SU111930A1 - Hydraulic actuator to rotate the jetting shaft - Google Patents

Description

The subject of the invention is a hydraulic actuator for rotating the barrel of a hydromonitor using a servo motor with a slide valve moved by means of a remote hydraulic transmission with feedback.

Known hydraulic drives of this type are bulky and little convenient to use.

A distinctive feature of the described hydraulic drive, designed to rotate the shaft of the jet monitor, is the implementation of feedback using an eccentric and tie to the body of the remote hydraulic transmission receiver.

Such a hydraulic design makes it more compact and convenient to operate.

The drawing shows a diagram of the described hydraulic drive, the power part of which is a hydraulic cylinder / with piston 2 and a crankshaft group 5. The crank 4 is mounted on the butt of the diverging elbow 5 of the jetting shaft, the rotation of which drives it.

Fitted on the eccentric collar 6, the holder 7 is pivotally connected with the clamp 8 with the cross-bar of the bellows receiver 9.

The transmission of control pulses over a distance is carried out by means of a working fluid, for which the bellows-setting device 10 is connected to the bellows-receiving 9 by means of a hose //.

. The reference bellows 10 is connected to the control handle 12, the rotation of which is performed by reducing or increasing the length of the bellows, as well as the corresponding change in the volume formed by the bellows.

The pressure of the working fluid — engine oil — is created by a pump 13 driven by a hydro-turbine 14, the working fluid of which uses a portion of the water supplied to the jet monitor. The oil is injected into the hydraulic cylinder / through the spool / 5, the cavity of which is connected by means of a tube 16 with the discharge cavity of the pump 13 and a tube 17 with a reservoir 18 for draining oil into it. Oil from the injection number 1119M- 2 -

The pressure tube 16 can be reset by the release valve /.9 if necessary.

The effect of the hydraulic drive is that by turning the handle 12, a compression of the bellows / O is caused, in which the oil flows into the bellows 9, the length of which increases accordingly. Since the end wall of the bellows 9 is rigidly connected to the spool 15, it follows. Telpo, it will then be moved by the amount of elongation of the bellows. Under the action of the pressure of the liquid, the piston 2 will move in the direction of the arrow shown in the diagram. Moving the piston 2 in turn will cause the crank 4 to rotate, and with it the jetting shaft.

As the crank 4 rotates, the hinge 20 will move, by means of which the yoke 7 is connected to the feedback shaft 8. In the results, the spool 15 will move in the opposite direction, which is given to it by the handle / 2 controls. At the moment when the slide valve overlaps the channels of the pipelines 16 and / 7, it will assume a neutral position corresponding to the elongation or shortening of the bellows 9.

Thus, any movement of the control knob 12 causes a proportional change in the length of the receiving bellows 9, and with it the movement of the spool / 5, and the channels open in such a sequence that the mechanism performs the next movement after half of the spool, working it to the neutral position.

Leaks that occur in the hydraulic cylinder system, due to the presence of feedback, do not disrupt the operation of the hydraulic drive.

In addition to bellows, diaphragms can be used to transmit control pulses, and any motor as a pump drive.

Subject invention

A hydraulic actuator for rotating the barrel of a hydromonitor using a servo motor with a slide valve moved by remote hydraulic transmission and returned to the initial position by means of feedback, characterized in that, in order to simplify the design, the feedback link is carried out using an eccentric and tie to the receiver body remote hydraulic transmission.

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