SU754128A1

SU754128A1 - System for synchronizing rods of two hydraulic cylinders

Info

Publication number: SU754128A1
Application number: SU762383745A
Authority: SU
Inventors: Владимир Петрович Мищенко
Original assignee: Азовский Завод Кузнечно-Прессового Оборудования
Priority date: 1976-07-12
Filing date: 1976-07-12
Publication date: 1980-08-07

Description

Изобретение относится к'системам синхронизации движения исполнительных органов различных машин и может быть ис пользовано, например, для обеспечения синхронизации движения ползунов листогибочных гидравлических прессов и ножевых ба- ₅лок гидравлических листовых ножниц.The invention relates to systems for synchronizing the movement of executive bodies of various machines and can be used, for example, to provide synchronization of movement of sliders of hydraulic press brakes and knife shears of ₅ hydraulic sheet shears.

Известна система синхронизации штоков двух гидроцилиндров, приводимых регулируемым двухпоточным насосом, соединяющая дополнительный насос, блок синхронизации с двухходовыми двухпозиционными 10 распределителями, сливные магистрали, а также напорные магистрали, соединяющие разноименные поршневые и штоковые по- лости гидроцилиндров с регулируемым двухпоточным насосом [11.A known system for synchronizing the rods of two hydraulic cylinders driven by an adjustable two-flow pump, connecting an additional pump, a synchronization unit with two-way on-off 10 distributors, drain lines, as well as pressure lines connecting the opposite piston and rod cavities of the hydraulic cylinders with an adjustable double-flow pump [11.

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Недостатком этой системы является то, что при использовании ее в составе листовых ножниц с наклонным ножом, т. е. в случае перемещения точки приложения рабочей нагрузки вдоль ножевой балки на ра- ₂о бочем ходу, она не обеспечивает устойчивого перемещения исполнительных органов.The disadvantage of this system is that when using it as part of shears with inclined blade, ie. E. In the case of moving the point of application along the workload on the blade beam of the PA ₂ bochem course, it does not provide stable movement executive.

Целью изобретения является расширение диапазона рабочих нагрузок с сохра2 нением устойчивой работы исполнительных органов.The aim of the invention is to expand the range of workloads while maintaining the stable operation of the executive bodies.

Это достигается тем, что в напорных магистралях установлены нормально закрытые распределители, сообщающие поршневые полости гидроцилиндров со сливными магистралями, в которых установлены дополнительные нормально закрытые распределители.This is achieved by the fact that normally closed distributors are installed in the pressure lines, communicating the piston cavities of the hydraulic cylinders with drain lines, in which additional normally closed valves are installed.

На чертеже изображена принципиальная схема описываемой системы синхронизации штоков двух гидроцилиндров.The drawing shows a schematic diagram of the described system for synchronizing the rods of two hydraulic cylinders.

Система обеспечивает синхронизацию •движения штоков 1 и 2 гидроцилиндров 3 й 4 и содержит регулируемый двухпоточный насос 5, дополнительный насос 6, блок синхронизации 7 с двухходовыми распределителями 8, 9. Гидроцилиндры 3 и 4 имеют штоковые 10, И и поршневые 12, 13 полости.The system provides synchronization • of the movement of the rods 1 and 2 of the hydraulic cylinders 3 and 4 and contains an adjustable dual-flow pump 5, an additional pump 6, a synchronization unit 7 with two-way distributors 8, 9. Hydraulic cylinders 3 and 4 have rod 10, I and piston 12, 13 cavities.

Напорные магистрали 14, 15 двухпоточного насоса 5 соединяют разноименные полости 10, 13 и 11, 12 гидроцилиндров 3 и 4. Слив рабочей жидкости осуществляется по магистралям 16, 17, 18. В напорных магистралях 15, 14 установлены нормально закрытые распределители 19, 20, сообщаю щие поршневые полости 12, 13 гидроцилиндров 3, 4 с магистралями 16, 17. В сливных магистралях 21, 22, сообщенных с магистралями 16, 17 через поршневые полости 12, 13 гидроцилиндров 3, 4, установлены дополнительные нормально закрытые распределители 23, 24.The pressure lines 14, 15 of the double-flow pump 5 connect the opposite cavities 10, 13 and 11, 12 of the hydraulic cylinders 3 and 4. Drain the working fluid along the lines 16, 17, 18. Normally closed valves 19, 20 are installed in the pressure lines 15, 14, I inform additional piston cavities 12, 13 of hydraulic cylinders 3, 4 with lines 16, 17. In drain lines 21, 22 connected to lines 16, 17 through piston cavities 12, 13 of hydraulic cylinders 3, 4, additional normally closed distributors 23, 24 are installed.

Напорные магистрали 14, 15 насоса 5 связаны трубопроводами 25, 26 с предохранительно-разгрузочным клапаном 27 через обратные клапаны 28, 29.The pressure lines 14, 15 of the pump 5 are connected by pipelines 25, 26 to the safety-unloading valve 27 through the check valves 28, 29.

Управление предохранительно-разгрузочным клапаном 27 осуществляется электромагнитом 30.The safety relief valve 27 is controlled by an electromagnet 30.

Полости управления 31,.32 распредели^ телей 19, 20 магистралями 33, 34, 35 связаны с трехпозиционным четырехлинейным распределителем 36, управление которым осуществляется электромагнитами 37, 38. Полости управления 39, 40 дополнительных распределителей 23, 24 подключены при помощи трубопровода 41 к распределителю 36, вход которого трубопроводом 42 подключен к напорной магистрали 43 дополнительного насоса 6, в которой установлен предохранительный клапан 44. Напорная магистраль 43 дополнительного насоса 6 при помощи трубопровода 45 и дросселей 46, связана с каналами управления 48, 49 двухпоточного насоса 5. Канал управления регулирует подачу рабочей жидкости в напорной магистрали 14 и подключен к распределителю 9, а канал управления 49 регулирует подачу рабочей жидкости в напорной магистрали 15 и подключен к двухходовому двухпозиционному распределителю 8.The control cavities 31, .32 of the valves 19, 20 of the lines 33, 34, 35 are connected to the three-position four-way valve 36, which is controlled by the electromagnets 37, 38. The control cavities 39, 40 of the additional valves 23, 24 are connected via a pipe 41 to the valve 36, the input of which is connected by a pipe 42 to the pressure line 43 of the additional pump 6, in which the safety valve 44 is installed. The pressure line 43 of the additional pump 6 by means of the pipe 45 and chokes 46 is connected to the channel s control 48, 49 dual stream pump 5. The control channel controls the supply of hydraulic fluid in the pressure line 14 and connected to the distributor 9 and the control channel 49 controls the flow of hydraulic fluid in the pressure line 15 and connected to the two-way two position valves 8.

Управление распределителями 8 и 9 осуществляется при помощи подпружиненного рычага 50, взаимодействующего с роликом, 51, смонтированным на балке 52, перемещение которой обеспечивается штоками 1 и 2 гидроцилиндров 3 и 4. Насосы 5 и 6 приводятся в действие электродвигателем 53.The control valves 8 and 9 are carried out using a spring-loaded lever 50, interacting with a roller 51 mounted on a beam 52, the movement of which is provided by the rods 1 and 2 of the hydraulic cylinders 3 and 4. The pumps 5 and 6 are driven by an electric motor 53.

Система синхронизации штоков двух гидроцилиндров работает следующим образом.The synchronization system of the rods of two hydraulic cylinders is as follows.

При включении электродвигателя 53 рабочая жидкость от насоса 5 по напорным магистралям 14 и 15 и через предохранительно-разгрузочный клапан 27, а от дополнительного насоса 6 по магистрали 43 и предохранительный клапан 44 поступает на слив.When the motor 53 is turned on, the working fluid from the pump 5 along the pressure lines 14 and 15 and through the safety-unloading valve 27, and from the additional pump 6 along the line 43 and the safety valve 44 enters the drain.

Рабочий ход штоков 1 и 2 осуществляется включением электромагнитов 30 и 37. Электромагнит 30 обеспечивает переключение разгрузочного клапана 27 и разобщение напорных магистралей 14, 15 со сливом, а электромагнит 37 переключает распределитель 36, вследствие чего рабочая жидкость под давлением поступает в полости управления 31, 32 нормально закрытых распределителей 19, 20 и’открывает их. Рабочая жидкость от насоса 5 по магистрали 14 через распределитель 20 и магистраль 17 подводится в поршневую полость 13 гидро цилиндра 4, а по магистрали 15 рабочая жидкость от насоса 5 через распределитель 19 и магистраль 16 подводится в поршневую полость 12 гидроцилиндра 3.The stroke of the rods 1 and 2 is carried out by turning on the electromagnets 30 and 37. The electromagnet 30 switches the discharge valve 27 and disconnects the pressure lines 14, 15 with a drain, and the electromagnet 37 switches the distributor 36, as a result of which the working fluid under pressure enters the control cavity 31, 32 normally closed distributors 19, 20 and 'opens them. The working fluid from the pump 5 through line 14 through the distributor 20 and the line 17 is supplied to the piston cavity 13 of the hydraulic cylinder 4, and along the line 15 the working fluid from the pump 5 through the distributor 19 and the main line 16 is supplied to the piston cavity 12 of the hydraulic cylinder 3.

При этом штоки 1 и 2 перемещаются, и рабочая жидкость из штоковых полостей 10 и 11 вытесняется в поршневые'полости 13 и 12 гидроцилиндров 3 и 4.In this case, the rods 1 and 2 are moved, and the working fluid is displaced from the rod cavities 10 and 11 into the piston cavities 13 and 12 of the hydraulic cylinders 3 and 4.

Опережение, например, штоком . 1 гидроцилиндра 3 штока 2 гидроцилиндра 4 приводит к следующему: ролик 51 нажмет на подпружиненный рычаг 50, который переместит золотник распределителя 8, и в канале управления 49 давление увеличится; из штоковой полости 10 поступит в поршневую полость 13 больший объем жидкости, чем из штоковой полости 11 в поршневую полость 12. Увеличение давления в канале управления 49 ведет к уменьшению подачи рабочей жидкости от насоса 5 по напорной магистрали 15 в поршневую полость 12 гидроцилиндра 3.Leading, for example, by stock. 1 of the hydraulic cylinder 3 of the rod 2 of the hydraulic cylinder 4 leads to the following: the roller 51 will press the spring-loaded lever 50, which will move the spool of the valve 8, and the pressure in the control channel 49 will increase; from the rod cavity 10, a larger volume of liquid will enter the piston cavity 13 than from the rod cavity 11 into the piston cavity 12. An increase in pressure in the control channel 49 leads to a decrease in the supply of working fluid from the pump 5 along the pressure line 15 to the piston cavity 12 of the hydraulic cylinder 3.

В результате этого происходит выравнивание скоростей штоков 1 и 2 гидроцилиндров 3 и 4.As a result of this, the speeds of the rods 1 and 2 of the hydraulic cylinders 3 and 4 are equalized.

В случае опережения штоком 2 гидроцилиндра 4 штока 1 гидроцилиндра 3 выравнивание их скоростей перемещения происходит аналогично.In the case of the lead of the rod 2 of the hydraulic cylinder 4 of the rod 1 of the hydraulic cylinder 3, the alignment of their speeds is similar.

При достижении балкой 52 крайнего нижнего положения электромагнит 37 выключается, а электромагнит 38 включается, что приводит к соединению полостей 31, 32 распределителей 19, 20 со сливом и подводу давления рабочей жидкости в полости управления 39, 40 дополнительных распределителей 23, 24, в результате чего рабочая жидкость поступает только в штоковые полости 10, 11 гидроцилиндров 3, 4 (по магистралям подачи 14, 15) слив жидкости из порш·» невых полостей 12, 13 происходит по магистралям 16, 17, 21, 22.When the beam 52 reaches its lowest position, the electromagnet 37 is turned off, and the electromagnet 38 is turned on, which leads to the connection of the cavities 31, 32 of the valves 19, 20 with the drain and the supply of working fluid pressure in the control cavity 39, 40 of the additional valves 23, 24, as a result of which the working fluid flows only into the rod cavities 10, 11 of the hydraulic cylinders 3, 4 (along the supply lines 14, 15), the liquid is drained from the piston of the “12” cavities 12, 13 along the lines 16, 17, 21, 22.

При достижении балкой 52 крайнего верхнего положения электромагниты 30 и 38 выключаются, а элементы системы занимают первоначальное положение.When the beam 52 reaches its highest position, the electromagnets 30 and 38 are turned off, and the elements of the system occupy their original position.

Предложенная система позволяет рао ширить диапазон рабочих нагрузок испол- . нительных органов с сохранением устойчивости их работы.The proposed system allows rao to expand the range of workloads used. body organs while maintaining the stability of their work.

Claims

(54) SYNCHRONIZATION SYSTEM OF TWO HYDROCILINDER RODS The invention relates to the synchronization systems of the movement of the actuators of various machines and can be used, for example, to provide synchronization of the movement of the sliders of hydraulic press brakes and knife beams of hydraulic sheet shears. The known synchronization system of the rods of two hydraulic cylinders driven by a regulated double-flow pump connects an additional pump, a synchronization unit with two-way two-way distributors, drain lines, as well as pressure lines connecting the opposing piston and rod cavities of the hydraulic cylinders with an adjustable double-flow pump 1. The disadvantage of this system is that when used as part of sheet shears with an inclined knife, i.e. in the case of moving the work load point along the blade beam at the working stroke, it does not ensure the steady movement of the executive bodies. The aim of the invention is to expand the range of workloads while maintaining stable operation of the executive bodies. This is achieved by the fact that normally closed valves are installed in pressure lines, the piston cavities of hydraulic cylinders with drain lines are installed in which additional normally closed valves are installed. The drawing shows a schematic diagram of the described system for synchronizing the rods of two hydraulic cylinders. The system provides synchronization of the movement of the rods 1 and 2 of the hydraulic cylinders 3 and 4 and includes an adjustable double-flow pump 5, an additional pump 6, a synchronization unit 7 with two-way distributors 8, 9. The hydraulic cylinders 3 and 4 have pin 10, 11 and piston 12, 13 cavities. The pressure lines 14, 15 of the double-flow pump 5 connect the opposite cavities 10, 13 and 11, 12 hydraulic cylinders 3 and 4. The working fluid is drained through the lines 16, 17, 18. In the pressure lines 15, 14, normally closed distributors 19 are installed. , 20, connecting piston cavities 12, 13 of hydraulic cylinders 3, 4 with lines 16, 17. In drain lines x 21, 22 communicated with lines 16, 17 through piston cavities 12, 13 of hydraulic cylinders 3, 4, additional normally closed ones are installed distributors 23, 24. Pressure lines 14, 15 of pump 5 are connected by pipelines with gadgets 25, 26 with safety-unloading valve 27 through check valves 28, 29. Safety-unloading valve 27 is controlled by an electromagnet 30. Control cavities 31 ,. 32 distributors 19, 20 lines 33, 34, 35 are connected to a three-position four-way distributor 36, which is controlled by electromagnets 37, 38. Control cavities 39, 40 additional distributors 23, 24 are connected via pipeline 41 to distributor 36, input which pipe 42 is connected to the pressure line 43 of the additional pump 6, in which the safety valve 44 is installed. The pressure line 43 of the additional pump 6 is connected to the control channels 48 by means of the pipe 45 and throttles 46, 47, 49 double-flow pump 5. The control channel 48 regulates the flow of working fluid in the pressure line 14 and is connected to the distributor 9, and the control channel 49 regulates the flow of working fluid in the pressure line 15 and is connected to the two-way two-way distributor 8. The control of the distributors 8 and 9 is carried out the aid of a spring-loaded lever 50 interacting with a roller 51 mounted on a beam 52, the movement of which is provided by rods 1 and 2 of hydraulic cylinders 3 and 4. Pumps 5 and 6 are driven by an electric motor m 53. The synchronization system of rods of two hydraulic cylinders operates as follows. When the motor 53 is turned on, the working fluid from the pump 5 is through the pressure line m 14 and 15 and through the safety-unloading valve 27, and from the additional pump 6 through the line 43 and the safety valve 44 enters the drain. The working stroke of the rods 1 and 2 is carried out by turning on the electromagnets 30 and 37. The electromagnet 30 switches the discharge valve 27 and separates the pressure lines 14, 15 with a drain, and the electromagnet 37 switches the valve 36, as a result of which the working fluid under pressure enters the control cavities 31, 32 normally closed distributors 19, 20 and opens them. The working fluid from pump 5 via line 14 through distributor 20 and line 17 is supplied to the piston cavity 13 of hydraulic cylinder 4, and through line 15, the working fluid from pump 5 through valve 19 and line 16 is supplied to piston cavity 12 of hydraulic cylinder 3. At the same time, rods 1 and 2 are mixed, and the working fluid from the rod cavities 10 and 11 is displaced into the piston cavities 13 and 12 of the hydraulic cylinders 3 and 4. Advance, for example, with the rod. 1 of the hydraulic cylinders 3 of the stem 2 of the hydraulic cylinders 4 leads to the following: the roller 51 presses the spring-loaded lever 50, which moves the valve of the distributor 8, and the pressure increases in the control channel 49; a larger volume of fluid enters the piston cavity 13 from the piston cavity 10 than from the rod end 11 into the piston cavity 12. Increasing the pressure in the control channel 49 leads to a decrease in the supply of the working fluid from the pump 5 via the discharge line 15 to the hydraulic cylinder 12 cavity 3. In As a result, the speeds of the rods 1 and 2 of the cylinders 3 and 4 are equalized. In the case of the advance of the rod 2 of the hydraulic cylinders 4 and the rods 1 of the hydraulic cylinders 3, the equalization of their speeds of movement occurs similarly. When the beam 52 reaches its lowest position, the electromagnet 37 is turned off, and the electromagnet 38 is turned on, which leads to the connection of the cavities 31, 32 of the valves 19, 20 with the drain and supply of pressure of the working fluid in the control cavity 39, 40 of additional valves 23, 24, resulting in the working fluid enters only the rod end cavities 10, 11 of the hydraulic cylinders 3, 4 (through the supply line 14, 15) the liquid is drained from the piston, and the remaining cavities 12, 13 occur along the line 16, 17, 21, 22. When the beam 52 reaches the outermost top position electromagnet Items 30 and 38 are turned off, and system components are in their original position. The proposed system allows you to expand the range of workloads using-. The invention is a synchronization system for the rods of two hydraulic cylinders driven by an adjustable double-flow pump, containing an additional pump, a synchronization unit with two-way two-way distributors, drain lines and pressure lines connecting the opposite piston and rod cavities of hydraulic cylinders with adjustable double-flow pump, characterized in that, in order to extend the range of workloads while maintaining stable operation enforcement agencies, in the pressure line x set normally closed valves, informing piston cavities of hydraulic cylinders with return line E, in which whisker-j tanovleny further normally closed valves. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 514510, cl. F 15 B 11/22, 1976.