SU1423819A1 - Hydraulic positioner - Google Patents

Abstract

Invention m. used to move executive bodies. The purpose of the invention is to reduce the size and increase the reliability of the hydraulic positioner. In the cylinder 1, the discharge pistons (P) 2, 3 are sequentially placed. 4. 5. Forming the working and returning chambers 6, 7, 8, 9. The damping device is made in the form of an additional P 15 installed in the working chamber 6 P 2 younger category. P 2, 3, 4, 5 are made with the ability to interact through the rods 11, 12, 13, each of which is placed in the bore of the next P P 15 concentrically installed in P 2. The bores 27, 28, 29 are made stepwise. The throttle is installed inside the П 15, check valves in the rods 11, 12, 13, to-rye with steps form damping cavities. 4 il. G e

Description

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The invention relates to a cij-poeHHra machine, in particular a k-hydraulic-KIJEM device for moving actuators from one sex to another.

i The purpose of the invention is to reduce habfrits and increase the reliability of the hydraulic P0 positioner.

I FIG. 1 shows the principles of a41 device diagram; FIG. 2- 1 in fig. one; in fig. 3 shows the node I in FIG. one; in fig. 4 - node III on f; g1g. one.

i The hydraulic positioner contains a cylinder And with successively placed in the discharge pistons 2-5, forming the working and return chambers 6 {and 10. The pistons 2-5 are made with the possibility of interaction with the help of plugs 11-13, and the piston 5 is equipped with an outlet rod 14 In addition, the hydraulic positioner includes a damping device, made in the form of an additional piston 15 installed in the working chamber 6 of the piston 2, the low-order piston 15, check valves 16-18

(Fig. 2-4) and choke 19 (Fig. 2). The cylinder 15 interacts with the piston by means of the spring 20 (Fig. 2) ijt has a latch position, is made in the form of a sleeve 21, the channels 22 and 23 j act to the adjustable throttle 19

Possible through the hole 24 in Krshka 5, closed with a stopper 26. In the rods 11-13 posted check valves 17 (Fig. 3). Pistons 3–5 are equipped with steps with openings 27–29 (Fig. 1), and with these, the rods 11–13 form damping cavities 31 with steps of 30 (Fig. 3) of smaller diameter. The channel 32 is made in the cylinder |

The hydraulic works as follows. .

When the working fluid is supplied to chamber 10 and 6, the pistons 3-5 begin to move to the left (Fig. 1), and the rod 11 moves inside the piston 3, displacing the working fluid from the cavity 31 through the annular gap. This clearance is reduced towards the end of the stroke of the piston 3, which causes its damping at the end of the stroke. Similarly, it dried out, damping pistons 4 and 5 when

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move them to the left. When connected to the drain of chamber 6, the piston 2 begins to move to the left, while the piston 15, remaining in place, simultaneously compresses the spring 20 and forces the fluid through the channel 23, the flow area of which is limited by the throttle 19. The piston 2 is prevented about the cutout 25. When the pistons move 2-5 to the right, the piston 5 with the rod 14 is damped by displacing the working fluid from the chamber 10 through the annular gap between the piston 5 and the housing 1 into the channel 32, the damping force being determined by this gap.

The check valves 16-18 are designed to allow the working fluid to flow unhindered into chambers 6 and 10 and cavities 31 as pistons 2-5 move.

The fixing of the positions of the piston 15 and the throttles 19 is carried out by. bushings 21 j installed in channel 23.

The technical and economic effect of the proposed device consists in expanding the field of its application.

Claims (1)

Invention Formula A hydraulic positioner containing a cylinder with sequentially arranged discharge pistons in it, forming working and returning chambers, a damping device, fulfilled in the form of an additional piston installed in the working chamber of the lower-order piston, check valves and chokes, while the discharge pistons are made with the possibility of interaction through rods, each of which is placed in the bore of the subsequent piston, which is different in that, in order to reduce overall dimensions and increase reliability, the additional piston concentrically mounted in the piston least significant bit, bore vsholneny stupenchatgmi, wherein the choke is mounted within said piston return valves - in the discharge rods and pistons in the additional piston and the rods form at in steps of a smaller diameter dempfiruk que cavity, FM.3 fg Figm