SU1418509A1 - Pneumohydraulic drive - Google Patents

Abstract

The invention allows for precise positioning of an actuating pneumatic hydraulic cylinder (PGC) 1. Pneumatic cavity (P) 6 PGC 1 communicates with pressure source 8 and discharge 9, and its hydraulic P 3 through throttle 5 with collector (K) 4. C 4 reported also hydraulic P 12 control PGC 10 and P single rod hydraulic cylinder 15 with drive 17. Pneumatic P 13 PGC 10 communicate with source 8 and reset through distributors 14, and control panels 1 and 10 on hydraulic cylinder 15 are installed to interact with limit switches E. To 4 are communicated through the locking element 19 with a compensation capacitance 18. When the volume of the working fluid in K 4 changes, the hydraulic cylinder 15 moves with the help of an actuator, changing the position of the PGC 10 and 1 rods to interact with their limit switches. At the same time, the switches of the hydraulic cylinder 15 also work, together with K 4 with a capacity of 18. 1 Il.

Description

General Mai Itoch-Executive

The invention relates to construction.

The purpose of the invention is to ensure the positioning of the pneumohydraulic cylinder.

The drawing shows a diagram of the pneumatic hydraulic drive.

The pneumatic-hydraulic actuator contains an actuating pneumatic cylinder 1 with a rod 2, the hydraulic cavity 3 of which is connected to the manifold 4 via the hydraulic throttle 5, and the pneumatic cavity 6 is connected through the distributor 7 to the pressure source 8 and the relief 9, control, pneumatic hydraulic cylinders 10 with the rods 11, hydraulic cavities 12 of which are connected to the manifold 4, and pneumatic cavities 13 are connected. through distributors 14 to source 8 of pressure and discharge 9, hydraulic cylinder 15 to rod 16, drive 17, KOM8

sensational capacity 18, shut-off element 19, limit switches 20-24.

Pneumogud works as follows.

The communication of the cavity 6 of the actuating pneumatic hydraulic cylinder 1 with a source of 8 pressure, and the cavities of 13 pneumatic hydraulic cylinders 10 with a relief 9, makes a working stroke 1 of the flow 2 by moving it to the left (according to the drawing). At the end of the working stroke 2 and the terminals 11, the limit switches 20 and 21 operate, respectively. If the volume of the working fluid in the manifold 4 and hydraulic cavities 3 and 12 changes, for example, by decreasing, the stop switches 21 will not work after stopping the rod 2 at the end of the working stroke and activating the limit pin 1 of 20 20 moves up (according to the drawing) to move the rods 11 to a far right upper position. When increasing the volume, for example, when the temperature of the working fluid rises, when the rods 1 1 move to the upper (according to the drawing) position and the limit switches operate, the rod 2 does not reach its final position and the limit switch 20 does not work, by applying the appropriate command to the actuator 17 16 it is downward, providing movement of the stem 2B left (according to the drawing) to the extreme position and actuation of the end of the 1st switch 20.

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five

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five

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five

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five

When the stem 16 is moved to the upper or lower extreme positions, the limit switches 23 and 24 are activated, which indicates a lack of working fluid in the actuator 17 or its excess, a command is given to open the locking element 19 and the collector 4 is connected to the compensation capacity 18 to compensate for the volume working fluid in the drive 17.

Claims (1)

Invention Formula A pneumatic-hydraulic actuator containing an actuator single-rod pneumohydraulic cylinder, the pneumatic cavity of which is connected through a two-position valve with a pressure source and a relief, controlling single-valve pneumohydraulic cylinders, the pneumatic cavity of each of which is connected through a two-valve valve to a pressure source, and hydraulics of the hydraulics of the hydraulic hydraulics of each of which are connected to a pressure valve. which is also connected to the hydraulic cavity of the executive pneumohydraulic cylinder, the sum of the volumes of hydraulic The volume of the hydraulic cavity of each subsequent control pneumohydraulic cylinder is twice as large as the volume of the hydraulic cavity of the previous pneumohydraulic cylinder, which in order to ensure accurate positioning of the pneumatic hydraulic cylinder of the previous hydraulic cavity, characterized in that in order to ensure accurate positioning of the pneumatic hydraulic cylinder, the pneumatic hydraulic cylinder is the same as in order to ensure the exact positioning of the pneumatic hydraulic cylinder of the previous hydraulic cavity, which in order to ensure accurate positioning of the pneumatic hydraulic cylinder, it is necessary to ensure accurate positioning of the pneumatic hydraulic cylinder of the previous hydraulic cavity. - a nostokovy hydraulic cylinder with a drive, a hydrothrottle, compensatory hydraulic capacity, a locking element m, the switch terminal E, the cavity communicates with a hydraulic cylinder kollektoro.m, hydraulic actuator pnevmogidrotsilindra cavity is connected to the collector through the throttle valve, on the actuating rods pnev.mogidrotsilindrov and cylinder mounted control authorities to cooperate with a limit switch E in finite positions of rods, On the actuator rod of the pneumohydraulic cylinder, a control is mounted with the ability to interact with the limit switch in one of the end positions of the rod, and The compensation tank is connected to the manifold through the locking element.