SU981710A1

SU981710A1 - Double-channel distributing apparatus

Info

Publication number: SU981710A1
Application number: SU813299308A
Authority: SU
Inventors: Владимир Петрович Кузнецов; Юрий Алексеевич Медведев
Original assignee: Владимирский политехнический институт
Priority date: 1981-06-10
Filing date: 1981-06-10
Publication date: 1982-12-15

Description

Изобретение относитс к гидроав томатике и может быть использовано . в гидроприводах с двум гидродвигател ми и механическим дифференциалом дл регулировани частоты вращени нагрузки.The invention relates to hydromatics and can be used. in hydraulic drives with two hydraulic motors and a mechanical differential for controlling the frequency of rotation of the load.

Известно двухканальное распределительное устройство, содержащее два золотниковых дросселирующих распределител , соединенных каждый с полост ми одного из гидродвигателей, источником рабочей жидкости и сливом , и задающее устройство дл формировани сигнала управлени на торцах распределителей {.A two-channel distribution device is known, containing two spool-type choke distributors, each connected to the cavities of one of the hydraulic motors, a source of working fluid and a drain, and a driver for generating a control signal at the ends of the distributors {.

Недостатком известного распределительного устройства вл етс узость функцкоиальных возможностей из-за отсутстви св зи между золотниковыми распределител ми.A disadvantage of the known distribution device is the narrowness of the functional possibilities due to the lack of communication between the spool valves.

Цель изобретени - расширение функциональных возможностей.The purpose of the invention is to expand the functionality.

Указанна цель достигаетс тем, что золотники распределителей выполнены п типо сковыми, подпружинены трем пружинами и установлены в одной втулке с образованием двух крайних и одной центральной торцовых полостей, в каждой из которых разме-щена одна из пружин, а также восьмиThis goal is achieved by the fact that the spools of distributors are n-type, spring-loaded with three springs and installed in one sleeve with the formation of two extreme and one central end cavities, each of which has one of the springs, as well as eight

промежуточнЕлх камер, кажда из которых ограничена двум по сками одного и того же золотника, при этом крайн торцова полость каждого золот (Ника св зана с центральной через ближайшую к ней промежуточную камеру.intermediate chambers, each of which is bounded by two poles of the same spool, with the extreme end cavity of each gold (Nick is connected to the central via the intermediate chamber closest to it.

На фиг. 1 изображена схема двухканального распределительного устройства; на фиг. 2 - диаграмма час10 тот вращени гидродвигателей и нагрузки в зависимости от сигнала управлени .FIG. 1 shows a diagram of a two-channel switchgear; in fig. 2 is a diagram of the speed of rotation of the hydraulic motors and the load versus the control signal.

Распределительное устройство содержит два золотниковых распредели15 тел , состо щих из п типо сковых золотников 1 и 2, подпружиненных пружинами 3,4 и 5 равной жесткости и установленных во втулке 6 с образованием двух крайних торцовых полостей The distribution device contains two spool-distributing 15 bodies consisting of n types of spools 1 and 2, spring-loaded with springs 3,4 and 5 of equal rigidity and installed in sleeve 6 with the formation of two extreme end cavities

20 7,8 и центральной торцовой полости 9, а также восьми промежуточных камер 10-17, кажда из которых ограничена двум по сками одного и того же золотника. При этом крайн торцова 20 7.8 and the central end cavity 9, as well as eight intermediate chambers 10-17, each of which is limited to two in the same spool. In this case, extreme butts

Claims

25 cavity 7 of spool 1 is connected to the central end cavity) 9 through the intermediate chamber 10 nearest to it, and the extreme end cavity 8 of spool 2 through the intermediate chamber closest to it 17. Intermediate chambers 11 and 16 are connected with a drain, each intermediate chambers 12 and 15 - with a source of working fluid and one of the cavities of one of the rotation hydraulic motors (not shown), and each of the intermediate chambers 13 and 14 - with a drain and another cavity of the corresponding {idromotor, driving device for generating a control signal t 18 and 19 spools 1 and 2. In the form of a nozzle element, a damper valve having an electromechanical converter 20, a damper 21 nozzles 22 and 23 connected to cavities 7 and 8 and through chokes 24.25 in (throttle head 26 connected by an input source of working fluid. Hydraulic motors through mechanical differential are interconnected with each other and load (not shown). Pa6OTaet dual channel switchgear as follows In the initial position, when there is no control signal at the input of the electromechanical converter 20, the valve 1 and 2 are fixed. At the same time, the working fluid through chambers 12 and 15 goes to hydraulic motors, and through chambers 13 and 14 to the drain, and the hydraulic motors rotate at maximum speeds in different directions, with the result that the frequency of rotation of the load is zero. When the control signal is applied to the input of the electromechanical transducer 20 in the end cavities 7 and 8, a pressure differential is formed which biases the spools 1 and 2 to one side or the other, depending on the sign of the control signal. If, for example, the pressure in cavity 7 has increased, and in cavity 8 has decreased, spools 1 and 2 begin to move in the direction of less pressure. At the moment of the beginning of the movement of the stabilizers 1 and 2, the central cavity 9 in which the spring 4 is located is connected through the chamber 17 with the cavity 8. The spool 2 moves by an amount proportional to the compression of one spring, and the slide 1 - by an amount proportional to the compression of two springs of equal rigidity, those. displacement of spool 1 twice the displacement of spool

2. When the control signal changes from zero to the maximum value, the conductivity of the moving gold 1 decreases to zero and then increases again to the initial value, therefore the working fluid consumption through chambers 12 and 13 first decreases to zero, reverses and then increases to the maximum value . In this case, however, the movement of spool 2 Ve; the working fluid splitting pattern 14 and 15 does not change, as with the maximum displacement of spool 2, the conductivity remains the same, and the maximum flow through chambers 14 and 15 is determined only by the pressure limit value source of working fluid. When a control signal of another polarity is applied to the input of the electromechanical converter 20, the pressure in cavity 8 increases and in cavity 7 decreases. The spools 1 and 2 move in the direction of cavity 7, and the flow rate of working fluid through chambers 14 and 15 varies in accordance with the law of change of the control signal, and through chambers 12 and 13 does not change in the manner outlined from the diagram (Fig. 2) It can be seen that when the control current changes from zero to + Jvnp, the frequency of rotation Q of one of the hydraulic motors does not change, and the frequency of rotation of the second hydraulic motor 2 changes from +51, when the control current changes from zero to - Djnp, the pattern of change of rotational frequencies changes on the back. The frequency of rotation of the load in the considered two-channel control is equal to "" r1 (i The use of the invention in hydraulic actuators to control the frequency of rotation of the load allows extending the functionality of the hydraulic actuators and, thereby, increasing the efficiency of their use. Formula of the invention each connected to the cavity of one of the hydraulic motors, a source of working fluid and a drain, and a task its device for generating a control signal at the ends of the distributors, characterized in that, in order to expand the functionality, the valve spools are type-specific, spring-loaded with three springs and installed in one sleeve with the formation of two extreme and one central end cavities, each of which one of the springs is placed, as well as eight intermediate chambers, each of which is bounded by two axes of the same spool, with the extreme end cavity of each spool ana the central nearest thereto through the intermediate chamber. Sources of information taken into account in the examination 1. Basta TM Hydraulic and hydropneumatic automation. M., Mashino1972, p. 21.7. 172. building