SU1002687A1

SU1002687A1 - Hydraulic system

Info

Publication number: SU1002687A1
Application number: SU802871883A
Authority: SU
Inventors: Виктор Яковлевич Ермохин; Юрий Васильевич Виноградов; Виктор Валентинович Курдюков
Original assignee: Предприятие П/Я В-2869
Priority date: 1980-01-18
Filing date: 1980-01-18
Publication date: 1983-03-07

Description

.(54) ГИДРАВЛИЧЕСКАЯ СИСТЕМА. (54) HYDRAULIC SYSTEM

1one

Изобретение относитс -к машиностроению , в частности к регулируемым объемным приводам.The invention relates to mechanical engineering, in particular to adjustable displacement drives.

Известна гидравлическа система, содержаща по меньшей мере два источника давлени , соединенные между собой, с потребителем и сливом, и управл ющий клапан, вьшолненный в виде гидроуправл емого подпружиненного золотника , установленного в расточке корпуса с образованием трех распределительных полостей, подключенный средней распределительной полост|5Ю- к одному из источников давлени Cl .A known hydraulic system comprising at least two pressure sources interconnected with a consumer and a drain and a control valve, implemented as a hydraulically controlled spring-loaded spool installed in the bore of the body with the formation of three distribution cavities, connected to the middle distribution cavity | 5U - to one of the sources of pressure Cl.

Недостатком известной схемы вл етс невозможность работы клапана в режиме редукционного и предохранительного . A disadvantage of the known scheme is the impossibility of the valve operating in the reduction and safety mode.

Цель изобретени - расширение функшюнальны: возможностей.The purpose of the invention is the expansion of functional capabilities.

Указанна цель достигаетс тем, что в гидравлической системе, содержащей по меньшей мере два источника давлени , соединенные гидролини ми между собой,This goal is achieved by the fact that in a hydraulic system containing at least two pressure sources connected by hydrolines to each other,

С потребителем и сливом, и управл ющий клапан, вьшолненный в виде гидроуправл емого подпружиненного золотника, установленного в расточке корпуса с образованием трех распределительных по- лостей, подключенный средней распределительной полостью к одному из источников давлени , полость управлени клапана подключена к средней распределительной полости золотника, одна из крайних With the consumer and the drain, and the control valve, executed in the form of a hydraulically controlled spring-loaded spool installed in the bore of the housing with the formation of three distribution cavities, connected by an average distribution cavity to one of the pressure sources, the control cavity of the valve is connected to the middle distribution cavity of the spool, one of the extreme

to распределительных полостей подключена к напорной магистрали другого источника давлени , а втора соединена со сливом.The distribution cavities are connected to a pressure line of another pressure source, and the second is connected to a drain.

На чертеже изображена схема гидравлической системы.The drawing shows a diagram of the hydraulic system.

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Гидравлическа система содержит источники давлени 1 и 2, соединенные напорными гидролини ми 3 и 4 с потребителем (на чертеже не показан) и сливными гидролини ми 5 и 6 со сливом. 7. The hydraulic system contains pressure sources 1 and 2 connected by pressure lines 3 and 4 to a consumer (not shown) and drain lines 5 and 6 with a drain. 7

Claims

20 A control valve 8 is installed in the system, comprising a housing 9 in which a hydraulically controlled spring-loaded valve 1O spool 11 is located, forming a control cavity 12 in the housing and distribution cavities 13, 14: and 15, the cavity 14 being connected to pressure hydraulic line 4, cavity 13 is connected to pressure line 3, cavity 15 is connected to drain line 6, and control cavity 12 is connected by channel 16 to cavity 14. The hydraulic system works as follows. The working fluid from the pressure source 2 flows through pressure hydroline 4 to the distribution cavity 14, from pressure source 1 via pressure hydraulic 3 to distribution strip 13, and through the channel 16 the working fluid passes into the control cavity 12. With increasing pressure in the pressure hydraulic 4, and, respectively, in the channel iv of the control cavity 12, the spool is mixed upwards, reducing the flow area of the gap between the distribution cavities 14 and 13, which leads to an increase in the pressure drop in this slot and a decrease in pressure in the pressure chamber. Hydraulic lines 4. When the pressure drops in the pressure-driven hydraulic valve 4, valve 8 operates in the reverse order. valve 8 operates to thus reducing. With a sharp increase in pressure in the porous hydroline 4, the spool, overcoming the force of the spring 10, moves up and connects the distribution cavities 14 and 15, thus disconnecting them from the distribution cavity 13, thus, the working fluid from the pressure hydroline 4 flows through the drain hydroline 6 to drain 7, and valve 8 in this case works as a safety guard. This hydraulic system has high functionality, which allows to increase the reliability of its operation. Claims of the Invention A hydraulic system comprising at least two pressure sources connected by hydrolines between themselves, with a consumer and a drain, and a control valve, implemented in the form of a hydraulically controlled spring-loaded spool mounted in the bore of the housing with the formation of three distribution cavities, connected to the middle distribution cavity to one of the pressure sources, characterized in that, in order to expand its functionality, the valve control cavity is connected to the middle distribution one of the extreme distribution cavities is connected to the pressure line of another pressure source, and the second is connected to the drain. Sources of information taken into account in the examination of 1, Khaimovich E, M. Hydraulic drives and machine tool hydraulics. M., Mashgiz, GRAS. with. 223, FIG. 183.