CN114810739A - Pneumatic motor servo system and control method - Google Patents

Pneumatic motor servo system and control method Download PDF

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Publication number
CN114810739A
CN114810739A CN202210419246.7A CN202210419246A CN114810739A CN 114810739 A CN114810739 A CN 114810739A CN 202210419246 A CN202210419246 A CN 202210419246A CN 114810739 A CN114810739 A CN 114810739A
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China
Prior art keywords
air
pneumatic motor
valve
flow
rotating speed
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Chinese (zh)
Inventor
刘焱
吕志鸿
夏焕文
王磊
杨丽玲
薛松
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China North Vehicle Research Institute
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China North Vehicle Research Institute
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Priority to CN202210419246.7A priority Critical patent/CN114810739A/en
Publication of CN114810739A publication Critical patent/CN114810739A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F15B21/087—Control strategy, e.g. with block diagram
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/027—Check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/16—Special measures for feedback, e.g. by a follow-up device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/005—Fault detection or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/048—Arrangements for compressed air preparation, e.g. comprising air driers, air condensers, filters, lubricators or pressure regulators

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention belongs to the technical field of pneumatic motors, and particularly relates to a pneumatic motor servo system and a control method, wherein the pneumatic motor servo system comprises an air source control system, a pneumatic motor body, a first air port, a second air port and an output shaft; the output shaft is provided with a rotating speed sensor, and the air source control system controls the flow of the air source entering the pneumatic motor body; the air source control system comprises an air compressor, an air inlet valve, a forward rotating valve and a reverse rotating valve which are connected in sequence, the forward rotating valve and the reverse rotating valve are connected in parallel at the rear part of the air inlet valve, the rear part of the air inlet valve is also connected with a flow ratio regulating valve, and the forward rotating valve and the reverse rotating valve are connected in parallel at the rear part of the flow ratio regulating valve; according to the pneumatic motor servo system, the output rotating speed of the pneumatic motor is obtained by arranging the rotating speed sensor on the output shaft, and the air flow entering the pneumatic motor is regulated through the flow ratio regulating valve, so that the loss of an air source in the conveying process is eliminated or reduced, and the required rotating speed output by the pneumatic motor is ensured.

Description

Pneumatic motor servo system and control method
Technical Field
The invention belongs to the technical field of pneumatic motors, and particularly relates to a servo system of a pneumatic motor and a control method.
Background
Compared with the traditional electric motor and hydraulic motor, the pneumatic motor has lighter weight and is convenient to install and transport; because the working medium is compressed air, the fire disaster can not be caused; the pneumatic motor can keep balance with the air supply pressure when being overloaded and automatically stop rotating; compared with a hydraulic motor, the leakage of the compressed air can not cause pollution to the environment; compared with an electric motor, the motor damage phenomenon caused by the problems of overvoltage, overcurrent, insulation reduction and the like does not exist.
However, the output speed of the pneumatic motor is directly related to the air supply thereof, and in the prior art, the air supply has a lot of loss in the process of entering the pneumatic motor from the compressor, which directly affects the output speed of the pneumatic motor, so that the pneumatic motor is difficult to reach or just obtains the required speed.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to provide a pneumatic motor servo system and a control method thereof to realize real-time feedback control and obtain the required accurate output rotating speed of a pneumatic motor.
(II) technical scheme
In order to solve the above technical problem, the present invention provides a pneumatic motor servo system, comprising: the pneumatic motor and the air source control system supply air to the pneumatic motor;
the pneumatic motor comprises a pneumatic motor body, a first air port, a second air port and an output shaft; the output shaft is provided with a rotating speed sensor, and the rotating speed sensor is used for acquiring a rotating speed signal of the output shaft and transmitting the rotating speed signal to the air source control system;
the air source control system is used for controlling the flow of the air source entering the pneumatic motor body;
the air supply control system comprises: the air-liquid separator, the air purifier, the air compressor and the air inlet valve are connected in sequence; the air source control system also comprises a forward rotating valve, a reverse rotating valve, a first air inlet flow sensor and a second air inlet flow sensor;
the first air inlet flow sensor is arranged at the rear part of the forward rotation valve and communicated with the first air port, the second air inlet flow sensor is arranged at the rear part of the reverse rotation valve and communicated with the second air port, and the forward rotation valve and the reverse rotation valve are connected at the rear part of the air inlet valve in parallel; the first air port and the second air port are respectively connected with a first air return pipe and a second air return pipe, and the first air return pipe and the second air return pipe are both communicated with the gas-liquid separator;
a flow ratio regulating valve is connected between the rear part of the air inlet valve and the forward rotating valve and between the rear part of the air inlet valve and the reverse rotating valve, and the forward rotating valve and the reverse rotating valve are connected in parallel at the rear part of the flow ratio regulating valve;
therefore, the rotating speed signal output by the output shaft of the pneumatic motor is acquired in real time through the rotating speed sensor and fed back to the air source control system, and the air source control system controls the air pressure and the air flow entering the pneumatic motor in real time to ensure that the pneumatic motor outputs the required rotating speed.
The flow ratio regulating valve is an electric valve, and the flow conveying opening degree is automatically regulated through the controller, so that the actual output flow is regulated.
The rated air pressure and the rated air flow output by the air compressor are larger than the air flow pressure and the air flow required by the pneumatic motor, so that the loss of air in motion is compensated, and the output of the pneumatic motor is ensured to require the rated rotating speed.
The first air return pipe and the second air return pipe are respectively provided with a first one-way valve and a second one-way valve which are used for controlling and selecting air return air paths and are respectively suitable for working in two working modes of positive rotation and negative rotation of the pneumatic motor.
The pneumatic motor comprises a pneumatic motor body, a first air cavity and a second air cavity, wherein the pneumatic motor body is internally provided with the first air cavity and the second air cavity which are respectively communicated with a first air port and a second air port;
wherein, still be provided with the exhaust hole on the first air cavity, install manual flow control valve on the exhaust hole.
The arrangement of the exhaust port and the manual flow regulating valve can realize the micro-regulation of the rotating speed output by the pneumatic motor through the manual micro-regulation of the air pressure and the flow in the pneumatic motor body, thereby providing a regulating mode of the output rotating speed of the pneumatic motor;
in normal work or under the automatic control of the whole pneumatic motor servo system, the pneumatic motor outputs a required rotating speed chamber, and the exhaust hole and the manual flow regulating valve are closed;
and under the automatic control of the whole servo system, a trace amount of deviation exists, and the deviation can be adjusted through the manual flow adjusting valve.
The air source control system is also connected with a servo controller, and the servo controller comprises a control module, a signal acquisition module, a signal output module and a communication module; the communication module is connected with the upper computer, the signal acquisition module is in signal connection with the rotating speed sensor, the first air inlet flow sensor and the second air inlet flow sensor respectively, and the signal output module is in signal connection with the air inlet valve, the forward rotating valve, the reverse rotating valve and the flow ratio regulating valve respectively.
The air inlet valve, the forward rotating valve, the reverse rotating valve and the flow ratio regulating valve are all electric automatic control valves.
The flow signals output by the first air intake flow sensor and the second air intake flow sensor are used for detecting and verifying whether the pneumatic motor works normally, if the flow in the first air intake flow sensor and the flow in the second air intake flow sensor are normal, but the pneumatic motor cannot output the required rotating speed all the time, the pneumatic motor is judged to have a fault, and the shutdown maintenance is required.
In addition, the present invention further provides a control method of a pneumatic motor servo system, which is used as the control method of the pneumatic motor servo system, and the method specifically comprises the following steps:
the signal acquisition module acquires a rotating speed signal of an output shaft of the pneumatic motor in real time and transmits the rotating speed signal to the control module of the servo controller, the control module generates a feedback signal for controlling the flow ratio adjusting valve by calculating and judging the real-time rotating speed and a set value, and the flow ratio adjusting valve controls the air quantity of an air source entering the pneumatic motor to ensure that the pneumatic motor outputs the required rotating speed.
(III) advantageous effects
Compared with the prior art, the invention provides a pneumatic motor servo system, which obtains the output rotating speed of a pneumatic motor by arranging a rotating speed sensor on an output shaft, regulates the air flow entering the pneumatic motor through a flow ratio regulating valve, eliminates or reduces the loss of an air source in the conveying process, and ensures that the pneumatic motor outputs the required rotating speed.
The invention obtains the real-time output rotating speed of the pneumatic motor through the real-time closed-loop control of the servo controller.
Drawings
Fig. 1 is a schematic structural diagram of a pneumatic motor servo system according to the technical solution of the present invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
In order to solve the above technical problem, the present invention provides a pneumatic motor servo system, as shown in fig. 1, the pneumatic motor servo system includes: the pneumatic motor and the air source control system supply air to the pneumatic motor;
the pneumatic motor comprises a pneumatic motor body, a first air port, a second air port and an output shaft; the output shaft is provided with a rotating speed sensor, and the rotating speed sensor is used for acquiring a rotating speed signal of the output shaft and transmitting the rotating speed signal to the air source control system;
the air source control system is used for controlling the flow of an air source entering the pneumatic motor body;
the air supply control system comprises: the air-liquid separator, the air purifier, the air compressor and the air inlet valve are connected in sequence; the air source control system also comprises a forward rotating valve, a reverse rotating valve, a first air inlet flow sensor and a second air inlet flow sensor;
the first air inlet flow sensor is arranged at the rear part of the forward rotation valve and communicated with the first air port, the second air inlet flow sensor is arranged at the rear part of the reverse rotation valve and communicated with the second air port, and the forward rotation valve and the reverse rotation valve are connected at the rear part of the air inlet valve in parallel; the first air port and the second air port are respectively connected with a first air return pipe and a second air return pipe, and the first air return pipe and the second air return pipe are both communicated with the gas-liquid separator;
a flow ratio regulating valve is connected between the rear part of the air inlet valve and the forward rotating valve and between the rear part of the air inlet valve and the reverse rotating valve, and the forward rotating valve and the reverse rotating valve are connected in parallel at the rear part of the flow ratio regulating valve;
therefore, the rotating speed signal output by the output shaft of the pneumatic motor is obtained in real time through the rotating speed sensor and is fed back to the air source control system through the closed loop, the air source control system controls air pressure and air flow entering the pneumatic motor in real time, the required rotating speed output by the pneumatic motor is ensured, and the problem that in the prior art, the actual rotating speed output by the pneumatic motor is smaller than the required rated rotating speed due to air flow and air pressure loss in the working process of the pneumatic motor and the air source system is solved.
The flow ratio regulating valve is an electric valve, and the flow conveying opening degree is automatically regulated through the controller, so that the actual output flow is regulated.
The rated air pressure and the rated air flow output by the air compressor are larger than the air flow pressure and the air flow required by the pneumatic motor, so that the loss of air in motion is compensated, and the output of the pneumatic motor is ensured to require the rated rotating speed.
The first air return pipe and the second air return pipe are respectively provided with a first one-way valve and a second one-way valve which are used for controlling and selecting air return air paths and are respectively suitable for working in two working modes of positive rotation and negative rotation of the pneumatic motor.
The pneumatic motor comprises a pneumatic motor body, a first air cavity and a second air cavity, wherein the pneumatic motor body is internally provided with the first air cavity and the second air cavity which are respectively communicated with a first air port and a second air port;
wherein, still be provided with the exhaust hole on the first air cavity, install manual flow control valve on the exhaust hole.
The arrangement of the air outlet and the manual flow regulating valve can realize the micro-regulation of the rotating speed output by the pneumatic motor through the manual micro-regulation of the air pressure and the flow in the pneumatic motor body, thereby providing a regulating mode of the rotating speed output by the pneumatic motor;
in normal work or under the automatic control of the whole pneumatic motor servo system, the pneumatic motor outputs a required rotating speed chamber, and the exhaust hole and the manual flow regulating valve are closed;
and under the automatic control of the whole servo system, a trace amount of deviation exists, and the deviation can be adjusted through the manual flow adjusting valve.
The air source control system is also connected with a servo controller, and the servo controller comprises a control module, a signal acquisition module, a signal output module and a communication module; the communication module is connected with the upper computer, the signal acquisition module is in signal connection with the rotating speed sensor, the first air inlet flow sensor and the second air inlet flow sensor respectively, and the signal output module is in signal connection with the air inlet valve, the forward rotating valve, the reverse rotating valve and the flow ratio regulating valve respectively.
The air inlet valve, the forward rotating valve, the reverse rotating valve and the flow ratio regulating valve are all electric automatic control valves.
The flow signals output by the first air intake flow sensor and the second air intake flow sensor are used for detecting and verifying whether the pneumatic motor works normally, if the flow in the first air intake flow sensor and the flow in the second air intake flow sensor are normal, but the pneumatic motor cannot output the required rotating speed all the time, the pneumatic motor is judged to have a fault, and the shutdown maintenance is required.
In addition, the present invention further provides a control method of a pneumatic motor servo system, which is used as the control method of the pneumatic motor servo system, and the method specifically comprises the following steps:
the signal acquisition module acquires a rotating speed signal of an output shaft of the pneumatic motor in real time and transmits the rotating speed signal to the control module of the servo controller, the control module generates a feedback signal to control the flow proportion regulating valve by calculating and judging the real-time rotating speed and a set value, and the flow proportion regulating valve controls the air quantity of an air source entering the pneumatic motor to ensure that the pneumatic motor outputs the required rotating speed; in the control method, the real-time output rotating speed of the pneumatic motor is obtained through the real-time closed-loop control of the servo controller.
Example 1
As shown in fig. 1, the present embodiment provides a pneumatic motor servo system, which includes a pneumatic motor and an air source control system for supplying air to the pneumatic motor;
the pneumatic motor comprises a pneumatic motor body, a first air port, a second air port and an output shaft; a rotating speed sensor is mounted on the output shaft, and the rotating speed sensor acquires a rotating speed signal of the output shaft and transmits the rotating speed signal to the air source control system;
the air source control system is used for controlling the flow of the air source entering the pneumatic motor body;
the air supply control system comprises: the air-liquid separator, the air purifier, the air compressor and the air inlet valve are connected in sequence; the air source control system also comprises a forward rotating valve, a reverse rotating valve, a first air inlet flow sensor and a second air inlet flow sensor;
the first air inlet flow sensor is arranged at the rear part of the forward rotation valve and communicated with the first air port, the second air inlet flow sensor is arranged at the rear part of the reverse rotation valve and communicated with the second air port, the forward rotation valve and the reverse rotation valve are connected in parallel at the rear part of the air inlet valve, the first air port and the second air port are respectively connected with a first air return pipe and a second air return pipe, and the first air return pipe and the second air return pipe are both communicated with the gas-liquid separator;
a flow ratio regulating valve is connected between the rear part of the air inlet valve and the forward rotating valve and between the rear part of the air inlet valve and the reverse rotating valve, and the forward rotating valve and the reverse rotating valve are connected in parallel at the rear part of the flow ratio regulating valve;
based on the technical scheme, the rotating speed signal output by the output shaft of the pneumatic motor is acquired in real time through the rotating speed sensor and is fed back to the air source control system through a closed loop, the air source control system controls the air pressure and the air flow entering the pneumatic motor in real time to ensure that the pneumatic motor outputs the required rotating speed, and the problem that in the prior art, the actual rotating speed output by the pneumatic motor is smaller than the required rated rotating speed due to the fact that the air flow and the air pressure loss occur in the working process of the pneumatic motor and the air source system is solved.
The flow proportion regulating valve in the pneumatic motor servo system is an electric valve, and the flow conveying opening degree is automatically regulated through a controller, so that the actual output flow is regulated;
the rated air pressure and the rated air flow output by the air compressor in the pneumatic motor servo system are larger than the air flow pressure and the air flow required by the pneumatic motor, so that the loss of air in motion is compensated, and the output of the pneumatic motor is ensured to require the rated rotating speed.
In the pneumatic motor servo system, a first check valve and a second check valve are respectively arranged on a first air return pipe and a second air return pipe, are used for controlling and selecting air return air paths, and are respectively suitable for working in two working modes of forward rotation and reverse rotation of the pneumatic motor.
In the pneumatic motor servo system, a first air cavity and a second air cavity which are respectively communicated with a first air port and a second air port are arranged in a pneumatic motor body, an exhaust hole is also arranged on the first air cavity, and a manual flow regulating valve is arranged on the exhaust hole; the design of gas vent and manual flow control valve can be through manual micro-adjustment to pneumatic motor body internal gas pressure and flow, realizes the micro-adjustment to the rotational speed of pneumatic motor output, provides the regulation mode of a pneumatic motor output rotational speed. In normal operation, or under the automatic control of the whole pneumatic motor servo system, the pneumatic motor outputs the required rotating speed chamber, and the exhaust hole and the manual flow regulating valve are closed. Under the automatic control of the whole servo system, a trace amount of deviation exists, and the manual flow regulating valve can be used for regulating.
In the pneumatic motor servo system, a servo controller is also connected to an air source control system, and the servo controller comprises a control module, a signal acquisition module, a signal output module and a communication module; the system comprises a communication module, a signal acquisition module, a signal output module and a flow ratio regulating valve, wherein the communication module is connected with an upper computer, the signal acquisition module is respectively in signal connection with a rotating speed sensor, a first air inlet flow sensor and a second air inlet flow sensor, and the signal output module is respectively in signal connection with an air inlet valve, a forward rotating valve, a reverse rotating valve and the flow ratio regulating valve;
the air inlet valve, the forward rotating valve, the reverse rotating valve and the flow ratio regulating valve are all electric automatic control valves, and control accuracy is improved and ensured through signal automatic control.
The flow signals output by the first air intake flow sensor and the second air intake flow sensor are used for detecting and verifying whether the pneumatic motor works normally, if the flow in the first air intake flow sensor and the flow in the second air intake flow sensor are normal, but the pneumatic motor cannot output the required rotating speed all the time, the pneumatic motor is judged to have a fault, and the shutdown maintenance is required.
In addition, the present invention also provides a control method of a servo system of an air motor, which is used as the control method of the servo system of the air motor, and the method specifically comprises the following steps:
the signal acquisition module acquires a rotating speed signal of an output shaft of the pneumatic motor in real time and transmits the rotating speed signal to the control module of the servo controller, the control module generates a feedback signal to control the flow proportion regulating valve by calculating and judging the real-time rotating speed and a set value, and the flow proportion regulating valve controls the air quantity of an air source entering the pneumatic motor to ensure that the pneumatic motor outputs the required rotating speed; in the control method, the real-time output rotating speed of the pneumatic motor is obtained through the real-time closed-loop control of the servo controller.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A pneumatic motor servo, comprising: the pneumatic motor and the air source control system supply air to the pneumatic motor;
the pneumatic motor comprises a pneumatic motor body, a first air port, a second air port and an output shaft; the output shaft is provided with a rotating speed sensor, and the rotating speed sensor is used for acquiring a rotating speed signal of the output shaft and transmitting the rotating speed signal to the air source control system;
the air source control system is used for controlling the flow of the air source entering the pneumatic motor body;
the air supply control system includes: the air-liquid separator, the air purifier, the air compressor and the air inlet valve are connected in sequence; the air source control system also comprises a forward rotating valve, a reverse rotating valve, a first air inlet flow sensor and a second air inlet flow sensor;
the first air inlet flow sensor is arranged at the rear part of the forward rotation valve and communicated with the first air port, the second air inlet flow sensor is arranged at the rear part of the reverse rotation valve and communicated with the second air port, and the forward rotation valve and the reverse rotation valve are connected at the rear part of the air inlet valve in parallel; the first air port and the second air port are respectively connected with a first air return pipe and a second air return pipe, and the first air return pipe and the second air return pipe are both communicated with the gas-liquid separator;
a flow ratio regulating valve is connected between the rear part of the air inlet valve and the forward rotating valve and between the rear part of the air inlet valve and the reverse rotating valve, and the forward rotating valve and the reverse rotating valve are connected in parallel at the rear part of the flow ratio regulating valve;
therefore, the rotating speed signal output by the output shaft of the pneumatic motor is acquired in real time through the rotating speed sensor and fed back to the air source control system, and the air source control system controls the air pressure and the air flow entering the pneumatic motor in real time to ensure that the pneumatic motor outputs the required rotating speed.
2. The pneumatic motor servo system of claim 1, wherein the flow rate proportional control valve is an electric valve, and the actual output flow rate is adjusted by automatically adjusting the flow rate delivery opening degree by the controller.
3. The pneumatic motor servo system of claim 1, wherein the air compressor outputs a rated air pressure and flow rate greater than the air flow rate required by the pneumatic motor to compensate for losses in movement of air to ensure that the pneumatic motor outputs a rated speed.
4. The pneumatic motor servo system of claim 1, wherein the first and second return air pipes are respectively provided with a first check valve and a second check valve for controlling and selecting the return air passage, which are respectively adapted to operate in two operating modes of forward rotation and reverse rotation of the pneumatic motor.
5. The air motor servo system according to claim 1, wherein a first air chamber and a second air chamber which are respectively communicated with the first air port and the second air port are provided in the air motor body;
wherein, still be provided with the exhaust hole on the first air cavity, install manual flow control valve on the exhaust hole.
6. The pneumatic motor servo system as claimed in claim 1, wherein the exhaust port and the manual flow regulating valve are arranged to enable the fine adjustment of the output rotation speed of the pneumatic motor by manually fine-adjusting the air pressure and flow rate in the pneumatic motor body, thereby providing a way of adjusting the output rotation speed of the pneumatic motor;
in normal work or under the automatic control of the whole pneumatic motor servo system, the pneumatic motor outputs a required rotating speed chamber, and the exhaust hole and the manual flow regulating valve are closed;
and under the automatic control of the whole servo system, a trace amount of deviation exists, and the deviation can be adjusted through the manual flow adjusting valve.
7. The pneumatic motor servo system as claimed in claim 1, wherein a servo controller is further connected to the air source control system, and the servo controller comprises a control module, a signal acquisition module, a signal output module and a communication module; the communication module is connected with the upper computer, the signal acquisition module is in signal connection with the rotating speed sensor, the first air inlet flow sensor and the second air inlet flow sensor respectively, and the signal output module is in signal connection with the air inlet valve, the forward rotating valve, the reverse rotating valve and the flow ratio regulating valve respectively.
8. The pneumatic motor servo system of claim 1 wherein the inlet valve, forward rotation valve, reverse rotation valve and flow ratio adjustment valve are electrically actuated automatic control valves.
9. The servo system of claim 1, wherein the first and second intake flow sensors output flow signals for detecting and verifying whether the pneumatic motor is operating normally, and if the flow in the first and second intake flow sensors is normal but the pneumatic motor is not always capable of outputting the required rotation speed, it is determined that the pneumatic motor itself is out of order and needs to be stopped for maintenance.
10. A control method of a servo system of a pneumatic motor, which is used as the control method of the servo system of the pneumatic motor according to any one of claims 1 to 9, and which is embodied as follows:
the signal acquisition module acquires a rotating speed signal of an output shaft of the pneumatic motor in real time and transmits the rotating speed signal to the control module of the servo controller, the control module generates a feedback signal for controlling the flow ratio adjusting valve by calculating and judging the real-time rotating speed and a set value, and the flow ratio adjusting valve controls the air quantity of an air source entering the pneumatic motor to ensure that the pneumatic motor outputs the required rotating speed.
CN202210419246.7A 2022-04-20 2022-04-20 Pneumatic motor servo system and control method Pending CN114810739A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210419246.7A CN114810739A (en) 2022-04-20 2022-04-20 Pneumatic motor servo system and control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210419246.7A CN114810739A (en) 2022-04-20 2022-04-20 Pneumatic motor servo system and control method

Publications (1)

Publication Number Publication Date
CN114810739A true CN114810739A (en) 2022-07-29

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ID=82505169

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Application Number Title Priority Date Filing Date
CN202210419246.7A Pending CN114810739A (en) 2022-04-20 2022-04-20 Pneumatic motor servo system and control method

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CN (1) CN114810739A (en)

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