CN112461544A - Axial position detector - Google Patents
Axial position detector Download PDFInfo
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- CN112461544A CN112461544A CN202011289192.4A CN202011289192A CN112461544A CN 112461544 A CN112461544 A CN 112461544A CN 202011289192 A CN202011289192 A CN 202011289192A CN 112461544 A CN112461544 A CN 112461544A
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- iron core
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000006073 displacement reaction Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000002955 isolation Methods 0.000 claims abstract description 21
- 230000005284 excitation Effects 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 238000012545 processing Methods 0.000 claims description 17
- 230000001939 inductive effect Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention provides an axis position detector, which comprises a magnetic circuit closed loop type inductive displacement sensor, wherein the magnetic circuit closed loop type inductive displacement sensor comprises a constant current output end, the magnetic circuit closed loop type inductive displacement sensor comprises a magnetic conduction sleeve arranged on a magnetic conduction sensing seat and a flange type isolation sleeve fixed on a shielding pump body, the magnetic conduction sleeve is sleeved outside the flange type isolation sleeve, a sensing iron core is positioned inside the flange type isolation sleeve, an excitation coil is arranged in the magnetic conduction sleeve, and a linear Hall sensor is coaxially and fixedly arranged on the magnetic conduction sensing seat and the sensing iron core; and the linear Hall sensor outputs corresponding linear voltage VH according to the magnetic field intensity change induced by the distance change between the linear Hall sensor and the sensing iron core when the sensing iron core moves axially along with the transmission shaft of the shield pump. By adopting the technical scheme of the invention, the axial displacement of the transmission shaft in the operation of the canned motor pump can be monitored in real time.
Description
Technical Field
The invention relates to the technical field of detection of bearings of shield pumps, in particular to an axial position detector.
Background
With the enhancement of environmental awareness of the whole society, leakage-free pumps such as canned motor pumps are widely applied in various industries. The nature of the canned motor pump determines the use of sliding bearings, and one key technique is to balance the axial forces of the transmission components, namely: the axial displacement of the transmission shaft must operate within a specified range; in the use process, once the axial force is out of balance, the canned motor pump can be rapidly damaged, and great economic loss can be caused for chemical enterprises.
Disclosure of Invention
In view of the above-mentioned technical problems, an axial position detecting apparatus is provided.
The technical means adopted by the invention are as follows:
an axial line position detector comprises a magnetic circuit closed loop type inductive displacement sensor, wherein the magnetic circuit closed loop type inductive displacement sensor comprises a constant current output end, the magnetic circuit closed loop type inductive displacement sensor comprises a magnetic conduction sleeve pipe and a flange type isolation sleeve, the magnetic conduction sleeve pipe is arranged on the outer portion of the flange type isolation sleeve, a sensing iron core is arranged inside the flange type isolation sleeve, an excitation coil is arranged in the magnetic conduction sleeve pipe, the sensing iron core is arranged inside the flange type isolation sleeve and is positioned in the center of the excitation coil, a linear Hall sensor is coaxially and fixedly arranged on the magnetic conduction sensing seat and the sensing iron core, the constant current output end is connected to two lead wires of the excitation coil, a uniform magnetic field is arranged on the sensing iron core, and the maximum distance between the end face, close to the magnetic conduction sensing seat, of the sensing iron core and the linear Hall sensor is 12mm, the other end of the sensing iron core is connected to a measuring rod through a connector, and the measuring rod is fixedly arranged on a transmission shaft of the shield pump;
the canned motor pump is characterized in that the canned motor pump transmission shaft is arranged on a canned motor pump body through a canned motor pump sliding bearing, and can simultaneously do rotary motion and axial motion in the canned motor pump body;
the linear Hall sensor outputs corresponding linear voltage VH according to the magnetic field intensity change induced by the distance change between the linear Hall sensor and the sensing iron core when the sensing iron core moves axially along with the transmission shaft of the shield pump;
the linear voltage VH is processed by the differential signal amplifier to output a voltage signal VA, and is sent to the main control circuit for operation processing to obtain distance data.
Furthermore, the main control circuit comprises a central processing unit, an A/D conversion module, a serial data transmission module and a D/A conversion module; voltage signal VA is sent to central processing unit analog voltage input pin, through AD conversion module converts the analog quantity into digital signal, central processing unit obtains distance data after carrying out operation processing with digital signal, wherein, distance data of one way passes through serial data sending module and sends to the LED display panel, carries out code conversion through the charactron driver, directly drives the charactron and carries out on-the-spot digital display and light column analog position display, another way distance data send to DA conversion module, converts digital signal into analog current signal, outputs to I/V conversion module, sends to binding post circuit after converting voltage signal into the current signal, supplies user DCS to use.
Compared with the prior art, the invention has the following advantages:
the axial position instrument provided by the invention is used for monitoring the axial displacement of the shielding pump, when the axial force of the shielding pump changes, the corresponding displacement of the pump shaft can be detected in time, the displacement data is displayed on site, and meanwhile, a corresponding 4-20 mA current signal is output for alarming and controlling; meanwhile, the device has the characteristics of isolation sealing and non-contact detection, is explosion-proof, simple and quick to debug and install, and is suitable for being used under the working conditions of flammability and explosiveness; the axial displacement (axial force) of the transmission shaft during the operation of the canned motor pump can be monitored in real time, an alarm is given immediately when the pump is overrun, the pump is stopped seriously when the pump is overrun, the sliding bearing is prevented from being damaged, and accidents are avoided; the periodic pump disassembly maintenance is omitted, the labor and the force are saved, and the economic benefit of an enterprise is improved.
Based on the reasons, the invention can be widely popularized in the fields of shield pump bearing detection and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of an axial position detector according to the present invention.
FIG. 2 is a schematic diagram of a control circuit of the axial position detector according to the present invention.
In the figure: 1. a canned motor pump body; 2. a canned motor pump slide bearing; 3. a canned motor pump drive shaft; 4. a connector; 5. a measuring rod; 6. a flange type sealing isolation sleeve; 7. a flange-type high-temperature radiator; 8. a magnetic conductive sleeve; 9. a sensor core; 10. a linear hall sensor; 11. a magnetic conductive sensing seat; 12. epoxy resin pouring sealant; 13. a window glass; 14. an LED display panel; 15. a main control circuit board; 16. a wiring terminal circuit board; 17. a field coil; 18. a coil bobbin; 19. the direction of the magnetic lines of force; 20. golan head; 21. an upper end cover; 22. a meter main housing; 23. a side end cap.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
Example 1
As shown in fig. 1, the present invention provides an axial position detector, which includes a magnetic circuit closed loop type inductive displacement sensor, wherein the magnetic circuit closed loop type inductive displacement sensor is a sensor that converts mechanical displacement into a voltage signal;
the magnetic circuit closed loop type inductive displacement sensor comprises a constant current output end, and comprises a magnetic conduction sleeve 8 arranged on a magnetic conduction sensing seat 11 and a flange type isolation sleeve 6 fixed on a shielding pump body 1, wherein the magnetic conduction sleeve 8 is sleeved outside the flange type isolation sleeve 6, a sensing iron core 9 is positioned inside the flange type isolation sleeve 6, an excitation coil 17 is arranged inside the magnetic conduction sleeve 8 through a coil framework 18, the direction of magnetic force lines is shown in figure 1 as 19, the sensing iron core 9 is positioned inside the flange type isolation sleeve 6 and in the center of the excitation coil 17, one end of the magnetic conduction sensing seat 11 is fixedly provided with a linear Hall sensor 10 coaxially arranged with the sensing iron core 9, and the other end of the magnetic conduction sensing seat is in insulation sealing connection with an instrument main shell 22 through epoxy resin pouring sealant 12;
the output end of the constant current source is connected to two leads of the excitation coil 17, a uniform magnetic field is arranged on the sensing iron core 9, the maximum distance between the end surface of the sensing iron core 9 close to the magnetic conductive sensing seat 11 and the linear hall sensor 10 is 12mm (namely the measuring range of the sensor), the other end of the sensing iron core 9 is connected to the measuring rod 5 through the connector 4, and the measuring rod 5 is fixedly installed on the transmission shaft 3 of the shield pump;
the magnetic circuit closed loop type inductive displacement sensor forms a closed loop magnetic field through the magnetic conductive sleeve 8, the sensing iron core 9, the excitation coil 17 and the magnetic conductive sensing seat 11;
the canned motor pump is characterized in that the canned motor pump transmission shaft 3 is arranged on the canned motor pump body 1 through a canned motor pump sliding bearing 2, and the canned motor pump transmission shaft 3 is supported in the canned motor pump body 1 as the canned motor pump sliding bearing 2, so that the canned motor pump transmission shaft 3 does axial motion while doing rotary motion;
the flange type isolation sleeve 6 and the shielding pump body 1 are sealed, and the excitation coil 17 is sleeved outside the flange type isolation sleeve 6 through the magnetic conduction sleeve 8, so that the magnetic circuit closed-loop type inductive displacement sensor forms an isolation sealed non-contact type axial displacement sensor;
the linear Hall sensor 10 outputs corresponding linear voltage VH according to the magnetic field intensity change induced by the distance change between the linear Hall sensor 10 when the sensing iron core 9 moves axially along with the shield pump transmission shaft 3;
specifically, the sensing iron core 9 is located on a magnetic path of a closed-loop magnetic field, the linear hall sensor 10 and the sensing iron core 9 are coaxially arranged and fixedly mounted on the magnetic conductive sensing seat 11, and when the sensing iron core 9 axially moves along with the shield pump transmission shaft 3, the distance between the sensing iron core 9 and the linear hall sensor 10 is changed, so that the magnetic field intensity sensed by the linear hall sensor 10 is also changed, and according to the hall effect principle, the linear hall sensor 10 can output a linear voltage VH corresponding to the magnetic field intensity;
since VH does not have a linear relationship with the distance, it is necessary to output a voltage signal VA after amplifying VH and zero-point correcting VH-VZ into VA by a differential signal amplifier, and to send the voltage signal VA output from the differential amplifier to a main control circuit to perform arithmetic processing to obtain distance data.
Further, as shown in fig. 2, the main control circuit includes a central processing unit, an a/D conversion module, a serial data transmission module, and a D/a conversion module; the voltage signal VA is sent to a central processing unit analog voltage input pin, analog quantity is converted into a digital signal through the A/D conversion module, the central processing unit performs operation processing on the digital signal to obtain distance data, one path of distance data is sent to the LED display panel 14 through the serial data sending module, after being subjected to code conversion through a MAX7219 nixie tube driver, the nixie tube is directly driven to perform on-site digital display and light column analog position display, the other path of distance data is sent to the D/A conversion module, the digital signal is converted into an analog current signal, the analog current signal is output to the I/V conversion module, the voltage signal is converted into a current signal of 4-20 mA, and then the current signal is sent to a 4# wiring terminal circuit for a user DCS to use.
Furthermore, the main control circuit further comprises a switching value input module, wherein the switching value input module is connected to the AH543 Hall sensing key module and used for allowing a user to input control data on site and adjusting the axial position detector.
Further, the main control circuit further comprises a switching power supply module, and the switching power supply module is connected with the on-chip voltage stabilizing module of the main control circuit while providing an excitation power supply for the linear hall sensor 10, so as to provide a voltage stabilizing power supply for the main control circuit.
Further, a side end cover 23 is arranged on the side surface of the instrument main shell 22, an upper end cover 21 is arranged on the top, and a Golan head 20 is arranged on the bottom; the LED display panel 14, the main control circuit board 15 and the wiring terminal circuit board 16 are arranged in the instrument main shell 22; the upper end cover 21 is provided with a window 13 for viewing the LED display panel 14; an LED display circuit for displaying the detected distance data is disposed on the LED display panel 14, the main control circuit is disposed on the main control circuit board 15, the connection terminal circuit is disposed on the connection terminal circuit board 16, and the layout of the LED display panel 14, the main control circuit board 15, and the connection terminal circuit board 16 inside the meter main housing 22 may be as shown in fig. 1, or may be laid out according to actual use requirements.
Furthermore, the axial position detector has three data input keys SET, a-up and a xxx, a magnetic pen is used for field operation safety, a magnetic field on the pen is induced to the AH543 Hall induction key module through the explosion-proof glass, then a signal is sent to an I/O interface of the central processing unit through the switching value input module, and the central processing unit processes input data according to the state of the interface and is used for actual operation of the instrument.
Furthermore, the axial position detector has the measuring range of 0-12.00 mm, the use temperature of-40-180 ℃, the working pressure of 0-4.0 Mpa, the power supply voltage of DC24V, the protection grade of IP65 and the explosion-proof grade of EXd II c T4 Gb.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (2)
1. The axial line position detector is characterized by comprising a magnetic circuit closed loop type inductance displacement sensor, wherein the magnetic circuit closed loop type inductance displacement sensor comprises a constant current output end, the magnetic circuit closed loop type inductance displacement sensor comprises a magnetic conduction sleeve (8) and a flange type isolation sleeve (6), the magnetic conduction sleeve (8) is installed on a magnetic conduction sensing seat (11), the flange type isolation sleeve (6) is fixed on a shielding pump body (1), the magnetic conduction sleeve (8) is sleeved outside the flange type isolation sleeve (6), a sensing iron core (9) is located inside the flange type isolation sleeve (6), an excitation coil (17) is installed in the magnetic conduction sleeve (8), the sensing iron core (9) is located inside the flange type isolation sleeve (6) and in the center of the excitation coil (17), a linear Hall sensor (10) is coaxially and fixedly installed on the magnetic conduction sensing seat (11) and the sensing iron core (9), the output end of the constant current source is connected to two leads of the excitation coil (17), a uniform magnetic field is arranged on the sensing iron core (9), the maximum distance between the end surface of the sensing iron core (9), which is close to the magnetic conductive sensing seat (11), and the linear Hall sensor (10) is 12mm, the other end of the sensing iron core (9) is connected to the measuring rod (5) through the connector (4), and the measuring rod (5) is fixedly installed on the transmission shaft (3) of the shield pump;
the canned motor pump is characterized in that the canned motor pump transmission shaft (3) is mounted on a canned motor pump body (1) through a canned motor pump sliding bearing (2), and the canned motor pump transmission shaft (3) can simultaneously do rotary motion and axial motion in the canned motor pump body (1);
the linear Hall sensor (10) outputs corresponding linear voltage VH according to the magnetic field intensity change induced by the distance change between the linear Hall sensor (10) when the sensing iron core (9) moves axially along with the transmission shaft (3) of the canned motor pump;
the linear voltage VH is processed by the differential signal amplifier to output a voltage signal VA, and is sent to the main control circuit for operation processing to obtain distance data.
2. The axial position detector according to claim 1, wherein the main control circuit includes a central processing unit, an a/D conversion module, a serial data transmission module, and a D/a conversion module; voltage signal VA is sent to central processing unit analog voltage input pin, through AD conversion module converts the analog quantity into digital signal, central processing unit obtains distance data after carrying out operation processing with digital signal, wherein, distance data of one way passes through serial data sending module and sends to the LED display panel, carries out code conversion through the charactron driver, directly drives the charactron and carries out on-the-spot digital display and light column analog position display, another way distance data send to DA conversion module, converts digital signal into analog current signal, outputs to I/V conversion module, sends to binding post circuit after converting voltage signal into the current signal, supplies user DCS to use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011289192.4A CN112461544A (en) | 2020-11-17 | 2020-11-17 | Axial position detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011289192.4A CN112461544A (en) | 2020-11-17 | 2020-11-17 | Axial position detector |
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| Publication Number | Publication Date |
|---|---|
| CN112461544A true CN112461544A (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011289192.4A Pending CN112461544A (en) | 2020-11-17 | 2020-11-17 | Axial position detector |
Country Status (1)
| Country | Link |
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| CN (1) | CN112461544A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114326456A (en) * | 2021-09-18 | 2022-04-12 | 金华好哥信息技术有限公司 | System and method for controlling lifting height of airing rod |
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| CN103712547A (en) * | 2014-01-07 | 2014-04-09 | 王允学 | Bearing monitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114326456A (en) * | 2021-09-18 | 2022-04-12 | 金华好哥信息技术有限公司 | System and method for controlling lifting height of airing rod |
| CN114326456B (en) * | 2021-09-18 | 2023-10-27 | 金华好哥信息技术有限公司 | Control system and control method for lifting height of airing rod |
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Application publication date: 20210309 |