SU954651A1

SU954651A1 - Power hydraulic cylinder

Info

Publication number: SU954651A1
Application number: SU813241122A
Authority: SU
Inventors: Виктор Федорович Логинов; Павел Иванович Аболь; Риза Люманов; Абрам Соломонович Залкинд; Григорий Иванович Семенов
Priority date: 1981-01-26
Filing date: 1981-01-26
Publication date: 1982-08-30

Description

(54) СИЛОВОЙ ГИДРОЦИЛИНДР(54) POWER HYDROCILINDER

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Изобретение относитс к гидравлическим механизмам и может быть использовано дл привода рабочих органов машин, в частности дл подъема стрель лесозаготовительной машины и поворота ее звеньев.The invention relates to hydraulic mechanisms and can be used to drive the working bodies of machines, in particular for lifting the boom of a logging machine and turning its links.

Известен силовой гидроцилиндр, содержащий корпус, шток, два поршн , один из которых установлен на штоке с возможностью осевого перемещени , диски с дросселирующими каналами и обратными клапанами и компенсатор ударных нагрузок I.Known power cylinder, comprising a housing, a rod, two pistons, one of which is mounted on the rod with the possibility of axial movement, discs with throttling channels and non-return valves and a shock load compensator I.

Однако гидроцилиндр не может снижать динамические нагрузки на штоке, когда шток находитс в одном из крайних своих положений (максимально выдвинут или вт нут),а поршень соприкасаетс с одной из крышек, что снижает надежность работы гидроцилиндра .However, the hydraulic cylinder cannot reduce the dynamic loads on the rod when the rod is in one of its extreme positions (maximally extended or retracted), and the piston is in contact with one of the covers, which reduces the reliability of the hydraulic cylinder.

Цель изобретени - повышение долговечности гидроцилиндра.The purpose of the invention is to increase the durability of the hydraulic cylinder.

Указанна цель достигаетс тем, что шток снабжен внутренней полостью, в которой размещен компенсатор ударных нагрузок , каждый диск жестко закреплен на одном из поршней, причем поршень, установленный с возможностью перемещени относительно щтока, выполнен больщего диаметра , установлен концентрично относительно другого поршн , жестко св занного со штоком, и снабжен дополнительным штоком, расположенным в полости основного щтока и взаимодействующим с последним через компенсатор ударных нагрузок.This goal is achieved by the fact that the rod is provided with an internal cavity in which the shock load compensator is placed, each disk is rigidly fixed on one of the pistons, and the piston mounted for movement relative to the rod is of larger diameter, mounted concentrically relative to the other piston rigidly connected with a rod, and provided with an additional rod located in the cavity of the main shaft and interacting with the latter through a shock load compensator.

При этом компенсатор ударных нагрузок выполнен в виде подпружиненного дополнительного поршн , установленного с возможностью осевого перемещени относило тельно основного и дополнительного штоков .In this case, the shock load compensator is made in the form of a spring-loaded additional piston mounted with the possibility of axial movement relative to the main and additional rods.

Кроме того, обратные клапаны каждого из дисков снабжены общим запорным элементом из эластичного материала.In addition, the check valves of each of the discs are equipped with a common locking element made of elastic material.

На фиг. I показан силовой гидроцилиндр, 15 разрез, при отсутствии на штоке динамических усилий; на фиг. 2 - то же, при действии динамических усилий, выдвигающих щток; на фиг. 3 - то же, при сн тии динамических усилий, выдвигающих щток; на - фиг. 4 - то же, при действии динамических усилий, вталкивающих щток; на фиг. 5 - то же, при сн тии динамических усилий, вталкивающих щток.FIG. I shows the power cylinder, 15 section, in the absence of dynamic forces on the rod; in fig. 2 - the same, under the action of dynamic forces pushing the jaws; in fig. 3 - the same, with the removal of dynamic forces pushing the jaws; in FIG. 4 - the same, under the action of dynamic forces pushing the jaws; in fig. 5 - the same, with the removal of the dynamic forces pushing the jaws.

Claims

The power cylinder includes a housing 1, a brush 2, provided with an internal cavity 3. two pistons -4 and 5, the first of which, mounted on the rod 2 with axially displaceable, is made of a larger diameter, mounted concentrically relative to the piston 5, rigidly connected with a rod 2, and provided with an additional rod 6 located in the cavity 3 of the main rod 2. The additional rod 6 interacts with the main rod 2 by means of a shock load compensator installed in the cavity 3 and made in the form of an additional piston 7, of the ginned disc springs 8. The additional piston 7 is mounted for axial movement relative to the rods 2 and 6. In the rod 6, throttling channels 9 are made, and in the piston 5 are throttling channels 10. The disks are made together with pistons 4 and 5, and the reverse ones valves 11 and 12 of each disc are equipped with a single locking elements 13 and 14 of elastic material. Power cylinder works as follows. Let the impact load S be directed as shown in FIG. 2. At the same time, the piston 4, resting on the working fluid or on the front cover of the hydraulic cylinder (not shown), the additional rod 6 connected with it will remain stationary, and the rod 2 of the hydraulic cylinder together with the piston 5 and the piston 7 of the shock load compensator compressing the cup springs 8 will move to the left position (according to the drawing). The impact energy is transferred to the compression energy of the disc springs 8. During movement to the left position (according to the drawing), the working fluid through the throttling channels 9 and the check valves 12, opening element 14, fills the resulting volume Vi (Fig. 2). When the shock load ceases to act (Fig. 3), the springs 8 return the cylinder 2 brush and the additional piston 7 to the initial position. In this case, the working fluid from the volume V) flows only through the throttling channels 9 in the additional rod 6 and absorbs the compression energy of the springs 8. Let the shock load S be directed as shown in FIG. 4, and the piston 4 is in one of its positions, including contact with the hydraulic cylinder back cover (not shown). At the same time, the additional piston 7, resting on the working fluid, remains stationary, and the piston rod 2 of the hydraulic cylinder together with the piston 5, compressing the cup springs 8, moves to the right position (according to the drawing). The impact energy is transferred to the compression energy of the plate springs 8. During movement to the right position (according to the drawing), the locking element 13 of the valves 11 is opened by the action of the working fluid and the latter fills the resulting volume V2 (Fig. 4). When the shock load ceases to act, (Fig. 5) the springs 8 return the cylinder 2 shafts together with the piston 5 to the initial position. The working fluid from the volume only flows through the throttling channels 10 in the fluid 5 and absorbs the compression energy of the springs 8. Since the disc springs 8 have a rigidity corresponding to the calculated static load, the effect of the device only takes place when the load exceeds the calculated . Otherwise, the device works like a normal hydraulic cylinder. The proposed hydraulic cylinder allows damping dynamic loads not only in the middle of the working stroke of the rod 2, but also in its extreme positions, which does not require additional devices. In addition, the execution of the hydraulic cylinder pistons together with the disks, and check valves for each of the disks with a single locking element simplifies the design. Claim 1. Power cylinder containing a housing, a rod, two pistons, one of which is mounted on a rod with the possibility of axial movement, discs with throttling channels and; check valves and a shock load compensator, characterized in that, in order to increase the durability of the hydraulic cylinder, the rod is provided with an internal cavity in which the shock load compensator is placed, each disk is rigidly fixed on one of the pistons, and the piston mounted for movement relative to the rod is made larger diameter, mounted concentrically with respect to another surface, rigidly connected with the brush, and provided with an additional brush located in the cavity of the main brush and interacting with the latter through a shock load compensator.

2. The hydraulic cylinder according to claim 1, characterized in that the shock load compensator is made in the form of a spring-loaded additional piston mounted for axial movement relative to the main and additional rods.

3. A hydraulic cylinder according to claim 1, characterized in that the check valves of each of the discs are provided with a common locking element of an elastic material. Sources of information taken into account in the examination 1. USSR author's certificate in application No. 2869897 / 25-06, cl. F 15 B 15/22, 1979.

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