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Control actuator of engine for movable pipeline pump set

A technology for controlling actuators and engines, which is applied in engine control, machines/engines, mechanical equipment, etc. It can solve the problems of low comparison accuracy and tracking accuracy of analog circuits, easy to be affected by temperature changes, poor followability, etc., and achieve high conversion Accuracy and stability, the effect of extending reliability

Active Publication Date: 2006-05-24
PETRO OIL & LUBRICANT RES INST OF THE GENERAL LOGISITIC DEPT OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing problems are: the comparison accuracy and tracking accuracy of the analog circuit are relatively low, and it is easily affected by temperature changes, making the control system unstable; the torque of the stepping motor is small, and the dynamic response is slow
The drive of the motor adopts the analog voltage regulation and speed regulation method. At different speeds, the torque of the motor will change, and the phenomenon of stalling may occur at low speeds; the rigid connection between the motor and the throttle makes it reverse after the adjustment When adjusting, there will be adjustment gaps, poor followability, and non-linear adjustment problems

Method used

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  • Control actuator of engine for movable pipeline pump set
  • Control actuator of engine for movable pipeline pump set
  • Control actuator of engine for movable pipeline pump set

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The engine of the pipeline pump unit can generally be operated by mechanical manual when it is started. Psychologically speaking, and in terms of system design requirements, there is generally a mechanical manual operation part. During operation, when the handwheel is turned clockwise, the engine speed increases, and counterclockwise means deceleration.

[0061] Generally speaking, when the inlet pressure of the pump is relatively high, the hand wheel turns clockwise, the worm gear drives the flexible tendons, tightens the engine throttle, the engine speeds up, the pump also speeds up, and when the pump inlet pressure drops to an appropriate pressure, the machine stops. Manual operation, the speed of the pump unit is maintained at this speed.

[0062] The real meaning is that when the operation of the electric and automatic systems is inflexible, the pump unit is operated manually by mechanical hands.

Embodiment 2

[0064] Pin 8 of the single-chip microcomputer 101 is an automatic / electric state switch input terminal, low level is electric, and high level is automatic. The low level of pin 6 is for the electric forward rotation engine to speed up, and the low level of pin 7 is for the electric reverse engine to slow down.

[0065] When the engine of the pipeline pump unit starts to run, first move the automatic / electric state switch to the electric position, and use the electric manual to operate. It is flexible, easy to operate, stable and reliable. When the pipeline system is running and the pump inlet pressure is relatively high, Press the engine speed-up button, when the 6 pins of the single-chip microcomputer 101 are at a low level, the forward rotation control signal voltage is output from the RC7 of the I / O port of the PIC series single-chip microcomputer 101 to the PWM pulse width modulation power amplifier 103 connected thereto Forward rotation control signal receiving end; the f...

Embodiment 3

[0069] Pin 8 of the single-chip microcomputer 101 is an automatic / electric state switch input terminal, low level is electric, and high level is automatic.

[0070] After the whole pipeline system runs stably, set the value of the pump inlet pressure to a given value, move the automatic / electric state switch to the automatic position, and the entire automatic control system enters the automatic state.

[0071]The A / D conversion module 102 converts the 0-5V analog control voltage output by the microcomputer and the 0-5V angular voltage fed back by the actuator throttle position feedback device 33 into digital signals in the A / D conversion module 102, and then transmits them in time division Give the PIC series single-chip microcomputer 101, after the PIC series single-chip microcomputer 101 compares the two signals, when the analog control voltage is greater than the corner voltage, output the positive rotation control signal voltage from the RC7 of the I / O port of the PIC serie...

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Abstract

A control actuator for an engine used in a mobile pipeline pump unit, the actuator includes a DC torque motor flexibly connected to the engine throttle, and a throttle position feedback device connected to the flexible connection mechanism synchronously outputs the 0-5V DC voltage of the engine throttle position; Part of the A / D conversion module converts the 0-5V analog control voltage of the microcomputer and the 0-5V angular voltage of the feedback device into digital signals, and sends them to the single-chip microcomputer for comparison. When the analog voltage is greater than the angular voltage, the RC7 terminal of the single-chip microcomputer outputs a positive rotation signal The voltage is sent to the forward signal receiving end of the power amplifier; when the analog voltage is less than the angular voltage, the microcontroller RC6 terminal outputs the reverse signal voltage to the reverse signal receiving end of the power amplifier to achieve the purpose of control. Its single-chip microcomputer can conveniently control the A / D conversion precision, and the BTL circuit of the power amplifier can be powered by a single power supply, which simplifies the circuit, reduces the cost, and has reliable performance; the PWM voltage drive can adjust the motor speed arbitrarily, and the torque is balanced.

Description

technical field [0001] The invention relates to a motor control actuator for a mobile pipeline pump unit in a "pump-pump" airtight delivery mode. Background technique [0002] The adjustment of pipeline oil delivery conditions is realized through an engine control actuator, that is, the actuator changes the opening of the engine throttle to change the engine speed, which drives the oil pump speed to change, thereby adjusting the inlet and outlet pressure of the oil pump, and finally makes the pipeline Oil delivery conditions changed. [0003] Traditional engine control actuators use analog circuit technology and stepping motors, and rigid connections are often used between the motor and the throttle. The existing problems are: the comparison accuracy and tracking accuracy of the analog circuit are relatively low, and it is easily affected by temperature changes, which makes the control system unstable; the torque of the stepping motor is small, and the dynamic response is s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D11/00F02D11/10
Inventor 李维生宋音徐世生戴健筵丽萍王兆理彭向军孙菲艾书佩吕九枝
Owner PETRO OIL & LUBRICANT RES INST OF THE GENERAL LOGISITIC DEPT OF PLA
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