SU698013A1 - Device for simulating oil field mechanisms - Google Patents

Description

(54) DEVICE FOR MODELING OF OIL INDUSTRIAL

MEHA1SHZMOV

The invention relates to the field of physical modeling of electric drives of oilfield mechanisms and is intended to create on the shaft of an electric motor practically any laws of change of the moment of resistance.

Devices are known in which a load DC generator is used to create a predetermined resistance moment, controlled either by excitation or by a circuit. The required indicators of reproduction accuracy are provided by introducing into the reproducing unit control system the corresponding feedback signals 1.

The closest to the proposed technical entity is a device for modeling oilfield mechanisms, containing as a loading machine a DC generator, a motor under study and an adjustment circuit 121

The specified device makes it possible to reproduce the modes on the model when the engine under study is only in one

quadrant of its mshkhan11chesky characteristics in the engine mode. This circumstance does not allow investigating, for example, the operation of the engine under test in the generating mode.

The purpose of the invention is to expand the functional capabilities of the device by enabling the study on the model of both motor and brake modes of operation of the tested engine.

Claims (2)

To achieve this goal, a device containing a driver signal, the inputs of which are connected to the outputs of the slip sensor, a memory unit and a feedback unit, the first input of which is connected to an electric motor mechanically connected to the slip sensor, is connected to the output of the generator DC, one input of which is connected to one output of the load block, and a power amplifier, current sensor, module block module and functional converter, whose input connected to the output of the driver of the master. signal, the first output of the functional saw converter is connected to one input of the dc generator, another input of which is connected to the first input of the current sensor, the second input of which is connected to the BTOpbiM output of the functional converter and to another output of the load block, the output of the sensor current through a chain of series-connected power amplifier and module allocation unit is connected to the second input of the feedback unit. The drawing shows the proposed device. The device contains a driver setting signal I; module allocation unit 2; functional converter 3; dc generator 4; electric motor 5; slip sensor 6; load block 7; feedback unit 8; memory block 9; current sensor 10; power amplifier I. When playing the moment on the shaft of the engine under study, the device works as follows. In accordance with the prescribed law of torque variation on the shaft, the control signal produced by the driver 1 is fed to the input of the functional converter 3, working in the rectifying mode, at the load unit 7 opposite the DC generator 4, the current sensor 10 and : the shaft of which is connected through the motor under study 5 with the slip sensor 6. When the current in the core circuit changes, the signal from the current sensor 10 is fed through the amplifier 11 to the input of the module 2 of the extraction unit. The feedback is fed to the input of the imaging unit 1 through the feedback unit 8. After comparing with a given signal, the error arrives at the functional converter 3. When using information about the real load moment (for example, a real time magnetogram), the driving signal is output from the memory block 9, With an increase in the value of the driving signal, the current of the functional converter 3 increases, and the current of the generator 4 decreases. At a certain value of the driving signal, the generator current is zero. With further growth of the driving signal, the generator current changes its direction — the generator goes into motor mode at a constant direction of rotational speed. Accordingly, the sign of the feedback signal on the eye is also metered. However, due to the presence in the circuit of the obatai connection of the allocation unit of the module, the ratio between the signs of the master signal and the link signal is constant, and therefore stability is maintained in the study and the generator mode of the engine under study (the motor mode of the constant-toa generator). Thus, the implementation of the device in accordance with the invention makes it possible to assemble any operating modes (motor generating) of the test system, the key, artificial and emergency. Apparatus of the Invention A device for simulating oilfield mechanisms, comprising a driver of a master signal, the inputs of which are connected respectively to the outputs of a slip sensor, a memory unit and a feedback unit, the first input of which is connected to an electric motor mechanically connected to a slip sensor, the input of the electric motor is connected to an output a DC generator, one input of which is connected to one output of a load unit, and a power amplifier, which is such that, in order to extend it, Due to the smooth transition from the motor mode to the generator mode, a current sensor, a module allocation unit and a functional converter, the input of which is connected to the output of the driver signal, the first output of the functional converter, are connected to the device, other. input which -. It is connected to the first input of the current sensor, the second input of which is connected to the second output of the function converter and to another output of the load unit, the output of the current sensor through a chain of serially connected power amplifiers and the selection module of the module is connected to the second input of the feedback unit. Sources of information taken into account in the examination 1. Author's testimony of the USSR No. 550655, cl. G 06 G 7/62, 1975. 2. USSR author's certificate number 416707, cl. G 06 G 7/48, 1971 (prototype).