Hydraulic valve

 

(57) Abstract:

Usage: in hydraulic machines and mechanisms for remote control of the Executive bodies. Essence: in the valve, comprising a housing 4, a valve 5, spring return 6, the control chamber 7, the pressure reducing valve 8 with electromagnetic control, end of the cavity 9 and 10, a head 11 and the drain 12 radial hole made in the form of rows of holes. 1 Il.

The invention relates to the field of automatic control, namely the elements of hydraulic circuits and can be used for remote control of the Executive bodies of various hydraulic machines and mechanisms.

The known valve, comprising a housing with a radial supply channels, working taps and drain, which has a spring-loaded spool, the end of which forms with the housing a control chamber, and the spool is made with two end cavities and pressure and radial drain holes made with the possibility of connection with the supply channel, working taps and drain [1]

A disadvantage of the known device is that it does not provide proportional odacieuses hydraulic valve, comprising a housing with a radial supply channels, control the Executive bodies and plum, which has a spring-loaded spool with two end cavities and pressure and radial drain holes [2]

The disadvantage of this dispenser is that it does not provide proportional control characteristic.

The aim of the invention is to improve the adjustment of the characteristics of the distributor by providing proportional supplying fluid to the actuators.

This goal is achieved by the fact that the hydraulic pressure distributor openings of the valve is made in the form of at least two rows of holes along the axis of the spool with respect to the distance between the centers of the holes of the rows L1 to the hole diameter D1 (L1/D1) is equal 0,19 0,11, and drain holes made in the form of at least three rows of holes along the axis of the spool, and the diameters of the holes of the first two rows of D2 are equal, the ratio of the distance between the centers of the holes of the first two rows L2 to the diameter of these holes D2 (L2/D2) is equal 0,19 0,11, the ratio of the distance between the centers of the holes of the first and third row L3 to the diameter of the holes of the first two rows of D2 (L3/D2) is equal to 0,equal to 2.3 to 2.0.

Analysis of the known solutions have not revealed the technical solutions with the stated set of essential features, which demonstrates the compliance of the claimed invention to condition patentability of "novelty". In addition, the proposed dispenser is not obvious from the prior art, i.e., involves an inventive step. Practice operating the valves suggests that the claimed solution has industrial applicability.

The drawing shows the proposed hydraulic distributor.

It includes a housing 1 with a radial supply channels 2, working taps 3 and drain 4, a valve 5, a spring-loaded spring return 6, the control of the control chamber 7, the pressure in which is set the reducing valve 8 with electromagnetic control. The spool 5 is made with two end cavities 9 and 10 and outlet 11 and the drain 12 of the radial holes. The discharge hole 11 made in the form of two rows of holes. The ratio of the distance between the centers of the holes of these rows L1 to the hole diameter D1 (L1/D1) is equal 0,19 0,11. Drain holes 12 made in the form of three rows of holes, the diameters of the holes of the first two rows of D2 are equal, otnoshyenii distance between the centers of the holes of the first and third row L3 to the diameter of the holes of the first two rows of D2 (L3/D2) is equal 0,59 0,49, moreover, the diameter of the holes of the third row D3 is less than the diameter of the holes of the first two rows and the ratio D2/D3 equal to 2.3 to 2.0.

The valve operates as follows.

When applying a control signal to the coil of the proportional solenoid, its plunger and its associated valve pressure reducing valve 8 is displaced in proportion to the current magnitude. The camera control 7 valve pressure reducing valve 8 is connected with the supply channel pressure control 13 and the pressure increases. This moves the spool 5 to the right (or left) and compression springs 6. The channel inlet 2 through the holes 11 in the valve cavity of the valve 9, the check valve 14 and opening 12 of the valve is connected with the control channel of the Executive bodies 3. At the same time, the control channel Executive bodies 3 on the other side of the valve through the holes 11 in the valve, the cavity of the spool 9, the check valve 14 and opening 12 of the valve is connected to the drain 4.

The amount of flow in the lines of business of taps is determined by the amount of displacement of the spool and the pressure drop across the throttling slots.

Pressure relief hydraulic valve 15 limit the pressure level in the working is>/P>Hydraulic valve, comprising a housing with a radial supply channels, management of working bodies and plum, which has a spring-loaded spool, the end of which is connected with the controls, and the spool is made with two end cavities and pressure and radial drain holes, characterized in that the discharge openings of the valve is made in the form of two rows of holes along the axis of the spool with respect to the distance L1between the centers of the rows of holes diameter of holes D1(L1/D1equal 0,19 0,11, and the drain holes are made in the form of three rows of holes along the axis of the spool, and the diameters of the holes of the first two rows of D2are equal, the ratio of rasstroena L2between the centers of the holes of the first two rows to the diameter of these holes D2(L2/D2is 0,19 0,11, the ratio of the distance between the centers of the holes of the first and third rows of L3to the diameter of the holes of the first two rows of D2(L3/D2is 0,59 0,49, and the diameter of the holes of the third row of the D3less than the diameter of the holes of the first two series and their relationship D2/D32,3 2,0.

 

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FIELD: machine building.

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