CN219301712U - Gear flow sensor - Google Patents
Gear flow sensor Download PDFInfo
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- CN219301712U CN219301712U CN202320113138.7U CN202320113138U CN219301712U CN 219301712 U CN219301712 U CN 219301712U CN 202320113138 U CN202320113138 U CN 202320113138U CN 219301712 U CN219301712 U CN 219301712U
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Abstract
The utility model discloses a gear flow sensor, which comprises a shell, a first gear and a second gear which are rotatably connected in the shell, wherein the first gear is meshed with the second gear, a cavity with a fixed volume is formed between the first gear and the shell, and a fluid inlet and a fluid outlet are respectively arranged on the shell; the gear flow sensor further comprises an inductance sensor which is arranged in the shell or outside the shell and is used for detecting the rotation number of the first gear or the second gear. The utility model is applied to the field of fluid flow measurement, not only remarkably improves the accuracy of fluid flow measurement, but also has simple structure and small occupied space, and simultaneously has interchangeability of parts, convenient and quick replacement and no complicated replacement process.
Description
Technical Field
The utility model relates to the technical field of fluid flow measurement, in particular to a gear flow sensor.
Background
The flow sensor for detecting the flow of the fluid is divided into a turbine type flow sensor and a gear type flow sensor at present, and the main principle of the two types of flow sensors is that under the action of the fluid, an impeller/gear is stressed to rotate, and magnetic steel is arranged on the impeller/gear, so that magnetic force lines are generated by periodically cutting an electromagnet through rotation, magnetic flux of a coil is changed, an alternating signal is generated, and then the flow of the fluid is calculated through the frequency of the signal. However, the detection mode is indirect induction, is greatly influenced by the material of the sensor and the interference of the surrounding environment, has the limitation of impeller/gear processing, can only install 1 to 2 magnetic steels for each impeller/gear in order to avoid the interference problem, has the signal distortion phenomenon when detecting too small pulse signals, and also has the problem that the magnetic steels are damaged/fall off in the detection process, so that the signals cannot be accurately recorded and sent.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the gear flow sensor which not only remarkably improves the accuracy of fluid flow measurement, but also has the advantages of simple structure, small occupied space, interchangeability of parts, convenience and rapidness in replacement and no complicated replacement process.
In order to achieve the above purpose, the utility model provides a gear flow sensor, which comprises a shell, a first gear and a second gear which are rotatably connected in the shell, wherein the first gear is meshed with the second gear, a cavity with a fixed volume is formed between the first gear and the shell, and a fluid inlet and a fluid outlet are respectively arranged on the shell;
the gear flow sensor further comprises an inductance sensor which is arranged in the shell or outside the shell and is used for detecting the rotation number of the first gear or the second gear.
In one embodiment, the inductance sensor is fixedly arranged on the shell, a detection end of the inductance sensor faces to a tooth surface of the first gear or the tooth surface of the second gear, and a signal end of the inductance sensor is located outside the shell.
In one embodiment, a first sealing structure is arranged between the inductance sensor and the housing.
In one embodiment, the gear flow sensor further comprises a first pin and a first driven gear;
one end of the first pin shaft is positioned outside the shell and connected with the first driven gear, and the other end of the first pin shaft is positioned inside the shell and connected with the first gear or the second gear;
the inductance sensor is arranged outside the shell, and the detection end of the inductance sensor faces the tooth surface of the first driven gear.
In one embodiment, a second sealing structure is arranged between the first pin shaft and the shell.
In one embodiment, the gear flow sensor further comprises a second pin, a second driven gear, a third pin and a third driven gear;
one end of the second pin shaft is positioned outside the shell and connected with the second driven gear, and the other end of the second pin shaft is positioned inside the shell and connected with the first gear;
one end of the third pin shaft is positioned outside the shell and connected with the third driven gear, and the other end of the third pin shaft is positioned inside the shell and connected with the second gear;
the number of the inductance sensors is two, the inductance sensors are arranged outside the shell, the detection end of one inductance sensor faces the tooth surface of the second driven gear, and the detection end of the other inductance sensor faces the tooth surface of the third driven gear.
In one embodiment, a third sealing structure is arranged between the second pin shaft and the shell.
In one embodiment, a fourth sealing structure is arranged between the third pin shaft and the shell.
In one embodiment, the fluid inlet and the fluid outlet are respectively positioned at two ends of the shell.
In one embodiment, the first gear has the same number of teeth as the second gear.
The utility model has the following beneficial technical effects:
1. compared with the prior art that only 1 to 2 magnetic steels can be arranged on each gear to avoid the interference problem when the magnetic steels are arranged on the gears, the utility model directly detects the number of the gear teeth by using the inductive sensor, and has the problems that the number of detected pulse signals is too small and the signal distortion phenomenon exists;
2. compared with the prior art that when the magnetic steel is installed on the gear, the magnetic steel can only be installed on the top end of the gear due to the processing limitation of the gear, so that the problem of overlarge occupied space and limited installation is solved;
3. compared with the prior art, when the internal magnetic steel of the sensor is damaged/falls off, the sensor is required to be integrally disassembled for replacement, so that the problem that the maintenance process of the sensor is too complicated is solved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view showing the internal structure of a gear flow sensor according to embodiment 1 of the present utility model;
FIG. 2 is a cross-sectional view showing the internal structure of the gear flow sensor according to embodiment 2 and embodiment 3 of the present utility model;
FIG. 3 is a front view of a gear flow sensor according to embodiment 2 of the present utility model;
fig. 4 is a front view of a gear flow sensor in embodiment 3 of the present utility model.
Reference numerals: the device comprises a shell 1, a fluid inlet 101, a fluid outlet 102, a first gear 2, a first rotating shaft 201, a second gear 3, a second rotating shaft 301, a cavity 4, an inductance sensor 5, a first pin 6, a first driven gear 7, a second pin 8, a second driven gear 9, a third pin 10 and a third driven gear 11.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; the device can be mechanically connected, electrically connected, physically connected or wirelessly connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.
Example 1
Fig. 1 shows a gear flow sensor disclosed in this embodiment, which mainly includes a housing 1, a first gear 2 and a second gear 3. The first gear 2 is rotationally connected inside the shell 1 through the first rotating shaft 201, the second gear 3 is rotationally connected inside the shell 1 through the second rotating shaft 301, the first gear 2 and the second gear 3 are meshed with each other and have the same tooth number, meanwhile, a cavity 4 with a fixed volume of V is enclosed between the first gear 2, the second gear 3 and the shell 1, two ends of the shell 1 are respectively provided with a fluid inlet 101 and a fluid outlet 102, the fluid inlet 101 is communicated with the cavity 4 on one side of a meshing point of the first gear 2 and the second gear 3, and the fluid outlet 102 is communicated with the cavity 4 on the other side of the meshing point of the first gear 2 and the second gear 3.
In this embodiment, the gear flow sensor further includes an inductance sensor 5, the inductance sensor 5 is fixedly disposed on the housing 1, and a detection end of the inductance sensor 5 faces a tooth surface of the first gear 2 or the second gear 3 to be used for detecting a rotation number of the first gear 2 or the second gear 3, and a signal end of the inductance sensor 5 is located outside the housing 1 to be used for outputting a detection signal. Specifically, the inductive sensor 5 generates a high-frequency magnetic field through the internal coil oscillator, and sends the high-frequency magnetic field outwards through the sensing surface of the detection end, and when the first gear 2 or the second gear 3 rotates, because the tooth space exists between every two adjacent teeth on the first gear 2 or the second gear 3, pulse signals are generated when adjacent tooth tops pass through the magnetic field of the inductive sensor 5, and the number of signals detected by each rotation of the first gear 2 or the second gear 3 is equal to the number of teeth of the first gear 2 or the second gear 3. In a specific application process, the inductance sensor 5 may be a sensor model existing in the market, and its specific implementation structure and circuit principle are all conventional technologies in the field, so that the description of this embodiment is omitted.
The working principle of the gear flow sensor in the embodiment is as follows:
when fluid enters the housing 1 through the fluid inlet 101, the first gear 2 and the second gear 3 rotate under the pushing of the entering fluid and carry out fluid through the fluid outlet 102, and assuming that the number of pulse signals in unit time detected by the inductance sensor 5 is z, the number of times n of rotation of the first gear 2 or the second gear 3 in unit time can be calculated, and each time the first gear 2 or the second gear 3 rotates, two fluids with fixed volumes V are carried out, so that the volume Q of the fluid in unit time can be obtained, which is:
n＝z/c
Q＝2×n×V
wherein c is the number of teeth of the first gear 2 or the second gear 3.
As a preferred embodiment, a first sealing structure is provided between the inductive sensor 5 and the housing 1, for example, a sealing rubber ring may be used as the first sealing structure, so as to avoid fluid in the cavity 4 from seeping out from the connection gap between the inductive sensor 5 and the housing 1.
It should be noted that, although the gear in which the detection end of the inductance sensor 5 faces the first gear 2 is illustrated in the present embodiment, the application is not limited thereto, and the detection end of the inductance sensor 5 may be disposed to face the tooth surface of the second gear 3. Or two inductance sensors 5 may be disposed, and the detection ends of the two inductance sensors 5 face the tooth surfaces of the first gear 2 and the second gear 3 respectively, and finally two volumes Q are calculated and averaged according to the above formula, so as to obtain the volume of the fluid in unit time.
Example 2
Fig. 2 and 3 show a gear flow sensor according to the present embodiment, which mainly includes a housing 1, a first gear 2 and a second gear 3. The first gear 2 is rotationally connected inside the shell 1 through the first rotating shaft 201, the second gear 3 is rotationally connected inside the shell 1 through the second rotating shaft 301, the first gear 2 and the second gear 3 are meshed with each other and have the same tooth number, meanwhile, a cavity 4 with a fixed volume of V is enclosed between the first gear 2, the second gear 3 and the shell 1, two ends of the shell 1 are respectively provided with a fluid inlet 101 and a fluid outlet 102, the fluid inlet 101 is communicated with the cavity 4 on one side of a meshing point of the first gear 2 and the second gear 3, and the fluid outlet 102 is communicated with the cavity 4 on the other side of the meshing point of the first gear 2 and the second gear 3.
In this embodiment, the gear flow sensor further includes an inductance sensor 5, a first pin shaft 6 and a first driven gear 7, where the inductance sensor 5 is fixedly disposed outside the housing 1, one end of the first pin shaft 6 is located outside the housing 1 and is coaxially connected with the first driven gear 7 through a key, and the other end is located in the housing 1 and is fixedly connected with the first rotating shaft 201 on the first gear 2 or the second rotating shaft 301 on the second gear 3 through a coupling or a welding or integrated forming manner. The detection end of the inductance sensor 5 faces the tooth surface of the first driven gear 7 for detecting the number of rotations of the first driven gear 7. Specifically, the inductive sensor 5 generates a high-frequency magnetic field through the internal coil oscillator, and sends the high-frequency magnetic field outwards through the sensing surface of the detection end, and when the first driven gear 7 rotates, because the tooth space exists between every two adjacent teeth on the first driven gear 7, pulse signals are generated when adjacent tooth tops pass through the magnetic field of the inductive sensor 5, and the number of signals detected by the rotation of the first driven gear 7 is equal to the number of teeth of the first driven gear 7. In a specific application process, the inductance sensor 5 may be a sensor model existing in the market, and its specific implementation structure and circuit principle are all conventional technologies in the field, so that the description of this embodiment is omitted.
The working principle of the gear flow sensor in the embodiment is as follows:
when fluid enters the housing 1 through the fluid inlet 101, the first gear 2 and the second gear 3 rotate under the pushing of the entering fluid, and the fluid is carried out through the fluid outlet 102, and simultaneously the first pin 6 and the first driven gear 7 are driven to rotate. Assuming that the number of pulse signals detected by the inductive sensor 5 in a unit time is z, the number of times n of rotation of the first driven gear 7 in the unit time can be calculated, the number of rotation turns of the first driven gear 7 is the same as that of the first gear 2 and the second gear 3, and each time the first gear 2 or the second gear 3 rotates for one turn, two fluids with fixed volumes V are brought out, so that the volume Q of the fluid in the unit time can be obtained, and the method is as follows:
n＝z/c
Q＝2×n×V
where c is the number of teeth of the first driven gear 7.
As a preferred embodiment, a second sealing structure is provided between the first pin 6 and the housing 1, for example, a sealing rubber ring may be used as the second sealing structure, so as to avoid fluid in the cavity 4 from seeping out from the connection gap between the first pin 6 and the housing 1.
Example 3
Fig. 2 and 4 show a gear flow sensor according to the present embodiment, which mainly includes a housing 1, a first gear 2 and a second gear 3. The first gear 2 is rotationally connected inside the shell 1 through the first rotating shaft 201, the second gear 3 is rotationally connected inside the shell 1 through the second rotating shaft 301, the first gear 2 and the second gear 3 are meshed with each other and have the same tooth number, meanwhile, a cavity 4 with a fixed volume of V is enclosed between the first gear 2, the second gear 3 and the shell 1, two ends of the shell 1 are respectively provided with a fluid inlet 101 and a fluid outlet 102, the fluid inlet 101 is communicated with the cavity 4 on one side of a meshing point of the first gear 2 and the second gear 3, and the fluid outlet 102 is communicated with the cavity 4 on the other side of the meshing point of the first gear 2 and the second gear 3.
In this embodiment, the gear flow sensor further includes an inductance sensor 5, a second pin shaft 8, a second driven gear 9, a third pin shaft 10, and a third driven gear 11, where one end of the second pin shaft 8 is located outside the housing 1 and coaxially connected with the second driven gear 9 through a key, and the other end is located inside the housing 1 and fixedly connected with the first rotating shaft 201 on the first gear 2 through a coupling or a welding or integral forming manner; one end of the third pin shaft 10 is located outside the shell 1 and is coaxially connected with the third driven gear 11 through a key, and the other end of the third pin shaft is located inside the shell 1 and is fixedly connected with the second rotating shaft 301 on the second gear 3 through a coupler or a welding or integral forming mode. The number of the inductance sensors 5 is two and the inductance sensors are all arranged outside the shell 1, wherein the detection end of one inductance sensor 5 faces the tooth surface of the second driven gear 9, and the detection end of the other inductance sensor 5 faces the tooth surface of the third driven gear 11 so as to be used for respectively detecting the rotation turns of the second driven gear 9 and the third driven gear 11. Specifically, the inductive sensor 5 generates a high-frequency magnetic field through the internal coil oscillator, and sends the high-frequency magnetic field outwards through the sensing surface of the detection end, and when the second driven gear 9 and the third driven gear 11 rotate, because the tooth space exists between every two adjacent teeth on the second driven gear 9 and the third driven gear 11, pulse signals are generated when adjacent tooth tops pass through the magnetic field of the inductive sensor 5, and the number of signals detected by the second driven gear 9 and the third driven gear 11 rotating for one circle corresponding to the inductive sensor 5 is equal to the number of teeth of the second driven gear 9 and the third driven gear 11. In a specific application process, the inductance sensor 5 may be a sensor model existing in the market, and its specific implementation structure and circuit principle are all conventional technologies in the field, so that the description of this embodiment is omitted.
The working principle of the gear flow sensor in the embodiment is as follows:
when fluid enters the housing 1 through the fluid inlet 101, the first gear 2 and the second gear 3 rotate under the pushing of the entering fluid, and the fluid is carried out through the fluid outlet 102, and simultaneously the second pin 8, the second driven gear 9, the third pin 10 and the third driven gear 11 are driven to rotate. Assume that the pulse signal quantity in the unit time detected by the two inductive sensors 5 is z 1 、z 2 The number of rotations n of the second driven gear 9 and the third driven gear 11 per unit time can be calculated 1 、n 2 The number of turns of the second driven gear 9 and the third driven gear 11 is the same as that of the first gear 2 and the second gear 3, and the fluid with two fixed volumes V is brought out after each turn of the first gear 2 or the second gear 3, so that the volume Q of the fluid in unit time can be obtained, and the volume Q is as follows:
n 1 ＝z 1 /c 1
n 2 ＝z 2 /c 2
Q＝(2×n 1 ×V+2×n 2 ×V)/2＝(n 1 +n 2 )×V
wherein c 1 For the number of teeth, c, of the second driven gear 9 2 The number of teeth of the third driven gear 11.
As a preferred embodiment, a third sealing structure and a fourth sealing structure are respectively arranged between the second pin 8 and the housing 1 and between the third pin 10 and the housing 1, for example, a sealing rubber ring can be adopted as the third sealing structure and the fourth sealing structure, so as to avoid fluid in the cavity 4 from seeping out from the connecting gaps between the second pin 8, the third pin 10 and the housing 1.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. The gear flow sensor comprises a shell, a first gear and a second gear which are rotatably connected in the shell, wherein the first gear is meshed with the second gear, a cavity with a fixed volume is formed between the first gear and the shell, and a fluid inlet and a fluid outlet are respectively arranged on the shell;
the device is characterized by further comprising an inductance sensor, wherein the inductance sensor is arranged in the shell or outside the shell and is used for detecting the rotation number of the first gear or the second gear.
2. The gear flow sensor of claim 1, wherein the inductive sensor is fixedly disposed on the housing with a sensing end of the inductive sensor facing a tooth surface of the first gear or the second gear, and a signal end of the inductive sensor is located outside the housing.
3. The gear flow sensor of claim 2, wherein a first seal is provided between the inductive sensor and the housing.
4. The gear flow sensor of claim 1, further comprising a first pin and a first driven gear;
one end of the first pin shaft is positioned outside the shell and connected with the first driven gear, and the other end of the first pin shaft is positioned inside the shell and connected with the first gear or the second gear;
the inductance sensor is arranged outside the shell, and the detection end of the inductance sensor faces the tooth surface of the first driven gear.
5. The gear flow sensor of claim 4, wherein a second seal is provided between the first pin and the housing.
6. The gear flow sensor of claim 1, further comprising a second pin, a second driven gear, a third pin, and a third driven gear;
one end of the second pin shaft is positioned outside the shell and connected with the second driven gear, and the other end of the second pin shaft is positioned inside the shell and connected with the first gear;
one end of the third pin shaft is positioned outside the shell and connected with the third driven gear, and the other end of the third pin shaft is positioned inside the shell and connected with the second gear;
the number of the inductance sensors is two, the inductance sensors are arranged outside the shell, the detection end of one inductance sensor faces the tooth surface of the second driven gear, and the detection end of the other inductance sensor faces the tooth surface of the third driven gear.
7. The gear flow sensor of claim 6, wherein a third seal is provided between the second pin and the housing.
8. The gear flow sensor of claim 6, wherein a fourth sealing structure is provided between the third pin and the housing.
9. The gear flow sensor of any of claims 1 to 8, wherein the fluid inlet and the fluid outlet are located at respective ends of the housing.
10. The gear flow sensor of any of claims 1 to 8, wherein the first gear has the same number of teeth as the second gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320113138.7U CN219301712U (en) | 2023-01-16 | 2023-01-16 | Gear flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320113138.7U CN219301712U (en) | 2023-01-16 | 2023-01-16 | Gear flow sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219301712U true CN219301712U (en) | 2023-07-04 |
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ID=86984065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320113138.7U Active CN219301712U (en) | 2023-01-16 | 2023-01-16 | Gear flow sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219301712U (en) |
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2023
- 2023-01-16 CN CN202320113138.7U patent/CN219301712U/en active Active
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