RU1781450C - Pneumatic actuator - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to a volume pneumatic actuator, and can be used to work with low-potential sources of pressure (energy of the working medium). The aim of the invention is to increase efficiency. This goal is achieved by the fact that in the pneumatic actuator, where the cap is the cap placed in the hydraulic reservoir with the possibility of vertical axial movement relative to the hydraulic reservoir and installed inside the cap of the plunger, the latter is made integrally with the bottom, and the supply and exhaust lines of the working medium communicate with the working cavity directly. 2 ill.

Description

The invention relates to the field of mechanical engineering, in particular to a volumetric pneumatic actuator, and can be used to work with low-potential sources of pressure (energy of the working medium).

The aim of the invention is to increase efficiency.

Figure 1 shows a pneumatic motor, a section; figure 2 - principal pneumatic diagram.

The proposed drive contains a hydraulic reservoir 1 with a bottom 2, power elements located in it, made in the form of a cap 3 with a working cavity 4 and in the form of a plunger 5, which is placed in the cavity 4. The supply and exhaust lines 6.7 are connected to a source of excess gas pressure, for example, with compressor 8. The cavity 4 is connected with lines 6, 7. The plunger 5 is rigidly connected to the bottom 2. The cap 3 is made with the possibility of vertical axial movement relative to the hydraulic reservoir 1, With the plunger 5 is connected the lower limit switch, made, for example, in the form of a pneumatic cylinder 9. An upper limit switch connected, for example, in the form of a pneumatic cylinder 10 is connected to the hydraulic reservoir. For example, in the piston cavities 11.12 of the cylinders 9, 10, return springs 13, 14 are placed. The lines 6.7 are equipped with pressure valves 15, 16 valves 17, 18. Venting valves 19, 20 are provided for relieving pressure. The rod 21 serves as the output element of the device.

The drive operates as follows.

The hydraulic reservoir 1 is filled with water until the plunger 5 is flooded and the free surface is covered with a gas-tight film, for example, a layer of crude oil. After that, the source 8 is started up and the valve 17 is opened. The valve 15 is opened by the pressure coming from the cavity 11 when the cylinder 9 is triggered. As a result, the compressed air flows through the line 6 into the cavity 4 and the cap 3 rises, overcoming the payload on the rod 21. After actuation of cylinder 10 by pressure from

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cavity 12 opens valve 20 and valve 15 closes. At the same time, valve 16 opens from the cavity 12 by pressure. As a result, the spent pressure is discharged to the compressor suction pipe 8 via line 7. To accelerate the discharge, pressure can also be released to the atmosphere through valve 18. As a result, cap 3 drops to the bottom 2. On all while lowering cap 3, valve 16 is open. In the extreme lower position of the cap 3, the cylinder 9 is activated and the duty cycle is repeated.

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Claims (1)

SUMMARY OF THE INVENTION A pneumatic actuator containing a hydraulic reservoir placed therein with the possibility of vertical axial movement of the floating working body and the supply and exhaust lines of the working medium, characterized in that, in order to increase the efficiency, the floating working body is made in the form of a cap with a working cavity in which a plunger rigidly connected to the bottom of the hydraulic reservoir, and the supply and exhaust lines are directly connected to the working cavity. I T h G. ##, # h -JL V / 27/7 xs P IT i Y / g2