SU473352A3 - Double action hydraulic jack - Google Patents

Description

The stepped plunger moves relative to the housing in a nanravl jup; these with seals 15 and 16. The hollow piston 11, in turn, has a direction with the seals 17, which slides along the hollow rod 9. Prp dvngenip it moves the stepped plunger, having Thereby, the limited possibility of psempore1; it is relative to the latter due to the gap 18. Between the thin-walled casing 7 and the sleeve 6 there is formed a cavity 19, filled with a damping fluid, which with the help of the holes 20

The device,; o for-plunger speed, the upper position, has a droplet 23 for supplying the working fluid, communicating with two channels; 24 and 25 in the housing of the jack. Moreover, with channel 25 kaia; 1 23 is communicated through a one-sided phossel, which is volatile in the form of a non-return valve 26 with a spring 27, unified and uncaged with a facet 28, into the body of the device 5.

The return claian 26 has an orifice 29 for the backward passage of the working fluid, a cosG11 and a hole 30 for the forward flow of fluid.

In the upper position of the stunted ylunger 2, kiaal 24 is not covered by the corner of the pluilser, the graiii of which passes but thorii31.

Hydraulic ram works as follows.

np; i at the inlet of the working fluid under pressure through kak 10 into the lower working cavity 13 of the jack, the hollow piston II moves upwards but the hollow rod 9, which is moved by the stepped grab 2.

From the upper working cavity 4 of the housing but the channels 24, 25 and 23, the liquid is displaced to the slings. According to iMcpe of the moving unit 2 of the plower 2, through the holes 21 and 20, the damping of the depreciation cavity 22 occurs, with the fluid sinking from the cavity 19.

When approaching X, the upper position of the downloader 2 overlaps the channel 24, and the bottom 4 is wiped out only through the channel 25, the throttle hole 29 and the channel 23 to the drain.

In this case, when the plunger approaches the ver.hni-. his position is quenched.

When supplying the working fluid under daleipem to drip 23 and connecting the channel 10 to the drain, the plunger moves slowly downwards. The liquid at the same time from the channel 23, crimping the reversing valve 26, enters the upper working cavity 4 of the body. Upon further movement of the viiz of the stepped plunger, open the kial 24, through which into the cavity 4

Receives additional work

fluid. Thanks to this tolp increases

plunger speed.

As far as D1I) plunger down liquid

from the working cavity 3 is forced through the caia 10 to the drain, and from the damping bed 22 through the screw holes 20 and 21 into the cavity 19. With further downward movement, the plunger alternately closes these holes, thereby smoothly damping its speed when it approaches. position.

P r d d e m e and 3 o b e te n u

1. Double-acting hydraulic jack; and, containing a collapsible plunger with an internal racket, sliding in a fixed case, consists of a sleeve and a cover, equipped with channels for liquid iodide and devices for damping the speed of the jets /; the end of his turn, the n-i vypoliye: .1m with a number of holes in the sleeve, and one-sided throttles, about the fact that, for the purpose of simplifying 1 manufacturing of a jack, the blade is sabzhen hollow core, iio to which the working stand is 1dko, and in the bore of the stepped plunger Still, with the possibility (of a limited limited non-remegtse relatively relatively hollow hollow, with seals sliding along the outer surface of the hollow core.

2. Domkrat on n. 1, characterized in that the shell of the housing is provided with a thin-walled shell, the space between which is filled with a liquid, carrying out a greater speed of movement of the plunger when lowering it.

18

eight

(Put 1

ha

23

srig 2