SU658320A1

SU658320A1 - Hydraulic pulsed valve

Info

Publication number: SU658320A1
Application number: SU752141603A
Authority: SU
Inventors: Игорь Борисович Матвеев; Ростислав Дмитриевич Искович-Лотоцкий; Роман Романович Обертюх
Original assignee: Винницкий политехнический институт
Priority date: 1975-05-29
Filing date: 1975-05-29
Publication date: 1979-04-25

Description

(54) ГИДРОИМПУЛЬСНЫЙ КЛАПАН(54) HYDROPULSE VALVE

II

Изобретение касаетс аппаратуры управлени и регулировани гидравлических систем и может быть использовано, например , в гидроприводах вибропрессах, испытательных вибростендах и т. п.The invention relates to control equipment and adjustment of hydraulic systems and can be used, for example, in hydraulic drives, vibropresses, test vibrostands, etc.

Известен гидроимпульсный клапан, содержащий гидроаккумул тор, запорный орган , цилиндрический толкатель и клапанпилот 1.Known hydraulic pulse valve containing a hydroaccumulator, shut-off body, a cylindrical pusher and valve pilot 1.

Недостатком этого клапана вл етс невысока частота пульсаций давлени , обусловленна длительным временем срабатывани запорного органа.The disadvantage of this valve is the low frequency of pressure pulsations due to the long response time of the valve member.

Известен также гидроимпульсный клапан , содержащий гидроаккумул тор, клапан первого каскада золотникового типа с индикаторным стержнем и клапан второго каскада с цилиндрическим толкателем 2.Also known is a hydroimpulse valve containing a hydroaccumulator, a valve of the first cascade of a spool-type with an indicator rod, and a valve of the second stage with a cylindrical pusher 2.

Однако дл такого клапана характерно низкое быстродействие из-за наличи перекрытий в золотниковых элементах, а следовательно , и невысока энерги импульса рабочей жидкости, подаваемой в гидросистему .However, such a valve is characterized by a low response rate due to the presence of overlaps in the slide elements, and, consequently, a low pulse energy of the working fluid supplied to the hydraulic system.

Целью изобретени вл етс повыщение энергии импульса.The aim of the invention is to increase the pulse energy.

Это достигаетс тем, что в предложенном клапане клапан второго каскада выполнен в виде двух соосно расположенных впускного и выпускного запорных элементов стаканного типа, имеющих сквозные осевые расточки и обращенных рабочими торцами во внутрь навстречу один другому, причем в осевой расточке впускного запорного элемента установлен клапан-пилот, а цилиндрический толкатель размещен в осевой расточке выпускного запорного элемента .This is achieved by the fact that in the proposed valve, the valve of the second cascade is made in the form of two coaxially arranged inlet and outlet shut-off elements of the glass type, having through axial bores and turned by working ends inward towards one another, with the pilot valve , and the cylindrical pusher is placed in the axial bore of the outlet valve.

Предложенный гидроимпульсный клапан схематически изображен на чертеже.The proposed hydraulic pulse valve is shown schematically in the drawing.

Claims

It contains hydroaccumulator 1, valve 2 of the first cascade of a spool type with indicator rod 3 and valve 4 of the second stage with a cylindrical pusher 5. Valve 4 is designed as coaxially arranged inlet 6 and outlet 7 locking elements, each of which has a corresponding through axial boring 8 and 9. The working end 10 of the inlet valve 6 is turned inward towards the working end 11 of the outlet valve 7. In the axial bore 8 of the locking element 6 there is a valve pilot 12, and in the axial bore 9 of the locking valve element 7 - a cylindrical pusher 5. The delivery line 13 communicates with the cavity 14 made in the valve body 4 of the second stage, and through the channel 15 - with the cavity 16 made in the valve body 2 of the first stage. The valve 2 has a channel 17, which is connected with a cavity 18 formed by a bore 19 and an indicator rod 3. A spring 20 and a screw 2 are installed in the cover 22. The cavities 23, 24 and 25 are communicated by channels 26, 27 and 28 with a drain line 29, A control line 30 controls the working organ and a cavity 31 with a cavity 32 of the outlet 7. The spring 33 presses the pilot valve 12 to the locking element 6, blocking the passage of fluid from the cavity 34 into the cavity 31. In the cavity 34, the liquid is supplied from the cavity 14 through the throttle orifice 35, suprahepical in the shut-off element. Note 6. The impulse valve works as follows. The working fluid under pressure is supplied via a pressure line 13 into cavity 14 and further along channel 5 into cavity 16. Through channel 17 of valve 2, the liquid enters cavity 18 formed by bore 19 in valve 2 and indicator rod 3. The opening pressure of valve 2 of the first stage is regulated by means of a spring of 20n screws 21 located in the lid 22. When the pressure in the system is lower than the pressure of 5 pa, the valve 2 is adjusted, the cavities 23, 24 and 25 are connected to the drain line 29 via channels 26,27 and 28. opiaHOM 30 and but The cavity 31 communicates with the drain cavity 32 of the outlet element 7. The pilot valve 12 is pressed by the spring 33 to the locking element 6 and blocks the passage of fluid from the cavity 34 (into which fluid enters the cavity 14 through the throttle hole 35 in the locking element 6) into the cavity 31. In addition, the inlet closure element 6 also blocks the passage of fluid from cavity 14 to cavity 31. With increasing pressure in the system. You adjust the setting pressure, the valve valve gold 2 of the first stage shifts to the right, closes channel 27 and separates cavities 23 and 24 with CAVITY 25 connected with about the drain line 29, together with the cavity 16 (to which the working fluid is supplied under pressure) with the cavities 24 and 23 and reliably fixing the valve of the clanan 2. The working fluid under pressure in the cavity 24 acts on the outlet locking element 7 and lowers it . The outlet shut-off element 7 moves down faster than the pusher 5, since the spring 33 and the fluid pressure in the cavity 34 acting on the pilot valve 12 prevent the movement of the pusher 5 After the element 7 is seated with the end And on the saddle the cylindrical pusher 5 moves and opens the valve- pilot 12. The resulting pressure difference between the cavities 14 and 34, due to the presence of the throttle bore 35, and the force of the pusher 5 acting on the inlet element 6 after opening the pilot valve 12, cause the opening of the inlet stop element that 6. Hydroaccumulus 1 is discharged. The pressure in the hydraulic system decreases as the hydroaccumulator 1 drops, the valve spool 2 under the action of the spring 20 moves to the left position, communicating together the cavities 23, 24 with the cavity 25 and the drain line 29. Under the action of the spring 33, the pilot valve 12 and the locking element 6 return to the starting position. The outlet shut-off element 7, under the action of pressure in cavity 31, opens and connects the control line of the working body 30 through cavity 31 to drain cavity 32. Thus, the hydraulic pulse valve returns to its initial position. Claims of the invention: A hydraulic pulse valve comprising a hydraulic accumulator, a first spool type valve with an indicator rod and a second cascade valve with a cylindrical pusher, characterized in that, in order to increase the pulse energy, the second cascade valve is made in the form of two coaxially arranged inlet and outlet valves stakannogo type. having end-to-end axial bores and formed by working ends inward towards one another, and a pilot valve is installed in the axial bore of the inlet closure element, and the cylindrical pusher is placed in the axial bore of the outlet closure element. Sources of information taken into account during the examination 1. USSR author's certificate No. 443219, cl. F 16 K 17/10, 1972.

2. Author's certificate of the USSR Ho 153815, cl. F 16 K 21/12, 1961.

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