SU717410A1 - Pneumatic-hydraulic converter - Google Patents

Description

\ -X, G. Union of Soviet Socialist Republics

.1 USSR State Committee for the Affairs of Inventions and Discoveries Mr. ‘Ί -

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(72) Author of the invention

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(71) Applicant ’‘ I J * · (

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Inventions

TO AUTHOR'S CERTIFICATE (61) Additional to author. certificate-wu - (22) Declared 03.01.77 (21) 2436963 / 25-06 with the addition of application No. (23) Priority -

Published 251) 2.80. Bulletin No. ~)

Date of publication of the description 02.25.80

P.G. Mishchenko

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All-Union Scientific Research and Design Institute of Industrial ¹ and Hydraulic Automatics VNIIHydrodrive (54) PNEUMATIC HYDRAULIC CONVERTER l- _ν '<· ί- <'>

... Ah? ·· Hell?. ·>; .. Mr. -...

· ’''‘ ’'The invention relates to the field of • mechanical engineering, in particular to devices for converting pressure -“ air into a higher pressure fluid. bones And is it intended to be used as a source of high pressure in hydraulic clamping stations? fixtures for fixing parts: metal cutting machines. . ~

Known pneumohydroreforms Ethel,. Containing the housing, the reservoir for RA.

^; fluid> a pneumatic cavity separated by a reservoir, a liquid pressure cavity and a pneumatic piston installed in the horn, an axial channel is made in the horn with a non-return valve located in it for “tanking” the tank with a high pressure liquid cavity [1]. _{t (} A disadvantage of the known device is its considerable height due to the fact that the lower level in the working fluid reservoir is limited by the protruding part of the stem (not more than the piston’s stroke in the hydraulic cylinder) and the oil volume below this level is not working 'blEz'ue't'sya. in addition, the assembly of this design is difficult due to the inevitable build reverse ~ * g' ^and _g th --g dammed high in pnevmoposhtoke koto15 y * (aND) 717 410 (51) M. Cl. ²

F 15 V 3/00 (53) UDC 62-82 (088.8) 'I! - ·, · design hydraulic actuators

A. / valve directly on the assembled pneumohydroconverter, which reduces the reliability of its operation.

The purpose of this invention is to reduce the size and increase reliability.

This is achieved by the fact that a hollow sleeve is installed in the axial channel of the rod. ka, the upper end of which is fixed in the partition, and the lower serves as a stop for the check valve. .

The invention is illustrated in the drawing.

The pneumatic hydraulic converter comprises a housing 1, in which a reservoir 2 for the working fluid and a pneumatic cavity 3 are located, separated from the reservoir 2 by a partition 4. In the pneumatic cavity 3, a pneumatic piston 25 is located, the rod 6 of which is. , simultaneously with a plunger to create pressure in. · a liquid cavity 7 of high pressure. An axial channel 8 is made in the piston rod 6 of the pneumatic piston 5 with a check valve 9 located therein, which communicates the reservoir 2 and the high-pressure fluid cavity 7. In the axial channel 8 is also installed a hollow sleeve 10, the upper end of which is fixed e

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to the partition 4, and the lower end serves as a stop for the non-return valve 9. Air supply to the upper part of the tank 2, as well as to the pneumatic cavity 3 (above the pneumatic piston 5 for direct operation and under the pneumatic piston 5 ~ for reverse) is carried out through the air distribution valve 11, and for for this purpose, a nozzle 12 is installed in the tank 2. A high-pressure working fluid is discharged from the fluid cavity 7 through the nozzle 13.

The pneumatic-hydraulic converter works as follows. '

When the handle of the valve 11 is rotated to the pre-clamp position, compressed air 'enters the upper part of the reservoir. 2. ? Under the pressure of compressed air, the working fluid from the tank 2 through the hollow sleeve 10 and the open check valve 9 enters the fluid cavity 7, and from it working bodies (not shown) to perform installation moves at low pressures.

When the valve 11 is subsequently switched to the final clamp position, the air enters the air cavity 3 above the pneumatic piston '5, which, together with the rod 6, lowers, while the check valve 9 moves away from the lower end of the hollow sleeve 10 and closes under the action of the spring. With further movement of the pneumatic piston 5 in the liquid cavity 7 High pressure is transmitted to the working bodies

When the valve 11 is in the expanding position, compressed air enters i

ЦНИИПИ Order 9804/48 Circulation 798 Subscription

Branch of the SPT ¹ 'Patent'', Uzhgorod, Proektnaya St., 4 pneumatic cavity 3 under the pneumatic piston 5, and out of the cavity above the latter and reservoir 2 into the atmosphere.

In this case, the piston 5 moves up and the fluid from the working bodies of the post; falls into the fluid cavity 7, and then through the opened check valve 9 and the reservoir 3. ι

The invention allows to reduce the size of the pneumatic transducer. and increase its reliability.

Claims (1)

Claim A pneumatic-hydraulic converter comprising a housing, a reservoir for the working fluid, a pneumatic cavity separated from the reservoir by a baffle, a high-pressure fluid cavity and a pneumatic piston installed in the pneumatic cavity, in the piston rod of which there is an axial channel with a non-return valve located in it for the reservoir to communicate with the fluid cavity. High ¹ pressure, - t otal, which, in order to reduce dimensions and increase reliability, a hollow sleeve is installed in the axial channel of the rod, the upper end of which is fixed in the partition, 3 Q and the bottom serves as a stop for the check valve. Sources of information taken into account during the examination 1. Pneumohydraulic drives for machine tools, overview. M., CINTI for automation and mechanical engineering, 1963, series Sh-77, p. 28, Fig. 10 6.