CN115143102A - Rotor gear metering pump and method for controlling rotating speed regulation precision thereof - Google Patents
Rotor gear metering pump and method for controlling rotating speed regulation precision thereof Download PDFInfo
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- CN115143102A CN115143102A CN202210877536.6A CN202210877536A CN115143102A CN 115143102 A CN115143102 A CN 115143102A CN 202210877536 A CN202210877536 A CN 202210877536A CN 115143102 A CN115143102 A CN 115143102A
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- rotor
- servo motor
- pump
- gear
- potentiometer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/08—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the rotational speed
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses a rotor gear metering pump and a method for controlling the rotating speed regulation precision of the rotor gear metering pump, and belongs to the technical field of rotor gear metering pumps. The rotor gear pump includes: a drive device and a pump body; the driving device includes: the device comprises a circuit board, a servo motor, a single-ring potentiometer, a multi-ring potentiometer, a change-over switch, a liquid level switch, a communication interface and a power interface, wherein the servo motor, the single-ring potentiometer, the multi-ring potentiometer, the change-over switch, the liquid level switch, the communication interface and the power interface are respectively electrically connected with the circuit board; and the output end of the servo motor is connected with the pump body. According to the invention, the single-ring potentiometer and the multi-ring potentiometer which are arranged outside can be used in a matched manner, so that the rotating speed of the servo motor can be accurately controlled, and further, the medium flow passing through the pump can be controlled.
Description
Technical Field
The invention relates to the technical field of rotor gear metering pumps, in particular to a rotor gear metering pump and a method for controlling the rotating speed regulation precision of the rotor gear metering pump.
Background
The rotor gear pump consists of an internal gear rotor and an external gear rotor. When the internal gear rotor is in work, the internal gear rotor is connected with a motor, and under the driving of the motor, the internal gear rotor drives the external gear rotor to rotate around the axis of the external gear rotor. At the inlet of the pump, the gear teeth of the internal gear rotor and the external gear rotor are separated from each other to form negative pressure to suck liquid, at the outlet of the pump, the gear teeth of the internal gear rotor and the external gear rotor are continuously embedded and meshed to extrude and output the liquid, and the change of the volume between the gear teeth of the internal gear rotor and the gear teeth of the external gear rotor is circulated in sequence, so that the material suction and the material discharge can be realized once respectively.
The existing rotor gear pump cannot realize accurate regulation and control of the rotating speed of a servo motor, so that the precision of the medium flow passing through a pump body cannot be regulated.
Disclosure of Invention
In order to solve the problems of the prior art, the invention provides a rotor gear metering pump, which comprises: a drive device and a pump body;
the driving device includes: the device comprises a circuit board, a servo motor, a single-ring potentiometer, a multi-ring potentiometer, a change-over switch, a liquid level switch, a communication interface and a power interface, wherein the servo motor, the single-ring potentiometer, the multi-ring potentiometer, the change-over switch, the liquid level switch, the communication interface and the power interface are respectively electrically connected with the circuit board;
and the output end of the servo motor is connected with the pump body.
Further, the pump body includes: a pump housing, a rotor shaft, an internal gear rotor, and an external gear rotor;
the output end of the servo motor is connected with an external magnetic drive, and a shielding case is connected in the external magnetic drive;
the internal gear rotor cover is in on the rotor shaft, and with rotor shaft fixed connection, external gear rotor cover is in on the internal gear rotor, and with the internal gear rotor meshing, external gear rotor with the equal swing joint of internal gear rotor is in the pump housing, the one end of rotor shaft stretches out the pump housing to can dismantle and be connected with interior magnet steel, interior magnet steel is located in the cage, with outer magnetic-drive magnetic coupling, feed liquor hole and play liquid hole have been seted up on the pump housing body lateral wall.
Furthermore, the shell of the servo motor is connected with the shell of the pump body, and the external magnetic drive is fixedly connected with the rotating shaft of the servo motor.
Still further, the shield can comprises: a circular cover bottom, a pressing plate is fixedly connected on the side wall of one end of the circular cover bottom, which is provided with an opening,
a groove is formed in the shell of the pump body, a first through hole is formed in the groove, a pressing plate of the isolation cover is fixedly connected into the groove, the position of the circular cover bottom corresponds to that of the first through hole, the pump body connecting shell is detachably connected with the shell of the servo motor, and the circular cover bottom of the isolation cover is located in the outer magnetic drive;
the inner magnetic steel is positioned in the circular cover bottom through the first through hole.
Further, the circuit board has a model number of VSY3AC220S-RH.
Furthermore, an external control analog output interface, an external control power supply and a communication terminal interface which are electrically connected with an external computer are arranged on the circuit board respectively;
the circuit board is provided with a power supply/motor interface electrically connected with the servo motor and a power supply, and the circuit board is provided with a motor feedback end interface electrically connected with the servo motor.
A method of controlling rotor gear pump rotational speed, comprising:
the manual control or the remote control is switched by a selector switch;
if the control is remote control, the corresponding rotating speed of the servo motor is input to an external computer, so that the rotating speed adjustment of the rotor gear pump is realized;
if the control is manual, the control method comprises a coarse adjustment process and a fine adjustment process of the rotating speed of the rotor gear pump;
in the coarse adjustment process, the integral multiple of the rotating speed of the servo motor is adjusted by rotating the single-turn potentiometer;
in the fine adjustment process, the rotation speed of the servo motor is adjusted in a fractional multiple mode by rotating the multi-turn potentiometer and matching with the coarse adjustment process.
Furthermore, the principle of the coarse adjustment process is that the voltage range is adjusted by giving the voltage through a potentiometer with low resolution;
the principle of the fine adjustment process is that a potentiometer with high precision and resolution is used for carrying out fine adjustment again on a given number after the potentiometer is coarsely adjusted.
The technical scheme provided by the invention has the beneficial effects that: through the change over switch who sets up, can realize scene and long-range operating condition control to the rotor gear pump, when at the on-the-spot state, the coarse regulation and control is realized to servo motor's rotational speed to the single circle potentiometre that the accessible set up, through on the basis of coarse regulation, can realize the meticulous regulation and control to servo motor rotational speed through the many circles potentiometers that set up, and then through the rotational speed of control servo motor, realize the rotational speed regulation to the pump body, finally realize the medium flow regulation to passing through the pump body.
Drawings
FIG. 1 is a schematic view of the overall structure of a rotor gear pump according to the present invention;
FIG. 2 is a schematic wiring diagram of the diverter switch and level switch provided by the present invention;
FIG. 3 is a schematic diagram of the motor/power wiring provided by the present invention;
FIG. 4 is a schematic diagram of the external power supply provided by the present invention;
FIG. 5 is a schematic diagram of the internal power supply provided by the present invention;
FIG. 6 is a schematic diagram of a potentiometer adjustment circuit provided by the present invention;
fig. 7 is a schematic diagram of the constant current source regulation provided by the present invention.
Reference numerals:
the device comprises a pump body 1, a servo motor shell 2, a change-over switch 3, a single-ring potentiometer 4, a multi-ring potentiometer 5, a liquid level switch 6 and a communication interface 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the present solution provides a rotor gear metering pump comprising: a drive device and a pump body 1;
the driving device includes: the device comprises a circuit board, a servo motor, a single-ring potentiometer 4, a multi-ring potentiometer 5, a selector switch 3, a liquid level switch 8, a communication interface 6 and a power interface 7, wherein the servo motor, the single-ring potentiometer, the multi-ring potentiometer, the selector switch 3, the liquid level switch 8, the communication interface 6 and the power interface 7 are respectively electrically connected with the circuit board;
and the output end of the servo motor is connected with the pump body.
The main invention of the scheme is that the working state of the rotor gear pump can be controlled on site and remotely through the arranged selector switch, when the rotor gear pump is in the site state, the rotating speed of the servo motor can be roughly regulated through the arranged single-ring potentiometer, the rotating speed of the servo motor can be finely regulated through the arranged multi-ring potentiometer on the basis of rough regulation, the rotating speed of the servo motor is further regulated through controlling the rotating speed of the servo motor, and finally the medium flow passing through the pump body is regulated.
In an embodiment of the present invention, the pump body 1 includes: a pump housing, a rotor shaft, an internal gear rotor, and an external gear rotor;
the output end of the servo motor is connected with an external magnetic drive, and an isolation hood is connected in the external magnetic drive;
the internal gear rotor cover is in on the rotor shaft, and with rotor shaft fixed connection, external gear rotor cover is in on the internal gear rotor, and with the internal gear rotor meshing, external gear rotor with the equal swing joint of internal gear rotor is in the pump housing, the one end of rotor shaft stretches out the pump housing to can dismantle and be connected with interior magnet steel, interior magnet steel is located in the cage, with outer magnetic-drive magnetic coupling, feed liquor hole and play liquid hole have been seted up on the pump housing body lateral wall.
In an embodiment of the present invention, the housing 2 of the servo motor is connected to the housing of the pump body 1, and the external magnetic drive is fixedly connected to the rotating shaft of the servo motor.
In an embodiment of the present invention, the isolation cover includes: a circular cover bottom, wherein the side wall of one end of the circular cover bottom, which is provided with an opening, is fixedly connected with a pressing plate,
a groove is formed in the shell of the pump body 1, a first through hole is formed in the groove, a pressing plate of the isolation cover is fixedly connected in the groove, the position of the circular cover bottom corresponds to that of the first through hole, the pump body connecting shell is detachably connected with the shell of the servo motor, and the circular cover bottom of the isolation cover is located in the outer magnetic drive;
the inner magnetic steel is positioned in the circular cover bottom through the first through hole.
In an embodiment of the invention, the circuit board has a model number of VSY3AC220S-RH (i.e. controller).
In one embodiment of the invention, the circuit board is provided with an external control analog output interface, an external control power supply and a communication terminal interface which are electrically connected with an external computer respectively;
the circuit board is provided with a power supply/motor interface electrically connected with the servo motor and a power supply, and the circuit board is provided with a motor feedback end interface electrically connected with the servo motor.
Wherein, the power/motor terminal interface defines:
the communication terminal interface defines:
the motor feedback end interface defines:
external control analog input interface and DIO definition:
defining an external control power output interface:
fig. 2 is a schematic diagram of connection between an external selector switch and a liquid level switch and a circuit board, where the liquid level switch is mainly used to detect a change in the liquid level of a medium in the process of delivering the medium by the pump body, and when the liquid level of the medium is lower than a predetermined level, the pump body is not in operation, so as to protect the pump body; the function of the change-over switch is to control the control selection of the pump body manually or remotely.
FIG. 4 is a schematic diagram of external power supply control during analog voltage output control:
the input maximum allowable input voltage is ± 10V. The input impedance is 10K omega.
When a simple command circuit is formed using a Variable Resistor (VR) and a resistor (R), the connection is pressed. When the variable range of each input is-10V to +10V, it is required to set VR to 2K omega characteristic 1/2W or more and R to 200 omega 1/2W or more.
The resolution of the input AD converter is 12bit.
FIG. 5 is a schematic diagram of internal power supply control during analog voltage output control:
analog input coarse + fine description:
r1 and R2 are set to be more than 3K omega 1/4W, the larger the value is, the smaller the fine tuning range is, and the recommended value is 10K omega.
Please set the RC coarse tuning potentiometer to a single-turn potentiometer with a characteristic of 2K Ω being 1/2W or more, and the recommended value is 10K Ω.
Please set the RX fine tuning potentiometer to a multi-turn potentiometer with a characteristic of 5K Ω being 1/4W or more, and the recommended value is 10K Ω.
FIG. 6 shows the regulation by a potentiometer when an analog current of 0/4 to 20mA is inputted, and FIG. 7 shows the regulation by a constant current source when an analog current of 0/4 to 20mA is inputted:
the input maximum allowable input current range is +/-20 mA, and the input impedance is 75 omega.
A variable resistor series input, or a constant current source input is used.
The resolution of the input AD converter is 12 bits.
The function is used for remote analog control, the current control can be input in the forward direction and the reverse direction, the default forward input is realized, the forward input motor rotates in the forward direction, the reverse input motor rotates in the reverse direction, zero offset parameters can be modified and debugged, and the forward input can also achieve the purpose of reverse rotation.
A method of controlling the rotational speed of a gerotor gear pump comprising:
the manual control or the remote control is switched through a selector switch;
if the control is remote control, the corresponding rotating speed of the servo motor is input to an external computer, so that the rotating speed adjustment of the rotor gear pump is realized;
if the control is manual, the coarse adjustment process and the fine adjustment process of the rotating speed of the rotor gear pump are included;
in the coarse adjustment process, the integral multiple of the rotating speed of the servo motor is adjusted by rotating the single-turn potentiometer;
in the fine adjustment process, the rotation speed of the servo motor is adjusted in a fractional multiple mode by rotating the multi-turn potentiometer and matching with the coarse adjustment process.
In one embodiment of the invention, the principle of the coarse adjustment process is that the voltage range is adjusted by giving the voltage through a low-resolution potentiometer;
the principle of the fine adjustment process is that a potentiometer with high precision and resolution is used for carrying out fine adjustment again on a given number after the potentiometer is coarsely adjusted.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A gerotor gear metering pump, the gerotor gear pump comprising: a drive device and a pump body;
the driving device includes: the device comprises a circuit board, a servo motor, a single-ring potentiometer, a multi-ring potentiometer, a change-over switch, a liquid level switch, a communication interface and a power interface, wherein the servo motor, the single-ring potentiometer, the multi-ring potentiometer, the change-over switch, the liquid level switch, the communication interface and the power interface are respectively electrically connected with the circuit board;
and the output end of the servo motor is connected with the pump body.
2. The gerotor gear metering pump of claim 1, wherein the pump body comprises: a pump housing, a rotor shaft, an internal gear rotor, and an external gear rotor;
the output end of the servo motor is connected with an external magnetic drive, and a shielding case is connected in the external magnetic drive;
the inner gear rotor is sleeved on the rotor shaft and fixedly connected with the rotor shaft, the outer gear rotor is sleeved on the inner gear rotor and meshed with the inner gear rotor, the outer gear rotor and the inner gear rotor are movably connected in the pump shell, one end of the rotor shaft extends out of the pump shell, and is detachably connected with inner magnetic steel, the inner magnetic steel is located in the isolation cover and is coupled with the outer magnetic drive magnetic force, and a liquid inlet hole and a liquid outlet hole are formed in the side wall of the pump shell.
3. The gerotor gear metering pump of claim 2, wherein the housing of the servo motor is connected to the housing of the pump body, and the outer magnetic drive is fixedly connected to the shaft of the servo motor.
4. The gerotor gear metering pump of claim 2, wherein the cage comprises: a circular cover bottom, wherein the side wall of one end of the circular cover bottom, which is provided with an opening, is fixedly connected with a pressing plate,
a groove is formed in the shell of the pump body, a first through hole is formed in the groove, a pressing plate of the isolation cover is fixedly connected into the groove, the position of the circular cover bottom corresponds to that of the first through hole, the pump body connecting shell is detachably connected with the shell of the servo motor, and the circular cover bottom of the isolation cover is located in the outer magnetic drive;
the inner magnetic steel is positioned in the circular cover bottom through the first through hole.
5. The gerotor gear metering pump of claim 1, wherein the circuit board is of the type VSY3AC220S-RH.
6. A rotor gear pump according to claim 1, wherein the circuit board is provided with an external control analog output interface, an external control power supply and a communication terminal interface which are electrically connected with an external computer respectively;
the circuit board is provided with a power supply/motor interface electrically connected with the servo motor and a power supply, and the circuit board is provided with a motor feedback end interface electrically connected with the servo motor.
7. A method for controlling the precision of the rotation speed regulation of a rotor gear metering pump is characterized by comprising the following steps:
the manual control or the remote control is switched by a selector switch;
if the control is remote control, the corresponding rotating speed of the servo motor is input to an external computer, so that the rotating speed adjustment of the rotor gear pump is realized;
if the control is manual, the control method comprises a coarse adjustment process and a fine adjustment process of the rotating speed of the rotor gear pump;
in the coarse adjustment process, the integral multiple of the rotating speed of the servo motor is adjusted by rotating the single-turn potentiometer;
in the fine adjustment process, the rotation speed of the servo motor is adjusted in a fractional multiple mode by rotating the multi-turn potentiometer and matching with the coarse adjustment process.
8. The method for controlling the rotating speed regulating precision of the rotor gear metering pump according to claim 7, wherein the rough regulation process is based on the principle that voltage range regulation is realized by a low-resolution potentiometer for setting the voltage;
the principle of the fine adjustment process is that a potentiometer with high precision and resolution is used for carrying out fine adjustment again on a given number after the potentiometer is coarsely adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210877536.6A CN115143102A (en) | 2022-07-25 | 2022-07-25 | Rotor gear metering pump and method for controlling rotating speed regulation precision thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210877536.6A CN115143102A (en) | 2022-07-25 | 2022-07-25 | Rotor gear metering pump and method for controlling rotating speed regulation precision thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115143102A true CN115143102A (en) | 2022-10-04 |
Family
ID=83414568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210877536.6A Pending CN115143102A (en) | 2022-07-25 | 2022-07-25 | Rotor gear metering pump and method for controlling rotating speed regulation precision thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115143102A (en) |
-
2022
- 2022-07-25 CN CN202210877536.6A patent/CN115143102A/en active Pending
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