SU1384842A1 - Hydraulic power cylinder - Google Patents

Abstract

The invention relates to mountain ridge, namely, to power hydraulic cylinders for driving shields, hydraulically supported supports. The purpose of the invention is to increase the speed of discharge. The power cylinder contains a piston installed in cylinder 1 with two rigid parts 7 and 8 connected by an elastic annular element 9. The rigid part 8 is connected to the rod 5, and part 7 is made in the form of a ring that surrounds the rod 5 displaceably along it. When the working fluid is supplied to the piston cavity 12, the elastic ring element 9 is straightened, the movable rigid part 7 moves along the rod 5, an annular gap 14 is formed between the cylinder I and the piston to transfer the fluid from the piston cavity 13 into the rod 15 and the piston with the rod under the action of the load instantly descends. In this way, the discharge rate is increased. 2 Il. with S cl

Description

2 IS 13 83 W 121110 57 / J

FIG. one

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The invention relates to the mining industry, namely to power hydraulic cylinders for driving shields, hydraulic roof supports, devices for holding conveyors, and can be used in any technical field.

The purpose of the invention is to increase the speed of discharge.

FIG. 1 shows a power cylinder; in fig. 2 - piston at the time of unloading.

The power cylinder contains a cylinder 1 with an attached bottom 2, a guide sleeve 3 with a monogogger sealing ring 4 to seal the rod 5, the guide sleeve 3 is clamped in the cylinder 1 by means of a nut 6. The piston of the cylinder includes rigid parts 7 and 8 connected by an elastic ring an element 9 which presents a multi-ring with intermediate rigid metal rings 10. The rod 5 is fixed to the lower rigid part 8 and has a channel 1 for supplying the working fluid to the piston cavity 12. The second (top) hard part 7 is made in I

a ring covering the stem 5 s

possibility of displacement along it. The hard part 8 is located on the side of the piston cavity 13 of the hydraulic cylinder. The diameter of the hard parts 7 and 8 is significantly less than the diameter of the inner surface of the cylinder 1.

The annular elastic element 9 is placed between two rigid parts 7 and 8 with the possibility of forming an annular gap 14 between the piston and the inner surface of the cylinder for transferring fluid from the piston cavity 13 to the rod 15 when unloading is thus a discharge means.

The lower rigid part 8 of the piston can be connected to the bottom 2 by a flexible piston stroke limiter 16, the length of which is chosen from the condition so that it is possible to push the piston towards the guide sleeve 3.

The rod 15 and piston 13 cavities of the power hydrocylinder have fittings for the supply of liquid, and the bottom 25 - the guide sleeve 3 with the cylinder has a seal (not shown).

Power cylinder works as follows.

Fluid is supplied to the piston cavity I3 to implement the expansion of the hydraulic cylinder when it is operated in porridge.

hydraulically mechanized lining. To unload the hydraulic cylinder, the working fluid is supplied through the channel P into the cavity 12 of the piston. As a result, the lero annular elastic element 9 is expanded under the influence of increasing pressure, and the piston is pushed towards the guide sleeve 3, moving the rigid 5 with the rod 5 . Between

an annular gap 14 is formed by the cylinder 1 and the piston due to a decrease in the diameter of the annular elastic core 9, i.e. pistons Through the annular gap 14 fluid flows from

the piston cavity 13, and the piston with the rod is instantly lowered under the action of the load.

Thereafter, channel 11 is connected

with the drain and the piston under the action of elastic forces and the annular elastic element 9 returns to its original position, with the result that the annular elastic element 9 enters

interaction with the inner surface of cylinder 1 and covers the rod 15 and piston 13 cavities.

The piston can be extended by any other mechanism.

spread out

Bypassing the working fluid from the piston cavity to the rod will occur automatically with increasing pressure in the piston cavity,

if the annular elastic element 9 is installed with a certain selected stiffness and elasticity in designed to hold a certain load from the roof. By increasing

the pressure in the piston cavity 13, the annular elastic element 9 will begin to expand, since due to the rigid attachment of the rod 5 to the lower rigid part 8 and its abutment into the roof, the piston will not be able to compress. In this case, the upper rigid part 7 will be displaced relative to the rod 5.

As a result of the use of the proposed hydroscher, the discharge speed is determined, since it does not depend on the performance of the safety and distribution hydraulic equipment.

Claims (1)

Invention Formula A hydraulic cylinder containing a cylinder, a piston with two rigid parts, a rod connected to one of the rigid parts, a discharge device for transferring fluid from the piston cavity into the rod one with an annular elastic element connected with rigid parts forming an annular gap between the piston and the inner surface of the cylinder, characterized in that, in order to increase the discharge speed, the rigid part of the piston connected to the rod is located on the side of the piston one, and the second rigid part is made in the form of a ring covering the rod with a possibility of displacement along it S 9 / U / L // A / LH /. u 1 v 57 40 fug. 2