SU543541A1 - Tractor hydraulic system - Google Patents

Description

(54) TRACTOR HYDROSYSTEM

The invention relates to a truck. With ::,, h-ssynya and is intended to control the hydraulic actuating of the active working bodies, mounted to the tractor machines.

Tractor hydraulic systems are known, containing two motors driven by a pump, interconnected by a main line, one of which is connected to a distributor that serves mainly to control the total flow of both pumps, and the second to a distributor equipped with a bypass valve and designed for controlling the flow rate of this pump, a group of executive hydraulic motors and a flow switch of the second pump. 15

The disadvantage of such a hydraulic system is the inability to provide mutually independent speeds of each of the groups of hydraulic engines with a speed control of 20 of one of them.

The aim of the invention is to provide mutually independent speeds of each of the groups of hydraulic engines with speed regulation of one of them.25

9

- i o-cis ibyb i i-iStis HiO i IDOuch: .l tv; .tractor is equipped with bytaH with additional: -; spool distributors, the ends of which are connected to a group of hydraulic motors,. connected to the distributor, prepg treasurer; for cost management: iogs .; and the torus-switch flow of the second pump through the jet is connected to the connecting 1 - the pump shaft, with the B connectors, .., l i-iar;: i the check valve is installed, which keeps the fluid from passing through the screen. one pump to the second, and rasirch; -target1dl control hydraulic motor.g mm: eoz dB-r position spool is connected. .

The drawing shows cxei.ic:; ..: LIFE hydraulic system.

Claims (1)

Pumps 1 and 2 are connected by mechs / beatings: iv; gistralyu 3. Pump 1 is connected i S-A. i-ralk with distributor 5; and pump 2 with mag: Rally 6 with distributor 7, equipped with a relief valve 8 and twin leads 9 to the hydraulic motors. On switch 3, the switch Yu is installed as a two-position rasplegel. Additional spool distributors 12 are connected to the trunk 11 of the dual Q terminals preloaded for connecting the hydraulic motors, the terminals of which are connected to the corresponding main lines 11. The spool distributors 12 are also connected to the end 13 of the switch 10. The end 13 of the switch 10 through the throttle 14 and the switch 10 connected to line 3. In line 3, a check valve 15 is installed. The bypass valve 8 is controlled by a two-way slide valve 16 mounted on line 17 connecting the bypass valve second valve 8 with the tank 18. Yu switch provided with a spring 19. Operation of the hydraulic system is effected cneduyuschim manner. In the independent operation mode, the flow of the pump 1 of the hydraulic motors connected to the distributor 5 and the flow of the pump 2 of the hydraulic motors connected to the distributor 7, the relief valve 8 is connected through the spool 16 through the valve 16 to the tank 18. The flow from the pump 2 is directed to the distributor 7 independently from the load of hydraulic motors connected to the distributor 7, since when the flow from the pump 2 passes through the bypass valve 8 of the distributor 7, the check valve 15 is closed regardless of the position of the switch Y. The pressure in line 6 determines pressure drain, and when loading hydraulic motors connected to the distributor 7, one of the paired pipes 11 of each hydraulic motor and the corresponding end cavity of the distributor 12 are connected to the tank 18, and the end 13 of the switch 10 is connected to the tank through the distributor 12 and the corresponding line 11, therefore the switch 10 under the action of the spring 19 is shifted to the position at which the highway 3 is blocked. In the drive mode of the hydraulic engines connected to the distributor 5 from the flows of pumps 1 and 2 with automatic switching of the flow from the pump 2 to the distributor 7, the control line 17 of the bypass valve 8 of the distributor 7 is blocked by the zolotnik 16, therefore the bypass valve 8 is closed. When the hydraulic motors of the distributor 7 are disconnected, the flow from the pump 2 through line 3 through the check valve 15 and the switch 10 is directed to the distributor 5. The switch 10 is open because the lines 11 are disconnected from the tank 18 and regardless of the position of the slide valves 2 to the end 13 of the switch 10 Around pressure has been summed up, determined by the loading of hydrodiglayers connected to the distributor 5 from line 3 via switch 10 and throttle 14. When the main engine of the distributor 7 is turned on, one of the dual lines 11 each The second motor and the corresponding end cavity of the distributor 12 are connected to the tank 18, the end 13 of the switch 10 is also connected to the tank through the valve 12 and the corresponding line 11, therefore the switch 10 is shifted by the action of the spring 19 to the position where the line 3 is blocked and the flow from the pump 2 is directed to the hydraulic motors connected to the distributor 7. The combination and interaction of the installed hydraulic elements allows to obtain the following operating modes of the tractor hydraulic system: simultaneous drive connected to distributors of hydraulic engines, each respectively from the flow of one pump; drive of hydraulic motors connected to one distributor from two pumps with automatic flow switching, one pump to hydraulic motors connected to another distributor for the period of their operation, invention Tractor hydraulic system comprising two driven by a pump motor connected by a line, one of which is connected with a valve that serves primarily to control the total flow of both pumps, and the second with a valve equipped with a bypass valve and designed for controlling the flow rate of this pump, the group of executive hydraulic motors and the switch of the second pump, so that, in order to ensure the interdependent speed conditions of each group of hydraulic engines with speed regulation, one: oh of them, it is equipped additional spool distributors, the ends of which are connected to a group of hydraulic motors connected to a distributor designed to control the flow rate, and the end of the flow switch of the second pump is connected through the jet with a pump connecting line, while a check valve is installed in the connecting line, preventing fluid from passing from one pump to another, and a valve for controlling hydraulic motors through a two-position spool is connected to a drain.