SU397682A1 - HYDRAULIC DRIVE OF RETURN AND TRANSFER MOVEMENTS - Google Patents

Description

one

Hydraulic actuators of reciprocating movements are known with an actuating hydraulic cylinder and a reversing spool having face control chambers for switching its plunger from one extreme position to another under the action of pressure in the working cavities of the hydraulic cylinder when the piston approaches its extreme positions.

However, the well-known hydraulic drive does not provide parallel operation of two differential differential pitch cylinders connected in series.

(The purpose of the invention is to expand the functionality of the hydraulic drive.

It is achieved by the fact that the hydraulic actuator is equipped with a second such differential actuating hydraulic cylinder, the parshneva cavity of which is in communication with the rod cavity of the main hydraulic cylinder. The end chamber of the distributor communicates with the piston (the CAVITY of the corresponding hydraulic cylinder) by means of check valves installed in parallel pipelines and connected to the battery pipe, the total of which is equal to the difference of the working cavities of one of the hydraulic cylinders.

The drawing shows the proposed gad2.

Recirculation reciprocating motion.

The hydraulic actuator includes a housing /, spool 2, pump 3, tank 4, pipelines 5 - //, hydraulic cylinders 12, 13, pistons 14, 15, check valves 16-18, accumulator 19, annular grooves a, b, c, polostn A , B, B, D, HPD cylinders, channel 20, axial channel 21, radial channel 22 and end chambers 23 and 24.

At the initial moment, the spool 2, located in the housing /, occupies the lowest position. The working fluid injected by the pump 3 from the tank 4 through the pipeline 5 into the annular groove a flows into the pipeline 6 and the cavity 4 of the hydraulic cylinder 12. The piston / 4 rises.

Working liquid, displaced from the cavity B of the hydraulic cylinder 12 through the pipeline 7, enters the cavity B of the hydraulic cylinder 13.

The piston 15 rises. The working fluid from cavity G through pipeline 8, annular groove b in spool 2, channels 20 and 2 and pipeline 9 is drained into tank 4. Oil pumping continues until then. until

the piston 14 in the hydraulic cylinder 12 will not rise to its highest position.

Further pumping up of the oil leads to an increase in pressure in the pipework 6 to the value to which the check valve is adjusted 16. As the pressure rises to the specified operating volume, the fluid through the pipeline 10 and through the return valve 16 enters the end chamber 23. Golden iran 2 moves iBBep- x and displaces the working fluid from the end chamber 24 of spool 2 through the check valve 17 through the pipeline // in (CAP. B of the hydraulic cylinder 13. The displacement of spool 2 in the upper position when the pipe is open 6 is facilitated by the accumulator pressure torus .19. In the upper position of the spool valve 2, the working fluid flows through the pipeline 5 into the annular groove a, pipeline 8 and IB. CAVITY D of the hydraulic cylinder 13. When the piston 15 moves downward, the working fluid goes from the hollow to the pipeline 7 enters the cavity 5 of the hydrocylpdra 12 . and moves the piston 14. The working fluid from position A through the pipe 6, the annular groove, the radial channel 22, the axial channel 21 and the pipe 9 is drained into the tank 4. When the pressure 14 reaches the lowest position cavity G of hydraulic cylinder 13 increases to -wheels the return valve 18. The fluid volume, the ravish of the volume of the piston cavity B -hydracilnir 13 and the rod end B gpdrotsiliidra 7, through the pipeline //, through the non-return valve 18, fills the front chamber 24 gold 2. 2. moves to the lowest position. The subject of the invention is hydraulic actuator-reciprocating movements with an actuating hydraulic cylinder and a reversible zolotniki, having an end control chamber for switching its puzer from one extreme position to another under the action of pressure in the working cavities of the hydraulic cylinder at the approach of its piston end position , characterized in that, in order to expand the functional capacity of the hydraulic actuator, it is equipped with a second such differential actuating hydraulic cylinder, the porsche cavity of which is communicated with u This, the main cavity of the main hydraulic cylinder, and the end chamber of the distributor communicate with the porsche cavity corresponding to its hydraulic cylinder by means of non-return valve valves and a connecting pipe to the battery, installed in parallel branches of the pipeline, and the total volume} 1 through 1 of 11 distributor end chambers equal to the difference in the volume of working cavities of one of the hydraulic cylinders.