SU1344873A1 - Hydroelectric system for command control of multicoordinate road-building machine - Google Patents

Abstract

The invention relates to road construction machinery and allows to simplify the design of the system and increase its reliability. The system contains a remote control 1, threshold comparators 2-4, adder 5 with gain factors for each input, electronic proportional control unit 6, proportional electro-hydraulic distributor (EGR) 7 and relay dual-position EGRs 8, 9 and 10 connecting hydraulic cylinders (HZ) 11-13 to the working cavity A and B of the EGR 7. The number of comparators 2-4 and EGR 8-10 corresponds to S (Л с: (jO 4 4 О) CO - -e} P 12

Description

There is no number of ispolitich GC and can be arbitrary. The control signals from the output of the console 1 sequentially in time arrive at the comparators 2–4, connecting HZ 11–13 via EGR 8–10 to cavities A and B.

The invention relates to road building machinery, in particular, to electrohydraulic control systems of working bodies of multi-coordinate road building machines, such as construction manipulators, having a significant number (3 or more) of remotely controlled working bodies.

The purpose of the invention is to simplify the design and increase reliability.

The goal is achieved by the fact that electro-hydraulic relay control valves, electro-hydraulic proportional distributors, electronic proportional control units and actuating hydraulic motors, are introduced into the electro-hydraulic command control system of the multi-axis coordinated road-building machine, hydraulic control actuators, each with their input is connected to control line connected to the output of the proportional valve, and the output tional dvuhpozi- electrohydraulic relay valves are connected to respective hydraulic motors ispohgaitelnym m. The system also includes a control signal adder and two threshold comparators, the number of which is equal to the number of electro-hydraulic on-off relay distributors. The outputs of the remote control panel are connected via two-threshold comparators to the solenoids of the relay distributors, and also connected to the inputs of the cymatter, the output of which through the electrical control unit is connected to the electromagnets of the proportional distributor.

The control signals, the passage through the adder 5 and the block 6, regulate the current in the electromagnets of the EGR 7 and, say, the flow rate of the liquid through the HZ, which is currently connected to cavities A and B. 1 Il.

The drawing shows a functional diagram of the electro-hydraulic command and control system of a multi-axis construction road machine, in which the connections between the electronic elements are shown as a dashed line, and between the hydraulic elements - a solid line.

The electrohydraulic command and control system of a multi-coordinate construction road machine consists of a remote control panel 1, threshold comparators 2-4, adder 5 with gain factors for each input equal to one, proportional control electronic unit 6, proportional electro-hydraulic distributor 7 and electro-hydraulic relay two-position distributors 8 -10, plug-in; their hydraulic cylinders 11-13 to working cavity A and B

proportional electro-hydraulic distributor 7. The number of threshold comparators and on-off relay distributors corresponds to the number of executive hydraulic cylinders and can be arbitrary.

Each output of the remote control 1 is connected through the corresponding threshold comparator 2-4 to the relay electromagnet

distributor 8-iO. At the same time, the outputs of the remote control 1 are connected to the inputs of the adder 5, the output of which is connected to the input of the electronic control unit 6,

and the output of control unit 6, with electromagnets of proportional distributor 7, the output working cavities L and B through relay distributors 8-10 are connected to the ispol

on hydraulic cylinders

The electrohydraulic command control system of a multi-coordinate construction road machine works as follows.

With zero control signals at the output of console 1, the signals at the outputs of threshold comparators 2-4, adder 5 and control unit 6 are also zero, and all electromagnets are de-energized. In this case, the proportional distributor 7 is in the neutral position, and the hydraulic cylinders 11–13 are cut off from cavities A and B by the relay distributors 8–1, respectively.

When a control signal appears at any output of console 1 and the signal exceeds the threshold of the comparator triggering, for example, a signal for entering the comparator 2, the comparator output is signaled by a switching electromagnet 8, which connects the hydraulic cylinder 11 to the working cavity A and B of the proportional distributor 7. At the same time, the control signal passes through the adder 5 to the electronic unit 6 proportional to the control that generates a current in the electromagnets of the distributor 7, proportional to The amount of control signal. A proportional displacement of the distributor 7 in turn creates a proportional flow of fluid through the relay distributor 8 and the hydraulic cylinder 11. In a similar way, the system works when a control signal is received at other inputs, proportional to the flow control of the hydraulic cylinder 12 or 13.

Thus, the proposed system (in comparison with the known ones) provides proportional regulation by a significant number of machine working parts when using one proportional and required Compiler

Editor A. Revin Tehred L.Oln

Order 4894/31 Circulation 606 Subscription

VNISH1I USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

th number of relay distributors. This circumstance significantly enhances reliability and simplifies the design, and at equal cost, the proposed and known systems allow the use of more accurate proportional control components.

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Claims (1)

Invention Formula The electrohydraulic command and control system of a multi-axis construction road machine, comprising a remote control, proportional electrohydraulic distributors, proportional control electronic units and actuating hydraulic motors, characterized in that, in order to simplify the design and increase reliability, the system is equipped with electro-hydraulic relay dual positioning distributors. comparators and an adder with a gain of the inputs equal to The number, moreover, the number of electro-hydraulic relay on-off valves, double-threshold comparators and the inputs of the adder corresponds to the number of actuating hydraulic motors, each of the electro-hydraulic relay on-off valves using its input is hydraulically connected to the output of the proportional valve, and the output is connected to the corresponding actuating hydro-controller on the controller, corresponding to the control hydro-motor the comparator is connected to the corresponding output of the remote control And the input of the adder, and the output is connected to the corresponding electromagnet of the electrohydraulic relay two-position distributor, the input of the adder is connected to the input of the proportional control electronic unit, the outputs of which are connected to the electromagnets of the proportional distributor. Proofreader M. Demchik