SU1290363A1 - Device for dynamic simulation of loads of power servo drives - Google Patents

Abstract

The invention relates to automatic devices for creating dynamic models of control objects as loads of the following actuators of various classes and assignments for testing under bench conditions. The aim of the invention is to increase the efficiency, reliability and expansion of the field of application by reducing energy costs during operation of the loading hydraulic machine in the pumping mode, which is achieved by installing parallel 11 overflow and 12 check valves in the pressure line 5; connecting the amplifying hydromachine 2 (with a pressure regulator) and the loading hydromachine 7. 1 sludge. with S (L with so about with with 05 WITH

Description

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The invention relates to automatic devices for creating dynamic models of control objects as loads of power follow-up drives of various classes and assignments during tests under bench conditions.

The aim of the invention is to increase the efficiency, reliability and expansion of the field of application of the loading device.

The drawing shows a functional diagram of the proposed loading device.

The device comprises a drive motor 1 connected to an amplifying hydromachine 2 equipped with a pressure regulator 3, which

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Hydroline A is connected to pressure line 5. Pressure line 5 and spruce lines 6 are connected to a loading hydraulic machine 7, the regulator of which is connected to the control unit 8, and shaft 9 is connected to the test object 10. and check valves 12. (The inlet of the overflow valve is connected by line 13 to the pressure line 5, and the output by line 14 is connected to the amplifying hydromachine 2. The inlet of check valve 12 is connected by line 15 to the outlet, and the output by line 16 to the inlet of the overflow valve 11 ..

The moment on the shaft 9 of the device is determined by the expression

M K Psiny,

(one)

where K is the coefficient of the moment; P - pressure drop between

pressure head 5 and drain 6 lines;

J is the magnitude of the control action on the loading hydromachine 7.

The pressure in line 5 is kept constant as a result of the operation of pressure regulator 3, information on the change of which is transmitted through line 4, regardless of the magnitude and direction of flow of the working fluid, i.e. the moment M (1) on the output shaft is a function of the magnitude of the control action, the magnitude and sign of which is determined by the control unit 8.

With a positive sign, the loading hydraulic machine operates in

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motor mode and accelerates the test object 10. In this case, the fluid flow from the amplifying hydraulic machine 2 enters the line 14 and then through line 15 to the inlet of the check valve 12. From the non-return valve, the liquid enters through lines 16 and 13 to the pressure line 5. pressure line 5, the working fluid 10 passes the loading hydromachine 7, gives up its potential energy and is discharged into line 6, from where it is sucked in by the hydromachine 2. The drive motor in this mode runs in the motor mode.

With a negative sign jf, the loading hydraulic machine 7 switches to the pumping mode of operation and exerts a brake and (its action to the object 10. The fluid flow in this case is directed from the loading of the hydraulic machine 7 to the pressure line 5.

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From the pressure line, the working fluid through line 13 enters the inlet of the overflow valve 11 (the non-return valve closes). When the valve 11 passes, the working fluid loses potential energy and, at the outlet, has a pressure almost equal to the pressure in line 6. Thus, the pressure difference between lines 14 and 6 is zero. The electric motor is unloaded and runs at idle. The proposed device allows the use of a common industrial asynchronous electric motor as a driving electric motor, which increases efficiency.

Claims (1)

Invention Formula A device for dynamically modeling loads of power following drives, comprising an amplifying hydromachine with a pressure regulator, coupled to pressure and drain hydrorales with a hydraulic loading machine, a driving electric motor connected to an amplifying hydromachine, and a loading hydraulic control unit, This is so because, in order to increase the efficiency, reliability and expansion of the field of application, it is equipped with an overflow valve, the inlet of which is connected to the pressure hydraulic line. The downloaded 312903634 the hydraulic machines, and the outlet is from the amplifier valve, the valve, the inlet and the outlet of which are the hydraulic machine, and in parallel are connected respectively to the outlet valve and installed on the overflow valve and the inlet valve.