RU1793093C - Hydraulic machine control member of automatic control system - Google Patents

Abstract

SUMMARY OF THE INVENTION: a command device is connected to a hydraulic piston servomotor with pressure and drain cavities. The main spool is connected to a pressure accumulator. The spool is installed between the main spool and the servomotor and connects in one of the cavity positions to each other and to the accumulator by the signal of the command device. The spool is made of three-position, connects in the third position of the servo motor cavity between itself and the drain. 1 ill.

Description

The claimed technical solution relates to hydraulic engineering and can be used in the design of control systems for hydraulic turbines, pump turbines and hydraulic locks.

| the invention is to increase the reliability of the system and reduce the flow of working fluid ..

the drawing shows the proposed systems

The control system of the regulatory body of the hydraulic machine contains a .1 pressure accumulator, a hydraulic piston servomotor 2 with pressure cavities 3, 4, and a drain

main 1st spool 8. The system is equipped with a three-position spool 9 installed between the main spool 8 and the servomotor 2 and connecting the cavities 3 and 4 of the servomotor 2 with each other and with accumulator p, i of phenomenon 1 or with a drain piping piston 5, with a rod 6 connected by a servomotor 2, a command device 7 and

house 10 (with a drain) at the signal of the command device 7.

The system operates as follows.

For example, the position of the regulatory body is closed ... When a signal is given for opening, in the initial section where the hydraulic moment for opening acts, the three-position spool 9 is moved to the leftmost position, while connecting the cavities 3 and 4 and the last through the main spool 8 with pressure accumulator 1. In this section, the opening is carried out due to the hydraulic moment on the opened

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arising in servomotor 2 and acting on the opening. In this case, the oil flows from the cavity 3 into the cavity 4. Having reached a zero value, the hydraulic moment subsequently acts on the closure. During this period, at the point where the hydraulic closing moment becomes equal to the moment

the force arising in the servomotor 2, at the signal of the control unit 7, the three-position spool 9 is moved to the middle position, while the main spool 8 connects the cavity 4 (for opening) with pressure accumulator 1 and the cavity 3 for closing) with the drain pipe 10. Then when the hydraulic moment approaches zero value at the point when the moment of force arising in the servomotor 2 exceeds the hydraulic moment of closure, the signal of the control unit 7 moves the three-position spool 9 to the extreme left position, connecting cavities 3 and 4 between themselves and with pressure accumulator 1. This position of the three-position spool 9 is maintained until the adjustable organ is fully open.

The position of the regulatory body is open. When a closing signal is given in the initial section, where the hydraulic moment for opening acts, the three-position valve 9 is moved to the middle position, then turn off the cavity 3 (for closing) with pressure accumulator 1 and cavity 4 (for opening) through the main valve 8 with drain line 10. When it reaches zero, the hydraulic moment subsequently acts on the closure. At this point, according to the signal of the command device 7, the three-position spool 9 is moved to the extreme right position, while connecting the cavities 3 and 4 with each other and through the main spool 8 with the drain pipe 10. The EDESLO flows from the cavity 4 into the cavity 3, and part oil, equal to o6veMy of rod 6, through a throttle (not shown) is discharged through a drain pipe 10. Then, at

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when the hydraulic moment is reached, the three-position spool 9 is moved to the middle position according to the signal from the control unit 7, while connecting the cavity 3 with pressure accumulator 1 and the cavity 4 to the drain pipe 10 using the main valve 8 the moment acts on the opening, and the position of the three-position spool 9 is maintained until the regulator is completely closed.

When the regulatory body is closed by means of a load (from the full opening position), a three-position valve 9 is moved to the leftmost position by a signal, while connecting the cavities 3 and 4 of the servomotor 2 with each other and through the main valve 8 with a drain pipe 10. Under the influence of the cargo (not shown) the regulator closes, and the piston 5 with the rod 6 of the servomotor 2 moves from the side of the cavity 3 to the side of the cavity 4. In this case, the working fluid flows from the cavity 4 into the cavity 3, and part of the oil is equal to the volume of the rod b. through the throttle drains through the drain pipe

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The technical advantage of the claimed technical solution compared to the prototype is to provide more control operations without pumping the working fluid (oil) into the pressure accumulator, which increases the reliability of the control system, as well as to reduce the oil consumption from the pressure accumulator, which helps to reduce the size oil pressure installation (MNU) and, therefore, reduce the metal consumption of the latter.

SUMMARY OF THE INVENTION A system for automatically regulating a tire hydro-regulator containing a pressure accumulator, hydraulic piston sulfur, a pump with pressure and drain cavities, a command device connected to it, a main valve connected to the pressure accumulator, and a valve installed between the main

a spool and a servomotor and connecting the water from the positions of the cavity of the latter to each other and to the Pressure accumulator according to the signal of the command device, characterized in that, in order to increase reliability and reduce the flow rate of the working fluid, the spool is made three-position, connecting in its third the position of the cavity of the servomotor between itself and with a drain.