SU1721318A1 - Method for adjusting electrohydraulic converter - Google Patents

Abstract

The invention relates to hydraulics and can be used in the manufacture of electro-hydraulic control systems. The aim of the invention is to improve the accuracy of the adjustment. First, magnetizing magnets of the electromechanical transducer 4 is performed, the latter is mounted on the nozzle-flap hydraulic booster, and hydraulic nozzles 7 and 8 are supplied with hydraulic fluids 5, 6 through chokes 9 and 10. Then the magnet 15 is shunted by shunts 20 and, by moving the nozzles 7, 8, according to the readings of the pressure gauges 11, 12, the same pressure is established in front of the nozzles 7.8. Thereafter, the shunts 20, 21 are removed, and the magnetic flux is closed through the bore 13 and the poles 16-19 and the bark 13 with the shutter 14 is shifted from the neutral position. The modification of the ends of the poles 16-19 of the magnets is carried out after the removal of the shunting until the pressure in front of the nozzles 7, 8 is reached. 3 sludge.

Description

sl C

The invention relates to hydraulics and can be used in the manufacture of electro-hydraulic control systems.

The aim of the invention is to improve the accuracy.

FIG. 1 is a schematic diagram of an electro-hydraulic converter and device for implementing an adjustment method; in fig. 2 shows section A-A in FIG. 1 at the time of installation of the shunt; in fig. 3 is a graph of magnetic and mechanical moments versus valve movements.

A device for implementing the adjustment method consists of a housing 1, on the upper plane of which a cylindrical cavity 2 is made with a diameter equal to the diameter of the mechanical spring 3 of the electromechanical transducer 4.

In case 1, perpendicular to the axis of the cylindrical cavity 2, power lines 5 and 6 are made with housed in. they are movable nozzles 7 and 8 and unregulated throttles 9 and 10, forming a hydraulic bridge.

Pressure gauges 11 and 12 are mounted on housing 1 with the ability to measure pressure in power lines 5 and 6.

With a mechanical spring 3 transducer 4 zhestkos zan measles 13 with a flap 14.

In addition, the electromechanical converter 4 includes a magnetic conductor 15 with poles 16-19 magnets (not indicated).

X |

GO

l

s

00

grandfather

For the operation of shunting the magnetic circuit 15, shunts 20 are provided. 21.

The adjustment of the electro-hydraulic converter is carried out as follows.

At first, magnets are magnetized, as a result of which the magnetic field of the permanent magnets of the magnetic core 15 will create a permanent magnetic flux FM, which closes through the bark 13 and poles 16-19.

After that, the transducer 4 is installed on the hydraulic booster nozzle-flap (not labeled), placing between its movable nozzles 7 and 8, the flap 14 of the core 13.

The nozzles 7 and 8 are supplied with hydraulic fluid through unregulated chokes 9 and 10 through power hydrolines 5 and 6.

Then the operation is carried out by shunting the magnetic core 15, closing the pole 16-19 permanent magnets by shunts 20, as a result of which the constant magnetic flux FM will close not through the measles 13 and the poles 16-19, but through the installed shunts 20 and the magnetomotive forces of the polarized flow FM will not affect measles 13, and therefore, the valve 14.

Then, by moving the nozzles 7 and 8, according to the readings of the pressure gauges 11 and 12, an equal pressure is established in front of the nozzles 7 and 8, thereby ensuring equal gaps between the planes of the valve 14 and the ends of the nozzles 7 and 8, i.e. the neutral position of the flap 14 at a zero control signal and a zero magnetic moment acting on the measles 13.

Then the shunts 20 are removed, and the magnetic flux FM snrve closes through the measles 13 and poles 16-19, but since the magnitudes of the gaps between the poles 16-19 and the planes of the core

13 have different meanings; measles 13 will be affected by a magnetic moment

DMMG.

Exposure to magnetic moment

DMMG will cause the deflection of the valve 14 by the value of X Xi 2 Xg and, consequently, the inequality of pressure in the line x 5 and b, which will show the gauges 11 and 12.

From the difference in the readings of the pressure gauges 11 and 12, it is determined which ends of the poles 16 to 19 and by what amount need to be modified to provide the specified gaps, A3.i, dg and dz. at which AMMEg 0, and Xg X2.

This achieves the equality of the pressures in front of the nozzles 7, 8 and thus the neutral position of the electro-hydraulic converter as a whole.

Formula of invention

The method of adjusting the electro-hydraulic converter, including the operations of magnetizing the magnets of the electromechanical converter and providing a predetermined gap between the cortex connected to the flap and the ends of the poles due to the finalization of the latter, and after installing the electromechanical converter on the hydraulic booster the nozzle-damper with respect to the flap corresponding to the equality of pressures in front of the nozzles, characterized in that Accelerating precision after magnetizing electromechanical transducer mounted on a hydraulic actuator, and its magnetic circuit is shunted, after which position adjustment is performed nozzles, and the step

reworking of the ends of the poles is carried out after removing the shunting, until equal pressures are reached before the nozzles.

and

la 1

 i L /// y i / - vt

Lt / Mr-L- / / Gs

k

/ I /

 I / P

N /,

 / ht / tt

V

Zzl

/////// J &.

th

m / m / iex.

m

flex.

Figz

Claims (1)

Claim A method for adjusting an electro-hydraulic converter, including magnetizing the electromechanical converter magnets and providing a predetermined gap between the armature and the ends of the poles connected to the flap by finalizing the latter, and after installing the electromechanical converter on the nozzle-flap hydraulic booster, the nozzle position adjustment operation to ensure their neutral position relative to the flap corresponding to the equality of pressure in front of the nozzles, characterized in that, in order to increase In order to improve accuracy, after magnetization, the electromechanical converter is mounted on the ’hydraulic booster, and its magnetic circuit is shunted, after which the nozzle position is adjusted, and the operation to modify the ends of the poles is performed after removing the bypass, until the pressure is equal in front of the nozzles. Co m u Figs