SU615258A1 - Hydraulic lock - Google Patents

Description

(54) HYDRAULICS

This invention relates to the field of hydraulic nosepipes and can be used in such hydraulic actuators as their mechanized roof supports.

i A hydraulic lock is known, containing a cortus and a compacted, regarding the casing, a working element in the form of a stepped grab with an axial channel made from the side of a smaller diameter and one row of radial holes 41.

Dunnshadrozamok provides one clan pair in the inlet, safety and discharge mode.

The disadvantage of this hydraulic lock is the design complexity and impossibility 1 & Ryoeo pechenn large flow capacity in the mode of: pressure relief valve without significant increase in size.

The aim of the invention is to reduce the size and increase the capacity of the hydraulic lock.

The goal is achieved by the fact that the axial channel from the end, and in the working element, the second axial channel separating the first from the first partition separates the first axial channel, and a number of p / epinal radial holes, and one row of holes communicates with the cavity of the second axial channel, and the other two rows yes - with a cavity of the muffled axial canal.

The drawing shows the hydraulic lock, cut.

The hydraulic lock comprises a housing 1 and a plunger 2, which is sealed relative to the latter, which is made stepwise. In the plunger 2, the first axial channel 3 and the first row of radial holes 4 are executed on the side of smaller diameter and the smaller and smaller diameters of plunger 2 form a step 5 In the plunger 2, the first axial channel 3, which is muted at the end, is opposite, the second axial channel 6 is separated from the first partition 7, and two rows of additional radial holes 8 and 9. The holes 8 are communicated with the second axial channel scarlet 6, in which L etsy open, and the holes 9 - with the muffled axial channel 3.

Claims (2)

The plunger 2 is sealed relative to the body 1 by the Yun 11 seals. In the body 1 of the hydraulic lock, the channel 12 is in communication with the piston cavity of the hydraulic hose and the channels 13 and 14, which are normally connected to the drain. The plunger 2 is pressed against the spring in the case 1 of the spring Mi 15 and 16. A pusher 17 is located above the plunger 2. The hydraulic lock works as follows. In the mode of supplying the working fluid under pressure b to the piston cavity of the droppings, the fluid is supplied to channel 13. The pressure acts on the {schi plunger 2 and, due to the difference in their areas, the plunger moves to the extreme position against the stop. The fluid passes through the axial channel 6 and through the holes 8 enters the channel 12. When the pressure in the hydraulic piston strip reaches the head in channel 13, the plunger 2 under the effect of additional pressure on its annular step 5 and the force of the springs 15 returns to its original position. In the mode of withdrawing the wheel from the pimp-shaped cavity of the hydraulic post, the feed is fed into channel 14. The pressure acts on the mountaineer 17, which moves plunger 2 to such a position that a number of radial holes 8 extend beyond the limits of seal 11. Fluid from channel 12 through holes 4, The axial channel 3 and the holes 8 go to drain through the channel 13. When operating in the safety channel mode, the pressure from the hydraulic piston strip is transferred to the channel 12 and acts on the annular ledge 5 of the plunger 2. When the pressure reaches a certain limit, due to the tightening of the spring 16, the plunger 2 under the action of this pressure will begin to move, compressing the spring 16. When the holes 8 of the plunger 2 go beyond the limits of the seal I, the fluid will start to flow from the channel 12 through a row of radial holes 4 of the plunger 2, the axial channel 3 and a series of holes 8 in the channel 13 and further to the drain. Thus, the axial force on the plunger 2 does not depend on the size of the outer diameter of the plunger, but only on the difference in the diameters of the lower and upper cylindrical parts of the plunger, i.e. from the area of the annular ledge 5. Therefore, keeping the same size of the area of the annular ledge, you can increase the diameter of the plunger, thereby increasing the flow area. At the same time, the installation of a more powerful spring 16 will not be required. The present invention allows to reduce the weight, size and cost of manufacturing the main body and increase the capacity of the safety valve. Claim Formula; containing a housing and a working element compacted relative to Koimyca in the form of a stepped plunger with an axial channel made on the side of a smaller gauge, and with a number of radial holes, which is hampered by the fact that, in order to reduce overall dimensions and increase throughput, the valve, the axial channel is plugged from the end, and in the working element there is a counter-1urvok1u second axial channel, separated from the first by a partition, and two rows of additional radial holes, one p The holes are communicated with the cavity of the second axial channel, and the lugs are two rows with the cavity of the muffled, axial channel. Sources infrm: 1ShSh, Taken into account during the examination: 1. USSR Copyright Certificate № 467203, cl. F 16 K 17/10, 1975. Af