SU1479724A1 - Two-way control valve - Google Patents

Abstract

The invention relates to hydropneumatic automation and allows increasing the reliability of manually operated distributors by creating a tactile effect. In the cylindrical bore 6 of the housing 1 a spool 7 is placed, in a non-magnetic part 2 of the housing 1 a circular permanent magnet 8 is placed coaxially covering the spool 7. When the control signal is applied, the spool 7 moves to the right. In the course of the spool 7, the control force increases, since the force of interaction between the magnet 8 and the spool 7 is increased. After displacing the spool 7 by a certain amount, the control force reaches a maximum value, after which the operator feels a "failure" of the force before the spool 7 rests on the stop. The tactile effect obtained in this way indicates that the spool 7 is in the right extreme position. 2 Il.

Description

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The invention relates to hydropnection automatization and can be used in hydropneumatic systems with operator control.

The purpose of the invention is to increase reliability by creating a tactile effect.

Figure 1 shows the structural diagram of the distributor; Fig. 2 shows the dependence of the force generated by a permanent magnet on the magnitude of the movement of the beam a.

Two-way distributor contains body 1 with non-magnetic part

2 with pressurized 3, drain 4 and 5 working channels, in the cylindrical bore 6 of which a spool 7 is placed, a return device of the spool to its initial position, made in the form of an annular permanent magnet 8, axially covering the spool 7, and the magnet 8 is placed in part 2 of the housing 1, made of a non-magnetic material, and the spool 7 is made of a magnet of a soft material.

The distributor works as follows.

In the initial position (Fig. 1), the spool 7 is retracted by an annular permanent magnet 8 and rests on the non-magnetic part 2 of the housing 1 with a force P, the working channel 5 is disconnected from the pressure channel

3and communicated with the drain channel 4.

After S's move

displacement of the spool 7 by a value equal to 0.7-0.85 of its full

the latter is in the position corresponding to the maximum force of the interaction of the magnet 8 and the spool 7 - R ... With further measurement, the COP

A decrease in the force of interaction between the magnet 8 and the spool 7 occurs in the valve 7. The operator feels a sharp decrease in the resistance force of the slide 7 to the right, the so-called control failure before the valve 7 rises to ynopt. occupied right extreme position. In order to ensure that the spool 7 returns to its initial position, it is necessary that the force developed by the magnet 8 when the spool 7 reaches the right extreme position is 2-3.5 times the friction force of the spool.

Claims (1)

Formula invented A two-way valve, comprising a housing with a pressure, drain and working channels, in the cylindrical bore of which a spool is placed, a return device of the spool to its initial position, characterized in that When a control signal is applied (application, with increased reliability, the device The pushing force of the spool 7 begins to move to the right, moving out of the ring magnet 8. In the course of the spool 7, the control force P increases (Fig. 2), as 40 as the force of interaction between the magnet 8 and the spool 7 increases. The return of the spool is made in the form of a ring permanent magnet, covering the spool sially, the magnet is placed in a part of a building made of a non-magnetic material, and the spool is made of a soft material magnet. The return of the spool is made in the form of an annular permanent magnet coaxially covering the spool, the magnet being placed in a part of the body made of a non-magnetic material, and the spool is made of a magnet of a soft material. Р О eight y-1 I / 5 fiR.2