, which controls the operation of several hydraulic actuators. When its spools are in a neutral position, the bypass valve 5 is activated, and the liquid is supplied via the drain of the b line to the successively connected spool 7 of the hopper box and further along the drain line 14 and the filter 15. is drained into the tank 1. When a remote distributor 4 is withdrawn From the neutral position, the bypass valve 5 blocks the access of fluid to the drain, to tank 1, and the pressurized fluid goes to the hydraulic actuator; the hydraulic actuator is drained through the drain pipe 16 through the check valve 17 to the drain gistral autonomous system 18. In deriving pedal 13 from the initial position of the trigger Zs11delki 12, the locking valve JL1, and the stacker is opened. The fluid from the hydraulic cylinders 8 freely enters the drain through the drain line 14 and the filter 15 into the tank 1. After opening the keeper, the pedal 1 is set to its original position, the rod 10 of the spool 7 is equipped with a system of throttle from the neutral position, blocking the free access of the entire fluid flow to Drain into tank 1. Liquid under pressure enters through the throttle opening 9 of the spool 7 of the keeper to the hydraulic cylinders 8, which close the valve 11 of the bottom of the keeper, fixed in the closed position with latches 12. Release before and after the choke The first hole 9 is aligned, and the spring force of the stem 10 of the spool 7 of the hopper 7 is brought to the neutral position, allowing the flow of fluid to drain into the tank 1. At the moment the hydraulic system of the booster is activated, hydraulic actuators controlled by a multi-section distributor 4 can be activated. The invention significantly reduces the hydraulic capacity of the hydraulic system by reducing the number of pipelines and provides the possibility of independent operation of its main and autonomous systems. The invention of a combine harvester hydraulic system having an autonomous steering system with injection and discharge lines, a main system containing injection and discharge lines, a spool valve and a multi-section distributor, differing from the fact that in order to ensure independent operation of a hydraulic drive combine harvester in an emergency and reduce the metal of the hydraulic system, the main system is equipped with a check valve, and its multi-section distributor - bypass valve, p When in use, pumping the line connected & with a multisection distributor and an inlet of the relief valve, and the drain line of the relief valve through the spool box to the drain line of the main system, while the drain pipe of the multiple section distributor is connected via a non-return valve to the drain line of the autonomous steering system. Sources of information taken into account in the examination 1. Self-propelled combine harvesters SK-5 Niva, Technical Description and Operating Instructions, North-Caucasian Scientific Technical Information Center, Rostav-on-Don, 1977. p.59,, FIG. 55.,