SU1525351A1 - Hydraulic cylinder - Google Patents

Abstract

The invention relates to the field of mechanical engineering, in particular to a hydraulic drive, and can be used in power and damping hydraulic devices, for example, for process equipment. The purpose of the invention is to improve the dynamic braking performance and enhance the functionality. This is achieved by the fact that in a hydraulic cylinder with a device for damping at the end of the stroke by an elastic interaction of the piston with a spring-loaded spool, which forms a variable-flow choke with a cover between the piston cavity and the drain line, the spool is equipped with two membranes of different diameters fixed in the cover, the cavity between which is connected with drain line through the check valve and series-connected adjustable pressure valve and throttle. 1 hp f-ly, 1 ill.

Description

The invention relates to mechanical engineering, in particular to a hydraulic actuator, and can be used in power and damping hydraulic devices, for example, for technical logic equipment.

The purpose of the invention is to improve the dynamic characteristics of braking and the expansion of functional capabilities.

On Che) Gege is depicted constructive scheme of the proposed device.

In case 1 piston 2 is placed with 1 PTKO 3, in cavity 4 of which spring 5 is installed, held by I diiKH 6. In slider 7 installed in cavity 4, holes 8 are made through which the latter communicates with piston axis 9. The cover 10 is installed gold-H.iK 11, equipped with membranes 12 and 13, fixed in the cover 10 with the formation of the cavity 14. The cavity 14 through the series-connected adjustable pressure valve 15 and the adjustable choke 16, as well as through the check valve 17 is connected to the drain line 18. Cavity 9 communicated with the master Lew 18 through the holes 19 located on the surface kryipki 10, covered by the spool I 1. The cavity 9 is also communicated through the hole 20 with the cavity 21, separated from the cavity 14 by the membrane 13, the effective area of which is less than the area of the membrane 12, and equal to the area in plan the spool 11, which is affected by the pressure arising in the cavity 9. Between the spool 1 1 and the lid 10 a spring 22 is installed with an adjusting screw 23.

The device works as follows.

When the piston 2 moves, the liquid from the cavity 9 is displaced through the holes 19 into the line 18. In this case, the pressure of the liquid acting on the valve 11 in the axial direction is compensated by the pressure in the cavity 21 acting on the membrane 13. When the spool 1 1 contacts the slide 7, the last displaced along the bore 4, compressing the spring 5. Since the cavity 14 is locked, the force of the compressible spring 5 will create an increase in pressure in this cavity

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Claims (2)

Claim 1. A hydraulic cylinder comprising a housing with a cover and a piston with a rod installed in it, a shock absorber in the form of a spring-loaded slider and a damping device equipped with an adjustable pressure valve in the form of a spring-loaded spool installed to interact with the cover to form a variable-area throttle between the piston cavity and drain line, characterized in that, in order to improve the dynamic braking characteristics and expand the functionality, the spool is equipped with two I have membranes of different diameters fixed in the lid, the cavity between which is connected to the drain line through a non-return valve and the mentioned pressure valve and an adjustable throttle are connected in series. 2. The hydraulic cylinder according to π. 1, characterized in that the slider of the shock absorber is placed in the cavity of the rod. Cm Havitel In Yakovenko