SU1245769A1

SU1245769A1 - Hydraulic system

Info

Publication number: SU1245769A1
Application number: SU843781680A
Authority: SU
Inventors: Владимир Никитович Панфилов
Original assignee: Специальное Конструкторско-Технологическое Бюро Металлорежущего Инструмента И Оборудования
Priority date: 1984-08-17
Filing date: 1984-08-17
Publication date: 1986-07-23

Description

Изобретение относитс к гидроприводам гидрофицированных механизмов и может быть использовано, например, в приводах металлорежущих станков.The invention relates to hydraulic actuators of hydroficated mechanisms and can be used, for example, in drives of metal-cutting machine tools.

Цель изобретени - расширение функциональных возможностей путем обеспечени возможности работы гидроцилиндра от одного и от двух насосов и повышение надежности .The purpose of the invention is to enhance the functionality by enabling the operation of the hydraulic cylinder from one and from two pumps and improving reliability.

На чертеже представлена схема предлагаемого устройства.The drawing shows a diagram of the proposed device.

Гидросистема содержит насосы 1 и 2 разной производительности, сообщенные через обратный клапан 3, гидроцилиндры 4 и 5, первый из которых соединен с насосом I и сливом 6 через трехпозиционный реверсивный распределитель 7, а второй соединен с насосом 2 и сливом 6 через реверсивный распределитель 8 с программным управлением от кулачка 9. Штокова полостьThe hydraulic system contains pumps 1 and 2 of different capacities communicated through a check valve 3, hydraulic cylinders 4 and 5, the first of which is connected to pump I and drain 6 through a three-position reversing valve 7, and the second is connected to pump 2 and drain 6 through a reversing valve 8 sec program controlled by cam 9. Shtokova cavity

10 гидроцилиндра 4 соединена гидролинией 1 1 с насосом 2 через дроссель 12 и снабжена реле 13 давлени .The 10 cylinders of the hydraulic cylinder 4 are connected by a hydroline 1 1 to the pump 2 via a throttle 12 and are equipped with a pressure relay 13.

Гидросистема работает следующим образом .The hydraulic system works as follows.

При нахождении распределител 7 в нейтральной позиции в щтоковой полости 10 гидроцилиндра 4 поддерживаетс посто нное давление насосом 2, от которого работает гидроцилиндр 5 по заданной программе. При включении распределител 7 в верхнюю по чертежу позицию гидроцилиндр 5 работает от двух насосов 1 и 2.When the distributor 7 is in the neutral position in the thc cavity 10 of the hydraulic cylinder 4, a constant pressure is maintained by pump 2, from which the hydraulic cylinder 5 operates according to a predetermined program. When you turn on the distributor 7 in the top position on the drawing, the hydraulic cylinder 5 operates from two pumps 1 and 2.

При включении распределител 7 в нижнюю по чертежу позицию гидроцилиндр 4 совершает рабочий ход, а рабочее давление в гидроцилиндре 5 определ етс величиной гидросопротивлени дроссел 12. Реле 13 давлени контролирует наличие давлени в штоковой полости 10 гидроцилиндра 4 в его нерабочем положении.When the distributor 7 is turned on to the lower position in the drawing, the hydraulic cylinder 4 makes a working stroke, and the working pressure in the hydraulic cylinder 5 is determined by the throttle resistance value 12. The pressure relay 13 controls the presence of pressure in the rod cavity 10 of the hydraulic cylinder 4 in its inoperative position.

Claims

1. A HYDRAULIC SYSTEM, for example, a metal-cutting machine, containing two pumps of different capacities, two hydraulic cylinders, each connected to a pump with a higher capacity and discharged through a controllable reversible distributor, a pressure switch is installed in one of the cavities of one of the hydraulic cylinders, and it is connected to a pump with a lower capacity through a throttling device, and a non-return valve is installed in the communication line of the higher-capacity pump with a reversible distributor of the second hydraulic cylinder, characterized in that that, in order to expand the functionality by providing the possibility of the hydraulic cylinder working from one and from two pumps and increasing reliability, the reversible distributor of one of the hydraulic cylinders is made three-position with the connection of the discharge line and one of the branches to the drain and the second branch is locked with the spool in the middle position, a throttling device made in the form of an uncontrolled throttle, and a pump with a lower capacity is connected to the communication line of a pump with a higher capacity with reversible distribution edelitelem second cylinder after the check valve.

2. The hydraulic system in π. 1, characterized in that the control system of the reversible distributor of the second hydraulic cylinder is made in the form of a programmer in the form of a profile cam interacting with this distributor.

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