SU1497397A1 - Positive displacement drive - Google Patents

Abstract

This invention relates to a machine-building volumetric pneumatic actuator and can be used in drives of technological machines. The purpose of the invention is to expand the functionality of the drive. The volumetric power supply 1 is connected via a reversing distributor 3 to a volumetric engine 2 of pressure and drain lines 6, 7, and the drain line 7 is connected to the drain 9 via the on-off distributor 4 with the control cavity 5 connected through the retarding device 10 to the drain line 7. When the drive is in operation, the movement of the engine 2 is determined not only by the pressure in the pressure line 6, but also by the counter-pressure in the discharge line 7, which controls the position of the distributor 4, which provides adjustment of the speed of the engine 2. 1 sludge.

Description

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This invention relates to a machine-building volumetric pneumatic actuator and can be used in drives of technological machines.

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

The drawing is a diagram of the volumetric drive.

The volumetric drive contains a volumetric power source 1 (compressor), an executive volumetric engine 2, a reversing valve 3 and a two-position, pressure-controlled valve 4 with a control cavity 5, the power source 1 being connected to a reversing valve 3 of pressure and drain lines 6, 7, and the volumetric engine 2 is connected to the reversing distributor 3.

The drain line 7 is connected to the input 8 of the volumetric power source 1, and through the two-position valve 4 to the drain 9. The control cavity 5 of the distributor 4 is connected through the retarding device 10 to the drain line 7, and the retarding device 10 is made in the form of two parallel lines 11, 12 control, containing each choke 13 and check valve 14. In addition, the actuator includes receivers 15, 16, valve 17 and air preparation unit 18. The inlet 8 of the power source 1 is also connected via a check valve 19 with a drain 9 (atmosphere).

When the power source 1 (compressor) is turned on, air from receiver 15 and, if it is not enough, from drain 9 (atmosphere) through a check valve 19 enters input 8 of power supply 1, from where compressed air passes through receiver 16 and air preparation unit 18 to the pressure head. line b and through the reversing distributor 3 - to the volumetric engine 2 where air comes from

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to drain line 7 and through valve 17 to receiver 15 and to input 8 of power supply 1. When a certain pressure level is reached at drain line 7,

the inclusion of the distributor 4, providing the connection of the drain line 7 with the drain 9 (atmosphere). When this occurs, the displacement of the volumetric engine 2 takes place, since the pressure of the overpressure in the drainage of the SRI 7 sharply decreases. the case of backwater in the discharge line 7 provides a reduction in its operating speed.

The adjustment of the throttles 13 of the retarder device 10 allows the drive to be used in various mechanisms.

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Claims (1)

Invention Formula A volumetric drive containing a volumetric power source, an executive volumetric engine, a reversible valve and a two-position, pressure-controlled valve with a control cavity, the power source connected through a reversing valve to a volumetric engine in a closed loop with a counter and drain lines, and the latter is connected with a drain through a two-position distributor, characterized in that, in order to expand the functionality, the control cavity of the two-position distributor with It is connected to a drain line through a retarding device, made in the form of two parallel control lines, each containing a choke and a check valve.