CN112362122B - Controllable mass flow meter of rotational speed - Google Patents
Controllable mass flow meter of rotational speed Download PDFInfo
- Publication number
- CN112362122B CN112362122B CN202011269762.3A CN202011269762A CN112362122B CN 112362122 B CN112362122 B CN 112362122B CN 202011269762 A CN202011269762 A CN 202011269762A CN 112362122 B CN112362122 B CN 112362122B
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- support
- impeller
- reed
- flow
- main shaft
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention relates to the technical field of mass flowmeters, and particularly discloses a mass flowmeter with controllable rotating speed, which comprises a shell, an impeller, a support and a rotating assembly, wherein the impeller, the support and the rotating assembly are assembled in the shell and coaxially mounted through a main shaft, a spiral groove capable of providing acting force for blades of the impeller and a hollow runner for direct circulation of fluid are arranged on the support, a reed capable of adjusting the opening and closing state according to the flow is also mounted on the support, and the mounting position of the reed corresponds to the position of the hollow runner of the support: when no flow or small flow exists, the reed is closed relative to the hollow runner; when the flow is large, the reed opens relative to the hollow runner; and a gasket for adjusting the distance between the impeller and the spiral groove of the support is also arranged between the impeller and the support. Therefore, the mass flowmeter can basically keep the rotating speed of the rotating assembly in the whole flow range consistent through the reed capable of adjusting the opening and closing degree according to the flow, namely the rotating speed of the mass flowmeter in the whole flow range is basically consistent, so that the stability of an output signal is improved, and the flow measurement precision is improved.
Description
Technical Field
The invention relates to the technical field of mass flowmeters, in particular to a mass flowmeter with a controllable rotating speed.
Background
The current mass flow meter can be divided into a direct type and an indirect type.
Indirect mass flowmeters have a derivative type, a temperature-pressure compensation type, etc., and the direct type has an operation principle often related to the mass (density) of a medium, that is, a signal proportional to the density-volume (ρ - ν) is directly measured. The more direct mass flowmeters that are used at present have: a mass flow meter using the coriolis principle and a thermal flow meter using the principle of heat exchange between a fluid and a solid. Mass flowmeters installed on the engine fuel lines are fuel accessories that detect the mass flow of fuel to the engine combustion chambers.
Disclosure of Invention
In order to improve the stability of output signals, the invention aims to provide a mass flowmeter with controllable rotating speed, which can basically keep the rotating speed of a rotating assembly in the whole flow range consistent through a reed capable of adjusting the opening and closing degree according to the flow, namely, the rotating speed of the mass flowmeter in the whole flow range is basically consistent, thereby improving the stability of the output signals and improving the flow measurement precision.
The invention is realized by the following technical scheme:
a mass flowmeter with controllable rotating speed comprises a shell, an impeller, a support and a rotating assembly, wherein the impeller, the support and the rotating assembly are assembled in the shell and coaxially mounted through a main shaft; be provided with the reed that can open and shut the state according to flow size adjustment on fretwork runner and the support on the support, the mounted position of reed corresponds with the fretwork runner position of support: when no flow or small flow exists, the reed is closed relative to the hollow runner; when the flow is large, the reed opens relative to the hollow runner; and a gasket for adjusting the distance between the impeller and the spiral groove of the support is also arranged between the impeller and the support.
The support of the mass flowmeter is fixed in the mass flowmeter and is provided with a spiral groove. When fluid flows through the spiral groove of the support, the spiral groove of the support changes the flowing direction of the fluid, so that the blades of the impeller obtain a moment to start rotating, and the whole rotating assembly is driven to rotate. The reed is arranged on the support, and the reed can open or close along with the increase or decrease of the fluid flow: when no flow or small flow exists, the reed is basically in a closed state, and the fluid basically flows out of the spiral groove of the support, so that the rotating speed of the impeller is increased; when the flow is large, the reed is in an opening state, and the fluid flowing out of the spiral groove of the support is relatively less, so that the rotating speed of the impeller is reduced. The impact of the fluid flow flowing through the spiral groove of the support on the impeller is controlled by the opening and closing degree of the reed at different flow rates, so that the rotating speed of the rotating assembly in the whole flow rate range is basically kept consistent.
Further, in order to better implement the invention, the reeds are distributed in a ring shape, and one end of each reed close to the main shaft is fixedly arranged on the support.
Further, in order to better realize the invention, the reeds are divided into four pieces, and only one end of each piece of the reed close to the main shaft is fixedly arranged on the support for fixing.
Furthermore, in order to better realize the invention, the four-petal reeds are uniformly distributed in an annular shape along the main shaft.
Further, in order to better implement the invention, the reed is fixedly installed on the support through a bolt.
Further, in order to better implement the invention, the number of the gaskets is multiple, and the multiple gaskets are arranged in a superposition mode along the axis of the spindle.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) The mass flowmeter adopts the technical scheme that the reed is arranged on the support, and the impact of the fluid flow flowing through the spiral groove of the support on the impeller is controlled through the opening and closing degrees of the reed at different flows, so that the rotating speed of the rotating assembly in the whole flow range is basically kept consistent;
(2) The mass flowmeter also adjusts the quantity of the gaskets between the impeller and the support, and adjusts the distance between the impeller blade and the spiral groove of the support, thereby adjusting the rotating speed of the impeller to a certain degree;
(3) The invention has simple structure and is easy to realize.
Drawings
Fig. 1 is a schematic perspective view of a rotational speed control of a mass flow meter according to an embodiment of the present invention.
Fig. 2 is a perspective view of a support, a reed, and a spacer of a mass flow meter according to an embodiment of the present invention.
Wherein: 1. an impeller; 2. a reed; 3. a support; 4. a rotating assembly; 5. a helical groove; 6. and (7) a gasket.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1:
as shown in fig. 1 and fig. 2, the present embodiment provides a mass flowmeter with controllable rotation speed, including casing and impeller 1, support 3, runner assembly 4 that assemble in the casing and pass through main shaft coaxial arrangement, support 3 fixes inside the casing and is connected with the main shaft rotation, and is provided with the helicla flute 5 that can provide the effort to impeller 1's blade on the support 3, be provided with fretwork runner on the support 3 and install reed 2 that can open and shut the state according to flow size adjustment on the support 3, the mounted position of reed 2 corresponds with the fretwork runner position of support 3: when no flow or small flow exists, the reed 2 is closed relative to the hollow runner; when the flow is large, the reed 2 opens relative to the hollow runner; and a gasket 6 for adjusting the distance between the impeller 1 and the spiral groove 5 of the support 3 is also arranged between the impeller 1 and the support 3.
The support 3 of the mass flowmeter is fixed in the mass flowmeter, and the support 3 is provided with a spiral groove 5. When the fluid flows through the spiral groove 5 of the support 3, the spiral groove 5 of the support 3 changes the flow direction of the fluid, so that the blades of the impeller 1 obtain a moment to start rotating, thereby driving the whole rotating assembly 4 to rotate. The reed 2 is arranged on the support 3, and the reed 2 can open or close along with the increase or decrease of the fluid flow: when no flow or small flow exists, the reed 2 is basically in a closed state, and the fluid basically flows out of the spiral groove 5 of the support 3, so that the rotating speed of the impeller 1 is increased; at high flow rates, the reed 2 is in an open state, and relatively less fluid flows out of the spiral groove 5 of the support 3, so that the rotating speed of the impeller 1 is reduced.
Moreover, a spacer 6 is installed between the support 3 and the impeller 1, and the distance between the blade of the impeller 1 and the spiral groove 5 of the support 3 can be adjusted by adjusting the number of the spacers 6, thereby further adjusting the rotation speed of the impeller 1 to a certain degree.
In the embodiment, on one hand, the impact of the fluid flow flowing through the spiral groove 5 of the support 3 on the impeller 1 is controlled through the opening and closing degrees of the reeds 2 at different flow rates, and on the other hand, the distance between the blades of the impeller 1 and the spiral groove 5 of the support 3 is adjusted through adjusting the number of the gaskets 6, so that the rotating speed of the rotating assembly 4 in the whole flow rate range is basically kept consistent. That is to say, the rotation speed of the mass flowmeter according to the embodiment is controlled within a certain range, and the stability of the output signal is improved, so that the flow measurement accuracy is improved.
Example 2:
the present embodiment is further optimized on the basis of the above embodiment, as shown in fig. 2, a gasket 6 for adjusting the distance between the impeller 1 and the spiral groove 5 of the support 3 is further installed between the impeller 1 and the support 3; further, the number of the gaskets 6 is multiple, and the multiple gaskets 6 are stacked along the axis of the spindle.
In the embodiment, the gasket 6 is arranged between the support 3 and the impeller 1, and the distance between the blade of the impeller 1 and the spiral groove 5 of the support 3 can be adjusted by adjusting the number of the gaskets 6, so that the rotating speed of the impeller 1 is adjusted to a certain extent.
Other parts of this embodiment are the same as those of the above embodiment, and thus are not described again.
Example 3:
the present embodiment provides a specific structure of a mass flowmeter with controllable rotation speed on the basis of the above embodiments.
The mass flowmeter with the controllable rotating speed comprises a shell, an impeller 1, a support 3 and a rotating assembly 4, wherein the impeller 1, the support 3 and the rotating assembly 4 are assembled in the shell and are coaxially mounted through a main shaft, the support 3 is fixed in the shell and is rotatably connected with the main shaft, a spiral groove 5 capable of providing acting force for blades of the impeller 1 is formed in the support 3, and the impeller 1, the rotating assembly 4 and the main shaft are in key connection; be provided with on support 3 that fretwork runner and support 3 go up to install reed 2 that can open and shut the state according to flow size adjustment, the mounted position of reed 2 corresponds with the fretwork runner position of support 3: when no flow exists or the flow is small, the reed 2 is closed relative to the hollow runner; when the flow is large, the reed 2 opens relative to the hollow runner; and a gasket 6 for adjusting the distance between the impeller 1 and the spiral groove 5 of the support 3 is also arranged between the impeller 1 and the support 3.
The reed 2 is divided into four petals, the four petals of reeds 2 are uniformly distributed along the main shaft in an annular manner, and one end, close to the main shaft, of each petal of reed 2 is fixedly installed on the support 3 through a bolt.
Further, the number of the gaskets 6 is multiple, and the multiple gaskets 6 are arranged in a stacked mode along the axis of the spindle.
Other parts of this embodiment are the same as those of the above embodiment, and thus are not described again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (1)
1. A mass flowmeter with controllable rotating speed comprises a shell, an impeller (1), a support (3) and a rotating assembly (4), wherein the impeller (1), the support (3) and the rotating assembly (4) are assembled in the shell and are coaxially mounted through a main shaft, the support (3) is fixed in the shell and is rotatably connected with the main shaft, a spiral groove (5) capable of providing acting force for blades of the impeller (1) is formed in the support (3), and the impeller (1), the rotating assembly (4) and the main shaft are in key connection; the method is characterized in that: be provided with on support (3) the fretwork runner and support (3) install reed (2) that can open and shut the state according to flow size adjustment, the mounted position of reed (2) corresponds with the fretwork runner position of support (3): when no flow or small flow exists, the reed (2) is closed relative to the hollow runner; when the flow is large, the reed (2) opens relative to the hollow runner; a gasket (6) for adjusting the distance between the impeller (1) and the spiral groove (5) of the support (3) is also arranged between the impeller (1) and the support (3);
the reed (2) is divided into four pieces, and one end of each piece of reed (2) close to the main shaft is fixedly arranged on the support (3) through a bolt for fixing; four reed leaves (2) are uniformly distributed along the main shaft in an annular shape;
the number of the gaskets (6) is multiple, and the gaskets (6) are arranged in a stacked mode along the axis of the main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011269762.3A CN112362122B (en) | 2020-11-13 | 2020-11-13 | Controllable mass flow meter of rotational speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011269762.3A CN112362122B (en) | 2020-11-13 | 2020-11-13 | Controllable mass flow meter of rotational speed |
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| Publication Number | Publication Date |
|---|---|
| CN112362122A CN112362122A (en) | 2021-02-12 |
| CN112362122B true CN112362122B (en) | 2023-02-03 |
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| CN202011269762.3A Active CN112362122B (en) | 2020-11-13 | 2020-11-13 | Controllable mass flow meter of rotational speed |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116772953A (en) * | 2022-04-21 | 2023-09-19 | 广东德立科技发展有限公司 | Mass flowmeter and measuring system thereof |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3575052A (en) * | 1969-03-17 | 1971-04-13 | Bendix Corp | Mass flowmeter |
| JPS5336339B1 (en) * | 1971-02-18 | 1978-10-02 | ||
| US3958447A (en) * | 1975-07-09 | 1976-05-25 | Eldec Corporation | Mass flowmeter |
| US4468972A (en) * | 1982-04-19 | 1984-09-04 | Universal Cooperatives, Inc. | Flow meter with a motor driven impeller |
| CN2048185U (en) * | 1989-02-01 | 1989-11-22 | 符立亚 | Turbo-gas flowmeter with high sensitivity |
| US5370001A (en) * | 1993-06-02 | 1994-12-06 | Ametek, Inc. | Angular momentum mass flowmeter |
| CN2347142Y (en) * | 1998-10-21 | 1999-11-03 | 黄明金 | Gas flowmeter |
| CN102967336B (en) * | 2012-11-19 | 2015-10-28 | 四川泛华航空仪表电器有限公司 | Adjustable Error mass flowmeter |
| CN205655871U (en) * | 2016-04-06 | 2016-10-19 | 深圳市泉源仪表设备制造有限公司 | Binary channels turbine flowmeter |
| CN107270977A (en) * | 2016-04-06 | 2017-10-20 | 深圳市泉源仪表设备制造有限公司 | A kind of binary channels turbine flowmeter |
| CN107990953A (en) * | 2017-11-30 | 2018-05-04 | 四川泛华航空仪表电器有限公司 | Permanent rotating speed mass flowmenter |
| CN108896119B (en) * | 2018-05-18 | 2019-10-29 | 湖南欧柏测控***有限责任公司 | A kind of intelligence self-adjustable high-precision size water flow amount detecting device |
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